南水北调工程丹江口水库原水预氧化对常规工艺和消毒副产物的影响  

Effect of Raw Water Preoxidation on Conventional Water Treatment Process and DBPs for Danjiangkou Reservoir of South-North Water Diversion Project

作　　者：张静 张晓岚 温颖 徐学良 邹放 李玉仙 顾军农 ZHANG Jing;ZHANG Xiaolan;WEN Ying;XU Xueliang;ZOU Fang;LI Yuxian;GU Junnong(Beijing Engineering Research Center for Drinking Water Quality,Technology Institute of Beijing Waterworks Group Co.,Ltd.,Beijing 100012,China)

机构地区：[1]北京市自来水集团有限责任公司技术研究院,北京市供水水质工程技术研究中心,北京100012

出　　处：《净水技术》2020年第10期116-124,共9页Water Purification Technology

基　　金：水体污染控制与治理科技重大专项(2017ZX07108002)。

摘　　要：在南水北调中线工程丹江口水库作为原水的条件下开展中试试验,对比研究不同NaClO浓度和臭氧浓度下,预氯化和预臭氧化对藻类去除的影响、对混凝沉淀和砂滤工艺单元以及消毒副产物生成的影响。结果表明:在预氯化工艺中,混凝沉淀对藻类去除起到了主导作用;在预臭氧化工艺中,臭氧对藻类的破坏作用在藻类去除中占主导地位,预氯化工艺的除藻效率略高;预臭氧化对藻细胞破坏作用更强,导致水中溶解性有机物浓度升高,同时降低了混凝沉淀的除藻效率,导致出水中DOC浓度高于预氯化工艺;预氯化工艺中,消毒副产物以C-DBPs为主;预臭氧化工艺中,C-DBPs浓度低于预氯化工艺,但N-DBPs的种类和浓度均高于预氯化工艺。Danjiangkou Reservoir as raw water of Middle Route of South-North Water Diversion Project was used to explore algae removal,performance of sedimentation tank and sand filter,and disinfection by-products(DBPs)under preoxidation by different concentration of NaClO and O3 in pilot experiment.Results showed that in prechlorination process,coagulation precipitation dominantly contributed to a little higher algae removal efficiency,and oxidation of ozone played a leading role in preozonation process.Higher dissolved organic carbon(DOC)concentration in the effluent was detected in preozonation process partly owing to the destruction of algae cell,and partly because of the weakened performance of coagulation sedimentation.Instead of nitrogenated DBPs(N-DBPs)in preozonation process,carbonated DBPs(C-DBPs)were the dominant DBPs in prechlorination process.Also,it was noteworthy that preozonation leaded to higher and more various N-DBPs and lower C-DBPs than that in prechlorination process.

关 键 词：南水北调工程 预氯化 预臭氧化 藻类 消毒副产物 

分 类 号：TU991.2[建筑科学—市政工程]