反应沉淀一体式矩形环流反应器处理城市污水的影响因素研究

Study on effect for municipal wastewater treatment using reaction-precipitation integrated rectangular airlift loop reactor

通过中试研究了不同溶解氧浓度、有机负荷、HRT条件下,反应沉淀一体式矩形环流反应器(RPIR)对深圳市南山污水处理厂低C/N城市污水的处理效果。结果表明,在控制溶解氧浓度为1 mg/L、COD容积负荷小于2.5 kg/m3.d、NH4+-N容积负荷不超过0.2 kg/(m3.d)、HRT为4 h时,COD平均去除率可达90%,NH4+-N平均去除率超过80%。RPIR在处理该城市污水过程中具有良好的抗冲击负荷能力,污染物去除效率高,运行稳定。

A pilot-scale reaction-precipitation integrated rectangular airlift loop reactor（RPIR） was used to investigate the effect of organics and nutrient removal in low C/N ratio municipal wastewater under different conditions.The conditions included the dissolved oxygen（DO）,the organic loading rate（OLR） and the hydraulic retention time（HRT）.The results showed that the removal of COD and nitrogen was up to 90% and 80%,respectively at the loading rates of 0.5～2.5 kg COD/（m3·d） and lower than 0.2 kg nitrogen/（m3·d）,when the DO was controlled at the level of 1 mg/L and the HRT was maintained at 4 hours.RPIR showed good resistance to shock loading,excellent contaminant removal capacity and operating stability.