Treatment of Oil Field Wastewater after Chemical Flooding by Fenton Oxidation Combined with Bio- degradation

• 作者: Chen Qingguo Liu Mei
• 来源期刊: 气象与环境研究：英文版
• 学科: 地球科学
• 关键词: 油田废水 生物降解法 氧化法 有机化合物 生物降解性 CODCR 最佳操作条件 好氧活性污泥
• 年，卷（期）: 2015,（3）
• 页码范围: 37-40
• 页数: 4页
• 分类号: X741

摘要

Wastewater after chemical flooding is difficult to be treated by biological methods due to the residual chemicals in the wastewater.Fenton oxidation,which has been widely applied to detoxifying hazardous organic compounds and improving the biodegradability of these compounds,can solve this problem.So,in this paper,Fenton oxidation was used to enhance the biodegradability of the wastewater after chemical flooding.The optimum operating conditions for the Fenton oxidation process were 2.5 g/L Fe2+,600 mg/L H2O2and 30 min of treatment time.The wastewater pretreated by Fenton oxidation was treated by aerobic activated sludge.It was found that a small amount of H2O2can significantly increase both the biodegradation rate and extent of the wastewater.The effluent CODCrand HPAM contents were 260 and 94 mg/L respectively after the aerobic biological process with the biodegradation time of 24 h.After Fenton oxidation combining with biodegradation,the total CODCrremoval efficiency was up to 90%,and polymer and oil degrading efficiencies were 95%and 92%respectively.