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首页> 外文期刊>Petroleum Science and Technology >Remediation of Oilfield Wastewater Produced From Alkaline/Surfactant/Polymer Flooding by Using a Combination of Coagulation and Bioaugmentation
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Remediation of Oilfield Wastewater Produced From Alkaline/Surfactant/Polymer Flooding by Using a Combination of Coagulation and Bioaugmentation

机译：混凝与生物强化相结合修复碱/表面活性剂/聚合物驱油田油田废水

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摘要

In this study, performance of a full-scale combined treatment plant for oilfield wastewater from alkaline/surfactant/polymer flooding was investigated. The combined process consisted of chemical coagulation, hydrolysis/acidification, and bio-contact oxidation. The experimental results demonstrated that chemical coagulation treatment with polymeric ferric sulfate proved to be the most effective in removing the chemical oxygen demand (>80%) from the wastewater under the dosage of 600mg/m(3). The highest acidification efficiency in hydrolysis acidification tank was 25.8% at hydraulic retention time of 20h. The average values of chemical oxygen demand, biochemical oxygen demand, oil, and NH3-N of the combined process could be reduced to 116, 19, 4, 11, and 20mg/L, respectively. The final effluent could meet the class II national wastewater discharge standard of petrochemical industry of China.
机译：在这项研究中，研究了用于碱/表面活性剂/聚合物驱的油田污水全规模联合处理厂的性能。合并过程包括化学混凝，水解/酸化和生物接触氧化。实验结果表明，用聚合硫酸铁进行化学混凝处理是去除600mg / m3废水中化学需氧量（> 80％）最有效的方法。在水力停留时间为20h时，水解酸化槽中的最高酸化效率为25.8％。组合过程的化学需氧量，生化需氧量，油和NH3-N的平均值可以分别降至116、19、4、11和20mg / L。最终出水可达到中国石化行业国家二级排放标准。

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