With the structural modification of quartz sand filter in Daqing oil field, and using the suspended sludge filtration in treating oilfield wastewater, the good experimental results are obtained.

对大庆油田石英砂过滤器结构进行改造，并应用悬浮污泥过滤技术对油田污水进行了深度处理，试验取得了良好的处理效果。

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Different methods are described to measure sludge sedimentation and filtration properties, by use of sedimentation indices, initial sedimentation velocity and capillary suction time.

利用沉积作用，最初的沉积作用速度和吸附时间，描述测量烂泥沉积作用和过滤产物的不同方法。

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The investigation reviewed the influence of flocculants to sludge with oil and the factor influenced the sludge flocculation filtration. The best running condition is confirmed through experiment.

本研究主要考察了絮凝剂对含油污泥的过滤性能的影响，以及影响污泥絮凝过滤的各种因素，并通过实验确定了污泥的最佳絮凝的运行条件。

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