title: Investigation and optimization of the novel UASB-MFC integrated system for sulfate removal and bioelectricity generation using the response surface methodology (RSM).
abstract: COD/sulfate ratio and hydraulic residence time (HRT), both of which influence sulfate loadings jointly, are recognized as the most two important affecting factors for sulfate removal and bioelectricity generation in the novel up-flow anaerobic sludge blanket reactor-microbial fuel cell (UASB-MFC) integrated system. The response surface methodology (RSM) was employed for the optimization of this system and the optimum condition with COD/sulfate ratio of 2.3 and HRT of 54.3h was obtained with the target of maximizing the power output. In terms of maximizing the total sulfate removal efficiency, the obtained optimum condition was COD/sulfate ratio of 3.7 and HRT of 55.6h. Experimental results indicated the undistorted simulation and reliable optimized results. These demonstrated that RSM was effective to evaluate and optimize the UASB-MFC system for sulfate removal and energy recovery, providing a promising guide to further improvement of the system for potential applications.
authors.affiliation: School of Water Resources and Environment, China University of Geosciences (Beijing), Key Laboratory of Groundwater Circulation and Evolution, Ministry of Education, Beijing 100083, China. zbgcugb@gmail.com
authors.forename: Baogang
authors.initials: B
authors.lastname: Zhang
authors.forename: Jing
authors.initials: J
authors.lastname: Zhang
authors.forename: Qi
authors.initials: Q
authors.lastname: Yang
authors.forename: Chuanping
authors.initials: C
authors.lastname: Feng
authors.forename: Yuling
authors.initials: Y
authors.lastname: Zhu
authors.forename: Zhengfang
authors.initials: Z
authors.lastname: Ye
authors.forename: Jinren
authors.initials: J
authors.lastname: Ni
mesh_terms: D001674:Bioelectric Energy Sources; D019149:Bioreactors; D004560:Electricity; D013431:Sulfates / Q000302:isolation & purification*; D013499:Surface Properties; D018511:Systems Integration
chemical_list: D013431:Sulfates