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Niu J, Feng Y, Wang N, Liu S, Liang Y, Liu J, He W. Effects of high ammonia loading and in-situ short-cut nitrification in low carbon‑nitrogen ratio wastewater treatment by biocathode microbial electrochemical system. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 755:142641. [PMID: 33049541 DOI: 10.1016/j.scitotenv.2020.142641] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 09/20/2020] [Accepted: 09/25/2020] [Indexed: 06/11/2023]
Abstract
The microbial electrochemical system (MES) has great advantages in wastewater treatment for rapid chemical oxygen demand (COD) removal and low sludge yield rate. Herein, biocathode MES was proposed to remove COD from high-ammonia wastewater with low carbon‑nitrogen ratio and regulate the nitrogen forms in effluent for ANAMMOX process. The biocathode was more sensitive to ammonia nitrogen (NH4+-N) than anode and determined the power generation of MES. With COD of 500-550 mg L-1 in influent, increasing NH4+-N from 50 to 150 mg L-1 improved maximum power output (Pmax) from 3.0 ± 0.2 to 3.4 ± 0.1 W m-3, which was then reduced with further increase of NH4+-N from 300 to 600 mg L-1. However, for the cathodic reductive current, the negative effects of ammonia only revealed with NH4+-N ≥ 450 mg L-1. The cathodic equilibrium potential drop determined the power degradation, because the increased reductive compounds (NH4+ and COD) in catholyte. The high NH4+-N reduced the abundance of denitrifiers, exoelectrogens and organic-degrading bacteria on electrodes, while that of nitrogen-fixing bacteria increased. External alkalinity addition achieved in-situ short-cut nitrification and nitrite accumulation. With comparable NH4+ and NO2-, limited NO3- and low COD, the biocathode MES effluent was then suitable for subsequence ANAMMOX process.
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Affiliation(s)
- Jiaojiao Niu
- School of Environmental Science and Engineering, Academy of Ecology and Environment, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, China
| | - Yujie Feng
- School of Environmental Science and Engineering, Academy of Ecology and Environment, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, China
| | - Naiyu Wang
- School of Environmental Science and Engineering, Academy of Ecology and Environment, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, China
| | - Shujuan Liu
- School of Environmental Science and Engineering, Academy of Ecology and Environment, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, China
| | - Yuhai Liang
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
| | - Jia Liu
- School of Environmental Science and Engineering, Academy of Ecology and Environment, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, China
| | - Weihua He
- School of Environmental Science and Engineering, Academy of Ecology and Environment, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, China.
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Yao Y, Wang Z, Criddle CS. Robust Nitritation of Anaerobic Digester Centrate Using Dual Stressors and Timed Alkali Additions. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:2016-2026. [PMID: 33443415 DOI: 10.1021/acs.est.0c04613] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Nitrogen is commonly removed from wastewater by nitrification to nitrate followed by nitrate reduction to N2. Shortcut N removal saves energy by limiting ammonia oxidation to nitrite, but nitrite accumulation can be unstable. We hypothesized that repeated short-term exposures of ammonia-oxidizing communities to free ammonia (FA) and free nitrous acid (FNA) would stabilize nitritation by selecting against nitrite-oxidizing bacteria (NOB). Accordingly, we evaluated ammonium oxidation of anaerobic digester centrate in two bench-scale sequencing batch reactors (SBRs), seeded with the same inoculum and operated identically but with differing pH-control strategies. A single stressor SBR (SS/SBR) using pH set-point control produced HNO3, while a dual stressor SBR (DS/SBR) using timed alkalinity addition (TAA) produced HNO2 (ammonium removal efficiency of 97 ± 2%; nitrite accumulation ratio of 98 ± 1%). The TAA protocol was developed during an adaptation period with continuous pH monitoring. After adaptation, automated TAA enabled stable nitritation without set-point control. In the SS/SBR, repeatedly exposing the community to FA (8-10 h/exposure, one exposure/cycle) selected for FA-tolerant ammonia-oxidizing bacteria (Nitrosomonas sp. NM107) and NOB (Nitrobacter sp.). In the DS/SBR, repeatedly exposing the community to FA (2-4 h/exposure, three exposures/cycle) and FNA (4-6 h/exposure, two exposures/cycle) selected for FA- and FNA-resistant AOB (Nitrosomonas IWT514) and against NOB, stabilizing nitritation.
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Affiliation(s)
- Yinuo Yao
- Department of Civil and Environmental Engineering, Stanford University, Stanford, California 94305, United States
| | - Zhiyue Wang
- Department of Civil and Environmental Engineering, Stanford University, Stanford, California 94305, United States
| | - Craig S Criddle
- Department of Civil and Environmental Engineering, Stanford University, Stanford, California 94305, United States
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Noriega-Hevia G, Mateo O, Maciá A, Lardín C, Pastor L, Serralta J, Bouzas A. Experimental sulphide inhibition calibration method in nitrification processes: A case-study. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 274:111191. [PMID: 32798849 DOI: 10.1016/j.jenvman.2020.111191] [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: 04/07/2020] [Revised: 07/27/2020] [Accepted: 08/01/2020] [Indexed: 06/11/2023]
Abstract
Sulphide is one of the inhibitors in the nitrification process in WWTP in regions with sulphate rich soils. As little information is currently available on sulphide nitrification inhibition, the aim of this study was to develop a method based on a modification of the Successive Additions Method to calibrate the effect of sulphide on the activity of ammonia-oxidising bacteria (AOB) and nitrite-oxidising bacteria (NOB). The developed method was then applied to activated sludge samples from two WWTPs with different influent sulphide concentrations. In both cases, sulphide had a greater inhibitory effect on NOB than AOB activity. The sulphide inhibition was found to be lower in the activated sludge fed with sulphide-rich wastewater. The AOB and NOB activity measured at different sulphide concentrations could be accurately modelled with the Hill inhibition equation.
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Affiliation(s)
- G Noriega-Hevia
- CALAGUA, Unidad Mixta UV-UPV, Institut Universitari D'Investigació D'Enginyeria de L'Aigua I Medi Ambient, IIAMA, Universitat Politècnica de València, Camí de Vera S/n, 46022, València, Spain.
| | - O Mateo
- CALAGUA, Unidad Mixta UV-UPV, Institut Universitari D'Investigació D'Enginyeria de L'Aigua I Medi Ambient, IIAMA, Universitat Politècnica de València, Camí de Vera S/n, 46022, València, Spain
| | - A Maciá
- Depuración de Aguas Del Mediterráneo (DAM), Avenida Benjamín Franklin, 21. 46980 Parque Tecnológico, Paterna, Valencia, Spain
| | - C Lardín
- Entidad Regional de Saneamiento y Depuración de Aguas Residuales de La Región de Murcia (ESAMUR), C/Santiago Navarro, 4. Complejo Espinardo. 30.100, Espinardo, Murcia, Spain
| | - L Pastor
- Depuración de Aguas Del Mediterráneo (DAM), Avenida Benjamín Franklin, 21. 46980 Parque Tecnológico, Paterna, Valencia, Spain
| | - J Serralta
- CALAGUA, Unidad Mixta UV-UPV, Institut Universitari D'Investigació D'Enginyeria de L'Aigua I Medi Ambient, IIAMA, Universitat Politècnica de València, Camí de Vera S/n, 46022, València, Spain
| | - A Bouzas
- CALAGUA, Unidad Mixta UV-UPV, Departament D'Enginyeria Química, Universitat de València, Avinguda de La Universitat S/n, 46100, Burjassot, València, Spain
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Zhou N, Dang C, Zhao Z, He S, Zheng M, Liu W, Wang X. Role of sludge retention time in mitigation of nitrous oxide emission from a pilot-scale oxidation ditch. BIORESOURCE TECHNOLOGY 2019; 292:121961. [PMID: 31419708 DOI: 10.1016/j.biortech.2019.121961] [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: 06/25/2019] [Revised: 08/01/2019] [Accepted: 08/04/2019] [Indexed: 06/10/2023]
Abstract
Nitrous oxide (N2O) emission from wastewater treatment plants (WWTPs) has become a focus of attention due to its significant greenhouse effect. In this study, the role of sludge retention time (SRT) in mitigation of N2O emission from a pilot-scale oxidation ditch was systematically investigated. The activated sludge system that operated at SRT of 25 days demonstrated significantly lower N2O emission factor, higher resistance to ammonia overload and aeration failure shock than those obtained at SRT of 15 days no matter which hydraulic retention time (HRT) was adopted. Batch experiments revealed that nitrifier denitrification (ND) was the primary mechanism of N2O generation. However, more microbes affiliated with Nitrospira genera were harbored in the system at SRT 25 d, which could effectively avoid nitrite accumulation, a key factor promoting N2O generation by ND. PICRUSt results further suggested the system at SRT 25 d possessed higher genetic potential for N2O reduction reflected by the more abundant nitrous-oxide reductase.
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Affiliation(s)
- Nan Zhou
- MOE Key Laboratory of Regional Energy Systems Optimization, Environmental Research Academy, North China Electric Power University, Beijing 102206, China
| | - Chenyuan Dang
- Department of Environmental Engineering, Peking University, The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing 100871, China
| | - Zhirong Zhao
- MOE Key Laboratory of Regional Energy Systems Optimization, Environmental Research Academy, North China Electric Power University, Beijing 102206, China
| | - Shishi He
- MOE Key Laboratory of Regional Energy Systems Optimization, Environmental Research Academy, North China Electric Power University, Beijing 102206, China
| | - Maosheng Zheng
- MOE Key Laboratory of Regional Energy Systems Optimization, Environmental Research Academy, North China Electric Power University, Beijing 102206, China.
| | - Wen Liu
- Department of Environmental Engineering, Peking University, The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing 100871, China
| | - Xiangke Wang
- MOE Key Laboratory of Regional Energy Systems Optimization, Environmental Research Academy, North China Electric Power University, Beijing 102206, China
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Wang J, Wang L, Cui E, Lu H. Bioactivity kinetics of organic matter biodegradation and nitrification. KOREAN J CHEM ENG 2018. [DOI: 10.1007/s11814-018-0040-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Cao J, Yu Y, Xie K, Luo J, Feng Q, Fang F, Li C, Xue Z. Characterizing the free ammonia exposure to the nutrients removal in activated sludge systems. RSC Adv 2017. [DOI: 10.1039/c7ra10751j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
As a by-product during liquid production, the liquor wastewater exhibits tremendous environmental risks and may cause undesirable effects to the biological systems due to the high concentration of ammonia.
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Affiliation(s)
- Jiashun Cao
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes
- Ministry of Education
- Hohai University
- Nanjing 210098
- China
| | - Yunxiao Yu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes
- Ministry of Education
- Hohai University
- Nanjing 210098
- China
| | - Kun Xie
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes
- Ministry of Education
- Hohai University
- Nanjing 210098
- China
| | - Jingyang Luo
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes
- Ministry of Education
- Hohai University
- Nanjing 210098
- China
| | - Qian Feng
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes
- Ministry of Education
- Hohai University
- Nanjing 210098
- China
| | - Fang Fang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes
- Ministry of Education
- Hohai University
- Nanjing 210098
- China
| | - Chao Li
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes
- Ministry of Education
- Hohai University
- Nanjing 210098
- China
| | - Zhaoxia Xue
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes
- Ministry of Education
- Hohai University
- Nanjing 210098
- China
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Cho K, Shin SG, Lee J, Koo T, Kim W, Hwang S. Nitrification resilience and community dynamics of ammonia-oxidizing bacteria with respect to ammonia loading shock in a nitrification reactor treating steel wastewater. J Biosci Bioeng 2016; 122:196-202. [DOI: 10.1016/j.jbiosc.2016.01.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Revised: 01/19/2016] [Accepted: 01/20/2016] [Indexed: 11/29/2022]
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Xu GR, Tang JH, Li GB, Spinosa L. Enhanced organic pollutant removal influenced by activated-ferric-sludge. ENVIRONMENTAL TECHNOLOGY 2014; 35:2528-2537. [PMID: 25145208 DOI: 10.1080/09593330.2014.911754] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The primary goal of this study was to compare the pollutant removal efficiency of the reactivated activated-ferric-sludge (AFS) with that of the activated sludge (AS). Most tested organic pollutants were preferably removed by reactivated AFS. The optimal reactivated conditions for AFS were a reactivation time of 3 h, pH of 5-9, AFS dose of 5 g/L and dissolved oxygen of 2-6 mg/L. The results revealed a positive correlation between microbial activity and the removal efficiency of organic pollutants, with a higher microbial activity being associated with a better removal efficiency of organic pollutants. Additionally, variations in extracellular polymeric substances were found to be crucial to the microbial activity and adsorption capacity of reactivated AFS. After reactivation, reactivated AFS was superior to AS for the removal ofmost pollutants. Finally, the mechanism of AFS reactivation was investigated. Overall, the results of the present study demonstrate that reactivated AFS has the potential for widespread application in the removal of organic pollutants during the wastewater treatment process.
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Im J, Gil K. Effect of anaerobic digestion on the high rate of nitritation, treating piggery wastewater. J Environ Sci (China) 2011; 23:1787-1793. [PMID: 22432301 DOI: 10.1016/s1001-0742(10)60649-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The amount of piggery wastewater as domestic livestock is increasing. The volume of piggery wastewater produced is less than the volume of other wastewaters, but piggery wastewater has a heavy impact on wastewater streams due to an extremely high concentration of nitrogen and COD. In this study, laboratory reactors were operated using piggery wastewater and the effluent of anaerobic digester from piggery wastewater plants. The purpose of this study was to induce the nitritation process, which is an economically advantageous nitrogen removal method that converts ammonium nitrogen into nitrite. The results showed that the effluent of anaerobic digester from piggery wastewater was more efficient than raw piggery wastewater in terms of inducing nitritation. It can be deduced that nitritation is largely affected by an organic fraction of piggery wastewater. It can also be concluded that a small amount of biodegradable organic matter in piggery wastewater is efficient in inducing nitritation.
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Affiliation(s)
- Jiyeol Im
- Department of Civil Engineering, Seoul National University of Science and Technology, Seoul, South Korea.
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