Abstract: Na₂S₂O₈/H₂O₂ coupled advanced oxidation system has been used for treating the biochemical tail water of landfill leachate,applying FeSO₄ as the activator. The influences of the dosages of FeSO₄·7H₂O,Na₂S₂O₈,H₂O₂ etc. on COD_Cr removing rate have been investigated in aid of response surface method and Box-Behnken design. The results show that the removing effect of Fe²⁺ on COD_Cr is remarkable. There is obvious cross-impact between Na₂S₂O₈ and H₂O₂, and Na₂S₂O₈/H₂O₂ system brings about synergistic effect,which increases COD_Cr removing rate effectively. Under the following conditions:the dosages of FeSO₄·7H₂O,Na₂S₂O₈ and H₂O₂ are 2 g/L,1.75 g/L,and 3 mL/L,respectively,the leachate tail water COD_Cr removing rate is above 70%.

Key words: leachate, biochemical tail water, advanced oxidation, advanced treatment, response surface method

摘要： 以FeSO₄为活化剂，采用Na₂S₂O₈/H₂O₂耦合高级氧化体系处理垃圾渗滤液生化尾水。借助响应面法Box-Behnken设计分析FeSO₄·7H₂O、Na₂S₂O₈、H₂O₂投加量等因素对COD_Cr去除率的影响。研究结果显示：Fe²⁺对COD_Cr去除效果影响显著，Na₂S₂O₈与H₂O₂两者之间有显著的交互影响，Na₂S₂O₈/H₂O₂体系产生协同效应，有效提高了COD_Cr去除率。在FeSO₄·7H₂O投加量为2 g/L，Na₂S₂O₈投加量为1.75 g/L，H₂O₂投加量为3 mL/L的条件下，渗滤液尾水COD_Cr去除率达到70%以上。

关键词: 渗滤液, 生化尾水, 高级氧化, 深度处理, 响应面法

CLC Number: 

• X703