人工快速渗滤系统非饱水层去除COD和氨氮

人工快速渗滤系统(CRI)非饱水层主要完成COD的降解和氨氮的转化,是影响整个系统出水效果的关键部分.通过实验,研究了CRI非饱水层对生活污水中COD和氨氮的去除效果,并分别就pH对其影响机理进行了探讨.结果表明,污水经过CRI非饱水层后,COD的平均浓度由220.66 mg/L降至19.36~25.59 mg/L,去除率为88.13%~90.90%;氨氮平均浓度由58.13 mg/L降至18.81~28.73 mg/L,去除率为49.40%~64.09%,前者去除效果基本不受pH影响,后者受pH影响较大.

Non-saturated layer of constructed rapid infiltration system about removing COD and ammonia nitrogen

Non-saturated layer of constructed rapid infiltration (CRI) system is mainly to complete the degradation of COD and the conversion of ammonia nitrogen. as a key part, it produces a very large effect on treatment effect of CRI. In this research, the removal efficiency of COD and ammonia nitrogen was studied after the rural sewage was treated through the non-saturated layer. Further, the influence mechanism of pH to the above studied treatment effect was discussed. Results showed that after the treatment of non-saturated layer, the concentration of COD and ammonia nitrogen reduced from 220.66 mg/L and 58.13 mg/L to 19.36—25.59 mg/L and 18.81—28.73 mg/L, respectively, the removal rates were 88.13%—90.90% and 49.40%—64.09%. The removal efficiency of COD was barely affected by the pH, but the pH greatly affected the removal efficiency of ammonia nitrogen.