水解酸化/生物接触氧化工艺处理舰船油污废水

Treatment of Naval Vessel Oil-bearing Wastewater by Hydrolysis Acidification/Biological Contact Oxidation Process

以经隔油处理后的舰船油污废水为研究对象,采用水解酸化/生物接触氧化工艺对其进行处理,考察处理效果及其影响因素。结果表明,采用水解酸化/生物接触氧化工艺处理舰船油污废水是可行的,当进水盐浓度为25 g/L、COD为550～600 mg/L、油类为25～30 mg/L、水温为25～30℃、HRT为18 h时,系统对COD和油类的去除率分别可达93%和96%,出水COD和油类浓度均达到排放要求。水解酸化工艺可有效提高油污废水的可生化性,其最佳停留时间为10 h;水温降低会使系统的处理效果下降;系统的耐盐冲击能力较强,低盐度冲击对系统处理效果的影响要比高盐度冲击的小。

The combined process of hydrolysis acidification and biological contact oxidation was used to treat naval vessel oil-bearing wastewater after oil separation, and the treatment efficiency and influencing factors were investigated. The results show the treatment of naval vessel oil-bearing wastewater by the combined process is feasible. When the influent salt concentration is 25 g/L, COD is 550 to 600 mg/L, oil is 25 to 30 mg/L, water temperature is 25 to 30 ℃ and HRT is 18 h, the total removal rates of COD and oil are 93% and 96% , and the effluent COD and oil contents are able to meet the discharge standard. The hydrolysis acidification process can improve the biodegradability of oil-bearing wastewater, and its optimal HRT is 10 h. The treatment effect can reduce when water temperature drops. The combined process has high salinity tolerance, and the impact of low salinity on the combined process is less than the impact of high salinity.