粉煤灰加气混凝土颗粒曝气生物滤池处理污水试验研究

Experiments on biological aerated filter of fly-ash aerated concrete particles in wastewater treatment

在不同气水比、水力负荷条件下,应用粉煤灰加气混凝土颗粒曝气生物滤柱进行生活污水试验,结果表明,粉煤灰加气混凝土颗粒填料表面更易于形成硝化菌生物膜;兼顾处理效率与运行经济的最佳组合的气水比为2,水力负荷为30.72 m3/（m2.d）。有机负荷保持在8.04～10.08 kg COD/（m3.d）之间,COD和NH3-N平均去除率分别达到74.2%和92%,出水COD、NH3-N平均浓度分别在60 mg/L和1 mg/L,达到GB18918-2002一级A标准,粉煤灰加气混凝土颗粒可以应用于曝气生物滤池处理污水工艺。

In this experiment residential wasterwater was treated using the fly-ash aerated concrete particles BAF disposal at different gas to liquid ratios and hydraulic loadings. The results show that nitrifier was easy to grow on the face of fly-ash aerated concrete particles, and best gas to liquid ratios and hydraulic loadings were 2 ： 1 and 30.72 m3/（m2· d） , respectively, according to the treatment efficiency and economical operation. When the COD load was kept between 8.04 and 10.08 kg COD/（m3 · d） , the average removal rates of COD and NH3-N reached 74.2% and 92% , respectively, and the average effuent concentrations of COD and NH3-N of wastewater was 60 mg/L and 1 rag/L, which measured up the A standards in the first class of GB18918-2002. The study suggested that the biological aerated filter can be used to treat wastewater.