Techno-economic analysis of forward osmosis pre-concentration before an anaerobic membrane bioreactor: Impact of draw solute and membrane material

Sergi Vinardell, Gaetan Blandin, Federico Ferrari, Geoffroy Lesage (), Joan Mata-Alvarez, Joan Dosta and Sergi Astals
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Sergi Vinardell: UB - Universitat de Barcelona
Gaetan Blandin: UdG - Universitat de Girona = University of Girona
Geoffroy Lesage: IEM - Institut Européen des membranes - INC-CNRS - Institut de Chimie - CNRS Chimie - CNRS - Centre National de la Recherche Scientifique - UM - Université de Montpellier - ENSCM - Ecole Nationale Supérieure de Chimie de Montpellier - UM - Université de Montpellier
Joan Mata-Alvarez: UB - Universitat de Barcelona
Sergi Astals: UB - Universitat de Barcelona

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Abstract: This research investigated the impact of draw solute and membrane material on the economic balance of a forward osmosis (FO) system pre-concentrating municipal sewage prior to an anaerobic membrane bioreactor (AnMBR). Eight and three different draw solutes were evaluated for cellulose triacetate (CTA) and polyamide thin film composite (TFC) membranes, respectively. The material of the FO membrane was a key economic driver since the net cost of TFC membrane was substantially lower than the CTA membrane. The draw solute had a moderate impact on the economic balance. The most economically favourable draw solutes were sodium acetate and calcium chloride for the CTA membrane and magnesium chloride for the TFC membrane. The FO + AnMBR performance was modelled for both FO membrane materials and each draw solute considering three FO recoveries (50, 80 and 90%). The estimated COD removal efficiency of the AnMBR was similar regardless of the draw solute and FO membrane material. However, the COD and draw solute concentrations in the permeate and digestate increased as the FO recovery increased. These results highlight that FO membranes with high permselectivity are needed to improve the economic balance of mainstream AnMBR and to ensure the quality of the permeate and digestate.

Keywords: Draw solute; Techno-economic evaluation; Forward osmosis (FO); Anaerobic membrane bioreactor (AnMBR); Anaerobic digestionReverse osmosis (RO) (search for similar items in EconPapers)
Date: 2022-07
New Economics Papers: this item is included in nep-his
Note: View the original document on HAL open archive server: https://hal.science/hal-03709623v1
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Published in Journal of Cleaner Production, 2022, 356, pp.131776. ⟨10.1016/j.jclepro.2022.131776⟩

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Persistent link: https://EconPapers.repec.org/RePEc:hal:journl:hal-03709623

DOI: 10.1016/j.jclepro.2022.131776

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