title: [Study on the combination of preozonation and post-ozonation-BAC process for drinking water treatment].
abstract: This study was conducted to illustrate the effectiveness of preozonation or O3-BAC or combination of these two process in controlling DBPs for treating a dam source water in South China through SBR and continuous flow (200 L/h) experiments and the variables in the treatment train included the point of preozonation with respect to coagulation; the point of ozonation with respect to BAC, the ozone dosage required for preozonation and the Br- content of raw water. Results indicated the reduction in DBP formation potential closely paralleled the reduction in UV absorbance, and trihalomethane and haloacetic acid formation potential can be removed under a dose of preozone at 0.5 - 1.0 mg/L, at the same time, ozone by-products (bromate and formaldehyde) can be controlled in low level. The continuous flow experiment results show that combination of preozonation and O3-BAC process has obviously positive effects on the removals of particles with a size above 2 microm, COD(Mn), and TOC. However, DBPs formation can be controlled by the removal of organic matters.
authors.affiliation: State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
authors.forename: Zhao-hai
authors.initials: ZH
authors.lastname: Guo
authors.forename: Min
authors.initials: M
authors.lastname: Yang
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhang
authors.forename: Yi-shan
authors.initials: YS
authors.lastname: Pei
authors.forename: Jun-zhi
authors.initials: JZ
authors.lastname: Zhang
authors.forename: Juni
authors.initials: J
authors.lastname: Hirotsuji
mesh_terms: D002606:Charcoal / Q000737:chemistry; D017606:Chlorine Compounds / Q000032:analysis*; D004202:Disinfectants / Q000009:adverse effects*; D010126:Ozone / Q000737:chemistry; D018508:Water Purification / Q000379:methods*; D014881:Water Supply / Q000032:analysis*
chemical_list: D017606:Chlorine Compounds; D004202:Disinfectants; D002606:Charcoal; D010126:Ozone