复合组分负载分子筛臭氧催化氧化染料废水研究现状

Current Status of Research on Ozone-catalytic Oxidation of Dye Wastewater by Composite Component-loaded Molecular Sieves

目前,中国印染废水主要采用二次生化+混凝沉降工艺,使其出水COD质量浓度在300~700 mg·L^(-1)之间,去除率达到75%~85%。然而,该工艺处理后的污水仍然存在着难降解以及有机物残留、COD高等问题,无法满足出水的水质要求。为此,为应对日趋严峻的水体污染形势,持续提升印染企业的排污与用水需求,开展印染废水深度治理,实现污水资源化利用,对于减轻当前水体污染、缓解水资源供需矛盾,均有重要的现实意义。

At present,the secondary biochemical+coagulation sedimentation process is mainly used for printing and dyeing wastewater in China,so that the effluent COD concentration is in the range of 300~700 mg·L^(-1),and the removal rate reaches 75%~85%.However,the wastewater treated by this process still has some problems,such as difficult degradation,organic residue,high COD and so on,which cannot meet the water quality requirements of the effluent.Therefore,in order to cope with the increasingly severe water pollution situation,continuously improve the sewage discharge and water demand of printing and dyeing enterprises,advanced treatment of printing and dyeing wastewater should be carry out to realize the utilization of wastewater as resources,which has important practical significance for alleviating the current water pollution and alleviating the contradiction between supply and demand of water resources.