中和助凝法处理含铁煤矿酸性废水研究
Study on Treatment of Acidic Wastewater from Iron-Bearing Coal Mines by Neutralization and Coagulation Aid Method
摘要:
针对含铁煤矿酸性废水，采用中和助凝法去除其中的铁离子及SS。理论分析了溶液的pH值、水温及助凝剂量跟铁离子及SS去除率之间的关系。通过实验研究了pH值、水温及助凝剂量的最佳值。实验表明，在温度在18℃~25℃之间，pH值在7~8之间，PAM投加量在5 mg/L附近，对于铁离子及SS去除率较好。
Abstract:
Aiming at acid wastewater from iron-containing coal mines, neutralization Coagulation-aid method was used for the removal of iron ions and SS. The relationship between the pH value, water temperature and coagulation dose of the solution and the removal rate of iron ion and SS was an-alyzed theoretically. The optimum values of pH value, water temperature and coagulation aid dose were studied through experiments. The results show that the removal rate of iron ion and SS is better when the temperature is between 18˚C - 25˚C, the pH value is between 7 and 8, and the dos-age of PAM is around 5 mg/L.
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