Quick start-up and performance of microbial fuel cell enhanced with a polydiallyldimethylammonium chloride modified carbon felt anode

作者：Zhong, Dengjie; Liao, Xinrong; Liu, Yaqi; Zhong, Nianbing; Xu, Yunlan^*

来源：Biosensors and Bioelectronics, 2018, 119: 70-78.

DOI：10.1016/j.bios.2018.07.069

• Microbial Fuel Cell
• Quick start-up
• Polydiallyldimethylammonium chloride
• Anode
• Electricity generation
• Dye wastewater

It is of significant importance to simultaneously shorten the start-up time and enhance the electricity generation performance for practical application of microbial fuel cell (MFC). In this paper, the polydiallyldimethylammonium chloride (PDDA) modified carbon felt (PDDA-CF) electrode was prepared and used as the anode of PDDA-MFC. The anode significantly enhanced the start-up speed and electricity generation and dye wastewater degradation performances of the PDDA-MFC. The start-up time of PDDA-MFC is only 9 h, which is only 7.5% that of the unmodified carbon felt anode MFC (CF-MFC). The charge transfer resistance, the maximum output voltage and the maximum output power density of PDDA-MFC were 9.7 Omega, 741 mV and 537.8 mW(-2) respectively, which were 70.3% lower than, 1.7 times and 3.3 times greater than those of CF-MFC respectively. In addition, the color and chemical oxygen demand (COD) removal rates of Reactive Brilliant Red X-3B for PDDA-MFC reached 95.94% and 64.24% at 24 h respectively, which were 41.5% and 51.2% higher than those of CF-MFC respectively. Due to the electrostatic attraction of PDDA, the adhesion and metabolic mass transfer rate of exoelectrogens are accelerated, thus the PDDA-CF electrode has excellent electrochemical properties and bioaffinity. This paper provides a new idea to enhance the start-up speed and performance of MFC simultaneously.

• 出版日期2018-11-15
• 单位重庆理工大学