摘要：

采用调节—混凝—沉淀组合工艺处理某机械公司酸洗废水。该工程处理水量为30 t/d，当进水的总磷、总铁、Zn²⁺平均质量浓度分别为33.3、230.0、44.0 mg/L 时， 该工艺对总磷、总铁、Zn²⁺的平均去除率分别为99.9%、99.0%、97.7%，出水水质达到《污水综合排放标准》（GB 8978—1996）中的一级排放标准，工艺运行费用为0.80 元/t。调节—混凝—沉淀组合工艺适于处理小型机械厂内部的酸洗废水。

关键词: 酸洗废水, 混凝, 沉淀

Abstract:

The combined adjustment—coagulation—sedimentation process has been used for treating the pickling wastewater in a machinery company. The water treatment capacity of this project is 30 t/d. The average mass concentration of total phosphorus，total iron and Zn²⁺ in influent water are 33.3 mg/L，230.0 mg/L，44.0 mg/L，respectively. The processing results show that the average removing rates of total phosphorus，total iron and Zn²⁺ are 99.9% ，99.0% ，97.7% respectively，achieving the first class of Integrated Wastewater Discharge Standard （GB8978—1996）. The process operation cost is CNY 0.80/t. The combined adjustment—coagulation—sedimentation process is suitable for treating internal pickling wastewater in small-scale machinery plants.

Key words: pickling wastewater, coagulation, sedimentation

中图分类号: 

• X703