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Wang H, Du D, Ding Y, Zhang K, Zhi S. Removal of Antibiotic Resistance Genes from Animal Wastewater by Ecological Treatment Technology Based on Plant Absorption. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:4357. [PMID: 36901365 PMCID: PMC10001947 DOI: 10.3390/ijerph20054357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 02/22/2023] [Accepted: 02/27/2023] [Indexed: 06/18/2023]
Abstract
With the aim of controlling the pollution of antibiotic resistance genes (ARGs) in livestock and poultry wastewater, this paper highlights an ecological treatment technology based on plant absorption and comprehensively discusses the removal effect, driving factors, removal mechanism, and distribution characteristics of ARGs in plant tissues. The review shows that ecological treatment technology based on plant absorption has gradually become an important method of wastewater treatment of livestock and poultry breeding and has a good ARG removal effect. In plant treatment ecosystems, microbial community structure is the main driver of ARGs, while mobile genetic elements, other pollutants, and environmental factors also affect the growth and decline of ARGs. The role of plant uptake and adsorption of matrix particles, which provide attachment sites for microorganisms and contaminants, cannot be ignored. The distribution characteristics of ARGs in different plant tissues were clarified and their transfer mechanism was determined. In conclusion, the main driving factors affecting ARGs in the ecological treatment technology of plant absorption should be grasped, and the removal mechanism of ARGs by root adsorption, rhizosphere microorganisms, and root exudates should be deeply explored, which will be the focus of future research.
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Affiliation(s)
- Han Wang
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
- School of Resources and Environment Northeast Agricultural University, Harbin 150036, China
| | - Delin Du
- Key Laboratory of Low-Carbon Green Agriculture in North China, Ministry of Agriculture and Rural Affairs, Beijing 100193, China
| | - Yongzhen Ding
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
- China-UK Agro-Environmental Pollution Prevention and Control Joint Research Centre, Tianjin 300191, China
| | - Keqiang Zhang
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
- School of Resources and Environment Northeast Agricultural University, Harbin 150036, China
| | - Suli Zhi
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
- Key Laboratory of Low-Carbon Green Agriculture in North China, Ministry of Agriculture and Rural Affairs, Beijing 100193, China
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2
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Wang H, Zang S, Teng H, Wang X, Xu J, Sheng L. Characteristic of KMnO 4-modified corn straw biochar and its application in constructed wetland to treat city tail water. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:49948-49962. [PMID: 36787063 DOI: 10.1007/s11356-023-25856-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 02/06/2023] [Indexed: 02/15/2023]
Abstract
Biochar prepared from straw as constructed wetland (CW) substrate reduces straw pollution and simultaneously promotes the wastewater treatment efficiency of CW. In order to further analyze the pollutant removal mechanism of KMnO4-modified biochar substrate, the KMnO4-modified biochar was characterized. The experiment on city tail water treatment by CW with biochar was analyzed. The research showed that the surface property improvement on KMnO4 (0.1 mol/L)-modified biochar was the most obvious. The biochar modified by 0.1 mol/L KMnO4 increased the SSA and the number of oxygen functional groups and alcohol hydroxyl. KMnO4-modified biochar improved the removal efficiency of NO3--N in CW. KMnO4-modified biochar substrate with plants improved the TP removal efficiency (about 45%). KMnO4 as modifier reduced the influence of biochar on electrical conductivity tracing experiment. This study will improve the utilization value of straw and the removal efficiency of CW.
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Affiliation(s)
- Hanxi Wang
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, Key Laboratory of Vegetation Ecology of Ministry of Education, School of Environment, Institute of Grassland Science, Northeast Normal University, Jingyue Street 2555, Changchun, 130017, China.,Heilongjiang Province Key Laboratory of Geographical Environment Monitoring and Spatial Information Service in Cold Regions, Heilongjiang Province Collaborative Innovation Center of Cold Region Ecological Safety, School of Geographical Sciences, Harbin Normal University, Harbin, 150025, China
| | - Shuying Zang
- Heilongjiang Province Key Laboratory of Geographical Environment Monitoring and Spatial Information Service in Cold Regions, Heilongjiang Province Collaborative Innovation Center of Cold Region Ecological Safety, School of Geographical Sciences, Harbin Normal University, Harbin, 150025, China
| | - Haowen Teng
- Heilongjiang Province Key Laboratory of Geographical Environment Monitoring and Spatial Information Service in Cold Regions, Heilongjiang Province Collaborative Innovation Center of Cold Region Ecological Safety, School of Geographical Sciences, Harbin Normal University, Harbin, 150025, China
| | - Xinyu Wang
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, Key Laboratory of Vegetation Ecology of Ministry of Education, School of Environment, Institute of Grassland Science, Northeast Normal University, Jingyue Street 2555, Changchun, 130017, China
| | - Jianling Xu
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, Key Laboratory of Vegetation Ecology of Ministry of Education, School of Environment, Institute of Grassland Science, Northeast Normal University, Jingyue Street 2555, Changchun, 130017, China.
| | - Lianxi Sheng
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, Key Laboratory of Vegetation Ecology of Ministry of Education, School of Environment, Institute of Grassland Science, Northeast Normal University, Jingyue Street 2555, Changchun, 130017, China
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3
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Chen Y, Zhang J, Guo Z, Li M, Wu H. Optimizing agricultural biomass application to enhance nitrogen removal in vertical flow constructed wetlands for treating low-carbon wastewater. ENVIRONMENTAL RESEARCH 2022; 209:112867. [PMID: 35131325 DOI: 10.1016/j.envres.2022.112867] [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: 11/30/2021] [Revised: 01/10/2022] [Accepted: 01/28/2022] [Indexed: 06/14/2023]
Abstract
Agricultural biomass waste in rural areas has been identified as an economical solid carbon sources in constructed wetlands (CWs) for treating low C/N ratio domestic sewage. However, little information is available regarding its optimal utilization as a media amendment for enhancing nitrogen removal in CWs. In this study, vertical flow CWs with different walnut peel amendment proportions (0%, 25%, 50%, 75%) were developed to explore the effects of biomass dosage on the treatment performance, nitrous oxide (N2O) emission and microbial metabolites. Results showed that the addition of biomass significantly enhanced the denitrification performance in all CWs, and the higher total nitrogen (TN) removal efficiency (91.14-97.16%) was achieved in CWs with the optimal dosage of 25%. While the addition of biomass resulted in a slight increase in N2O emission (20.56-270.13 μg m-2 h-1) compared with control systems. Additionally, the biomass addition increased the accumulation of extracellular polymeric substances (EPS) by facilitating microbial processes. Higher total EPS production was observed in CW with 25% biomass, and the proportion of tightly bound EPS (48%) dominated in the total EPS in different CWs.
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Affiliation(s)
- Yingrun Chen
- College of Environmental Science & Engineering, Shandong University, Qingdao, 266237, PR China; College of Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, PR China
| | - Jian Zhang
- College of Environmental Science & Engineering, Shandong University, Qingdao, 266237, PR China
| | - Zizhang Guo
- College of Environmental Science & Engineering, Shandong University, Qingdao, 266237, PR China
| | - Ming Li
- College of Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, PR China
| | - Haiming Wu
- College of Environmental Science & Engineering, Shandong University, Qingdao, 266237, PR China.
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4
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Li Y, Liu L, Wang H. Mixotrophic denitrification for enhancing nitrogen removal of municipal tailwater: Contribution of heterotrophic/sulfur autotrophic denitrification and bacterial community. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 814:151940. [PMID: 34843783 DOI: 10.1016/j.scitotenv.2021.151940] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 11/20/2021] [Accepted: 11/20/2021] [Indexed: 06/13/2023]
Abstract
The heterotrophic and autotrophic denitrification system can be used to remove wastewater nitrogen effectively. However, the relationship between nitrogen removal performance and microbial community composition variation needs to be explored further. Therefore, a combined heterotrophic‑sulfur autotrophic biofilter (HSAD) was established to remove nitrogen from municipal tailwater. As methanol dosage increased from 12 mg/L to 36 mg/L, NO3--N removal efficiency increased from 86.1% to 98.9%, and the generation of SO42- in the effluent was controlled within 167.6-113.2 mg/L under the condition of 30 mg/L NO3--N in influent and 3 h hydraulic retention time. Increasing methanol dosage promoted the synergism of heterotrophic denitrification (HD) and sulfur autotrophic denitrification (SAD). Different denitrification performance was associated with the microbial community composition. Proteobacteria, Bacteroidetes, and Chloroflexi were major phyla with cumulative abundance of over 70% and Proteobacteria was predominate in all samples. Denitrifying bacteria, such as Ferritrophicum, Thiobacillus, Thauera and Comamonas dominated in different operation stages of mixotrophic reactor. The decrease in dominant HD bacteria accompanied with the increase in SAD bacteria, and the SAD bacterial richness declined with the rise of HD contribution in the total denitrification process. Correlation networks analysis indicated that the dominant bacteria had positive or negative correlation with each other, but a stable coexistence state of microbial community structure was formed under the mixotrophic conditions. This work deepens our understanding of HSAD and reveals the interconnection between nitrogen removal mechanism and microbial community composition variation.
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Affiliation(s)
- Yingying Li
- Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing 100083, China; College of Ecology and Environment, Hebei University, Baoding 071002, China
| | - Ling Liu
- College of Ecology and Environment, Hebei University, Baoding 071002, China
| | - Hongjie Wang
- Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing 100083, China; College of Ecology and Environment, Hebei University, Baoding 071002, China.
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Tan X, Yang YL, Liu YW, Li X, Zhu WB. Quantitative ecology associations between heterotrophic nitrification-aerobic denitrification, nitrogen-metabolism genes, and key bacteria in a tidal flow constructed wetland. BIORESOURCE TECHNOLOGY 2021; 337:125449. [PMID: 34320737 DOI: 10.1016/j.biortech.2021.125449] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 06/18/2021] [Accepted: 06/19/2021] [Indexed: 06/13/2023]
Abstract
This study explored the quantitative mechanisms of heterotrophic nitrification-aerobic denitrification (HN-AD) in a pilot-scale two-stage tidal flow constructed wetland (TFCW). The TFCW packed shale ceramsite (SC) and activated alumina (AA) at each stage, respectively, and aimed to improve decentralized wastewater treatment efficiency. In start-up phases, AA-TFCW accelerated NH4+-N decline, reaching transformation rates of 6.68 mg NH4+-N/(L·h). In stable phases, SC-AA-TFCW resisted low-temperatures (<13 °C), achieving stable NH4+-N and TN removal with effluents ranging 6.36-8.13 mg/L and 9.43-14.7 mg/L, respectively. The dominant genus, Ferribacterium, was the core of HN-AD bacteria, simultaneously removing NH4+-N and NO3--N by nitrate assimilation and complete denitrification (NO3--N → N2), respectively. The quantitative associations highlighted importance of nitrification, nitrate assimilation, and denitrification in nitrogen removal. HN-AD bacteria (e.g., Lactococcus, Thauera, and Aeromonas) carried high-weight genes in quantitative associations, including napAB, nasA and gltBD, implying that HN-AD bacteria have multiple roles in SC-AA-TFCW operation.
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Affiliation(s)
- Xu Tan
- College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China
| | - Yan-Ling Yang
- College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China
| | - Yong-Wang Liu
- China Architecture Design and Research Group, Beijing 100044, China.
| | - Xing Li
- College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China
| | - Wen-Bo Zhu
- College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China
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6
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Li J, Zheng L, Ye C, Ni B, Wang X, Liu H. Evaluation of an intermittent-aeration constructed wetland for removing residual organics and nutrients from secondary effluent: Performance and microbial analysis. BIORESOURCE TECHNOLOGY 2021; 329:124897. [PMID: 33657501 DOI: 10.1016/j.biortech.2021.124897] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 02/18/2021] [Accepted: 02/20/2021] [Indexed: 05/16/2023]
Abstract
This study proposed a novel intermittent-aeration constructed wetland (CW) to resolve the vertical loss of oxygen in tertiary treatment. Compared to the non-aeration CW, the intermittent-aeration CW presented a better removal performance (90.8% chemical oxygen demand, 94.3% ammonia nitrogen, 91.5% total nitrogen and 94.1% total phosphorus) at a dissolved oxygen of 3 mg L-1 and hydraulic retention time of 2 days. It was mainly attributed to the higher abundance and greater diversity of bacterial community due to the oxygen supply. High-throughput sequencing indicated that high abundance of phyla Proteobacteria (35.34%) and Bacteroidetes (18.20%) in intermittent-aeration CW were responsible for simultaneous nitrogen and phosphorus removal. Besides, the dominant families Burkholderiaceae (11.16%), Microtrichales (6.88%) and Saprospiraceae (6.50%) were also detected, which was vital to hydrolyze and utilize complex organic matters. In general, oxygen supply upregulated the metabolism pathways of amino acid and carbohydrate, bringing a greater biodegradation potential for removing contaminants.
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Affiliation(s)
- Jia Li
- Key Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education, School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, PR China; Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, PR China; Research Center for Pollution Control and Ecological Restoration, Yuxi Normal University, Yuxi 653100, Yunnan, PR China
| | - Lei Zheng
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, PR China; Centre for Technology in Water and Wastewater, University of Technology Sydney, Ultimo, NSW 2007, Australia
| | - Changbing Ye
- Research Center for Pollution Control and Ecological Restoration, Yuxi Normal University, Yuxi 653100, Yunnan, PR China
| | - Baosen Ni
- Research Center for Pollution Control and Ecological Restoration, Yuxi Normal University, Yuxi 653100, Yunnan, PR China
| | - Xingzhu Wang
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, PR China
| | - Hong Liu
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, PR China.
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Ding J, Jia Y, Zhao C, Bo W, Xu X, Lv R, Zhou G, Kong Q, Du Y, Xu F, Wang Q. Microbial abundance and community in constructed wetlands planted with Phragmites australis and Typha orientalis in winter. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2021; 23:1476-1485. [PMID: 33825568 DOI: 10.1080/15226514.2021.1907737] [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] [Indexed: 06/12/2023]
Abstract
The microbial abundance and communities were characterized in CWs with different plant species during winter. Better removal efficiency with high microbial abundance and diversified microbial community were found in CWs planted with Phragmites australis. This study confirmed that in winter, withered plants in CWs can effectively remove NH4+-N and COD by affecting microbial abundance and community structure.
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Affiliation(s)
- Jiewei Ding
- College of Geography and Environment, Collaborative Innovation Center of Human-Nature and Green Development in the Universities of Shandong, Shandong Normal University, Jinan, PR China
| | - Yingchao Jia
- College of Geography and Environment, Collaborative Innovation Center of Human-Nature and Green Development in the Universities of Shandong, Shandong Normal University, Jinan, PR China
| | - Congcong Zhao
- College of Geography and Environment, Collaborative Innovation Center of Human-Nature and Green Development in the Universities of Shandong, Shandong Normal University, Jinan, PR China
| | - Wenbin Bo
- College of Geography and Environment, Collaborative Innovation Center of Human-Nature and Green Development in the Universities of Shandong, Shandong Normal University, Jinan, PR China
| | - Xiaoqing Xu
- College of Geography and Environment, Collaborative Innovation Center of Human-Nature and Green Development in the Universities of Shandong, Shandong Normal University, Jinan, PR China
| | - Ruiyuan Lv
- College of Geography and Environment, Collaborative Innovation Center of Human-Nature and Green Development in the Universities of Shandong, Shandong Normal University, Jinan, PR China
- Institute of Environment and Ecology, Shandong Normal University, Jinan, PR China
| | - Guoying Zhou
- College of Geography and Environment, Collaborative Innovation Center of Human-Nature and Green Development in the Universities of Shandong, Shandong Normal University, Jinan, PR China
| | - Qiang Kong
- College of Geography and Environment, Collaborative Innovation Center of Human-Nature and Green Development in the Universities of Shandong, Shandong Normal University, Jinan, PR China
| | - Yuanda Du
- College of Geography and Environment, Collaborative Innovation Center of Human-Nature and Green Development in the Universities of Shandong, Shandong Normal University, Jinan, PR China
| | - Fei Xu
- College of Geography and Environment, Collaborative Innovation Center of Human-Nature and Green Development in the Universities of Shandong, Shandong Normal University, Jinan, PR China
| | - Qian Wang
- College of Geography and Environment, Collaborative Innovation Center of Human-Nature and Green Development in the Universities of Shandong, Shandong Normal University, Jinan, PR China
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Tan X, Yang YL, Liu YW, Yin WC, Fan XY. The synergy of porous substrates and functional genera for efficient nutrients removal at low temperature in a pilot-scale two-stage tidal flow constructed wetland. BIORESOURCE TECHNOLOGY 2021; 319:124135. [PMID: 32979599 DOI: 10.1016/j.biortech.2020.124135] [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: 08/03/2020] [Revised: 09/07/2020] [Accepted: 09/12/2020] [Indexed: 06/11/2023]
Abstract
A pilot-scale two-stage tidal flow constructed wetland (TFCW) with working volume of 0.46 m3/d packing with shale ceramsite (SC) and activated alumina (AA) was constructed (named as SC-AA-TFCW) for nutrients removal at low temperature (<15 °C). SC-AA-TFCW achieved stable removals of 78.1% nitrogen and 98.3% phosphorous. SC-TFCW contributed to 55.2% of organics and 85.6% of particulate phosphorous removal. Among 17 denitrifiers, the absolute abundance of aerobic denitrification bacteria (ADNB) was highest, followed by facultative anaerobic denitrification bacteria (FADNB) and autotrophic denitrification bacteria (AUDNB). Nitrogen assimilating into organic nitrogen, dissimilatory and assimilatory nitrate reduction and complete denitrification may be main nitrogen metabolic pathways. Some ADNB (e. g. Zoogloea, Pseudomonas and Acidovorax) showed positive interactions with various key functional genes related to nutrients removal. Dissolved oxygen and reducing elements were main environmental factors in changing ADNB compositions. This study highlights the importance of ADNB and their synergy to porous substrates in SC-AA-TFCW.
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Affiliation(s)
- Xu Tan
- College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China
| | - Yan-Ling Yang
- College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China
| | - Yong-Wang Liu
- College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China; China Architecture Design and Research Group, Beijing 100044, China
| | - Wen-Chao Yin
- China Architecture Design and Research Group, Beijing 100044, China
| | - Xiao-Yan Fan
- College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China.
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Xia Z, Liu G, She Z, Gao M, Zhao Y, Guo L, Jin C. Performance and bacterial communities in unsaturated and saturated zones of a vertical-flow constructed wetland with continuous-feed. BIORESOURCE TECHNOLOGY 2020; 315:123859. [PMID: 32707509 DOI: 10.1016/j.biortech.2020.123859] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 07/12/2020] [Accepted: 07/14/2020] [Indexed: 06/11/2023]
Abstract
In this study, a partially-saturated vertical-flow constructed wetland (VFCW) with continuous-feed was operated to investigate nutrients transformation and possible pathways in unsaturated and saturated zones. Effect of temperature on nutrients removal and microbial community was also evaluated. The variation of temperature barely affected removal of NH4+-N and COD, achieving removal efficiencies of 99.5-100.0% and 96.8-100.0% at effluent temperature of 14.9-27.7 °C. The removal of COD, NH4+-N, total inorganic nitrogen (TIN) and total phosphorus mainly occurred in unsaturated zone, achieving much higher removal rates than saturated zone. Nitrification process in the VFCW was associated with autotrophic/heterotrophic ammonia oxidizing bacteria and nitrite oxidizing bacteria. Denitrification process relied on both autotrophic and heterotrophic denitrifiers. Anaerobic ammonium oxidizing bacteria was also detected, contributing to TIN removal. All of the groups for nutrients removal exhibited higher abundance in unsaturated zone. Diverse pathways co-existed for nitrogen removal, while the main metabolic pathways were different along the depth.
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Affiliation(s)
- Zhengang Xia
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China. 266100 Qingdao, China
| | - Guochen Liu
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China. 266100 Qingdao, China
| | - Zonglian She
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China. 266100 Qingdao, China; College of Environmental Science and Engineering, Ocean University of China. 266100 Qingdao, China.
| | - Mengchun Gao
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China. 266100 Qingdao, China; College of Environmental Science and Engineering, Ocean University of China. 266100 Qingdao, China
| | - Yangguo Zhao
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China. 266100 Qingdao, China; College of Environmental Science and Engineering, Ocean University of China. 266100 Qingdao, China
| | - Liang Guo
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China. 266100 Qingdao, China; College of Environmental Science and Engineering, Ocean University of China. 266100 Qingdao, China
| | - Chunji Jin
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China. 266100 Qingdao, China; College of Environmental Science and Engineering, Ocean University of China. 266100 Qingdao, China
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10
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Tang S, Liao Y, Xu Y, Dang Z, Zhu X, Ji G. Microbial coupling mechanisms of nitrogen removal in constructed wetlands: A review. BIORESOURCE TECHNOLOGY 2020; 314:123759. [PMID: 32654809 DOI: 10.1016/j.biortech.2020.123759] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 06/18/2020] [Accepted: 06/19/2020] [Indexed: 06/11/2023]
Abstract
Nitrogen removal through microorganisms is the most important pathway in constructed wetlands (CWs). In this review, we summarize the microbial coupling mechanisms of nitrogen removal, which are the common methods of nitrogen transformation. The electron pathways are shortened and consumption of oxygen and energy is reduced during the coupling of nitrogen transformation functional microorganisms. The highly efficient nitrogen removal mechanisms are cultivated from the design conditions in CWs, such as intermittent aeration and tidal flow. The coupling of microorganisms and substrates enhances nitrogen removal mainly by supplying electrons, and plants affect nitrogen transformation functional microorganisms by the release of oxygen and exudates from root systems as well as providing carriers for microbial attachment. In addition, inorganic elements such as Fe, S and H act as electron donors to drive the autotrophic denitrification process in CWs.
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Affiliation(s)
- Shuangyu Tang
- Key Laboratory of Water and Sediment Sciences, Ministry of Education, Department of Environmental Engineering, Peking University, Beijing 100871, China
| | - Yinhao Liao
- Key Laboratory of Water and Sediment Sciences, Ministry of Education, Department of Environmental Engineering, Peking University, Beijing 100871, China
| | - Yichan Xu
- Key Laboratory of Water and Sediment Sciences, Ministry of Education, Department of Environmental Engineering, Peking University, Beijing 100871, China
| | - Zhengzhu Dang
- Key Laboratory of Water and Sediment Sciences, Ministry of Education, Department of Environmental Engineering, Peking University, Beijing 100871, China
| | - Xianfang Zhu
- 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.
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11
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Zhu M, Jing Z, Zheng Q, Du S, Ya T, Wang X. Microbial network succession along a current gradient in a bio-electrochemical system. BIORESOURCE TECHNOLOGY 2020; 314:123741. [PMID: 32650263 DOI: 10.1016/j.biortech.2020.123741] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 06/21/2020] [Accepted: 06/22/2020] [Indexed: 06/11/2023]
Abstract
A lab-scale three dimensional biofilm-electrode reactor (3DBER) coupled with sulfur/iron (3DBER-Fe/S) system was established to examine the impacts of current gradient on the performances and microbial network dynamics. Results showed that generally low current could promote nitrogen and phosphorus removal, while high current caused the inhibition of nutrients removal. Molecular ecological network (MEN) analysis showed that the current altered the overall architecture of the networks, and low currents could improve the scale and complexity of networks (<100 mA), while high current (≥100 mA) likely decrease the networks scale and complexity. Stronger competition was observed among Proteobacteria and Chloroflexi at high current conditions, which may be relevant to the deterioration of nutrients removal. In addition, the current dramatically altered the network interactions among denitrifiers, and the keystone species were intensively dynamic among various networks under the current gradient.
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Affiliation(s)
- Minghan Zhu
- Beijing Engineering Research Center of Environmental Material for Water Purification, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China; School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Zibo Jing
- Beijing Engineering Research Center of Environmental Material for Water Purification, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Quan Zheng
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Shuai Du
- Beijing Engineering Research Center of Environmental Material for Water Purification, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Tao Ya
- Beijing Engineering Research Center of Environmental Material for Water Purification, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Xiaohui Wang
- Beijing Engineering Research Center of Environmental Material for Water Purification, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
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Lai X, Zhao Y, Pan F, Yang B, Wang H, Wang S, Yuan Y. Enhanced nitrogen removal in filled-and-drained vertical flow constructed wetlands: microbial responses to aeration mode and carbon source. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:37650-37659. [PMID: 32608006 DOI: 10.1007/s11356-020-09915-6] [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: 02/14/2020] [Accepted: 06/26/2020] [Indexed: 06/11/2023]
Abstract
For the purpose of enhancing the removal rate of nitrogen (N) and organic matters, intermittent aeration and carbon source were used in filled-and-drained vertical flow constructed wetlands (VFCWs). The results showed that the best removal of COD (74.16%), NH4+-N (93.56%), TN (86.88%), and NO3--N (79.65%) was achieved in VFCW1 (aerated with carbon source system). Illumina MiSeq300 high-throughput sequencing showed that carbon source aerated system increases the diversity and richness of the microbial community. The copy numbers of nitrification functional genes (nxrA, amoA), denitrification functional genes (nirS, nirK, nosZ), and anammox functional gene (anammox 16S rRNA) displayed various changes when applied different aeration modes and additional carbon source to each system. An increase of the DO concentration and carbon source facilitated the absolute abundance of microbial nitrification and denitrification functional genes, respectively. All in all, these results demonstrate that carbon source combined with intermittent aeration is valid to improve the pollutant treatment performance in these systems.
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Affiliation(s)
- Xiaoshuang Lai
- School of Water Conservancy and Environment, University of Jinan, Jinan, 250022, China
| | - Yuqiang Zhao
- Jinan Environmental Research Academy, Jinan, 250102, Shandong, China
| | - Fuxia Pan
- Jinan Environmental Research Academy, Jinan, 250102, Shandong, China
| | - Baoshan Yang
- School of Water Conservancy and Environment, University of Jinan, Jinan, 250022, China
- Key Laboratory of Water Resources and Environmental Engineering in Universities of Shandong Province, University of Jinan, Jinan, 250022, China
| | - Hui Wang
- School of Water Conservancy and Environment, University of Jinan, Jinan, 250022, China.
- Key Laboratory of Water Resources and Environmental Engineering in Universities of Shandong Province, University of Jinan, Jinan, 250022, China.
| | - Shuzhi Wang
- School of Water Conservancy and Environment, University of Jinan, Jinan, 250022, China
| | - Yingrui Yuan
- School of Water Conservancy and Environment, University of Jinan, Jinan, 250022, China
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13
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Jia L, Li C, Zhang Y, Chen Y, Li M, Wu S, Wu H. Microbial community responses to agricultural biomass addition in aerated constructed wetlands treating low carbon wastewater. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 270:110912. [PMID: 32721346 DOI: 10.1016/j.jenvman.2020.110912] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 04/17/2020] [Accepted: 06/02/2020] [Indexed: 06/11/2023]
Abstract
Using agricultural biomasses as solid carbon substrates in constructed wetlands (CWs) could be an effective way to achieve sustainable nitrogen removal for carbon-limited wastewater treatments. This study investigated the response of bacteria community in CWs to the addition of agricultural biomasses (wheat straw, walnut shell and apricot pit). Results indicated that the addition of different agricultural biomasses had distinct influence on bacterial communities in CWs. Both wheat straw and walnut shell increased the diversity of microbial communities and optimized the structure of microorganisms. The effect of apricot pit on the richness and evenness of microbial communities was not significant, but the composition of microorganisms was significantly affected at the phylum level, especially the relative abundance of phylum Saccharibacteria. Moreover, the addition of agricultural biomasses in CWs acclimatized more functional bacteria including nitrifier and denitrifier, which were proved to be positively correlated with the high-rate denitrification performance. The obtained results would be beneficial to understand the underlying microbial mechanism of nitrogen removal in CWs with agricultural biomass and provide some guidance on the practical application of CWs.
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Affiliation(s)
- Lixia Jia
- School of Environment and Planning, Liaocheng University, Liaocheng, Shandong, 252000, PR China; College of Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, PR China
| | - Cong Li
- School of Environment and Planning, Liaocheng University, Liaocheng, Shandong, 252000, PR China; Shandong Liaohe Environmental Protection Technology Co., Ltd., Liaocheng, Shandong, 252000, PR China
| | - Yan Zhang
- College of Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, PR China
| | - Yingrun Chen
- College of Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, PR China
| | - Mengqi Li
- College of Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, PR China
| | - Shubiao Wu
- Department of Bioscience, Aarhus University, Aarhus, 8000C, Denmark
| | - Haiming Wu
- College of Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, PR China; Department of Bioscience, Aarhus University, Aarhus, 8000C, Denmark.
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14
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Huang X, Zhu J, Duan W, Gao J, Li W. Biological nitrogen removal and metabolic characteristics in a full-scale two-staged anoxic-oxic (A/O) system to treat optoelectronic wastewater. BIORESOURCE TECHNOLOGY 2020; 300:122595. [PMID: 31887583 DOI: 10.1016/j.biortech.2019.122595] [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: 10/31/2019] [Revised: 12/08/2019] [Accepted: 12/10/2019] [Indexed: 06/10/2023]
Abstract
In order to explore the treatment efficiency of optoelectronic wastewater and pollutant degradation mechanism of full-scale two-stage AO process, 160 d monitoring was conducted in this study. The results showed that the two-stage AO process owned relatively stable nitrogen and organic matter removal performance. The average concentration of COD, NH4+-N, and TN in effluent was 54, 3.78 and 13.77 mg L-1, respectively, and the removal rate was over 80%. The results of high-throughput sequencing demonstrated that the dominant microorganism was Proteobacteria, Bacteroidetes, Firmicutes, Chlorofeli, and Acidobacteria, and differences of interaction networks exited between aerobic and anoxic units. Meanwhile, the microorganism metabolism in aerobic units was significantly different from that in anoxic unit, and the metabolism of the microbial community for treating optoelectronic wastewater was significantly different from that for treating urban domestic sewage.
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Affiliation(s)
- 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 and Technology, Nanjing 210044, China
| | - Jia Zhu
- Department of Architecture and Environment, Shenzhen Polytechnic College, Shenzhen 518055, Guangdong, China.
| | - Weiyan Duan
- Ocean College of Hebei Agricultural University, Qinhuangdao 066003, China
| | - Jingsi Gao
- Department of Architecture and Environment, Shenzhen Polytechnic College, Shenzhen 518055, Guangdong, China
| | - Weijin Li
- Department of Architecture and Environment, Shenzhen Polytechnic College, Shenzhen 518055, Guangdong, China
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15
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Wang Y, Lin Z, Huang W, He S, Zhou J. Electron storage and resupply modes during sulfur cycle enhanced nitrogen removal stability in electrochemically assisted constructed wetlands under low temperature. BIORESOURCE TECHNOLOGY 2020; 300:122704. [PMID: 31911318 DOI: 10.1016/j.biortech.2019.122704] [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: 10/23/2019] [Revised: 12/21/2019] [Accepted: 12/26/2019] [Indexed: 06/10/2023]
Abstract
In this work, an electrochemically assisted vertical flow constructed wetland (E-VFCW) achieved efficient PO43--P (92.9-96.6%), NO3--N (50.8-91.8%) and TN (38.8-73.1%) removal from synthetic sewage effluent within 1-12 h at 12 °C. Abiotic reduction, Fe(II)-, S- and H2-dependent denitrification, as well as coupling of fermentation, acetogenesis and heterotrophic denitrification might facilitate NO3--N removal in the E-VFCW. Particularly, electron resupply for NO3--N reduction by the in-situ deposited FeS, FeS2 and S0 in the E-VFCW would occur during electron supply-demand disequilibrium situations (e.g., lower HRT or temperature). Stoichiometric results suggested that 21.7-278.7 mmol e- d-1 from the in-situ deposited S contributed to NO3--N reduction under HRT of 1-6 h at 12 °C, which improved the resilience capabilities of the E-VFCW to temperature and nitrogen loads fluctuations. Overall, this work provides new insights into the modes of S cycle mediating NO3--N conversions in the E-VFCW under low temperature.
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Affiliation(s)
- Yingmu Wang
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China; National Centre for International Research of Low-Carbon and Green Buildings, Chongqing University, Chongqing 400045, China
| | - Ziyuan Lin
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China; National Centre for International Research of Low-Carbon and Green Buildings, Chongqing University, Chongqing 400045, China
| | - Wei Huang
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China; National Centre for International Research of Low-Carbon and Green Buildings, Chongqing University, Chongqing 400045, China
| | - Shuang He
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China; National Centre for International Research of Low-Carbon and Green Buildings, Chongqing University, Chongqing 400045, China
| | - Jian Zhou
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China; National Centre for International Research of Low-Carbon and Green Buildings, Chongqing University, Chongqing 400045, China.
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16
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Li Y, Wang Y, Wan D, Li B, Zhang P, Wang H. Pilot-scale application of sulfur-limestone autotrophic denitrification biofilter for municipal tailwater treatment: Performance and microbial community structure. BIORESOURCE TECHNOLOGY 2020; 300:122682. [PMID: 31901555 DOI: 10.1016/j.biortech.2019.122682] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 12/20/2019] [Accepted: 12/23/2019] [Indexed: 06/10/2023]
Abstract
This work aimed to study a pilot-scale sulfur-limestone autotrophic denitrification biofilter (SLADB) to remove nitrogen from municipal tailwater. The capacity of nitrogen removal and spatial distribution of microbial community at low temperature condition were analyzed. Low temperature inhibits nitrogen removal; while prolonging hydraulic retention time (HRT) increased nitrogen removal efficiency. TN and NO3--N removal efficiency reached 81.1% and 85.3%, respectively, with HRT of 18 h at the temperature ranging from 6.4 to 9.8 °C. Proteobacteria and Chloroflexi were two dominant phyla. Along the reactor, class β-proteobacteria and ε-proteobacteria decreased, while γ-proteobacteria and Acidobacteria increased. For genus classification, Thiobacillus, Sulfurimonas, and Ferritrophicum which promote sulfur autotrophic denitrification, decreased significantly. While Anaerolineae promoting heterotrophic denitrification increased obviously. Sphingobacteriia coexisted in SLADB and were beneficial to nitrogen removal. Microbial community spatial distribution patterns were related to nitrogen removal. This study achieved reliable pilot-scale application of SLADB under low temperature for municipal tailwater.
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Affiliation(s)
- Yingying Li
- Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing 100083, China; Xiong'an Institute of Eco-Environment, Hebei University, Baoding 071002, China
| | - Yali Wang
- Xiong'an Institute of Eco-Environment, Hebei University, Baoding 071002, China
| | - Dongjin Wan
- School of Environmental Engineering, Henan University of Technology, Zhengzhou, Henan 450001, China
| | - Bang Li
- Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing 100083, China
| | - Panyue Zhang
- Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing 100083, China
| | - Hongjie Wang
- Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing 100083, China; Xiong'an Institute of Eco-Environment, Hebei University, Baoding 071002, China.
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17
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Cui H, Yang Y, Ding Y, Li D, Zhen G, Lu X, Huang M, Huang X. A novel pilot-scale tubular bioreactor-enhanced floating treatment wetland for efficient in situ nitrogen removal from urban landscape water: Long-term performance and microbial mechanisms. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2019; 91:1498-1508. [PMID: 31102431 DOI: 10.1002/wer.1147] [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: 04/01/2019] [Revised: 05/10/2019] [Accepted: 05/13/2019] [Indexed: 06/09/2023]
Abstract
In order to strengthen in situ nitrogen removal of urban landscape water, a novel pilot-scale tubular bioreactor-enhanced floating treatment wetland (TB-EFTW) was constructed, and the long-term performance and responsible microbial mechanisms were investigated in this study. The results showed that the system could remove 81.5% nitrogen from the landscape water after 240 days' operation. Moreover, the contribution rate of plant absorption to nitrogen was low (8.3%), which indicated that microbial biotransformation rather than plant absorption played a more key role in nitrogen removal in TB-EFTW system. The declining dissolved oxygen (DO) concentration along the axial direction of tubular bioreactor (TB) resulted in the sequential bacterial community of nitrifying, aerobic denitrifying, and anoxic denitrifying bacteria in the front, middle, and final part of TB. High-throughput sequencing results demonstrated that the internal environment of the system realized the coexistence of nitrifying, aerobic denitrifying and anoxic denitrifying process. The reason was mainly because that oxic-anoxic (O-A) areas were formed in sequence along the axial direction of tubular bioreactor. Overall, a unique advantage in nitrogen removal was achieved in TB-EFTW, which could provide important references for in situ treatment of urban landscape water. PRACTITIONER POINTS: TB-EFTW strengthened nitrogen removal for in situ urban landscape water treatment. Microbial conversion played a key role in nitrogen removal of the TB-EFTW system. The unique distribution of oxic-anoxic (O-A) areas was formed in sequence along the TB. Nitrification, aerobic, and anoxic denitrification were synergistically involved in the TB.
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Affiliation(s)
- He Cui
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China
| | - Yinchuan Yang
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China
| | - Yu Ding
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China
| | - Dan Li
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China
| | - Guangyin Zhen
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai, China
| | - Xueqin Lu
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China
- Institute of Eco-Chongming (IEC), Shanghai, China
| | - Minsheng Huang
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China
| | - Xiao Huang
- School of Civil and Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, China
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18
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Ghimire U, Nandimandalam H, Martinez-Guerra E, Gude VG. Wetlands for wastewater treatment. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2019; 91:1378-1389. [PMID: 31529659 DOI: 10.1002/wer.1232] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 08/06/2019] [Accepted: 08/19/2019] [Indexed: 06/10/2023]
Abstract
This article presents an update on the research and practical demonstration of wetland treatment technologies for wastewater treatment. Applications of wetlands in wastewater treatment (as an advanced treatment unit or a decentralized system) and stormwater management or treatment for nutrient and pollutant removal (metals, industrial and emerging pollutants including pharmaceutical compounds and pathogens) are highlighted. A summary of studies involving the effects of vegetation, wetland design and operation, and configurations for efficient treatment of various municipal and industrial wastewaters is also included. PRACTITIONER POINTS: Provides an update on current research and development of wetland technologies for wastewater treatment. Effects of vegetation, pathogens removal, heavy metals and emerging pollutants removal are included. Wetland design and operation is a key factor to improve water quality of wetland effluent.
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Affiliation(s)
- Umesh Ghimire
- Department of Civil and Environmental Engineering, Mississippi State University, Starkville, Mississippi
| | - Hariteja Nandimandalam
- Department of Civil and Environmental Engineering, Mississippi State University, Starkville, Mississippi
| | - Edith Martinez-Guerra
- Engineer Research and Development Center, U.S. Army Corps of Engineers, Vicksburg, Mississippi
| | - Veera Gnaneswar Gude
- Department of Civil and Environmental Engineering, Mississippi State University, Starkville, Mississippi
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19
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Sun H, Wang T, Yang Z, Yu C, Wu W. Simultaneous removal of nitrogen and pharmaceutical and personal care products from the effluent of waste water treatment plants using aerated solid-phase denitrification system. BIORESOURCE TECHNOLOGY 2019; 287:121389. [PMID: 31100567 DOI: 10.1016/j.biortech.2019.121389] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 04/25/2019] [Accepted: 04/27/2019] [Indexed: 06/09/2023]
Abstract
Nowadays, waste water treatment plants (WWTPs) are regarded as the pollution sources of nitrogen and pharmaceutical and personal care products (PPCPs). In the present study, the simultaneous removal of nitrogen and typical PPCPs, ibuprofen and triclosan, was evaluated in a poly-3-hydroxybutyrate-co-3-hydroxyvalerate (PHBV) based solid-phase denitrification (SPD) system. Results after 602 days showed that simultaneous nitrification and denitrification (SND) process occurred with average 83.85 ± 13.09% NH4+-N and 93.88 ± 10.19% NO3--N removals in the SPD system. Interestingly, the system achieved average 79.69 ± 6.35% and 65.96 ± 7.62% removals of ibuprofen and triclosan, respectively, under stable influent conditions of 50 μg L-1. Cometabolic activities of heterotrophic denitrifying bacteria and ammonia oxidizing bacteria (AOB) probably played a role in the biodegradation of the two PPCPs. Illumina MiSeq sequencing results revealed that microbial composition enhanced the simultaneous removal of nitrogen and PPCPs in the SPD system.
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Affiliation(s)
- Haimeng Sun
- Department of Environmental Science, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, PR China
| | - Ting Wang
- Department of Environmental Science, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, PR China; School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Zhongchen Yang
- Department of Environmental Science, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, PR China
| | - Cecilia Yu
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Weizhong Wu
- Department of Environmental Science, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, PR China.
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Chen J, Deng WJ, Liu YS, Hu LX, He LY, Zhao JL, Wang TT, Ying GG. Fate and removal of antibiotics and antibiotic resistance genes in hybrid constructed wetlands. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 249:894-903. [PMID: 30965541 DOI: 10.1016/j.envpol.2019.03.111] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 02/26/2019] [Accepted: 03/27/2019] [Indexed: 05/12/2023]
Abstract
Hybrid design and artificial aeration has been widely applied in wetlands, but little is known about their effectiveness in the removal of antibiotics and antibiotic resistance genes (ARGs). Here we investigated the performance of various mesocosm-scale constructed wetlands (CWs) with artificial aeration and hybrid design in removal of antibiotics and ARGs from antibiotics-spiked domestic sewage. Four hybrid constructed wetland systems with zeolite as substrate and Iris tectorum Maxim as plant were set up to have different artificial aeration designs. The aqueous removal efficiencies of total antibiotics ranged from 87.4% to 95.3%, while those of total ARGs varied from 87.8% to 99.1%. The mass removal of antibiotics by the CWs was attributed mainly to the microbial degradation. The present study imply that sorption of substrates and biological processes could be the two main mechanisms for ARGs elimination. The results from this study showed the hybrid CWs with artificial aeration could enhance treatment efficiencies of antibiotics and ARGs as well as conventional pollutants.
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Affiliation(s)
- Jun Chen
- The Environmental Research Institute, MOE Key Laboratory of Environmental Theoretical Chemistry, South China Normal University, Guangzhou, 510006, China
| | - Wen-Jing Deng
- Department of Science and Environmental Studies, The Education University of Hong Kong, Tai Po, N.T., Hong Kong Special Administrative, Region, China
| | - You-Sheng Liu
- The Environmental Research Institute, MOE Key Laboratory of Environmental Theoretical Chemistry, South China Normal University, Guangzhou, 510006, China
| | - Li-Xin Hu
- The Environmental Research Institute, MOE Key Laboratory of Environmental Theoretical Chemistry, South China Normal University, Guangzhou, 510006, China
| | - Liang-Ying He
- The Environmental Research Institute, MOE Key Laboratory of Environmental Theoretical Chemistry, South China Normal University, Guangzhou, 510006, China
| | - Jian-Liang Zhao
- The Environmental Research Institute, MOE Key Laboratory of Environmental Theoretical Chemistry, South China Normal University, Guangzhou, 510006, China
| | - Tuan-Tuan Wang
- The Environmental Research Institute, MOE Key Laboratory of Environmental Theoretical Chemistry, South China Normal University, Guangzhou, 510006, China; State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China
| | - Guang-Guo Ying
- The Environmental Research Institute, MOE Key Laboratory of Environmental Theoretical Chemistry, South China Normal University, Guangzhou, 510006, China.
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21
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Wang Y, Lin Z, Wang Y, Huang W, Wang J, Zhou J, He Q. Sulfur and iron cycles promoted nitrogen and phosphorus removal in electrochemically assisted vertical flow constructed wetland treating wastewater treatment plant effluent with high S/N ratio. WATER RESEARCH 2019; 151:20-30. [PMID: 30579051 DOI: 10.1016/j.watres.2018.12.005] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 11/24/2018] [Accepted: 12/07/2018] [Indexed: 06/09/2023]
Abstract
Phosphate (PO43--P) and nitrate (NO3--N) in the effluent of wastewater treatment plants are the predominant sources of eutrophication. In this study, a bench-scale electrochemically assisted vertical flow constructed wetland (E-VFCW) was developed, which exhibited favorable PO43--P (89.7-99.4%), NO3--N (82.7-99.6%), and TN (51.9-93.7%) removal efficiency in tertiary wastewater treatment. In addition, little N2O accumulation (0.32-2.19% of △NO3--N) was observed. The study further elucidated that PO43--P was removed mainly in the anode chamber by co-precipitation (Fe(n+)OH-PO4) and adsorption (FeOOH-PO4) pathways. Multi-pathway of NO3--N reduction was proposed, with 13.9-30.2% of NO3--N predominantly eliminated in the anode chamber by ferrous-dependent NO3--N reduction bacteria. In the cathode chamber, electrons storage and resupply modes during S cycle exerted crucial roles in NO3--N reduction, which enhanced the resilience capabilities of the E-VFCW to shock loadings. Stoichiometric analysis revealed that 3.3-6.6 mmol e-/cycle were stored in the form of S0, FeS, and FeS2 in the E-VFCW under longer HRT or higher current density. However, the deposited S resupplied 19.6% and 28.3% of electrons for NO3--N reduction under shorter HRT (1 h) or lower current density (0.01 mA cm-2). Moreover, ferrous-driven NO3--N-reducing or DNRA bacteria also promoted NO3--N elimination in the cathode chamber. These findings provide new insight into the coupling interactions among S, Fe and H cycles, as well as N and P transformations in electrochemically assisted NO3--N reduction systems.
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Affiliation(s)
- Yingmu Wang
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, China
| | - Ziyuan Lin
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, China
| | - Yue Wang
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, China
| | - Wei Huang
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, China
| | - Jiale Wang
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, China
| | - Jian Zhou
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, China.
| | - Qiang He
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, China.
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22
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Wu Y, He T, Chen C, Fang X, Wei D, Yang J, Zhang R, Han R. Impacting Microbial Communities and Absorbing Pollutants by Canna Indica and Cyperus Alternifolius in a Full-Scale Constructed Wetland System. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:E802. [PMID: 30841572 PMCID: PMC6427132 DOI: 10.3390/ijerph16050802] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 02/26/2019] [Accepted: 03/01/2019] [Indexed: 12/01/2022]
Abstract
Wetland plants that cover the wetlands play an important role in reducing pollutants. The aim of this study was to investigate the effect of two plant species on microbial communities and nitrogen-removal genes and to evaluate the contributions of absorbing pollutants by Canna indica (CI) and Cyperus alternifolius (CA) to the removal performance in both a vertical subsurface flow constructed wetland and a horizontal subsurface flow constructed wetland, which were part of a full-scale hybrid constructed wetland system. The microbial assemblages were determined using 16S rRNA high-throughput sequencing. Results showed that the presence of CI and CA positively affected microbial abundance and community in general and which was positive for the total bacteria and ammonia nitrogen removal in the CWs. The higher abundance of Nitrospirae appeared in the non-rhizosphere sediment (NRS) than that in the rhizosphere sediment (RS). More denitrification genes were found in NRS than in RS. The copy numbers of narG, nirS and nosZ genes for CA were higher than those for CI. Wetland plant species can significantly (P < 0.05) affect the distribution of microbial communities in RS. Plant selection is important to promote the development of microbial communities with a more active and diverse catabolic capability and the contribution of plant absorption to the overall removal rate of wetland system can be neglected.
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Affiliation(s)
- Yinghai Wu
- College of Marine and Civil Engineering, Dalian Ocean University, Dalian 116023, China.
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China.
| | - Tao He
- South China Institute of Environmental Science, Ministry of Environment Protection, Guangzhou 510655, China.
| | - Chen Chen
- South China Institute of Environmental Science, Ministry of Environment Protection, Guangzhou 510655, China.
| | - Xiaohang Fang
- South China Institute of Environmental Science, Ministry of Environment Protection, Guangzhou 510655, China.
| | - Dongyang Wei
- South China Institute of Environmental Science, Ministry of Environment Protection, Guangzhou 510655, China.
| | - Jing Yang
- South China Institute of Environmental Science, Ministry of Environment Protection, Guangzhou 510655, China.
| | - Renduo Zhang
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China.
| | - Rui Han
- College of Marine Technology and Environment, Dalian Ocean University, Dalian 116023, China.
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23
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Liu Y, Liu X, Li K, Lu S, Guo X, Zhang J, Xi B. Removal of nitrogen from low pollution water by long-term operation of an integrated vertical-flow constructed wetland: Performance and mechanism. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 652:977-988. [PMID: 30380502 DOI: 10.1016/j.scitotenv.2018.10.313] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Revised: 10/07/2018] [Accepted: 10/23/2018] [Indexed: 06/08/2023]
Abstract
The efficiency of nitrogen removal and its mechanism, aquatic organism distribution characteristics and regeneration capability of zeolite from an integrated vertical-flow constructed wetland (IVFCW) for low pollution water treatment were evaluated after steady and continuous operation for eight years. After running for eight years, better than average COD and NH4+-N removal were observed in the IVFCW. The NH4+-N removal rate in this system was controlled by ammoxidation and adsorption and ion exchange of zeolite. The low total nitrogen (TN) removal efficiency was due to NO3--N accumulation and zeolite desorption. In addition, this phenomenon indicated that because of poor organic carbon sources, nitrification was stronger than denitrification, consistent with the distribution of the functional genes for nitrification and denitrification. The biological activity in this system was abundant, especially that of spirogyra and navicula. The saturated adsorption capacity of zeolite was as high as 1.35 mg g-1 with a desorption rate of <20%. There were no obvious differences among the effects of aeration, water cleaning, drained reoxygenation and steam stripping for zeolite regeneration (adsorption capacity of >50%). However, the drained reoxygenation performance of was better due to zero energy consumption and regeneration in situ.
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Affiliation(s)
- Ying Liu
- State Environmental Protection Scientific Observation and Research Station for Lake Dongtinghu (SEPSORSLD), National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, State Key Laboratory of Environmental Criteria an Risk Assessment, Research Centre of Lake Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012, People's Republic of China
| | - Xiaohui Liu
- State Environmental Protection Scientific Observation and Research Station for Lake Dongtinghu (SEPSORSLD), National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, State Key Laboratory of Environmental Criteria an Risk Assessment, Research Centre of Lake Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012, People's Republic of China; School of Environment, Tsinghua University, Beijing 100084, People's Republic of China
| | - Ke Li
- State Environmental Protection Scientific Observation and Research Station for Lake Dongtinghu (SEPSORSLD), National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, State Key Laboratory of Environmental Criteria an Risk Assessment, Research Centre of Lake Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012, People's Republic of China; School of Environment, Beijing Normal University, Beijing 100088, People's Republic of China
| | - Shaoyong Lu
- State Environmental Protection Scientific Observation and Research Station for Lake Dongtinghu (SEPSORSLD), National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, State Key Laboratory of Environmental Criteria an Risk Assessment, Research Centre of Lake Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012, People's Republic of China.
| | - Xiaochun Guo
- State Environmental Protection Scientific Observation and Research Station for Lake Dongtinghu (SEPSORSLD), National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, State Key Laboratory of Environmental Criteria an Risk Assessment, Research Centre of Lake Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012, People's Republic of China
| | - Jian Zhang
- School of Environmental Science & Engineering, Shandong University, Jinan 250100, People's Republic of China
| | - Beidou Xi
- State Environmental Protection Scientific Observation and Research Station for Lake Dongtinghu (SEPSORSLD), National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, State Key Laboratory of Environmental Criteria an Risk Assessment, Research Centre of Lake Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012, People's Republic of China
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24
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Hu Z, Li D, Deng S, Liu Y, Ma C, Zhang C. Combination with catalyzed Fe(0)-carbon microelectrolysis and activated carbon adsorption for advanced reclaimed water treatment: simultaneous nitrate and biorefractory organics removal. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:5693-5703. [PMID: 30612352 DOI: 10.1007/s11356-018-3919-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 12/04/2018] [Indexed: 06/09/2023]
Abstract
A process combining catalyzed Fe(0)-carbon microelectrolysis (IC-ME) with activated carbon (AC) adsorption was developed for advanced reclaimed water treatment. Simultaneous nitrate reduction and chemical oxygen demand (COD) removal were achieved, and the effects of composite catalyst (CC) addition, AC addition, and initial pH were investigated. The reaction kinetics and reaction mechanisms were calculated and analyzed. The results showed that CC addition could enhance the reduction rate of nitrate and effectively inhibit the production of ammonia. Moreover, AC addition increased the adsorption capacity of biorefractory organic compounds (BROs) and enhanced the degradation of BRO. The reduction of NO3--N at different pH values was consistently greater than 96.9%, and NH4+-N was suppressed by high pH. The presence of CC ensured the reaction rate of IC-ME at high pH. The reaction kinetics orders and constants were calculated. Catalyzed iron scrap (IS)-AC showed much better nitrate reduction and BRO degradation performances than IS-AC and AC. The IC-ME showed great potential for application to nitrate and BRO reduction in reclaimed water.
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Affiliation(s)
- Zhifeng Hu
- School of Civil Engineering, Beijing Jiaotong University, Beijing, 100044, China
| | - Desheng Li
- School of Civil Engineering, Beijing Jiaotong University, Beijing, 100044, China.
- Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Beijing, 100044, People's Republic of China.
| | - Shihai Deng
- School of Civil Engineering, Beijing Jiaotong University, Beijing, 100044, China
- Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Beijing, 100044, People's Republic of China
| | - Yuanhui Liu
- School of Civil Engineering, Beijing Jiaotong University, Beijing, 100044, China
| | - Changyue Ma
- School of Civil Engineering, Beijing Jiaotong University, Beijing, 100044, China
| | - Chao Zhang
- School of Civil Engineering, Beijing Jiaotong University, Beijing, 100044, China
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25
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Yan Q, Xu Y, Yu Y, Zhu ZW, Feng G. Effects of pharmaceuticals on microbial communities and activity of soil enzymes in mesocosm-scale constructed wetlands. CHEMOSPHERE 2018; 212:245-253. [PMID: 30145416 DOI: 10.1016/j.chemosphere.2018.08.059] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 08/10/2018] [Accepted: 08/13/2018] [Indexed: 06/08/2023]
Abstract
Cyperus alternifolius based mesocosm-scale constructed wetland was employed to remove pharmaceuticals. We investigated the microbial community composition using phosphor lipid fatty acids (PFLAs) analysis and substrate enzyme activity during long-term exposure to pharmaceuticals in mesocosm-scale constructed wetlands. The results showed that there was no visible inhibition effect of pharmaceuticals on CW substrate enzymes activities in the experimental range (0-500 μg/L). Microbial communities, as revealed by PFLAs, were enhanced by the presence of plants, while the PFLAs content was highest when the pharmaceutical concentration was 10 μg/L or 30 μg/L at CWs. Except for anaerobic bacteria and Saturated fatty acids, the maximum PLFAs levels were reached when the pharmaceuticals were 10 μg/L or 30 μg/L, while Bacteria, G (-), fungal bacteria, Aerobic bacteria and Monounsaturated fatty acids were remarkably affected by high pharmaceuticals (100-500 μg/L). However, the main microbial florae were not changed among the treatments. In this study, the removal efficiencies of the studied pharmaceuticals in Planted (30) was greatest, which could be attributed to the higher microbial biomass. These results indicate that C. alternifolius can phytoremediate pharmaceutical-contaminated waters in CWs. Individual fatty acid cannot be used to represent specific species; therefore, more approaches to species identification such as rRNA-based methods must be included in future studies to better understand the metabolic mechanisms of microorganisms involved in the removal of studied pharmaceuticals and improve the performance of CWs.
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Affiliation(s)
- Qing Yan
- China National Rice Research Institute, Hangzhou, China; Laboratory of Quality & Safety Risk Assessment for Rice (Hangzhou), Ministry of Agriculture, Hangzhou 310006, China.
| | - Yufeng Xu
- College of Energy and Environmental Engineering, Hebei University of Engineering, Handan 056038, China
| | - Yonghong Yu
- China National Rice Research Institute, Hangzhou, China; Laboratory of Quality & Safety Risk Assessment for Rice (Hangzhou), Ministry of Agriculture, Hangzhou 310006, China
| | - Zhi Wei Zhu
- China National Rice Research Institute, Hangzhou, China; Laboratory of Quality & Safety Risk Assessment for Rice (Hangzhou), Ministry of Agriculture, Hangzhou 310006, China.
| | - Guozhong Feng
- China National Rice Research Institute, Hangzhou, China.
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26
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Li J, Ye W, Wei D, Ngo HH, Guo W, Qiao Y, Xu W, Du B, Wei Q. System performance and microbial community succession in a partial nitrification biofilm reactor in response to salinity stress. BIORESOURCE TECHNOLOGY 2018; 270:512-518. [PMID: 30248650 DOI: 10.1016/j.biortech.2018.09.068] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 09/11/2018] [Accepted: 09/12/2018] [Indexed: 06/08/2023]
Abstract
The system performance and microbial community succession in a partial nitrification biofilm reactor in response to salinity stress was conducted. It was found that the NH4+-N removal efficiency decreased from 98.4% to 42.0% after salinity stress increased to 20 g/L. Specific oxygen uptake rates suggested that AOB activity was more sensitive to the stress of salinity than that of NOB. Protein and polysaccharides contents showed an increasing tendency in both LB-EPS and TB-EPS after the salinity exposure. Moreover, EEM results indicated that protein-like substances were the main component in LB-EPS and TB-EPS as self-protection in response to salinity stress. Additionally, humic acid-like substances were identified as the main component in the effluent organic matter (EfOM) of partial nitrification biofilm, whereas fulvic acid-like substances were detected at 20 g/L salinity stress. Microbial community analysis found that Nitrosomonas as representative species of AOB were significantly inhibited under high salinity condition.
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Affiliation(s)
- Jibin Li
- School of Water Conservancy and Environment, University of Jinan, Jinan 250022, PR China
| | - Wei Ye
- School of Water Conservancy and Environment, University of Jinan, Jinan 250022, PR China
| | - Dong Wei
- School of Water Conservancy and Environment, University of Jinan, Jinan 250022, PR China.
| | - Huu Hao Ngo
- School of Civil and Environmental Engineering, University of Technology Sydney, Broadway, NSW 2007, Australia
| | - Wenshan Guo
- School of Civil and Environmental Engineering, University of Technology Sydney, Broadway, NSW 2007, Australia
| | - Yiming Qiao
- School of Water Conservancy and Environment, University of Jinan, Jinan 250022, PR China
| | - Weiying Xu
- School of Water Conservancy and Environment, University of Jinan, Jinan 250022, PR China
| | - Bin Du
- School of Water Conservancy and Environment, University of Jinan, Jinan 250022, PR China
| | - Qin Wei
- Key Laboratory of Chemical Sensing and Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, PR China
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27
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Zhao D, Zhang M, Liu Z, Sheng J, An S. Can cold-season macrophytes at the senescence stage improve nitrogen removal in integrated constructed wetland systems treating low carbon/nitrogen effluent? BIORESOURCE TECHNOLOGY 2018; 265:380-386. [PMID: 29929105 DOI: 10.1016/j.biortech.2018.06.020] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2018] [Revised: 06/05/2018] [Accepted: 06/08/2018] [Indexed: 06/08/2023]
Abstract
Cold-season macrophytes were configured in a system of stabilization ponds (SPs) and batch operation constructed wetlands (BCWs) to supply a carbon source for low carbon/nitrogen (C/N) effluent in spring and summer without generating secondary pollution during the decomposition process. For eutrophic water, the macrophyte configuration increased the average removal efficiency (RE) from 41.6% to 68.6% and from 70.2% to 83.7% for NO3--N and TN in the final BCW effluent, respectively, with the concentrations decreasing from 3.08 mg/L to 1.04 mg/L and from 4.94 mg/L to 3.12 mg/L, respectively. In the early decomposition stages, the RE and concentrations were 82.9% and 0.53 mg/L and 89.4% and 2.38 mg/L for NO3--N and TN, respectively. Thus, cold-season macrophytes can improve N removal in SP-BCW systems at the senescence stage, especially at the early decomposition stage.
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Affiliation(s)
- Dehua Zhao
- Department of Biological Science and Technology, Nanjing University, Nanjing 210093, China.
| | - Miao Zhang
- Department of Biological Science and Technology, Nanjing University, Nanjing 210093, China
| | - Zhe Liu
- Department of Biological Science and Technology, Nanjing University, Nanjing 210093, China
| | - Jing Sheng
- Circular Agriculture Research Center, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Shuqing An
- Department of Biological Science and Technology, Nanjing University, Nanjing 210093, China
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