CN CN101229946A
The present invention relates generally to a kind of filtrate of disposing of sewage, and relates in particular to the filtrate that uses in the BAF sewage treatment.The filtrate that a kind of BAF is disposed of sewage is characterized in that described filtrate raw material composition includes flyash 60～75%, silicate cement 10～20%, unslaked lime 10～20%, gypsum 3～5%, degreasing aluminium powder 0.06～0.08%.Its preparation process is: slurrying, stirring, cast, excision forming, ball milling.Under best gas-water ratio and hydraulic load condition, use powder ash air-entrained concrete particle BAF and handle sanitary sewage, when the water inlet mean concns was 176mg/L, the COD average removal rate was 75.3%, the water outlet mean concns is 42.7mg/L; NH-N average removal rate is 96.4%, and the water outlet mean concns is 0.87mg/L, and sewage discharge GB18918-2002 one-level A standard is satisfied in water outlet.
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