Abstract: Some methods of treating printing and dyeing wastewater are compared in this paper. The reaction mechanism,technological process, treatment effect and economic loss/benefit analysis of treating printing and dyeing wastewater by co－agulation - ClO₂ method are introduced.The application of it shows:this process is simple in technology, convenient in operation, low in cost, high in efficiency and has wide applicable future.

Key words: coagulation-ClO₂ method, printing and dyeing wastewater.

摘要： 比较了印染废水处理的几种常用方法，介绍了混凝-二氧化氯组合法处理印染废水的反应机理、工艺流程、处理效果及经济效益分析。应用表明：该法工艺简单、操作方便、投资少、效果好，具有广阔的推广应用前景。

关键词: 混凝—二氧化氯组合法, 印染废水, 生化法