多级臭氧气浮装置深度处理印染生化出水中试研究

摘要

针对传统印染废水深度处理工艺复杂、冗长等特点,开发了一种多级臭氧气浮一体化装置(DOIF).将臭氧与气浮分离相结合,同时引入第二级氧化单元,使臭氧得到最大程度的利用,在一个操作系统内实现了固液分离、脱色、降解有机物等多个环节.实验结果表明,该工艺对COD、色度、UV254、TOC的去除率分别可达到25.5％、54.5％、37.5％、32.4％,也是再生水回用中膜分离的预处理环节.%Since the characterizations of advanced treatment process of traditional dyeing wastewater are complicated and lengthy,a kind of multi-level integrated device,dual-step ozone induced flotation (DOIF) process has been developed.Ozone has to be combined with flotation separation,and the second-level oxidation unit introduced,in order to make full use of ozone,achieving several links,including solid-fluid separation,decolorization and organic matter degradation in one operation system.The results show that by DOIF process the removing rates of COD,color,UV254,and TOC can reach 25.5％,54.5％,37.5％,and 32.4％ respectively.The process is also a pretreatment step for membrane separation in reclaimed water reuse.