本试验采用膜生物反应器（Membrane bioreactor，MBR）对石化废水进行处理，在300L/h、150L/h及75L/h三个曝气量下，研究跨膜压差及单周期跨膜压差变化率（K）的变化特征。试验结果表明：跨膜压差呈指数型曲线变化，跨膜压差与运行时间的关系式为： 。不同曝气量下，单周期跨膜压差变化率K的变化范围为0-2.5Pa/s，曝气量的改变并不能改变K值增大的趋势。但是，曝气量对K值变化特征有影响，在提高曝气量的条件下，K上升的速率较缓。可依据单周期跨膜压差变化率K的变化趋势，对膜生物反应器的曝气进行过程控制，并同步减缓膜污染的进程。

 Submerged membrane bioreactor (MBR) was employed for petrochemical industry wastewater treatment. Transmerbrane pressure (TMP) and the TMP increasing rate (K) have been investigated under different aeration rates (300L/h, 150L/h and 75L/h). The result indicated that the evolution of TMP followed a simple exponential relationship with filtration time, i.e.  . K varied from 0 to 2.5 Pa/s under different aeration conditions. Change of aeration intensities presented insignificantly impact on the rising tendency of the K value. However, the aeration rates can change the characteristics of K increasing rate. The higher aeration rate can result in the slower increase of K. The result indicated that K could be potentially used to optimize the aeration in MBR and thus reducing the membrane fouling of MBR.

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