后置/前置反硝化BAF处理生物絮凝出水对比研究

Comparative Study on Biological Flocculation Effluent Treated by Post/Pre-Denitrification BAF

针对生物絮凝吸附工艺处理生活污水的局限性,实验采用后置与前置反硝化曝气生物滤池分别对生物絮凝吸附出水进行深度脱氮研究。实验结果表明,后置反硝化工艺对COD、NH_4^+-N、TN的去除率分别为66.08%、95.39%、16.43%。前置反硝化工艺阶段,实验得出最佳工况:回流比为150%,气水比为4:1,水力负荷为3.01 m/h时,对COD、NH_4^+-N、TN的去除率分别为77.91%、94.69%、64.52%。对比发现改造后前置反硝化工艺较后置反硝化工艺对COD的去除率提高了11%,TN的去除率提高了48%,脱氮性能更加显著。

According to the limitations of wastewater treatment by biological flocculation and adsorption process, the post-denitrification and pre-denitrification BAF were used to treat the effluent from the process ofbio-flocculation and adsorption to achieve advanced nitrogen removal in this experiment.The experimental result indicate that with postdenitrification process ,the removal rates of COD, NH4＋-N, TN were 66.08%, 95.39% and 16.43%.The experimental conditions in pre-denitrification process stage were as follows： the reflux ratio was 150%, gas-water ratio was 4：1, hydraulic loading was 3.01 m/h, the removal rates of COD, NH4＋-N, TN were 77.91%, 94.69%, 64.52%. Comparative study on biological flocculation effluent treated by pre-denitrification, the removal rate of COD increased by 11%, and the removal rate of TN increased by 48% than that of the post-denitrification process, the denitrification performanced even more significant.