Center for Applied Research On the Environment and Sustainability (CARES), School of Science and Engineering, The American University, AUC Avenue, P.O. Box 74, Cairo, 11835, New Cairo, Egypt.
UNESCO Chair in Hydrological Changes and Water Resources, RWTH Aachen University, ManagementAachen, Germany.
Environ Sci Pollut Res Int. 2022 Jun;29(30):46226-46242. doi: 10.1007/s11356-022-18701-5. Epub 2022 Feb 15.
This research project aims at investigating the performance of hydroponic nutrient solutions as draw solutions for desalination using the fertilizer drawn forward osmosis (FDFO) process. Six different lettuce and leafy greens hydroponic nutrient stock solutions were prepared according to the literature and used in this study and tested on a bench-scale forward osmosis unit as draw solutions for the process. The feed solution for the process was deionized water mixed with NaCl in different concentrations, to represent different salinities of brackish groundwater. The draw efficiency of each solution was measured based on water flux, specific reverse solute flux, water recovery, and salt rejection. It was concluded that of the six tested nutrient solutions, the "Resh Florida, California" solution is the recommended solution to be used as draw solution for fertilizer drawn forward osmosis, due to its high performance in terms of water recovery (15.75%), flux (11 L/m/h), salt rejection (92%), and SRSF (highest recorded SRSF for a specific ion (SO) was 7.3 g/L), as well as its low cost, relative to the other highly performing draw solution "Chekli" ($1.07/L vs. $3.73/L).
本研究项目旨在研究水培营养液作为肥料汲取正向渗透（FDFO）过程脱盐的汲取液的性能。根据文献，本研究制备了六种不同的生菜和绿叶菜水培营养液原液，并将其用作过程的汲取液，在实验室规模的正向渗透装置上进行了测试。过程的进料溶液是去离子水与不同浓度的 NaCl 混合而成，以代表不同盐度的微咸地下水。根据水通量、特定反向溶质通量、水回收率和盐截留率来测量每种溶液的汲取效率。研究得出，在六种测试的营养液中，“Resh Florida, California”溶液是推荐用作肥料汲取正向渗透的汲取液，因为它在水回收率（15.75%）、通量（11 L/m/h）、盐截留率（92%）和 SRSF（记录到的特定离子（SO）的最高 SRSF 为 7.3 g/L）方面表现出色，同时成本相对较低，与其他高表现汲取液“Chekli”（1.07/L 与 3.73/L）相比。
