Journal of the Taiwan Institute of Chemical Engineers
Abstract: An S-type flow-field pipe-microbial fuel cell (SFP-MFC) was developed to remove ethyl acetate (EA) from an air stream. Features of the SFP-MFC included the use of polyvinyl alcohol and a membrane electrode assembly (PVA-MEA) as the gas diffusion membrane and proton exchange membrane (PEM), which separated the anode from the cathode. The performance of the SFP-MFC system was evaluated with an empty bed residence time (EBRT) of 14.35 s and an organic loading rate of 63−3700 g/m3/h, with or without the modification of the PVA-MEA electrode using conductive carbon black (CCB). Experimental results revealed that the maximum elimination capacity (EC) and voltage were 2288 g/m3/h and 330 mV, respectively, which were obtained when the PVA-MEA was modified using CCB. The PVA-MEA that was modified with CCB exhibited a 90% higher EA elimination capacity than the PVA-MEA without CCB modification. Moreover, the SFP-MFC system exhibited buffering at high organic loading, reducing the microbial inhibition by toxic pollutants. The maximum EC and EBRT of the modified SFP-MFC were 3−10 times higher and 2−12 times shorter, respectively, than those of biotrickling filters.