稠油采出水处理中试

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—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408.6~526.7 mg/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0.22 m/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2 kg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46.2 mg/L,出水水质满足DB 21/1627—2008《辽宁省污水综合排放标准》。

Pilot test for treatment of heavy oil produced water

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.