复合式MBR启动阶段的特性研究  

Start-up Characteristics of Hybrid MBR

作　　者：唐嘉陵[1] 王晓昌[1] 夏四清[1,2] 

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西西安710055 [2]同济大学环境科学与工程学院,上海200092

出　　处：《中国给水排水》2013年第21期24-27,32,共5页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2013ZX07310);陕西省"百人计划"项目

摘　　要：MBR作为污水再生回用的关键技术,已经得到广泛的研究和应用。然而现有研究主要着眼于稳定运行的情况,而很少关注启动阶段MBR的主要特征。基于对复合式MBR反应器启动阶段的分析,发现在整个启动期间MBR对COD的去除效果都十分稳定,其中启动前期主要通过膜截留作用,其贡献率可达40%,而在启动后期主要依靠生物作用。对氨氮的去除率在4 d内便可以达到95%以上,对总氮的去除率随着时间逐渐升高,30 d后可达55%左右。通过原子力显微镜观察,启动30 d后膜丝出现严重的污染现象。而EPS含量,特别是SEPS中蛋白质含量的增加是导致膜污染的主要原因。As a key technology for water reuse, MBR has been studied and applied widely. However, current research mainly focuses on the characteristics of the stable operation instead of MBR start- up stage. The characteristics of a hybrid MBR （HMBR） during the start-up stage were analyzed. The results showed that HMBR had a stable COD removal in the whole start-up stage. Membrane rejection played a major role in the initial stage with a contribution rate of 40% , and COD removal was achieved by biodegradation in the later stage. The removal rate of NH^＋_4 - N was 95% within 4 d, and the removal rate of TN was 55% after 30 d. AFM analysis revealed that serious membrane fouling occurred after 30-d operation. Increase in EPS, especially in proteins in SEPS was the major cause of membrane fouling.

关 键 词：复合式MBR 启动阶段 胞外聚合物 

分 类 号：X703[环境科学与工程—环境工程]