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Sun Y, Qaisar M, Wang K, Lou J, Li Q, Cai J. Production and characteristics of elemental sulfur during simultaneous nitrate and sulfide removal. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:36226-36233. [PMID: 33687628 DOI: 10.1007/s11356-021-13269-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 03/01/2021] [Indexed: 06/12/2023]
Abstract
The production and characteristics of elemental sulfur were examined during simultaneous sulfide and nitrate removal, with abiotic assays as control. The biotic assay showed good sulfide and nitrate removal, with the respective removal percentage of which were 90.67-96.88% and 100%. Nitrate reduction resulted in the production of nitrogen gas, while sulfate formed due to sulfide oxidation. The concentration of elemental sulfur in the effluent was greater than that in the sludge, which accounted for 73.70-86.28% of total elemental sulfur produced. Furthermore, the elemental sulfur of the effluent and sludge from the biotic assays was orthorhombic crystal S8. Elemental sulfur was normally distributed in the effluent, but its average diameter increased with the increasing influent sulfide concentration (60-300 mg S/L), where the average diameter increased from 10 (60 mg S/L) to 29 μm (300 mg S/L).
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Affiliation(s)
- Yue Sun
- College of Environmental Science and Engineering, Zhejiang Gongshang University, No.18 Xuezheng Street, Hangzhou, Zhejiang Province, China
| | - Mahmood Qaisar
- Department of Environmental Sciences, COMSATS University Islamabad, Abbottabad Campus, Abbottabad, Pakistan
| | - Kaiquan Wang
- College of Environmental Science and Engineering, Zhejiang Gongshang University, No.18 Xuezheng Street, Hangzhou, Zhejiang Province, China
| | - Juqing Lou
- College of Environmental Science and Engineering, Zhejiang Gongshang University, No.18 Xuezheng Street, Hangzhou, Zhejiang Province, China
| | - Qiangbiao Li
- College of Environmental Science and Engineering, Zhejiang Gongshang University, No.18 Xuezheng Street, Hangzhou, Zhejiang Province, China
| | - Jing Cai
- College of Environmental Science and Engineering, Zhejiang Gongshang University, No.18 Xuezheng Street, Hangzhou, Zhejiang Province, China.
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Costa RB, Lens PNL, Foresti E. Methanotrophic denitrification in wastewater treatment: microbial aspects and engineering strategies. Crit Rev Biotechnol 2021; 42:145-161. [PMID: 34157918 DOI: 10.1080/07388551.2021.1931014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Anaerobic technologies are consolidated for sewage treatment and are the core processes for mining marketable products from waste streams. However, anaerobic effluents are supersaturated with methane, which represents a liability regarding greenhouse gas emissions. Meanwhile, anaerobic technologies are not capable of nitrogen removal, which is required to ensure environmental protection. Methane oxidation and denitrification processes can be combined to address both issues concurrently. Aerobic methane oxidizers can release intermediate organic compounds that can be used by conventional denitrifiers as electron donors. Alternatively, anoxic methanotrophic species combine methane oxidation with either nitrate or nitrite reduction in the same metabolism. Engineered systems need to overcome the long doubling times and low NOx consumption rates of anoxic methanotrophic microorganisms. Another commonly reported bottleneck of methanotrophic denitrification relates to gas-liquid mass transfer limitations. Although anaerobic effluents are supersaturated with methane, experimental setups usually rely on methane supply in a gaseous mode. Hence, possibilities for the application of methane-oxidation coupled to denitrification in full scale might be overlooked. Moreover, syntrophic relationships among methane oxidizers, denitrifiers, nitrifiers, and other microorganisms (such as anammox) are not well understood. Integrating mixed populations with various metabolic abilities could allow for more robust methane-driven wastewater denitrification systems. This review presents an overview of the metabolic capabilities of methane oxidation and denitrification and discusses technological aspects that allow for the application of methanotrophic denitrification at larger scales.
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Affiliation(s)
- R B Costa
- Department of Hydraulics and Sanitation, São Carlos School of Engineering (EESC), University of São Paulo (USP), São Carlos, Brazil.,National University of Ireland, Galway, Ireland
| | - P N L Lens
- National University of Ireland, Galway, Ireland
| | - E Foresti
- Department of Hydraulics and Sanitation, São Carlos School of Engineering (EESC), University of São Paulo (USP), São Carlos, Brazil
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Comparison between two different fixed-bed reactor configurations for nitrogen removal coupled to biogas biodesulfurization. Biochem Eng J 2020. [DOI: 10.1016/j.bej.2020.107716] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Yuan Y, Cheng H, Chen F, Zhang Y, Xu X, Huang C, Chen C, Liu W, Ding C, Li Z, Chen T, Wang A. Enhanced methane production by alleviating sulfide inhibition with a microbial electrolysis coupled anaerobic digestion reactor. ENVIRONMENT INTERNATIONAL 2020; 136:105503. [PMID: 32006760 DOI: 10.1016/j.envint.2020.105503] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 01/15/2020] [Accepted: 01/16/2020] [Indexed: 06/10/2023]
Abstract
Anaerobic digestion (AD) of organics is a challenging task under high-strength sulfate (SO42-) conditions. The generation of toxic sulfides by SO42--reducing bacteria (SRB) causes low methane (CH4) production. This study investigated the feasibility of alleviating sulfide inhibition and enhancing CH4 production by using an anaerobic reactor with built-in microbial electrolysis cell (MEC), namely ME-AD reactor. Compared to AD reactor, unionized H2S in the ME-AD reactor was sufficiently converted into ionized HS- due to the weak alkaline condition created via cathodic H2 production, which relieved the toxicity of unionized H2S to methanogenesis. Correspondingly, the CH4 production in the ME-AD system was 1.56 times higher than that in the AD reactor with alkaline-pH control and 3.03 times higher than that in the AD reactors (no external voltage and no electrodes) without alkaline-pH control. MEC increased the amount of substrates available for CH4-producing bacteria (MPB) to generate more CH4. Microbial community analysis indicated that hydrogentrophic MPB (e.g. Methanosphaera) and acetotrophic MPB (e.g. Methanosaeta) participated in the two major pathways of CH4 formation were successfully enriched in the cathode biofilm and suspended sludge of the ME-AD system. Economic revenue from increased CH4 production totally covered the cost of input electricity. Integration of MEC with AD could be an attractive technology to alleviate sulfide inhibition and enhance CH4 production from AD of organics under SO42--rich condition.
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Affiliation(s)
- Ye Yuan
- School of Environmental Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, China; Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Haoyi Cheng
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Fan Chen
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Yiqian Zhang
- School of Environmental Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, China
| | - Xijun Xu
- State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Cong Huang
- State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Chuan Chen
- State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Wenzong Liu
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Cheng Ding
- School of Environmental Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, China
| | - Zhaoxia Li
- School of Environmental Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, China
| | - Tianming Chen
- School of Environmental Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, China.
| | - Aijie Wang
- School of Environmental Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, China; Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
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de Godoi LAG, Camiloti PR, Bernardes AN, Sanchez BLS, Torres APR, da Conceição Gomes A, Botta LS. Seasonal variation of the organic and inorganic composition of sugarcane vinasse: main implications for its environmental uses. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:29267-29282. [PMID: 31396875 DOI: 10.1007/s11356-019-06019-8] [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: 01/24/2019] [Accepted: 07/22/2019] [Indexed: 06/10/2023]
Abstract
Sugarcane vinasse is the main waste stream of the Brazilian agroindustry. The typical composition of sugarcane vinasse gives it a high polluting potential that implies the necessity to define sustainable strategies for managing this waste. Knowledge of the inorganic and organic composition of vinasse and its seasonal variation is extremely important to conduct scientific research to define alternative managements for vinasse disposal other than fertigation. This study evaluated the variability of vinasse composition throughout the same harvesting season and among three harvesting seasons of one Brazilian annexed biorefinery (2015-2017). The contents of chemical oxygen demand (COD), biochemical oxygen demand (BOD5), total solids (TS), suspended solids (SS), salinity (K+, Na+, Ca2+, Mg2+, Cl-, F-), nutrients (N, P, S), trace metals (Al3+, As2+, Ba2+, Cd2+, Cr3+, Co2+, Cu2+, Fe2+, Pb2+, Mn2+, Hg2+, Mo2+, Ni2+, Se2+, Zn2+), and specific soluble organic compounds (sugars, alcohols, and organic acids), as well as pH and conductivity, were monitored in 13 samples. The results indicated that sugarcane vinasse is a suitable feedstock for biological treatments, such as anaerobic digestion processes for energy recovery, as well as substrate for biomass (e.g., microalgae, energy crops, lignocellulosic biomass) growth. The application of a previous treatment makes vinasse a more environmentally friendly natural fertilizer for land fertigation.
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Affiliation(s)
| | - Priscila Rosseto Camiloti
- Ergostech Renewable Energy Solutions, Estrada da Rhodia km 16, Vila Holândia, Campinas, SP, 13084-970, Brazil
| | - Alan Nascimento Bernardes
- Ergostech Renewable Energy Solutions, Estrada da Rhodia km 16, Vila Holândia, Campinas, SP, 13084-970, Brazil
| | - Bruna Larissa Sandy Sanchez
- Ergostech Renewable Energy Solutions, Estrada da Rhodia km 16, Vila Holândia, Campinas, SP, 13084-970, Brazil
| | - Ana Paula Rodrigues Torres
- Management of Biotechnology, Petrobras Research and Development Center (CENPES), Av. Horácio Macedo, 950, Cidade Universitária, Ilha do Fundao, Rio de Janeiro, 21941-915, Brazil
| | - Absai da Conceição Gomes
- Management of Biotechnology, Petrobras Research and Development Center (CENPES), Av. Horácio Macedo, 950, Cidade Universitária, Ilha do Fundao, Rio de Janeiro, 21941-915, Brazil
| | - Lívia Silva Botta
- Ergostech Renewable Energy Solutions, Estrada da Rhodia km 16, Vila Holândia, Campinas, SP, 13084-970, Brazil.
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