摘要：

在30～35 ℃的常温条件下，采用EGSB 反应器处理焦化废水，考察了进水COD、曝气量和液体上升流速等因素对COD 去除效果的影响。实验结果表明：(1)进水COD 的增加，使得反应器中的有机负荷上升，导致COD 去除率大幅下降；(2)提高曝气量，促进了颗粒污泥中不同菌群间的协同代谢作用，有利于COD 的去除；(3)合适的上升流速，强化了泥水两相间的传质效果，可以实现COD 的有效去除。

关键词: EGSB反应器, 焦化废水, 曝气量

Abstract:

EGSB reactor has been used for treating coking wastewater at 30-35 ℃ normal temperature.The influences of the factors,such as the influent COD concentration,oxygenation and liquid up-flow velocity,etc.on its COD removing efficiency have been investigated.The results show that:(1)As the influent COD concentration increases,the organic loading in the reactor also increases,resulting in the COD removal efficiency dropping significantly;(2)It is found that increasing the amount of oxygenation promotes the communal synergistic metabolisms between different flora in granular sludge,which is good for the COD removal;(3)when the liquid up-flow velocity is suitable,the reactor has a better mass transfer effect between the two phases of sludge and water and can achieve effective removal of the COD.

Key words: EGSB reactor, coking wastewater, oxygenation?

中图分类号: 

• X703