臭氧陶瓷膜工艺处理微污染原水效果与膜污染研究

Study on Micro-polluted Water Treatment by Ozone/Ceramic Membrane and Membrane Fouling

采用臭氧陶瓷膜组合工艺处理微污染原水,对比3种不同截留分子量陶瓷膜对组合工艺去除污染物的影响。研究结果表明,与单独过滤比较,截留分子量为15 k、50 k、150 k的陶瓷膜经过1~4 mg/L臭氧的预处理后膜通量分别提升1.2%~2.6%、6.0%~10.5%、4.2%~8.4%,臭氧对50 k陶瓷膜影响最大,臭氧最佳投加量为2 mg/L。在2mg/L最优臭氧投加量下,15 k、50 k、150 k的陶瓷膜对COD的最大去除率分别为29.2%、24.7%、19.5%,对UV254的最大去除率分别为40.0%、36.7%、41.3%。经过三维荧光分析,富里酸类物质是膜污染的主要物质,陶瓷膜主要截留亲水性有机物(HPI),不同组分有机物对不可逆膜污染的贡献顺序为亲水性有机物(HPI)>强疏水性有机物(HPO)>弱疏水性有机物(TPI)。

An integrated process ofpre-ozonationand ceramic UF membrane filtration was applied to treat micro-polluted water. The influence of three ceramic membranes with different molecular weight cut-offs （MWCO） on the hybrid process were investigated. Research results showed that, compared with membrane filtration alone, the membrane flux of 15 k, 50 k, 150 k ceramic membrane was improved by 1.2%-2.6%, 6.0%-10.5% and 4.2%- 8.4%, respectively after ozone pretreatment. Ozone had the biggest influence on 50 k aceramic membrane, and the best optimization dosage of ozone was 2 mg/L. When ozone dosage was 2 mg/L, the removal rate of COD^by 15 k, 50 k and 150 k was 29.2%, 24.7% and 19.5% respectively, and removal rate of UV2s4was 40.0%, 36.7% and 41.3%, respectively. Through the analysis of three-dimensional fluorescence, Fulvic acid-like components was the main pollutant of membrane fouling, and thecontribution order of organic matter with different component for irreversible fouling potential was HPI〉HPO〉TPI.