Different voltages were applied to anaerobic treatment to investigate the enhancement effects and the changes of microbial community structure. The results indicated that the best appropriate voltage was 0.10 V, COD removal increased by 16.72% at first 6 h and cumulative CH₄ production increased by 23.39%. Average methane yield was 15.69% higher than that of control. The sludge measurements indicated that voltage addition could promote the interspecies electron transfer to produce more methane. The strengthening effect of voltage could be sustained for a short period of time when the voltage was removed. Microbial community analysis revealed that the changes of Methanothrix and Methanolinea resulted in higher biogas production. The increases of Smithella and Geobacter improved the possibility of “electronic syntrophism” between microorganisms and promoted the performance of DIET process. The results would provide the theoretical supports for enhancing the anaerobic treatment efficiency by voltages.

采用不同的电压进行厌氧处理，以研究其增强作用和微生物群落结构的变化。结果表明，最合适的电压为0.10 V，开始6 h COD去除量增加了16.72％，CH _4的累积产生量增加了23.39％。平均甲烷产率比对照高15.69％。污泥的测量表明，添加电压可以促进种间电子转移以产生更多的甲烷。当去除电压时，电压的增强效果可以维持很短的时间。微生物群落分析表明，甲氨蝶呤和甲醇的变化导致沼气产量增加。的增加Smithella和Geobacter提高了微生物之间“电子同养”的可能性，并提高了DIET工艺的性能。该结果将为通过电压提高厌氧处理效率提供理论支持。