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Wang H, Sun Y, Zhou X, Zhu C, Wang X, Abbasi HN, Geng H, Zhu G, Wang X, Dai H. Simultaneous removal of nitrogen and phosphorus by aerobic denitrifying Paracoccus versutus JUST-3. BIORESOURCE TECHNOLOGY 2025; 428:132457. [PMID: 40164357 DOI: 10.1016/j.biortech.2025.132457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2025] [Revised: 03/25/2025] [Accepted: 03/26/2025] [Indexed: 04/02/2025]
Abstract
Strain JUST-3, exhibiting high-efficiency simultaneous nitrogen and phosphorus removal under aerobic conditions, was isolated and identified as Paracoccus versutus based on 16S rDNA gene sequencing and comprehensive physiological and biochemical analysis. The strain demonstrated optimal performance when cultured with sodium acetate as carbon source under the following conditions: C/N ratio of 10, P/N ratio of 0.2, 35 °C, and pH of 8.0. The variations in intermediate metabolites, the activity of functional enzymes, and the nitrogen/phosphorus balance experiments elucidated the pathways in nitrogen and phosphorus removal under aerobic conditions. Exogenous signal molecules (<50 nmol/L) could promote growth, enhance aerobic denitrification, and improve simultaneous nitrogen and phosphorus performance. The identification of signaling molecules represents a significant breakthrough, revealing novel regulatory mechanisms in microbial quorum-sensing systems and enabling precise control of microbial community behaviors. This study expands the application of aerobic denitrification and phosphorus removal technology, laying the foundation for wastewater treatment.
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Affiliation(s)
- Haoyun Wang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China.
| | - Yang Sun
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China
| | - Xingkun Zhou
- Suzhou Drainage Co., Ltd, Suzhou 215000 Jiangsu Province, China.
| | - Chengyuan Zhu
- Suzhou Drainage Co., Ltd, Suzhou 215000 Jiangsu Province, China.
| | - Xiujie Wang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China.
| | - Haq Nawaz Abbasi
- Department of Environmental Science, Federal Urdu University of Arts, Science and Technology, Karachi, Pakistan.
| | - Hongya Geng
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518075, China.
| | - Guangcan Zhu
- School of Energy and Environment, Southeast University, Nanjing 210096, China.
| | - Xingang Wang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China.
| | - Hongliang Dai
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China; School of Energy and Environment, Southeast University, Nanjing 210096, China.
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Zhang Y, Lu X, Yu S, Gu H, Fei X, Pan T, Li L, Ding Y, Ni M, Pan Y. Study on the mechanisms of efficient phosphorus recovery by a pilot-scale biofilm sequencing batch reactor under low carbon demand. ENVIRONMENTAL RESEARCH 2025; 273:121204. [PMID: 40020861 DOI: 10.1016/j.envres.2025.121204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2025] [Revised: 02/18/2025] [Accepted: 02/20/2025] [Indexed: 03/03/2025]
Abstract
To study the mechanism of a novel pilot-scale biofilm sequencing batch reactor (PS-BSBR) for efficient phosphorus recovery under low carbon demand. The phosphate uptake/release performance and carbon source utilization efficiency of PS-BSBR and a typical enhanced biological phosphate removal (EBPR) -A2O process were compared, and the detection methods of different phosphorus forms were improved. The results showed that phosphate uptake/release content of PS-BSBR were 3.07 times and 4.47 times of that of A2O process under high carbon source utilization efficiency, respectively. The PS-BSBR mainly used inorganic phosphorus (IP) in the form of non-apatite inorganic phosphorus (NAIP) in EPS (85-90%), which was dependent on the adsorption of biologically induced extracellular polymers (EPS). The A2O process was mainly based on the IP in the form of NAIP (60-70%) in the cell for phosphate uptake and release, that was, relying on the biological phosphorus metabolism in the cell of polyphosphate-accumulating organisms (PAOs). Macroomics sequencing revealed that PS-BSBR had a variety of PAOs and a high-abundance glycogen-accumulating organisms (GAOs). By up-regulating the expression of key genes related to cellular phosphorus metabolism and EPS secretion, PS-BSBR promoted the phosphorus metabolism of PAOs cells and the biologically induced phosphate adsorption and desorption, which were dominated by the synthesis and decomposition of EPS. Therefore, the phosphorus absorption and release performance of PS-BSBR process was significantly better than that of A2O process. This study could provide theoretical support and regulatory guidance for the application of PS-BSBR process in sewage phosphorus recovery under the consumption of low carbon sources.
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Affiliation(s)
- Yujie Zhang
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China
| | - Xumeng Lu
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China
| | - Shengqi Yu
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China
| | - Huijing Gu
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China
| | - Xiangyu Fei
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China
| | - Tianyu Pan
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China
| | - Lu Li
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China; National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Suzhou University of Science and Technology, Suzhou, 215009, China
| | - Yanyan Ding
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China; National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Suzhou University of Science and Technology, Suzhou, 215009, China
| | - Min Ni
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China; Jiangsu Key Laboratory of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China.
| | - Yang Pan
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China; National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Suzhou University of Science and Technology, Suzhou, 215009, China
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Majed N, Yan Y, Onnis-Hayden A, Li G, Gu AZ. Elucidating the factors that impact the abundance of aerobic and denitrifying polyphosphate-accumulating organisms in an integrated fixed film activated sludge-enhanced biological phosphorus removal process. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2025; 97:e70058. [PMID: 40312048 DOI: 10.1002/wer.70058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2024] [Revised: 01/20/2025] [Accepted: 03/06/2025] [Indexed: 05/03/2025]
Abstract
The integrated fixed-film activated sludge (IFAS)-enhanced biological phosphorus removal (EBPR) (IFAS-EBPR) system is significant for its ability to enhance nitrification and phosphorus removal by leveraging fixed-film carriers for nitrifiers and suspended growth for heterotrophs, but limited understanding of microbial dynamics and variable performance continues to drive interest in optimizing its application. This study investigated the key factors that affect the distribution and abundance of denitrifying (DPAOs) and non-denitrifying types of Accumulibacter-like polyphosphate-accumulating organisms (non-DPAOs) in a lab-scale continuous-flow IFAS-EBPR. The increase of nitrate recycles ratios from 1.0, 1.5, to 2.5Q affected both nitrogen (N) removal efficiency and EBPR activities, with P removal profile transitioning from having continuous P release to P uptake in anoxic zone. Population abundance analysis revealed that Clade I Accumulibacter (preconceived DPAO-Accumulibacter clade) correlated positively with the nitrate recycle flows (r = 0.96) and anoxic residual nitrate concentration (r = 0.99), while Clade II Accumulibacter (non-DPAO clade) showed negative correlation (r = -0.93), indicating the response of DPAO to the operational condition, particularly the nitrate recycle ratio, in our system. Furthermore, the relative abundance of DPAOs correlated negatively with the anoxic residual biodegradable COD (r = -0.99), anoxic hydraulic retention time (HRT) (r = -0.99), and nitrate and nitrite levels in the anoxic zone (r = -0.95, -0.99). SUMO model simulations revealed DPAO denitrification rates of 8.2, 7.8, and 4.1 gN/m3/d from 1.0, 1.5, to 2.5Q, accounting for only 5.8%, 9.5%, and 4.0% of nitrate removal in the anoxic zone, respectively. This study demonstrates that DPAO and non-DPAO populations are dynamically affected by operating conditions in a continuous-flow EBPR system, and the actual contribution of DPAO to the overall denitrification is relatively small (<10%). This study contributed to our better understanding of DPAO population dynamics and providing insights for optimizing DPAO in a EBPR processes for more sustainable wastewater treatment. PRACTITIONER POINTS: Accumulibacter-like DPAO subgroups and non-DPAOs coexist in IFAS-EBPR systems, with abundances controlled by nitrate recycle flows. DPAOs contribute <10% to overall denitrification, but their enrichment significantly impacts carbon reduction in EBPR processes. Optimizing nitrate recycle ratio (around 1.5) balances nitrate recycling and oxygen inhibition, enhancing DPAO performance in wastewater treatment. Understanding DPAO subpopulation dynamics is crucial for designing efficient BNR systems with reduced external carbon requirements.
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Affiliation(s)
- Nehreen Majed
- Department of Civil & Environmental Engineering, Northeastern University, Boston, Massachusetts, USA
- Department of Civil Engineering, University of Asia Pacific, Dhaka, Bangladesh
| | - Yuan Yan
- School of Civil & Environmental Engineering, Cornell University, Ithaca, New York, USA
| | - Annalisa Onnis-Hayden
- Department of Civil & Environmental Engineering, Northeastern University, Boston, Massachusetts, USA
| | - Guangyu Li
- School of Civil & Environmental Engineering, Cornell University, Ithaca, New York, USA
| | - April Z Gu
- Department of Civil & Environmental Engineering, Northeastern University, Boston, Massachusetts, USA
- School of Civil & Environmental Engineering, Cornell University, Ithaca, New York, USA
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Song G, Bi Z, Liu Y, Huang Y. Influence of operation sequences on phosphorus enrichment by polyphosphate accumulating organisms biofilm: Performance, phosphorus transfer and phosphate metabolism in biofilm. ENVIRONMENTAL RESEARCH 2025; 277:121560. [PMID: 40203978 DOI: 10.1016/j.envres.2025.121560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2025] [Revised: 03/20/2025] [Accepted: 04/05/2025] [Indexed: 04/11/2025]
Abstract
This study investigated the impact of different operational sequences on phosphorus removal and enrichment in biofilm phosphorus enrichment system. The research com-pared two distinct operational modes, analyzing phosphorus uptake and release characteristics in cells and extracellular polymeric substances (EPS) over a single cycle, while also examining microbial community composition and associated functional genes. After long-term acclimation, the Ae/An system achieved higher phosphorus concentration (120 mg/L) than the An/Ae system (65 mg/L). However, the An/Ae system showed stronger phosphorus uptake and release capabilities due to higher phosphorus load during the aerobic phase. In both systems, Mg-P and Ca-P dominated in cells and EPS. Compared to the Ae/An system, the An/Ae system stored phosphorus mainly in EPS, with higher orthophosphate content. However, EPS-associated phosphorus is more easily released, explaining the An/Ae system's higher aerobic phosphorus load but lower overall storage capacity. Microbial analysis revealed higher abundance of phosphorus accumulating organisms (PAOs) in the An/Ae system (25.99 % vs. 19.69 %), while glycogen accumulating organisms (GAOs) showed the opposite trend. Candidatus Competibacter was abundant in both systems and correlated with phosphorus metabolism genes. The An/Ae system expressed the pst system more, whereas the Ae/An favored the pit system, suggesting that transfer system variations affect enrichment solution concentration. Lower expression of polyphosphate kinase (ppk1) in the An/Ae system may explain its unsatisfied phosphorus enrichment performance. Mantel analysis confirmed connections among environmental factors, kinetic parameters, phosphorus metabolism genes, and phosphorus morphology in EPS, demonstrating their combined influence on enrichment solution concentration.
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Affiliation(s)
- Ge Song
- School of Environment Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China
| | - Zhen Bi
- School of Environment Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China; National and Local Joint Engineering Laboratory for Municipal Sewage Resource Utilization Technology, Suzhou University of Science and Technology, Suzhou, 215009, China.
| | - Yuqing Liu
- School of Environment Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China
| | - Yong Huang
- School of Environment Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China; National and Local Joint Engineering Laboratory for Municipal Sewage Resource Utilization Technology, Suzhou University of Science and Technology, Suzhou, 215009, China
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Srivastava G, Singh NK, Tyagi VK, Kazmi AA. Genera complying denitrifying phosphorus removal community contribute excellent SND-PR in a pilot cyclic SBR: Effect of DO, settling and recirculation rate on process performance. ENVIRONMENTAL RESEARCH 2025; 270:121011. [PMID: 39909093 DOI: 10.1016/j.envres.2025.121011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2024] [Revised: 01/23/2025] [Accepted: 01/29/2025] [Indexed: 02/07/2025]
Abstract
This work investigated the role of operational conditions and typical functional microbes to maximize the nutrient removal efficiency of a pilot-scale sequencing batch reactor (SBR) system (100 m3/d) that treated municipal wastewater. The pilot system was operated in five phases, including start-up and four runs at variable cycle times (2.0, 1.5, 1.7, 2.0, and 3.0h) with an average readily biodegradable chemical oxygen demand (rbCOD) to chemical oxygen demand (COD) ratio of ∼15.3%. The best TN removal 'ηmax' of 75.6 ± 5.6% (TNinfluent = 27.5 ± 6.5 mg/L, TNeffluent ≤ 5.9 mg/L) and TP removal 'pmax' 77.9 ± 6.3% (TPinfluent = 3.8 ± 1.3 mg/L, TPeffluent ≤ 1.0 mg/L) along with the COD, biochemical oxygen demand (BOD), and total suspended solids (TSS) removal efficiencies of 87.3 ± 4.5%, 92.7 ± 2.8%, 92.0 ± 3.5%, respectively, were observed during run 3 (2h cycle) at settling/total cycle times ratio (S/T) of 0.33 and recirculation/total cycle times ratio (R/T) of 0.017 (6.4%), and operating DO of 0.5-2.5 mg/L. The denitrifying polyphosphate accumulating organisms 'DPAOs' of Burkholderia (17.0%), Rhodocyclales (6.1%), and Flavobacterium (8.7%) classes, and Nitrifiers of Nitrospira (5.4%) and Nitrosomonas (5.4%) classes were dominant in accomplishing simultaneous nitrification, denitrification, and phosphorus removal (SND-PR) in the pilot system.
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Affiliation(s)
- Ghazal Srivastava
- Environmental Engineering Group, Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 247667, India.
| | - Naval Kishore Singh
- School of Environment & Natural Resources, Doon University, Dehradun, 248001, Uttarakhand, India
| | - Vinay Kumar Tyagi
- Environmental Hydrology Division, National Institute of Hydrology, Roorkee, Uttarakhand, 247667, India
| | - Absar Ahmad Kazmi
- Environmental Engineering Group, Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 247667, India
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Bian X, Zhang M, Huang J, Li F, Feng H, Ma J. A comparison study on membrane fouling in A/O-MBR and A/A-MBR at different mixed liquor-suspended solids concentrations. ENVIRONMENTAL TECHNOLOGY 2025; 46:1625-1635. [PMID: 39172023 DOI: 10.1080/09593330.2024.2394905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Accepted: 07/19/2024] [Indexed: 08/23/2024]
Abstract
Membrane fouling leads to decreased membrane flux, increases the frequency of membrane tissue replacement and membrane cleaning, and increases the operating cost of membrane bioreactor. In this study, the pollutant removal effects, membrane fouling differences and microbial characteristics of anaerobic/aerobic MBR (A/O-MBR) and anaerobic/anoxic MBR (A/A-MBR) were investigated at different mixed liquor suspended solids (MLSS) concentrations. The results showed that the chemical cleaning cycle of membrane contamination was 12, 28, 44 h and 24, 40, 104 h, respectively, and the cycle was prolonged with the increase of MLSS concentration (from 6000 to 9000 mg L-1). A/O-MBR was 1.4-2.4 times the rate of membrane fouling of A/A-MBR. In irreversible resistance, extracellular polymer substances (EPS) were the most significant contributors to membrane fouling. EPS concentration in A/A-MBR (118.33, 73.75, 54.26 mg/gMLSS) was lower than that in A/O-MBR (171.68, 91.92, 62.33 mg/gMLSS). Therefore, increasing MLSS concentration could mitigate membrane fouling. 16S rRNA high-throughput sequencing demonstrated that filamentous bacteria was the primary reason for the membrane fouling difference. Filamentous bacteria were more likely to be attached to the surface of the membrane, causing membrane fouling. The abundance percentage of filamentous bacteria in A/A-MBR was smaller than that in A/O-MBR. In summary, The excellent performance of A/A-MBR in membrane fouling behaviour, resistance analysis, EPS and microorganisms proved that A/A-MBR is more promising than A/O-MBR in wastewater nitrogen and phosphorus removal. This study can provide a theoretical basis for the application of MBR in the field of sewage treatment.
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Affiliation(s)
- Xiaozheng Bian
- School of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou, People's Republic of China
- Henan Engineering Research Center of Water Pollution and Soil Damage Remediation, Zhengzhou, People's Republic of China
| | - Mengyuan Zhang
- School of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou, People's Republic of China
| | - Jianping Huang
- School of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou, People's Republic of China
- Henan Engineering Research Center of Water Pollution and Soil Damage Remediation, Zhengzhou, People's Republic of China
| | - Fongyau Li
- Chemistry department, National University of Singapore, Singapore, Singapore
| | - Huatao Feng
- Chemistry department, National University of Singapore, Singapore, Singapore
| | - Jianqin Ma
- School of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou, People's Republic of China
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Chen S, Zhang QP, Zhang JS, An N, Yu HY, Fu X, Li ZH. Enhanced nitrogen removal for low C/N wastewater via preventing futile carbon oxidation and augmenting anammox. WATER RESEARCH X 2024; 25:100253. [PMID: 39291147 PMCID: PMC11405960 DOI: 10.1016/j.wroa.2024.100253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/11/2024] [Revised: 08/25/2024] [Accepted: 08/28/2024] [Indexed: 09/19/2024]
Abstract
Efficient carbon use is crucial for biological nitrogen removal. Traditional aerobic processes can waste carbon sources, exacerbating carbon deficiency. This study explores an anaerobic/oxic/anoxic system with sludge double recirculation to improve nitrogen removal in low C/N wastewater. This system integrated aerobic nitrification after the carbon intracellular storage, separating carbon and nitrogen by denitrifying glycogen-accumulating organisms (DGAOs) with endogenous partial denitrification and Anammox within the anoxic units. A significant efficiency of 91.02±7.01% chemical oxygen demand (COD) was converted into intracellular carbon in anaerobic units, significantly reducing carbon futile oxidation in the aerobic units by effectively separating COD from ammonia. Intracellular storage of carbon sources and microbial adaptation to carbon scarcity prevent futile oxidation of COD in the aerobic units even with short-term high dissolved oxygen (DO), thereby enhancing nitrogen removal under anoxic conditions with sufficient intracellular carbon source. The microbial analysis identified Candidatus Brocadia as the dominant anammox bacteria, in combination with the activity of DGAOs and other related microbial communities, accounting for 37.0% of the TN removal. Consequently, the system demonstrated remarkable nitrogen removal efficiencies, achieving 81.3±3.3% for total nitrogen (TN) and 98.5±0.9% for ammonia nitrogen while maintaining an effluent COD concentration of 17.2±9.1 mg/L, treating the low C/N of 4.18 in the influent wastewater. The findings in this study provide a sustainable and energy-saving technique for conventional WWTPs to meet strict discharge standards by avoiding futile oxidation of COD and encouraging anammox contributions.
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Affiliation(s)
- Song Chen
- Key Laboratory of Northwest Water Resource, Environment, and Ecology, MOE, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
- Xi'an Key Laboratory of Intelligent Equipment Technology for Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
- Shenzhen Water (Group) Co., Ltd., Shenzhen 518030, China
| | - Qing-Pei Zhang
- Shenzhen Water (Group) Co., Ltd., Shenzhen 518030, China
| | - Jin-Song Zhang
- Shenzhen Water (Group) Co., Ltd., Shenzhen 518030, China
| | - Na An
- Shenzhen Water (Group) Co., Ltd., Shenzhen 518030, China
| | - Hai-Yang Yu
- Shenzhen Water (Group) Co., Ltd., Shenzhen 518030, China
| | - Xiang Fu
- Shenzhen Water (Group) Co., Ltd., Shenzhen 518030, China
| | - Zhi-Hua Li
- Key Laboratory of Northwest Water Resource, Environment, and Ecology, MOE, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
- Xi'an Key Laboratory of Intelligent Equipment Technology for Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
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Askari SS, Giri BS, Basheer F, Izhar T, Ahmad SA, Mumtaz N. Enhancing sequencing batch reactors for efficient wastewater treatment across diverse applications: A comprehensive review. ENVIRONMENTAL RESEARCH 2024; 260:119656. [PMID: 39034021 DOI: 10.1016/j.envres.2024.119656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 06/29/2024] [Accepted: 07/19/2024] [Indexed: 07/23/2024]
Abstract
This review explores recent progress in sequencing batch reactors (SBRs) and hybrid systems for wastewater treatment, emphasizing their adaptability and effectiveness in managing diverse wastewater compositions. Through extensive literature analysis from 1985 to 2024, the integration of advanced technologies like photocatalysis within hybrid systems is highlighted, showing promise for improved pollutant removal efficiencies. Insights into operational parameters, reactor design, and microbial communities influencing SBR performance are discussed. Sequencing batch biofilm reactors (SBBRs) demonstrate exceptional efficiency in Chemical Oxygen Demand, nitrogen, and phosphorus removal, while innovative anaerobic-aerobic-anoxic sequencing batch reactors (AOA-SBRs) offer effective nutrient removal strategies. Hybrid systems, particularly photocatalytic sequencing batch reactors (PSBRs), show potential for removing persistent pollutants like antibiotics and phenols, underscoring the significance of advanced oxidation processes. However, research gaps persist, including the need for comparative studies between different SBR types and comprehensive evaluations of long-term performance, environmental variability, and economic viability. Addressing these gaps will be vital for the practical deployment of SBRs and hybrid systems. Further exploration of synergies, economic considerations, and reactor stability will enhance the sustainability and scalability of these technologies for efficient and eco-friendly wastewater treatment.
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Affiliation(s)
- Syed Shuja Askari
- Department of Civil Engineering, Integral University, Lucknow, 226026, India
| | - Balendu Shekher Giri
- School of Engineering, University of Petroleum and Energy Studies, Dehradun, Uttarakhand, 248007, India
| | - Farrukh Basheer
- Department of Civil Engineering, Aligarh Muslim University, Aligarh, 202002, India
| | - Tabish Izhar
- Department of Civil Engineering, Integral University, Lucknow, 226026, India
| | - Syed Aqeel Ahmad
- Department of Civil Engineering, Integral University, Lucknow, 226026, India
| | - Neha Mumtaz
- Department of Civil Engineering, Integral University, Lucknow, 226026, India.
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9
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Li W, Hou Y, Ye Y, Bin Y, Gao Y, Dong Z. Performance of short-cut denitrifying phosphorus removal and microbial community structure in the A 2SBR process. ENVIRONMENTAL TECHNOLOGY 2024; 45:3468-3478. [PMID: 37226862 DOI: 10.1080/09593330.2023.2218558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 04/22/2023] [Indexed: 05/26/2023]
Abstract
ABSTRACTAcclimatization of short-cut denitrifying polyphosphate accumulating organisms (SDPAOs), metabolic mechanism, and operating parameters were analyzed to investigate the performance of the anaerobic/anoxic sequencing batch reactor (A2SBR) process. The high-throughput sequencing technology was employed to explore the microbial community structures of activated sludge systems. The experimental results illustrated that SDPAOs were successfully enriched with three-phase inoculation for 36 days. The removal rates of TP and NO2--N were 93.22% and 91.36%, respectively, under the optimal parameters of a pH of 7.5, an SRT of 26 days, a temperature of 24 ℃ and a COD of 200.00 mg·L-1 using acetate as the carbon source. In the anaerobic stage, 82.20% external carbon source was converted into 88.78 mg·g-1 PHB, and the removal rate of NO2--N in the anoxic stage was characterized by ΔNO2--N/ΔPHB, anoxic ΔP/ΔPHBeffective was 0.289, which was higher than anaerobic ΔP/ΔCODeffective of 0.203. Ignavibacterium and Povalibacter with significant phosphorus removal ability were the dominant bacterial genera. The nitrogen and phosphorus removal could be realized simultaneously in an anaerobic/anoxic sequencing batch reactor. Therefore, this study provided an important understanding of the removal of nitrogen and phosphorus from low-carbon nitrogen wastewater.
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Affiliation(s)
- Wei Li
- School of Municipal and Environmental Engineering, Shenyang Jianzhu University, Shenyang, People's Republic of China
| | - Yunhe Hou
- School of Municipal and Environmental Engineering, Shenyang Jianzhu University, Shenyang, People's Republic of China
| | - Youlin Ye
- School of Municipal and Environmental Engineering, Shenyang Jianzhu University, Shenyang, People's Republic of China
| | - Ye Bin
- Appraisal Center for Environment and Engineering, Ministry of Ecology and Environment, Beijing, People's Republic of China
| | - Yunan Gao
- School of Environmental and Chemical Engineering, Foshan University, Foshan, People's Republic of China
| | - Zijun Dong
- College of Civil and Transportation Engineering, Shenzhen University, Shenzhen, People's Republic of China
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10
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Li X, Cai Y, Qiu Q, Wu J, Wang J, Qiu J. Monitoring Ammonium Polyphosphate (APP) Biodegradation by Acinetobacter nosocomialis D-3 Using DAPI. Molecules 2024; 29:2667. [PMID: 38893541 PMCID: PMC11173948 DOI: 10.3390/molecules29112667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2024] [Revised: 05/24/2024] [Accepted: 05/24/2024] [Indexed: 06/21/2024] Open
Abstract
Ammonium polyphosphate (APP), a pivotal constituent within environmentally friendly flame retardants, exhibits notable decomposition susceptibility and potentially engenders ecological peril. Consequently, monitoring the APP concentration to ensure product integrity and facilitate the efficacious management of wastewater from production processes is of great significance. A fluorescent assay was devised to swiftly discern APP utilizing 4',6'-diamino-2-phenylindole (DAPI). With increasing APP concentrations, DAPI undergoes intercalation within its structure, emitting pronounced fluorescence. Notably, the flame retardant JLS-PNA220-A, predominantly comprising APP, was employed as the test substrate. Establishing a linear relationship between fluorescence intensity (F-F0) and JLS-PNA220-A concentration yielded the equation y = 76.08x + 463.2 (R2 = 0.9992), with a LOD determined to be 0.853 mg/L. The method was used to assess the degradation capacity of APP-degrading bacteria. Strain D-3 was isolated, and subsequent analysis of its 16S DNA sequence classified it as belonging to the Acinetobacter genus. Acinetobacter nosocomialis D-3 demonstrated superior APP degradation capabilities under pH 7 at 37 °C, with degradation rates exceeding 85% over a four-day cultivation period. It underscores the sensitivity and efficacy of the proposed method for APP detection. Furthermore, Acinetobacter nosocomialis D-3 exhibits promising potential for remediation of residual APP through environmental biodegradation processes.
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Affiliation(s)
- Xiangxiang Li
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Yule Cai
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Qiqing Qiu
- Hangzhou JLS Flame Retardants Chemical Co., Ltd., Hangzhou 310011, China
| | - Jiamin Wu
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Jing Wang
- Hangzhou JLS Flame Retardants Chemical Co., Ltd., Hangzhou 310011, China
| | - Jieqiong Qiu
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou 310018, China
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11
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Zhang X, Huang C, Sui W, Wu X, Zhang X. Irons differently modulate bacterial guilds for leading to varied efficiencies in simultaneous nitrification and denitrification (SND) within four aerobic bioreactors. CHEMOSPHERE 2024; 358:142216. [PMID: 38705403 DOI: 10.1016/j.chemosphere.2024.142216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 04/17/2024] [Accepted: 04/30/2024] [Indexed: 05/07/2024]
Abstract
As a novel biological wastewater nitrogen removal technology, simultaneous nitrification and denitrification (SND) has gained increasing attention. Iron, serving as a viable material, has been shown to influence nitrogen removal. However, the precise impact of iron on the SND process and microbiome remains unclear. In this study, bioreactors amended with iron of varying valences were evaluated for total nitrogen (TN) removal efficiencies under aerobic conditions. The acclimated control reactor without iron addition (NCR) exhibited high ammonia nitrogen (AN) removal efficiency (98.9%), but relatively low TN removal (78.6%) due to limited denitrification. The reactor containing zero-valent iron (Fe0R) demonstrated the highest SND rate of 92.3% with enhanced aerobic denitrification, albeit with lower AN removal (84.1%). Significantly lower SND efficiencies were observed in reactors with ferrous (Fe2R, 66.3%) and ferric (Fe3R, 58.2%) iron. Distinct bacterial communities involved in nitrogen metabolisms were detected in these bioreactors. The presence of complete ammonium oxidation (comammox) genus Nitrospira and anammox bacteria Candidatus Brocadia characterized efficient AN removal in NCR. The relatively low abundance of aerobic denitrifiers in NCR hindered denitrification. Fe0R exhibited highly abundant but low-efficiency methanotrophic ammonium oxidizers, Methylomonas and Methyloparacoccus, along with diverse aerobic denitrifiers, resulting in lower AN removal but an efficient SND process. Conversely, the presence of Fe2+/Fe3+ constrained the denitrifying community, contributing to lower TN removal efficiency via inefficient denitrification. Therefore, different valent irons modulated the strength of nitrification and denitrification through the assembly of key microbial communities, providing insight for microbiome modulation in nitrogen-rich wastewater treatment.
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Affiliation(s)
- Xinyu Zhang
- State Key Laboratory of Microbial Metabolism, and Joint International Research Laboratory of Metabolic & Developmental Sciences, and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Chengli Huang
- State Key Laboratory of Microbial Metabolism, and Joint International Research Laboratory of Metabolic & Developmental Sciences, and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Weikang Sui
- State Key Laboratory of Microbial Metabolism, and Joint International Research Laboratory of Metabolic & Developmental Sciences, and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Xiaogang Wu
- State Key Laboratory of Microbial Metabolism, and Joint International Research Laboratory of Metabolic & Developmental Sciences, and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Xiaojun Zhang
- State Key Laboratory of Microbial Metabolism, and Joint International Research Laboratory of Metabolic & Developmental Sciences, and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China.
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12
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Bai M, Zhao W, Wang Y, Bi X, Su S, Qiu H, Gao Z. Towards low carbon demand and highly efficient nutrient removal: Establishing denitrifying phosphorus removal in anaerobic/anoxic/oxic + nitrification system. BIORESOURCE TECHNOLOGY 2024; 395:130385. [PMID: 38281549 DOI: 10.1016/j.biortech.2024.130385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 01/23/2024] [Accepted: 01/23/2024] [Indexed: 01/30/2024]
Abstract
A two-sludge anaerobic/anoxic/oxic + nitrification system with simultaneous nitrogen and phosphorus removal was studied for enhanced low-strength wastewater treatment. After 158 days of operation, excellent NH4+-N, chemical oxygen demand (COD) and PO43--P removal (99.0 %, 90.0 % and 92.0 %, respectively) were attained under a low carbon/nitrogen ratio of 5, resulting in effluent NH4+-N, COD and PO43--P concentrations of 0.3, 30.0 and 0.5 mg/L, respectively. The results demonstrate that the anaerobic/anoxic/oxic sequencing batch reactor (A2-SBR) and nitrification sequencing batch reactor (N-SBR) had favorable denitrifying phosphorus removal and nitrification performance, respectively. High-throughput sequencing results indicate that the phosphate-accumulating organisms Dechloromonas (1.1 %) and Tetrasphaera (1.2 %) were enriched in the A2-SBR, while the ammonia-oxidizing bacteria Nitrosomonas (7.8 %) and the nitrite-oxidizing bacteria Nitrospira (18.1 %) showed excellent accumulation in the N-SBR. Further analysis via functional prediction revealed that denitrification is the primary pathway of nitrogen metabolism throughout the system. Overall, the system achieved low carbon and high efficiency nutrient removal.
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Affiliation(s)
- Meng Bai
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266525, PR China
| | - Weihua Zhao
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266525, PR China.
| | - Yanyan Wang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266525, PR China
| | - Xuejun Bi
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266525, PR China
| | - Shaoqing Su
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266525, PR China
| | - Haojie Qiu
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266525, PR China
| | - Zhongxiu Gao
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266525, PR China
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13
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Wang X, Zhang G, Ding A, Xie E, Tan Q, Xing Y, Wu H, Tian Q, Zhang Y, Zheng L. Distinctive species interaction patterns under high nitrite stress shape inefficient denitrifying phosphorus removal performance. BIORESOURCE TECHNOLOGY 2024; 394:130269. [PMID: 38154736 DOI: 10.1016/j.biortech.2023.130269] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 12/21/2023] [Accepted: 12/25/2023] [Indexed: 12/30/2023]
Abstract
Denitrifying phosphorus removal using nitrite as an electron acceptor is an innovative, resource-efficient approach for nitrogen and phosphorus removal. However, the inhibitory effects of nitrite on anoxic phosphorus uptake and process stability are unclear. This study investigated the total phosphorus removal performance under nitrite stress and analyzed microbiome responses in 186 sludge samples. The results indicated that the total phosphorus removal rates and dominant taxon abundance were highly similar under nitrite stress. High nitrite stress induced a community-state shift, leading to unstable dynamics and decreased total phosphorus removal. This shift resulted from increased species cooperation. Notably, the shared genera OLB8 and Zoogloea under non-inhibitory nitrite stress, suggesting their vital roles in mitigating nitrite stress by enhancing carbon and energy metabolism. The response patterns of these bacterial communities to high nitrite stress can guide the design and optimization of high-nitrogen wastewater reactors.
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Affiliation(s)
- Xue Wang
- College of Water Sciences, Beijing Normal University, Beijing 100875, China
| | - Guoyu Zhang
- Department of Environmental Engineering, School of Marine Science and Technology, Harbin Institute of Technology, Weihai 264209, China
| | - Aizhong Ding
- College of Water Sciences, Beijing Normal University, Beijing 100875, China
| | - En Xie
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China
| | - Qiuyang Tan
- College of Water Sciences, Beijing Normal University, Beijing 100875, China
| | - Yuzi Xing
- College of Water Sciences, Beijing Normal University, Beijing 100875, China
| | - Haoming Wu
- College of Water Sciences, Beijing Normal University, Beijing 100875, China
| | - Qi Tian
- College of Water Sciences, Beijing Normal University, Beijing 100875, China
| | - Yaoxin Zhang
- College of Water Sciences, Beijing Normal University, Beijing 100875, China
| | - Lei Zheng
- College of Water Sciences, Beijing Normal University, Beijing 100875, China.
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14
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Zhou Y, Celine Zhang Y, Hu X, Zhou Y, Bai Y, Xiang P, Zhang Z. Overlooked role in bacterial assembly of different-sized granules in same sequencing batch reactor: Insights into bacterial niche of nutrient removal. BIORESOURCE TECHNOLOGY 2024; 391:129992. [PMID: 37949147 DOI: 10.1016/j.biortech.2023.129992] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 11/05/2023] [Accepted: 11/05/2023] [Indexed: 11/12/2023]
Abstract
The unique ecosystem within different-sized granules affects microbial assembly, which is crucial for wastewater treatment performance. This study operated an aerobic granular sludge system to evaluate its performance in treating synthetic municipal wastewater. Subsequently, the microbial community within different-sized granules was characterized to investigate bacterial assembly, and elucidated their biological potential for nutrient removal. The nutrient removal efficiencies were as follows: 93.8 ± 2.8 % chemical oxygen demand, 65.4 ± 4.0 % total nitrogen, and 93.8 ± 6.8 % total phosphorus. The analysis of microbial assembly unveiled remarkable diversity among different-sized sludges, the genus relative abundance displayed 61.4 % positive and 33.0 % negative correlation with sludge size. The excellent potential for organic degradation, denitrification, and polyphosphate accumulation occurred in sludge sizes of > 0.75 mm, 0.20-0.50 mm, and < 0.20 mm, respectively. Functional annotation further confirmed the nutrient removal potential within different-sized sludges. This study provides valuable insights into the bacterial niche of different-sized sludges, which can enhance their practical application.
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Affiliation(s)
- Yingying Zhou
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China; College of Environment and Ecology, Chongqing University, Chongqing 400045, China
| | | | - Xueli Hu
- College of Environment and Ecology, Chongqing University, Chongqing 400045, China
| | - Yuanhang Zhou
- College of Environment and Ecology, Chongqing University, Chongqing 400045, China
| | - Yun Bai
- College of Environment and Ecology, Chongqing University, Chongqing 400045, China
| | - Ping Xiang
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China; College of Environment and Ecology, Chongqing University, Chongqing 400045, China
| | - Zhi Zhang
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China; College of Environment and Ecology, Chongqing University, Chongqing 400045, China.
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15
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Tong T, Tong J, Xue K, Li Y, Yu J, Wei Y. Microbial community structure and functional prediction in five full-scale industrial park wastewater treatment plants. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 904:166529. [PMID: 37625722 DOI: 10.1016/j.scitotenv.2023.166529] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 08/18/2023] [Accepted: 08/22/2023] [Indexed: 08/27/2023]
Abstract
The development of industrial parks has become an important global trend contributing significantly to economic and industrial growth. However, this growth comes at a cost, as the treatment of multisource industrial wastewater generated in these parks can be difficult owing to its complex composition. Microorganisms play a critical role in pollutant removal during industrial park wastewater treatment. Therefore, our study focused on the microbial communities in five full-scale industrial park wastewater treatment plants (WWTPs) with similar treatment processes and capacities. The results showed that denitrifying bacteria were dominant in almost every process section of all the plants, with heterotrophic denitrification being the main pathway. Moreover, autotrophic sulfur denitrification and methane oxidation denitrification may contribute to total nitrogen (TN) removal. In plants where the influent had low levels of COD and TN, dominant bacteria included oligotrophic microorganisms like Prosthecobacter (2.88 % ~ 10.02 %) and hgcI_clade (2.05 % ~ 9.49 %). Heavy metal metabolizing microorganisms, such as Norank_f__PHOS-HE36 (3.96 % ~ 5.36 %) and Sediminibacterium (1.86 % ~ 5.34 %), were prevalent in oxidation ditch and secondary settling tanks in certain plants. Functional Annotation of Prokaryotic Taxa (FAPROTAX) revealed that microbial communities in the regulation and hydrolysis tanks exhibited higher potential activity in the nitrogen (N) and sulfur (S) cycles than those in the oxidation ditch. Sulfate/sulfite reduction was common in most plants, whereas the potential occurrence of sulfide compounds and thiosulfate oxidation tended to be higher in plants with a relatively high sulfate concentration and low COD content in their influent. Our study provides a new understanding of the microbial community in full-scale industrial park WWTPs and highlights the critical role of microorganisms in the treatment of industrial wastewater.
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Affiliation(s)
- Tujun Tong
- School of Environmental Science & Engineering, Tianjin University, Tianjin 300350, China; China Energy Conservation and Environmental Protection Group, Beijing 100082, China
| | - Juan Tong
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China; Department of Water Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Keni Xue
- Department of Water Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Yanan Li
- Department of Water Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Jiangze Yu
- University of Chinese Academy of Sciences, Beijing 100049, China; Department of Water Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Yuansong Wei
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China; Department of Water Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
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16
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Zhang H, Zhang SS, Zhang W, Ma WC, Pan Y, Chen L, Zhu L, Li YP, Li JR. Clarification of the phosphorus release mechanism for recovering phosphorus from biofilm sludge in alternating aerobic/anaerobic biofilm system. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 904:166811. [PMID: 37673249 DOI: 10.1016/j.scitotenv.2023.166811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 07/16/2023] [Accepted: 09/02/2023] [Indexed: 09/08/2023]
Abstract
A novel wastewater treatment plant process was constructed to overcome the challenge of simultaneous nitrate removal and phosphorus (P) recovery. The results revealed that the P and nitrate removal efficiency rose from 39.0 % and 48.4 % to 92.8 % and 93.6 % after 136 days of operation, and the total P content in the biofilm (TPbiofilm) rose from 15.8 mg/g SS to 57.8 mg/g SS. Moreover, the increase of TPbiofilm changed the metabolic mode of denitrifying polyphosphate accumulating organisms (DPAOs), increasing the P concentration of the enriched stream to 172.5 mg/L. Furthermore, the acid/alkaline fermentation led to the rupture of the cell membrane, which released poly-phosphate and ortho-phosphate of cell/EPS in DPAOs and released metal‑phosphorus (CaP and MgP). In addition, high-throughput sequencing analysis demonstrated that the relative abundance of DPAOs involved in P storage increased, wherein the abundance of Acinetobacter and Saprospiraceae rose from 8.0 % and 4.1 % to 16.1 % and 14.0 %. What's more, the highest P recovery efficiency (98.3 ± 1.1 %) could be obtained at optimal conditions for struvite precipitation (pH = 7.56 and P: N: Mg = 1.87:3.66:1) through the response surface method (RSM) simulation, and the precipitates test analysis indicated that P recovery from biofilm sludge was potentially operable. This research was of great essentiality for exploring the recovery of P from biofilm sludge.
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Affiliation(s)
- Hao Zhang
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China
| | - Shuang-Shuang Zhang
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China
| | - Wei Zhang
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China
| | - Wu-Cheng Ma
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China
| | - Yang Pan
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Lin Chen
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China
| | - Liang Zhu
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China.
| | - Yi-Ping Li
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China.
| | - Jing-Ru Li
- School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450046, China
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17
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Pelevina A, Gruzdev E, Berestovskaya Y, Dorofeev A, Nikolaev Y, Kallistova A, Beletsky A, Ravin N, Pimenov N, Mardanov A. New insight into the granule formation in the reactor for enhanced biological phosphorus removal. Front Microbiol 2023; 14:1297694. [PMID: 38163067 PMCID: PMC10755871 DOI: 10.3389/fmicb.2023.1297694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Accepted: 11/15/2023] [Indexed: 01/03/2024] Open
Abstract
While granulated activated sludge exhibits high productivity, the processes of granule formation are incompletely studied. The processes of granule formation and succession of communities were investigated in a laboratory sequencing batch reactor (SBR) under conditions for enhanced biological phosphorus removal (EBPR) using microbiological and molecular techniques. Active consumption of acetate, primarily by the phosphate-accumulating organisms (PAO), commenced at day 150 of cultivation. This was indicated by the high ratio of molar P-released/acetate uptake (0.73-0.77 P-mol/C-mol), characteristic of PAO. During this period, two types of granule-like aggregates formed spontaneously out of the activated sludge flocs. The aggregates differed in morphology and microbial taxonomic composition. While both aggregate types contained phosphorus-enriched bacterial cells, PAO prevailed in those of morphotype I, and glycogen-accumulating organisms (GAOs) were predominant in the aggregates of morphotype II. After 250 days, the elimination of the morphotype II aggregates from the reactor was observed. The subsequent selection of the community was associated with the development of the morphotype I aggregates, in which the relative abundance of PAO increased significantly, resulting in higher efficiency of phosphorus removal. Metagenomic analysis revealed a predominance of the organisms closely related to Candidatus Accumulibacter IС and IIС and of Ca. Accumulibacter IIB among the PAO. Based on the content of the genes of the key metabolic pathways, the genomes of potential PAO belonging to the genera Amaricoccus, Azonexus, Thauera, Zoogloea, Pinisolibacter, and Siculibacillus were selected. The patterns of physicochemical processes and the microbiome structure associated with granule formation and succession of the microbial communities were revealed.
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Affiliation(s)
- Anna Pelevina
- Winogradsky Institute of Microbiology, Federal Research Center of Biotechnology, Russian Academy of Sciences, Moscow, Russia
| | - Evgeny Gruzdev
- K.G. Skryabin Institute of Bioengineering, Federal Research Center of Biotechnology, Russian Academy of Sciences, Moscow, Russia
| | - Yulia Berestovskaya
- Winogradsky Institute of Microbiology, Federal Research Center of Biotechnology, Russian Academy of Sciences, Moscow, Russia
| | - Alexander Dorofeev
- Winogradsky Institute of Microbiology, Federal Research Center of Biotechnology, Russian Academy of Sciences, Moscow, Russia
| | - Yury Nikolaev
- Winogradsky Institute of Microbiology, Federal Research Center of Biotechnology, Russian Academy of Sciences, Moscow, Russia
| | - Anna Kallistova
- Winogradsky Institute of Microbiology, Federal Research Center of Biotechnology, Russian Academy of Sciences, Moscow, Russia
| | - Alexey Beletsky
- K.G. Skryabin Institute of Bioengineering, Federal Research Center of Biotechnology, Russian Academy of Sciences, Moscow, Russia
| | - Nikolai Ravin
- K.G. Skryabin Institute of Bioengineering, Federal Research Center of Biotechnology, Russian Academy of Sciences, Moscow, Russia
| | - Nikolai Pimenov
- Winogradsky Institute of Microbiology, Federal Research Center of Biotechnology, Russian Academy of Sciences, Moscow, Russia
| | - Andrey Mardanov
- K.G. Skryabin Institute of Bioengineering, Federal Research Center of Biotechnology, Russian Academy of Sciences, Moscow, Russia
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18
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Zuo F, Sui Q, Yu D, Gui S, Zhang K, Wei Y. Effective enrichment of anaerobic ammonia oxidation sludge with feast-starvation strategy: activity, sedimentation, growth kinetics, and microbial community. BIORESOURCE TECHNOLOGY 2023; 388:129730. [PMID: 37704089 DOI: 10.1016/j.biortech.2023.129730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 09/01/2023] [Accepted: 09/05/2023] [Indexed: 09/15/2023]
Abstract
To address the issue of floating and loss of floc sludge caused by gas production in anaerobic ammonia oxidation (anammox) reactors, this study proposes a limited nitrite supply strategy to regulate gas production during the settling and enhance sludge retention. Results indicate that the effluent suspended solids in the anammox reactor can be reduced to as low as 0.11 g/L under specific feast-starvation conditions. Even under long-term intermittent nitrite-starvation stress, the maximum growth rate of Candidatus_Kuenenia can still reach 0.085d-1, with its abundance increasing from 0.47% to 8.83% within 69 days. Although the combined effects of starvation and sedimentation would lead to a temporary decrease in anammox activity, this reversible inhibition can be fully restored through substrate intervention. The limited nitrite supply strategy promotes the sedimentation of anammox sludge without significantly affecting its growth rate, and effective sludge retention is crucial for enriching anammox sludge during initial cultivation.
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Affiliation(s)
- Fumin Zuo
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China; Laboratory of Water Pollution Control Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Qianwen Sui
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Laboratory of Water Pollution Control Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Dawei Yu
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Laboratory of Water Pollution Control Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Shuanglin Gui
- Institute of Energy, Jiangxi Academy of Sciences, Nanchang 330096, China
| | - Kai Zhang
- CECEP Engineering Technology Research Institute Co., Ltd., Beijing 100082, China
| | - Yuansong Wei
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China; Laboratory of Water Pollution Control Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Institute of Energy, Jiangxi Academy of Sciences, Nanchang 330096, China.
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19
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Liu Z, Yang R, Zhang D, Wang J, Gao M, Zhang A, Liu W, Liu Y. Insight into the effect of particulate organic matter on sludge granulation at the low organic load: Sludge characteristics, extracellular polymeric substances and microbial communities response. BIORESOURCE TECHNOLOGY 2023; 388:129791. [PMID: 37730138 DOI: 10.1016/j.biortech.2023.129791] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 09/17/2023] [Accepted: 09/17/2023] [Indexed: 09/22/2023]
Abstract
This paper investigated the effect of particulate organic matter (POM) on sludge granulation under low organic load. The results showed that POM promoted the formation of aerobic granular sludge (AGS) with a chemical oxygen demand (COD) fraction of 25%, and POM also enhanced the sludge settleability and biomass retention. However, when the COD fraction of POM increased to 50% and 75%, the AGS performance deteriorated. The analysis of extracellular polymeric substances revealed that the POM (accounted for ≤ 50% of COD in the influent) suppressed the secretion of extracellular protein. Analysis of the microbial community showed that species diversity was lower in the POM-fed system, with Rhodocyclaceae being the predominant bacteria responsible for carbon source degradation. Additionally, molecular ecological network analysis demonstrated that when the COD fraction of the POM exceeded 50%, the connectivity and modularity between microbial species decreased, which may explain the sludge performance deterioration.
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Affiliation(s)
- Zhe Liu
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Yan Ta Road. No.13, Xi'an 710055, China; Key Lab of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an 710055, China; Yulin Ecological Environment Monitoring Station, High-tech Zone Xingda Road, Yulin 719000, China.
| | - Rushuo Yang
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Yan Ta Road. No.13, Xi'an 710055, China
| | - Dan Zhang
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Yan Ta Road. No.13, Xi'an 710055, China
| | - Jiaxuan Wang
- School of Architecture and Civil Engineering, Xi'an University of Science and Technology, Yan Ta Road, No. 58, Xi'an 710054, China
| | - Min Gao
- School of Environmental and Chemical Engineering, Xi an Polytechnic University, Jin Hua Nan Road. No.19, Xi'an 710048, China
| | - Aining Zhang
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Yan Ta Road. No.13, Xi'an 710055, China
| | - Wenlong Liu
- Yulin Ecological Environment Monitoring Station, High-tech Zone Xingda Road, Yulin 719000, China
| | - Yongjun Liu
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Yan Ta Road. No.13, Xi'an 710055, China; Key Lab of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an 710055, China
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20
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Sandeep R, Muscolino JF, Macêdo WV, Piculell M, Christensson M, Poulsen JS, Nielsen JL, Vergeynst L. Effect of biofilm thickness on the activity and community composition of phosphorus accumulating bacteria in a moving bed biofilm reactor. WATER RESEARCH 2023; 245:120599. [PMID: 37717325 DOI: 10.1016/j.watres.2023.120599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 09/01/2023] [Accepted: 09/07/2023] [Indexed: 09/19/2023]
Abstract
Can biofilms enhance the rates of phosphorus removal in wastewater treatment? In order to narrow the scientific gap on the effect of biofilm thickness on the activity and microbial community of phosphorus-accumulating bacteria, this study investigated biofilms of 30 to 1000 µm thickness in a moving bed biofilm reactor. Measurements on 5 different biofilm carriers showed that biomass-specific phosphorus release and uptake rates increased as a function of biofilm thickness for biofilms thinner than about 110 µm but were lower for thicker biofilms of about 550-1000 µm. The reduced phosphorus uptake and release rates in the thickest biofilms can result from substrate mass transfer limitations whereas the low activity in the thinnest biofilms can be related to a too high turnover rate in the biofilm due to heterotrophic growth. Additionally, the microbial ecology of the different biofilms confirms the observed phosphorus uptake and release rates. The results from the full-length 16S rRNA gene sequencing of the bacterial community showed that the thicker biofilms were characterized by higher relative abundance (40-58%) of potential phosphorus accumulating genera Zoogloea, Acinetobacter, Dechloromonas and Ca. Accumulibacter. In contrast, the thinner biofilms were dominated by the genus Ferribacterium (34-60%), which might be competing with phosphorus-accumulating bacteria as indicated by the relatively high acetate uptake rates in the thinner biofilms. It is concluded that there is an optimal biofilm thickness of 100-500 µm, at which the phosphorus accumulating bacteria have the highest activity.
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Affiliation(s)
- Rellegadla Sandeep
- Centre for Water Technology (WATEC), Department of Biological and Chemical Engineering, Aarhus University, Aarhus, Denmark.
| | - Juan Franco Muscolino
- Centre for Water Technology (WATEC), Department of Biological and Chemical Engineering, Aarhus University, Aarhus, Denmark
| | - Williane Vieira Macêdo
- Centre for Water Technology (WATEC), Department of Biological and Chemical Engineering, Aarhus University, Aarhus, Denmark
| | | | | | - Jan Struckmann Poulsen
- Center for Microbial Communities, Department of Chemistry and Bioscience, Aalborg University, Aalborg, Denmark
| | - Jeppe Lund Nielsen
- Center for Microbial Communities, Department of Chemistry and Bioscience, Aalborg University, Aalborg, Denmark
| | - Leendert Vergeynst
- Centre for Water Technology (WATEC), Department of Biological and Chemical Engineering, Aarhus University, Aarhus, Denmark
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21
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Thongsamer T, Vinitnantharat S, Pinisakul A, Werner D. Fixed-bed biofilter for polluted surface water treatment using chitosan impregnated-coconut husk biochar. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 334:122137. [PMID: 37406752 DOI: 10.1016/j.envpol.2023.122137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Revised: 06/25/2023] [Accepted: 07/01/2023] [Indexed: 07/07/2023]
Abstract
Pelletizing biochar enables its use as a biofilter medium for polluted canal water treatment. Coconut husk biochar pellets and their modification with chitosan (CHC) were compared with conventional activated carbon pellets and gravel. The biofilter columns with these media were operated with a hydraulic loading rate of 0.1 m3/m2∙h. CHC showed the highest potential to reduce phosphate and nitrogen, via the adsorption process in the first week of filtration and later enhanced by biodegradation, to achieve removal efficiencies of 61.70 and 54.37% for these two key nutrients, respectively, over five weeks of biofilter operation. The predominant bacteria in the biofilter communities were characterized at the end of the experiments by next generation sequencing and quantitative polymerase chain reaction analysis. The biofilter communities included ammonium oxidizing, nitrite oxidizing, denitrifying, polyphosphate accumulating and denitrifying phosphate-accumulating bacteria that benefit nutrient removal. The CHC biofilter also effectively removed micropollutants, including pharmaceuticals.
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Affiliation(s)
- Thunchanok Thongsamer
- Environmental Technology Program in School of Energy, Environment and Materials, King Mongkut's University of Technology Thonburi, Bangkok, 10140, Thailand
| | - Soydoa Vinitnantharat
- Environmental Technology Program in School of Energy, Environment and Materials, King Mongkut's University of Technology Thonburi, Bangkok, 10140, Thailand; Environmental and Energy Management for Community and Circular Economy Research Group, King Mongkut's University of Technology Thonburi, Bangkok, 10140, Thailand
| | - Anawat Pinisakul
- Chemistry for Green Society and Healthy Research Group, Department of Chemistry, Faculty of Science, King Mongkut's University of Technology Thonburi, Bangkok, 10140, Thailand.
| | - David Werner
- School of Engineering, Newcastle University, Newcastle Upon Tyne, NE1 7RU, United Kingdom
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22
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Fu Y, Xu R, Yang B, Wu Y, Xia L, Tawfik A, Meng F. Mediation of Bacterial Interactions via a Novel Membrane-Based Segregator to Enhance Biological Nitrogen Removal. Appl Environ Microbiol 2023; 89:e0070923. [PMID: 37404187 PMCID: PMC10370321 DOI: 10.1128/aem.00709-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Accepted: 06/12/2023] [Indexed: 07/06/2023] Open
Abstract
The regulation of microbial subpopulations in wastewater treatment plants (WWTPs) with desired functions can guarantee nutrient removal. In nature, "good fences make good neighbors," which can be applied to engineering microbial consortia. Herein, a membrane-based segregator (MBSR) was proposed, where porous membranes not only promote the diffusion of metabolic products but also isolate incompatible microbes. The MBSR was integrated with an anoxic/aerobic membrane bioreactor (i.e., an experimental MBR). The long-term operation showed that the experimental MBR exhibited higher nitrogen removal (10.45 ± 2.73 mg/L total nitrogen) than the control MBR (21.68 ± 4.23 mg/L) in the effluent. The MBSR resulted in much lower oxygen reduction potential in the anoxic tank of the experimental MBR (-82.00 mV) compared to that of the control MBR (83.25 mV). The lower oxygen reduction potential can inevitably aid in the occurrence of denitrification. The 16S rRNA sequencing showed that the MBSR significantly enriched acidogenic consortia, which yielded considerable volatile fatty acids by fermenting the added carbon sources and allowed efficient transfer of these small molecules to the denitrifying community. Moreover, the sludge communities of the experimental MBR harbored a higher abundance of denitrifying bacteria than those of the control MBR. Metagenomic analysis further corroborated these sequencing results. The spatially structured microbial communities in the experimental MBR system demonstrate the practicability of the MBSR, achieving nitrogen removal efficiency superior to that of mixed populations. Our study provides an engineering method for modulating the assembly and metabolic division of labor of subpopulations in WWTPs. IMPORTANCE This study provides an innovative and applicable method for regulating subpopulations (activated sludge and acidogenic consortia), which contributes to the precise control of the metabolic division of labor in biological wastewater treatment processes.
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Affiliation(s)
- Yue Fu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, PR China
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou, PR China
| | - Ronghua Xu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, PR China
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou, PR China
| | - Boyi Yang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, PR China
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou, PR China
| | - Yingxin Wu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, PR China
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou, PR China
| | - Lichao Xia
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, PR China
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou, PR China
| | - Ahmed Tawfik
- National Research Centre, Water Pollution Research Department, Dokki, Cairo, Egypt
| | - Fangang Meng
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, PR China
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou, PR China
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23
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Li C, Du X, Huang C, Zhang Z. Effects of High Pharmaceutical Concentrations in Domestic Wastewater on Membrane Bioreactor Treatment Systems: Performance and Microbial Community. MEMBRANES 2023; 13:650. [PMID: 37505016 PMCID: PMC10383461 DOI: 10.3390/membranes13070650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 07/01/2023] [Accepted: 07/04/2023] [Indexed: 07/29/2023]
Abstract
Despite pharmaceuticals being widely detected in water-bodies worldwide, what remain unclear are the effects of high pharmaceutical concentrations on the treatment efficiency of biological wastewater treatment processes, such as membrane bioreactor (MBR) systems. This study investigated the efficiency of MBR technology in the treatment of synthetic wastewater containing a mixture of five typical pharmaceuticals (ofloxacin, sulfamethoxazole, sulfamethylthiadiazole, carbamazepine and naproxen) with a total concentration of 500 µg/L. Both the control MBR (MBRc) without pharmaceutical dosing and the MBR operated with high influent pharmaceutical concentrations (MBRe) were operated under room temperature with the same hydraulic retention time of 11 h and the same sludge retention time of 30 d. The removal efficiency rates of total nitrogen and total phosphorus were 83.2% vs. 90.1% and 72.6% vs. 57.8% in the MBRc vs. MBRe systems, and both MBRs achieved >98% removal of organics for a 180-day period. The floc size decreased, and membrane fouling became more severe in the MBRe system. Microbial diversity increased in the MBRe system and the relative abundances of functional microbe differed between the two MBRs. Furthermore, the total relative abundances of genes involved in glycolysis, assimilating nitrate reduction and nitrification processes increased in the MBRe system, which could account for the higher organics and nitrogen removal performance. This work provides insights for MBR operation in wastewater treatment with high pharmaceutical concentrations.
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Affiliation(s)
- Chengyue Li
- Membrane & Nanotechnology-Enabled Water Treatment Center, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
- Guangdong Provincial Engineering Research Centre for Urban Water Recycling and Environmental Safety, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Xin Du
- Membrane & Nanotechnology-Enabled Water Treatment Center, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
- Guangdong Provincial Engineering Research Centre for Urban Water Recycling and Environmental Safety, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Chuyi Huang
- Membrane & Nanotechnology-Enabled Water Treatment Center, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
- Guangdong Provincial Engineering Research Centre for Urban Water Recycling and Environmental Safety, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Zhenghua Zhang
- Membrane & Nanotechnology-Enabled Water Treatment Center, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
- Guangdong Provincial Engineering Research Centre for Urban Water Recycling and Environmental Safety, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
- School of Environment, Tsinghua University, Beijing 100084, China
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24
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Yao K, Huang X, Dong W, Wang F, Liu X, Yan Y, Qu Y, Fu Y. Changes of nitrogen and phosphorus removal pattern caused by alternating aerobic/anoxia from the perspective of microbial characteristics. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:68863-68876. [PMID: 37129825 DOI: 10.1007/s11356-023-27302-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Accepted: 04/25/2023] [Indexed: 05/03/2023]
Abstract
The purpose of this study was to compare the impact of different numbers of alternating aerobic/anoxic (A/O) cycles on pollutant removal. Three sequential batch reactors (SBRs) with varying numbers of alternating A/O cycles were established. Under the tertiary anoxic operating conditions, the removal efficiencies of chemical oxygen demand (COD), ammonia nitrogen (NH4+-N), total nitrogen (TN), and total phosphorus (TP) were 88.73%, 89.56%, 72.15%, and 77.61%, respectively. Besides, alternating A/O affected the dominant microbial community relative abundance (Proteobacteria and Bacteroidetes) and increased microbial richness and diversity. It also increased the relative abundance of aerobic denitrifying, heterotrophic nitrifying, and denitrifying phosphorus removal bacteria to change N and P removal patterns. Furthermore, the abundance of carbohydrate metabolism and amino acid metabolism was improved by alternating A/O to improve organic matter and TN removal.
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Affiliation(s)
- Kai Yao
- Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing, 210044, China
| | - Xiao Huang
- Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing, 210044, China.
- Shenzhen Key Laboratory of Water Resources Utilization and Environmental Pollution Control, School of Civil and Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China.
| | - Wenyi Dong
- Shenzhen Key Laboratory of Water Resources Utilization and Environmental Pollution Control, School of Civil and Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China
| | - Fupeng Wang
- Northeast China Municipal Engineering Design and Research Institute Co. Ltd, Jilin, 130021, China
| | - Xueyong Liu
- Northeast China Municipal Engineering Design and Research Institute Co. Ltd, Jilin, 130021, China
- Urban and Rural Water Environment Technology R&D Center, China Communications Construction Co. Ltd, Jilin, 130021, China
| | - Yu Yan
- Northeast China Municipal Engineering Design and Research Institute Co. Ltd, Jilin, 130021, China
- Urban and Rural Water Environment Technology R&D Center, China Communications Construction Co. Ltd, Jilin, 130021, China
| | - Yanhui Qu
- China Urban and Rural Holdings Group Co. Ltd, Beijing, 100029, China
| | - Yicheng Fu
- State Key Laboratory of Simulation and Regulation of River Basin Water Cycle, China Institute of Water Resources and Hydropower Research, Beijing, 100038, China
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25
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Zhang X, Liu S, Sun H, Huang K, Ye L. Impact of different organic matters on the occurrence of antibiotic resistance genes in activated sludge. J Environ Sci (China) 2023; 127:273-283. [PMID: 36522059 DOI: 10.1016/j.jes.2022.04.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 04/18/2022] [Accepted: 04/19/2022] [Indexed: 06/17/2023]
Abstract
The occurrence of antibiotic resistance genes (ARGs) in various environments has drawn worldwide attention due to their potential risks. Previous studies have reported that a variety of substances can enhance the occurrence and dissemination of ARGs. However, few studies have compared the response of ARGs under the stress of different organic matters in biological wastewater treatment systems. In this study, seven organic pollutants were added into wastewater treatment bioreactors to investigate their impacts on the ARG occurrence in activated sludge. Based on high-throughput sequencing, it was found that the microbial communities and ARG patterns were significantly changed in the activated sludge exposed to these organic pollutants. Compared with the non-antibiotic refractory organic matters, antibiotics not only increased the abundance of ARGs but also significantly changed the ARG compositions. The increase of Gram-negative bacteria (e.g., Archangium, Prosthecobacter and Dokdonella) carrying ARGs could be the main cause of ARG proliferation. In addition, significant co-occurrence relationships between ARGs and mobile genetic elements were also observed in the sludge samples, which may also affect the ARG diversity and abundance during the organic matter treatment in the bioreactors. Overall, these findings provide new information for better understanding the ARG occurrence and dissemination caused by organic pollutants in wastewater treatment systems.
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Affiliation(s)
- Xiuwen Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Suwan Liu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Haohao Sun
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Kailong Huang
- Nanjing Jiangdao Institute of Environmental Research Co., Ltd., Nanjing 210019, China
| | - Lin Ye
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China.
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26
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Wang X, Shi C, Pan W, Lu H, Zhang X. Variation in the quantity and composition of phosphorus accumulating organisms in activated sludge driven by nitrate-nitrogen. KOREAN J CHEM ENG 2023. [DOI: 10.1007/s11814-022-1349-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/15/2023]
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27
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Zhang L, Huang X, Fu G, Zhang Z. Aerobic electrotrophic denitrification coupled with biologically induced phosphate precipitation for nitrogen and phosphorus removal from high-salinity wastewater: Performance, mechanism, and microbial community. BIORESOURCE TECHNOLOGY 2023; 372:128696. [PMID: 36731615 DOI: 10.1016/j.biortech.2023.128696] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 01/23/2023] [Accepted: 01/28/2023] [Indexed: 06/18/2023]
Abstract
Electrotrophic denitrification (ED) is a promising nitrogen removal technique; however, the potential of ED coupled with biologically induced phosphate precipitation (BIPP) has not been fully explored. In this study, the performances, mechanisms, and microbial communities of the coupled system were investigated. The results showed that excellent nitrogen and phosphorus removal (both exceeding 92 %) was achieved in the salinity range of 20-60 g/L. ED contributed to approximately 83.4 % of nitrogen removal. BIPP removed approximately 63.5 % of the phosphorus. Batch activity tests confirmed that aerobic/anoxic bio-electrochemical and autotrophic/heterotrophic denitrification worked together for nitrate removal. Sulfate reduction had a negative impact on denitrification. Moreover, phosphorus removal was controlled by ED and calcium ions. The alkaline solution environment created by denitrification may greatly promote the formation of hydroxyapatite. Microbial community analyses indicated that the key bacteria involved in aerobic ED was Arcobacter. These findings will aid in the advanced treatment of high-salinity wastewater.
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Affiliation(s)
- Linfang Zhang
- College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Xiaodan Huang
- College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Guokai Fu
- College of Environment and Ecology, Chongqing University, Chongqing 400044, China; Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400044, China.
| | - Zhi Zhang
- College of Environment and Ecology, Chongqing University, Chongqing 400044, China; Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400044, China
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28
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Yuan Q, Zhang H, Qin C, Zhang H, Wang D, Zhang Q, Zhang D, Zhao J. Impact of emerging pollutant florfenicol on enhanced biological phosphorus removal process: Focus on reactor performance and related mechanisms. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 859:160316. [PMID: 36403846 DOI: 10.1016/j.scitotenv.2022.160316] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Revised: 11/15/2022] [Accepted: 11/16/2022] [Indexed: 06/16/2023]
Abstract
Florfenicol (FF), an emerging pollutant antibiotic that is difficult to biodegrade, inevitably enters sewage treatment facilities with high level. To date, however, the performance and related mechanism of FF on enhanced biological phosphorus removal (EBPR) have not been reported. In order to fill this gap, this work investigated the potential impacts of FF on EBPR and revealed the relevant mechanisms. The effect of FF on EBPR was dose-dependent, that was, low dose had no effect on EBPR, while high FF concentration inhibited EBPR. Mechanism investigation showed that FF had no effect on anaerobic phosphate release, but reduced oxic phosphorus uptake. Three-dimensional Excitation-emission Matrix fluorescence spectroscopy and X-ray photoelectron spectroscopy analysis showed that FF affected the structure and components of activated sludge extracellular polymers (EPS). High content of FF stimulated sludge to secrete more EPS. High level of FF reduced the relative abundance of microorganisms responsible for biological phosphorus removal. Microbiological community structure analysis indicated 2.0 mg FF/L increased the relative abundance of Candidatus_Competibacter and Terrimonas from 9.22 % and 12.49 % to 19.00 % and 16.28 %, respectively, but significantly reduced the relative abundance of Chinophagaceae from 11.32 % to 0.38 %, compared with the blank.
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Affiliation(s)
- Qingjiang Yuan
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266520, China
| | - Hongying Zhang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266520, China
| | - Chengzhi Qin
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266520, China
| | - Huawei Zhang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266520, China
| | - Dongbo Wang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
| | - Qiuzhuo Zhang
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, Shanghai 200241, China
| | - Dalei Zhang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266520, China
| | - Jianwei Zhao
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266520, China; College of Environmental Science and Engineering, Hunan University, Changsha 410082, China.
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29
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Li S, Guo Y, Zhang X, Feng L, Yong X, Xu J, Liu Y, Huang X. Advanced nitrogen and phosphorus removal by the symbiosis of PAOs, DPAOs and DGAOs in a pilot-scale A 2O/A+MBR process with a low C/N ratio of influent. WATER RESEARCH 2023; 229:119459. [PMID: 36521311 DOI: 10.1016/j.watres.2022.119459] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2022] [Revised: 11/07/2022] [Accepted: 12/03/2022] [Indexed: 06/17/2023]
Abstract
Cooperating in harmony to avoid competition with dominant functional microbial symbiosis is an efficient way in advanced nitrogen and phosphorus removal in wastewater treatment processes. In this study, a niche-based coordinating strategy was implemented to cooperate in harmony with phosphorus-accumulating organisms (PAOs), denitrifying phosphorus-accumulating organisms (DPAOs) and denitrifying glycogen-accumulating organisms (DGAOs) to advance nitrogen and phosphorus removal based on an anaerobic-anoxic-oxic-anoxic-membrane bioreactor (A2O/A+MBR) under low C/N in municipal wastewater influent. The niche-based strategy was conducted based on the ORP change during the process as an indicator combined with the adjustment of recirculation and anoxic zone shifting. The results indicated that the strategy of the post-anoxic unit could enable significant enhancement of biological nitrogen and phosphorus removal (BNPR) by 9.9% and 16.3%, respectively, with low effluent concentrations of 7.0 ± 2.2 mg N/L and 0.36±0.32 mg P/L. The satisfactory performance was dominated along with the shift in the microbial community: the relative abundance of Tetrasphaera (PAO genus) increased from 0.14±0.08% to 0.32±0.12%, while the relative abundance of Decchloromonas (DGAO genus) and Candidatus Competibacter (DGAO genus) also increased. The advanced combination of anaerobic phosphorus release, anoxic denitrification, denitrifying phosphorus removal and endogenous denitrification was qualified by the modeling simulation of the biochemical kinetics mechanism of activated sludge in the A2O+MBR and A2O/A+MBR processes, which means that cooperation in the harmony of PAOs, DPAOs and DGAOs could be efficiently realized by a promising control strategy to enhance BNPR in an A2O+MBR with a post-anoxic unit. This study provides an efficient and simple novel control strategy to overcome the limitation of traditional nitrogen and phosphorus removal under an insufficient carbon source.
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Affiliation(s)
- Siqi Li
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Yu Guo
- Chengdu Xingrong Environment Co., Ltd, Chengdu, 610041, China
| | - Xuan Zhang
- Chengdu Xingrong Environment Co., Ltd, Chengdu, 610041, China
| | - Liang Feng
- Chengdu Drainage Co., Ltd, Chengdu, Chengdu, 610011, China
| | - Xiaolei Yong
- Chengdu Drainage Co., Ltd, Chengdu, Chengdu, 610011, China
| | - Jing Xu
- Chengdu Drainage Co., Ltd, Chengdu, Chengdu, 610011, China
| | - Yanchen Liu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China.
| | - Xia Huang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
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30
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Namaldi O, Azgin ST. Evaluation of the treatment performance and reuse potential in agriculture of organized industrial zone (OIZ) wastewater through an innovative vermifiltration approach. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 327:116865. [PMID: 36450165 DOI: 10.1016/j.jenvman.2022.116865] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 11/01/2022] [Accepted: 11/22/2022] [Indexed: 06/17/2023]
Abstract
Vermifiltration (VF) is a natural and sustainable biofilter that has many advantages, including being energy-free, cost-effective, and allowing ease of application and maintenance. In this study, the effectiveness of a lab-scale VF system was assessed by the removal efficiency of total suspended solids, electrical conductivity, chemical oxygen demand, total nitrogen, total phosphorus, fecal coliform, and heavy metals in organized industrial zones (OIZ) and domestic wastewater (DW) for the first time. Additionally, the reuse suitability of the treated wastewater was determined by comparing different countries' and global irrigational criteria. The lab systems were built with four layers: one worm-bed and three varying filtering materials, and operated at an optimum hydraulic loading rate of 1.8-2 m3/m2/day for 45 days with Eisenia fetida as the earthworm species. The results demonstrated that removal efficiencies of total suspended solids and chemical oxygen demand were found to be 95% and 80% in OIZ wastewater and 90% and 88% in DW, respectively. Total nitrogen and total phosphorus were removed at rates of 69% and 67% in OIZ wastewater, respectively, and 84% and 74% in DW. Besides, the VF system has shown satisfactory removal performance for heavy metals ranging from 51% to 77% in OIZ wastewater that has met Turkish national wastewater discharge limits. Although the final characterization of treated wastewater was suitable, heavy metal and fecal coliform levels have not met many countries' irrigation water quality criteria. To meet global irrigation standards and to enhance the VF performance, further experimental studies should be carried out, including parameters such as bed material type in the reactor, worm type, and different operating conditions.
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Affiliation(s)
- Onur Namaldi
- Department of Environment Engineering, Erciyes University, 38039, Kayseri, Turkey.
| | - Sukru Taner Azgin
- Department of Environment Engineering, Erciyes University, 38039, Kayseri, Turkey; Energy Conversions Research and Application Center, Erciyes University, 38039, Kayseri, Turkey.
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31
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Sun Z, Zhang J, Wang J, Zhu H, Xiong J, Nong G, Luo M, Wang J. Direct start-up of aerobic granular sludge system with dewatered sludge granular particles as inoculant. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 326:116540. [PMID: 36427360 DOI: 10.1016/j.jenvman.2022.116540] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 10/11/2022] [Accepted: 10/13/2022] [Indexed: 06/16/2023]
Abstract
Aerobic granular sludge (AGS) is a promising technology for engineering applications in the biological treatment of sewage. New objective is to skip the conventional granulation step to integrate it into a continuous-flow reactor directly. This study proposed a method for integrating spherical pelletizing granular sludge (SPGS) into a new patented aerobic granular sludge bed (AGSB), a continuous up-flow reactor. AGSB system could be startup directly, and after 120 days of operation, the SPGS maintained a relatively intact spherical structure and stability. With an initial high chemical oxygen demand (COD) volume loading of over 2.0 kg/(m3·d), this system achieved the desired effect as the same as a mature AGS system. The final mixed liquid suspended solids, and the ratio of 30 min-5 min sludge volume index (SVI30/SVI5) were 20,000 mg/L, and 0.84, respectively. Although hydraulic elution and filamentous bacteria (FBs) had a slightly negative impact on initial phase pollutant removal, the final removal rates for COD, total nitrogen (TN), ammonia nitrogen (NH4+-H), and total phosphorus (TP) were 90%, 70%, 95%, and 85%, respectively. The presence of specific functional microorganisms promoted the secretion of extracellular polymeric substances (EPS), from 90.65 to 209.78 mg/gVSS. The maturation process of SPGS altered the microbial community structures and reduced the species abundance of microbes in sludge.
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Affiliation(s)
- Zhuo Sun
- School of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, People's Republic of China; Branch Graduate School of Guangxi Bossco Environmental Protection Technology Co., Ltd, Guangxi University, Nanning, 530007, People's Republic of China
| | - Jiaming Zhang
- School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, People's Republic of China
| | - Jin Wang
- Department of Landscape Architecture, School of Design, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China.
| | - Hongxiang Zhu
- School of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, People's Republic of China.
| | - Jianhua Xiong
- School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, People's Republic of China
| | - Guoyou Nong
- School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, People's Republic of China
| | - Mengqi Luo
- Guangxi Bossco Environmental Protection Technology Co., Ltd., Nanning, 530007, People's Republic of China
| | - Jue Wang
- School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, People's Republic of China
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32
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Feng Y, Wang S, Peng Y. Stable nitrogen removal in the novel continuous flow anammox system under deteriorated partial nitrification: Significance and superiority of the anaerobic-oxic-anoxic-oxic operation mode. BIORESOURCE TECHNOLOGY 2022; 361:127693. [PMID: 35905875 DOI: 10.1016/j.biortech.2022.127693] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Revised: 07/20/2022] [Accepted: 07/21/2022] [Indexed: 06/15/2023]
Abstract
The collapse of mainstream anammox system caused by deterioration of partial nitrification (PN) is easy to occur and it is vital to quickly restore the stable nitrogen elimination performance. Herein, a novel continuous push-flow anaerobic-oxic-anoxic-oxic (AOAO) process treating sewage was used to restore the nitrogen elimination performance rapidly under deteriorated PN. The increased abundances of Nitrospira and Candidatus Nitrotoga was responsible for the deterioration of PN. Effluent total inorganic nitrogen of 8.7 mg N/L and a stable nitrogen removal rate of 0.083 kg N/m3·d were obtained with the aerobic hydraulic retention time (HRT) of 3.75 h even PN deteriorated. Endogenous partial denitrification coupled anammox in the anoxic zone was essential to maintain stable nitrogen removal under the deterioration of PN and the anammox contribution increased from 17.2 % to 23.6 %. The AOAO system shows robustness on nitrogen removal even PN deteriorated under the decrease of HRT from 16 to 12 h.
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Affiliation(s)
- Yan Feng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Shuying Wang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Yongzhen Peng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
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33
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Dai H, Sun Y, Wan D, Abbasi HN, Guo Z, Geng H, Wang X, Chen Y. Simultaneous denitrification and phosphorus removal: A review on the functional strains and activated sludge processes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 835:155409. [PMID: 35469879 DOI: 10.1016/j.scitotenv.2022.155409] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 04/15/2022] [Accepted: 04/16/2022] [Indexed: 06/14/2023]
Abstract
Eutrophication has attracted extensive attention owing to its harmful effects to the organisms and aquatic environment. Studies on the functional microorganisms with the ability of simultaneously nitrogen (N) and phosphorus (P) removal is of great significance for alleviating eutrophication. Thus far, several strains from various genera have been reported to accomplish simultaneous N and P removal, which is primarily observed in Bacillus, Pseudomonas, Paracoccus, and Arthrobacter. The mechanism of N and P removal by denitrifying P accumulating organisms (DPAOs) is different from the traditional biological N and P removal. The denitrifying P removal (DPR) technology based on the metabolic function of DPAOs can overcome the problem of carbon source competition and sludge age contradiction in traditional biological N and P removal processes and can be applied to the treatment of urban sewage with low C/N ratio. This paper reviews the mechanism of N and P removal by DPAOs from the aspect of the metabolic pathways and enzymatic processes. The research progress on DPR processes is also summarized and elucidated. Further research should focus on the efficient removal of N and P by improving the performance of functional microorganisms and development of new coupling processes. This review can serve as a basis for screening DPAOs with high N and P removal efficiency and developing new DPR processes in the future.
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Affiliation(s)
- Hongliang Dai
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China; School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, China
| | - Yang Sun
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China
| | - Dong Wan
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, China
| | - Haq Nawaz Abbasi
- Department of Environmental science, Federal Urdu University of Arts, Science and Technology, Karachi, Pakistan
| | - Zechong Guo
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China; School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, China
| | - Hongya Geng
- Department of Materials, Imperial College London, Prince Consort Road, London SW7 2AZ, UK
| | - Xingang Wang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China.
| | - Yong Chen
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, China
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34
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Papp LA, Cardinali-Rezende J, de Souza Júdice WA, Sanchez MB, Araújo WL. Low biological phosphorus removal from effluents treated by slow sand filters. Appl Microbiol Biotechnol 2022; 106:5797-5809. [PMID: 35930038 DOI: 10.1007/s00253-022-12077-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 07/01/2022] [Accepted: 07/11/2022] [Indexed: 11/02/2022]
Abstract
The legislation for environment protection requires strict controls of the wastewater releasing in water bodies. The wastewater treatment plants (WWTP) have been used for organic matter degradation; however, the residual total phosphorus (TP) removal has not been efficient. TP and nitrogen present in wastewater are associated to eutrophication of water bodies and algae growth. Therefore, this study discusses the efficiency of phosphorus removal by a slow filter (SF), complementary to a WWTP and the microbial community involved. The results showed that the use of SF, with or without macrophytes, is not suitable to remove TP. Spatial variation in microbial communities distributed in three distinct zones was identified in the SF. Proteobacteria, Bacteroidetes, Chloroflexi and Firmicutes covered the hydrolytic and fermentative bacteria. The acetogenesis, nitrification, and denitrification, as well as the removal of phosphorus from the effluent, were performed by representatives affiliated to different groups. Alphaproteobacteria, Betaproteobacteria, and Gammaproteobacteria among these, Dokdonella sp., Frateuria sp., Comamonas sp., Diaphorobacter sp., Nitrosospira sp., Ferruginibacter sp., Flavobacterium sp., and the uncultured OD1 were the most abundant bacteria in the SF. The low efficiency for TP removing from SF effluents can be explained by the low abundance of phosphorus accumulating organisms (PAOs), with the association of the low concentration of biodegradable organic matter in the inlet effluent. Therefore, the alternative to using SF as a complement to WWTPs, as recommended by some Brazilian environmental agencies, did not prove to be viable and new approaches must be evaluated. KEY POINTS: • The phosphorus removal was performed by a slow filter system in a WWTP but obtained a low efficiency. • Microbial spatial variation was distributed into distinct zones from slow filter. • Low abundance of PAOs was observed due to the low availability of organic matter.
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Affiliation(s)
- Luiz Antonio Papp
- ICB, Integrated Center of Biotechnology, University of Mogi das Cruzes, Dr. Cândido Xavier de Almeida e Souza avenue, 200, Mogi das Cruzes, SP, cep 08780-911, Brazil
| | - Juliana Cardinali-Rezende
- CCNH, Center for Natural and Human Science, Federal University of ABC, Estados avenue, 5001, Santo André, SP, cep 09210-580, Brazil.,LABMEM/NAP-BIOP, Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, Prof. Lineu Prestes Avenue, 1374, SP, cep 05508-900, São Paulo, Brazil
| | - Wagner Alves de Souza Júdice
- ICBR, Interdisciplinary Center for Biochemical Research, University of Mogi das Cruzes, Dr. Cândido Xavier de Almeida e Souza Avenue, 200, Mogi das Cruzes, SP, cep 08780-911, Brazil
| | - Marília Bixilia Sanchez
- LABMEM/NAP-BIOP, Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, Prof. Lineu Prestes Avenue, 1374, SP, cep 05508-900, São Paulo, Brazil.,Distrito Industrial - Av. João XXIII, 1160c - Cezar de Souza, Mogi das Cruzes, 08830-000, Brazil
| | - Welington Luiz Araújo
- LABMEM/NAP-BIOP, Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, Prof. Lineu Prestes Avenue, 1374, SP, cep 05508-900, São Paulo, Brazil.
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35
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Yan L, Zheng Y, Chen W, Liu S, Yin M, Jiang J, Yang M. Step feed mode synergistic mixed carbon source to improve sequencing batch reactor simultaneous nitrification and denitrification efficiency of domestic wastewater treatment. BIORESOURCE TECHNOLOGY 2022; 358:127440. [PMID: 35680088 DOI: 10.1016/j.biortech.2022.127440] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 06/03/2022] [Accepted: 06/05/2022] [Indexed: 06/15/2023]
Abstract
The limited efficiency of nitrogen removal has traditionally hindered wide application of simultaneous nitrification and denitrification (SND) technology. Here, the nitrogen removal characteristics of a sequencing batch reactor were studied by adopting a strategy of a step-feeding mode, synergistic regional oxygen limitation, and a mixed carbon source. The changes of the microbial population succession and nitrogen metabolism functional genes were analyzed. This strategy provided a favorable level of dissolved oxygen and continuous carbon sources for driving the denitrification process. The total nitrogen removal efficiency and SND rate reached 92.60% and 96.49%, respectively, by regulating the ratio of sodium acetate to starch in the step feed to 5:1. This procedure increased the relative abundance of denitrifying functional genes and induced the growth of a variety of traditional denitrifying bacteria and aerobic denitrifying bacteria participating in the process of nitrogen removal. Overall, this work offers a new strategy for achieving efficient SND.
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Affiliation(s)
- Lilong Yan
- College of Resource and Environment, Northeast Agricultural University, Harbin 150030 China.
| | - Yaoqi Zheng
- College of Resource and Environment, Northeast Agricultural University, Harbin 150030 China
| | - Wanting Chen
- College of Resource and Environment, Northeast Agricultural University, Harbin 150030 China
| | - Shuang Liu
- College of Resource and Environment, Northeast Agricultural University, Harbin 150030 China
| | - Mingyue Yin
- College of Resource and Environment, Northeast Agricultural University, Harbin 150030 China
| | - Jishuang Jiang
- College of Resource and Environment, Northeast Agricultural University, Harbin 150030 China
| | - Mengya Yang
- College of Resource and Environment, Northeast Agricultural University, Harbin 150030 China
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36
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Zahed MA, Salehi S, Tabari Y, Farraji H, Ataei-Kachooei S, Zinatizadeh AA, Kamali N, Mahjouri M. Phosphorus removal and recovery: state of the science and challenges. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:58561-58589. [PMID: 35780273 DOI: 10.1007/s11356-022-21637-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Accepted: 06/20/2022] [Indexed: 06/15/2023]
Abstract
Phosphorus is one of the main nutrients required for all life. Phosphorus as phosphate form plays an important role in different cellular processes. Entrance of phosphorus in the environment leads to serious ecological problems including water quality problems and soil pollution. Furthermore, it may cause eutrophication as well as harmful algae blooms (HABs) in aquatic environments. Several physical, chemical, and biological methods have been presented for phosphorus removal and recovery. In this review, there is an overview of phosphorus role in nature provided, available removal processes are discussed, and each of them is explained in detail. Chemical precipitation, ion exchange, membrane separation, and adsorption can be listed as the most used methods. Identifying advantages of these technologies will allow the performance of phosphorus removal systems to be updated, optimized, evaluate the treatment cost and benefits, and support select directions for further action. Two main applications of biochar and nanoscale materials are recommended.
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Affiliation(s)
| | - Samira Salehi
- Department of Health, Safety and Environment, Petropars Company, Tehran, Iran.
| | - Yasaman Tabari
- Faculty of Sciences and Advanced Technologies, Science and Culture University, Tehran, Iran
| | - Hossein Farraji
- School of Physical and Chemical Sciences, University of Canterbury, Christchurch, New Zealand
| | | | - Ali Akbar Zinatizadeh
- Faculty of Chemistry, Department of Applied Chemistry, Environmental Research Center (ERC), Razi University, Kermanshah, 67144-14971, Iran
- Department of Environmental Sciences, College of Agriculture and Environmental Sciences, University of South Africa, P.O. Box 392, Florida, 1710, South Africa
| | - Nima Kamali
- Faculty of Civil and Environmental Engineering, Tarbiat Modares University, Tehran, Iran
| | - Mohammad Mahjouri
- Department of Environmental Engineering, University of Tehran, Kish International Campus, Tehran, Iran
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37
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Feng Y, Luo S, Zhang Y, Wang S, Peng Y. Enhanced nutrient removal from mainstream sewage via denitrifying dephosphatation, endogenous denitrification and anammox in a novel continuous flow process. BIORESOURCE TECHNOLOGY 2022; 351:127003. [PMID: 35301084 DOI: 10.1016/j.biortech.2022.127003] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 03/01/2022] [Accepted: 03/10/2022] [Indexed: 06/14/2023]
Abstract
It is a challenging subject to realize nitrogen and phosphorus elimination synchronously from limited-carbon sewage through conventional biological processes. Herein, a novel continuous flow anaerobic/oxic/anoxic/oxic (AOA-O) process, which integrated denitrifying dephosphatation, endogenous denitrification and anammox in the anoxic zone, was developed to enhance nutrient elimination from low carbon/nitrogen sewage (3.4 in average). After the long-term operation (280 days), a satisfactory nutrient removal performance (effluent PO43--P: 0.2 mg P/L, total inorganic nitrogen (TIN):8.9 mg N/L) was obtained. Mass balance indicated that anammox contributed to 26.1% TIN removal and denitrifying dephosphatation contributed to 25.6% phosphorus removal, respectively. The cooperation of anammox bacteria retained in biofilms and endogenous denitrifying bacteria in flocculent sludge was responsible for the enhanced nutrient removal in the anoxic zone. Dechloromonas carried out phosphorus uptake both under oxic conditions and anoxic conditions. This study can broaden the application prospect of mainstream anammox.
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Affiliation(s)
- Yan Feng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Shaoping Luo
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Yingxin Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Shuying Wang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Yongzhen Peng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
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38
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Liu C, Huang G, Song P, An C, Zhang P, Shen J, Ren S, Zhao K, Huang W, Xu Y, Zheng R. Treatment of decentralized low-strength livestock wastewater using microcurrent-assisted multi-soil-layering systems: performance assessment and microbial analysis. CHEMOSPHERE 2022; 294:133536. [PMID: 34999101 DOI: 10.1016/j.chemosphere.2022.133536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 12/28/2021] [Accepted: 01/03/2022] [Indexed: 06/14/2023]
Abstract
Discharge of decentralized livestock wastewater without effective treatment has become a common problem in rural areas, threatening the regional water environment. A new microcurrent-assisted multi-soil-layering (MSL) system was developed for treating rural decentralized livestock wastewater. The results showed the highest removal rates of chemical oxygen demand (COD) and total phosphorus (TP) in MSL systems reached 95.45% and 92.0%, respectively. The removal rate of total nitrogen (TN) in MSL systems ranged from 60 to 75%. The bacterial diversity changes among MSL systems showed that high-level height of bottom submergence had a positive effect on the abundance of denitrifying bacteria, while low-level height of bottom submergence had a positive impact on the abundance of nitrifying bacteria. The effect of low-level external voltage on bacterial abundance was better than that of high-level external voltage. Both high- and low-level influent C/N ratios had no significant effect on bacterial abundance. The metabolism and activity of microorganisms were promoted with microcurrent stimulation from the perspective of increased bacterial abundance in MSL systems with improved treatment performance.
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Affiliation(s)
- Chao Liu
- MOE Key Laboratory of Resources and Environmental Systems Optimization, North China Electric Power University, Beijing, 102206, China
| | - Guohe Huang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, China-Canada Center for Energy, Environment and Ecology Research, UR-BNU, School of Environment, Beijing Normal University, Beijing, 100875, China; Environmental Systems Engineering Program, University of Regina, Regina, S4S 0A2, Canada.
| | - Pei Song
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China
| | - Chunjiang An
- Department of Building, Civil and Environmental Engineering, Concordia University, Montreal, H3G 1M8, Canada
| | - Peng Zhang
- Environmental Systems Engineering Program, University of Regina, Regina, S4S 0A2, Canada
| | - Jian Shen
- Environmental Systems Engineering Program, University of Regina, Regina, S4S 0A2, Canada
| | - Shaojie Ren
- China-Canada Center of Energy, Environment and Sustainability Research, UR-SDU, School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China
| | - Kai Zhao
- Environmental Systems Engineering Program, University of Regina, Regina, S4S 0A2, Canada
| | - Wendy Huang
- Department of Civil Engineering, Schulich School of Engineering, University of Calgary, Calgary, T2N 1N4, Canada
| | - Ye Xu
- MOE Key Laboratory of Resources and Environmental Systems Optimization, North China Electric Power University, Beijing, 102206, China
| | - Rubing Zheng
- MOE Key Laboratory of Resources and Environmental Systems Optimization, North China Electric Power University, Beijing, 102206, China
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39
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He Y, Song Z, Dong X, Zheng Q, Peng X, Jia X. Candida tropicalis prompted effectively simultaneous removal of carbon, nitrogen and phosphorus in activated sludge reactor: Microbial community succession and functional characteristics. BIORESOURCE TECHNOLOGY 2022; 348:126820. [PMID: 35134527 DOI: 10.1016/j.biortech.2022.126820] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 02/01/2022] [Accepted: 02/02/2022] [Indexed: 06/14/2023]
Abstract
A new Candida tropicalis that simultaneously remove nitrogen and phosphorus, and degrade organic matters was isolated. Three continuous stirred tank reactors inoculated with C. tropicalis, activated sludge, and their co-existing system in aerobic condition were operated for 150 days. Results demonstrated that the inoculation of C. tropicalis in the co-existing system remarkably improved the carbon, nitrogen, and phosphorus removal efficiencies. The co-existing system had increased carbon, nitrogen, and phosphorus removal efficiencies (92%, 73%, and 63%, respectively); decreased biomass (reduced from 1200 mg/L to 500 mg/L); and C. tropicalis as the dominant strain. The relative abundance of traditional nitrogen- and phosphorus-removing microorganisms, such as Mycobacterium, Flavonifactor, and Devsia, increased in the co-existing system. Metagenomic analysis showed that the presence of the PCYT2, EPT1, and phnPP genes and more complexed metabolism pathways in the co-existing system might be responsible for the more activated metabolism process.
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Affiliation(s)
- Yuzhe He
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
| | - Zhaohong Song
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
| | - Xiaoqi Dong
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
| | - Qihang Zheng
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
| | - Xingxing Peng
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China.
| | - Xiaoshan Jia
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China.
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40
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Zhang Y, Zhang Q, Peng H, Wei H, Feng J, Su J, He J. An attempt to stimulate aniline degrading bioreactor by exogenous auto-inducer: Decontamination performance, sludge characteristics, and microbial community structure response. BIORESOURCE TECHNOLOGY 2022; 347:126675. [PMID: 35007739 DOI: 10.1016/j.biortech.2022.126675] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 12/29/2021] [Accepted: 01/01/2022] [Indexed: 06/14/2023]
Abstract
To break the contradiction between aniline and nitrogen metabolism in activated sludge reactor by influencing microbial interspecific communication, Auto-inducer C6-HSL and 3-oxo-C8-HSL were selected in this study to interfere with aniline degradation system. The two Auto-inducers enhanced the aniline degradation rate and ammonia removal efficiency of the systems, especially C6-HSL. Meanwhile, the main ammonia removal way was assimilation. Exogenous Auto-inducer effectively stabilized the sludge structure and activity from the destruction of aniline, and promoted EPS secretion. Microbial diversity analysis showed that most of functional microflora of seed sludge gradually deactivated with the operation of the reactor, while Rhodococcus, Leucobacter, g_norank_f_Saprospiraceae proliferated wildly under the action of Auto-inducer. Additionally, the interspecific relationship also demonstrated a different trend. Exogenous Auto-inducer was proved to exert positive effects on aniline degradation system to a certain extent, providing new insights in the field of aniline wastewater bio-degradation.
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Affiliation(s)
- Yunjie Zhang
- School of Civil Engineering & Architecture, Wuhan University of Technology, Wuhan 430070, PR China
| | - Qian Zhang
- School of Civil Engineering & Architecture, Wuhan University of Technology, Wuhan 430070, PR China.
| | - Haojin Peng
- School of Civil Engineering & Architecture, Wuhan University of Technology, Wuhan 430070, PR China
| | - Hua Wei
- School of Civil Engineering & Architecture, Wuhan University of Technology, Wuhan 430070, PR China
| | - Jiapeng Feng
- School of Civil Engineering & Architecture, Wuhan University of Technology, Wuhan 430070, PR China
| | - Junhao Su
- School of Civil Engineering & Architecture, Wuhan University of Technology, Wuhan 430070, PR China
| | - Jing He
- School of Civil Engineering & Architecture, Wuhan University of Technology, Wuhan 430070, PR China
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41
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Repurposing anaerobic digestate for economical biomanufacturing and water recovery. Appl Microbiol Biotechnol 2022; 106:1419-1434. [PMID: 35122155 DOI: 10.1007/s00253-022-11804-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 01/18/2022] [Accepted: 01/23/2022] [Indexed: 11/02/2022]
Abstract
Due to mounting impacts of climate change, particularly increased incidence of drought, hence water scarcity, it has become imperative to develop new technologies for recovering water from nutrient-rich, water-replete effluents other than sewage. Notably, anaerobic digestate could be harnessed for the purpose of water recovery by repurposing digestate-borne minerals as nutrients in fermentative processes. The high concentrations of ammonium, phosphate, sulfate, and metals in anaerobic digestate are veritable microbial nutrients that could be harnessed for bio-production of bulk and specialty chemicals. Tethering nutrient sequestration from anaerobic digestate to bio-product accumulation offers promise for concomitant water recovery, bio-chemical production, and possible phosphate recovery. In this review, we explore the potential of anaerobic digestate as a nutrient source and as a buffering agent in fermentative production of glutamine, glutamate, fumarate, lactate, and succinate. Additionally, we discuss the potential of synthetic biology as a tool for enhancing nutrient removal from anaerobic digestate and for expanding the range of products derivable from digestate-based fermentations. Strategies that harness the nutrients in anaerobic digestate with bio-product accumulation and water recovery could have far-reaching implications on sustainable management of nutrient-rich manure, tannery, and fish processing effluents that also contain high amounts of water. KEY POINTS: • Anaerobic digestate may serve as a source of nutrients in fermentation. • Use of digestate in fermentation would lead to the recovery of valuable water.
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42
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Liu Z, Zhang X, Zhang S, Qi H, Hou Y, Gao M, Wang J, Zhang A, Chen Y, Liu Y. A comparison between exogenous carriers enhanced aerobic granulation under low organic loading in the aspect of sludge characteristics, extracellular polymeric substances and microbial communities. BIORESOURCE TECHNOLOGY 2022; 346:126567. [PMID: 34923077 DOI: 10.1016/j.biortech.2021.126567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 12/09/2021] [Accepted: 12/10/2021] [Indexed: 06/14/2023]
Abstract
In this study, polymeric ferric sulfate (PFS), aluminum sulfate (AS) and diatomite were added to enhance the aerobic granulation under low organic loading rate (OLR) of 0.6 kg·COD/(m3·d), and their effects of aerobic granule formation, extracellular polymeric substances (EPS) secretion and microbial community were investigated. The results showed that adding carriers could facilitated the growth of aerobic granules and improve the sludge settleability and biomass retention. Nutrient removal efficiencies were also enhanced. Compared with diatomite, adding PFS and AS resulted in more significant increase in EPS production, especially for the extracellular proteins. For microbial community, the dominated bacteria (Zoogloea, 18.47-23.95%) in the mature granular consortia were similar. Moreover, the introduction of PFS and diatomite contributed to the enrichment of Paracoccus, which was responsible for denitrification. Adding carriers potentially activated the functional genes related to metabolism and genetic information processing, and PFS had the most significant effects.
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Affiliation(s)
- Zhe Liu
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Yan Ta Road. No.13, Xi'an 710055, China; Key Lab of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an 710055, China.
| | - Xuhua Zhang
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Yan Ta Road. No.13, Xi'an 710055, China
| | - Shumin Zhang
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Yan Ta Road. No.13, Xi'an 710055, China
| | - Hao Qi
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Yan Ta Road. No.13, Xi'an 710055, China
| | - Yiwen Hou
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Yan Ta Road. No.13, Xi'an 710055, China
| | - Min Gao
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Yan Ta Road. No.13, Xi'an 710055, China
| | - Jiaxuan Wang
- School of Architecture and Civil Engineering, Xi'an University of Science and Technology, Yan Ta Road, No. 58, Xi'an 710054, China
| | - Aining Zhang
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Yan Ta Road. No.13, Xi'an 710055, China
| | - Yiping Chen
- Institute of Earth Environment, Chinese Academy of Sciences, No. 10 Fenghui South Road, Xi'an 710075, China
| | - Yongjun Liu
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Yan Ta Road. No.13, Xi'an 710055, China; Key Lab of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an 710055, China
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Abstract
As non-renewable resource, the recovery and utilization of phosphorus from wastewater is an enduring topic. Stimulated by the advances in research on polyphosphates (polyP) as well as the development of Enhanced Biological Phosphorus Removal (EBPR) technology to achieve the efficient accumulation of polyP via polyphosphate accumulating organisms (PAOs), a novel phosphorus removal strategy is considered with promising potential for application in real wastewater treatment processes. This review mainly focuses on the mechanism of phosphorus aggregation in the form of polyP during the phosphate removal process. Further discussion about the reuse of polyP with different chain lengths is provided herein so as to suggest possible application pathways for this biosynthetic product.
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Zhang DW, Zheng JT, Zheng J, Zhao MK, Wang ML, Zhang SH. Pilot study on the treatment of low carbon and nitrogen ratio municipal sewage by A1/O2/A3/A4/O5 sludge-membrane coupling process with multi-point inflow. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:609-621. [PMID: 34341919 DOI: 10.1007/s11356-021-15721-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 07/26/2021] [Indexed: 06/13/2023]
Abstract
A new multi-point inflow pre-anoxic/oxic/anaerobic/anoxic/oxic (A1/O2/A3/A4/O5) sludge-membrane coupling process and pilot plant were developed and designed to solve the problem of nitrogen and phosphorus removal of low carbon and nitrogen (C/N) ratio domestic sewage in southern China. The removal effect and transformation rule of organic matter, nitrogen, and phosphorus in the system were studied by changing the distribution ratio of multi-point influent. The average C/N ratio of the influent was 2.09 and the influent distribution ratio was 1:1. When the temperature was 16-25 °C, the average concentrations of chemical oxygen demand (COD), ammonia nitrogen (NH4+- N), total nitrogen (TN), and total phosphorus (TP) in the effluent were 21.31 (±2.65), 0.60 (±0.24), 12.76 (±1.09), and 0.34 (±0.05) mg/L, respectively, and their average removals are 87.3 (±1.2)%, 98.7 (±0.4)%, 74.1 (±1.3)%, and 88.1 (±0.4)% respectively. When the low temperature was 12-15 °C, the average removals were 78.6 (±1.1)%, 90.5 (±1.3)%, 73.7 (±1.13)%, and 86.6 (±1.7)%, respectively. Compared with the traditional anaerobic/anoxic/aerobic (A2O) process under the same conditions, the TN removal was increased by 15.4%, and the TP removal was increased by 22.2%. This system has obvious advantages in treating wastewater with low C/N ratio, thereby solving the problem wherein the effluent of biological phosphorus removal from low C/N ratio domestic sewage was difficult when it was lower than 0.5 mg/L.
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Affiliation(s)
- De-Wei Zhang
- Anhui University of Technology, Ma'anshan, Anhui, China.
- Anhui Huaqi Environmental Protection Technology Co. Ltd., Ma'anshan, Anhui, China.
- BAF Engineering Technology Research Center of Anhui Province, Ma'anshan, Anhui, China.
| | - Jun-Tian Zheng
- Anhui University of Technology, Ma'anshan, Anhui, China
- BAF Engineering Technology Research Center of Anhui Province, Ma'anshan, Anhui, China
| | - Jun Zheng
- Anhui University of Technology, Ma'anshan, Anhui, China
- Anhui Huaqi Environmental Protection Technology Co. Ltd., Ma'anshan, Anhui, China
- BAF Engineering Technology Research Center of Anhui Province, Ma'anshan, Anhui, China
| | - Meng-Ke Zhao
- Anhui University of Technology, Ma'anshan, Anhui, China
- BAF Engineering Technology Research Center of Anhui Province, Ma'anshan, Anhui, China
| | - Meng-Lin Wang
- Anhui University of Technology, Ma'anshan, Anhui, China
| | - Shi-Hua Zhang
- Anhui University of Technology, Ma'anshan, Anhui, China
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45
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Sun S, Han J, Hu M, Gao M, Qiu Q, Zhang S, Qiu L, Ma J. Removal of phosphorus from wastewater by Diutina rugosa BL3: Efficiency and pathway. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 801:149751. [PMID: 34428655 DOI: 10.1016/j.scitotenv.2021.149751] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 08/14/2021] [Accepted: 08/15/2021] [Indexed: 06/13/2023]
Abstract
A novel phosphorus removal yeast BL3 was isolated from an alternating anaerobic/aerobic biofilter and identified as Diutina rugosa by 26S rDNA gene sequence analysis. Yeast BL3 could effectively remove phosphorus from synthetic wastewater containing 2-20 mg/L phosphorus under optimal environmental conditions. The highest phosphorus removal efficiency was above 70% under the conditions of DO 6.86 mg/L, C/P ratios of 60, N/P ratios of 3.3, pH 6.0-9.0, and at 25.0-35.0 °C. The phosphorus distribution in the aqueous solution and different components of yeast BL3 analysis indicated that around 55%-70% and 20%-40% of removed phosphorus were transferred into extracellular polymeric substances (EPS) and yeast cells, respectively. The plausible phosphorus transfer pathway was proposed based on the phosphorus distribution and species analysis, suggesting the important role of EPS as a phosphorus reservoir. These results indicate that yeast BL3 can efficiently remove phosphorus under aerobic conditions without alternating anaerobic/aerobic cycling, and thus has significant potential for practical application in wastewater phosphorus removal.
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Affiliation(s)
- Shaofang Sun
- School of Civil Engineering and Architecture, University of Jinan, Jinan 250022, China; Research Center for Material & Water Purification Engineering of Shandong Province, Jinan 250022, China
| | - Junli Han
- School of Civil Engineering and Architecture, University of Jinan, Jinan 250022, China
| | - Mengfei Hu
- School of Civil Engineering and Architecture, University of Jinan, Jinan 250022, China
| | - Mingchang Gao
- School of Civil Engineering and Architecture, University of Jinan, Jinan 250022, China
| | - Qi Qiu
- School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China
| | - ShouBin Zhang
- School of Civil Engineering and Architecture, University of Jinan, Jinan 250022, China; Research Center for Material & Water Purification Engineering of Shandong Province, Jinan 250022, China
| | - Liping Qiu
- School of Civil Engineering and Architecture, University of Jinan, Jinan 250022, China; Research Center for Material & Water Purification Engineering of Shandong Province, Jinan 250022, China.
| | - Jun Ma
- State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China
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Zhang C, Li S, Ho SH. Converting nitrogen and phosphorus wastewater into bioenergy using microalgae-bacteria consortia: A critical review. BIORESOURCE TECHNOLOGY 2021; 342:126056. [PMID: 34601027 DOI: 10.1016/j.biortech.2021.126056] [Citation(s) in RCA: 84] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Revised: 09/23/2021] [Accepted: 09/27/2021] [Indexed: 06/13/2023]
Abstract
Conventional wastewater treatment using activated sludge cannot efficiently eliminate nitrogen and phosphorus, thus engendering the risk of water eutrophication and ecosystem disruption. Fortunately, a new wastewater treatment process applying microalgae-bacteria consortia has attracted considerable interests due to its excellent performance of nutrients removal. Moreover, some bacteria facilitate the harvest of microalgal biomass through bio-flocculation. Additionally, while stimulating the functional bacteria, the improved biomass and enriched components also brighten bioenergy production from the perspective of practical applications. Thus, this review first summarizes the current development of nutrients removal and mutualistic interaction using microalgae-bacteria consortia. Then, advancements in bio-flocculation are completely described and the corresponding mechanisms are thoroughly revealed. Eventually, the recent advances of bioenergy production (i.e., biodiesel, biohydrogen, bioethanol, and bioelectricity) using microalgae-bacteria consortia are comprehensively discussed. Together, this review will provide the ongoing challenges and future developmental directions for better converting nitrogen and phosphorus wastewater into bioenergy using microalgae-bacteria consortia.
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Affiliation(s)
- Chaofan Zhang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, PR China
| | - Shengnan Li
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, PR China
| | - Shih-Hsin Ho
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, PR China.
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47
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Effects of P/C ratios on the growth, phosphorus removal and phosphorus recovery of a novel strain of highly efficient PAO. Process Biochem 2021. [DOI: 10.1016/j.procbio.2021.08.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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48
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Li D, Chu Z, Zeng Z, Sima M, Huang M, Zheng B. Effects of design parameters, microbial community and nitrogen removal on the field-scale multi-pond constructed wetlands. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 797:148989. [PMID: 34351277 DOI: 10.1016/j.scitotenv.2021.148989] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 07/07/2021] [Accepted: 07/07/2021] [Indexed: 06/13/2023]
Abstract
Ecological multi-pond constructed wetlands (CWs) are an alternative wastewater treatment technology for nitrogen removal from non-point source pollution. As an important component of nitrogen cycles in the field-scale CWs, microorganisms are affected by design parameters. Nevertheless, the mechanism of design parameters affecting the distribution of microbial community and removal performance remains largely unexplored. In this study, satisfactory nitrogen removal performance was obtained in three multi-pond CWs. The highest mass removal rate per square meter (1104.0 mg/m2/day) and mass removal rate per cubic meter (590.2 mg/m3/day) for total nitrogen removal were obtained in the XY CW system during the wet season. The changes in seasonal parameters accounted for different removal performances and distributions of the microbial community. The combination of wastewater treatment technologies in the XY CW system consisting of ponds, CWs, and eco-floating treatment wetlands enriched the abundances of nitrogen-related functional genera. Correlation network analysis further demonstrated that longer hydraulic residence time and higher nitrogen concentration could intensify the enrichment of nitrogen-related functional genera. Regulating the combination of wastewater treatment technologies, the nitrogen concentration of influent, hydraulic loading rate, and water depth might promote the accumulation of microbial communities and enhance nitrogen removal. Macroscopical spatial/temporal regulation were proposed to enhance the treatment of non-point source pollution. The clarification of driving mechanism on design parameters, microbial community, and removal performance provided a novel perspective on the long-term maintenance of purification performance, practically sustainable applications, and scientific management of field-scale multi-pond CWs.
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Affiliation(s)
- Dan Li
- National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; State Environmental Protection Key Laboratory of Lake Pollution Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China
| | - Zhaosheng Chu
- National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; State Environmental Protection Key Laboratory of Lake Pollution Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
| | - Zhenzhong Zeng
- School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Matthew Sima
- Department of Civil and Environmental Engineering, Princeton University, NJ 08540, USA
| | - Minsheng Huang
- School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China
| | - Binghui Zheng
- National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; State Environmental Protection Key Laboratory of Lake Pollution Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
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49
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Izadi P, Izadi P, Eldyasti A. Enhancement of simultaneous nitrogen and phosphorus removal using intermittent aeration mechanism. J Environ Sci (China) 2021; 109:1-14. [PMID: 34607658 DOI: 10.1016/j.jes.2021.02.026] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 02/23/2021] [Accepted: 02/23/2021] [Indexed: 06/13/2023]
Abstract
Biological nutrient removal grows into complicated scenario due to the microbial consortium shift and kinetic competition between phosphorus (P)-accumulating and nitrogen (N)-removing microorganisms. In this study, three sequential batch reactors with constant operational conditions except aeration patterns at 6 h cycle periods were tested. Intermittent aeration was applied to develop a robust nutrient removal system aimed to achieve high energy saving and removal efficiency. The results showed higher correspondence of P-uptake, polymeric substance synthesis and glycogen degradation in intermittent-aeration with longer interval periods compared to continuous-aeration. Increasing the intermittent-aeration duration from 25 to 50 min, resulted in higher process performance where the system exhibited approximately 30% higher nutrient removal. This study indicated that nutrient removal strongly depends on reaction phase configuration representing the importance of aeration pattern. The microbial community examined the variation in abundance of bacterial groups in suspended sludge, where the 50 min intermittent aeration, favored the growth of P-accumulating organisms and nitrogen removal microbial groups, indicating the complications related to nutrient removal systems. Successful intermittently aerated process with high capability of simple implementation to conventional systems by elemental retrofitting, is applicable for upgrading wastewater treatment plants. With aeration as a major operational cost, this process is a promising approach to potentially remove nutrients in high competence, in distinction to optimizing cost-efficacy of the system.
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Affiliation(s)
- Parnian Izadi
- Civil engineering, York university, 4700 Keele St, Toronto, ON, Canada
| | - Parin Izadi
- Civil engineering, York university, 4700 Keele St, Toronto, ON, Canada
| | - Ahmed Eldyasti
- Civil engineering, York university, 4700 Keele St, Toronto, ON, Canada.
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50
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Luis A, Ana Lorena EG, Amaya L, Iñaki T. Unplanted wetland-type filter for co-treatment of landfill leachate and septic tank wastewater: Analysing gravel replacement by plastic and passive (filling-emptied) aeration effects at pilot scale. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 294:112940. [PMID: 34119985 DOI: 10.1016/j.jenvman.2021.112940] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 04/30/2021] [Accepted: 05/08/2021] [Indexed: 06/12/2023]
Abstract
Nowadays, traditional residential and industrial wastewater treatment methods have been mainly developed as complex systems that consider costly infrastructure, which requires advanced control systems and highly qualified labour for their operation. The use of wetland-type infrastructure has been recognized both, by scientists and authorities, as an efficient and effective method to obtain good results in these processes. The most relevant elements in the design of horizontal subsurface filters are filtering media, as biofilm supporting material and flow control methods. Usually, these treatment systems use gravel as filling material. Despite the functionality of the stone material, its weight presents serious difficulties for its handling at source and on site. The use of a plastic support would lower transportation costs, improve manageability and reduce the probability to damage the underlying impermeable layer. In addition, it might extent the useful life of the reactor by cleaning it when clogged, and the potential use of recycled plastic would improve the sustainability of the process. To verify the possibility of using a lightweight plastic material to replace heavy gravel, an unplanted pilot scale treatment system, composed of four independent treatment units in parallel was implemented. The treatment units differed in the filtering media and the input flow regime. Two of the treatment units used gravel (Specific surface 305 m2/m3, 1475 kg/m3 apparent density) and two units used plastic material (Specific surface 750 m2/m3, 172 kg/m3 apparent density). To check the incidence level of passive aeration procedures, on the effectiveness of each material, two of the treatment lines used a continuous flow system and two of them used an automatic filling and emptying flow method that allows passive aeration of the support media. A mixture of landfill leachate and septic tank wastewater was treated, and the evolution of turbidity, chemical oxygen demand, nitrogen and phosphorus was monitored. Results showed that, in general, there are no significant differences regarding the performance of the materials tested, whereas passive aeration notably improves the abatement and solids retention performance of the pilot units. It is concluded that the plastic material tested can be used as a replacement for the stone material, without having appreciable losses in the efficiency of the system. Further research is needed to quantify the benefits associated with the use of this support in constructed wetlands-type technologies.
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Affiliation(s)
- Aranibar Luis
- Department of Sciences and Techniques of Water and the Environment, School of Civil Engineering, University of Cantabria, Santander, Spain.
| | - Esteban-García Ana Lorena
- Department of Sciences and Techniques of Water and the Environment, School of Civil Engineering, University of Cantabria, Santander, Spain
| | - Lobo Amaya
- Department of Sciences and Techniques of Water and the Environment, School of Civil Engineering, University of Cantabria, Santander, Spain
| | - Tejero Iñaki
- Department of Sciences and Techniques of Water and the Environment, School of Civil Engineering, University of Cantabria, Santander, Spain
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