MBR+RO用于印染废水分质处理及回用

Application of MBR + RO Membrane Technologies in Printing and Dyeing Wastewater Segregated Treatment and Reuse

印染废水水量大、污染物种类多、成分复杂,采用清浊分流、分质处理,可充分发挥各段工艺优势。以双膜法(MBR+RO)为核心,采用物化+生化+膜工艺深度处理印染废水,在系统平均进水COD、氨氮、电导率分别为2 310.35 mg/L、121.20 mg/L、3 420μS/cm的情况下,系统平均产水COD、氨氮、电导率分别为6.28 mg/L、15.87 mg/L、73.70μS/cm,RO产水浊度、色度平均值分别为0.11 NTU、4.47倍,满足印染工艺回用标准。

Printing and dyeing wastewater of the textile industry are high volume, heavily polluted and complex wastewaters containing many coloring agents and persistent organic contaminants. Segregated pretreatment of printing and dyeing wastewater streams and/or recycling of valuable resources of the wastewaters are often advantageous. Taking the double membrane method （MBR ＋ RO） as the core process, combined process of physio-chemistry ＋ biochemistry ＋ membrane technology was adopted in the project for advanced treatment of printing and dyeing wastewater. The project operation results showed that the average influent concentrations of COD, NH3 - N and electrical conductivity were 2 310.35 mg/ L, 121.20 mg/L and 3 420 μS/cm respectively. While the corresponding average effluent concentrations were 6.28 mg/L, 15.87 rag/L, and 73.70 μS/cm respectively. The average turbidity and chromaticity of RO effluent were 0. 11 NTU and 4.47 times, which could meet the reuse standard of dyeing and print- ing technology.