两级过滤AnMBR反应器的运行效能和污染特性  

The operational efficiency and pollution characteristics of a two-stage filtration AnMBR reactor

作　　者：夏智恒 李英豪 姜昭[1] 贾梦飞 王洪臣[1] 齐鲁[1] 刘国华[1] XIA Zhi-heng;LI Ying-hao;JIANG Zhao;JIA Meng-fei;WANG Hong-chen;QI Lu;LIU Guo-hua(School of Chemistry and Life Resource,Renmin University of China,Beijing 100872,China)

机构地区：[1]中国人民大学化学与生命资源学院,北京100872

出　　处：《中国环境科学》2024年第11期6139-6147,共9页China Environmental Science

基　　金：水体污染控制与治理科技重大专项(2017ZX07102-003)。

摘　　要：构建以高分子滤布及附着在其表面动态膜作为反应器的一级过滤系统及聚偏氟乙烯(PVDF)超滤膜的二级过滤系统组成的两级过滤式An MBR(F-An MBR),探究其在低浓度市政污水处理中的应用效果.结果表明,亲水性较好的聚酰胺滤布,80μm滤布在12LMH运行通量下有效拦截污泥,动态膜形成后TSS拦截率超过88%,适于F-An MBR.一级过滤显著提高了An MBR的抗污染性,PVDF超滤膜的临界通量从6LMH提升至12LMH,膜污染速率及跨膜压差的增长速率明显下降.分析显示,动态膜组件降低了膜池中50%以上的MLSS、MLVSS和EPS等膜污染物质,有效延缓超滤膜滤饼层污染的形成.然而,动态膜组件对SMP的拦截相对较弱,溶解性蛋白质含量仅减少19.34%,限制了对凝胶层污染的改善.A two-stage filtration AnMBR(F-AnMBR)system was constructed,consisting of a primary filter with polymer filter cloth and a dynamic membrane formed on its surface,along with a secondary filter system utilizing polyvinylidene fluoride(PVDF)ultrafiltration membranes.This system was designed to evaluate its effectiveness in treating low-concentration municipal wastewater.Hydrophilic polyamide filter cloth was selected,featuring an 80μm mesh that effectively intercepts sludge at a flux of 12LMH.Following the formation of the dynamic membrane,the total suspended solids(TSS)interception rate exceeded 88%,indicating its suitability for F-AnMBR applications.The primary filtration significantly enhanced the anti-fouling properties of the AnMBR,with the critical flux of the PVDF ultrafiltration membrane increasing from 6LMH to 12LMH.This improvement was accompanied by a notable reduction in the rate of membrane fouling and an increase in the transmembrane pressure difference.Analyses revealed that the dynamic membrane component reduced membrane fouling substances,such as mixed liquor suspended solids(MLSS),mixed liquor volatile suspended solids(MLVSS),and extracellular polymeric substances(EPS)in the membrane pool by over 50%,effectively delaying the formation of the ultrafiltration membrane cake layer contamination.However,the dynamic membrane's ability to intercept soluble microbial products(SMP)was relatively limited,achieving only a 19.34%reduction in soluble protein content,which constrained the overall improvement of gel layer contamination.

关 键 词：厌氧膜生物器 市政污水 膜污染 高分子滤布 动态膜 

分 类 号：X703.1[环境科学与工程—环境工程]