污泥厌氧发酵-硫酸盐还原菌耦合体系产电性能和处理酸性矿井水的研究  

A treatment study of acid mine wastewater and the performance of electricity generation by coupling system using sludge anaerobic fermentation-sulfate reducing bacteria

作　　者：蔡昌凤[1] 罗亚楠[1] 张亚飞[1] 黄志[1] 

机构地区：[1]安徽工程大学生物与化学工程学院,安徽芜湖241000

出　　处：《煤炭学报》2013年第A02期453-459,共7页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(51274001);煤炭资源与安全开采国家重点实验室开放课题资助项目(SKLCRSM10KFA05)

摘　　要：为原位治理高硫煤矿区酸性矿井水,建立微生物燃料电池污泥厌氧发酵-硫酸盐还原菌耦合体系,考察了电极类型、阳极面积、极间距、离子浓度对产电性能和处理酸性矿井水中的硫酸盐效果的影响。单因素试验结果表明,碳布为阳极、极间距适中(3 cm)时,产电最佳;阳极面积越小、NaCl浓度越高,功率密度越大;硫酸根去除率的最佳条件为:碳布为阳极、极间距为5 cm、离子浓度适中,阳极面积越大,对硫酸根去除率越高。以硫酸盐去除最佳条件构建单室无膜碳片为阳极的耦合产电体系,所产生的最大功率密度为2.093 3 mW/m2,10 d后污泥的COD去除率为43%,废水SO2-4的平均去除速率达194.4 mg/(L·d-1),最高去除率为64%,比开路时的SO2-4去除率提高24%。污泥厌氧发酵-硫酸盐还原菌耦合产电体系可同时实现降解剩余污泥和处理含SO2-4废水。Abstract：In order to treat in-situ acid mine water from high sulphur coal mining area, a coupling system using microbial fuel cell sludge anaerobic fermentation and sulfate reducing bacteria was proposed to investigate the effects of sulfate treatment and the performance of electricity generation under the conditions of different types of electrode, anode area, pole spacing, and ion concentration. The results from a single factor experiment show that the optimal performance of electricity generation is achieved with anode of carbon cloth and moderate inter-electrode distance （3 cm） , and the power density increases with the increase in NaC1 concentration and the decrease in anode area. However, the optimal conditions for sulfate removal rate are as follows：carbon cloth is anode, inter-electrode distance is 5 cm. The larger anode area achieves a higher sulfate removal rate with a moderate ion concentration. For the constructed single room without membrane carbon piece as the anode coupling system with the optimal sulfate removal, the maximum power density of 2. 093 3 mW/m2, the sludge COD removal of 43% after 10 days, the average sulfate removal rate of 194.4 mg/（ L ~ d） were attained respectively. The highest sulfate removal rate is 64.3% ,which increase 24% com- paring with the open circuit. The coupled electro-genesis system using sludge anaerobic fermentation-sulfate can achieve synchronous degradation residual sludge and treat SO24- wastewater. Key words： microbial fuel cell ; sulfate reducing bacteria; sludge ; coupling system ; acid mine water; electricity generation

关 键 词：微生物燃料电池 硫酸盐还原菌 污泥 耦合体系 酸性矿井水 产电性能 

分 类 号：X703[环境科学与工程—环境工程] X172