SBBR工艺溶解氧分布及传氧速率研究

In this paper, the distribution of dissolved oxygen concentration and the variation of oxygen transfer rates in different media at low temperature condition in sequencing batch biofilm reactor (SBBR) were investigated. In addition, the dissolved oxygen (DO) and temperature in raw water for 12 hours was determined. The results showed that the DO concentration is saturated basically, when the dissolved oxygen reaches 8.0mg/L in the sewage which the sludge concentration was 1.06g / L, the Oxygen transfer rate in sewage with sludge is lower than that in sewage without sludge. Because of the sludge activity is low, the dissolved oxygen concentration between the two pools of sewage has no significant difference in the contrast test, especially after 35min，when the dissolved oxygen in sewage was saturated.