黄姜废水微生物燃料电池产电去污性能研究

Electricity Generation and Contaminants Degradation Performances of a Microbial Fuel Cell Fed with Dioscorea zingiberensis Wastewater

以H型反应器研究了微生物燃料电池(MFC)利用黄姜废水产电的效果,并结合产电周期中阳极液氧化峰电位、COD、pH值等物化指标及进出水IR、GC-MS谱图变化讨论了MFC对黄姜废水污染物的去除特性.黄姜废水MFC内阻约480Ω,最大功率密度可达118.1 mW/m2,外接1 000Ω电阻时,5 mL黄姜废水所含有机物可维持产电约133 h,输出电压为0.4 V,库仑效率约3.93%.MFC对黄姜废水中污染物具有良好的去除效果,产电周期结束时,COD去除率可达90.1%,NH 4+-N去除率可达66.8%左右;呋喃类、部分酚类及其它一些复杂有机污染物在产电过程中可被降解利用,出水残留物质为一些难降解的长链脂肪酸、酯、醚类以及含苯环结构的酯类和环烷、烯烃等.

The electricity generation performance of a microbial fuel cell （MFC） utilizing Dioscorea zingiberensis wastewater was studied with an H-shape reactor. Indexes including pH, conductivity, oxidation peak potential and chemical oxygen demand （COD） of the anolyte were monitored to investigate the contaminants degradation performance of the MFC during the electricity generation process, besides, contaminant ingredients in anodic influent and effluent were analyzed by GC-MS and IR spectra as well. The maximum power density of the MFC could achieve 118.1 mW/m^2 and the internal resistance was about 480 12. Connected with a 1 000 12 external resistance, the output potential was about 0. 4 V. Fed with 5 mL Dioscorea zingiberensis wastewater, the electricity generation lasted about 133 h and the coulombic efficiency was about 3.93%. At the end of electricity generation cycle, COD decreased by 90. 1% while NH4 -N decreased by 66.8%. Furfural compounds, phenols and some other complicated organics could be decomposed and utilized in the electricity generation process, and the residual contaminants in effluent included some long-chain fatty acids, esters, ethers, and esters with benzene ring, cyeloalkanes, cyeloolefins, etc. The results indicate that MFC, which can degrade and utilize the organic contaminants in Dioscorea zingiberensis wastewater simultaneously, provides a new approach for resource recovery treatment of Dioscorea zinglberensis wastewater.