title: Enhancing the bioremediation by harvesting electricity from the heavily contaminated sediments.
abstract: To test the long-term applicability of scaled-up sediment microbial fuel cells (SMFCs) in simultaneous bioremediation of toxic-contaminated sediments and power-supply for electronic devices, a 100 L SMFC inoculate with heavily contaminated sediments has been assembled and operated for over 2 years without external electron donor addition. The total organic chemical (TOC) degradation efficiency was 22.1% in the electricity generating SMFCs, which is significantly higher than that in the open-circuited SMFC (3.8%). The organic matters including contaminants in the contaminated sediments were sufficient for the electricity generation of SMFCs, even up to 8.5 years by the present SMFC theoretically. By using a power management system (PMS), the SMFC electricity could be harvested into batteries and used by commercial electronic devices. The results indicated that the SMFC-PMS system could be applied as a long-term and effective tool to simultaneously stimulate the bioremediation of the contaminated sediments and supply power for commercial devices.
authors.affiliation: Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, Guangzhou, China; State Key Laboratory of Applied Microbiology Southern China, Guangzhou, China.
authors.forename: Yonggang
authors.initials: Y
authors.lastname: Yang
authors.affiliation: Guofang Science and Technology Technician Institute of Guangdong Province, Guangzhou, China.
authors.forename: Zijiang
authors.initials: Z
authors.lastname: Lu
authors.affiliation: Guangdong Vocational College of Electronic Technology, Guangzhou, China.
authors.forename: Xunke
authors.initials: X
authors.lastname: Lin
authors.affiliation: State Key Laboratory of Applied Microbiology Southern China, Guangzhou, China.
authors.forename: Chunyu
authors.initials: C
authors.lastname: Xia
authors.affiliation: Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, Guangzhou, China; State Key Laboratory of Applied Microbiology Southern China, Guangzhou, China.
authors.forename: Guoping
authors.initials: G
authors.lastname: Sun
authors.affiliation: State Key Laboratory of Applied Microbiology Southern China, Guangzhou, China.
authors.forename: Yingli
authors.initials: Y
authors.lastname: Lian
authors.affiliation: Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, Guangzhou, China; State Key Laboratory of Applied Microbiology Southern China, Guangzhou, China. Electronic address: xumy@gdim.cn.
authors.forename: Meiying
authors.initials: M
authors.lastname: Xu
mesh_terms: D001673:Biodegradation, Environmental; D001674:Bioelectric Energy Sources; D004560:Electricity; D019015:Geologic Sediments / Q000737:chemistry*; D009930:Organic Chemicals / Q000032:analysis; D010084:Oxidation-Reduction; D012989:Soil Pollutants / Q000737:chemistry*
chemical_list: D009930:Organic Chemicals; D012989:Soil Pollutants
keywords: Bioremediation; Microbial fuel cells; Power management system; Sediments