电化学生物膜反硝化磁场促进效应  

Magnetic Field Enhancement of Nitrogen Removal by Bioelectrochemical Process

作　　者：封志飞 赵国智[2] 李文红[2] 田光明[2] 

机构地区：[1]北京国电清新环保技术股份有限公司,北京100042 [2]浙江大学环境与资源学院,浙江杭州310029

出　　处：《环境科学研究》2012年第1期63-69,共7页Research of Environmental Sciences

基　　金：杭州市科技发展计划项目(20061133B29);国家水体污染控制与治理科技重大专项(2008ZX07317-008)

摘　　要：针对BER(电化学生物膜反应器)的传质问题,设计了MBER(磁场-电化学生物膜反应器).通过对不同电流强度下BER和MBER中NO3--N,NO2--N,NH4+-N和TN去除或产生情况的对比,以及不同电流强度下电流利用效率的分析发现,在HRT为10 h,温度为25℃,进水pH为7.8,进水ρ(NO3--N)为30 mgL的运行条件下,MBER对NO3--N的去除率高出BER13%～38%,MBER对TN的去除率高出BER 10%～30%.且MBER在电流强度为70 mA时就达到最高去除率,而BER则需要电流强度为80 mA时才能达到最高去除率.试验证明磁场的存在促进了BER反硝化,提高了电流利用效率,使得MBER可以在较低电流强度下达到优于BER的脱氮效果.To resolve the problem of mass transfer in the Biofilm Electrode Reactor（BER）,a Magnetic Biofilm Electrode Reactor（MBER） was constructed by adding a magnetic field around the BER.The results showed that,at HRT=10 hours,T=25 ℃,pH=7.8 and nitrate influent concentration=30 mgL,the removal efficiency of nitrate and TN was increased by 13%-38% and 10%-30%,respectively,by MBER compared to BER.The maximum nitrate reduction rate was achieved at 70 mA by MBER,but at 80 mA by BER.The results indicated that the existence of a magnetic field promoted the nitrate reduction rate,improved the current efficiency and resulted in better performance of nitrate removal at lower current intensity than that by BER.

关 键 词：电化学 生物膜 反硝化 磁场 硝酸盐 

分 类 号：X703[环境科学与工程—环境工程]