新型填料曝气生物滤池处理生活污水的研究

Research on Biological Aerated Filter Using New Media for Domestic Sewage Treatment

采用以粉煤灰固定化絮凝剂颗粒为填料的曝气生物滤池处理生活污水,考察了水力负荷、气水比及进水有机物浓度对COD和氨氮去除效果的影响。结果表明,在水力负荷为1.1～1.5 m3/(m2.h)、气水比为4∶1、进水COD<453.26 mg/L的最佳条件下,系统对COD和NH3-N的去除率分别大于93%和90%。曝气生物滤池对有机物的去除主要发生在厚度<40 cm的下层填料中,厚度为40～80 cm的填料主要承担对氨氮的去除作用。

Fly ash immobilized flocculating agent particle was used as a new type of media for biological aerated filter （BAF） to treat domestic sewage. The effects of hydraulic load, alr/water ratio, organic concentration in influent on removal efficiencies of COD and NH3 - N were investigated. The results show that under the optimal conditions of the hydraulic loading of 1.1 to 1.5 m^3/（ m^2 · h） , the air/water ratio of 4 ： 1 and the influent COD concentration of less than 453.26 mg/L, the resulting removal efficiencies of COD and NH3 - N reach over 93% and 90% respectively. Organic removal in BAF occurs within 40 cm thickness of the media, and the media of 40 - 80 cm thickness is used for NH3 - N removal.