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为了解决炼油厂用水量大 ,水资源短缺的问题 ,采用活性炭深度处理生化处理水使其回用为循环冷却水补充水 ,以减少新鲜水用量。活性炭优良的吸附性能及其表面所形成的微生物膜 ,对炼油厂废水中的污染物质有良好的去除作用。实验采用活性炭吸附为主、砂滤为辅 ,过滤处理生化处理后出水 ,考查了以吸附法处理使水质主要指标达到循环冷却水补充水的可行性。结果表明 :活性炭吸附法辅以砂滤对炼油厂生化处理后出水中的COD、浊度、色度、挥发酚、总磷的吸附性能良好 ,对电导率、pH值有一定的调节作用 ,使废水中主要的水质指标达到循环冷却水补充水的水质要求。当处理后的出水中加适量的缓蚀阻垢剂、杀菌灭藻剂时 ,可使腐蚀速率、异养菌、铁细菌和硫酸盐还原菌等指标达到循环冷却水补充水的防腐蚀标准。当活性炭饱和时 ,利用臭氧再生活性炭 ,再生后活性炭的性能仍保持良好 ,此法具有再生工艺简单 ,再生效率高等优点。
In order to solve the problem of large amount of water and shortage of water resources in oil refineries, deep treatment of biochemical treated water with activated carbon is used to replenish recirculating cooling water to reduce fresh water consumption. Activated carbon adsorption performance and the surface of the formation of microbial membranes, refinery wastewater pollutants have a good removal effect. Activated carbon adsorption was the main method of experiment, supplemented by sand filtration. After filtration treatment, the effluent was treated by biochemical treatment. The feasibility of using adsorption method to make the main indexes of water quality meet the circulating cooling water replenishment was investigated. The results showed that activated carbon adsorption followed by sand filtration had good adsorption capacity of COD, turbidity, chroma, volatile phenol and total phosphorus in effluent from biochemical treatment of refinery, and had certain regulation on conductivity and pH The main water quality indicators in the wastewater meet the water quality requirements of the recirculating cooling water replenishment water. Corrosion rate, heterotrophic bacteria, iron bacteria and sulfate-reducing bacteria and other indicators can reach the anti-corrosion standard of the circulating cooling water make-up water when the treated effluent is treated with appropriate amount of corrosion and scale inhibitor and bactericidal algicide. When the activated carbon is saturated, the performance of activated carbon after regeneration is still good by utilizing activated carbon regenerated by ozone. This method has the advantages of simple regeneration process and high regeneration efficiency.