炼厂含油污水微生物燃料电池的启动及性能研究

Study on Start-Up and Performance of Microbial Fuel Cell with Refinery Wastewater as Fuel

炼厂含油污水蕴藏巨大化学能,利用微生物燃料电池技术处理含油污水可在水质净化的同时以电能的形式回收此能量。研究以炼厂含油污水为燃料构建并启动双室微生物燃料电池,考察电池产电特性及对含油污水的降解特性。结果表明:电池输出电压随阳极溶液浓度的增大而升高;电池开路电压为550.49 mV,最高输出功率密度262.8 mW m 3,内阻957,其中,欧姆内阻482,占总内阻的50.4%;对进水水质指标检测和GC-MS分析结果显示,电池对含油污水COD的降解达到81.8%,实验用含油污水有机组成主要为挥发酚、芳香烃和脂肪烃,其中挥发酚、芳香烃等特征污染物被优先吸附降解,并产生酸酯类、醇类等典型的厌氧代谢产物。

A great quantity of chemical energy is contained in refinery wastewater.When microbial fuel cell is used to treat this wastewater,the chemical energy could be recovered in electricity form simultaneously with water purification and the double pressure from energy shortage and environmental pollution can be relieved.In this paper,a two-chambered microbial fuel cell（MFC） with refinery wastewater as its fuel was constructed and started-up to study the characteristic of electricity production and oil pollutants degradation of MFC.Results indicate that the voltage output of MFC rises with the increase of anolyte concentration;the open circuit voltage of MFC is 550.49 mV,the maximum power density output is 262.8 mW.m.3,the total resistance of MFC is 957 Ω and the ohmic resistance is 482 Ω which consists of 50.4% of the total resistance.The general water quality testing and GC-MS analysis of the influx and effluent of MFC indicate that the degradation efficiency of COD in refinery wastewater reaches to 81.8%,main organic pollutants in refinery wastewater used in this paper are volatile phenols,arene and aliphatic hydrocarbon,and volatile phenols and arene are adsorbed and degraded firstly,and acid,ester and alcohol compounds are generated during anaerobic metabolic reaction.