1
|
Shaaban M. Microbial pathways of nitrous oxide emissions and mitigation approaches in drylands. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 354:120393. [PMID: 38364533 DOI: 10.1016/j.jenvman.2024.120393] [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: 11/10/2023] [Revised: 01/07/2024] [Accepted: 02/11/2024] [Indexed: 02/18/2024]
Abstract
Drylands refer to water scarcity and low nutrient levels, and their plant and biocrust distribution is highly diverse, making the microbial processes that shape dryland functionality particularly unique compared to other ecosystems. Drylands are constraint for sustainable agriculture and risk for food security, and expected to increase over time. Nitrous oxide (N2O), a potent greenhouse gas with ozone reduction potential, is significantly influenced by microbial communities in drylands. However, our understanding of the biological mechanisms and processes behind N2O emissions in these areas is limited, despite the fact that they highly account for total gaseous nitrogen (N) emissions on Earth. This review aims to illustrate the important biological pathways and microbial players that regulate N2O emissions in drylands, and explores how these pathways might be influenced by global changes for example N deposition, extreme weather events, and climate warming. Additionally, we propose a theoretical framework for manipulating the dryland microbial community to effectively reduce N2O emissions using evolving techniques that offer inordinate specificity and efficacy. By combining expertise from different disciplines, these exertions will facilitate the advancement of innovative and environmentally friendly microbiome-based solutions for future climate change vindication approaches.
Collapse
Affiliation(s)
- Muhammad Shaaban
- College of Agriculture, Henan University of Science and Technology, Luoyang, China.
| |
Collapse
|
2
|
Gui X, Wang Z, Li K, Li Z, Mao X, Geng J, Pan Y. Enhanced nitrogen removal in sewage treatment is achieved by using kitchen waste hydrolysate without a significant increase in nitrous oxide emissions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 906:167108. [PMID: 37777127 DOI: 10.1016/j.scitotenv.2023.167108] [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: 06/26/2023] [Revised: 08/25/2023] [Accepted: 09/13/2023] [Indexed: 10/02/2023]
Abstract
Kitchen waste hydrolysate (KWH) is an effective replacement for commonly used carbon sources such as sodium acetate (NaAc) and glucose (Glu), in wastewater treatment plants (WWTPs) to enhance the total nitrogen (TN) removal efficiency in sewage and reduce the operating cost of WWTPs. However, KWH utilization introduces complex organic matter that may lead to increased nitrous oxide (N2O) emissions, compared with that of NaAc and Glu, causing significant damage to the atmosphere. Therefore, this study aims to compare the effects of KWH, Glu, and NaAc on N2O emissions in sewage treatment. The results indicated that KWH introduction did not lead to a significant increase in N2O emissions, with a conversion rate of only 5.61 %. Compared with raw sludge, the addition of only Glu and NaAc significantly increased the abundance of the nar G gene, indicating that the readily degradable carbon sources initiated denitrification at a faster rate than KWH. When KWH was added, there was a notable increase in the abundance of genes associated with partial nitrification and denitrification (nir K, hzo, and nos Z). In contrast, Glu and NaAc did not have a significant effect on the nos Z gene. The results suggested that KWH supplementation was more effective to reduce N2O to N2. Moreover, the KWH addition significantly increased the microbial diversity in the sludge and promoted the presence of shortcut nitrification and denitrification bacteria (Comamonadaceae) and denitrification bacteria (Rhodobacteraceae), further indicating the potential of KWH for enhanced denitrification and reduced N2O emissions. Overall, to the best of our knowledge, this is the first study that demonstrated KWH, as a novel and complex organic carbon source, can be safely used in sewage treatment processes to improve the pollutant removal efficiency without causing a significant increase in N2O emissions.
Collapse
Affiliation(s)
- Xuwei Gui
- Chongqing Key Lab of Soil Multi-Scale Interfacial Process, College of Resources and Environment, Southwest University, Chongqing 400716, China
| | - Zhengjiang Wang
- Chongqing Key Lab of Soil Multi-Scale Interfacial Process, College of Resources and Environment, Southwest University, Chongqing 400716, China
| | - Kaili Li
- School of chemical engineering, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Zhenlun Li
- Chongqing Key Lab of Soil Multi-Scale Interfacial Process, College of Resources and Environment, Southwest University, Chongqing 400716, China.
| | - Xinyu Mao
- Chongqing Key Lab of Soil Multi-Scale Interfacial Process, College of Resources and Environment, Southwest University, Chongqing 400716, China
| | - Jinzhao Geng
- Chongqing Key Lab of Soil Multi-Scale Interfacial Process, College of Resources and Environment, Southwest University, Chongqing 400716, China
| | - Yan Pan
- Chongqing Key Lab of Soil Multi-Scale Interfacial Process, College of Resources and Environment, Southwest University, Chongqing 400716, China
| |
Collapse
|
3
|
Ding Z, Zhang L, Xu Z, Xu H, Zheng F, Fu N, Wang L, An M. Isolation of a marine-derived yeast with potential applications in industrial nitrite utilizing. 3 Biotech 2024; 14:29. [PMID: 38178894 PMCID: PMC10761651 DOI: 10.1007/s13205-023-03866-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Accepted: 11/21/2023] [Indexed: 01/06/2024] Open
Abstract
The nitrite efficient utilization microorganism Wickerhamomyces anomalus RZWP01 was identified. Using nitrite and ammonium as the sole nitrogen source, the nitrogen removal rate of W. anomalus RZWP01 was 97.4% and 87.1%, respectively. W. anomalus RZWP01 grew well in the nitrite medium with glucose or xylose as the only carbon source. However, the W. anomalus RZWP01 cannot live on the nitrite medium with lactose, citric acid, and methanol as the only carbon source. The maximal cell concentration occurred in the nitrite medium with glucose as the only carbon source at a C/N ratio of 20 for 48 h, reaching 8.92 × 108 cell mL-1. W. anomalus RZWP01 was the first reported yeast that can efficiently utilize nitrite. The isolation and identification of W. anomalus RZWP01 enriched the microbial resources of nitrite-degrading microorganisms and provided functional microorganisms for the water treatment of sustainable aquaculture.
Collapse
Affiliation(s)
- Zhen Ding
- Department of Marine Technology, Rizhao Polytechnic, Rizhao, 276826 Shandong China
- Joint Research and Development Centre of Biotechnology, RETAD, Rizhao, 276826 China
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, 266237 China
| | - Li Zhang
- Joint Research and Development Centre of Biotechnology, RETAD, Rizhao, 276826 China
| | - Zhongping Xu
- Department of Marine Technology, Rizhao Polytechnic, Rizhao, 276826 Shandong China
| | - Hongli Xu
- Joint Research and Development Centre of Biotechnology, RETAD, Rizhao, 276826 China
| | - Faxin Zheng
- Department of Marine Technology, Rizhao Polytechnic, Rizhao, 276826 Shandong China
| | - Ning Fu
- Department of Marine Technology, Rizhao Polytechnic, Rizhao, 276826 Shandong China
| | - Lushan Wang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, 266237 China
| | - Meiling An
- Department of Marine Technology, Rizhao Polytechnic, Rizhao, 276826 Shandong China
| |
Collapse
|
4
|
Ai D, Chen L, Xie J, Cheng L, Zhang F, Luan Y, Li Y, Hou S, Sun F, Xia LC. Identifying local associations in biological time series: algorithms, statistical significance, and applications. Brief Bioinform 2023; 24:bbad390. [PMID: 37930023 DOI: 10.1093/bib/bbad390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 08/21/2023] [Accepted: 09/14/2023] [Indexed: 11/07/2023] Open
Abstract
Local associations refer to spatial-temporal correlations that emerge from the biological realm, such as time-dependent gene co-expression or seasonal interactions between microbes. One can reveal the intricate dynamics and inherent interactions of biological systems by examining the biological time series data for these associations. To accomplish this goal, local similarity analysis algorithms and statistical methods that facilitate the local alignment of time series and assess the significance of the resulting alignments have been developed. Although these algorithms were initially devised for gene expression analysis from microarrays, they have been adapted and accelerated for multi-omics next generation sequencing datasets, achieving high scientific impact. In this review, we present an overview of the historical developments and recent advances for local similarity analysis algorithms, their statistical properties, and real applications in analyzing biological time series data. The benchmark data and analysis scripts used in this review are freely available at http://github.com/labxscut/lsareview.
Collapse
Affiliation(s)
- Dongmei Ai
- School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China
| | - Lulu Chen
- School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China
| | - Jiemin Xie
- Department of Statistics and Financial Mathematics, School of Mathematics, South China University of Technology, Guangzhou 510641, China
| | - Longwei Cheng
- School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China
| | - Fang Zhang
- Shenwan Hongyuan Securities Co. Ltd., Shanghai 200031, China
| | - Yihui Luan
- School of Mathematics, Shandong University, Jinan 250100, China
| | - Yang Li
- Department of Statistics and Financial Mathematics, School of Mathematics, South China University of Technology, Guangzhou 510641, China
| | - Shengwei Hou
- Department of Ocean Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Fengzhu Sun
- Department of Quantitative and Computational Biology, University of Southern California, California, 90007, USA
| | - Li Charlie Xia
- Department of Statistics and Financial Mathematics, School of Mathematics, South China University of Technology, Guangzhou 510641, China
| |
Collapse
|
5
|
Yang Z, Lou Y, Pan H, Wang H, Yang Q, Sun Y, Zhuge Y. Reinforced Bioremediation of Excessive Nitrate in Atrazine-Contaminated Soil by Biodegradable Composite Carbon Source. Polymers (Basel) 2023; 15:2765. [PMID: 37447411 DOI: 10.3390/polym15132765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 06/10/2023] [Accepted: 06/19/2023] [Indexed: 07/15/2023] Open
Abstract
Bioremediation is a good alternative to dispose of the excessive nitrate (NO3-) in soil and alleviate the secondary salinization of soil, but the presence of atrazine in soil interferes with the bioremediation process. In the present study, the biodegradable composite carbon source with different dosages was added to the atrazine-contaminated soil to intensify the bioremediation of excessive NO3-. The atrazine-contaminated soil with a 25 g/kg composite carbon source achieved the optimal NO3- removal performance (92.10%), which was slightly higher than that with a 5 g/kg composite carbon source (86.15%) (p > 0.05). Unfortunately, the negative effects of the former were observed, such as the distinctly higher emissions of N2O, CO2 and a more powerful global warming potential (GWP). Microbial community analysis showed that the usage of the composite carbon source clearly decreased the richness and diversity of the microbial community, and greatly stimulated nitrogen metabolism and atrazine degradation (p < 0.05). To sum up, the application of a 5 g/kg composite carbon source contributed to guaranteeing bioremediation performance and reducing adverse environmental impacts at the same time.
Collapse
Affiliation(s)
- Zhongchen Yang
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, 61 Daizong Road, Tai'an 271018, China
| | - Yanhong Lou
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, 61 Daizong Road, Tai'an 271018, China
| | - Hong Pan
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, 61 Daizong Road, Tai'an 271018, China
| | - Hui Wang
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, 61 Daizong Road, Tai'an 271018, China
| | - Quangang Yang
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, 61 Daizong Road, Tai'an 271018, China
| | - Yajie Sun
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, 61 Daizong Road, Tai'an 271018, China
| | - Yuping Zhuge
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, 61 Daizong Road, Tai'an 271018, China
| |
Collapse
|
6
|
Cheng L, Yang W, Liang H, Nabi M, Li Y, Wang H, Hu J, Chen T, Gao D. Nitrogen removal from mature landfill leachate through enhanced Partial Nitrification-Anammox process in an innovative multi-stage fixed biofilm reactor. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 877:162959. [PMID: 36948321 DOI: 10.1016/j.scitotenv.2023.162959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 03/08/2023] [Accepted: 03/15/2023] [Indexed: 05/06/2023]
Abstract
In the current integrated PN/A method/process for mature landfill leachate treatment, microbial inhibition and low nitrogen removal capacity are the big barriers due to high ammonia concentration and low C/N. This study aimed to evaluate the performance of a high-rate nitrogen removal lab-scale reactor, which combines pre-denitrification and Partial Nitrification-Anammox (PN/A) in a multi-stage fixed biofilm reactor (MFBR), for mature landfill leachate treatment. A nitrogen removal efficiency (NRE) of 90.43 % and an average nitrogen removal rate (NRR) of 0.94 kg/m3·d were observed at an influent NH+ 4-N concentration of 2274.39 mg/L during the last operational phase. The nitrogen mass balance showed that the nitrogen concentration gradually decreases along the course, and nitrogen was mainly removed in the aerobic chambers, in which Anammox contributed to 86.4 % of the removed nitrogen, while the front anoxic chamber is mainly used to remove NO- 3-N from the recirculation. Redundancy analysis showed that the variation in NH+ 4-N concentration along the course was the main factor affecting microbial community succession, which shows that the reactor configuration enables efficient cooperation and distribution of different microorganisms. Moreover, economic analysis of MFBR process showed that the energy consumption and carbon addition were reduced by 58.9 % and 100 %, respectively. Therefore, the MFBR established in this study, with its new configuration, achieves efficient treatment of landfill leachate in a single reactor and is environmentally friendly, and could be considered as a reference for full-scale landfill leachate treatment.
Collapse
Affiliation(s)
- Lang Cheng
- Centre for Urban Environmental Remediation, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
| | - Wenbo Yang
- Centre for Urban Environmental Remediation, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
| | - Hong Liang
- Centre for Urban Environmental Remediation, Beijing University of Civil Engineering and Architecture, Beijing 100044, China; Key Laboratory of Urban Stormwater System & Water Environment (Ministry of Education), Beijing University of Civil Engineering and Architecture, Beijing 100044, China; Collaborative Innovation Center of Energy Conservation & Emission Reduction and Sustainable Urban-Rural Development in Beijing, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
| | - Mohammad Nabi
- Centre for Urban Environmental Remediation, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
| | - Yuqi Li
- Centre for Urban Environmental Remediation, Beijing University of Civil Engineering and Architecture, Beijing 100044, China; School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Huan Wang
- Shanghai SUS Environmental Remediation Co., LTD, Shanghai 201703, China
| | - Jiachen Hu
- Shanghai SUS Environmental Remediation Co., LTD, Shanghai 201703, China
| | - Tao Chen
- Key Laboratory of Urban Stormwater System & Water Environment (Ministry of Education), Beijing University of Civil Engineering and Architecture, Beijing 100044, China
| | - Dawen Gao
- Centre for Urban Environmental Remediation, Beijing University of Civil Engineering and Architecture, Beijing 100044, China; Key Laboratory of Urban Stormwater System & Water Environment (Ministry of Education), Beijing University of Civil Engineering and Architecture, Beijing 100044, China; Key Laboratory of Urban Stormwater System & Water Environment (Ministry of Education), Beijing University of Civil Engineering and Architecture, Beijing 100044, China.
| |
Collapse
|
7
|
Zhou X, Cheng T, Yu J, Sheng M, Ma X, Cao Y. Responses of sediment nitrogen forms and bacterial communities to different aquatic nitrogen conditions in three submerged macrophyte-type ecological treatment systems. ENVIRONMENTAL RESEARCH 2023:116322. [PMID: 37321338 DOI: 10.1016/j.envres.2023.116322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 05/29/2023] [Accepted: 06/01/2023] [Indexed: 06/17/2023]
Abstract
Ecological treatment system (ETS) is a promising technology for mitigating agricultural non-point pollution. However, the responses of sediment nitrogen (N) forms and bacterial communities to different aquatic N conditions during the treatment procedure are currently unknown. Therefore, a four-month microcosm experiment was conducted to investigate the effects of three aquatic N conditions (2 mg/L NH4+-N, 2 mg/L NO3--N and 1 mg/L NH4+-N + 1 mg/L NO3--N) on sediment N forms and bacterial communities in three ETSs vegetated by Potamogeton malaianus, Vallisneria natans and artificial aquatic plant, respectively. Four transferable N fractions were monitored, and the valence state of N in ion-exchange and weak acid extractable fractions were mainly determined by aquatic N conditions, while significant N accumulation was observed only in strong oxidant extractable and strong alkali extractable fractions. Sediment N profiles were primarily influenced by time and plant type, with N condition having secondary effect. Moreover, sediment bacterial community structures experienced a significant shift over time and were slightly influenced by plant type. Functional genes related to N fixation, nitrification, assimilable nitrate reduction, dissimilatory nitrite reduction (DNRA) and denitrification were substantially enriched in month 4. Additionally, the sediment bacterial co-occurrence network exhibited less complexity but more stability under NO3- condition compared to others. Furthermore, certain sediment N fractions were found to have strong relationships with specific sediment bacteria, such as nitrifiers, denitrifiers and DNRA bacteria. Our findings highlight the significant influence of aquatic N condition in submerged macrophyte-type ETSs on sediment N forms and bacterial communities.
Collapse
Affiliation(s)
- Xinyan Zhou
- College of Environment and Resources, College of Carbon Neutral, Zhejiang A & F University, Hangzhou, Zhejiang, 311300, China
| | - Tiehan Cheng
- College of Environment and Resources, College of Carbon Neutral, Zhejiang A & F University, Hangzhou, Zhejiang, 311300, China
| | - Jiaming Yu
- College of Environment and Resources, College of Carbon Neutral, Zhejiang A & F University, Hangzhou, Zhejiang, 311300, China
| | - Mengting Sheng
- College of Environment and Resources, College of Carbon Neutral, Zhejiang A & F University, Hangzhou, Zhejiang, 311300, China
| | - Xuelian Ma
- College of Environment and Resources, College of Carbon Neutral, Zhejiang A & F University, Hangzhou, Zhejiang, 311300, China
| | - Yucheng Cao
- College of Environment and Resources, College of Carbon Neutral, Zhejiang A & F University, Hangzhou, Zhejiang, 311300, China.
| |
Collapse
|
8
|
He S, Zhou J, Zhou L, Yang N, Gao J, Zhu J, Chen J, Chen J. Assessment and modeling of effluent quality, economic benefits, and greenhouse gas reduction for receiving brewery wastewater on A 2O by GPS-X. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 883:163671. [PMID: 37100123 DOI: 10.1016/j.scitotenv.2023.163671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 04/03/2023] [Accepted: 04/18/2023] [Indexed: 05/03/2023]
Abstract
Recently, breweries have been allowed to discharge brewery wastewater (BWW) to the sewage pipe network to alleviate the shortage of carbon sources of municipal wastewater treatment plants (MWTPs) under the premise of signing a contract with MWTPs in some countries. This study aims to provide a model-based method for MWTPs to evaluate the threshold, the effluent risk, the economic benefits, and the potential greenhouse gas (GHG) emissions reduction of receiving BWW. In this research, a simulation model of an anaerobic-anoxic-oxic process (A2O) receiving BWW was established based on the data of a real MWTP and brewery using GPS-X. The sensitivity factors of 189 parameters were analyzed, and several sensitive parameters were calibrated stably and dynamically. By analyzing the errors and standardized residuals, the calibrated model was proved to be high-quality and reliable. In the next phase, the impact of receiving BWW on the A2O was evaluated in terms of effluent quality, economic benefits, and GHG emissions reduction. The results showed that receiving a certain amount of BWW can effectively reduce the carbon source cost and GHG emissions for the MWTP compared with adding methanol. Though the chemical oxygen demand (COD), biochemical oxygen demand in five days (BOD5), and total nitrogen (TN) in the effluent increased in various degrees, the effluent quality still met the discharge standard implemented by the MWTP. The study can also facilitate the modeling work for many researchers and promote more kinds of food production wastewater to be treated equally.
Collapse
Affiliation(s)
- Shengjie He
- School of Materials & Environmental Engineering, Shenzhen Polytechnic, Shenzhen 518000, China; Beijing Enterprises Water Group Limited (BEWG), Beijing 100000, China; School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266011, China
| | - Jianfeng Zhou
- Georgia Tech Shenzhen Institute, Tianjin University (GTSI), Shenzhen 518000, China
| | - Li Zhou
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266011, China
| | - Nan Yang
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Jingsi Gao
- School of Materials & Environmental Engineering, Shenzhen Polytechnic, Shenzhen 518000, China.
| | - Jia Zhu
- School of Materials & Environmental Engineering, Shenzhen Polytechnic, Shenzhen 518000, China
| | - Jiawei Chen
- School of Materials & Environmental Engineering, Shenzhen Polytechnic, Shenzhen 518000, China
| | - Junjie Chen
- School of Municipal and Environmental Engineering, Jilin Jianzhu University, Changchun 130118, China
| |
Collapse
|
9
|
Tao Z, Jing Z, Tao M, Kong Y, Guan L, Jia Q. A novel filter-type constructed wetland for secondary effluent treatment: Performance and its microbial mechanism. BIORESOURCE TECHNOLOGY 2023; 380:129075. [PMID: 37088433 DOI: 10.1016/j.biortech.2023.129075] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 04/11/2023] [Accepted: 04/18/2023] [Indexed: 05/03/2023]
Abstract
A novel filter-type constructed wetland was constructed by combining plastic fillers and mineral fillers for secondary effluent treatment. Findings showed that TN, TP and COD removal in the constructed wetland with composite fillers (CFCW) was 3.9%, 8.0% and 3.5% higher than that of constructed wetland with ordinary gravel fillers (CW) in the stable phase, respectively. CFCW showed better pollutants removal when dealing with higher influent concentrations and hydraulic loading. The main functional bacteria in two systems were significantly different (p < 0.05). Composite fillers could change the dominant genera, enhance genera activity and increase genera quantity. Denitrification (e.g., Pseudorhodobacter, Zoogloea, Pseudarthrobacter), nitrification (e.g., Devosia, Nitrospira), heterotrophic nitrification-aerobic denitrification (e.g., Paracoccus) and partial denitrification (e.g., g__Simplicispira) in CFCW provided diverse nitrogen metabolism pathways, resulting in higher nitrogen removal. The novel filter-type constructed wetland is suitable for the advanced treatment of sewage treatment plant effluent with enhanced pollutants removal and exuberant microorganisms.
Collapse
Affiliation(s)
- Zhengkai Tao
- College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Zhaoqian Jing
- College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China.
| | - Mengni Tao
- College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Yu Kong
- Nanjing Municipal Design and Research Institute Co., Ltd., Nanjing 210008, China
| | - Lin Guan
- Nanjing Municipal Design and Research Institute Co., Ltd., Nanjing 210008, China
| | - Qiusheng Jia
- College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China
| |
Collapse
|
10
|
Yang Z, Lou Y, Pan H, Wang H, Yang Q, Zhuge Y, Hu J. Improved Denitrification Performance of Polybutylene Succinate/Corncob Composite Carbon Source by Proper Pretreatment: Performance, Functional Genes and Microbial Community Structure. Polymers (Basel) 2023; 15:polym15040801. [PMID: 36850087 PMCID: PMC9958998 DOI: 10.3390/polym15040801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 01/31/2023] [Accepted: 02/01/2023] [Indexed: 02/08/2023] Open
Abstract
Blending biodegradable polymers with plant materials is an effective method to improve the biodegradability of solid carbon sources and save denitrification costs, but the recalcitrant lignin in plant materials hinders the microbial decomposition of available carbon sources. In the present study, corncob pretreated by different methods was used to prepare polybutylene succinate/corncob (PBS/corncob) composites for biological denitrification. The PBS/corncob composite with alkaline pretreatment achieved the optimal NO3--N removal rate (0.13 kg NO3--N m-3 day-1) with less adverse effects. The pretreatment degree, temperature, and their interaction distinctly impacted the nitrogen removal performance and dissolved organic carbon (DOC) release, while the N2O emission was mainly affected by the temperature and the interaction of temperature and pretreatment degree. Microbial community analysis showed that the bacterial community was responsible for both denitrification and lignocellulose degradation, while the fungal community was primarily in charge of lignocellulose degradation. The outcomes of this study provide an effective strategy for improving the denitrification performance of composite carbon sources.
Collapse
|
11
|
Wang C, Qiao S, Zhou J. Strategy of nitrate removal in anaerobic ammonia oxidation-dependent processes. CHEMOSPHERE 2023; 313:137586. [PMID: 36529177 DOI: 10.1016/j.chemosphere.2022.137586] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Revised: 12/10/2022] [Accepted: 12/15/2022] [Indexed: 06/17/2023]
Abstract
The anaerobic ammonium oxidation (anammox), a microbial process that is considered as a low-cost and high efficient wastewater treatment, has received extensive attention with an attractive application prospect. The anammox process reduces nitrite (NO2-) to nitrogen gas (N2) with ammonium (NH4+) as the electron donor. However, some nitrate (NO3-) equivalent to 11% of total nitrogen (TN) is generated in this process, which limits the development of anammox. To overcome this problem, many efforts have been made in this regard, mainly combining with other biological treatment methods (denitrification, denitrifying anaerobic methane oxidation, etc.), introducing the substance into anammox process, etc. Herein, we summarized a detailed review of previous researches on the removal of NO3- in the anammox-dependent processes. It is hoped that this review could serve as valuable guidance in future research and practical applications of anammox.
Collapse
Affiliation(s)
- Chao Wang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
| | - Sen Qiao
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China.
| | - Jiti Zhou
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
| |
Collapse
|
12
|
Li X, Su K, Mou Y, Liu N, Lu T, Yu Z, Song M. Enhancement of nutrients removal and biomass accumulation of algal-bacterial symbiosis system by optimizing the concentration and type of carbon source in the treatment of swine digestion effluent. CHEMOSPHERE 2022; 308:136335. [PMID: 36087719 DOI: 10.1016/j.chemosphere.2022.136335] [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: 05/18/2022] [Revised: 07/31/2022] [Accepted: 09/01/2022] [Indexed: 06/15/2023]
Abstract
The algae-bacteria symbiosis system (ABS) is used to effectively solve the problems of low carbon/nitrogen (C/N) ratio, low biodegradability and high ammonia toxicity in swine digestion effluent. This study examined the effects of the concentration and type of carbon source on ABS in the pollutants removal especially ammonia. When C/N ratio was 30:1 and carbon source was sodium acetate, the ABS was most conducive to the removal of nitrogen, phosphorus and COD, and to the accumulation of biomass and lipids. To make the wastewater discharge meet the relevant standard, the ABS + mono-cultivation of algae reprocessing system (MAS), was applied to actual swine digestion effluent. Through adjusting the C/N ratio in ABS to 30:1, the biomass concentration was 2.06 times higher than that of raw wastewater, and the removal efficiencies of NH4+-N, TN, TP and COD increased by 1.43, 1.46, 1.95 and 1.28 times, respectively. The final concentrations of NH4+-N, TN, TP and COD after the treatment of ABS (C/N ratio of 30:1) + MAS, were 16.98 ± 1.07 mg L-1, 18.72 ± 1.81 mg L-1, 0.48 ± 0.01 mg L-1 and 263.49 ± 11.89 mg L-1, respectively, reached the Chinese discharge standards for livestock and poultry wastewater. Bacterial community analysis showed that the dominant species of the ABS (C/N ratio of 30:1) was Corynebacterium (genus level). This study revealed that adjusting the concentration and type of carbon source was helpful to the nutrient cycling and resource utilization of ABS, indicating a feasible technique for treating high ammonia nitrogen digestate.
Collapse
Affiliation(s)
- Xue Li
- School of Environmental Science & Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, 250353, PR China
| | - Kunyang Su
- School of Environmental Science & Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, 250353, PR China
| | - Yiwen Mou
- School of Environmental Science & Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, 250353, PR China
| | - Na Liu
- School of Environmental Science & Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, 250353, PR China
| | - Tianxiang Lu
- School of Environmental Science & Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, 250353, PR China
| | - Ze Yu
- School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China.
| | - Mingming Song
- School of Environmental Science & Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, 250353, PR China.
| |
Collapse
|
13
|
Li S, Wang S, Ji G. Influences of carbon sources on N 2O production during denitrification in freshwaters: Activity, isotopes and functional microbes. WATER RESEARCH 2022; 226:119315. [PMID: 36369690 DOI: 10.1016/j.watres.2022.119315] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Revised: 08/15/2022] [Accepted: 10/29/2022] [Indexed: 06/16/2023]
Abstract
Denitrification is one of the major sources of N2O in freshwaters. Diverse forms of organic compounds act as the electron donors for microbial denitrification. However, the influences of carbon sources on N2O production, N2O reduction, isotope fractionation and functional microbes during denitrification were largely unknown. In this study, five forms of carbon sources (i.e. acetate, citrate, glucose, cellobiose and leucine) were used to enrich denitrifiers in freshwater sediments. N2O conversion in the enrichments was investigated by a combination of inhibition technique, natural stable isotope method and metagenomics. Acetylene was effective in inhibiting N2O reduction without influencing the isotopic characteristics during N2O production. Glucose led to the least N2O production and reduction, in accordance with the lowest abundance of both NO and N2O reductases in this enrichment. δ18O and site preference value (SP, =δ15Nα-δ15Nβ) of N2O were sensitive to discriminate the five carbon sources, except when comparing acetate and leucine. Isotopic values of N2O were not significantly different in these two enrichments due to the similarity of NO reductases - Pseudomonas-type cNorB. Specifically, the enrichment with cellobiose produced N2O with the lowest δ18O values (39.4‰±1.1‰), due to Alicycliphilus with both cNorB and qNorB. The enrichment with glucose led to the highest SP values (8.9‰±8.6‰), caused by Thiobacillus-type cNorB. Our results demonstrated the link between carbon sources, N2O production and reduction, isotopic signatures, microbial populations and enzymes during denitrification in freshwaters.
Collapse
Affiliation(s)
- Shengjie Li
- Key Laboratory of Water and Sediment Sciences, Ministry of Education, Department of Environmental Engineering, Peking University, Beijing 100871, China
| | - Shuo Wang
- Key Laboratory of Water and Sediment Sciences, Ministry of Education, Department of Environmental Engineering, Peking University, Beijing 100871, China
| | - Guodong Ji
- Key Laboratory of Water and Sediment Sciences, Ministry of Education, Department of Environmental Engineering, Peking University, Beijing 100871, China.
| |
Collapse
|
14
|
Lee YJ, Lin BL, Lei Z. Nitrous oxide emission mitigation from biological wastewater treatment - A review. BIORESOURCE TECHNOLOGY 2022; 362:127747. [PMID: 35964917 DOI: 10.1016/j.biortech.2022.127747] [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: 07/14/2022] [Revised: 08/01/2022] [Accepted: 08/02/2022] [Indexed: 06/15/2023]
Abstract
Nitrous oxide (N2O) emitted from wastewater treatment processes has emerged as a focal point for academic and practical research amidst pressing environmental issues. This review presents an updated view on the biological pathways for N2O production and consumption in addition to the critical process factors affecting N2O emission. The current research trends including the strain and reactor aspects were then outlined with discussions. Last but not least, the research needs were proposed. The holistic life cycle assessment needs to be performed to evaluate the technical and economic feasibility of the proposed mitigation strategies or recovery options. This review also provides the background information for the proposed future research prospects on N2O mitigation and recovery technologies. As pointed out, dilution effects of the produced N2O gas product would hinder its use as renewable energy; instead, its use as an effective oxidizing agent is proposed as a promising recovery option.
Collapse
Affiliation(s)
- Yu-Jen Lee
- Department of Chemical Engineering, National Taiwan University, Taipei 10649, Taiwan
| | - Bin-le Lin
- Research Institute of Science for Safety and Sustainability, National Institute of Advanced Industrial Science and Technology, 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan
| | - Zhongfang Lei
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan.
| |
Collapse
|
15
|
Li T, Gao Y, Tang Y, Xu Y, Ren H, Huang H. A new LDH based sustained-release carbon source filter media to achieve advanced denitrogenation of low C/N wastewater at low temperature. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 838:156488. [PMID: 35671857 DOI: 10.1016/j.scitotenv.2022.156488] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Revised: 05/23/2022] [Accepted: 06/01/2022] [Indexed: 06/15/2023]
Abstract
Advanced denitrogenation of wastewater is now facing major challenges brought by low C/N ratio and low temperature. The development of sustained-release materials with good and stable carbon release properties was an effective countermeasure. FeNi-Layered double-metal hydroxides (LDH)- sodium carboxymethyl cellulose (CMC) filter media and its potential use in heterotrophic and sulfur-based mixotrophic denitrification biological filter (DNBF), was firstly reported. It demonstrated stable structure and good carbon release performance with a mass transfer coefficient (K) of 4.40 mg·L-1·s-1. When the influent NO3--N of 50 mg/L with the C/N ratio of 3 at 10 °C, the maximum nitrogen loading rate of 0.22 kg·N/(m3·d) and effluent TN close to 5 mg/L (nitrogen removal of almost 90 %) could be achieved. The slowly released carbon source and the leached iron increased the abundance of denitrifying bacteria and functional genes, and the augmentation of Sulfuritalea and the secretion of biofilm protein stimulated by sulfur also played a synergistic role. This study provided a new potentially effective strategy to enhance advanced denitrification of wastewater of low C/N wastewater at low temperature.
Collapse
Affiliation(s)
- Tong Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China
| | - Yilin Gao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China
| | - Yingying Tang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China
| | - Yujin Xu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China
| | - Hongqiang Ren
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China
| | - Hui Huang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China.
| |
Collapse
|
16
|
Singh AK, Gupta RK, Purohit HJ, Khardenavis AA. Genomic characterization of denitrifying methylotrophic Pseudomonas aeruginosa strain AAK/M5 isolated from municipal solid waste landfill soil. World J Microbiol Biotechnol 2022; 38:140. [PMID: 35705700 DOI: 10.1007/s11274-022-03311-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 05/15/2022] [Indexed: 11/26/2022]
Abstract
Municipal landfills are known for methane production and a source of nitrate pollution leading to various environmental issues. Therefore, this niche was selected for the isolation of one-carbon (C1) utilizing bacteria with denitrifying capacities using anaerobic enrichment on nitrate mineral salt medium supplemented with methanol as carbon source. Eight axenic cultures were isolated of which, isolate AAK/M5 demonstrated the highest methanol removal (73.28%) in terms of soluble chemical oxygen demand and methane removal (41.27%) at the expense of total nitrate removal of 100% and 33% respectively. The whole genome characterization with phylogenomic approach suggested that the strain AAK/M5 could be assigned to Pseudomonas aeruginosa with close neighbours as type strains DVT779, AES1M, W60856, and LES400. The circular genome annotation showed the presence of complete set of genes essential for methanol utilization and complete denitrification process. The study demonstrates the potential of P. aeruginosa strain AAK/M5 in catalysing methane oxidation thus serving as a methane sink vis-à-vis utilization of nitrate. Considering the existence of such bacteria at landfill site, the study highlights the need to develop strategies for their enrichment and designing of efficient catabolic activity for such environments.
Collapse
Affiliation(s)
- Ashish Kumar Singh
- Environmental Biotechnology and Genomics Division, CSIR-National Environmental Engineering Research Institute, Nehru Marg, Nagpur, Maharashtra, 440020, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Rakesh Kumar Gupta
- Environmental Biotechnology and Genomics Division, CSIR-National Environmental Engineering Research Institute, Nehru Marg, Nagpur, Maharashtra, 440020, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Hemant J Purohit
- Environmental Biotechnology and Genomics Division, CSIR-National Environmental Engineering Research Institute, Nehru Marg, Nagpur, Maharashtra, 440020, India
| | - Anshuman Arun Khardenavis
- Environmental Biotechnology and Genomics Division, CSIR-National Environmental Engineering Research Institute, Nehru Marg, Nagpur, Maharashtra, 440020, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
| |
Collapse
|
17
|
Zhang G, Pang Y, Zhou Y, Zhang Y, Zhu DZ. Effect of dissolved oxygen on N 2O release in the sewer system during controlling hydrogen sulfide by nitrate dosing. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 816:151581. [PMID: 34774952 DOI: 10.1016/j.scitotenv.2021.151581] [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: 09/30/2021] [Revised: 11/03/2021] [Accepted: 11/06/2021] [Indexed: 06/13/2023]
Abstract
Nitrate dosing is commonly used for controlling hydrogen sulfide in sewer systems. However, it may potentially facilitate N2O emission due to the denitrification process promoted by nitrate addition. In this study, lab-scale sewer reactors were operated to investigate the impact of nitrate addition on N2O production in sewer systems. Results showed that the N2O flux even increased by six times with the addition of nitrate when dissolved oxygen (DO) in the wastewater exceeded 0.4 mg/L. Principal component analysis showed that the N2O concentration was notably affected by DO and oxidation-reduction potential (ORP) in the wastewater. Furthermore, it was founded that N2O flux had a strong linear relationship with the DO concentration in the batch test. The microbial analysis found that the nosZ possessing organisms decreased significantly in the micro-aerobic condition and the copy numbers of nosZ gene declined consequently. It indicated that the inhibition of N2O reduced to N2 was responsible for significant accumulation and emission of N2O in the micro-aerobic condition. Given the gravity sewers are not completely anaerobic, the DO concentration is ranged from 0.1 to 2.4 mg/L in gravity sewers with the partially filled flow. Therefore, more attention should be paid to the N2O production when nitrate dosing for hydrogen sulfide controlling in gravity sewers.
Collapse
Affiliation(s)
- Guijiao Zhang
- College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, 310058, China
| | - Yao Pang
- College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, 310058, China
| | - Yongchao Zhou
- College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, 310058, China.
| | - Yiping Zhang
- College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, 310058, China
| | - David Z Zhu
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 2W2, Canada
| |
Collapse
|
18
|
Lee YY, Seo Y, Ha M, Lee J, Yang H, Cho KS. Dynamics of bacterial functional genes and community structures during rhizoremediation of diesel-contaminated compost-amended soil. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2021; 56:1107-1120. [PMID: 34554047 DOI: 10.1080/10934529.2021.1965817] [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: 03/11/2021] [Revised: 07/29/2021] [Accepted: 07/30/2021] [Indexed: 06/13/2023]
Abstract
The objective of this study was to characterize the effects of organic soil amendment (compost) on bacterial populations associated with petroleum hydrocarbon (PH) degradation and nitrous oxide (N2O) dynamics via pot experiments. Soil was artificially contaminated with diesel oil at total petroleum hydrocarbon (TPH) concentration of 30,000 mg·kg-soil-1 and compost was mixed with the contaminated soil at a 1:9 ratio (w/w). Maize seedlings were planted in each pot and a total of ten pots with two treatments (compost-amended and unamended) were prepared. The pot experiment was conducted for 85 days. The compost-amended soil had a significantly higher TPH removal efficiency (51.1%) than unamended soil (21.4%). Additionally, the relative abundance of the alkB gene, which is associated with PH degradation, was higher in the compost-amended soil than in the unamended soil. Similarly, cnorB and nosZ (which are associated with nitric oxide (NO) and N2O reduction, respectively) were also highly upregulated in the compost-amended soil. Moreover, the compost-amended soil exhibited higher richness and evenness indices, indicating that bacterial diversity was higher in the amended soil than in the unamended soil. Therefore, our findings may contribute to the development of strategies to enhance remediation efficiency and greenhouse gas mitigation during the rhizoremediation of diesel-contaminated soils.
Collapse
Affiliation(s)
- Yun-Yeong Lee
- Department of Environmental Science and Engineering, Ewha Womans University, Seoul, Republic of Korea
| | - Yoonjoo Seo
- Department of Environmental Science and Engineering, Ewha Womans University, Seoul, Republic of Korea
| | - Minyoung Ha
- Department of Environmental Science and Engineering, Ewha Womans University, Seoul, Republic of Korea
| | - Jiho Lee
- Department of Environmental Science and Engineering, Ewha Womans University, Seoul, Republic of Korea
| | - Hyoju Yang
- Department of Environmental Science and Engineering, Ewha Womans University, Seoul, Republic of Korea
| | - Kyung-Suk Cho
- Department of Environmental Science and Engineering, Ewha Womans University, Seoul, Republic of Korea
| |
Collapse
|
19
|
Zhou S, Song Z, Sun Z, Shi X, Zhang Z. The effects of undulating seasonal temperature on the performance and microbial community characteristics of simultaneous anammox and denitrification (SAD) process. BIORESOURCE TECHNOLOGY 2021; 321:124493. [PMID: 33310385 DOI: 10.1016/j.biortech.2020.124493] [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: 10/17/2020] [Revised: 11/26/2020] [Accepted: 11/27/2020] [Indexed: 06/12/2023]
Abstract
The effects of undulating seasonal temperature change (USTC) (10.1 °C-31.8 °C) on the N and carbon removal efficiency of simultaneous anammox and denitrification (SAD) were investigated, and the recovery performance of SAD was simulated. Results showed that 15 °C was the critical temperature of SAD for N and carbon removal under USTC from summer to winter. The removal efficiency of NH4+-N was improved in the final stage after temperature rise, but still lower than that in summer after long-term low temperature inhibition. The contribution of anammox to N removal was more than denitrification. The abundance of anammox bacteria (AnAOB) in SAD reactor was 8.8%-11.7% from summer to autumn. Candidatus Kuenenia replaced Candidatus Brocadia as the main AnAOB gradually. Finally, AnAOB abundance increased from 4.2% to 6.6% after recovery, and the abundance of denitrifying bacteria (DB) became the highest, which mainly includes Thauera and Hydrogenophaga.
Collapse
Affiliation(s)
- Shun Zhou
- 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
| | - Zhuangzhuang Song
- College of Environment and Ecology, Chongqing University, Chongqing 400044, China
| | - Zhulong Sun
- 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
| | - Xingdong Shi
- College of Environment and Ecology, Chongqing University, Chongqing 400044, China
| | - Zhi Zhang
- College of Environment and Ecology, Chongqing University, Chongqing 400044, China.
| |
Collapse
|
20
|
Feng C, Li Z, Zhu Y, Xu D, Geng J, Ren H, Xu K. Effect of magnetic powder on nitrous oxide emissions from a sequencing batch reactor for treating domestic wastewater at low temperatures. BIORESOURCE TECHNOLOGY 2020; 315:123848. [PMID: 32707505 DOI: 10.1016/j.biortech.2020.123848] [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: 05/28/2020] [Revised: 07/10/2020] [Accepted: 07/11/2020] [Indexed: 06/11/2023]
Abstract
Low temperatures can lead to an increase of N2O generation and emission from the nitrogen removal process in wastewater treatment plants. This study investigated the effect of the addition of magnetic powder on N2O generation and emission from a sequencing batch reactor treating domestic sewage at low temperatures. The results showed that the magnetic powder simultaneously inhibited N2O generation and emission and improved the removal of NH4+, total nitrogen (TN), and chemical oxygen demand at low temperatures. Furthermore, the conversion rate of N2O (N2O generation to TN removal) was reduced. The efficacy of the magnetic powder depended on its concentration, which could be ordered as 1 mg/L > 2 mg/L > 4 mg/L. With the addition of magnetic powder, especially at the 1 mg/L level, the activities of nitrification and denitrification enzymes in activated sludge were significantly improved and the growth of ammonium and nitrite oxidizing bacteria was also promoted.
Collapse
Affiliation(s)
- Chuanwen Feng
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Zhihao Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Yuanmo Zhu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Dan Xu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Jinju Geng
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Hongqiang Ren
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Ke Xu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China.
| |
Collapse
|
21
|
Chen H, Zeng L, Wang D, Zhou Y, Yang X. Recent advances in nitrous oxide production and mitigation in wastewater treatment. WATER RESEARCH 2020; 184:116168. [PMID: 32683143 DOI: 10.1016/j.watres.2020.116168] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 06/17/2020] [Accepted: 07/10/2020] [Indexed: 05/21/2023]
Abstract
Nitrous oxide (N2O) emitted from wastewater treatment plants has caused widespread concern. Over the past decade, people have made tremendous efforts to discover the microorganisms responsible for N2O production, elucidate metabolic pathways, establish production models and formulate mitigation strategies. The ultimate goal of all these efforts is to shed new light on how N2O is produced and how to reduce it, and one of the best ways is to find key opportunities by integrating the information obtained. This review article critically evaluates the knowledge gained in the field within a decade, especially in N2O production microbiology, biochemistry, models and mitigation strategies, with a focus on denitrification. Previous research has greatly deepened the understanding of the N2O generation mechanism, but further efforts are still needed due to the lack of standardized methodology for establishing N2O mitigation strategies in full-scale systems. One of the challenges seems to be to convert the denitrification process from a net N2O source into an effective sink, which is recommended as a key opportunity to reduce N2O production in this review.
Collapse
Affiliation(s)
- Hongbo Chen
- College of Environment and Resources, Xiangtan University, Xiangtan 411105, China.
| | - Long Zeng
- College of Environment and Resources, Xiangtan University, Xiangtan 411105, China
| | - Dongbo Wang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China.
| | - Yaoyu Zhou
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China
| | - Xiao Yang
- Korea Biochar Research Center, O-Jeong Eco-Resilience Institute & Division of Environmental Science and Ecological Engineering, Korea University, Seoul 02841, South Korea
| |
Collapse
|
22
|
Park HJ, Kwon JH, Yun J, Cho KS. Characterization of nitrous oxide reduction by Azospira sp. HJ23 isolated from advanced wastewater treatment sludge. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2020; 55:1459-1467. [PMID: 32960129 DOI: 10.1080/10934529.2020.1812321] [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: 05/13/2020] [Revised: 07/23/2020] [Accepted: 07/28/2020] [Indexed: 06/11/2023]
Abstract
A new nitrous oxide (N2O)-reducing bacterium was isolated from a consortium that was enriched using advanced wastewater treatment sludge as an inoculum and N2O as the sole nitrogen source. The isolated facultative anaerobe was identified as Azospira sp. HJ23. Azospira sp. HJ23 exhibited optimum N2O-reducing activity with a C/N ratio of 62 at pH 6 in the temperature range of 37 °C to 40 °C. The optimum carbon source for N2O reduction was a mixture of glucose and acetate. The maximum rate of N2O reduction by Azospira sp. HJ23 was 4.8 mmol·g-dry cell-1·h-1, and its N2O-reducing activity was higher than other known N2O reducers. Azospira sp. HJ23 possessed several functional genes for denitrification. These included narG (NO3- reductase), nirK (NO2- reductase), norB (NO reductase), and nosZ (N2O reductase) genes. These results suggest that Azospira sp. HJ23 can be applied in the denitrification process to minimalize N2O emission.
Collapse
Affiliation(s)
| | | | | | - Kyung-Suk Cho
- Department of Environmental Science and Engineering, Ewha Womans University, Seoul, Republic of Korea
| |
Collapse
|
23
|
Kwon JH, Park HJ, Lee YY, Cho KS. Evaluation of denitrification performance and bacterial community of a sequencing batch reactor under intermittent aeration. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2019; 55:179-192. [PMID: 31656118 DOI: 10.1080/10934529.2019.1681220] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 10/04/2019] [Accepted: 10/07/2019] [Indexed: 06/10/2023]
Abstract
Effects of operational parameters (initial nitrite concentration, initial nitrate concentration, carbon source, and COD/N ratio) on denitrification performance was evaluated using a sequencing batch reactor (SBR) under intermittent aeration. Complete denitrification was observed without N2O accumulation when the initial nitrite concentration was 100-500 mg-N·L-1. When the initial nitrate concentration was 75-300 mg-N·L-1, 95-96% of NO3--N was completely reduced to N2 gas. Acetate was the most effective sole carbon source for the complete denitrification of the SBR under intermittent aeration, and 99% of NO3--N was reduced to N2 gas. The optimum COD/N ratio was 8-12 for the complete denitrification, while NO2- accumulation was observed at low COD/N ratios of 1 and 2. In this study, N2O accumulation was not observed during the denitrification process regardless of operational condition. Paracoccus (15-68%), a representative aerobic denitrifying bacterium, was dominant in the SBR during the denitrification process, and the intermittent aeration condition could affect the abundance of Paracoccus in this study.
Collapse
Affiliation(s)
- Ji Hyeon Kwon
- Department of Environmental Science and Engineering, Ewha Woman's University, Seoul, Republic of Korea
| | - Hyung-Joo Park
- Department of Environmental Science and Engineering, Ewha Woman's University, Seoul, Republic of Korea
| | - Yun-Yeong Lee
- Department of Environmental Science and Engineering, Ewha Woman's University, Seoul, Republic of Korea
| | - Kyung-Suk Cho
- Department of Environmental Science and Engineering, Ewha Woman's University, Seoul, Republic of Korea
| |
Collapse
|