硫酸盐废水处理产电过程中的电子分流机制研究

为探讨废水中硫酸盐对微生物燃料电池（MFC）产电效能的影响，采用单室空气阴极MFC反应器处理模拟硫酸盐废水，并对硫酸盐的电子分流过程进行了监测。结果表明，在一定范围内，提高硫酸盐浓度能使MFC的稳定电压上升，电池持续时间延长，MFC输出功率增大。随着进水硫酸盐浓度提高，微生物产生的电子总量中，硫酸盐还原捕获的电子和通过外电路的电子所占的比例均下降，分别由12．54％和31．45％下降至7_32％和8．49％。研究表明，较低浓度硫酸盐能够提高MFC的电能输出功率，但由于硫酸盐的还原将消耗掉大量电子，进而降低MFC的库伦效率。

Research on Electronic Shunt Mechanism Generated in Sulphate Wastewater Treatment Process

In order to investigating the influence of wastewater sulphate on the electricity produc- tion efficiency of microbial fuel cells （MFC） , single chamber air cathode MFC reactor was used to treat the stimulated sulphate wastewater and electronic shunt process of sulphate wastewater was monitored in this article. The results showed that： In certain range, increasing sulphate concentra- tion could make MFC regulated voltage rise, extend the duration of cells, and increase the output power of MFC. With the increase of sulphate concentration, the ratios of electrons trapped by sul- phate reduction and that go through the external circuit were both declined, respectively from 12.54% and 31.45% to 7.32% and 8.49%. Research showed that the sulphate with lower concen- tration could increase the output power of MFC, the coulombic efficiency of MFC decreased be- cause the reduction of sulphate consumed a large amount of electrons.