稠油采出水处理中试

Pilot test for treatment of heavy oil produced water

以活性焦为吸附剂，采用预吸附-水解酸化-曝气生物固定床滤池一后吸附组合工艺中试处理稠油采出水。试验结果表明，当预吸附进水COD为408．6-526．7mg／L、预吸附池活性焦泥回流量为25％（W）、水解酸化池上升流速为0．22m／h、曝气生物固定床滤池气水体积比为10：1、后吸附池投加新活性焦2kg时，组合工艺对稠油采出水COD的去除率达到90．0％，出水COD均值为46．2mg／L，出水水质满足DB21／1627-2008《辽宁省污水综合排放标准》。

Using activated coke as adsorbent, a pilot test for treatment of heavy oil produced water was carried out by the combination process of pre-adsorption-hydrolysis acidification-fixed-bed biological aerated filtration-post- adsorption. The test results show that when the influent COD of the pre-adsorption is 408.6-526.7 mg/L, the return flows of activated coke for the pre-adsorption tank is 25%, the up-flow velocity of the hydrolysis acidification tank is 0.22 m/h, the air-water ratio of the fixed-bed biological aerated filter is 10 ： 1 and the dosage of activated coke in the post-adsorption tank is 2 kg, the COD removal rate of the heavy oil produced water reaches 90.0%, and the average of effluent COD is 46.2 mg/L, which meets the Liaoning integrated wastewater discharge standard of DB21/1627-2008.