Study On Optimization Of Ozone Biological Actived Carbon Method In Drinking Water Treatment

Recently, with the advance of the standard of living, people put forward higher demand for the quality of drinking water. At the same time, as the drinking water resource polluted, the traditional treatment processes are being challenged. The deeply treatment process become more important because of the localization of the traditional treatment in drinking water.As a kind of predominant technology, ozone biologically Actived Carbon method in drinking water treatment has been extensively applied at domestic and aboard. In order to achieve purified water and decrease disinfect-outgrowth simultaneously, the quantity of ozone and the process of treatment must adapt to kinds of water quality. So it is very important to optimize and control this process.In this paper, we choose the Shenzhen reservoir water as research object. And then laboratory-scale and pilot-scale experiment are carried with ozone biologically Actived Carbon method. In the experiment, concentration of organic pollutant, THMFP/HAAFP and AOC are selected as the chief quality standard of water, and the main parameters influencing their performance are investigated.The optimized operating condition are found througth the experiment, pre-ozone dosage 0.5mg/L, main-ozone dosage 1.0mg/L; and in this condition, the removal rate of disinfected outgrowth precursor is high and stable; the UV254 of treated water is lower than 0.01, COD_mn is about 0.7mg/L, and biology in the water isn't increased; AOC is stablized at the 50ug acetic acid carbon per litre; adding CaCl₂ can improve the water quality in the flocculation-deposition process, which will be a manipulated measure while the resource water are polluted.