期刊
ENVIRONMENTAL POLLUTION
卷 266, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2020.115373
关键词
Algae biomass; Microbial fuel cell; Microcystin-LR; Biodegradation; Renewable energy; Wastewater treatment
资金
- National Key R&D Program of China [2017YFA0207203]
- National Natural Science Foundation of China [21976197]
- Science and Technology Service Network Initiative [KFJ-STS-ZDTP-048]
- Key Research and Development Program of Ningxia [2017BY064]
- University of Chinese Academy of Sciences (UCAS)
Effective utilization of harmful algal biomass from eutrophic lakes is required for sustainable waste management and circular bioeconomy. In this study, Microcystis aeruginosa derived biomass served as an electron donor in the microbial fuel cell (MFC) for waste treatment and electricity generation. Bioelectrochemical performance of MFC fed with microalgae (MFC-Algae) was compared with MFC fed with a commercial substrate (MFC-Acetate). Complete removal of microcystin-LR (MC-LR) and high chemical oxygen demand (COD) removal efficiency (67.5 +/- 1%) in MFC-Algae showed that harmful algal biomass could be converted into bioelectricity. Polarization curves revealed that MFC-Algae delivered the maximum power density (83 mW/m(2)) and current density (672 mA/m(2)), which was 43% and 45% higher than that of MFC-Acetate respectively. Improved electrochemical performance and substantial coulombic efficiency (7.6%) also verified the potential use of harmful algal biomass as an alternate MFC substrate. Diverse microbial community profiles showed the substrate-dependent electrogenic activities in each MFC. Biodegradation pathway of MC-LR by anodic microbes was also explored in detail. Briefly, a sustainable approach for on-site waste management of harmful algal biomass was presented, which was deprived of transportation and special pretreatments. It is anticipated that current findings will help to pave the way for practical applications of MFC technology. (C) 2020 Elsevier Ltd. All rights reserved.
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