Full-scale Test Study on Optimization of Ozone/Activated Carbon Advanced Treatment Process for Preventing Microbial Leakage
In this study,the advanced treatment process of ozone and activated carbon in a drinking water treatment plant in Shanghai was taken as the research object to study the characteristics of microbial leakage after granular activated carbon(GAC)treatment,and optimize the ozone and activated carbon treatment to prevent and control the microbial leakage.Before optimization,the total bacteria,coliform and heterotrophic bacteria in the effluent of the GAC filter had different degrees of leakage.The concentrations of total bacteria,coliform and heterotrophic bacteria increased by 8,7,and 21 times,respectively,compared to the influent.Moreover,controlling the ozone dosages above 0.8 mg·L-1,reducing the operation cycles to 3 d and shortening the Air and water flushing time to 5 min+5 min were effective methods to control microbial leakage.
advanced water treatmentozone and activated carbon filtermicrobial leakagefull-scale testoperation cyclebackwash mode
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