Abstract By combining the merits of bioelectrochemical systems and osmotic membrane bioreactors (OMBRs), bioelectrochemically assisted OMBRs (BEA-OMBRs) can achieve simultaneous water/electricity recovery and salinity mitigation. One of the key challenges is reverse solute flux (RSF). The “negative effect” of RSF was turned into a “beneficial effect” by using a reverse-fluxed draw solute (DS) as a buffering agent or a carbon source supplement. The reverse-fluxed anions from the alkaline buffering DSs (NaHCO3 and PBS) stabilized the anolyte pH and had a positive effect on system performance, such as a high total Coulomb of 278.16–289.80C, a high recovered water of 261.64–277.80 mL, and a high COD removal of 90.91–91.61%. The reverse-fluxed cations from the acidic buffering DS (NH4Cl) promoted the accumulated ammonium to diffuse from the feed/anode to the cathode side due to the production of ammonia gas in the alkaline catholyte. The organic DS exhibited a lower RSF and a lower anolyte conductivity of 5.12–8.49 mS cm−1. However, the reverse-fluxed organic DSs (glucose and NaOAc) had a negative effect on the electricity generation due to carbon source competition. These results have demonstrated the advantages of the reverse-fluxed DS to enhance the system performance and to encourage further development of BEA-OMBR technology.

中文翻译：

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提高基于有机和缓冲驱动溶质反向扩散的生物电化学辅助渗透膜生物反应器的性能

摘要 通过结合生物电化学系统和渗透膜生物反应器（OMBRs）的优点，生物电化学辅助的OMBRs（BEA-OMBRs）可以同时实现水电回收和盐分减缓。主要挑战之一是反向溶质通量 (RSF)。通过使用反熔驱动溶质 (DS) 作为缓冲剂或碳源补充剂，RSF 的“负面影响”变成了“有益影响”。来自碱性缓冲 DSs（NaHCO3 和 PBS）的反向流动阴离子稳定了阳极电解液的 pH 值并对系统性能产生了积极影响，例如 278.16-289.80C 的高总库仑，261.64-277.80 mL 的高回收水，以及 90.91-91.61% 的高 COD 去除率。由于碱性阴极电解液中氨气的产生，来自酸性缓冲 DS (NH4Cl) 的反向流动阳离子促进了积累的铵从进料/阳极扩散到阴极侧。有机 DS 表现出较低的 RSF 和较低的阳极电解液电导率，为 5.12–8.49 mS cm-1。然而，由于碳源竞争，反向流动的有机 DSs（葡萄糖和 NaOAc）对发电有负面影响。这些结果证明了反向熔剂 DS 在提高系统性能和鼓励 BEA-OMBR 技术的进一步发展方面的优势。由于碳源竞争，反向流动的有机 DSs（葡萄糖和 NaOAc）对发电有负面影响。这些结果证明了反向熔剂 DS 在提高系统性能和鼓励 BEA-OMBR 技术的进一步发展方面的优势。由于碳源竞争，反向流动的有机 DSs（葡萄糖和 NaOAc）对发电有负面影响。这些结果证明了反向熔剂 DS 在提高系统性能和鼓励 BEA-OMBR 技术的进一步发展方面的优势。