AAO-MBBR工艺在农村生活污水中应用效果研究

AAO-MBBR process in rural domestic sewage applied effects research

【目的】研究农村污水处理新工艺AAO-MBBR模式运行最佳工况和其对污染物的处理效果。【方法】通过对比不同停留时间、不同内循环比、不同好氧池溶解氧质量浓度下污染物去除率,筛选出设备最佳运行参数,设置设备在最佳工况运行时,分析其对各污染物处理效果。【结果】改良后的AAO-MBBR新工艺在水力停留时间8 h、内循环比为300%、好氧池溶解氧质量浓度为2.5 mg/L时,污染物去除效果最佳。在最佳工况运行时,设备对SS(悬浮物)、COD(化学需氧量)、BOD(生物需氧量)、NH_(3)-N(氨氮量)和TP(总磷量)的去除率分别为80%、85%、91%、84.5%和46%,处理效果显著高于其他污水处理设备。【结论】改良AAO-MBBR工艺一体化污水处理设备污染物去除效果较好。

【Objective】The purpose of this paper is to study the optimal operation condition of AAO-MBBR mode of the new rural sewage treatment process and its treatment effect on pollutants.【Method】By comparing the pollutant removal rate under different residence time,different internal circulation ratio and different aerobic tank dissolved oxygen concentration,the optimal operation parameters of the equipment were screened out,and the equipment was set to operate under the optimal operating condition.The treatment effect on various pollutants was analyzed.【Result】The results showed that the improved AAO-MBBR process had the best removal effect when the hydraulic retention time was 8 h,the internal circulation ratio was 300%and the concentration of dissolved oxygen in aerobic pool was 2.5 mg/L.Under optimal operating conditions,the removal rates of SS,COD,BOD,NH_(3)-N and TP of the equipment were 80%,85%,91%,84.5%and 46%,respectively.And the treatment effect is significantly higher than that of other sewage treatment equipment.【Conclusion】The improved AAO-MBBR process has a good effect on pollutant removal in integrated wastewater treatment equipment.