PFS混凝组合Ca（ClO）2氧化深度处理焦化废水实验研究

摘要

Polyferric sulfate coagulation combined with calcium hypochlorite oxidation has been used for the advanced treatment of coking wastewater. By means of single factor experiments ,the optimum technological conditions are de-termined as follows:without pH adjustment,the polyferric sulfate dosage is 1.4 mL/L,calcium hypochlorite dosage 0.8 mg/L and oxidation reaction time 30 min. Under these conditions ,the treated effluent COD is 78 mg/L ,and the turbidity less than 1 NTU. The results of the ultraviolet absorption spectrum show that the concentration of organic substances in wastewater is obviously decreased. The combined process provides a new way for the advanced treat-ment of coking wastewater with low cost.%采用聚合硫酸铁（PFS）混凝组合次氯酸钙〔Ca（ClO）2〕氧化对焦化废水进行深度处理。通过单因素实验确定了最佳工艺条件：不调节废水pH，PFS投加量1．4 mL/L，Ca（ClO）2投加量0．8 mg/L，氧化反应时间30 min，在此条件下，处理后出水COD为78 mg/L，浊度在1 NTU以下。紫外吸收光谱分析结果表明，废水中有机物浓度有了明显降低。该组合工艺为开发低成本焦化废水深度处理工艺提供了新途径。