摘要：

溶解氧是影响丝状菌污泥膨胀的重要因素之一。以石化废水和啤酒废水为处理对象，对低溶解氧污泥膨胀进行了污泥沉降性能恢复的试验研究。结果表明，在较高的DO浓度下运行，能使膨胀污泥的沉降性能恢复到良好状态，且恢复时间及恢复速率均与污泥膨胀程度呈正相关关系。污泥负荷是影响膨胀污泥沉降性能恢复的因素，在一定低污泥负荷下，通过提高DO浓度并不能使低DO膨胀污泥的沉降性能得到有效恢复。

关键词: 污水处理, 丝状菌污泥膨胀, 溶解氧, 污泥沉降性能

Abstract:

tract: Dissolved oxygen is one of the most important factors which influences filamentous sludge bulking. By using brewery wastewater and petrochemical wastewater as influent, the experimental study has been made on the recovery of settleability of bulking sludge happening at low dissolved oxygen operation. The results show that the higher dissolved oxygen concentration can result in the recovery of bulking sludge settleability, and recovery time and rate are in positive correlation with bulking level. Sludge load is a factor affecting the recovery of bulking sludge settleability. Under a certain low sludge load, the bulking sludge settleability can not be improved effectively.

Key words: wastewater treatment, filamentous bulking sludge, dissolved oxygen, sludge settleability

中图分类号: 

• X703.1