title: Performance of a microbial fuel cell-based biosensor for online monitoring in an integrated system combining microbial fuel cell and upflow anaerobic sludge bed reactor.
abstract: A hybrid system integrating a microbial fuel cell (MFC)-based biosensor with upflow anaerobic sludge blanket (UASB) was investigated for real-time online monitoring of the internal operation of the UASB reactor. The features concerned were its rapidity and steadiness with a constant operation condition. In addition, the signal feedback mechanism was examined by the relationship between voltage and time point of changed COD concentration. The sensitivity of different concentrations was explored by comparing the signal feedback time point between the voltage and pH. Results showed that the electrical signal feedback was more sensitive than pH and the thresholds of sensitivity were S=3×10(-5)V/(mg/L) and S=8×10(-5)V/(mg/L) in different concentration ranges, respectively. Although only 0.94% of the influent COD was translated into electricity and applied for biosensing, this integrated system indicated great potential without additional COD consumption for real-time monitoring.
authors.affiliation: State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, China; School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China. Electronic address: ajiahui@163.com.
authors.forename: Hui
authors.initials: H
authors.lastname: Jia
authors.affiliation: State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, China; School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China.
authors.forename: Guang
authors.initials: G
authors.lastname: Yang
authors.affiliation: State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, China; School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Wang
authors.affiliation: Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia.
authors.forename: Huu Hao
authors.initials: HH
authors.lastname: Ngo
authors.affiliation: Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia.
authors.forename: Wenshan
authors.initials: W
authors.lastname: Guo
authors.affiliation: State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, China.
authors.forename: Hongwei
authors.initials: H
authors.lastname: Zhang
authors.affiliation: School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China.
authors.forename: Xinbo
authors.initials: X
authors.lastname: Zhang
mesh_terms: D000693:Anaerobiosis; D001674:Bioelectric Energy Sources; D019149:Bioreactors; D015374:Biosensing Techniques; D015203:Reproducibility of Results; D012722:Sewage / Q000737:chemistry*; D018508:Water Purification / Q000295:instrumentation / Q000379:methods
chemical_list: D012722:Sewage
keywords: Biosensor; Microbial fuel cell; Sensitivity; Signal feedback; Upflow anaerobic sludge blanket