臭氧陶瓷膜工艺处理微污染原水效果与膜污染研究
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摘要
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 of pre-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 was2 mg/L. When ozone dosage was 2 mg/L, the removal rate of CODMnby 15 k, 50 k and 150 k was 29.2%, 24.7% and 19.5% respectively, and removal rate of UV254 was 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.
An integrated process of pre-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 was2 mg/L. When ozone dosage was 2 mg/L, the removal rate of CODMnby 15 k, 50 k and 150 k was 29.2%, 24.7% and 19.5% respectively, and removal rate of UV254 was 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.
引文
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[2]TIAN J Y,ERNST M,CUI F,et al.Correlations of relevant membrane foulants with UF membrane fouling in different waters[J].Water Research,2013,47(3):1218-1228.
[3]赵梦,周丽,蔡宙,等.陶瓷膜及其组合工艺在饮用水处理中的研究进展[J].给水排水,2016(07):133-140.
[4]KARNIK B S,DAVIES S H R,CHEN K C,et al.Effects of ozonation on the permeate flux of nanocrystalline ceramic membranes[J].Water Research,2005,39(4):728-734.
[5]KIM J,DAVIES S H R,BAUMANN M J,et al.Effect of ozone dosage and hydrodynamic conditions on the permeate flux in a hybrid ozonation-ceramic ultrafiltration system treating natural waters[J].Journal of Membrane Science,2008,311(1-2):165-172.
[6]FATIMAH I,SAHRONI I,PUTRA H P,et al.Ceramic membrane based on Ti O2-modified kaolinite as a low cost material for water filtration[J].Applied Clay Science,2015,118(C):207-211.
[7]CHEN W,WESTERHOFF P,LEENHEER J A,et al.Fluorescence excitation-emission matrix regional integration to quantify spectra for dissolved organic matter[J].Environmental Science&Technology,2003,37(24):5701-5710.
[8]JERMANN D,PRONK W,MEYLAN S,et al.Interplay of different NOM fouling mechanisms during ultrafiltration for drinking water production[J].Water Research,2007,41(8):1713-1722.
[9]HARMAN B I,KOSEOGLU H,YIGIT N O,et al.The use of iron oxide-coated ceramic membranes in removing natural organic matter and phenol from waters[J].Desalination,2010,261(1):27-33.
[10]ZHANG X,GUO J,WANG L,et al.In situ ozonation to control ceramic membrane fouling in drinking water treatment[J].Desalination,2013,328:1-7.