曝气生物滤池处理性能影响因素实验研究

采用上向流曝气生物滤池处理生活污水，考察了气水比、水力负荷、有机负荷、滤料层高度等因素对曝气生物滤池处理性能的影响。结果表明，气水比为5：1时，COD和NH3-N的去除率分别为87．6％和60．1％；水力负荷在0．21—0．86m^3／（m^2·h）的条件下，COD的去除率随水力负荷的增加降幅较小，NH3-N的去除率下降明显；有机负荷在1．15～2．96kg／（m^3·d）的条件下，BAF表现出很好的抗有机负荷冲击能力。BAF对有机物的去除主要发生在滤料层0～70cm段，对NH3-N的硝化主要发生在滤料层40—100cm段。

The Experimental Study on Influence Factors of Biological Aerated Filter

An up -flow biological aerated filter （UBAF） was used to treat domestic wastewater. The influence of gas - water ratios, hydraulic loading, organic loading and filter height on the removal efficiency of the biological aerated filter was investigated. The results showed that when the gas - water ratios was 5 ： 1, the removal rates of COD and NH3 - N was respectively 87.6% and 60. 1% ; when the hydraulic loading was 0. 21 - 0.86 m3/ （ m2 . h）, the removal rate of COD was gradually decreased with increasing hydraulic loading, the removal rates of NH3 - N was significantly decreased; when the organic loading was 1. 15 -2.96 kg/ （m3 . d） , the BAF process showed the strong resistance to the sudden change of organic loading. The COD was removed mainly in the layer from 0 to 70era thickness, and nitrogen from 40 - 100cm thickness.