in order to make the oily water to the quality of return to oil fieldthe power free oil-water separator which had function of coagulationsedimentation and filtrationwas usedthe coagulant added amount to be optimized based on the test results
为了使含油水达到回油田的质量，采用了具有混凝沉降过滤功能的无动力油水分离器，并根据试验结果对混凝剂的添加量进行了优化
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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