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.%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 (GB 8978-1996). 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.
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