Abstract:

The effluent from the secondary sedimentation tank of the wastewater treatment plant of a liquor production enterprise in Guizhou was taken as the research object. Zero-valent iron（Fe⁰） activated persulfate（S₂O₈ ^2-，PS） advanced oxidation method was used to further treat the effluent，and the process conditions were optimized. The effects of initial pH，PS dosage and molar ratio of Fe⁰ to PS on the treatment effect of liquor wastewater were investigated by single factor experiment，and the process conditions were further optimized by response surface method. The results show that persulfate process can effectively reduce the organic content of liquor wastewater. The optimal process conditions are as follows：initial pH is 4.08，The PS dosage was 1.39 times the theoretical dosage （1 mg/L COD complete oxidation theoretically requires 12 mg/L PS），n（Fe⁰）∶n（PS）=1.27. Under these conditions，the COD removal rate of liquor wastewater reaches 70.33%.

Key words: persulfate, liquor wastewater, process optimization, response surface method

摘要：

以贵州省仁怀市某白酒废水处理厂二沉池出水为研究对象，采用零价铁（Fe⁰）活化过硫酸盐（S₂O₈ ^2-，PS）的高级氧化法对其深度处理，并进行工艺条件的优化。通过单因素实验考察了溶液初始pH、PS投加量、n（Fe⁰）∶n（PS）对白酒废水处理效果的影响，并采用响应面法进行优化验证。结果表明，过硫酸盐法可以有效地降低白酒废水的有机物浓度，优化工艺条件：溶液初始pH为4.08，PS投加量为理论投加量（1 mg/L COD完全氧化理论上需要12 mg/L PS）的1.39倍，n（Fe⁰）∶n（PS）=1.27。在此条件下，白酒废水的COD去除率达70.33%。

关键词: 过硫酸盐, 白酒废水, 工艺优化, 响应面法

CLC Number: 

• X703