自来水厂消毒工艺与微生物指标控制生产实践  

Practice on Disinfection Technology and Microbial Index Control in WTP

作　　者：虞力 YU Li(Shanghai Jiading Water Supply Co.,Ltd.,Shanghai 201899,China)

机构地区：[1]上海市嘉定自来水有限公司,上海201899

出　　处：《净水技术》2024年第S01期76-81,共6页Water Purification Technology

摘　　要：微生物指标是生活饮用水最重要的指标之一,保障自来水微生物安全始终是水厂首先要关注的。文章以长江水为水源、采用臭氧活性炭深度处理工艺的水厂为例,在不同的水温条件下,通过调整水厂的消毒工艺,重点是水厂沉淀和混凝阶段前加氯量、炭滤池滤后水后加氯量,对比了沉淀池出水、砂滤池出水、炭滤池出水、出厂水中总大肠菌群、大肠埃希氏菌、耐热大肠菌、肠球菌、菌落总数变化情况。实践表明,在不同的水温条件下,调整前加氯量和后加氯量对各个工艺阶段的微生物指标会产生显著影响,尤其是在炭滤池后未设置消毒接触池的情况下,对降低出厂水微生物风险、优化消毒过程加氯量有一定的参考意义。Microbial index is the most important indices of tap water and to ensure the microbial safety of tap water is always the first concern of the water treatment plant(WTP).This study takes a WTP utilizing Yangtze River water with advanced ozone-activated carbon treatment as an example,by adjusting the disinfection process,especially adjusting pre-chlorine and disinfection dosages,to compare the total coliform,Escherichia coli,heat-resistant coliform,Enterococcus,total colonies including the sedimentation tank outlet,the sand filter outlet,the carbon filter outlet and the tap water.The results indicate that the chlorine dosage significantly impacts microbial indices under different temperature conditions,especially in the case of without disinfection contact pool,providing insights on reducing the microbial risk of tap water and optimizing the chlorine dosages in the disinfection process.

关 键 词：自来水厂 消毒工艺 总大肠菌群 大肠埃希氏菌 耐热大肠菌 肠球菌 菌落总数 

分 类 号：TU991[建筑科学—市政工程]