印染废水深度处理及回用研究进展

针对印染废水存在碱度大、成分复杂和可生化性差等问题，为优化印染废水的深度处理工艺，提高印染废水的处理效率，分析了印染废水的水质特点，阐述了印染废水深度处理各阶段（预处理、生化处理、深度处理）选用的主要工艺，对比了传统深度处理法与膜技术对印染废水中杂质去除的选择性差异。分析认为：印染废水预处理和生化处理工艺现已成熟，吸附法、高级氧化法可较好实现印染废水深度处理，但印染废水脱盐回用已成为亟待解决的问题，膜分离技术可实现高效脱盐，然而单一膜技术却存在膜污染、稳定性差的不足；印染废水深度处理应重点加强对预处理/ 生化处理/ 多膜工艺的优化组合工艺的研究。

Research progress on deep treatment and recycling of dye wastewater

Dye wastewater has some problems such as high alkalinity, complex composition and poor diodegradability. In order to optimize the advanced treatment process and improve the treatment efficiency of dye wastewater, the characteristics of dye wastewaterwere analyzed and the primary processes for the various stages (preteratment, biochemical treatment and deep treatment)were reviewed in advanced treatment processes.The selective difference between conventional advanced treatment process and membrane separation process for removal impurities of dye wastewater were compared. The reaults showed that the pretreatment and biochemical treatment of dye wastewater is mature at present, and adsorption and advanced oxidation processes could be used to achieve the deep treatment of dye wastewater, but its recycling and desalination has become an urgent problem. Though the membrane technology could efficiently desalinate, the single membrane techonlogy has the problems of pollution and lack of stability. Overall, the deep teratment of dye wastewater should focuse on the optimization combination of pretreatment, biochemical treatment and membrane technology.