BACKGROUND: While microbial electrolysis cells (MECs) can simultaneously produce bioelectrochemical @entity3884 and treat wastewater, they consume considerable energy to overcome the unfavorable thermodynamics, which is not sustainable and economically feasible in practical applications. This study presents a proof-of-concept system in which @entity3884 can be produced in an @entity17469 powered by theoretically predicated energy from pressure-retarded osmosis (PRO). The system consists of a PRO unit that extracts high-quality water and generates electricity from water osmosis, and an @entity17469 for organic removal and @entity3884 production. The feasibility of the system was demonstrated using simulated PRO performance (in terms of energy production and effluent quality) and experimental @entity17469 results (e.g., @entity3884 production and organic removal). RESULTS: The PRO and @entity17469 models were proven to be valid. The model predicted that the PRO unit could produce 485  mL of clean water and 579  J of energy with 600  mL of draw solution (0.8  M of @entity4202 ). The amount of the predicated energy was applied to the @entity17469 by a power supply, which drove the @entity17469 to remove 93.7  % of the organic compounds and produce 32.8  mL of H2 experimentally. Increasing the PRO influent volume and draw concentration could produce more energy for the @entity17469 operation, and correspondingly increase the @entity17469 hydraulic retention time (HRT) and total @entity3884 production. The models predicted that at an external voltage of 0.9  V, the @entity17469 energy consumption reached the maximum PRO energy production. With a higher external voltage, the @entity17469 energy consumption would exceed the PRO energy production, leading to negative effects on both organic removal and @entity3884 production. CONCLUSIONS: The PRO- @entity17469 system holds great promise in addressing water-energy nexus through organic removal, @entity3884 production, and water recovery: (1) the PRO unit can reduce the volume of wastewater and extract clean water; (2) the PRO effluents can be further treated by the @entity17469 ; and  (3) the osmotic energy harvested from the PRO unit can be applied to the @entity17469 for sustainable bioelectrochemical @entity3884 production.

Bioelectrochemical production of XXXX in an innovative pressure-retarded osmosis/microbial electrolysis cell system: experiments and modeling.

@entity17469 :: ('56477', 'Gene') :: ['MEC'] @entity3884 :: ('MESH:D006859', 'Chemical') :: ['hydrogen'] @entity4202 :: ('D012965', 'Chemical') :: ['NaCl']
@entity3884 :: (MESH:D006859,Chemical) :: ['hydrogen']
