曝气量对间歇曝气/曝气生物滤池效能影响

The Aeration Quantity Impact on Efficiency of Intermittent Aeration/Biological Aerated Filter

研究间歇曝气/曝气生物滤池脱氮除磷效果,确定其最佳曝气量,为该种形式的曝气生物滤池高效运行提供依据。试验采用序批式曝气生物滤池和传统曝气生物滤池串联运行的方式,序批式曝气生物滤池(一级滤柱)在曝气量分别0.85L/(s·m2),1.27L/(s·m2),1.70L/(s·m2),2.12L/(s·m2)下运行,传统曝气生物滤池(二级滤柱)在曝气量分别为0.43L/(s·m2),0.85L/(s·m2),1.27L/(s·m2)下运行。试验结果表明:一级滤柱曝气量在1.70L/(s·m2)～2.12L/(s·m2)之间运行时,除磷效果好,出水TP含量在2.5mg/L以下,二级滤柱曝气量为0.85L/(s·m2)时,脱氮效果好,出水TN浓度为7.39mg/L,TN去除率达65.28%。采用间歇曝气/曝气生物滤池工艺能同时达到脱氮除磷的效果。

Research on the efficiency of denitrifition and dephosphorization of the aerated/intermittent aerated two-stage biological filter.Ascertain the best aeration quantity,supply gist for the high effective function of biological aerated filter. The test adopts the intermittent and traditional biological aerated filter series working.Intermittent biological aerated filter(first strain post) function under the aeration quality of 0.85L/(s·m2) ,1.27L/(s·m2) ,1.70L/(s·m2) ,2.12L/(s·m2) ,traditional biological aerated filter(second grade strain) function under the aeration quality of 0.43L/(s·m2) ,0.85 L/(s·m2) ,1.27L/(s· m2) .The test result proclaim:The first strain post function under the first strain post between 1.70L/(s·m2) and 2.12L/(s· m2) ,the fruit of dephosphorization is perfect.TP content of water outlet is under 2.5mg/l.The aeration quantity of the second grade strain is 0.85L/(s·m2) ,the effect of denitrification is ideal,the strength of water outlet is 7.39mg/L the removal rate of TN reaches 65.28% .The craft of aeration/intermittent biological aerated filter could denitrify and dephosphorize simultaneously.