MBR中SMP的累积及其对反应器运行的影响  

Accumulation of Soluble Microbial Products in Membrane Bioreactor and Its Influence to Bioreactor Operation

作　　者：李莹[1,2] 田林[3] 张宏伟[4] 王捷[5] 贾辉[5] 

机构地区：[1]天津天保控股有限公司博士后工作站,天津300308 [2]天津大学环境科学与工程学院博士后流动站,天津300072 [3]天津天保市政有限公司,天津300308 [4]天津大学环境科学与工程学院,天津300072 [5]天津工业大学环境与化学工程学院,天津300160

出　　处：《环境科学与技术》2010年第S2期237-240,共4页Environmental Science & Technology

基　　金：天津市科技创新专项资金项目"多水源开发与循环利用成套技术示范工程"(06FZZDSH00900);国家自然科学青年基金(50908161)

摘　　要：研究了膜生物反应器(MBR)中溶解性微生物产物(SMP)的累积及其对反应器运行的影响。试验结果表明:在MBR稳定运行的情况下,多糖是SMP的主要成分。而且,MBR内的SMP浓度高于普通活性污泥处理工艺(CAS),这是源于MBR中微滤膜对于部分分子量较大污泥EPS的截留作用。MBR中SMP的积累会对污泥的MLVSS/MLSS和脱氢酶活性产生不利影响,抑制生物代谢活性。稳定情况下,蛋白质和多糖的含量总和分别约占出水和混合液上清液TOC的95%和64%,由此可知SMP是出水和混合液上清液中污染物中的重要组成部分。Accumulation of SMP in the membrane bioreactor(MBR) and its influence to bioreactor operation were studied.The result showed that the predominant constituent of SMP was carbonhydrate in the bioreactor during steady state.Furthermore,compared to the conventional activated sludge process(CAS),concentrations of SMP were higher in the MBR due to efficient interception performance of the membrane.It was found that the accumulation of SMP in the MBR had adverse effect on sludge MLVSS/MLSS value and dehydrogenase activity,and microbial metabolism activity was restrained.During steady state,the concentration of protein and carbonhydrate in the effluent and mixture supernatant respectively contributed to 95% and 64% of the TOC.SMP were main pollutants of mixture supernatant and effluent in the MBR.

关 键 词：SMP MBR 累积 脱氢酶活性 

分 类 号：X703.3[环境科学与工程—环境工程]