title: Optimization of enhanced bioelectrical reactor with electricity from microbial fuel cells for groundwater nitrate removal.
abstract: Factors influencing the performance of a continual-flow bioelectrical reactor (BER) intensified by microbial fuel cells for groundwater nitrate removal, including nitrate load, carbon source and hydraulic retention time (HRT), were investigated and optimized by response surface methodology (RSM). With the target of maximum nitrate removal and minimum intermediates accumulation, nitrate load (for nitrogen) of 60.70 mg/L, chemical oxygen demand (COD) of 849.55 mg/L and HRT of 3.92 h for the BER were performed. COD was the dominant factor influencing performance of the system. Experimental results indicated the undistorted simulation and reliable optimized values. These demonstrate that RSM is an effective method to evaluate and optimize the nitrate-reducing performance of the present system and can guide mathematical models development to further promote its practical applications.
authors.affiliation: a Key Laboratory of Groundwater Circulation and Evolution, Ministry of Education of China , School of Water Resources and Environment, China University of Geosciences Beijing , Beijing , People's Republic of China.
authors.forename: Ye
authors.initials: Y
authors.lastname: Liu
authors.affiliation: a Key Laboratory of Groundwater Circulation and Evolution, Ministry of Education of China , School of Water Resources and Environment, China University of Geosciences Beijing , Beijing , People's Republic of China.
authors.forename: Baogang
authors.initials: B
authors.lastname: Zhang
authors.affiliation: a Key Laboratory of Groundwater Circulation and Evolution, Ministry of Education of China , School of Water Resources and Environment, China University of Geosciences Beijing , Beijing , People's Republic of China.
authors.forename: Caixing
authors.initials: C
authors.lastname: Tian
authors.affiliation: a Key Laboratory of Groundwater Circulation and Evolution, Ministry of Education of China , School of Water Resources and Environment, China University of Geosciences Beijing , Beijing , People's Republic of China.
authors.forename: Chuanping
authors.initials: C
authors.lastname: Feng
authors.affiliation: a Key Laboratory of Groundwater Circulation and Evolution, Ministry of Education of China , School of Water Resources and Environment, China University of Geosciences Beijing , Beijing , People's Republic of China.
authors.forename: Zhijun
authors.initials: Z
authors.lastname: Wang
authors.affiliation: a Key Laboratory of Groundwater Circulation and Evolution, Ministry of Education of China , School of Water Resources and Environment, China University of Geosciences Beijing , Beijing , People's Republic of China.
authors.forename: Ming
authors.initials: M
authors.lastname: Cheng
authors.affiliation: a Key Laboratory of Groundwater Circulation and Evolution, Ministry of Education of China , School of Water Resources and Environment, China University of Geosciences Beijing , Beijing , People's Republic of China.
authors.forename: Weiwu
authors.initials: W
authors.lastname: Hu
mesh_terms: D001674:Bioelectric Energy Sources; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors; D004560:Electricity; D060587:Groundwater; D009566:Nitrates / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification / Q000379:methods*
chemical_list: D009566:Nitrates; D014874:Water Pollutants, Chemical
keywords: Microbial fuel cells; bioelectrical reactor; nitrate; response surface methodology