Enhancing sulfate reduction efficiency in microbial electrolysis cells : the impact of mixing conditions and heavy metal concentrations on functional genes, cell activity, and community structure in sulfate-laden wastewater treatment
- Author
- Weiming Chen, Ke Shi, Duc Viet Nguyen, Jianliang Xue, Qing Jiang, Di Wu (UGent) , Yanlu Qiao and An Liu
- Organization
- Abstract
- Microbial electrolysis cells (MECs) are promising for the treatment of sulfate-laden wastewater. The performance of the MEC cathode biofilms is influenced not only by the wastewater quality but also by the hydrodynamic mixing condition. Yet, the combined effects of these combined conditions have seldom been explored. This study examines the effectiveness and operational patterns of MECs in treating sulfate-laden wastewater under varying heavy-metal (Cu2+ as representative) concentrations (0-80 mg L-1) and different hydrodynamic conditions (complete-mixing (CM) and nonmixing (NM, as control)). Results showed that CM-MECs achieved higher sulfate reduction efficiency (51 to 76%) compared to NM-MECs (with 46-69% of sulfate reduction) across the range of Cu2+ concentrations. Kinetic analysis revealed that CM-MECs reduced sulfate faster due to increased expression of genes involved in sulfate reduction and electron transport. Furthermore, CM-MECs maintained intact cell structures, enhanced electron transfer, and increased the relative abundance of Desulfobulbus when treating wastewater with low Cu2+ concentrations (<40 mg L-1). Microbial defense mechanisms against Cu2+ also contributed to the enhanced sulfate reduction efficiency in the CM-MECs. These findings offer new insights into the design MECs with flowing conditions and pave the way for their future application in the treatment of heavy metal and sulfate-laden wastewater.
- Keywords
- GEOBACTER-SULFURREDUCENS, COPPER HOMEOSTASIS, MECHANISMS, RESISTANCE, PERFORMANCE, RESPONSES, REMOVAL, SYSTEMS, complete-mixing MEC (CM-MEC), sulfate-ladenwastewater, electron transfer, functional genes, cell activity
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Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-01J90JENAJ4HZW8Y9DAJKNDGW3
- MLA
- Chen, Weiming, et al. “Enhancing Sulfate Reduction Efficiency in Microbial Electrolysis Cells : The Impact of Mixing Conditions and Heavy Metal Concentrations on Functional Genes, Cell Activity, and Community Structure in Sulfate-Laden Wastewater Treatment.” ACS ES&T ENGINEERING, 2024, doi:10.1021/acsestengg.4c00421.
- APA
- Chen, W., Shi, K., Nguyen, D. V., Xue, J., Jiang, Q., Wu, D., … Liu, A. (2024). Enhancing sulfate reduction efficiency in microbial electrolysis cells : the impact of mixing conditions and heavy metal concentrations on functional genes, cell activity, and community structure in sulfate-laden wastewater treatment. ACS ES&T ENGINEERING. https://doi.org/10.1021/acsestengg.4c00421
- Chicago author-date
- Chen, Weiming, Ke Shi, Duc Viet Nguyen, Jianliang Xue, Qing Jiang, Di Wu, Yanlu Qiao, and An Liu. 2024. “Enhancing Sulfate Reduction Efficiency in Microbial Electrolysis Cells : The Impact of Mixing Conditions and Heavy Metal Concentrations on Functional Genes, Cell Activity, and Community Structure in Sulfate-Laden Wastewater Treatment.” ACS ES&T ENGINEERING. https://doi.org/10.1021/acsestengg.4c00421.
- Chicago author-date (all authors)
- Chen, Weiming, Ke Shi, Duc Viet Nguyen, Jianliang Xue, Qing Jiang, Di Wu, Yanlu Qiao, and An Liu. 2024. “Enhancing Sulfate Reduction Efficiency in Microbial Electrolysis Cells : The Impact of Mixing Conditions and Heavy Metal Concentrations on Functional Genes, Cell Activity, and Community Structure in Sulfate-Laden Wastewater Treatment.” ACS ES&T ENGINEERING. doi:10.1021/acsestengg.4c00421.
- Vancouver
- 1.Chen W, Shi K, Nguyen DV, Xue J, Jiang Q, Wu D, et al. Enhancing sulfate reduction efficiency in microbial electrolysis cells : the impact of mixing conditions and heavy metal concentrations on functional genes, cell activity, and community structure in sulfate-laden wastewater treatment. ACS ES&T ENGINEERING. 2024;
- IEEE
- [1]W. Chen et al., “Enhancing sulfate reduction efficiency in microbial electrolysis cells : the impact of mixing conditions and heavy metal concentrations on functional genes, cell activity, and community structure in sulfate-laden wastewater treatment,” ACS ES&T ENGINEERING, 2024.
@article{01J90JENAJ4HZW8Y9DAJKNDGW3,
abstract = {{Microbial electrolysis cells (MECs) are promising for the treatment of sulfate-laden wastewater. The performance of the MEC cathode biofilms is influenced not only by the wastewater quality but also by the hydrodynamic mixing condition. Yet, the combined effects of these combined conditions have seldom been explored. This study examines the effectiveness and operational patterns of MECs in treating sulfate-laden wastewater under varying heavy-metal (Cu2+ as representative) concentrations (0-80 mg L-1) and different hydrodynamic conditions (complete-mixing (CM) and nonmixing (NM, as control)). Results showed that CM-MECs achieved higher sulfate reduction efficiency (51 to 76%) compared to NM-MECs (with 46-69% of sulfate reduction) across the range of Cu2+ concentrations. Kinetic analysis revealed that CM-MECs reduced sulfate faster due to increased expression of genes involved in sulfate reduction and electron transport. Furthermore, CM-MECs maintained intact cell structures, enhanced electron transfer, and increased the relative abundance of Desulfobulbus when treating wastewater with low Cu2+ concentrations (<40 mg L-1). Microbial defense mechanisms against Cu2+ also contributed to the enhanced sulfate reduction efficiency in the CM-MECs. These findings offer new insights into the design MECs with flowing conditions and pave the way for their future application in the treatment of heavy metal and sulfate-laden wastewater.}},
author = {{Chen, Weiming and Shi, Ke and Nguyen, Duc Viet and Xue, Jianliang and Jiang, Qing and Wu, Di and Qiao, Yanlu and Liu, An}},
issn = {{2690-0645}},
journal = {{ACS ES&T ENGINEERING}},
keywords = {{GEOBACTER-SULFURREDUCENS,COPPER HOMEOSTASIS,MECHANISMS,RESISTANCE,PERFORMANCE,RESPONSES,REMOVAL,SYSTEMS,complete-mixing MEC (CM-MEC),sulfate-ladenwastewater,electron transfer,functional genes,cell activity}},
language = {{eng}},
pages = {{11}},
title = {{Enhancing sulfate reduction efficiency in microbial electrolysis cells : the impact of mixing conditions and heavy metal concentrations on functional genes, cell activity, and community structure in sulfate-laden wastewater treatment}},
url = {{http://doi.org/10.1021/acsestengg.4c00421}},
year = {{2024}},
}
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