Abstract
Six 60-L benthic microbial electrochemical systems (BMESs) were built for the bioremediation of river sediment. Carbon mesh anodes with honeycomb-structure supports were compared with horizontal anodes, and the system was tested using different cover depths and anode densities. The pollutant removal, electricity generation, and electrochemistry of the six BMES with different anodes was examined using the Ashi River (Harbin, China) as a case study. Total organic carbon and total nitrogen removal from sediments in BMES with Honeycomb-structure anodes were 20–30% and 20–33% higher for the other reactors. The maximum power densities of 43.2 mW m–2 was obtained in BMES. The maximum power densities in BMES with honeycomb-structure anodes were 10–40% higher than that of BMESs with horizontal anode reactors.
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Acknowledgements
This work was supported by the Supported by Heilongjiang Touyan Team. The research was also supported by National Key Research and Development Program of China (Grant No. 2017ZX07403001). The authors also acknowledged the support of the Independent project of North China Municipal Engineering Design and Research Institute Co., LTD (HJ-2021-32-HJY) and Ministry of Housing and Urban-Rural Development research and development projects (2020-K-038).
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Supplementary Fig. S1 Construction of the honeycomb-structure anode.
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The Funded was provided by (Grant Nos. 2017ZX07403001, HJ-2021-32-HJY, 2020-K-038).
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Li, H., Liu, G., Li, C. et al. Improved the in-situ remediation effect of benthic microbial electrochemical system by optimizing the anode structure. Biotechnol Lett 44, 729–740 (2022). https://doi.org/10.1007/s10529-022-03251-0
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DOI: https://doi.org/10.1007/s10529-022-03251-0