摘要
采用超滤法考察了太湖原水、各净水单元工艺出水中有机物分子量分布的变化特性。结果表明,太湖原水经预臭氧+曝气生物预处理工艺、常规处理工艺和臭氧-生物活性炭+超滤深度处理工艺后,总DOC去除率可以达到71.6%;臭氧预氧化+曝气生物滤池预处理工艺出水DOC变化不大,但分子量的分布变化较明显;常规的混凝沉淀工艺对分子量为0.5～1 kDa及>3kDa的有机物具有较好的去除效果;臭氧-生物活性炭深度处理工艺能有效去除分子量>0.5 kDa的有机物,臭氧和生物活性炭联用可以明显提高有机物的去除效果;各水处理单元对有机物的去除具有一定的互补性,可以达到安全优质供水的目的。
The variations of molecular weight and the distribution of organic matters from Taihu Lake raw water and effluent water in various units of purification processes after uhrafiltration treatment were investigated. The results showed that the total removal of DOC could reach 71.6% for Taihu Lake raw water after treatment by preozonation combining with bioiogical aerated pretreatment, conventional treatment and ozone activated carbon combining with ultrafiltration advanced treatment process. The DOC in effluent water after preozonation and biological aerated pretreatment did not change significantly, but the variations of molecular weight distribution were obvious. The conventional coagulation and sedimentation process had satisfied removal efficiency on the organic matters with molecular weight about 0.5 to 1 kDa and greater than 3 kDa. Ozonation plus biological activated carbon could effectively remove the organic matters with molecular weight greater than 0. 5 kDa, and the combination of ozone and biological activated carbon could obviously improve the removal efficiency of organic matters. Various purification process units had a certain complementarily for the treatment of organic matters, and safe and qualified water supply could be obtained.
出处
《供水技术》
2011年第6期6-9,共4页
Water Technology
关键词
分子量
有机物
净水工艺
预处理
深度处理
molecular weight （ MW ）
organic matters
water purification process
pretreatment
advanced treatment
