Effects of Concentration Variations on the Performance and Microbial Community in Microbial Fuel Cell Using Swine Wastewater

Hongjun Ni, Kaixuan Wang, Shuaishuai Lv, Xingxing Wang, Lu Zhuo and Jiaqiao Zhang
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Hongjun Ni: School of Mechanical Engineering, Nantong University, Nantong 226019, China
Kaixuan Wang: School of Mechanical Engineering, Nantong University, Nantong 226019, China
Shuaishuai Lv: School of Mechanical Engineering, Nantong University, Nantong 226019, China
Xingxing Wang: School of Mechanical Engineering, Nantong University, Nantong 226019, China
Lu Zhuo: School of Mechanical Engineering, Nantong University, Nantong 226019, China
Jiaqiao Zhang: School of Mechanical Engineering, Nantong University, Nantong 226019, China

Energies, 2020, vol. 13, issue 9, 1-11

Abstract: The variation of substrate concentration in anode chamber directly affects the power generation efficiency and decontamination performance of microbial fuel cell (MFC). In this study, three concentrations of swine wastewater with 800 mg/L, 1600 mg/L and 2500 mg/L were selected as substrates, and the performance of MFC and response characteristics of anode microbial community were investigated. The results show that the concentration of a selected substrate is positively correlated with the output voltage of MFC and chemical oxygen demand (COD) removal rate. The microbial community diversity in the anode chamber and the performance of battery can be significantly affected when concentration changes in different ways, which helps to selectively cultivate the adaptable dominant bacteria to enhance the stability and decontamination performance of MFC. The community structure of anodic biofilm is mainly composed of Proteobacteria, Bacteroidetes, Firmicutes, Chloroflexi and Spirochaetae. These findings are meaningful to improve the treatment effects of swine wastewater and can help to find out the mechanism of varying concentration that influences the production of microorganisms in MFC.

Keywords: microbial fuel cells; swine wastewater; concentration changes; electricity generation performance; decontamination performance; microbial community (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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