不同酶强化污泥为燃料微生物燃料电池特性对比分析

采用单室无膜悬浮阴极微生物燃料电池(MFC),对比分析了蛋白酶和淀粉酶强化剩余污泥为燃料的MFC(ESMFC)产电特性、酶特性和污泥减量化效果。研究表明,投加蛋白酶的ESMFC最大功率密度比对照组增加106.2%,投加淀粉酶时ESMFC最大功率密度比对照组增加48%。蛋白酶作用主要体现在投加后的前12小时,而淀粉酶作用时间则较长,为投加后的前144小时,但在运行前期,由于高温作用,导致系统内的酶活性较强,投加的淀粉酶作用则不明显。投加蛋白酶的系统内TCOD、TSS和VSS去除率分别为82%、65%和85%,而投加淀粉酶的系统内TCOD、TSS和VSS去除率分别达到86%、67%和88%。此研究对于ESMFC中外加酶的选择具有一定意义。

Comparison on microbial fuel cell using sludge enhanced by different enzyme

A single-chamber,membrane-less and floating-cathode microbial fuel cell (MFC) was established in this study.Electrogenesis characteristic,enzyme properties and sludge reduction in MFC using surplus sludge (SMFC) treated by amylase and protease were studied.Compared to the MFC using surplus sludge with deactivation enzyme,the maximum power density in SMFC with protease and amylase increased by 106.2% and 48%,respectively.Protease function mainly reflected the first 12 h after dosing,and amylase effect time was longer,for the first 144 h after dosing.But in the early stage of the operation,amylase function was not obvious due to the high temperature that resulted in the stronger enzyme activity in MFC.The removal efficiencies of TCOD,TSS and VSS in SMFC treated by protease were 82%,65% and 85%,respectively.And the removal efficiencies of TCOD,TSS and VSS in SMFC treated by amylase were 82%,65% and 85%,respectively.This study result may have important guidance to the choice of enzyme in ESMFC.