影响AFB-MFC同步脱氮除硫性能因素的研究  

Factors Affecting Performance of AFB-MFC for Simultaneous Nitrogen and Sulfate Removal

作　　者：陈婷婷[1] 肖蓉蓉 施金豆[1] 杨平[1] 

机构地区：[1]四川大学建筑与环境学院,四川成都610065 [2]贵阳市南明区环境监测站,贵州贵阳550000

出　　处：《环境科学与技术》2013年第10期85-89,117,共6页Environmental Science & Technology

基　　金：国家科技支撑计划项目(2008BADC4B04)

摘　　要：厌氧流化床微生物燃料电池(AFB-MFC)用于处理含氮、硫的废水,其运行效能受到多种因素的影响,研究该反应器运行参数极为重要。利用人工配制的含氮、硫的有机废水作为原水,研究了AFB-MFC同步脱氮除硫产电性能影响因素。结果表明:随着有机物浓度的降低,NH4+-N、SO42-去除率下降,且变化趋势一致,有机物浓度低产电量减少;AFB-MFC对低碳硫废水(COD/SO42-)的耐受限值约为0.56,说明AFB-MFC对低碳硫比废水有很好的适应性;氨氮负荷的增加导致COD与氨氮的去除率下降,产电量下降,但SO42-的去除率仍稳定保持在80%以上;缩短水力停留时间(HRT)COD的去除率下降,SO42-的去除率大幅提高,而NH4+-N的去除效率出现先提高后下降的趋势。当HRT=12 h时,同步脱氮除硫的效果最好,NH4+-N和SO42-的最高去除率分别达到25.71%和93.07%。研究结果为该微生物燃料电池用于处理含硫氮废水的最佳操作条件提供了依据。Anaerobic fluidized bed microbial fuel cell （AFB-MFC） is used to treat wastewater containing nitrogen and sul- fate, and its operation performance is influenced by various factors, so the investigation of operating parameters has become an extremely important issue. Organic wastewater artificially mixed with nitrogen and sulfate was used as raw water to study the influencing factors of AFB-MFC for simultaneous nitrogen, sulfate removal and electricity generation. Results showed that with the reduction of influent organic matter concentration, removal rate of ammonia was reduced, sulfate almost followed the same trend, and low organic matter concentration produced less electricity. It was possible to treat low carbon to sulfate ratio wastewater in AFB-MFC reactor, even ratio was 0.56. With the increasing of ammonia load, removal rates of COD and am- monia nitrogen were reduced gradually, and electrical generation of the reactor declined, but SO42- removal rate was remain above 80%. When HRT was shortened, COD removal rate dropped significantly, SO42- removal rate was increasing steadily at the same time, and NH4＋-N removal efficiency increased in the initial, but dropped afterwards. When HRT was 12 h, high re- moval efficiencies were obtained in the system, with 25.71% ammonium removal and 93.07% sulfate removal. Results would provide a theoretical basis for treating sulfate and nitrogen-containing wastewater in MFC reactor.

关 键 词：厌氧流化床微生物燃料电池 脱氮 除硫 厌氧氨氧化 水力停留时间 

分 类 号：X703[环境科学与工程—环境工程]