The current study applied the forward osmosis (FO) based osmotic concentration (OC) process at the pilot-scale for concentrating synthetic feed solution (FS). The process water (PW) salinity represents effluents from the gas industry, while the draw solution (DS) mimics seawater. Besides, the performance of a hollow fiber (HF) membrane manufactured from polyamide thin film composite (PA-TFC) was evaluated. The effect of operation with various feed recovery rates, flowrates and temperatures on the OC performance was examined. Outcomes reveal that the tested membrane succeeded in recovering up to 90% of FS at water flux of 6.40 LMH. The stability of OC plant was successfully demonstrated for 48 hours long-term run at 75% feed recovery as an optimum condition, where the TFC membrane achieved average water flux of 6.00 LMH, respectively. Higher DS flowrate improved the OC performance by inducing higher water permeation and FS recovery; however, it increased the undesirable reverse solute diffusion. Lastly, the permeability coefficient of the HF membrane was estimated by 2.69 LMH/bar at 25 °C, which significantly enhanced at higher temperatures.

目前的研究在中试规模上应用了基于正渗透 (FO) 的渗透浓缩 (OC) 工艺来浓缩合成进料溶液 (FS)。工艺水 (PW) 盐度代表来自天然气工业的流出物，而汲取溶液 (DS) 模拟海水。此外，还评估了由聚酰胺薄膜复合材料 (PA-TFC) 制成的中空纤维 (HF) 膜的性能。检查了在不同进料回收率、流速和温度下操作对 OC 性能的影响。结果表明，在 6.40 LMH 的水通量下，所测试的膜成功地回收了高达 90% 的 FS。在 75% 的进料回收率下长期运行 48 小时作为最佳条件成功证明了 OC 装置的稳定性，其中 TFC 膜分别实现了 6.00 LMH 的平均水通量。更高的 DS 流量通过诱导更高的水渗透和 FS 回收来改善 OC 性能；然而，它增加了不希望的逆向溶质扩散。最后，HF 膜的渗透系数在 25 °C 时估计为 2.69 LMH/bar，在较高温度下显着增强。