摘要：The anodic electron transfer process is a key factor in determining the electricity production capacity of microbial fuel cells (MFCs). Optimization of anode transfer mechanism in MFCs is essential to improve its electricity production capacity. In this study, we construct three different microbial fuel cells, namely uncoated-MFC(non-packet MFC), coated-MFC and AQDS(anthraquinone-2,6-disulfonate, A〇DS)-MFC, with Rhodospirillum as the catalyst to treat polyether wastewater and study their electron transfer mechanism in regards to the electricity production capacity. Our findings show that during the treatment of polyether wastewater in the anode, microorganisms transfer electrons through both direct contact and electronic shuttle mechanisms, and the electricity generated from the direct contact mechanism is 1.79 times of that from the electronic shuttle mechanism. The performance of AQDSop- timized MFC is further improved with a shorter startup time by 4 h, and an increase of the maximum output current by 50% and electricity production by 39. 5%.
