高有机物污染原水深度处理工艺选择和运行优化

P市地表原水受到有机物污染,水中CODMn经常高达10mg/L以上,为此,在G水厂的扩建工程中,采用了两级臭氧—生物活性炭深度处理工艺,以保证出水水质安全。水厂运行结果表明,在活性炭吸附饱和后,一级炭池出水CODMn仍有3～5mg/L,需二级臭氧—生物活性炭处理才能使出厂水CODMn小于3mg/L。当前后臭氧分级投加比例为3∶2时,有机物的去除率最高。

Process selection and optimization of the advanced treatment for the high organic polluted raw water

The raw water of P City was polluted by organic pollutants and the CODMn of the raw water was often above 10 mg/L.To ensure the safety of the drinking water,two-stage O3-BAC was used in G Water Treatment Plant extension project.The results showed that with the absorb saturation of the GAC,the CODMn in the effluent of the first stage O3-BAC still remained at 3~5 mg/L,which made the second stage O3-BAC needed to lower the CODMn in finished water to less than 3 mg/L.When the O3 dosage ratio between the first and the second stage was 3∶2,the highest organic removal rate could be achieved.