印染生化尾水反渗透深度处理工艺膜污染成因分析  

Analysis of membrane fouling causes in RO process for advanced treatment of dyeing secondary effluent

作　　者：李丽[1] 杨成[1] 龙超[1] 

机构地区：[1]污染控制与资源化研究国家重点实验室,南京大学环境学院,南京210023

出　　处：《环境工程学报》2014年第1期77-81,共5页Chinese Journal of Environmental Engineering

基　　金：国家"水体污染控制与治理"科技重大专项(2012ZX07101003);教育部新世纪优秀人才支持计划项目(NCET-11-0230)

摘　　要：为阐明印染生化尾水反渗透膜处理时膜污染的成因,使用小试装置进行40 h膜污染实验,研究膜污染速率、污染程度以及可逆性,同时应用扫描电子显微镜-EDS能谱仪、傅里叶变换红外光谱仪、电感耦合等离子发射光谱仪、总有机碳测定仪等仪器对进水水质、膜表面污染物的形态和组成等进行表征。结果表明,膜表面主要是碳酸钙无机污染和钙与有机物络合污染,无机污染占主导,且可逆性差,有机污染物主要含有—OH和—CC官能团;单一去除废水中有机物污染物(TOC去除率达88%)对膜污染缓解不明显,但钙离子的去除可显著缓解膜污染,膜通量可增加72.6%;同时去除有机物和钙离子,膜通量可增加80.4%。In this study, fouling behaviors （the rate, extent of flux decline and fouling reversibibty） ot a bench-scale cross-flow RO membrane fed with dyeing secondary effluent were studied under fixed operational conditions. Feed water quality and membrane layer characteristics were investigated using SEM-EDS, AFR-FT- IR, ICP-AES, and TOC analysis methods, respectively. The results showed that inorganic precipitation of calci- um carbonate together with organic fouling were primarily responsible for the irreversible flux loss. DOC removal of 88% did not reduce obviously membrane fouling. However, removal of calcium ion could increase membrane flux by 72.6% ; the flux increased by 80.4% when DOC was further removed.

关 键 词：印染废水 反渗透 膜污染 预处理 

分 类 号：X703.1[环境科学与工程—环境工程]