Abstract:

The membrane bioreactor （MBR） coupled with UV oxidation system has been used for treating simulated dyeing wastewater. The effects of the treatment effectivenss and bio-augmentation capacity on MBR process have been studied. MBR system is to be operated under the conditions of T=25 ℃，pH=6，HRT=10 h and DO=3~5 mg/L，running time 60 d，and the augmented strains are dosed into MBR in a certain proportion of 0.5%. The results illustrate that the UV oxidation lowers the toxicity of the wastewater greatly，and the total average removal rate of TOC reaches 89%. The effluent water quality is pretty good. Moreover，bio-augmentation makes the activated sludge take on better physiological activity and anti-shock loading capability.

Key words: UV oxidation, membrane bioreactor, dyeing wastewater, bio-augmentation

摘要：

采用UV 氧化+膜生物反应器（MBR）组合工艺处理模拟印染废水，考察了该工艺的处理效果及生物强化作用对MBR 工艺的影响。MBR 实验条件为：水温25 ℃，pH=6，水力停留时间10 h，溶解氧3~5 mg/L，运行时间60 d，强化菌种按质量分数0.5%投入到MBR。实验结果表明， UV 氧化大大降低了废水的毒性，组合工艺对TOC 的总平均去除率达到89%，出水水质良好。此外，生物强化使活性污泥具有更好的生理活性和抗冲击负荷能力。

关键词: UV氧化, 膜生物反应器, 印染废水, 生物强化

CLC Number: 

• X703