摘要：

讨论了在纺织印染污水处理中FeSO₄絮凝污泥的回流脱色可行性。污泥回用的工艺为二级脱色, 即首先用回流的污泥对印染污水进行脱色, 污泥沉淀后排出系统。然后再用新鲜的FeSO₄溶液进一步脱色, 形成的污泥回流至第一脱色阶段。该工艺的优点是可以大幅度减少新鲜FeSO₄的用量, 继而减少污泥总量。

关键词: 印染废水, FeSO₄, 污泥回用

Abstract:

The reflux decolorization feasibility on the FeSO₄ flocculation sludge in the treatment of textile printing&dyeing wastewater has been discussed. The process of sludge reuse is conducted in two-stage decolorization. It means that the printing&dyeing wastewater is firstly decolored with refluxed sludge, and, after the sludge is precipitated, is discharged from the system. Then the wastewater is further discolored with fresh FeSO₄ solution, and the formedsludge in second stage will be refluxed to the first stage. The advantages of such a process are that it will reduce theconsumption of fresh FeSO₄ and, as a result, reduce the total quantity of sludge.

Key words: printing&dyeing wastewater, FeSO₄, sludge reuse

中图分类号: 

• X703.1