微生物燃料电池原位修复地下水硝酸盐污染

In-situ Remediation of Nitrate Pollution in Groundwater by Microbial Fuel Cell

通过构建双室微生物燃料电池（MFC）,以阳极室有机底物作为电子供体,阴极室为模拟地下水含水层,以硝酸盐作为电子受体,进行MFC法原位修复地下水硝酸盐污染的模拟实验,研究连续流水力停留时间、阴极反硝化菌抑制以及盐桥数对硝酸盐去除率的影响.研究结果显示：MFC法可以有效的降解硝酸盐污染,降解率达60％～70％;阴极室可以忽略反硝化菌的自养反硝化作用;延长水力停留时间和增加盐桥数都有利于提高硝酸盐的降解率.

Constructing a double chamber microbial fuel cell （MFC）. Using organic substrates in the anode chamber as electron donor. The cathode chamber is simulative groundwater aquifer and use nitrate in it as electron acceptor. Through the simulation experiments of in-situ remediation of nitrate pollution in groundwater by microbial filel cell, to study the impact of HRT, denitrifying bacteria in cathode and number of salt bridge on the nitrate removal rate. The results showed that, this method of MFC can effectively degrade nitrate pollution and the degradation rate of nitrate was 60 %-70 %, autotrophic denitrification of denitrification bacteria can be ignored in the cathode chamber, the degradation rate of nitrate can be improved by extending HRT and increasing the number of salt bridge.