两级曝气生物滤池处理生活污水的中试研究

Pilot-scale study on municipal wastewater treatment by two-stage biological aerated filter

通过两级曝气生物滤池处理城市生活污水的中试研究,探讨气水比、水力负荷、回流比及甲醇投加量等工程控制参数,对两级曝气生物滤池处理城市生活污水效果的影响。结果表明,当气水体积比为3,水力负荷为2～3m3/(m2·h),回流比为80%,甲醇投加量为80mg/L,滤料高度均为2.5m时,两级曝气生物滤池处理效果最佳,其出水可达《城镇污水处理厂污染物排放标准》标准中的一级A标准。

The influences of gas-water ratio, hydraulic loading, reflux ratio, methanol dosage and some other engineering control paramenters on municipal wastewater treatment effect by two-stage biological aerated filter were discussed through the pilot-scale study. The results showed that, when the gas-water volume ratio was 3, the hydraulic loading was 2 - 3 m3/（m2·h）, the reflux ratio was 80%, the methanol dosage was 80 mg/L, the fiher material height was 2.5 m, the effect of the wastewater treatment reached the best, the quality of the effluent water met the specification for A level of grade 1 in Discharge standard of pollutants for municipal wastewater treatment plant.