生物絮凝吸附与曝气生物滤池组合工艺处理生活污水

针对曝气生物滤池容易堵塞和进水中COD不宜太高的问题,而生物絮凝吸附工艺对进水中SS和COD有着较好的去除效果,提出了生物絮凝吸附与曝气生物滤池的组合工艺处理生活污水。试验表明,生物絮凝吸附能较好的去除水中的颗粒性物质、悬浮性物质和有机物,其对SS的去除率达到了69%,对COD的去除达到了61.8%,减少了后续曝气生物滤池进水的SS和COD。组合工艺对COD的平均去除率为93.7%,对氨氮的平均去除率为93.6%,总的出水SS几乎为零。在无外加碳源的情况下对TN的去除效果不好,在C/N=5时,出水的ρ(TN)≤2 mg/L,其总的平均去除率达到了95.35%。整个系统对磷酸盐的平均去除率只有为54.9%。

COMBINED BIO-FLOCCULATION ADSORPTION AND BIOLOGICAL AERATED FILTEP(BAF) FOR TREATMENT OF THE DOMESTIC SEWAGE

In view of problems that the biological aerated filter(BAF) was blocked easily and the influent COD waas not good being overtop,people put forward a technology which combine bio-flocculation adsorption and the biological aerated filter(BAF) to treat the domestic sewage based on the bio-flocculation adsorption had a very good efficiency for the influent SS and COD.The results showed that,the bio-flocculation adsorption had a very good efficiency for particulate matter,suspended substances and organic,the removal rates of SS and COD reached 69% and 61.8%,as a result,it reduced the biological aerated filter influent SS and COD.The removal rates of the combined system on COD and NH3-N reached 93.7% and 93.6%,the effluent SS was almost zero.There was low nitrogen rate without external carbon source.In the case of C/N=5,the effluent TN was less than 2 mg/L,the average removal rate reached 95.35%.The average removal rates of the combined system on phosphate reached 54.9%.