摘要：

以某工业园区印染废水处理厂二级生化出水为处理对象，采用预氧化+膜生物反应器（MBR）+反渗透（RO）的组合工艺对其进行深度处理，以达到企业回用水要求。实验结果表明，在进水COD为105~120 mg/L，色度为50倍的条件下，当氧化剂用量为3 mg/L，MBR水力停留时间为3~3.5 h时，组合工艺的出水COD ≤ 5 mg/L，色度≤ 5倍，电导率≤ 20μS/cm，出水水质满足企业回用水要求，RO浓水COD ≤ 120 mg/L，色度≤ 50倍，达到排放标准。

关键词: 印染废水, 氧化剂, MBR, 反渗透

Abstract:

Taking the secondary biological treatment effluent of a dyeing wastewater treatment plant in an industrial zone as the treatment object,the combined process,pre-oxidation-membrane bioreactor(MBR)-reverse osmosis, has been used for its advanced treatment,in order to meet the requirements for the industrial reuse water. Experimental results show that under the conditions below:the influent COD is 105-120 mg/L,chroma 50 times,the dosage of oxidant 3 mg/L,and MBR hydraulic residence time 3-3.5 h,the effluent COD of the combined process is ≤ 5 mg/L,chroma ≤ 5 times,and conductivity ≤ 20 μS/cm,the effluent water quality meets the requirements for the industrial water reuse. RO concentrated water COD is ≤ 120 mg/L and chroma ≤ 50 times,achieving the discharge standard.

Key words: dyeing wastewater, oxidation agent, membrane bioreactor, reverse osmosis

中图分类号: 

• X703.1