摘要：

对蜡染印花生产废水处理与综合利用工程进行技术改造。分流后的机械洗蜡废水经双级气浮处理，蜡回收率和废水回用率可达90%以上；皂化脱蜡废水经酸化—气浮处理，蜡回收率可达92%以上。混合废水经混凝沉淀—生物接触氧化—气浮组合工艺处理后，出水达标排放。该处理工艺处理费用低，经济效益和环境效益显著。

关键词: 蜡染印花, 废水处理, 蜡回收, 生物接触氧化, 气浮

Abstract:

The technology of the treatment and comprehensive utilization of the wastewater from wax printing production has been studied and applied to the practical engineering. The results show that when the split flow containing wax by mechanical action is treated by the double air flotation, the reuse rate of the wastewater and the recovery of the wax in the wastewater are all over 90%, and when the split flowcontaining wax by saponification is treated by acidification and the air flotation, the recovery of the wax in the wastewater is over 92%. When the mixing wastewater is treated by the coagulation-sedimentation, biological contact oxidation and air flotation process, the effluent quality can meet requirement of the National Sewage Discharge Standards. This process has many advantages such as lowcost, obvious economic benefit and high environmental benefit.

Key words: wax printing, wastewater treatment, recovery of wax, biological contact oxidation, air flotation

中图分类号: 

• X703.1