复合变速生物滤池处理污水厂二级出水

Use of Variable-rate Hybrid Biofilter for Treatment of Secondary Effluent from Municipal Wastewater Treatment Plant

采用由新型酶促填料和素陶粒填充构成的新型复合变速生物滤池对某城市污水厂二级处理出水进行了过滤试验。结果表明 :在HRT为 1 33～ 50min、滤池连续运行 2～1 2d时产水量为 72～1 92m3 d,对COD、浊度的去除率分别达到 60 .9%～ 73 .1 %和 69.4%～ 82 .8% ,出水水质满足《生活杂用水水质标准》(CJ 2 5 .1— 89) ,回用于厂区日常冲洗、绿化可取得良好的综合效益。

A new type variable-rate hybrid biofilter composed of enzyme-catalyzed packing and ceramsite was tested on the treatment of secondary effluent from municipal wastewater treatment plant. The test result showed that water yield is 72 ～ 192 m 3/d and removal rate of COD and turbidity come respectively up to 60.9% ～ 73.1% and 69.4% ～ 82.8% at HRT of 133 ～ 50 min and continuous operation for 2 ～ 12 d. The effluent quality meets the Miscellaneous Domestic Water Quality Standard (CJ 25.1 - 89). The treated effluent is reused for routine flushing and greening in plant area with good overall benefits.