title: Biodegradation of organic matter and anodic microbial communities analysis in sediment microbial fuel cells with/without Fe(III) oxide addition.
abstract: To enhance the biodegradation of organic matter in sediment microbial fuel cell (SMFC), Fe(III) oxide, as an alternative electron acceptor, was added into the sediment. Results showed that the SMFC with Fe(III) oxide addition obtained higher removal efficiencies for organics than the SMFC without Fe(III) oxide addition and open circuit bioreactor, and produced a maximum power density (Pmax) of 87.85mW/m2with a corresponding maximum voltage (Vmax) of 0.664V. The alteration of UV-254 and specific ultraviolet absorbance (SUVA) also demonstrated the organic matter in sediments can be effectively removed. High-throughput sequencing of anodic microbial communities indicated that bacteria from the genus Geobacter were predominantly detected (21.23%) in the biofilm formed on the anode of SMFCs, while Pseudomonas was the most predominant genus (18.12%) in the presence of Fe(III) oxide. Additionally, compared with the open circuit bioreactor, more electrogenic bacteria attached to the biofilm of anode in SMFCs.
authors.affiliation: School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Xun
authors.initials: X
authors.lastname: Xu
authors.affiliation: School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China; State Key Laboratory of Urban Water Resources and Environments (SKLURE), Harbin Institute of Technology, Harbin 150090, China. Electronic address: qlzhao@hit.edu.cn.
authors.forename: Qingliang
authors.initials: Q
authors.lastname: Zhao
authors.affiliation: College of Resources and Civil Engineering, Northeastern University, Shenyang 100819, China.
authors.forename: Mingsong
authors.initials: M
authors.lastname: Wu
authors.affiliation: School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Ding
authors.affiliation: School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Weixian
authors.initials: W
authors.lastname: Zhang
mesh_terms: D001673:Biodegradation, Environmental; D001674:Bioelectric Energy Sources / Q000382:microbiology*; D004566:Electrodes / Q000382:microbiology*; D005296:Ferrous Compounds / Q000737:chemistry; D045302:Geobacter / Q000502:physiology; D019015:Geologic Sediments / Q000382:microbiology; D059013:Microbial Consortia / Q000502:physiology*; D013056:Spectrophotometry, Ultraviolet
chemical_list: D005296:Ferrous Compounds; C034236:ferrous oxide
keywords: Fe(III) oxide; Microbial communities; Organics removal; Power output; Sediment microbial fuel cells