反渗透（RO）膜技术的快速发展导致了 许多新膜产品的开发。本研究进行了初步试验 在两种新的反渗透膜上，确定旧一代反渗透膜的改进 膜。本文介绍了在这些新设备上进行的初步试验结果 一代用于地下水脱盐的低压微咸水反渗透膜。 测试了两种新膜——Hydranautics，Inc.生产的ESPA 4， 加利福尼亚州Oceanside和韩国Saehan Industries制造的RE 4040 BL。 第一阶段测试包括对旧一代膜（ESPA 2）的初步测试 （液压）以建立基线。发现新一代膜 操作压力比旧一代膜低20-30%。 新一代膜的盐截留率降低了0.7-1.8%。 在这一阶段，发现两种新一代膜中的RE 4040BL 与ESPA 4相比，膜的工作压力略低，截留率较高 它被选为第二阶段的测试。在测试的第二阶段 RE 4040BL膜在20 gfd的通量下运行，回收率在75%之间 90%来观察这些腐蚀性操作条件对污垢的影响 膜的行为。在这些条件下，未观察到明显的污垢。 对这两种新一代膜进行了模型模拟，并给出了模拟结果 本文介绍了这些方法。此外，还提出了资本和运营成本估算 新一代膜与旧一代膜的比较 目前正在运营4 mgd工厂。包括表格、数字。

The rapid development in reverse osmosis (RO) membrane technology has led to the development of many new membrane products. In this study pilot tests were conducted on two new RO membranes to determine the improvement from the older generation RO membranes. This paper presents the results of pilot testing conducted on these new generation low pressure brackish water RO membranes for groundwater desalination. Two new membranes were tested - ESPA 4 manufactured by Hydranautics, Inc, Oceanside, California and RE 4040 BL manufactured by Saehan Industries, South Korea. Phase I testing included pilot testing an older generation membrane (ESPA 2 from Hydranautics) to establish a baseline. It was found that the new generation membranes operated at a lower operating pressure than the older generation membrane by 20-30%. The salt rejections were lower for the new generation membranes by 0.7-1.8%. During this phase it was found that of the two new generation membranes the RE 4040BL membrane had a slightly lower operating pressure and higher rejection than the ESPA 4 and it was selected for Phase II of the testing. During the second phase of the testing the RE 4040BL membrane was operated at a flux of 20 gfd and at recoveries between 75% and 90% to observe the effect of these aggressive operating conditions on the fouling behavior of the membrane. No significant fouling was observed under these conditions. Model simulations on both the new generation membranes were performed and results are presented in this paper. Also capital and operating cost estimates have been presented comparing the new generation membrane with the older generation membrane for a currently operating 4 mgd plant. Includes tables, figures.