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.
出处
《环境科学与技术》
CAS
CSCD
北大核心
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)
关键词
SMP
MBR
累积
脱氢酶活性
soluble microbial products(SMP)
membrane bioreactor(MBR)
accumulation
dehydrogenase activity
