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污染控制技术及原理

The application of a Fenton/SBR process in the treatment of wastewater from Macleaya cordata extraction

摘要：在常温(25℃)条件下,对Fenton与序批式活性污泥法(SBR)组合工艺处理博落回提取废水的特性进行了研究.结果表明,当进水COD_Cr为7300mg·L^-1时,通过多个单因素试验确定的最佳Fenton反应条件为:初始pH=3.0,n(H₂O₂):n(Fe²⁺)=15,H₂O₂投加量为7300mg·L^-1.在此条件下反应120min后,COD_Cr去除率为65.3%,BOD₅/COD_Cr由原水的0.14上升到出水的0.22,可生化性得到提高.同时,研究证明,出水pH不影响COD_Cr去除率,但污泥体积指数(SVI)值随着出水pH的增大而减小.Fenton氧化出水经SBR工艺处理后,COD_Cr可控制在500mg·L^-1以内,达到国家三级排放标准.

Abstract：The characteristics of the treatment process for Macleaya cordata extraction wastewater by using Fenton/SBR (sequencing batch reactor) combined technology were investigated at room temperature. When the COD_Cr concentration in the influent was at 7300 mg·L^-1,the optimal Fenton reaction conditions for the process were determined through single-factor tests to be:initial pH3.0,\[H₂O₂\] to\[Fe²⁺\] molar ratio 15,and H₂O₂ dosage 7300 mg·L^-1. Under those conditions and after 120 min treatment,65.3% COD_Cr removal could be achieved and BOD₅/COD_Cr was increased from 0.14 to 0.22,which showed the biodegradability was improved. F_ollowing treatment by the SBRprocess,the COD_Cr in the effluent could be controlled to less than 500 mg·L^-1 (the third class national discharge standard),which indicated that this combined Fenton/ SBRprocess could be a competitive technology for treating Macleaya cordata extraction wastewater.