Oilfield Produced Water Treatment by Ozone-Enhanced Flocculation
Oilfield Produced Water Treatment by Ozone-Enhanced Flocculation
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DOI：
10.1109/cdciem.2011.515
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发表时间：
2011-02
期刊：
影响因子：
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通讯作者：
Lihua Cheng;X. Bi;Y. Ni
中科院分区：
文献类型：
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作者：
Lihua Cheng;X. Bi;Y. Ni
由于油田采出水处理难度大，混凝技术处理效率低。因此，需要一种更有效的处理技术。为开发油田采出水处理的新方法，开展了臭氧强化混凝处理油田采出水的研究。结果表明，投加臭氧可以减少混凝剂（PAC）和絮凝剂（PAM）的投加量，达到相同的污染物去除率，从而降低运行成本。pH值影响油和SS的去除。酸性环境有利于污染物的去除，最佳温度为50 ℃。在反应池中添加接触填料可以提高臭氧的利用率，颗粒活性炭是本研究中最佳的填料。氧气的存在会加快腐蚀速度，Na 2S 2 O3可以用来去除臭氧氧化产生的残余氧气。当Na_2S_2O_3投加量为40 mg/L，反应时间为20 min时，出水含氧量可达0.5mg/L以下。综上所述，臭氧具有强化混凝的作用，臭氧强化混凝技术可用于油田采出水的处理。
Due to the difficulty of oilfield produced water treatment and low efficiency of coagulation technology. A more efficient treatment technology was necessity. Produced water treatment by ozone enhanced coagulation was investigated in this study in order to develop a new method for oilfield produced water treatment. The results showed that addition of ozone could reduce the dosage of coagulant (PAC) and flocculant (PAM) to get the same pollutant removal rate, resulting in lower running cost. pH could affect oil and SS removal. Acid circumstance was helpful to pollutant removal and the optimal temperature was 50 ¡æ. Addition of contact filler to the reaction tank could improve ozone utilization and granular activated carbon was the best packing material in this research. Presence of oxygen could increase corrosion speed and Na2S2O3 could be used to remove residual oxygen generated from theozonation. When Na2S2O3 dosage was 40mg/L and the reaction time was 20min, oxygen content in the effluent could below 0.5mg/L. In summary, ozone could enhance coagulation and the ozone enhanced coagulation technology could be used to treat oilfield produced water.