title: Bioelectrochemical desalination and electricity generation in microbial desalination cell with dewatered sludge as fuel.
abstract: Microbial desalination cells (MDCs) with common liquid anodic substrate exhibit a slow startup and destructive pH drop, and abiotic cathodes have high cost and low sustainability. A biocathode MDC with dewatered sludge as fuel was developed for synergistic desalination, electricity generation and sludge stabilization. Experimental results indicated that the startup period was reduced to 3d, anodic pH was maintained between 6.6 and 7.6, and high stability was shown under long-term operation (300d). When initial NaCl concentrations were 5 and 10g/L, the desalinization rates during stable operation were 46.37±1.14% and 40.74±0.89%, respectively. The maximum power output of 3.178W/m(3) with open circuit voltage (OCV) of 1.118V was produced on 130d. After 300d, 25.71±0.15% of organic matter was removed. These results demonstrated that dewatered sludge was an appropriate anodic substrate to enhance MDC stability for desalination and electricity generation.
authors.affiliation: School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Fanyu
authors.initials: F
authors.lastname: Meng
authors.affiliation: School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Junqiu
authors.initials: J
authors.lastname: Jiang
authors.affiliation: School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China; State Key Laboratory of Urban Water Resources and Environments (SKLUWRE), Harbin Institute of Technology, Harbin 150090, China. Electronic address: qlzhao@hit.edu.cn.
authors.forename: Qingliang
authors.initials: Q
authors.lastname: Zhao
authors.affiliation: School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China; State Key Laboratory of Urban Water Resources and Environments (SKLUWRE), Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Kun
authors.initials: K
authors.lastname: Wang
authors.affiliation: Institute of Resources and Environment Engineering, Shanxi University, Taiyuan 030006, China.
authors.forename: Guodong
authors.initials: G
authors.lastname: Zhang
authors.affiliation: School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Qingxin
authors.initials: Q
authors.lastname: Fan
authors.affiliation: School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Liangliang
authors.initials: L
authors.lastname: Wei
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 Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Zheng
mesh_terms: D064751:Ammonium Compounds / Q000032:analysis; D001674:Bioelectric Energy Sources; D019149:Bioreactors; D058266:Dielectric Spectroscopy; D004553:Electric Conductivity; D004560:Electricity; D004566:Electrodes; D006863:Hydrogen-Ion Concentration; D009930:Organic Chemicals / Q000032:analysis; D054712:Salinity; D012722:Sewage / Q000382:microbiology*; D014867:Water / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D064751:Ammonium Compounds; D009930:Organic Chemicals; D012722:Sewage; D014867:Water
keywords: Biocathodes; Desalination; Dewatered sludge; Electricity generation; Microbial desalination cell (MDC)