MBR与Fenton组合工艺处理苯酚丙酮废水的研究

STUDY ON THE TREATMENT OF PHENOL/ACETONE WASTEWATER BY COMBINED PROCESS OF MBR AND FENTON

苯酚、丙酮生产装置排放的含酚废水由于具有盐浓度高、有机物浓度高、生物毒性高的特性,是一种成分复杂、较难处理的化工废水。天津莱特化工有限公司根据苯酚丙酮废水的特性筛选驯化得到特效菌种,并且通过MBR与Fenton工艺的组合在天津某化工企业对苯酚丙酮废水成功进行了现场中试。在现场中试基础之上,为了达到企业节水减排的要求,对苯酚丙酮废水处理方案进行了优化,将该化工厂乙烯碱渣湿式氧化后的废水及其它生产废水与苯酚丙酮废水混合后在实验室采用MBR(膜生化反应器)与Fenton组合工艺进行了试验,最终处理后的废水COD小于40 mg/L,氨氮小于2 mg/L,达到地表水环境质量Ⅴ类标准。

The phenolic wastewater discharged from phenol and acetone plant is characterized by high salt concentration,high organic concentration and high biotoxicity. This chemical wastewater has complex composition and is difficult to be treated.According to the characteristics of phenol/acetone wastewater, Littoral Chemical(Tianjin)Co.,Ltd.has obtained special bacteria by screening and domesticating. And through the combination of MBR and Fenton technology,a field test of phenol/acetone wastewater was carried out in a chemical enterprise in Tianjin.On the basis of the field test,the treatment scheme for phenol/acetone wastewater was optimized to achieve the water saving and emission reduction goals of the enterprise.After mixing the phenol/acetone wastewater with the spent caustic wastewater from ethylene plant after wet oxidation and other production wastewater,a test was carried out in the laboratory using the combined process of MBR and Fenton. After treatment,the wastewater COD is less than 40 mg/L and the ammonia nitrogen is less than 2 mg/L,which meet the Grade V environmental quality standard for surface water(GB 3838—2002).