新型生物膜反应器处理传统村落生活污水的挂膜研究

Investigation into Biofilm Colonization on a New-Type Biofilm Reactor for Domestic Wastewater Treatment in Traditional Villages

利用自主设计的一套新型生物膜反应器处理传统村落生活污水,采用人工投加活性污泥的挂膜方法对反应器进行挂膜启动,研究了COD负荷、C/N比以及回流比对反应器运行效果的影响.实验结果显示:投加活性污泥的挂膜方式能够在较短的时期内挂膜成功,且挂膜过程中生物膜外观以及微生物相变化都较为明显;挂膜成功后,COD和NH_4^+-N的去除率达到85%以上;在运行过程中,该生物膜反应器的运行效率受COD负荷、C/N比和回流比的影响较大,在COD负荷为0.25 kg/(m^2·d)、C/N比为10.2、回流比为9.17时,反应器的COD和NH_4^+-N去除率最高,分别达到91.46%和88.65%.

A new-type biofilm reactor started up by adding activated sludge manually was designed to treat the domestic wastewater in traditional villages,and the influences of COD load,C/N ratio and the reflux ratio on system operation were investigated. Experimental results show that( 1) the addition of activated sludge helps successfully colony biofilm with good appearance and obvious microbial morphology variation in a short time;( 2) both COD and NH_4^+-N removal efficiencies achieve more than 85% after the biofilm colonization;( 3) the operating efficiency of biofilm reactor is greatly affected by COD load,C/N ratio and reflux ratio; and( 4) the COD and NH_4^+-N removal efficiencies respectively achieve 91. 46% and 88. 65% at a COD load of 0. 25 kg/( m^2·d),a C/N ratio of 10.2and a reflux ratio of 9. 17.