DO对水解酸化池与好氧MBR组合工艺运行效果的研究

Study on the Results of Dissolved Oxygen in the Combined Process of Hydrolytic Acidification Pond and MBR

针对溶解氧(DO)和气水比对水解酸化池与好氧MBR组合工艺处理污水效果的影响和能耗问题,从气水比对DO的影响和DO对COD与色度去除效果的影响来讨论气水比、DO以及污水处理效果之间的最佳运行点。试验结果表明,在ρ(MLSS)分别为5.81、4.25、2.19g/L的运行条件下,MBR的最佳气水比39∶1、28∶1、18∶1;DO变化速率随污泥浓度的下降而升高,DO的变化对COD、色度的去除效果影响并不显著。

In view of the influence and energy consurnption of dissolved oxygen（DO） and air-water ratio on the treatment effect of effluent water with a combined process of an hydrolytic acidification pond and MBR, the effects of air-water ratio on DO and the effects of DO on the removal of COD and color was discussed in this paper. And the optimum working point of air-water ratio and dissolved oxygen was found for good treatment effect. The results showed that when the p（MLSS） were 5.81,4.25,2.19 g/L respectively, the optimum corresponding operating air-water ratio of MBR were 39 = 1,28 ： 1,18 ： 1. The variation rate of dissolved oxygen increased with the decreasing of sludge concentration. The variation of DO on the COD and color＇s removal effects was not significant.