title: Effect of the chemical oxidation demand to sulfide ratio on sulfide oxidation in microbial fuel cells treating sulfide-rich wastewater.
abstract: This work focused on studying the effect of the chemical oxidation demand to sulfide ratio (COD/S) on power generation and sulfide oxidation in microbial fuel cells treating sulfide-rich wastewater containing organic contaminants. The maximum power density achieved was 20 +/- 1 W m(-3) V(Anode) and the C(oulombic) yield was 20 +/- 2%. The COD/S ofinfluent played an important role in elemental sulfur and sulfate production because of competition between acetate oxidation and element sulfur oxidation to sulfate in the anode. When the COD/S was 12.50/1, more than 74.0% of sulfide was converted into elemental sulfur after 24 hours of operation. The effect of the COD/S on power generation was negligible when the COD/S ranged between 4.85/l and 18.53/l. After 24 hours, the COD removals were 110 +/- 6, 213 +/- 9, 375 +/- 8 and 410 +/- 10 mgl(-1) when the COD/S was 4.85/1, 8.9/1, 12.5/1 and 18.53/1, respectively. The COD removal increased with the increasing COD of the influent, which fitted to the model of first-order reaction kinetics.
authors.affiliation: School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, China. lezhanghua@ecust.edu.cn
authors.forename: Lehua
authors.initials: L
authors.lastname: Zhang
authors.forename: Yanping
authors.initials: Y
authors.lastname: Mao
authors.forename: Jingxing
authors.initials: J
authors.lastname: Ma
authors.forename: Dongmei
authors.initials: D
authors.lastname: Li
authors.forename: Haifeng
authors.initials: H
authors.lastname: Shi
authors.forename: Yongdi
authors.initials: Y
authors.lastname: Liu
authors.forename: Lankun
authors.initials: L
authors.lastname: Cai
mesh_terms: D001674:Bioelectric Energy Sources; D057919:Biological Oxygen Demand Analysis; D003080:Cold Temperature; D004202:Disinfectants; D004735:Energy Transfer; D004736:Energy-Generating Resources; D008855:Microscopy, Electron, Scanning; D010084:Oxidation-Reduction; D013440:Sulfides / Q000737:chemistry*; D062065:Wastewater / Q000737:chemistry*
chemical_list: D004202:Disinfectants; D013440:Sulfides; D062065:Wastewater