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Wang X, Li W, Yang S, He Z, Li Y, Wang Y, Li J. Iron-dependent autotrophic denitrification as a novel microbial driven and iron-mediated denitrification process: A critical review. ENVIRONMENTAL RESEARCH 2025; 273:120808. [PMID: 39920964 DOI: 10.1016/j.envres.2025.120808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2024] [Revised: 12/30/2024] [Accepted: 01/08/2025] [Indexed: 02/10/2025]
Abstract
Based on previous research results, iron-dependent autotrophic denitrification (IDAD) was evaluated in an all-around way to provide a theoretical basis for further research. First, this review systematically and comprehensively summarizes the development of IDAD technology and describes the physiological properties of relevant functional microorganisms and their potential mechanisms from different perspectives. Second, the possible Fe-N pathways involved in the reaction of different iron-based materials are discussed in detail. Then, the theoretical advantages of the IDAD process and potential problems are described, and the corresponding control strategies are summarized. The influence of key factors on denitrification is discussed in terms of operational and water quality parameters. In addition, the application and research direction of this technology in engineering are summarized. Finally, the latest development trends and prospects for future applications are discussed to promote an in-depth understanding of IDAD and its practical application in sewage treatment.
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Affiliation(s)
- Xuechao Wang
- College of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, PR China
| | - Wenxuan Li
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, PR China; State Environmental Protection Key Laboratory of Ecological Effect and Risk Assessment of Chemicals, Chinese Research Academy of Environmental Sciences, Beijing, 100012, PR China.
| | - Shirong Yang
- College of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, PR China
| | - Zihan He
- College of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, PR China
| | - Yanyu Li
- College of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, PR China
| | - Yae Wang
- College of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, PR China
| | - Jie Li
- College of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, PR China
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Zhu X, Zhang X, Gao B, Ji L, Zhao R, Wu P. A critical review of Mnammox coupled with the NDMO for innovative nitrogen removal. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 951:175453. [PMID: 39137844 DOI: 10.1016/j.scitotenv.2024.175453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2024] [Revised: 08/08/2024] [Accepted: 08/09/2024] [Indexed: 08/15/2024]
Abstract
In the context of increasing global nitrogen pollution, traditional biological nitrogen removal technologies like nitrification and denitrification are hindered by high energy consumption. Additionally, the deployment of anaerobic ammonium oxidation (Anammox) technology is constrained due to the slow growth rate of Anammox bacteria and there is a bottleneck in nitrogen removal efficiency. To overcome these technical bottlenecks, researchers have discovered a revolutionary nitrogen removal technology that cleverly combines the redox cycling of manganese with nitrification and denitrification reactions. In this new process, manganese dependent anaerobic ammonium oxidation (Mnammox) bacteria can convert NH4+ to N2 under anaerobic conditions, while nitrate/nitrite dependent manganese oxidation (NDMO) bacteria use NO3-/NO2- as electron acceptors to oxidize Mn2+ to Mn4+. Mn4+ acts as an electron acceptor in Mnammox reaction, thereby realizing the autotrophic nitrogen removal process. This innovative method not only simplifies the steps of biological denitrification, but also significantly reduces the consumption of oxygen and organic carbon, providing a more efficient and environmentally friendly solution to the problem of nitrogen pollution. The article initially provides a concise overview of prevalent nitrogen removal technologies and the application of manganese in these processes, and discusses the role of manganese in biogeochemical cycles, including its discovery, mechanism of action, microbial communities involved, and its impact on these key factors in the process. Subsequently, metabolic principles, benefits, advantages, and environmental considerations of Mnammox coupled with the NDMO process are analyzed in detail. Finally, this article summarizes the shortcomings of current research and looks forward to future research directions. The goal of this article is to provide a valuable reference for researchers to fully understand the application of manganese in nitrogen removal processes.
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Affiliation(s)
- Xurui Zhu
- National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Xiaonong Zhang
- National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Bo Gao
- National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Luomiao Ji
- National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Rui Zhao
- National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Peng Wu
- National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China.
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3
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Ma X, Zhang XR, Sun YJ, Xi ZH, Liu JZ, Feng ZT, Zhou JM, Liu XT, Wang Y, Jin RC, Zhang QQ. Reason and control strategy for denitrification and anammox sludge flotation in nitrogen removal process: Mechanisms, strategies and perspectives. ENVIRONMENTAL RESEARCH 2024; 258:119456. [PMID: 38906445 DOI: 10.1016/j.envres.2024.119456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2024] [Revised: 06/07/2024] [Accepted: 06/18/2024] [Indexed: 06/23/2024]
Abstract
Anaerobic biological treatment technology, especially denitrification and anaerobic ammonia oxidation (anammox) technology as mainstream process, played dominant role in the field of biological wastewater treatment. However, the above process was prone to sludge floating during high load operation and thereby affecting the efficient and stable operation of the system. Excessive production of extracellular polymeric substance (EPS) was considered to be the main reason for anaerobic granular sludge flotation, but the summaries in this area were not comprehensive enough. In this review, the potential mechanisms of denitrification and anammox sludge floatation were discussed from the perspective of granular sludge structural characteristics, nutrient transfer, and microbial flora change respectively, and the corresponding control strategies were also summarized. Finally, this paper indicated that future research on sludge flotation should focus on reducing the negative effects of EPS in sludge particles.
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Affiliation(s)
- Xin Ma
- School of Water and Environment, Chang'an University, Xi'an 710054, China; Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of the Ministry of Education, Chang'an University, Xi'an 710054, China; Key Laboratory of Eco-hydrology and Water Security in Arid and Semi-arid Regions of Ministry of Water Resources, Chang'an University, Xi'an 710054, China
| | - Xin-Rui Zhang
- School of Water and Environment, Chang'an University, Xi'an 710054, China; Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of the Ministry of Education, Chang'an University, Xi'an 710054, China; Key Laboratory of Eco-hydrology and Water Security in Arid and Semi-arid Regions of Ministry of Water Resources, Chang'an University, Xi'an 710054, China
| | - Ying-Jun Sun
- School of Water and Environment, Chang'an University, Xi'an 710054, China; Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of the Ministry of Education, Chang'an University, Xi'an 710054, China; Key Laboratory of Eco-hydrology and Water Security in Arid and Semi-arid Regions of Ministry of Water Resources, Chang'an University, Xi'an 710054, China
| | - Zhi-Han Xi
- School of Water and Environment, Chang'an University, Xi'an 710054, China; Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of the Ministry of Education, Chang'an University, Xi'an 710054, China; Key Laboratory of Eco-hydrology and Water Security in Arid and Semi-arid Regions of Ministry of Water Resources, Chang'an University, Xi'an 710054, China
| | - Jin-Ze Liu
- School of Water and Environment, Chang'an University, Xi'an 710054, China; Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of the Ministry of Education, Chang'an University, Xi'an 710054, China; Key Laboratory of Eco-hydrology and Water Security in Arid and Semi-arid Regions of Ministry of Water Resources, Chang'an University, Xi'an 710054, China
| | - Ze-Tong Feng
- School of Water and Environment, Chang'an University, Xi'an 710054, China; Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of the Ministry of Education, Chang'an University, Xi'an 710054, China; Key Laboratory of Eco-hydrology and Water Security in Arid and Semi-arid Regions of Ministry of Water Resources, Chang'an University, Xi'an 710054, China
| | - Jia-Min Zhou
- School of Water and Environment, Chang'an University, Xi'an 710054, China; Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of the Ministry of Education, Chang'an University, Xi'an 710054, China; Key Laboratory of Eco-hydrology and Water Security in Arid and Semi-arid Regions of Ministry of Water Resources, Chang'an University, Xi'an 710054, China
| | - Xin-Tao Liu
- School of Water and Environment, Chang'an University, Xi'an 710054, China; Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of the Ministry of Education, Chang'an University, Xi'an 710054, China; Key Laboratory of Eco-hydrology and Water Security in Arid and Semi-arid Regions of Ministry of Water Resources, Chang'an University, Xi'an 710054, China
| | - Ying Wang
- School of Water and Environment, Chang'an University, Xi'an 710054, China; Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of the Ministry of Education, Chang'an University, Xi'an 710054, China; Key Laboratory of Eco-hydrology and Water Security in Arid and Semi-arid Regions of Ministry of Water Resources, Chang'an University, Xi'an 710054, China
| | - Ren-Cun Jin
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
| | - Qian-Qian Zhang
- School of Water and Environment, Chang'an University, Xi'an 710054, China; Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of the Ministry of Education, Chang'an University, Xi'an 710054, China; Key Laboratory of Eco-hydrology and Water Security in Arid and Semi-arid Regions of Ministry of Water Resources, Chang'an University, Xi'an 710054, China.
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Jian C, Hao Y, Liu R, Qi X, Chen M, Liu N. Mixotrophic denitrification process driven by lime sulfur and butanediol: Denitrification performance and metagenomic analysis. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 903:166654. [PMID: 37647948 DOI: 10.1016/j.scitotenv.2023.166654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 08/24/2023] [Accepted: 08/26/2023] [Indexed: 09/01/2023]
Abstract
Heterotrophic sulfur-based autotrophic denitrification is a promising biological denitrification technology for low COD/TN (C/N) wastewater due to its high efficiency and low cost. Compared to the conventional autotrophic denitrification process driven by elemental sulfur, the presence of polysulfide in the system can promote high-speed nitrogen removal. However, autotrophic denitrification mediated by polysulfide has not been reported. This study investigated the denitrification performance and microbial metabolic mechanism of heterotrophic denitrification, sulfur-based autotrophic denitrification, and mixotrophic denitrification using lime sulfur and butanediol as electron donors. When the influent C/N was 1, the total nitrogen removal efficiency of the mixotrophic denitrification process was 1.67 and 1.14 times higher than that of the heterotrophic and sulfur-based autotrophic denitrification processes, respectively. Microbial community alpha diversity and principal component analysis indicated different electron donors lead to different evolutionary directions in microbial communities. Metagenomic analysis showed the enriched denitrifying bacteria (Thauera, Pseudomonas, and Pseudoxanthomonas), dissimilatory nitrate reduction to ammonia bacteria (Hydrogenophaga), and sulfur oxidizing bacteria (Thiobacillus) can stably support nitrate reduction. Analysis of metabolic pathways revealed that complete denitrification, dissimilatory nitrate reduction to ammonia, and sulfur disproportionation are the main pathways of the N and S cycle. This study demonstrates the feasibility of a mixotrophic denitrification process driven by a combination of lime sulfur and butanediol as a cost-effective solution for treating nitrogen pollution in low C/N wastewater and elucidates the N and S metabolic pathways involved.
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Affiliation(s)
- Chuanqi Jian
- Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou 510632, Guangdong, China
| | - Yanru Hao
- Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou 510632, Guangdong, China
| | - Rentao Liu
- School of Environment, Jinan University, Guangzhou 510632, Guangdong, China
| | - Xiaochen Qi
- Institute for Environmental and Climate Research, Jinan University, Guangzhou 511443, Guangdong, China
| | - Minmin Chen
- Guangdong Environmental Protection Engineering Vocational College, Guangzhou 510655, Guangdong, China
| | - Na Liu
- Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou 510632, Guangdong, China.
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5
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Wang Y, Ren S, Wang P, Wang B, Hu K, Li J, Wang Y, Li Z, Li S, Li W, Peng Y. Autotrophic denitrification using Fe(II) as an electron donor: A novel prospective denitrification process. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 858:159721. [PMID: 36306837 DOI: 10.1016/j.scitotenv.2022.159721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 10/21/2022] [Accepted: 10/21/2022] [Indexed: 06/16/2023]
Abstract
As a newly identified nitrogen loss pathway, the nitrate-dependent ferrous oxidation (NDFO) process is emerging as a research hotspot in the field of low carbon to nitrogen ratio (C/N) wastewater treatment. This review article provides an overview of the NDFO process and summarizes the functional microorganisms associated with NDFO from different perspectives. The potential mechanisms by which external factors such as influent pH, influent Fe(II)/N (mol), organic carbon, and chelating agents affect NDFO performance are also thoroughly discussed. As the electron-transfer mechanism of the NDFO process is still largely unknown, the extensive chemical Fe(II)-oxidizing nitrite-reducing pathway (NDFOchem) of the NDFO process is described here, and the potential enzymatic electron transfer mechanisms involved are summarized. On this basis, a three-stage electron transfer pathway applicable to low C/N wastewater is proposed. Furthermore, the impact of Fe(III) mineral products on the NDFO process is revisited, and existing crusting prevention strategies are summarized. Finally, future challenges facing the NDFO process and new research directions are discussed, with the aim of further promoting the development and application of the NDFO process in the field of nitrogen removal.
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Affiliation(s)
- Yaning Wang
- College of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China; Key laboratory of Yellow River Water Environment in Gansu Province, Lanzhou 730070, China
| | - Shuang Ren
- College of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China; Key laboratory of Yellow River Water Environment in Gansu Province, Lanzhou 730070, China
| | - Peng Wang
- College of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China; Key laboratory of Yellow River Water Environment in Gansu Province, Lanzhou 730070, China.
| | - Bo Wang
- School of Geosciences, China University of Petroleum, Qingdao 266580, China
| | - Kaiyao Hu
- College of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China; Key laboratory of Yellow River Water Environment in Gansu Province, Lanzhou 730070, China
| | - Jie Li
- College of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China; Key laboratory of Yellow River Water Environment in Gansu Province, Lanzhou 730070, China; Gansu membrane science and technology research institute Co.,Ltd., Lanzhou 730020, China; Key Laboratory for Resources Utilization Technology of Unconventional Water of Gansu Province, Lanzhou 730020, China
| | - Yae Wang
- College of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China; Key laboratory of Yellow River Water Environment in Gansu Province, Lanzhou 730070, China
| | - Zongxing Li
- Key Laboratory of Ecohydrology of Inland River Basin/Gansu Qilian Mountains Ecology Research Center, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Sumei Li
- College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
| | - Wang Li
- Taiyuan university of technology, Taiyuan 030024, China; State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan 030024, China
| | - Yuzhuo Peng
- College of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China; Key laboratory of Yellow River Water Environment in Gansu Province, Lanzhou 730070, China
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6
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Zhang J, Fan C, Zhao M, Wang Z, Jiang S, Jin Z, Bei K, Zheng X, Wu S, Lin P, Miu H. A comprehensive review on mixotrophic denitrification processes for biological nitrogen removal. CHEMOSPHERE 2023; 313:137474. [PMID: 36493890 DOI: 10.1016/j.chemosphere.2022.137474] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 11/18/2022] [Accepted: 12/03/2022] [Indexed: 06/17/2023]
Abstract
Biological denitrification is the most widely used method for nitrogen removal in water treatment. Compared with heterotrophic and autotrophic denitrification, mixotrophic denitrification is later studied and used. Because mixotrophic denitrification can overcome some shortcomings of heterotrophic and autotrophic denitrification, such as a high carbon source demand for heterotrophic denitrification and a long start-up time for autotrophic denitrification. It has attracted extensive attention of researchers and is increasingly used in biological nitrogen removal processes. However, so far, a comprehensive review is lacking. This paper aims to review the current research status of mixotrophic denitrification and provide guidance for future research in this field. It is shown that mixotrophic denitrification processes can be divided into three main kinds based on different kinds of electron donors, mainly including sulfur-, hydrogen-, and iron-based reducing substances. Among them, sulfur-based mixotrophic denitrification is the most widely studied. The most concerned influencing factors of mixotrophic denitrification processes are hydraulic retention times (HRT) and ratio of chemical oxygen demand (COD) to total inorganic nitrogen (C/N). The dominant functional bacteria of sulfur-based mixotrophic denitrification system are Thiobacillus, Azoarcus, Pseudomonas, and Thauera. At present, mixotrophic denitrification processes are mainly applied for nitrogen removal in drinking water, groundwater, and wastewater treatment. Finally, challenges and future research directions are discussed.
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Affiliation(s)
- Jintao Zhang
- College of Life and Environmental Science, Wenzhou University, Wenzhou, Zhejiang, 325035, PR China; National and Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution, Wenzhou, Zhejiang, 325035, PR China; Zhejiang Provincial Key Lab for Water Environment and Marine Biological Resources Protection, Wenzhou, Zhejiang, 325035, PR China
| | - Chunzhen Fan
- College of Life and Environmental Science, Wenzhou University, Wenzhou, Zhejiang, 325035, PR China; National and Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution, Wenzhou, Zhejiang, 325035, PR China; Zhejiang Provincial Key Lab for Water Environment and Marine Biological Resources Protection, Wenzhou, Zhejiang, 325035, PR China
| | - Min Zhao
- College of Life and Environmental Science, Wenzhou University, Wenzhou, Zhejiang, 325035, PR China; National and Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution, Wenzhou, Zhejiang, 325035, PR China; Zhejiang Provincial Key Lab for Water Environment and Marine Biological Resources Protection, Wenzhou, Zhejiang, 325035, PR China
| | - Zhiquan Wang
- College of Life and Environmental Science, Wenzhou University, Wenzhou, Zhejiang, 325035, PR China; National and Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution, Wenzhou, Zhejiang, 325035, PR China; Zhejiang Provincial Key Lab for Water Environment and Marine Biological Resources Protection, Wenzhou, Zhejiang, 325035, PR China
| | - Shunfeng Jiang
- College of Life and Environmental Science, Wenzhou University, Wenzhou, Zhejiang, 325035, PR China; National and Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution, Wenzhou, Zhejiang, 325035, PR China; Zhejiang Provincial Key Lab for Water Environment and Marine Biological Resources Protection, Wenzhou, Zhejiang, 325035, PR China
| | - Zhan Jin
- College of Life and Environmental Science, Wenzhou University, Wenzhou, Zhejiang, 325035, PR China; National and Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution, Wenzhou, Zhejiang, 325035, PR China; Zhejiang Provincial Key Lab for Water Environment and Marine Biological Resources Protection, Wenzhou, Zhejiang, 325035, PR China
| | - Ke Bei
- College of Life and Environmental Science, Wenzhou University, Wenzhou, Zhejiang, 325035, PR China; National and Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution, Wenzhou, Zhejiang, 325035, PR China; Zhejiang Provincial Key Lab for Water Environment and Marine Biological Resources Protection, Wenzhou, Zhejiang, 325035, PR China
| | - Xiangyong Zheng
- College of Life and Environmental Science, Wenzhou University, Wenzhou, Zhejiang, 325035, PR China; National and Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution, Wenzhou, Zhejiang, 325035, PR China; Zhejiang Provincial Key Lab for Water Environment and Marine Biological Resources Protection, Wenzhou, Zhejiang, 325035, PR China.
| | - Suqing Wu
- College of Life and Environmental Science, Wenzhou University, Wenzhou, Zhejiang, 325035, PR China; National and Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution, Wenzhou, Zhejiang, 325035, PR China; Zhejiang Provincial Key Lab for Water Environment and Marine Biological Resources Protection, Wenzhou, Zhejiang, 325035, PR China.
| | - Ping Lin
- Wenzhou Drainage Co., Ltd, Wenzhou, Zhejiang, 325000, PR China
| | - Huanyi Miu
- Wenzhou Ecological Park Development and Construction Investment Group Co., Ltd, Wenzhou, Zhejiang, 325000, PR China
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Wang Y, Wu G, Zheng X, Mao W, Guan Y. Synergistic ammonia and nitrate removal in a novel pyrite-driven autotrophic denitrification biofilter. BIORESOURCE TECHNOLOGY 2022; 355:127223. [PMID: 35483533 DOI: 10.1016/j.biortech.2022.127223] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 04/20/2022] [Accepted: 04/21/2022] [Indexed: 06/14/2023]
Abstract
Pyrite is one kind of cost-effective electron donors for nitrate denitrification. In this study, a pyrite-driven autotrophic denitrification biofilter was applied for simultaneous removal of NH4+ and NO3- over the 150-day. The influent NH4+/NO3- ratio (0.3-1.7) had less effect on system performance, while for the hydraulic retention times (HRTs, 24-3 h), the removal percentage of both > 90% and removal loading rates of 52.8 and 59.4 mg N/(L·d) for NH4+ and NO3- removal were obtained at the HRT of 6 h. The 16S rRNA genes analysis showed that Ferritrophicum, Thiobacillus, Candidatus_Brocadia, and unidentified_Nitrospiraceae were predominant. Analyses of nitrogen and sulfur metabolism showed that ammonia was removed by complete nitrification, nitrate was reduced to N2, and sulfide was oxidized to sulfate. Dynamics of pollutants within the reactor and microbial activity showed nitrification/Anammox and pyrite-driven autotrophic denitrification were responsible for the synergistic removal of NH4+/NO3- in this system.
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Affiliation(s)
- Yanfei Wang
- Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, International Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, PR China; State Environmental Protection Key Laboratory of Microorganism Application and Risk Control, School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Guangxue Wu
- Civil Engineering, School of Engineering, College of Science and Engineering, National University of Ireland, Galway, Galway H91 TK33, Ireland
| | - Xiaona Zheng
- Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, International Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, PR China; State Environmental Protection Key Laboratory of Microorganism Application and Risk Control, School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Wei Mao
- Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, International Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, PR China; State Environmental Protection Key Laboratory of Microorganism Application and Risk Control, School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Yuntao Guan
- Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, International Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, PR China; State Environmental Protection Key Laboratory of Microorganism Application and Risk Control, School of Environment, Tsinghua University, Beijing 100084, PR China.
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8
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Zheng Z, Ali A, Su J, Zhang S, Su L, Qi Z. Biochar fungal pellet based biological immobilization reactor efficiently removed nitrate and cadmium. CHEMOSPHERE 2022; 296:134011. [PMID: 35181434 DOI: 10.1016/j.chemosphere.2022.134011] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 02/06/2022] [Accepted: 02/13/2022] [Indexed: 06/14/2023]
Abstract
To efficiently and simultaneously remove nitrate (NO3--N) and Cd(II) from aqueous solution, a novel type of biochar fungal pellet (BFP) immobilized denitrification bacteria (Cupriavidus sp. H29) composite was used in a bioreactor. The removal performance of the bioreactor R1 for the initial concentration of 27.7 mg L-1 nitrate and 10.0 mg L-1 Cd(II) reached 98.1 and 93.9% respectively, and the inoculation of strain H29 in bioreactor R1 significantly enhanced the removal efficiency of contaminants. The 3D-EEM spectra analysis showed that the activity of microorganisms in the bioreactor was higher at a lower concentration of Cd(II). FTIR indicated the effect of functional groups in BFP in bioadsorption of Cd(II). In addition, high-throughput analysis of species composition of the microbial community in the bioreactors at different levels demonstrated that strain H29 played a significant part in the bioreactor. This research provided a perspective for simultaneous restoration of nitrate and heavy metals in wastewater, and also enriched the application of fungal pellet (FP) in reactors.
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Affiliation(s)
- Zhijie Zheng
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Amjad Ali
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Junfeng Su
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China.
| | - Shuai Zhang
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Lindong Su
- Xi'an Yiwei Putai Environmental Protection Co., LTD, Xi'an, 710055, China
| | - Zening Qi
- Xi'an Yiwei Putai Environmental Protection Co., LTD, Xi'an, 710055, China
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9
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Hao W, Li Q, Liu P, Han J, Duan R, Liang P. A new inoculation method of sulfur autotrophic denitrification reactor for accelerated start-up and better low-temperature adaption. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 823:153657. [PMID: 35122857 DOI: 10.1016/j.scitotenv.2022.153657] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 01/30/2022] [Accepted: 01/30/2022] [Indexed: 06/14/2023]
Abstract
Elemental sulfur (S0) autotrophic denitrification (SAD) has been proved feasible for nitrate removal from aquatic environments. The long start-up period up to weeks of the SAD reactor impedes its industrial application. To accelerate the start-up process, this study employed S0 powder packed sequencing batch reactor operated for 10 days to obtain a seed biofilm, which was inoculated into a regular S0 flake packed bed reactor afterwards. Merely two days after inoculation, the reactor inoculated with seed biofilm was well started up and outperformed the control reactor, which was inoculated with regular anaerobic sludge and operated for more than 10 days, delivering much increased denitrification rate of 126 ± 0.68 mg N/(L·d) and a high nitrate removal efficiency of 93.0%. Batch tests during the start-up period showed that the seed biofilm developed well on S0 flakes and delivered improved nitrate removal performance than the control. Extracellular polymeric substance (EPS) analysis revealed an abundant content of protein in tightly bound EPS in the biofilm developed from the seed biofilm, which was recognized as a major contributor to facilitate the biofilm's attachment and growth onto S0 flakes. After operating under moderate temperature, the reactors were tested at a reduced temperature of 15 °C. Results indicated that the reactor inoculated with seed biofilm showed stronger adaptation ability towards low temperature and sustained better denitrification performance than the control, which was attributed to increased protein content in tightly bound EPS produced by the microbes against low-temperature. Determination of the microbial communities in tested reactors when the whole experiment was closing found that sulfur-related genera were dominating in the packed-bed reactor inculcated with seed biofilm, which played an important role in the S0-based denitrification process.
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Affiliation(s)
- Wen Hao
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Qingcheng Li
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Panpan Liu
- School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, PR China
| | - Jinbing Han
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Rui Duan
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Peng Liang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China.
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10
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El-Lateef HMA, Khalaf MM, Al-Fengary AED, Elrouby M. Removal of the Harmful Nitrate Anions from Potable Water Using Different Methods and Materials, including Zero-Valent Iron. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27082552. [PMID: 35458747 PMCID: PMC9031846 DOI: 10.3390/molecules27082552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Revised: 04/12/2022] [Accepted: 04/13/2022] [Indexed: 11/16/2022]
Abstract
Drinking water containing nitrate ions at a higher concentration level of more than 10 mg/L, according to the World Health Organization (WHO), poses a considerable peril to humans. This danger lies in its reduction of nitrite ions. These ions cause methemoglobinemia during the oxidation of hemoglobin into methemoglobin. Many protocols can be applied to the remediation of nitrate ions from hydra solutions such as Zn metal and amino sulfonic acid. Furthermore, the electrochemical process is a potent protocol that is useful for this purpose. Designing varying parameters, such as the type of cathodic electrode (Sn, Al, Fe, Cu), the type of electrolyte, and its concentration, temperature, pH, and current density, can give the best conditions to eliminate the nitrate as a pollutant. Moreover, the use of accessible, functional, and inexpensive adsorbents such as granular ferric hydroxide, modified zeolite, rice chaff, chitosan, perlite, red mud, and activated carbon are considered a possible approach for nitrate removal. Additionally, biological denitrification is considered one of the most promising methodologies attributable to its outstanding performance. Among these powerful methods and materials exist zero-valent iron (ZVI), which is used effectively in the deletion process of nitrate ions. Non-precious synthesis pathways are utilized to reduce the Fe2+ or Fe3+ ions by borohydride to obtain ZVI. The structural and morphological characteristics of ZVI are elucidated using UV–Vis spectroscopy, zeta potential, XRD, FE-SEM, and TEM. The adsorptive properties are estimated through batch experiments, which are achieved to control the feasibility of ZVI as an adsorbent under the effects of Fe0 dose, concentration of NO3− ions, and pH. The obtained literature findings recommend that ZVI is an appropriate applicant adsorbent for the remediation of nitrate ions.
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Affiliation(s)
- Hany M. Abd El-Lateef
- Department of Chemistry, College of Science, King Faisal University, P.O. Box 400, Al-Ahsa 31982, Saudi Arabia;
- Chemistry Department, Faculty of Science, Sohag University, Sohag 82425, Egypt;
- Correspondence: or (H.M.A.E.-L.); or (M.E.)
| | - Mai M. Khalaf
- Department of Chemistry, College of Science, King Faisal University, P.O. Box 400, Al-Ahsa 31982, Saudi Arabia;
- Chemistry Department, Faculty of Science, Sohag University, Sohag 82425, Egypt;
| | | | - Mahmoud Elrouby
- Chemistry Department, Faculty of Science, Sohag University, Sohag 82425, Egypt;
- Faculty of Science, King Salman International University, Sinai 46612, Egypt
- Correspondence: or (H.M.A.E.-L.); or (M.E.)
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11
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Bai Y, Su J, Ali A, Chang Q, Gao Z, Wang Y, Liu Y. Insights into the mechanism of Mn(II)-based autotrophic denitrification: Performance, genomic, and metabonomics. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 810:151185. [PMID: 34699810 DOI: 10.1016/j.scitotenv.2021.151185] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 10/19/2021] [Accepted: 10/20/2021] [Indexed: 06/13/2023]
Abstract
The technologies for groundwater nitrate pollution treatment have drawn increasing global attention. As for autotrophic denitrification (AD), most researches aimed to the mixed microbial culture bioreactors, the mechanism of AD by purely cultured bacteria has not been fully investigated yet. Here, denitrification ability, bacterial activity, and dissolved organic matter evolution of Cupriavidus sp. HY129 in both AD and heterotrophic denitrification (HD) were studied. Genomic analysis and microbial metabolomic analysis were applied to explore the mechanism of AD and the difference and intrinsic factors in AD and HD. The results revealed that HD resulted in higher denitrification efficiency and biomass compared to AD and the bacteria preferred to synthesize humic-like proteins to maintain the progress of AD. Bacteria carry out Mn oxidation outside the bacteria cell and transfer electrons into the cell for AD. Cupriavidus sp. HY129 genome has critical metabolic pathways in both autotrophic and heterotrophic conditions, as well as the MCO gene for mediating the Mn oxidation. Energy metabolism pathways were the most significantly differences between AD and HD. Moreover, sphingolipid metabolism and mineral absorption metabolism were the most essential pathways in the autotrophic process to maintain the normal physiological activities and Mn transfer. The results explored the differences between AD and HD pathways in the same bacteria for the first time and provided new insight into understanding the metabolic characteristics of different denitrification, which provide useful information to the global nitrogen cycle and nitrate pollution treatment.
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Affiliation(s)
- Yihan Bai
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Junfeng Su
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
| | - Amjad Ali
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Qiao Chang
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Zhihong Gao
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Yue Wang
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Yu Liu
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
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12
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Chen X, Yang L, Chen F, Song Q, Feng C, Liu X, Li M. High efficient bio-denitrification of nitrate contaminated water with low ammonium and sulfate production by a sulfur/pyrite-based bioreactor. BIORESOURCE TECHNOLOGY 2022; 346:126669. [PMID: 34995779 DOI: 10.1016/j.biortech.2021.126669] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Revised: 12/29/2021] [Accepted: 12/30/2021] [Indexed: 06/14/2023]
Abstract
Sulfur-based autotrophic denitrification (SAD) and pyrite-based autotrophic denitrification (PAD) are important technologies that address nitrate pollution, but high sulfate production and low denitrification efficiency, respectively, limit their application in engineering. A bio-denitrification reactor with sulfur and pyrite as filler materials was studied to remove NO3--N from nitrate contaminated water. At an influent NO3--N concentration of 50 mg/L, NO3--N removal efficiency of the sulfur/pyrite-based bioreactor was 99.2%, producing less NH4+-N and SO42- than the sulfur-based bioreactor, even after long-term operation. Denitrification performance was significantly related to environmental variable, especially dissolved oxygen. Proteobacteria and Epsilonbacteraeota were the predominant phyla in the sulfur/pyrite-based bioreactor, and fewer dissimilatory nitrate reductions to ammonia process-related bacteria were enriched compared to those in the sulfur-based bioreactor. Sulfur-pyrite bio-denitrification provides an efficient alternative method for treatment of nitrate contaminated water.
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Affiliation(s)
- Xiaoyu Chen
- School of Environment, Tsinghua University, Beijing 100084, PR China; School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, PR China
| | - Lei Yang
- School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Fei Chen
- School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Qinan Song
- School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Chuanping Feng
- School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, PR China
| | - Xiang Liu
- School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Miao Li
- School of Environment, Tsinghua University, Beijing 100084, PR China.
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13
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Zhao F, Xin J, Yuan M, Wang L, Wang X. A critical review of existing mechanisms and strategies to enhance N 2 selectivity in groundwater nitrate reduction. WATER RESEARCH 2022; 209:117889. [PMID: 34936974 DOI: 10.1016/j.watres.2021.117889] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 11/02/2021] [Accepted: 11/19/2021] [Indexed: 06/14/2023]
Abstract
The pollution of nitrate (NO3-) in groundwater has become an environmental problem of general concern and requires immediate remediation because of adverse human and ecological impacts. NO3- removal from groundwater is conducted mainly by chemical, biological, and coupled methods, with the removal efficiency of NO3- considered the sole performance indicator. However, in addition to the harmless form of N2, the reduced NO3- could be transformed into other intermediates, such as nitrite (NO2-), nitrous oxide (N2O), and ammonia (NH4+), which may have direct or indirect negative impacts on the environment. Therefore, increasing N2 selectivity is a significant challenge in reducing NO3- in groundwater, which seriously impedes the large-scale implementation of available remediation technologies. In this work, we comprehensively overview the most recent advances in N2 selectivity regarding the understanding of emerging groundwater NO3- removal technologies. Mechanisms of by-product production and strategies to enhance the selective reduction of NO3- to N2 are discussed in detail. Furthermore, we proposed topics for further research and hope that the total environmental impacts of remediation schemes should be evaluated comprehensively by quantifying all potential intermediate products, and promising strategies should be further developed to enhance N2 selectivity, to improve the feasibility of related technologies in actual remediation.
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Affiliation(s)
- Fang Zhao
- Key Lab of Marine Environmental Science and Ecology, Ministry of Education, Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Jia Xin
- Key Lab of Marine Environmental Science and Ecology, Ministry of Education, Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China.
| | - Mengjiao Yuan
- Key Lab of Marine Environmental Science and Ecology, Ministry of Education, Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Litao Wang
- Key Lab of Marine Environmental Science and Ecology, Ministry of Education, Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Xiaohui Wang
- Key Lab of Marine Environmental Science and Ecology, Ministry of Education, Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
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14
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Liu Y, Liu Y, Shi Y, He Q, Li Q, Wan D, Zhou J. Using a sulfur autotrophic fluidized bed reactor for simultaneous perchlorate and nitrate removal from water: S disproportionation prediction and system optimization. Biodegradation 2021; 32:627-642. [PMID: 34318374 DOI: 10.1007/s10532-021-09957-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 07/21/2021] [Indexed: 11/26/2022]
Abstract
The sulfur autotrophic reduction (SAR) process is promising in co-reduction of perchlorate and nitrate from aqueous solution. To further understand the reaction process, we developed a sulfur autotrophic fluidized bed reactor where the proceeding extent of sulfur (S) disproportionation was predicted by Response surface methodology (RSM) for the first time. Three fundamental reaction parameters including the hydraulic retention time (HRT), co-existing nitrate concentration ([Formula: see text]) and recirculation ratio (R) were considered for reactor optimization. The results demonstrated that S disproportionation was promoted by long HRT and high R, whereas was inhibited by high [Formula: see text]. Also, the optimal HRT, [Formula: see text] and R were 0.50 h, 10.00 mg/L and 14, respectively, the bioreactor can achieve high reduction efficiency of perchlorate and nitrate (> 98.45%), and generate less sulfate (236.07 mg/L). High-throughput sequencing showed that Chlorobaculum was related to S disproportionation, and Sulfurovum was associated with nitrate/perchlorate reducing. All results indicate that the sulfur autotrophic fluidized bed reactor is a promising candidate for the treatment of perchlorate and nitrate wastewater in future practical applications.
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Affiliation(s)
- Yongde Liu
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, 450001, Henan, China
| | - Yang Liu
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, 450001, Henan, China
| | - Yahui Shi
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, 450001, Henan, China
| | - Qiaochong He
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, 450001, Henan, China
| | - Qi Li
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, 450001, Henan, China
| | - Dongjin Wan
- College of Environmental Engineering, Henan University of Technology, Zhengzhou, 450001, Henan, China.
| | - Jia Zhou
- College of Biological Engineering, Henan University of Technology, Zhengzhou, 450001, Henan, China
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15
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Fallahi A, Rezvani F, Asgharnejad H, Khorshidi Nazloo E, Hajinajaf N, Higgins B. Interactions of microalgae-bacteria consortia for nutrient removal from wastewater: A review. CHEMOSPHERE 2021; 272:129878. [PMID: 35534965 DOI: 10.1016/j.chemosphere.2021.129878] [Citation(s) in RCA: 151] [Impact Index Per Article: 37.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 02/02/2021] [Accepted: 02/04/2021] [Indexed: 05/09/2023]
Abstract
Nitrogen and phosphorus pollution can cause eutrophication, resulting in ecosystem disruption. Wastewater treatment systems employing microalgae-bacteria consortia have the potential to enhance the nutrient removal efficiency from wastewater through mutual interaction and synergetic effects. The knowledge and control of the mechanisms involved in microalgae-bacteria interaction could improve the system's ability to transform and recover nutrients. In this review, a critical evaluation of recent literature was carried out to synthesize knowledge related to mechanisms of interaction between microalgae and bacteria consortia for nutrient removal from wastewater. It is now established that microalgae can produce oxygen through photosynthesis for bacteria and, in turn, bacteria supply the required metabolites and inorganic carbon source for algae growth. Here we highlight how the interaction between microalgae and bacteria is highly dependent on the nitrogen species in the wastewater. When the nitrogen source is ammonium, the generated oxygen by microalgae has a positive influence on nitrifying bacteria. When the nitrogen source is nitrate, the oxygen can have an inhibitory effect on denitrifying bacteria. However, some strains of microalgae have the capability to supply hydrogen gas for hydrogenotrophic denitrifiers as an energy source. Recent literature on biogranulation of microalgae and bacteria and its application for nutrient removal and biomass recovery is also discussed as a promising approach. Significant research challenges remain for the integration of microalgae-bacteria consortia into wastewater treatment processes including microbial community control and process stability over long time horizons.
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Affiliation(s)
- Alireza Fallahi
- School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran
| | - Fariba Rezvani
- School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran.
| | - Hashem Asgharnejad
- School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran
| | - Ehsan Khorshidi Nazloo
- School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran
| | - Nima Hajinajaf
- School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran; Chemical Engineering Program, School for Engineering of Matter, Transport, and Energy, Arizona State University, Tempe, AZ, USA
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16
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Li ZL, Zhu ZL, Lin XQ, Chen F, Li X, Liang B, Huang C, Zhang YM, Sun K, Zhou AN, Wang AJ. Microbial fuel cell-upflow biofilter coupling system for deep denitrification and power recovery: Efficiencies, bacterial succession and interactions. ENVIRONMENTAL RESEARCH 2021; 196:110331. [PMID: 33068576 DOI: 10.1016/j.envres.2020.110331] [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: 06/06/2020] [Revised: 08/26/2020] [Accepted: 10/09/2020] [Indexed: 06/11/2023]
Abstract
The excess organic carbon is often added to meet denitrification requirements during municipal wastewater treatment, resulting in the carbon waste and increased risk of secondary pollution. In this study, microbial fuel cell (MFC) was coupled with an up-flow denitrification biofilter (BF), and the long-term performances of denitrification and power output were investigated under the different carbon source concentration. With sodium acetate (NaAc) of 600 mg/L and 300 mg/L, the favorable denitrification efficiencies were obtained (98.60%) and the stable current output was maintained (0.44 mÃ0.48 mA). By supplying NaAc of 150 mg/L, the high denitrification efficiency remained in a high range (89.31%) and the current output maintained at 0.12 mA, while, the denitrification efficiency dropped to 71.34% without coupling MFC. Electron balance analysis indicated that both nitrate removal and electron recovery efficiencies were higher in MFC-BF than that in BF, verifying the improved denitrification and carbon utilization performance. Coupling MFC significantly altered the bacterial community structure and composition, and while, the diversified abundance and distribution of bacterial genera were observed at the different locations. Compared with BF, the more exoelectrogenic genera (Desulfobacterium, Trichococcus) and genera holding both denitrifying and electrogenic functions (Dechloromonas, Geobacter) were found dominated in MFC-BF. Instead, the dominating genera in BF were Dechloromonas, Desulfomicrobium, Acidovorax and etc. By coupling MFC, the more complex and diversified network and the closer interaction relationships between the dominant potential functional genera were found. The study provides a feasible approach to effectively improve the denitrification efficiency and organic carbon recovery for deep denitrification process.
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Affiliation(s)
- Zhi-Ling Li
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Zhong-Li Zhu
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Xiao-Qiu Lin
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Fan Chen
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Xu Li
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Bin Liang
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Cong Huang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Yuan-Ming Zhang
- Key Lab of Structures Dynamic Behavior and Control of China Ministry of Education, School of Civil Engineering, Harbin Institute of Technology, Harbin, 150090, China
| | - Kai Sun
- Key Lab of Structures Dynamic Behavior and Control of China Ministry of Education, School of Civil Engineering, Harbin Institute of Technology, Harbin, 150090, China.
| | - An-Nan Zhou
- Civil and Infrastructure Engineering, School of Engineering, RMIT University, Melbourne, Vic, 3001, Australia
| | - Ai-Jie Wang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China; Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
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17
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Wang JJ, Huang BC, Li J, Jin RC. Advances and challenges of sulfur-driven autotrophic denitrification (SDAD) for nitrogen removal. CHINESE CHEM LETT 2020. [DOI: 10.1016/j.cclet.2020.07.036] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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18
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Jia L, Liu H, Kong Q, Li M, Wu S, Wu H. Interactions of high-rate nitrate reduction and heavy metal mitigation in iron-carbon-based constructed wetlands for purifying contaminated groundwater. WATER RESEARCH 2020; 169:115285. [PMID: 31722275 DOI: 10.1016/j.watres.2019.115285] [Citation(s) in RCA: 95] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 11/01/2019] [Accepted: 11/04/2019] [Indexed: 06/10/2023]
Abstract
Groundwater, as the most important drinking water source in arid regions of China, has been polluted seriously by accumulated nitrate and heavy metals. An economic alternative with capacity of simultaneous mitigation of nitrate and heavy metals is urgently needed. This study explored the incorporation of iron scraps and biochar into constructed wetlands (CWs) for enhancing purification performance and investigated interactions of effective nitrate reduction and heavy metals mitigation. The results showed that nitrate reduction performance could reach 87% in iron and carbon-based (Fe-C) CWs through Fe-C micro-electrolysis process, with lower nitrous oxide (N2O) emission (4.6-11.75 μg m-2 h-1) due to the complete denitrification process. Moreover, efficient heavy metals mitigation of 75-97% total chromium (Cr) and total lead (Pb) was obtained from Fe-C systems. However, the occurrence of heavy metals (Cr and Pb) in the influent posed an adverse impact on nitrate removal with the reduction rate of 19-43%. Biochemical characteristics of wetland plants indicated that the plants also suffered from the stress which induced from heavy metals. Overall, although the addition of iron and biochar in CWs enhanced nitrate and heavy metals removal in low carbon groundwater, further investigation is still needed to reveal the complex relationships between the removal of nitrate and heavy metals in CWs.
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Affiliation(s)
- Lixia Jia
- College of Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, PR China
| | - Hai Liu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, PR China
| | - Qiang Kong
- College of Geography and Environment, Shandong Normal University, Jinan, 250014, PR China
| | - Ming Li
- College of Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, PR China
| | - Shubiao Wu
- Aarhus Institute of Advanced Studies, 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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19
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Su JF, Zhang H, Huang TL, Hu XF, Chen CL, Liu JR. The performance and mechanism of simultaneous removal of fluoride, calcium, and nitrate by calcium precipitating strain Acinetobacter sp. H12. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 187:109855. [PMID: 31689622 DOI: 10.1016/j.ecoenv.2019.109855] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 10/20/2019] [Accepted: 10/22/2019] [Indexed: 06/10/2023]
Abstract
A calcium precipitating and denitrifying bacterium H12 was used to investigate the F- removal performance and mechanism. The results showed that the strain H12 reduced 85.24% (0.036 mg·L-1·h-1) of F-, 62.43% (0.94 mg·L-1·h-1) of Ca2+, and approximately 100% of NO3- over 120 h in continuous determination experiments. The response surface methodology analysis demonstrated that the maximum removal efficiency of F- was 88.98% (0.062 mg·L-1·h-1) within 72 h under the following conditions: the initial Ca2+ concentration of 250.00 mg·L-1, pH of 7.50, and the initial C4H4Na2O4·6H2O concentration of 800.00 mg·L-1. The scanning electron microscopy images, the X-ray photoelectron spectroscopy, and X-ray diffraction results suggested the following removal mechanism of F-: (1) the bacteria, as the nucleation site, were encapsulated by bioprecipitation to form biological crystal seeds; (2) Biological crystal seeds adsorbed F- to form Ca5(PO4)3F and CaF2; (3) Under the induction of bacteria, calcium, fluoride and phosphate coprecipitated to form Ca5(PO4)3F and CaF2. In addition, the gas chromatography data indicated that F- had little or no effect on the gas composition during denitrification, and the fluorescence spectroscopy analysis also proved that the extracellular polymeric substance (protein) is the site of bioprecipitation nucleation.
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Affiliation(s)
- Jun Feng Su
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, People's Republic of China.
| | - Han Zhang
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, People's Republic of China
| | - Ting Lin Huang
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, People's Republic of China
| | - Xiao Fen Hu
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Chang Lun Chen
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Jia Ran Liu
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
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20
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NO and N2O accumulation during nitrite-based sulfide-oxidizing autotrophic denitrification. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.biteb.2019.100190] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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21
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Sun S, Gao L, He S, Huang J, Zhou W. Nitrogen removal in response to plants harvesting in two kinds of enhanced hydroponic root mats treating secondary effluent. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 670:200-209. [PMID: 30903893 DOI: 10.1016/j.scitotenv.2019.03.182] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 03/11/2019] [Accepted: 03/13/2019] [Indexed: 06/09/2023]
Abstract
Hydroponic root mats (HRMs) are a green technology for various wastewaters purification. However, plants wilting will inevitably reduce the purification efficiency of HRMs. Harvesting as an important way of plant management for a better understanding of sustainability of HRMs has always been highly controversial. The goal of this study was to investigate the impacts and sustainability of harvesting on nitrogen removal and greenhouse gases (CH4, N2O) emissions of the two kinds of enhanced hydroponic root mats: autotrophic hydroponic root mat (AHRM) and heterotrophic hydroponic root mat (HHRM) for treating secondary effluent. The results showed that harvesting temporarily decreased nitrogen removal efficiency of the two systems, and removal efficiency recovered quickly because of the existence of external electron donors. The effects of harvesting are ordered as: HHRM > AHRM, NO3--N > NH4+-N. Increasing C/N, S/N would reduce the impact of temperature on harvesting systems. Harvesting also increased the emission of greenhouse gases, and increasing C/N(=6), S/N(=1.1) could significantly reduce greenhouse gases emission of the harvesting systems at low temperature. In addition, composition analysis of the shoots of the harvested plants was also conducted, and the results showed that N contents of growing shoots were significantly higher than that of withered shoots. In order to make the hydroponic root mats sustainable, harvesting before the plants wilt is more effective in removing nitrogen from the system permanently and maintain a sustainable system.
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Affiliation(s)
- Shanshan Sun
- School of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, PR China
| | - Lei Gao
- CCCC Ecological Environmental Protection Investments CO., LTD, Beijing 100013, PR China
| | - Shengbing He
- School of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 20092, PR China.
| | - Jungchen Huang
- School of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, PR China
| | - Weili Zhou
- School of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, PR China
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22
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Li K, Guo J, Li H, Han Y, Chen Z, Song Y, Xing Y, Zhang C. A combined heterotrophic and sulfur-based autotrophic process to reduce high concentration perchlorate via anaerobic baffled reactors: Performance advantages of a step-feeding strategy. BIORESOURCE TECHNOLOGY 2019; 279:297-306. [PMID: 30738356 DOI: 10.1016/j.biortech.2019.01.111] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 01/22/2019] [Accepted: 01/23/2019] [Indexed: 06/09/2023]
Abstract
The combined anaerobic baffled reactors (ABRs) of heterotrophic and sulfur-based autotrophic processes were first investigated for the removal of high perchlorate concentration under different feeding strategies. The removal efficiency of the step-feeding ABR (SF-ABR) reached 97.56% at 800 mg/L perchlorate, which was significantly superior to the normal-feeding ABR (NF-ABR). In three components of the extracellular polymeric substances (EPS), the fluorescence intensity of the tryptophan-like component were identified by fluorescence excitation-emission matrix (EEM) spectra with parallel factor (PARAFAC) analysis, and exhibited a positive relationship with the perchlorate removal rate in the heterotrophic perchlorate reduction unit (HPR unit) of the SF-ABR (R2 = 0.9791) and NF-ABR (R2 = 0.9860). Bacterial community analysis suggested the dominating perchlorate reducing bacteria and the diversity in two ABRs. Principal component analysis indicated that the electron donor affected the microbial community structures. The study confirms that the SF-ABR is a powerful bioreactor for the combined heterotrophic and sulfur-based autotrophic process.
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Affiliation(s)
- Kun Li
- Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Jinjing Road 26#, Tianjin 300384, PR China
| | - Jianbo Guo
- Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Jinjing Road 26#, Tianjin 300384, PR China.
| | - Haibo Li
- Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Jinjing Road 26#, Tianjin 300384, PR China
| | - Yi Han
- Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Jinjing Road 26#, Tianjin 300384, PR China
| | - Zhi Chen
- Department of Building, Civil and Environmental Engineering, Concordia University, 1455 de Maisonneuve Blvd. W. Montreal, Quebec, Canada
| | - Yuanyuan Song
- Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Jinjing Road 26#, Tianjin 300384, PR China
| | - Yajuan Xing
- Key Laboratory of Recycling and Eco-treatment of Waste Biomass of Zhejiang Province, School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou 310023, PR China
| | - Chunqing Zhang
- Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Jinjing Road 26#, Tianjin 300384, PR China
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Rezvani F, Sarrafzadeh MH, Ebrahimi S, Oh HM. Nitrate removal from drinking water with a focus on biological methods: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:1124-1141. [PMID: 28567682 DOI: 10.1007/s11356-017-9185-0] [Citation(s) in RCA: 117] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Accepted: 05/02/2017] [Indexed: 06/07/2023]
Abstract
This article summarizes several developed and industrial technologies for nitrate removal from drinking water, including physicochemical and biological techniques, with a focus on autotrophic nitrate removal. Approaches are primarily classified into separation-based and elimination-based methods according to the fate of the nitrate in water treatment. Biological denitrification as a cost-effective and promising method of biological nitrate elimination is reviewed in terms of its removal process, applicability, efficiency, and associated disadvantages. The various pathways during biological nitrate removal, including assimilatory and dissimilatory nitrate reduction, are also explained. A comparative study was carried out to provide a better understanding of the advantages and disadvantages of autotrophic and heterotrophic denitrification. Sulfur-based and hydrogen-based denitrifications, which are the most common autotrophic processes of nitrate removal, are reviewed with the aim of presenting the salient features of hydrogenotrophic denitrification along with some drawbacks of the technology and research areas in which it could be used but currently is not. The application of algae-based water treatment is also introduced as a nature-inspired approach that may broaden future horizons of nitrate removal technology.
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Affiliation(s)
- Fariba Rezvani
- UNESCO Chair on Water Reuse, Biotechnology Group, School of Chemical Engineering, College of Engineering, University of Tehran, P.O. Box: 11155-4563, Tehran, Iran
| | - Mohammad-Hossein Sarrafzadeh
- UNESCO Chair on Water Reuse, Biotechnology Group, School of Chemical Engineering, College of Engineering, University of Tehran, P.O. Box: 11155-4563, Tehran, Iran.
| | - Sirous Ebrahimi
- Biotechnology Research Centre, Faculty of Chemical Engineering, Sahand University of Technology, Tabriz, Iran
| | - Hee-Mock Oh
- Cell Factory Research Centre, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, 34141, Republic of Korea.
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Wang Y, Li P, Zuo J, Gong Y, Wang S, Shi X, Zhang M. Inhibition by free nitrous acid (FNA) and the electron competition of nitrite in nitrous oxide (N 2O) reduction during hydrogenotrophic denitrification. CHEMOSPHERE 2018; 213:1-10. [PMID: 30205270 DOI: 10.1016/j.chemosphere.2018.08.135] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Revised: 08/23/2018] [Accepted: 08/26/2018] [Indexed: 06/08/2023]
Abstract
Hydrogenotrophic denitrification is a promising technology for nitrate removal from organic-deficient wastewater or groundwater, and the attention of nitrous oxide (N2O) emission during this process is required. Both nitrite and free nitrous acid (FNA or HNO2) were reported to exert significant effects on N2O reduction in heterotrophic denitrification, whereas, little knowledge has been obtained in hydrogenotrophic denitrification. In this study, we conducted a series of batch tests to comprehensively investigate the effects of nitrite, pH and FNA on N2O production and reduction in a hydrogenotrophic denitrification process. The results showed that N2O reduction rate decreased under both conditions of low pH and presence of nitrite, which would exert synergetic inhibition on N2O reduction. The potential mechanisms that give rise to the results included electron competition and FNA inhibition. Electron competition between nitrite and N2O reductases occurred when both nitrite and N2O were added, which might contribute to the decrease in the N2O reduction rate. The electron supply, which was obtained from the uptake of molecular hydrogen, declined with increasing FNA concentration according to a logarithmic model (R2 = 0.9240). Additionally, the electron consumption rate of N2O reductase to nitrite reductase ratio was initially stable and then decreased with increasing FNA concentration. The inhibition of N2O reduction by FNA was determined to be reversible. The study suggested that both of the electron supply and N2O reduction in hydrogenotrophic denitrification could be inhibited by FNA.
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Affiliation(s)
- Yajiao Wang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Peng Li
- School of Environmental Science & Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China; State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Jiane Zuo
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China.
| | - Yutao Gong
- Duke University, PO Box 94279, Durham, NC, 27708, USA
| | - Sike Wang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Xuchuan Shi
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Mengyu Zhang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
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Wang Z, He S, Huang J, Zhou W, Chen W. Comparison of heterotrophic and autotrophic denitrification processes for nitrate removal from phosphorus-limited surface water. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 238:562-572. [PMID: 29605616 DOI: 10.1016/j.envpol.2018.03.080] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Revised: 03/10/2018] [Accepted: 03/22/2018] [Indexed: 06/08/2023]
Abstract
Phosphorus (P) limitation has been demonstrated for micro-polluted surface water denitrification treatment in previous study. In this paper, a lab-scale comparative study of autotrophic denitrification (ADN) and heterotrophic denitrification (HDN) in phosphorus-limited surface water was investigated, aiming to find out the optimal nitrogen/phosphorus (N/P) ratio and the mechanism of the effect of P limitation on ADN and HDN. Furthermore, the optimal denitrification process was applied to the West Lake denitrification project, aiming to improve the water quality of the West Lake from worse than grade V to grade IV (GB3838-2006). The lab-scale study showed that the lack of P indeed inhibited HDN more greatly than ADN. The optimal N/P ratio for ADN and HDN was 25 and a 0.15 mg PO43--P L-1 of microbial available phosphorus (MAP) was observed. P additions could greatly enhance the resistance of ADN and HDN to hydraulic loading shock. Besides, The P addition could effectively stimulate the HDN performance via enriching the heterotrophic denitrifiers and the denitrifying phosphate-accumulating organisms (DNPAOs). Additionally, HDN was more effective and cost-effective than ADN for treating P-limited surface water. The study of the full-scale HDBF (heterotrophic denitrification biofilter) indicated that the denitrification performance was periodically impacted by P limitation, particularly at low water temperatures.
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Affiliation(s)
- Zheng Wang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Shengbing He
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, PR China.
| | - Jungchen Huang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Weili Zhou
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Wanning Chen
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, 200240, PR China
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26
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Yang Y, Gerrity S, Collins G, Chen T, Li R, Xie S, Zhan X. Enrichment and characterization of autotrophic Thiobacillus denitrifiers from anaerobic sludge for nitrate removal. Process Biochem 2018. [DOI: 10.1016/j.procbio.2018.02.017] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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