MFC强化同步短程硝化反硝化工艺的启动  

Enhanced start-up of simultaneous short-cut nitrification and denitrification with microbial fuel cell

作　　者：贾璐维 赵剑强[1] 胡博[1] 赵慧敏[1] 黄楠[1] 

机构地区：[1]长安大学环境科学与工程学院,西安710064

出　　处：《环境工程学报》2015年第4期1831-1836,共6页Chinese Journal of Environmental Engineering

基　　金：中央高校基金创新团队培养项目(2013G3292017)

摘　　要：微生物燃料电池(MFC)可在阴极实现反硝化、短程反硝化和同步硝化反硝化并产生电能,但在MFC阴极实现同步短程硝化反硝化的研究尚未见到报道。为了探讨MFC阴极同步短程硝化反硝化工艺的性能,将双室曝气阴极MFC与A/O脱氮工艺结合处理人工模拟低碳氮比废水。通过静置运行15 d使得MFC阴极室亚硝态氮得以积累,氨氧化菌得以富集。随即改为连续运行后第21天成功启动同步短程硝化反硝化MFC;阴极出水氨氮浓度为0.3 mg/L,亚硝态氮浓度为15.9 mg/L,硝态氮浓度为0.6 mg/L,亚硝化率达到95%以上,阴极电极自养反硝化去除率达到50%以上,COD去除率达到85%以上。结果表明,将MFC与同步短程硝化反硝化工艺结合,通过阴极室中氧气得电子获得高p H,可以强化同步短程硝化反硝化工艺,完成生物脱氮的同时回收电能,并具有减少外加碱度的优势。Microbial fuel cell( MFC) can achieve denitrification,short-cut denitrification and simultaneous nitrification and denitrification in the cathode,meanwhile,generate electricity. However,to date,simultaneous short-cut nitrification and denitrification process in the cathode of MFC has not been reported. In order to study the performances of simultaneous short-cut nitrification and denitrification process in the cathode of MFC,a dualchamber aeration bio-cathode MFC was combined with the A / O biological nitrogen removal process to treat synthetic low C / N ratio wastewater. When nitrite accumulation and ammonia-oxidizing bacterial enrichment were achieved in the cathode of the MFC after a one-time feeding cultivation for 15 days,the reactor was converted to a continuous operation mode. 21 days later,the simultaneous short-cut nitrification and denitrification was successfully accomplished in the cathode of the MFC. The concentrations of ammonia,nitrite and nitrate of the cathode effluent were 0. 3mg / L,15. 9 mg / L and 0. 6 mg / L,respectively. The conversion rate of ammonia to nitrite was higher than 95%,and more than 50% nitrogen was removed by autotrophic denitrification. The removal efficiency of COD was higher than 85%. Combining the simultaneous short-cut nitrification and denitrification process with MFC,oxygen obtained the electrons in the aerobic cathode and a high p H value environment can be created,consequently,nitrogen removal and electric energy recovery can be achieved at the same time. The simultaneous short-cut nitrification and denitrification process can be strengthened and the need of the external alkalinity can be reduced.

关 键 词：微生物燃料电池 同步短程硝化反硝化 A/O生物脱氮工艺 生物阴极 

分 类 号：X703.1[环境科学与工程—环境工程]