Reverse solute flux (RSF) is a key issue for operating forward osmosis (FO) systems and can cause the loss of draw solute (DS) and salt accumulation in the feed. Herein, an electrolysis-assisted FO (e-FO) system was developed for simultaneous RSF reduction and recovery of the reverse-fluxed DS. Applying a voltage of 1.5 V led to RSF of 3.34 ± 0.01 mmol m⁻² h⁻¹ (0.47 g m⁻² h⁻¹) in the e-FO system, 67.5 ± 0.5% lower than that of the control system; in addition, the e-FO system recovered ~0.32 g L⁻¹ of the reverse-fluxed DS and this could not be realized in the control. When the e-FO system was examined with three types of the mimicked fertilizer, RSF reduction and DS recovery were largely affected by the individual components of a fertilizer DS. The energy consumption of the e-FO system was reduced by ~90%, from 0.38 ± 0.01 to 0.04 ± 0.01 kWh m⁻³ when the recirculation rate decreased from 60 to 15 mL min⁻¹. Those results have demonstrated the technical feasibility of an e-FO system that is capable of reducing RSF and recovering the lost DS and will encourage further investigation by addressing several identified challenges.

逆向溶质通量 (RSF) 是运行正渗透 (FO) 系统的关键问题，会导致驱动溶质 (DS) 损失和进料中的盐分积累。在此，开发了一种电解辅助 FO (e-FO) 系统，用于同时减少 RSF 和回收反向助焊剂 DS。在 e-FO 系统中施加 1.5 V 的电压导致 RSF 为 3.34 ± 0.01 mmol m ^-2  h ^-1 (0.47 g m ^-2  h ^-1 )，比对照系统低 67.5 ± 0.5%；此外，e-FO 系统回收了 ~0.32 g L ^-1反向助焊剂 DS 的，这在控制中无法实现。当用三种模拟肥料检查 e-FO 系统时，RSF 减少和 DS 回收在很大程度上受肥料 DS 的各个成分的影响。当再循环率从 60 mL min ^-1降低到 15 mL min ^-1时，e-FO 系统的能耗降低了约 90%，从 0.38 ± 0.01 降低到 0.04 ± 0.01 kWh m ^-3。这些结果证明了 e-FO 系统的技术可行性，该系统能够减少 RSF 并恢复丢失的 DS，并将通过解决几个已确定的挑战来鼓励进一步调查。