title: Effects of varying the ratio of cooked to uncooked potato on the microbial fuel cell treatment of common potato waste.
abstract: The effect of varying the ratio of cooked to uncooked potato in the performance of microbial fuel cell (MFC) treating common potato waste was investigated. Four MFCs were fed with a ratio of cooked (boiled) to uncooked (i.e. waste) potato of 0, 48.7, 67.3 and 85.6%. Respectively, the columbic efficiency was estimated as 53.5, 70.5, 92.7 and 71.1%, indicating significantly enhanced electricity generation and waste degradation at an initial feedstock mixing ratio of 2/3 cooked to 1/3 uncooked potato. The hydrolysis rate parameter (estimated using a first-order sequential hydrolysis and degradation model) increased from 0.061 to 0.191day(-1) as cooked potato was added which increased electricity generation efficiency from 24.6 to 278.9mA/m(2)/d and shortened the startup time for maximum current density from 25 to 5days. The potato slurries' chemical oxygen demand (COD) decreased by 86.6, 83.9, 84.1 and 86.3%, respectively, indicating no relationship exists between the fraction of boiled potato and the amount of COD reduction.
authors.affiliation: Graduate School of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan. Electronic address: t3812005@edu.gifu-u.ac.jp.
authors.forename: Haixia
authors.initials: H
authors.lastname: Du
authors.affiliation: River Basin Research Center, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan.
authors.forename: Fusheng
authors.initials: F
authors.lastname: Li
mesh_terms: D001674:Bioelectric Energy Sources; D057919:Biological Oxygen Demand Analysis; D003296:Cooking; D005232:Fatty Acids, Volatile / Q000032:analysis; D005735:Garbage; D012037:Refuse Disposal / Q000379:methods*; D011198:Solanum tuberosum
chemical_list: D005232:Fatty Acids, Volatile
keywords: Dissolved organic matter; Electricity generation; Microbial fuel cell; Vegetable waste; Volatile fatty acids