蚯蚓生物滤池处理生活污水的中试研究

Pilot-scale Study on Municipal Wastewater Treatment by Vermi-biofilter

采用蚯蚓生物滤池(VBF)对城市生活污水进行中试研究。结果表明,当VBF水力负荷为1.3～1.5m3/(m2·d)时,出水有机物和氮、磷等污染物指标基本上满足国家《城镇污水处理厂污染物排放标准》(GB18918-2002)二级标准;出水CODCr和BOD5平均浓度分别为55.44mg/L和11.5mg/L,平均去除率分别为80.37%和90.66%;并具有较好的脱氮除磷效果,NH3-N,TN和TP的平均去除率分别为42.91%,30.23%和19.96%;且VBF出水DO浓度接近饱和,最高达11.7mg/L,有利于受纳水体中的生物生长。

Pilot-scale study was conducted to treat municipal wastewater by vermin-biofiher. The results showed that, when hydraulic load of VBF was 1.3-1.5m^3/（m^2·d）, the effluent quality could steadily meet the second level criteria specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant （GB 18918-2002）. The average CODcr and BOD5 concentration in effluent were 55.44 mg/L and 11.5 mg/L, respectively. And their average removal efficiency were 80.37% and 90.66%, respectively. The average removal efficiency of NH3-N, TN and TP were 42.91% ,30.23% and 19.96%, respectively. Meanwhile, the dissolve oxygen in effluent could almost reach the saturation value, the highest DO concentration was 11.7 mg/L, which had good effect on the growth of aquatic organisms in the receiving water body.