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首页> 外文会议>Annual Meeting of the North American Membrane Society >Effect of Operational Mode (Constant Flux or Constant Transmembrane Pressure) and Surface Modification On Oil/Water Emulsion Fouling Behavior of Polysulfone Ultrafiltration Membranes
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Effect of Operational Mode (Constant Flux or Constant Transmembrane Pressure) and Surface Modification On Oil/Water Emulsion Fouling Behavior of Polysulfone Ultrafiltration Membranes

机译：运算模式（恒定通量或恒定跨膜压力）的影响和表面改性对多砜超滤膜的油/水乳液污垢行为

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Two methods of operating water filtration membrane systems are: (1) maintaining constant permeate flux by controlling transmembrane pressure (TMP) difference or (2) maintaining constant TMP and obtaining the permeate flux associated with that TMP. Many literature studies of fouling of water purification membranes report data from constant TMP experiments, and industrial filtration systems often operate at constant flux. To explore the similarities and differences between operation at constant flux and constant TMP, this poster presentation shows a comparison of constant-flux and constant-TMP operation of flat-sheet polysulfone ultrafiltration membranes during oil/water emulsion filtration. For a given set of experimental conditions, the critical flux was determined using a flux-stepping method in constant flux crossflow filtration. The membrane performance during fouling tests in both constant flux and constant TMP experiments was investigated at fluxes higher and lower than the critical flux. Membrane resistance as a function of time and as a function of permeate volume during fouling were compared for constant flux and constant TMP operation. At fluxes lower than the critical flux, the membrane resistance during constant flux and constant TMP fouling were similar. At fluxes higher than the critical flux, the membrane resistances differed for the two operating modes, in some cases by more than an order of magnitude. Possible reasons for similarities and differences in membrane behavior for each mode of operation will be discussed.
机译：操作水过滤膜系统的两种方法是：（1）通过控制跨膜压力（TMP）差异或保持恒定TMP并获得与该TMP相关的渗透通量来保持恒定的渗透助焊剂。许多污水净化膜结垢的文献研究报告了来自恒定TMP实验的数据，工业过滤系统经常在恒定的助焊剂处运行。为了探讨在恒定通量和恒定TMP处的操作之间的相似性和差异，该海报呈现表明，在油/水乳液过滤期间平板多砜超滤膜的恒定通量和恒定TMP操作的比较。对于给定的一组实验条件，使用恒定通量横流过滤中的助熔剂方法测定临界通量。在恒定通量和恒定TMP实验中进行污垢试验期间的膜性能在较高且低于临界通量的助条件下研究。与恒定通量和恒定TMP操作进行比较膜抗函数并且作为渗透过程中的渗透体积的函数。在低于临界通量的助熔剂，恒定通量和恒定TMP污垢期间的膜抗性相似。在高于临界通量的助熔剂时，膜电阻对于两个操作模式不同，在某些情况下，在某些情况下超过一个数量级。将讨论每种操作模式的膜行为的相似性和差异的可能原因。

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