地下渗滤系统处理生活污水中浓度去除率与系统去除率对比研究

Comparative Study of Concentration Removal Rate and System Removal Rate of Subsurface Wastewater Infiltration System in Domestic Sewage Treatment

通过在试验场建立地下渗滤系统装置,系统在运行达到熟化后,应用其处理生活污水,水力负荷为1.8 cm/d。结果表明,地下渗滤系统对COD、氨氮、总氮的平均浓度去除率分别为87.9%、98.3%、42.9%,平均系统去除率分别为92.3%、98.9%、62.9%。其中,出水COD、氨氮、总氮的平均浓度分别为16.8、0.41、32.78 mg/L。各指标系统去除率都大于浓度去除率,说明系统去除率比浓度去除率更能精确表示地下渗滤系统处理生活污水的能力,尤其是对总氮的去除率更高。

The subsurface wastewater infiltration system was applied in domestic sewage treatment with 1.8 cm/d hydraulic capacity.The results showed that the average concentration removal rate on COD,ammonia nitrogen,TN are 87.9%,98.3%,42.9%,the average system removal rate are 92.3%,98.9%,62.9%.The average concentration of COD,ammonia nitrogen,TN are 16.8,0.41,32.78 mg/L.The results showed that system removal rate all are higher than concentration removal rate,proving that system removal rate is more accurate than concentration removal rate for indicating subsurface wastewater infiltration system domestic swage treatment ability,especially for removal rate of TN.