外回流比对组合工艺污染物去除效果的影响

Effect of External Reflux Ratio on Pollutant Removal of Combined Process

以校园生活污水为研究对象,考察絮凝—倒置A 2/O组合工艺在不同污泥回流比条件下的污染物去除效果。结果显示,污泥回流比对COD和氨氮的去除影响较小,当污泥回流比增大时,总磷的去除率减小,而总氮的去除率先增大后减小。在最优污泥回流比为200%时,组合工艺对COD、氨氮、总氮、总磷去除率分别为89.74%、97.16%、73.49%、67.23%。

Campus sewage is the research object,and the pollutant removal effect of flocculation-inversion A2/O combined process under different sludge reflux ratio was investigated.The results showed that the sludge reflux ratio had little influence on the removal of COD and ammonia nitrogen.When the sludge reflux ratio increased,the removal rate of total phosphorus decreased.Meanwhile the removal rate of total nitrogen increased first and then decreased.When the optimal sludge reflux ratio was 200%,the removal rates of COD,ammonia and total phosphorus reached 89.74%、97.11%、73.49%、67.23%respectively.