化学预氧化/混凝沉淀工艺对三氯乙醛生成潜能的去除  

Removal of Chloral Hydrate Formation Potential by Chemical Pre-oxidation/ Coagulation Sedimentation Process

作　　者：蔡广强[1] 刘丽君[1] 傅学敏[2] 卢小艳[1] 李悦[1] 张金松[1,2] 

机构地区：[1]深圳市水务<集团>有限公司,广东深圳518031 [2]哈尔滨工业大学深圳研究生院,广东深圳518055

出　　处：《中国给水排水》2015年第19期8-12,共5页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2015ZX07406-004)

摘　　要：以南方某微污染水源水为研究对象,分析了不同化学预氧化/混凝沉淀工艺对三氯乙醛生成潜能(CHFP)的去除作用,以找出合适的化学预氧化方式及其最佳投加量,为三氯乙醛(CH)的控制提供指导。结果表明,与混凝沉淀工艺联用,能够有效去除CHFP的化学预氧化药剂有:KMnO_4、ClO_2、H_2O_2和O_3,其最佳投量分别为0.4、0.5、3和0.5 mg/L,对CHFP的去除率分别为78.73%、75.59%、77.82%和74.83%;ClO_2和O_3预氧化在较大的投加量条件下,经混凝沉淀后CHFP增加,而KMnO_4和H_2O_2预氧化在较大投加量条件下,经混凝沉淀后对CHFP的去除作用明显;臭氧/过氧化氢(O_3/H_2O_2)预氧化使CHFP增加,不适用于常规工艺中对CH的控制。The removal of chloral hydrate formation potential （CHFP） by different chemical pre-oxidation/coagulation sedimentation processes was studied for a micro-polluted source water in the south of China. Suitable pre-oxidants and the corresponding optimum doses were determined to provide guid-ance for controlling CH during drinking water treatment. The results indicated that the pre-oxidants that could effectively remove CHFP by combining with coagulation sedimentation process were potassium per- manganate （ KMnO4 ） , chlorine dioxide （ClO2 ）, hydrogen peroxide （ H2O2 ） and ozone （ 03 ）. The cor- responding optimum doses were 0.4 mg/L, 0.5 rag/L, 3 mg/L and 0. 5 mg/L, respectively, and the re- moval rates of CHFP were 78＇ 73%, 75.59%, 77.82% and 74.83%, respectively. Under the condition that the doses were large, pre-oxidation with ClO2 and O3 both could increase CHFP in the effluent of coagulation sedimentation process, but pre-oxidation with KMnO4 and H2O2 were the opposite. In addition, pre-oxidation with O3/H2O2 was not suitable for controlling CH formation in the conventional treatment process because it could increase CHFP.

关 键 词：微污染水源水 化学预氧化 混凝沉淀 三氯乙醛生成潜能 

分 类 号：TU991.2[建筑科学—市政工程]