SMP与EPS分子质量分布对污泥可滤性的影响  

Influence of Molecular Weight Distribution of SMP and EPS on Sludge Filterability

作　　者：闫立娜[1] 王朝朝[2] 李思敏[2] 唐锋兵[2] 张凯[2] 李军[3] 

机构地区：[1]河北工程大学研究部,河北邯郸056038 [2]河北工程大学城市建设学院,河北邯郸056038 [3]北京工业大学建筑工程学院,北京100124

出　　处：《中国给水排水》2016年第17期17-22,共6页China Water & Wastewater

基　　金：河北省高等学校科学研究项目(QN2015115);河北省自然科学基金资助项目(E2016402017)

摘　　要：采用脱氮除磷膜生物反应器(UCT-MBR)工艺处理冀南地区市政污水,考察了不同污泥龄(SRT)条件下(SRT由10 d增加至45 d)膜池污泥溶解性微生物产物(SMP)与胞外聚合物(EPS)的分子质量(MW)分布特性对污泥可滤性的影响,并采用SPSS软件对SMP、EPS的不同分子质量组分与污泥可滤性的相关性进行了深入分析。结果表明:SMP、EPS的糖类与蛋白类组分呈双峰式分布,以MW<1 ku与>100 ku的为主,并且随着SRT的延长呈增加的趋势;SPSS相关性及偏相关分析结果显示,SMP中MW>100 ku的糖类组分(SMPc>100 ku)浓度对总修正污染指数(TMFI)的影响最大,且呈现良好的线性正相关性,可将其作为污泥可滤性的指示因子;同时SMP中MW<1 ku的糖类组分(SMP_(c<1 ku))浓度、EPS中MW>100 ku的糖类组分(EPS_(c>100 ku))浓度分别对MFI_(sol)、MFI_(ss)的影响最大,可以分别作为两者的指示因子。A University of Cape Town Membrane Bioreactor （UCT-MBR） process was used to treat municipal wastewater in southern part of Hebei Province, and the influence of molecular weight dis- tribution characteristics of soluble microbial products （SMP） and extracellular polymeric substances （EPS） on the sludge filterability under different SRT from 10 d to 45 d was investigated. In the mean- while, SPSS was utilized to analyze the correlations between molecular weight distribution of SMP and EPS and sludge filterability. The results showed that bimodal distribution of the carbohydrates and pro- teins of SMP and EPS were exhibited, and mainly in the form of 〈 1 ku and 〉 100 ku, which showed an increasing trend with SRT prolonged. The analysis results from SPSS correlation and partial correlation suggested that SMPc 〉100 ku concentration exerted the greatest impact on TMFI, and showed a good positivelinear correlation, which proved that SMPc〉10Oku could be used as the sludge filterability indicator. SMPc 〈 1 ku concentration and EPSo 〉 100 ku concentration had the greatest effects on MFIsol and MFIss, respec- tively, and both of them could be used as the corresponding indicators.

关 键 词：膜生物反应器 膜污染 修正污染指数 溶解性微生物产物 胞外聚合物 

分 类 号：X703[环境科学与工程—环境工程]