分段进水SBR工艺脱氮除磷特性试验研究

A study on step-feed SBR for removal of nitrogen and phosphorous

以实际城市污水为处理对象,在有效容积为15 L的SBR反应器中进行了分段进水试验研究,结果表明:分段进水SBR工艺处理城市污水具有耐冲击负荷强、出水水质稳定等特点,在HRT为18 h,SRT为12 d的条件下对TCOD,SCOD,NH3-N,TN和TP的去除率分别为91.03%,84.4%,97.88%,68.9%和82.8%,出水水质达到城镇污水处理厂污染物排放标准(GB 18918-2002)中一级标准的B标准。

A step-feed SBR with useful volume of 15 L for nitrogen and phosphorous removal of municipal water was discussed.Hydraulic retention time（HRT） is 18 hours and sludge retention time（SRT） is 12 days.The results showed that step-feed SBR is efficient for municipal water treatment,having strong capability against impact load.Under 18 hours of hydraulic retention time（HRT） and 12 days of sludge retention time（SRT）,the average removal efficiency of TCOD,SCOD,NH3-N,TN and TP can reach to 91.03%,84.4%,97.88%,68.9% and 82.8%.The effluent coming from the step-feed SBR is lower than the absolute standard＇s B standard of discharge standard of pollutants for municipal wastewater treatment plant（GB 18918-2002）.