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Chen L, Xiang H, Zhou LT, Zhang YQ, Ding YC, Wu D, Zhu NW, Zhang YF, Feng HJ. Low-voltage stimulated denitrification performance of high-salinity wastewater using halotolerant microorganisms. BIORESOURCE TECHNOLOGY 2024; 401:130688. [PMID: 38604298 DOI: 10.1016/j.biortech.2024.130688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 04/07/2024] [Accepted: 04/08/2024] [Indexed: 04/13/2024]
Abstract
Nitrate is a common contaminant in high-salinity wastewater, which has adverse effects on both the environment and human health. However, conventional biological treatment exhibits poor denitrification performance due to the high-salinity shock. In this study, an innovative approach using an electrostimulating microbial reactor (EMR) was explored to address this challenge. With a low-voltage input of 1.2 V, the EMR reached nitrate removal kinetic parameter (kNO3-N) of 0.0166-0.0808 h-1 under high-salinities (1.5 %-6.5 %), which was higher than that of the microbial reactor (MR) (0.0125-0.0478 h-1). The mechanisms analysis revealed that low-voltage significantly enhanced microbial salt-in strategy and promoted the secretion of extracellular polymeric substances. Halotolerant denitrification microorganisms (Pseudomonas and Nitratireductor) were also enriched in EMR. Moreover, the EMR achieved a NO3-N removal efficiency of 73.64 % in treating high-salinity wastewater (salinity 4.69 %) over 18-cycles, whereas the MR only reached 54.67 %. In summary, this study offers an innovative solution for denitrification of high-salinity wastewater.
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Affiliation(s)
- Long Chen
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, Zhejiang, China; International Science and Technology Cooperation Platform for Low-Carbon Recycling of Waste and Green Development, Zhejiang Gongshang University, Hangzhou 310012, Zhejiang, China
| | - Hai Xiang
- College of Environment and Resources, Zhejiang A&F University, Hangzhou 311300, Zhejiang, China
| | - Li-Ting Zhou
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, Zhejiang, China; International Science and Technology Cooperation Platform for Low-Carbon Recycling of Waste and Green Development, Zhejiang Gongshang University, Hangzhou 310012, Zhejiang, China
| | - Yan-Qing Zhang
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, Zhejiang, China; International Science and Technology Cooperation Platform for Low-Carbon Recycling of Waste and Green Development, Zhejiang Gongshang University, Hangzhou 310012, Zhejiang, China
| | - Yang-Cheng Ding
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, Zhejiang, China; College of Environment and Resources, Zhejiang A&F University, Hangzhou 311300, Zhejiang, China; International Science and Technology Cooperation Platform for Low-Carbon Recycling of Waste and Green Development, Zhejiang Gongshang University, Hangzhou 310012, Zhejiang, China
| | - Di Wu
- Center for Environmental and Energy Research (CEER) - Engineering of Materials via Catalysis and Characterization, Ghent University Global Campus, 119-5 Songdomunhwa-Ro, Yeonsu-Gu, Incheon 406-840, South Korea
| | - Nan-Wen Zhu
- Shanghai Engineering Research Center of Solid Waste Treatment and Resource Recovery, School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yi-Feng Zhang
- Department of Environmental and Resource Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Hua-Jun Feng
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, Zhejiang, China; College of Environment and Resources, Zhejiang A&F University, Hangzhou 311300, Zhejiang, China; International Science and Technology Cooperation Platform for Low-Carbon Recycling of Waste and Green Development, Zhejiang Gongshang University, Hangzhou 310012, Zhejiang, China.
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Naderi A, Kakavandi B, Giannakis S, Angelidaki I, Rezaei Kalantary R. Putting the electro-bugs to work: A systematic review of 22 years of advances in bio-electrochemical systems and the parameters governing their performance. ENVIRONMENTAL RESEARCH 2023; 229:115843. [PMID: 37068722 DOI: 10.1016/j.envres.2023.115843] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Revised: 03/25/2023] [Accepted: 04/03/2023] [Indexed: 05/08/2023]
Abstract
Wastewater treatment using bioelectrochemical systems (BESs) can be considered as a technology finding application in versatile areas such as for renewable energy production and simultaneous reducing environmental problems, biosensors, and bioelectrosynthesis. This review paper reports and critically discusses the challenges, and advances in bio-electrochemical studies in the 21st century. To sum and critically analyze the strides of the last 20+ years on the topic, this study first provides a comprehensive analysis on the structure, performance, and application of BESs, which include Microbial Fuel Cells (MFCs), Microbial Electrolysis Cells (MECs) and Microbial Desalination Cells (MDCs). We focus on the effect of various parameters, such as electroactive microbial community structure, electrode material, configuration of bioreactors, anode unit volume, membrane type, initial COD, co-substrates and the nature of the input wastewater in treatment process and the amount of energy and fuel production, with the purpose of showcasing the modes of operation as a guide for future studies. The results of this review show that the BES have great potential in reducing environmental pollution, purifying saltwater, and producing energy and fuel. At a larger scale, it aspires to facilitate the path of achieving sustainable development and practical application of BES in real-world scenarios.
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Affiliation(s)
- Azra Naderi
- Research Center for Environmental Health Technology, Iran University of Medical Sciences, Tehran, Iran; Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Babak Kakavandi
- Research Center for Health, Safety and Environment, Alborz University of Medical Sciences, Karaj, Iran; Department of Environmental Health Engineering, Alborz University of Medical Sciences, Karaj, Iran
| | - Stefanos Giannakis
- Universidad Politécnica de Madrid, E.T.S. de Ingenieros de Caminos, Canales y Puertos, Departamento de Ingeniería Civil: Hidráulica, Energía y Medio Ambiente, Environment, Coast and Ocean Research Laboratory (ECOREL-UPM), C/Profesor Aranguren, s/n, ES-28040, Madrid, Spain
| | - Irini Angelidaki
- Department of Chemical and Biochemical Engineering, Technical University of Denmark, DK-2800, Lyngby, Denmark
| | - Roshanak Rezaei Kalantary
- Research Center for Environmental Health Technology, Iran University of Medical Sciences, Tehran, Iran; Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran.
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Sonawane JM, Mahadevan R, Pandey A, Greener J. Recent progress in microbial fuel cells using substrates from diverse sources. Heliyon 2022; 8:e12353. [PMID: 36582703 PMCID: PMC9792797 DOI: 10.1016/j.heliyon.2022.e12353] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 11/09/2022] [Accepted: 12/07/2022] [Indexed: 12/23/2022] Open
Abstract
Increasing untreated environmental outputs from industry and the rising human population have increased the burden of wastewater and other waste streams on the environment. The most prevalent wastewater treatment methods include the activated sludge process, which requires aeration and is, therefore, energy and cost-intensive. The current trend towards a circular economy facilitates the recovery of waste materials as a resource. Along with the amount, the complexity of wastewater is increasing day by day. Therefore, wastewater treatment processes must be transformed into cost-effective and sustainable methods. Microbial fuel cells (MFCs) use electroactive microbes to extract chemical energy from waste organic molecules to generate electricity via waste treatment. This review focuses use of MFCs as an energy converter using wastewater from various sources. The different substrate sources that are evaluated include industrial, agricultural, domestic, and pharmaceutical types. The article also highlights the effect of operational parameters such as organic load, pH, current, and concentration on the MFC output. The article also covers MFC functioning with respect to the substrate, and the associated performance parameters, such as power generation and wastewater treatment matrices, are given. The review also illustrates the success stories of various MFC configurations. We emphasize the significant measures required to fill in the gaps related to the effect of substrate type on different MFC configurations, identification of microbes for use as biocatalysts, and development of biocathodes for the further improvement of the system. Finally, we shortlisted the best performing substrates based on the maximum current and power, Coulombic efficiency, and chemical oxygen demand removal upon the treatment of substrates in MFCs. This information will guide industries that wish to use MFC technology to treat generated effluent from various processes.
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Affiliation(s)
- Jayesh M. Sonawane
- Department of Chemical Engineering and Applied Chemistry, University of Toronto M5S 3E5, Canada
- Département de Chimie, Faculté des Sciences et de génie, Université Laval, Québec City, QC, Canada
- Corresponding author.
| | - Radhakrishnan Mahadevan
- Department of Chemical Engineering and Applied Chemistry, University of Toronto M5S 3E5, Canada
| | - Ashok Pandey
- Centre for Innovation and Translational Research, CSIR-Indian Institute of Toxicology Research, Lucknow, 226 001, India
- Centre for Energy and Environmental Sustainability, Lucknow, 226 029, India
| | - Jesse Greener
- Département de Chimie, Faculté des Sciences et de génie, Université Laval, Québec City, QC, Canada
- CHU de Québec, Centre de recherche, Université Laval, 10 rue de l'Espinay, Québec, QC, Canada
- Corresponding author.
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4
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Hypersaline Wastewater Produced from Pickled Mustard Tuber (Chinese Zhacai): Current Treatment Status and Prospects. WATER 2022. [DOI: 10.3390/w14091508] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Pickled mustard tuber, a worldwide condiment, is increasing at a fast growth rate. Its production generates a considerable amount of hypersaline wastewater containing NaCl of 7 wt.%, COD of 30,000 mg L−1, NH3-N of 400 mg L−1, and TP of 300 mg L−1. Pickled mustard tuber wastewater (PMTW) has severe effects on crops, deterioration of water quality, soil infertility and ecological systems. Due to the technic difficulties and insufficient support from the local governments; however, PMTW has not yet been widely investigated and well summarized. Therefore, this manuscript reviewed the relatively latest advances in PMTW. Physicochemical and biological hybrid processes mainly treat PMTW and the corresponding cost is 6.00 US dollars per ton. In the context of double carbon capture capacity in China and the development of the pickled mustard industry, PMTW sauce and sustainable reuse such as nutrient recovery, acid and alkaline regeneration and renewable energy may be bright prospects.
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Su D, Chen Y. Advanced bioelectrochemical system for nitrogen removal in wastewater. CHEMOSPHERE 2022; 292:133206. [PMID: 34922956 DOI: 10.1016/j.chemosphere.2021.133206] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 12/03/2021] [Accepted: 12/05/2021] [Indexed: 06/14/2023]
Abstract
Nitrogen (N) pollution in water has become a serious issue that cannot be ignored due to the harm posed by excessive nitrogen to environmental safety and human health; as such, N concentrations in water are strictly limited. The bioelectrochemical system (BES) is a new method to remove excessive N from water, and has attracted considerable attention. Compared with other methods, it is highly efficient and has low energy consumption. However, the BES has not been applied for N removal in practice due to lack of in-depth research on the mechanism and construction of high-performance electrodes, separators, and reactor configurations; this highlights a need to review and examine the efforts in this field. This paper provides a comprehensive review on the current BES research for N removal focusing on the reaction principles, reactor configurations, electrodes and separators, and treatment of actual wastewater; the corresponding performances in these realms are also discussed. Finally, the prospects for N removal in water using the BES are presented.
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Affiliation(s)
- Dexin Su
- School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing, 100044, PR China
| | - Yupeng Chen
- School of Chemistry, Beihang University, Beijing, 100191, PR China.
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6
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Wan L, Wu Y, Zhang X, Zhang W. Nutrient removal from pickle industry wastewater by cultivation of Chlorella pyrenoidosa for lipid production. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2019; 79:2166-2174. [PMID: 31318354 DOI: 10.2166/wst.2019.217] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
The present research examined the feasibility of cultivating Chlorella pyrenoidosa in pickle industry wastewater for simultaneous nutrient removal and lipid production. The characteristics of microalgae growth, nutrient removal, lipid accumulation and composition of C. pyrenoidosa cultivated in pickle wastewater with different dilution ratios were investigated. The results showed the maximum algae biomass concentration of 1.57 ± 0.12 g L-1 was achieved in non-diluted pickle wastewater with the highest biomass productivity of 170.65 mg L-1 day-1. Maximum nutrient removal efficiency was observed in 20.0% pickle wastewater with removal rates of chemical oxygen demand (COD), total phosphorus (TP), total nitrogen (TN) and NH4-N at 84.67%, 92.46%, 85.82% and 93.42%, respectively. The lipid content of C. pyrenoidosa growing in pickle wastewater ranged from 29.73% to 31.78%, with a highest lipid productivity of 57.23 mg L-1 day-1. The relative content of triolefinic acids (C16:3 and C18:3) decreased while the monoenoic acids (C16:1 and C18:1) increased synchronously with the pickle wastewater concentration. Unsaturated fatty acid methyl esters were the main components, ranging from 73.04% to 77.6%. The biodiesel properties satisfied the major specifications in US and European biodiesel standards. The results indicated that C. pyrenoidosa is a promising species for nutrient removal together with lipid production in pickle industry wastewater.
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Affiliation(s)
- Liang Wan
- College of Resource and Environmental Science, Wuhan University, Wuhan 430072, China E-mail:
| | - Yixiao Wu
- College of Resource and Environmental Science, Wuhan University, Wuhan 430072, China E-mail:
| | - Xuemei Zhang
- College of Resource and Environmental Science, Wuhan University, Wuhan 430072, China E-mail:
| | - Weihao Zhang
- College of Resource and Environmental Science, Wuhan University, Wuhan 430072, China E-mail: ; Hubei Provincial Collaborative Innovation Center for Water Resources Security, Wuhan University, Wuhan 430072, China
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Zhang L, Fu G, Zhang Z. Electricity generation and microbial community in long-running microbial fuel cell for high-salinity mustard tuber wastewater treatment. Bioelectrochemistry 2019; 126:20-28. [DOI: 10.1016/j.bioelechem.2018.11.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Revised: 11/05/2018] [Accepted: 11/05/2018] [Indexed: 12/19/2022]
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8
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Zhang L, Fu G, Zhang Z. Simultaneous nutrient and carbon removal and electricity generation in self-buffered biocathode microbial fuel cell for high-salinity mustard tuber wastewater treatment. BIORESOURCE TECHNOLOGY 2019; 272:105-113. [PMID: 30316192 DOI: 10.1016/j.biortech.2018.10.012] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 10/01/2018] [Accepted: 10/04/2018] [Indexed: 06/08/2023]
Abstract
Mustard tuber wastewater (MTWW) was used as both anolyte and catholyte in biocathode microbial fuel cell (BMFC). The results showed simultaneous nutrient and carbon removal and electricity generation were realized in BMFC. Excellent Chemical Oxygen Demand (COD) removal occurred in both anode (>90%) and cathode (>91%). Concerning nutrient removal, it was mainly removed in cathode. The maximum total phosphorus (TP) removal could reach 80.8 ± 1.0% by biological action. Simultaneous nitrification and denitrification (SND) was realized in cathode. The bacteria involved in nitrification were Nitrosomonas and SM1A02. Oceanimonas and Saprospiraceae_uncultured (anaerobic denitrifier), Thauera, Stenotrophomonas, Flavobacterium and Marinobacter (aerobic denitrifier), and Thioalkalispira (autotrophic denitrifier) were responsible for denitrification. Considering slight variation of anode and cathode pH, it could be concluded that MTWW was adequately self-buffered when used as electrolyte. Furthermore, electricity generation decreased with cathodic dissolved oxygen (DO) declining. These findings provide a novel method for MTWW resourceful treatment.
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Affiliation(s)
- Linfang Zhang
- Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400044, China; Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400044, China
| | - Guokai Fu
- Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400044, China; Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400044, China.
| | - Zhi Zhang
- Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400044, China; Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400044, China
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9
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Li J, Qi P, Qiang Z, Dong H, Gao D, Wang D. Is anammox a promising treatment process for nitrogen removal from nitrogen-rich saline wastewater? BIORESOURCE TECHNOLOGY 2018; 270:722-731. [PMID: 30193879 DOI: 10.1016/j.biortech.2018.08.115] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 08/27/2018] [Accepted: 08/28/2018] [Indexed: 05/12/2023]
Abstract
Rapidly growing discharge of nitrogen-rich saline wastewater has significantly affect environment. However, due to the inhibition resulting from high salinity on microbes, it is still a challenge to treat nitrogen-rich saline wastewater efficiently. Anammox process, as a cost-effective and environment-friendly nitrogen removal approach, has shown a potential in treating nitrogen-rich saline wastewater. This review is conducted from a critical perspective and provides a comprehensive overview on the performance of anammox process treating nitrogen-rich saline wastewater. Two strategies including freshwater-derived anammox bacteria acclimatization and marine anammox bacteria enrichment are evaluated. Second, effects resulting from salinity on the performance of anammox reactor, the microbial communities and sludge characteristics are discussed. Third, salinity-tolerant mechanism of anammox bacteria is analyzed. This review also reveals some critical knowledge gaps and future research needs, which benefits application of anammox process to treat nitrogen-rich saline wastewater.
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Affiliation(s)
- Jin Li
- School of Environmental Science and Engineering, Qingdao University, Qingdao 266071, China.
| | - Panqing Qi
- School of Environmental Science and Engineering, Qingdao University, Qingdao 266071, China
| | - Zhimin Qiang
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-environmental Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Huiyu Dong
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-environmental Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Dawen Gao
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Dan Wang
- National Marine Environmental Forecasting Center, State Oceanic Administration, Beijing 100081, China
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Rajasimman M, Babu SV, Rajamohan N. Biodegradation of textile dyeing industry wastewater using modified anaerobic sequential batch reactor – Start-up, parameter optimization and performance analysis. J Taiwan Inst Chem Eng 2017. [DOI: 10.1016/j.jtice.2017.01.027] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Chen J, Han Y, Wang Y, Gong B, Zhou J, Qing X. Start-up and microbial communities of a simultaneous nitrogen removal system for high salinity and high nitrogen organic wastewater via heterotrophic nitrification. BIORESOURCE TECHNOLOGY 2016; 216:196-202. [PMID: 27240235 DOI: 10.1016/j.biortech.2016.05.064] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 05/18/2016] [Accepted: 05/19/2016] [Indexed: 06/05/2023]
Abstract
In this study, a simultaneous nitrogen removal system for high salinity and high nitrogen organic wastewater was developed in a pressurized biofilm reactor. The result showed that under the air supply rate of 200Lh(-1), salinity of 3.0±0.2%, organic load of 10kgCODm(-3)d(-1) and nitrogen loading of 0.185kgm(-3)d(-1), the reactor started up rapidly and performed stably after 30days operation. Meanwhile, a simultaneous COD and nitrogen removal was achieved in the single-stage reactor, with COD, NH4(+)-N and TN removal efficiency of 97%, 99% and 98%, respectively. Denaturing gradient gel electrophoresis profile demonstrated that simultaneous nitrogen removal could be achieved through heterotrophic nitrification-aerobic denitrification, and the pivotal microorganisms were Flavobacterium phragmitis and Paracoccus denitrificans. The microbial community of salt-tolerant halophilic microorganisms was developed successfully. This study can provide a more efficient and feasible solution to treat high salinity organic wastewater.
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Affiliation(s)
- Jiahao Chen
- Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, PR China; Key Laboratory of the Three Gorges Reservoir's Eco-Environments, Ministry of Education, Chongqing University, Chongqing 400045, PR China
| | - Yi Han
- Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, PR China; School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, PR China
| | - Yingmu Wang
- Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, PR China; Key Laboratory of the Three Gorges Reservoir's Eco-Environments, Ministry of Education, Chongqing University, Chongqing 400045, PR China
| | - Benzhou Gong
- Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, PR China; Key Laboratory of the Three Gorges Reservoir's Eco-Environments, Ministry of Education, Chongqing University, Chongqing 400045, PR China
| | - Jian Zhou
- Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, PR China; Key Laboratory of the Three Gorges Reservoir's Eco-Environments, Ministry of Education, Chongqing University, Chongqing 400045, PR China.
| | - Xiaoxia Qing
- Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, PR China; Key Laboratory of the Three Gorges Reservoir's Eco-Environments, Ministry of Education, Chongqing University, Chongqing 400045, PR China
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Chai HX, Chen W, He Q, Zhou J. Effects of volumetric load in an anaerobic sequencing batch biofilm treating industrial saline wastewater. ENVIRONMENTAL TECHNOLOGY 2015; 36:648-653. [PMID: 25220359 DOI: 10.1080/09593330.2014.957220] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Mustard tuber wastewater is of high salinity ([Cl(-1)]=18∼23 g L(-1)), high organic content (chemical oxygen demand, COD=4000±100 L(-1)) and biodegradability (BOD5/COD≈0.5). The anaerobic sequencing batch biofilm reactor (ASBBR) pre-treatment, an important step to meet national discharge standard, was applied to reduce much of the organics in mustard tuber wastewater. The experiment for the effect of the volumetric load on ASBBR treating mustard tuber wastewater was conducted at different hydraulic retention times (HRTs) and volumetric exchange ratios (λ). The ASBBR operating at 50% biomass density, 30 °C, influent COD concentration of 4000±100 mg L(-1) and pH value of 7.0±0.2, the effluent COD concentration increased from 0.22 to 4 kgCOD m(-3) d(-1) when the volumetric load increased from 100 to 1520 mg L(-1). The effluent COD concentration differed when adopted different HRT and λ under the same volumetric load. And given certain influent levels, a higher performance of ASBBR could be achieved at a lower value of HRT and λ. The optimal operational load could be determined by limiting the COD concentration under different discharge conditions, based on the results obtained in experiments.
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Affiliation(s)
- Hong-Xiang Chai
- a Key Laboratory of the Three-Gorge Reservoir's Eco-Environments, Ministry of Education , Chongqing University , Chongqing 400045 , People's Republic of China
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Start-Up of a Combined Anaerobic/Partial Nitritation/ANAMMOX Process for High-Salt Mustard Wastewater Treatment. Appl Biochem Biotechnol 2014; 175:119-34. [DOI: 10.1007/s12010-014-1247-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Accepted: 09/10/2014] [Indexed: 11/26/2022]
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14
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Guo F, Fu G, Zhang Z, Zhang C. Mustard tuber wastewater treatment and simultaneous electricity generation using microbial fuel cells. BIORESOURCE TECHNOLOGY 2013; 136:425-430. [PMID: 23567712 DOI: 10.1016/j.biortech.2013.02.116] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2013] [Revised: 02/25/2013] [Accepted: 02/27/2013] [Indexed: 06/02/2023]
Abstract
Mustard tuber wastewater (MTWW) was utilized as fuel in the typical dual-chamber microbial fuel cells (MFCs) to recover bio-energy and to obtain effluent treatment simultaneously. The whole experiment was divided into four phases characterized by increasing contents of primary clarifier effluent (PCE). Results showed substrate1, with which MFC generated a maximum power density of 246 mW/m(2), was the most appropriate fuel in terms of power recovery and the internal resistance and columbic efficiency were 121 Ω and 67.7±1%, respectively. When feeding MFCs with substrate4, 85±0% of COD could be removed, which was the highest COD removal, however, the power retrieve efficiency was much lower. Interestingly, significantly negative correlation (P<0.01, F-test) between contents of PCE and maximum cell voltages and positive correlation between the contents and internal resistances were found. It was the complexity and colloidal particulates present in PCE that gradually increased internal resistance and accordingly decreased power-generating performance.
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Affiliation(s)
- Fei Guo
- Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400044, China
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