炼油碱性污水生物氧化预处理影响因素研究

摘要

炼油碱性污水是石油炼制过程中产生的一种含有大量硫化物、酚类和石油类等污染物的高浓度碱性污水.采用循环式生物曝气滤池工艺(CBAF)对炼油碱性污水进行了预处理试验.研究了不同HRT、溶解氧、温度、反冲洗方式和周期等对污水中硫化物、挥发酚、COD去除率的影响.结果表明,在适宜操作条件下,其对炼油碱性污水主要污染物指标COD、硫化物、酚类平均去除率分别达到80.0%、99.1%、87.3%.%The alkaline wastewater from oil refinery is a kind of highly concentrated alkaline wastewater, which contains a lot of pollutants, such as sulphide, volatile phenol and oil pollutants. A biological oxidation technology of circulating biological aerated filter(CBAF) has been used for pretreating the alkaline wastewater. The effect of various factors such as hydraulic resident time, dissolved oxygen concentration, temperature, backwashing period and fashion on the removal of sulphide, volatile phenol, COD are investigated. The experimental results show that the average removal rate of COD, sulphide and volatile phenol are 80.0%, 99.1% and 87.3%, respectively under feasible conditions.