研发了1种小型一体化污水处理装置,采用自然充氧和机械曝气相结合的方式,以减少能源消耗.实验考察了HRT和硝化液回流对处理效果的影响.结果表明,设定的4组HRT条件(厌氧36 h、好氧16.8 h,厌氧18h、好氧8.4 h,厌氧12h、好氧5.6h,厌氧12h、好氧2.8 h)中,处理效果与HRT成正比,COD、NH3-N、TP的去除率分别为79％～91％、57％～79％、41％～62％;综合考虑处理效果和成本,HRT以厌氧12h、好氧5.6 h时较为适合,出水COD和NH3-N、TP可分别满足GB 18918-2002污水排放一级A标准和二级标准.当硝化液回流体积比分别为50％、100％和200％时,TN的去除率分别为52％、60％、64％;回流体积比在100％和200％时,出水TN的质量浓度低于20 mg/L.“,”A small-sized integrated wastewater treatment device was developed,which used natural oxygenation and mechanical aeration to reduce energy consumption.The effects of hydraulic retention time (HRT) and nitrification liquid reflux ratio were studied.The results showed that in the different HRT condition set as anaerobic 36 h,aerobic 16.8 h;anaerobic 18 h,aerobic 8.4 h;anaerobic 12 h,aerobic 5.6 h;anaerobic 12 h,aerobic 2.8 h;treatment effect is proportional to HRT.The removal effect of COD,NH3-N and TP were 9％～91％,57％～79％,41％～62％,respectively.In an overall consideration of treatment efficiency and cost,the anaerobic and aerobic time should be 12 h and 5.6 h,respectively,and the COD,NH3-N and TP in effluent can meet the requirement of the first and the second level of GB 18918-2002.When the nitrification liquid reflux ratios were 50％,100％ and 200％,the removal effect of TN were 52％,60％ and 64％.The effluent mass concentration of TN was less than 20 mg/L when the volume reflux ratios were 100％ and 200％.