微生物燃料电池处理煤热解废水有机物降解特性  

Degradation Characteristics of Organic Compounds in Coal Pyrolysis Wastewater by Microbial Fuel Cell Treatment

作　　者：李明[1] 刘新民[1] 

机构地区：[1]青岛科技大学化工学院,山东青岛266042

出　　处：《水处理技术》2017年第11期57-61,共5页Technology of Water Treatment

基　　金：山东省科学技术发展计划项目资助(2010GGX10709)

摘　　要：以煤热解废水为研究对象,采用厌氧流化床微生物燃料电池(AFB-MFC)进行生化处理,考察了COD对系统产电及废水处理性能影响,并通过GC/MS内标法分析了反应体系中有机物组成及酚类物质的降解特性。结果表明,进水COD为952~2 238 mg/L时,输出电压及功率密度随COD增加而提高,最高分别为284.5 m V和2.13 m W/m^2,当COD为3 419 mg/L,输出电压和功率密度分别降低至245.7 m V和1.42 m W/m^2,说明过高的COD负荷会抑制微生物产电活性;COD去除率最高可达到92%,且随着进水COD的提高而有所下降。GC/MS结果表明,酚、苯、醇、杂环化合物与多环芳烃等物质充分降解,去除率分别为99.63%、97.55%、98.30%、95.75%和92.87%。准确分析了其中主要的5种酚类的质量浓度,该方法检出限为2.48~5.50μg/L,R^2大于0.993,平均加标回收率为72.6%~115.8%。Coal pyrolysis wastewater was treated by a new anaerobic fluidized bed microbial fuel cell, and the effects of COD concentrations on electricity generation and wastewater treatment performance were investigated, and the composition of organic compounds and degradation characteristic of phenols were analyzed by GC/MS internal standard method. The results showed that, when the COD concentration of influent was 952~2 238 mg/L, the output voltage and electricity generation was increased with the increase of COD loading rates, with the maximum output voltage of 284.5 mV and maximum power density of 2.13 mW/m^2. When the COD concentration of influent was 3 419 mg/L, the maximum output voltage and power density decreased to 245.7 mV and 1.42 mW/m^2 respectively. That indicated that high COD loading rates could inhibit microbial activity. The maximum COD removal rate could reach 92%, and would be decreased with the increase of influent concentration. According to GC/MS results, phenols, benzenes, alcohol, heterocyclic compound and polycyclic aromatic hydrocarbon were degraded fully, their removal efficiency were 99.63%, 97.55%, 98.30%, 97.5% and 92.87% respectively. The mass concentrations of main five phenol pollutants were measured accurately, the detection limits of phenol pollutants was 2.48~5.50μg/L, the linear correlation coefficient （R^2） was higher than 0.993 and the average recoveries values ranged from 72.6% to 115.8%.

关 键 词：微生物燃料电池 热解废水 GC/MS 生物降解 

分 类 号：X703.1[环境科学与工程—环境工程]