title: Electricity production and benzene removal from groundwater using low-cost mini tubular microbial fuel cells in a monitoring well.
abstract: A low-cost mini tubular microbial fuel cell (MFC) was developed for treating groundwater that contained benzene in monitoring wells. Experimental results indicate that increasing the length and density, and reducing the size of the char particles in the anode effectively reduced the internal resistance. Additionally, a thinner polyvinyl alcohol (PVA) hydrogel separator and PVA with a higher molecular weight improved electricity generation. The optimal parameters for the MFC were an anode density of 1.22 g cm-3, a coke of 150 μm, an anode length of 6 cm, a PVA of 105,600 g mol-1, and a separator thickness of 1 cm. Results of continuous-flow experiments reveal that the increasing the sets of MFCs and connecting them in parallel markedly improved the degradation of benzene. More than 95% of benzene was removed and electricity of 38 mW m-2was generated. The MFC ran continuously up to 120 days without maintenance.
authors.affiliation: Department of Public Health, Chung-Shan Medical University, Taichung 402, Taiwan, ROC; Department of Family and Community Medicine, Chung Shan Medical University Hospital, Taichung 402, Taiwan, ROC.
authors.forename: Shih-Hsien
authors.initials: SH
authors.lastname: Chang
authors.affiliation: Department of Safety, Health and Environmental Engineering, National Yunlin University of Science and Technology, Yunlin 64002, Taiwan, ROC.
authors.forename: Chih-Hung
authors.initials: CH
authors.lastname: Wu
authors.affiliation: Department of Safety, Health and Environmental Engineering, National Yunlin University of Science and Technology, Yunlin 64002, Taiwan, ROC.
authors.forename: Ruei-Cyun
authors.initials: RC
authors.lastname: Wang
authors.affiliation: Department of Safety, Health and Environmental Engineering, National Yunlin University of Science and Technology, Yunlin 64002, Taiwan, ROC. Electronic address: Linwen@yuntech.edu.tw.
authors.forename: Chi-Wen
authors.initials: CW
authors.lastname: Lin
mesh_terms: D001554:Benzene; D001674:Bioelectric Energy Sources; D004560:Electricity; D004566:Electrodes; D060587:Groundwater
chemical_list: D001554:Benzene
keywords: Benzene; Electricity production; Microbial fuel cell (MFC); Monitoring well; Polyvinyl alcohol (PVA)