印染工业用水量大，通常每印染加工1t纺织品耗水100一200t.其中80%一90%以印染废水排出。常用的治理方法有回收利用和无害化处理。 The printing and dyeing industry USES large amount of water, and usually each printing and dyeing processing 1t textile consumes 100 200 t. Of which 80% of it is discharged by dyeing wastewater. Common management methods are recycled and harmless. 　　回收利用：(1)废水可按水质特点分别回收利用，如漂白煮炼废水和染色印花废水的分流，前者可以对流洗涤.一水多用，减少排放量;(2)碱液回收利用，通常采用蒸发法回收，如碱液量大，可用三效蒸发回收，碱液量小，可用薄膜蒸发回收;(3)染料回收.如士林染料可酸化成为隐巴酸，呈胶体微粒.悬浮于残液中，经沉淀过滤后回收利用。 Recycling: (1) the wastewater can be recycled separately according to the water quality characteristics, such as scouring bleaching wastewater and dye printing wastewater, the former can convection washing. Multi-purpose monohydrate, reducing emissions; (2) the use of lye is usually recovered by evaporative method, such as large amount of lye, which can be recovered by evaporation, the amount of lye is small, and the film can be recovered from evaporation. (3) the dye is recovered. For example, the shilin dye can be acidified into cryptobaric acid, which is in the form of colloidal particles.