二段生物接触氧化法处理生活污水启动挂膜试验研究

摘要

[Objective] The research aimed to study start-up period of the two-stage bio-contact oxidation process in domestic sewage treatment and degradation processes of the CODCr,NH4 +-N,NO2--N and NO3--N during membrane hanging period.[Method] By using two-stage bio-contact oxidation process to treat domestic sewage,start-up period of the reactor and degradation processes of the CODCr,NH4 +-N,NO2--N and NO3--N during membrane hanging period were discussed.[Result] Below 15 ℃,start-up membrane hanging time of the reactor was about 14 d.Test device had good removal effect on CODCr and NH4 +-N.When test device ran stably,removal rate of the CODCr maintained above 65％,and removal rate of the NH4 +-N was above 20％.Moreover,NO2--N accumulated seriously.[Conclusion] Treatment of the domestic sewage by two-stage bio-contact oxidation process had stable effect,strong anti-shock loading capability and short membrane hanging time.%[目的]研究二段生物接触氧化法处理生活污水启动周期及挂膜期间CODCr、NH4+-N、NO2--N、NO3--N降解过程.[方法]采用二段生物接触氧化法处理生活污水,探讨反应器启动周期与挂膜期间CODCr、NH4+-N、NO2--N、NO3--N降解过程.[结果]温度在15℃以下,反应器启动挂膜时间为14 d左右.试验装置对CODCr、NH4+-N有较好的去除效果,稳定运行时CODcr的去除率保持在65％以上,NH4+-N的去除率在20％以上,并且出现了NO2--N的严重积累.[结论]二段生物接触氧化法处理生活污水效果稳定、抗负荷冲击能力强、挂膜时间短.