A key challenge for osmotic membrane bioreactors (OMBRs) application is reverse solute flux and consequent salt accumulation in the feed side. Herein, a bioelectrochemical system (BES) was employed to drive reverse-fluxed solutes from the feed of an OMBR into a cathode compartment for recovery and subsequent reuse as a draw solute (DS). Compared to a system without BES function, the present system enhanced water recovery from 925 to 1688 mL and increased the chemical oxygen demand (COD) removal efficiency from 40.2 ± 8.1 to 75.2 ± 3.3%, benefited from its lower anolyte conductivity of 9.0 mS cm⁻¹ than that of the control system (24.1 mS cm⁻¹). The CO₂ addition significantly improved the ammonia recovery rate to 93.3–116.7 g N m⁻³ h⁻¹ (or 248.0–307.4 g N m⁻² d⁻¹), 12.1–14.5 times higher than that without CO₂ addition. The recovered DS was successfully applied to accomplish water extraction in the reuse test, and such a recovery/reuse process could result in a normalized water recovery of 3870 mL mol DS⁻¹ or a DS usage of 0.26 mol L⁻¹ (of the recovered water). The energy consumption of the system might be compensated by the production of bioenergy, and the net specific energy consumption was estimated to be 0.004–0.112 kWh m⁻³ wastewater, 0.007–0.179 kWh kg⁻¹ removed COD, or 0.001–0.020 kWh kg⁻¹ recovered NH₄⁺-N. Those results have demonstrated that bioelectrochemical processes can be an effective approach for in situ mitigation of reverse-fluxed solute in OMBR and recovering “the lost DS” towards both reuse and reduced operational expense.

渗透膜生物反应器（OMBR）的应用面临的主要挑战是逆溶质通量以及随之而来的盐在进料侧的积累。在本文中，采用生物电化学系统（BES）将逆流溶质从OMBR的进料中驱入阴极室，以进行回收并随后作为汲取溶质（DS）再使用。与没有BES功能的系统相比，本系统得益于其较低的9.0 mS cm的阳极电解质电导率，将水的回收率从925提高到1688 mL，并将化学需氧量（COD）的去除效率从40.2±8.1提高到75.2±3.3％。^-1比控制系统的^-1（24.1 mS cm ^-1）。添加CO _2可以显着提高氨回收率，达到93.3-116.7 g N m ^-3 h^-1（或248.0–307.4 g N m ^-2 d ^-1），是不添加CO _2的12.1–14.5倍。将回收的DS被成功地应用到完成在重用测试水提取，并且这样的回收/再利用过程可能会导致在3870毫升摩尔DS的归一化水回收^-1或0.26摩尔升的DS使用^-1（回收的水）。系统的能耗可以通过生物能源的生产来补偿，净比能耗估计为0.004-0.112 kWh m ^-3废水，0.007-0.179 kWh kg ^-1去除的COD或0.001-0.020 kWh kg ^-1回收的NH ₄ ⁺-N。这些结果表明，生物电化学工艺可以有效地原位缓解OMBR中的逆流溶质，并回收“丢失的DS”，从而实现重复利用和降低运营成本。