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Gharbi R, Omanovic S, Hrapovic S, Nwanebu E, Tartakovsky B. The Effect of Bismuth and Tin on Methane and Acetate Production in a Microbial Electrosynthesis Cell Fed with Carbon Dioxide. Molecules 2024; 29:462. [PMID: 38257375 PMCID: PMC10821527 DOI: 10.3390/molecules29020462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 01/05/2024] [Accepted: 01/11/2024] [Indexed: 01/24/2024] Open
Abstract
This study investigates the impacts of bismuth and tin on the production of CH4 and volatile fatty acids in a microbial electrosynthesis cell with a continuous CO2 supply. First, the impact of several transition metal ions (Ni2+, Fe2+, Cu2+, Sn2+, Mn2+, MoO42-, and Bi3+) on hydrogenotrophic and acetoclastic methanogenic microbial activity was evaluated in a series of batch bottle tests incubated with anaerobic sludge and a pre-defined concentration of dissolved transition metals. While Cu is considered a promising catalyst for the electrocatalytic conversion of CO2 to short chain fatty acids such as acetate, its presence as a Cu2+ ion was demonstrated to significantly inhibit the microbial production of CH4 and acetate. At the same time, CH4 production increased in the presence of Bi3+ (0.1 g L-1) and remained unchanged at the same concentration of Sn2+. Since Sn is of interest due to its catalytic properties in the electrochemical CO2 conversion, Bi and Sn were added to the cathode compartment of a laboratory-scale microbial electrosynthesis cell (MESC) to achieve an initial concentration of 0.1 g L-1. While an initial increase in CH4 (and acetate for Sn2+) production was observed after the first injection of the metal ions, after the second injection, CH4 production declined. Acetate accumulation was indicative of the reduced activity of acetoclastic methanogens, likely due to the high partial pressure of H2. The modification of a carbon-felt electrode by the electrodeposition of Sn metal on its surface prior to cathode inoculation with anaerobic sludge showed a doubling of CH4 production in the MESC and a lower concentration of acetate, while the electrodeposition of Bi resulted in a decreased CH4 production.
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Affiliation(s)
- Rihab Gharbi
- Department of Chemical Engineering, McGill University, 3610 University St., Montreal, QC H3A 0C5, Canada
- National Research Council of Canada, 6100 Royalmount Avenue, Montreal, QC H4P 2R2, Canada
| | - Sasha Omanovic
- Department of Chemical Engineering, McGill University, 3610 University St., Montreal, QC H3A 0C5, Canada
| | - Sabahudin Hrapovic
- National Research Council of Canada, 6100 Royalmount Avenue, Montreal, QC H4P 2R2, Canada
| | - Emmanuel Nwanebu
- National Research Council of Canada, 6100 Royalmount Avenue, Montreal, QC H4P 2R2, Canada
| | - Boris Tartakovsky
- National Research Council of Canada, 6100 Royalmount Avenue, Montreal, QC H4P 2R2, Canada
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Ma WJ, Cheng YF, Jin RC. Comprehensive evaluation of the long-term effect of Cu 2+ on denitrifying granular sludge and feasibility of in situ recovery by phosphate. JOURNAL OF HAZARDOUS MATERIALS 2022; 422:126901. [PMID: 34419849 DOI: 10.1016/j.jhazmat.2021.126901] [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: 05/19/2021] [Revised: 07/18/2021] [Accepted: 08/11/2021] [Indexed: 06/13/2023]
Abstract
With increased industrial development, vast heavy metals are inevitably discharged into wastewater. Cu2+ is one of the most hazardous heavy metals in biotreatment. However, the potential effect of Cu2+ on denitrifying granular sludge is still unknown. This work assesses the response of denitrifying granular sludge to Cu2+ stress from multiple aspects. The denitrifying granular sludge could tolerate 5 mg L-1 Cu2+, while the nitrogen removal efficiency decreased to 48.5% under 10 mg L-1 Cu2+. Enzyme activity and carbohydrate metabolism were inhibited, and the denitrifying bacteria were washed out under Cu2+ stress. The resulting deteriorated state was reversed by phosphate. The nitrogen removal efficiency recovered to 99% after 10 days, and the enzyme activity also recovered to the original level. Membrane transport, transcription and cellular processes were promoted. Overall, the results of this work provide a feasible strategy to rapidly restore the metabolic activity of denitrifying granular sludge under Cu2+ stress.
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Affiliation(s)
- Wen-Jie Ma
- Laboratory of Water Pollution Remediation, School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
| | - Ya-Fei Cheng
- Laboratory of Water Pollution Remediation, School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
| | - Ren-Cun Jin
- Laboratory of Water Pollution Remediation, School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China.
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Cai Y, Zheng Z, Wang X. Obstacles faced by methanogenic archaea originating from substrate-driven toxicants in anaerobic digestion. JOURNAL OF HAZARDOUS MATERIALS 2021; 403:123938. [PMID: 33264986 DOI: 10.1016/j.jhazmat.2020.123938] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 09/01/2020] [Accepted: 09/02/2020] [Indexed: 06/12/2023]
Abstract
Anaerobic digestion (AD) is used to treat waste and produce bioenergy. However, toxicants, which originate from the substrate, can inhibit or damage the digestion process. Methanogenic archaea (MA), which are the executor in the methanogenesis stage, are more sensitive than bacteria to these toxicants. This review discusses the effects of substrate-driven toxicants, namely, antibiotics, H2S and sulfate, heavy metals (HMs), long-chain fatty acids (LCFAs), and ammonia nitrogen, on the activity of MAs, methanogenic pathways, and the inter-genus succession of MAs. The adverse effects of these five toxicants on MA include effects on pH, damages to cell membranes, the prevention of protein synthesis, changes in hydrogen partial pressure, a reduction in the bioavailability of trace elements, and hindrance of mass transfer. These effects cause a reduction in MA activity and the succession of MAs and methanogenic pathways, which affect AD performance. Under the stress of these toxicants, succession occurs among HA (hydrogenotrophic methanogen), AA (acetoclastic methanogen), and MM (methylotrophic methanogen), especially HA gradually replaces AA as the dominant MA. Simultaneously, the dominant methanogenic pathway also changes from the aceticlastic pathway to other methanogenic pathways. A comprehensive understanding of the impact of toxicants on MA permits more specific targeting when developing strategies to mitigate or eliminate the effects of these toxicants.
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Affiliation(s)
- Yafan Cai
- College of Agronomy and Biotechnology/Biomass Engineering Center, China Agricultural University, Beijing 100193, China; Department of Biochemical conversion, Deutsches Biomassforschungszentrum gemeinnütziges GmbH, Torgauer Straße116, 04347 Leipzig, Germany
| | - Zehui Zheng
- College of Agronomy and Biotechnology/Biomass Engineering Center, China Agricultural University, Beijing 100193, China
| | - Xiaofen Wang
- College of Agronomy and Biotechnology/Biomass Engineering Center, China Agricultural University, Beijing 100193, China.
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Chan PC, Lu Q, de Toledo RA, Gu JD, Shim H. Improved anaerobic co-digestion of food waste and domestic wastewater by copper supplementation - Microbial community change and enhanced effluent quality. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 670:337-344. [PMID: 30904647 DOI: 10.1016/j.scitotenv.2019.03.081] [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: 12/07/2018] [Revised: 03/04/2019] [Accepted: 03/06/2019] [Indexed: 06/09/2023]
Abstract
Anaerobic co-digesters are biorefineries for energy recovery from food waste and domestic wastewater via methane production. Nonetheless, the performance of this technology was not always satisfied due to the long chain fatty acids (LCFAs) generation from food waste. Micronutrient supplementation is an effective strategy that could be applied during the anaerobic (co-)digestion to further enhance the digestion efficiency while treating food waste. In this study, supplementing copper (as CuSO4 and CuCl2) at 10, 30, and 50 mg/L Cu2+ was selected to further enhance the methane production of anaerobic co-digester while treating food waste and domestic wastewater. Overall, with the supplementation of copper, the chemical oxygen demand (COD) removal efficiency was over 90%, while higher methane yields (0.260-0.325 L CH4/g COD removed) were obtained compared to the control without supplementation (0.175 L CH4/g COD removed). For the cumulative methane yield, the highest increment of 94.1% was obtained when 10 mg/L of Cu2+ were added. The results showed copper as a cofactor of many microbial enzymes and coenzymes involved in the methane production further improved both methane production and COD removal efficiency. Meanwhile, the microbial community analysis verified the copper supplementation significantly changed the bacterial communities but with the limited effect on the diversity of archaea. Furthermore, since the anaerobic co-digester was not that much efficient on the nutrients removal, the effluent from the upflow anaerobic sludge blanket (UASB) reactor was further treated by the anaerobic/anoxic/oxic (A2O) rector and the resulting effluent reached the satisfying quality in terms of COD, total nitrogen (TN), and NH3-N removal, meeting the regional effluent discharge limits.
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Affiliation(s)
- Pak Chuen Chan
- Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Macau
| | - Qihong Lu
- Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Macau; School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, China
| | - Renata Alves de Toledo
- Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Macau
| | - Ji-Dong Gu
- School of Biological Sciences, The University of Hong Kong, Hong Kong, China
| | - Hojae Shim
- Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Macau.
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Guo Q, Majeed S, Xu R, Zhang K, Kakade A, Khan A, Hafeez FY, Mao C, Liu P, Li X. Heavy metals interact with the microbial community and affect biogas production in anaerobic digestion: A review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 240:266-272. [PMID: 30952047 DOI: 10.1016/j.jenvman.2019.03.104] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 02/19/2019] [Accepted: 03/21/2019] [Indexed: 06/09/2023]
Abstract
Heavy metals (HMs), which accumulate in digestion substrates, such as plant residues and livestock manure, can affect biogas yields during anaerobic digestion (AD). Low concentration of Cu2+ (0-100 mg/L), Fe2+ (50-4000 mg/L), Ni2+ (0.8-50 mg/L), Cd2+ (0.1-0.3 mg/L), and Zn2+ (0-5 mg/kg) promote biogas production, while high concentrations inhibit AD. Trace amounts of HMs are necessary for the activity of some enzymes. For example, Cu2+ and Cd2+ serve as cofactors in the catalytic center of cellulase and stimulate enzyme activity. High contents of Cd2+ and Cu2+ inhibit enzyme activity by disrupting protein structures. Trace amounts of HMs stimulate the growth and activity of methanogens, while high levels have toxic effects on methanogens. HMs affect the hydrolysis, acidification, and other biochemical reactions of organics in AD by changing the enzyme structure and they also impact methanogen growth. A better understanding of the impact of HMs on AD can provide valuable insights for improving the digestion of poultry manure and plant residues contaminated with HMs, as well as help mitigate HMs pollution. Although several studies have been conducted in this field, few comprehensive reviews have examined the effect of many common HMs on AD. This review summarizes the effects of HMs on the biogas production efficiency of AD and also discusses the effects of HMs on the activities of enzymes and microbial communities.
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Affiliation(s)
- Qian Guo
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, Tianshuinanlu #222, Lanzhou 730000, Gansu, China
| | - Sabahat Majeed
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, Tianshuinanlu #222, Lanzhou 730000, Gansu, China; Department of Biosciences, COMSATS University Islamabad, Pakistan
| | - Rong Xu
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, Tianshuinanlu #222, Lanzhou 730000, Gansu, China
| | - Kai Zhang
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, Tianshuinanlu #222, Lanzhou 730000, Gansu, China
| | - Apurva Kakade
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, Tianshuinanlu #222, Lanzhou 730000, Gansu, China
| | - Aman Khan
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, Tianshuinanlu #222, Lanzhou 730000, Gansu, China
| | | | - Chunlan Mao
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, Tianshuinanlu #222, Lanzhou 730000, Gansu, China
| | - Pu Liu
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, Tianshuinanlu #222, Lanzhou 730000, Gansu, China
| | - Xiangkai Li
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, Tianshuinanlu #222, Lanzhou 730000, Gansu, China.
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Chan PC, Toledo RAD, Iu HI, Shim H. Co-digestion of food waste and domestic wastewater – effect of copper supplementation on biogas production. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.egypro.2018.10.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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7
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Variation in the performance and sludge characteristics of anaerobic ammonium oxidation inhibited by copper. Sep Purif Technol 2015. [DOI: 10.1016/j.seppur.2014.11.048] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Wang W, Yang Q, Zheng S, Wu D. Anaerobic membrane bioreactor (AnMBR) for bamboo industry wastewater treatment. BIORESOURCE TECHNOLOGY 2013; 149:292-300. [PMID: 24121371 DOI: 10.1016/j.biortech.2013.09.068] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Revised: 09/14/2013] [Accepted: 09/17/2013] [Indexed: 06/02/2023]
Abstract
Bamboo industry wastewater (BIWW) poses severe environmental problems because of its high organic matter content. In this study, anaerobic membrane bioreactor (AnMBR) was applied for BIWW treatment. During the start-up stage, the system presented an effective degradation with a final COD removal of 91%. Compared to the intermittent mode, a higher membrane rejection (45% COD, 60% NH3-N) was obtained when the system was operated continuously. N2 flushing was applied for membrane cleaning, and the cleaning efficiency was significantly influenced by the hydraulic retention time (HRT). While operated under HRT ≥ 5 d, membrane fouling could be effectively controlled. Scanning electron microscopy-energy dispersive X-ray (SEM-EDX) analysis indicated the membrane top area suffered the most serious fouling. Gel permeation chromatography (GPC) and gas chromatography-mass spectrometry (GC-MS) analyses revealed most organic matter in BIWW was eliminated by AnMBR. However, benzene and fluoro derivatives were detected in the permeate as the by-products.
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Affiliation(s)
- Wei Wang
- Zhejiang Hi-Legend Environmental Science and Technology Company, Ltd., Hangzhou 310000, PR China; College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310029, PR China
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Pozdniakova TA, Costa JC, Santos RJ, Alves MM, Boaventura RAR. Anaerobic biodegradability of Category 2 animal by-products: methane potential and inoculum source. BIORESOURCE TECHNOLOGY 2012; 124:276-282. [PMID: 22989655 DOI: 10.1016/j.biortech.2012.08.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Revised: 08/03/2012] [Accepted: 08/06/2012] [Indexed: 06/01/2023]
Abstract
Category 2 animal by-products that need to be sterilized with steam pressure according Regulation (EC) 1774/2002 are studied. In this work, 2 sets of experiments were performed in mesophilic conditions: (i) biomethane potential determination testing 0.5%, 2.0% and 5.0% total solids (TS), using sludge from the anaerobic digester of a wastewater treatment plant as inoculum; (ii) biodegradability tests at a constant TS concentration of 2.0% and different inoculum sources (digested sludge from a wastewater treatment plant; granular sludge from an upflow anaerobic sludge blanket reactor; leachate from a municipal solid waste landfill; and sludge from the slaughterhouse wastewater treatment anaerobic lagoon) to select the more adapted inoculum to the substrate in study. The higher specific methane production was of 317 mL CH(4)g(-1) VS(substrate) for 2.0% TS. The digested sludge from the wastewater treatment plant led to the lowest lag-phase period and higher methane potential rate.
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Affiliation(s)
- Tatiana A Pozdniakova
- LSRE-Laboratory of Separation and Reaction Engineering-Associate Laboratory LSRE/LCM, Faculdade de Engenharia, Universidade do Porto, Porto, Portugal
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Wu D, Yang Z, Wang W, Tian G, Xu S, Sims A. Ozonation as an advanced oxidant in treatment of bamboo industry wastewater. CHEMOSPHERE 2012; 88:1108-1113. [PMID: 22668599 DOI: 10.1016/j.chemosphere.2012.05.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2012] [Revised: 05/06/2012] [Accepted: 05/07/2012] [Indexed: 06/01/2023]
Abstract
The present study employed ozonation process to treat the bamboo industry wastewater (BIWW). The impact of ozone dosage and initial organic concentration on color, COD and TOC removal rates were studied along with characterization of the major organics in raw and treated wastewater. The results suggested the ozone dosage of 3.15 g h(-1) (concentration 52.5 mg L(-1)) was suitable for the treatment. After 25 min ozonation of 1L raw wastewater, the color, COD and TOC removal efficiencies were 95%, 56% and 40%, respectively, with an influent COD concentration of 835 mg L(-1). The ratio of kg O(3) kg(-1) COD at 3.15 g h(-1) was 2.8 (<3), revealing that ozonation was a cost effective process for tertiary treatment of BIWW. Longer oxidization time was required to achieve similar results for raw wastewater with higher COD concentration. The chromatogram from gel permeation chromatography revealed that ozonation resulted in the breakdown of high molecular weight compounds into lower molecular weight components but could not completely mineralize the organic matter. The majority of these compounds were identified in both raw and ozonated samples via GC-MS analysis. In addition to ester derivatives as the main intermediates of ozonation, 1-chloroctadecane, methyl stearate, benzophenone and α-cyperone were identified as the by-products of ozonation.
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Affiliation(s)
- Donglei Wu
- College of Environmental and Resources, Zhejiang University, Hangzhou 310029, PR China.
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Abstract
Anaerobic digestion is a widely applied technology to produce biogas from organic wastewater. The biogas calorific value depends on the methane-content. For biogas flows >100 m3/h, the two-step process is usually used for production of high calorific biogas from organic wastewater: the first step, anaerobic digestion; the second step, biogas purification. However, for biogas flows 3/h, biogas purification is not economical, and one-step process according to the big gap between methane and non-methane-gas in solubility at higher pressure or lower temperature, should be condidered. New anaerobic digestion processes, such as micro-aerobic process, electrolysis enhancing methane production process, process of internal circulation anaerobic digester (ICAD) with sewage source heat pump, may all enhance biogas producton or lower biogas production cost. In addition, suitable environmental conditions, such as organic loading rate (OLR), solid retention time (SRT), hydraulic retention time (HRT) and surface area, are all beneficial to enhance methane fermentation. Furthermore, new operation modes and optimal dose of trace metals might be selected.
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