响应面法优化O3/H2O2组合工艺处理制浆中段废水的研究

Study on the Optimization of Combined O3/H2O2 Process for the Treatment of Middle-stage Pulping Wastewater by Response Surface Methodology

关键词:  臭氧  过氧化氢  高级氧化处理  响应面  制浆中段废水

Key Words:O₃  H₂O₂  advanced oxidation treatment  response surface  middle-stage pulping wastewater

摘要:本研究为提高臭氧（O₃）氧化处理制浆中段废水的COD去除率，以广西某造纸厂制浆中段废水为研究对象，采用O₃/H₂O₂组合工艺对其进行高级氧化处理。分别探究了废水初始pH值、O₃用量、H₂O₂用量、反应时间和搅拌速度等影响因素对废水色度和COD去除效果的影响。为提高最优工艺参数的精确度，对O₃/H₂O₂组合工艺参数进行响应面优化法分析。结果表明，在废水初始pH值=8、H₂O₂用量为1.0 mL/L、O₃用量为480 mg/L的工艺条件下，废水色度为85.7倍，色度去除率为99.3%；COD_Cr达208.2 mg/L，COD_Cr去除率为84.5%。

Abstract:In this study， in order to improve the COD removal rate of ozone （O₃） oxidation treatment of middle-stage pulping wastewater， a combined O₃/H₂O₂ process was used for advanced oxidation treatment of middle-stage pulping wastewater from a paper mill in Guangxi. The effects of the initial pH value， O₃ dosage， H₂O₂ dosage， reaction time， and stirring speed on the removal of colority and COD were investigated. To improve the accuracy of the optimal process parameters， the combined O₃/H₂O₂ process parameters were analyzed by response surface optimization method. The results showed that under the process conditions of inital pH value=8， H₂O₂ dosage 1.0 mL/L， and O₃ dosage 480 mg/L， the wastewater colority was 85.7 with removal rate of 99.3% and COD_Cr reached 208.2 mg/L with removal rate of 84.5%.