The present work aims to explore the impact of different operating parameters on the performance of a reverse osmosis desalination unit having a thin film composite membrane type. Three parameters are studied: the feed stream flow rate (1-2.75 L/min), salt concentration of the feed stream [3250-4250 parts per million (ppm)], and feed temperature (29-35° C). For all of the feed stream salt concentrations, the results revealed that as the feed flow rate increased the membrane feed pressure and recovery ratio (RR) decreased. Also, as the feed flow rate increased up to 1.75 L/min the permeate salinity decreased and the salt rejection ratio (SRR) and permeate flow rate increased. Furthermore, for feed stream flow rates above 1.75 L/min the permeate salinity increased while the SRR and permeate flow rate decreased. The results depict that an increase in feedwater salinity causes a reduction in the permeate flow rate and RR and an increase in the permeate salinity. Additionally, the increase in feed salinity from 3250 to 3750 ppm resulted in the SRR decreasing from 88% to 86%. Also, an increase in the feed temperature led to a noticeable increase in the permeate salinity, a slight increase in the permeate flow rate, a gradual decrease in the SRR, and an insignificant increase in the RR.

中文翻译：

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薄膜复合材料（TFC）膜对反渗透性能影响的实验研究

本工作旨在探索不同操作参数对具有薄膜复合膜类型的反渗透淡化装置性能的影响。研究了三个参数：进料流流速（1-2.75 L / min），进料流的盐浓度[3250-4250百万分之一（ppm）]和进料温度（29-35°C）。对于所有进料流盐浓度，结果显示随着进料流速的增加，膜进料压力和回收率（RR）降低。另外，随着进料流量增加到1.75 L / min，渗透盐度降低，脱盐率（SRR）和渗透流量增加。此外，对于进料流流速高于1.75 L / min，渗透盐度增加，而SRR和渗透流速降低。结果表明，给水盐度的增加导致渗透物流速和RR的降低，以及渗透物盐度的增加。此外，饲料盐度从3250 ppm增加到3750 ppm，导致SRR从88％降低到86％。而且，进料温度的升高导致渗透盐度的显着增加，渗透物流速的略微增加，SRR的逐渐降低以及RR的显着增加。