臭氧溶气气浮对污泥中典型肠道病原体的去除效果研究  

Reduction Effect of Typical Enteric Pathogens in Sludge by Dissolved Ozone Flotation System

作　　者：刘枫 陈江峰 董滨[3] 李翀 陈祥 李锟 王先恺 LIU Feng;CHEN Jiangfeng;DONG Bin;LI Chong;CHEN Xiang;LI Kun;WANG Xiankai(National Engineering Research Center of Eco-environment in the Yangtze River Economic Belt,China Three Gorges Corporation,Wuhan 430014,China;School of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093,China;College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]中国长江三峡集团有限公司,长江经济带生态环境国家工程研究中心,湖北武汉430014 [2]上海理工大学环境与建筑学院,上海200093 [3]同济大学环境科学与工程学院,上海200092

出　　处：《环境科学与技术》2024年第12期123-130,共8页Environmental Science & Technology

基　　金：中国长江三峡集团有限公司科研项目(NBWL202300013)。

摘　　要：城镇污水厂是城镇居民生活污水的主要接纳处理场所,剩余污泥作为污水处理的副产物,汇聚了污水中未处理的污染物,其中包括大量的未灭活病原体。该文探究了含臭氧溶气气浮工艺在不同臭氧剂量的的处理条件下对污泥中的大肠菌群、腺病毒和诺如病毒的去除效果。结果表明,臭氧剂量从0 mg/g SS增加至2.0 mg/g SS时,气浮调理后污泥中总大肠菌群的灭活对数由0.02 lg增至1.86 lg,粪大肠菌群的灭活对数由0.03 lg增至2.01 lg,且在经过1.5 mg/g SS的臭氧剂量处理后,剩余污泥中粪大肠菌群的浓度可达到美国环保局制定的B级标准。在2.0 mg/g SS的臭氧剂量处理条件下,气浮调理后污泥中诺如病毒与腺病毒的整体灭活对数为1.42 lg和1.69 lg,通过对其健康风险进行定量计算可得,诺如病毒与腺病毒的疾病负担分别为2.61×10^(-7)和3.62×10^(-8),均满足世界卫生组织推荐的10^(-6)的标准值。臭氧溶气气浮工艺可以有效去除剩余污泥中赋存的病原体,降低后续处理处置健康风险,为污泥卫生化利用提供了技术与理论参考。The production of wastewater activated sludge(WAS),an inevitable by-product of biological wastewater treat⁃ment,continues to increase.WAS carries a large number of pathogenic bacteria and toxic and harmful pollutants,which will inevitably cause serious pollution to the environment if not properly treated.Results of the study on pathogen removal by ozone air flotation showed that the ozone dose increased from 0 mg/g SS to 2.0 mg/g SS,the total E.coli flora inactivation rate increased from 0.02 lg to 1.86 lg,the fecal E.coli flora inactivation rate increased from 0.03 lg to 2.01 lg,and the fecal E.coli flora content in the residual sludge could meet the Category B criteria established by the US EPA after treatment with an ozone dose of 1.5 mg/g SS.While the 2.0 mg/g SS ozone dose had an overall inactivation ratio of norovirus to adenovirus of 1.42 lg and 1.69 lg,as calculated by quantifying its health risk,its disease burden was 2.61×10^(-7)and 3.62×10^(-8),all reaching the standard values of 10^(-6)recommended by the World Health Organization.Ozone air flotation can effectively remove the pathogens present in the remaining sludge and reduce the health risk for disposal by subsequent treatment,which provides a technical and theoretical reference for sludge sanitary utilization.

关 键 词：臭氧溶气气浮 污泥 病原体 风险评估 

分 类 号：X703[环境科学与工程—环境工程]