关键词: 油库污水, 深度处理, 臭氧催化氧化, 内循环BAF , 中试

Abstract: A pilot-scale study on advanced treatment of sewage from oil depots was carried out by combined process of ozone catalytic oxidation and internal circulation BAF. The ozone dosage and HRT in the ozone catalytic oxidation stage were adjusted to investigate the sewage treatment effect, and the optimum process parameters were determined as follows: ozone dosage=110 mg/L, HRT=2.5 h; the sewage treatment effect under different HRTs of internal circulation BAF was investigated, and the optimum HRT = 3 h was determined. The combined process of ozone catalytic oxidation and internal circulation BAF was used to treat MBR effluent from secondary biochemical stage. Under the condition of influent COD>150 mg/L, the effluent could reach COD<80 mg/L stably and meet the discharge requirements. As a combined advanced wastewater treatment process that sets advanced oxidation and biochemical treatment technology advantages in one, ozone catalytic oxidation combined with internal circulation BAF can be used as a reference process for upgrading the existing sewage treatment plants of water transport oil depots.

Key words: oil depot sewage, advanced treatment, ozone catalytic oxidation, internal circulation BAF, pilot test