Submerged Osmotic Processes: Design and Operation to Mitigate Mass Transfer Limitations
dc.contributor.author
dc.date.accessioned
2018-09-06T06:31:22Z
dc.date.available
2018-09-06T06:31:22Z
dc.date.issued
2018-09-01
dc.identifier.uri
dc.description.abstract
Submerged forward osmosis (FO) is of high interest for bioreactors, such as osmotic membrane bioreactor, microalgae photobioreactor, food or bioproduct concentration where pumping through pressurized modules is a limitation due to viscosity or breakage of fragile components. However, so far, most FO efforts have been put towards cross flow configurations. This study provides, for the first time, insights on mass transfer limitations in the operation of submerged osmotic systems and offer recommendations for optimized design and operation. It is demonstrated that operation of the submerged plate and frame FO module requires draw circulation in the vacuum mode (vacuum assisted osmosis) that is in favor of the permeation flux. However, high pressure drops and dead zones occurring in classical U-shape FO draw channel strongly disadvantage this design; straight channel design proves to be more effective. External concentration polarization (ECP) is also a crucial element in the submerged FO process since mixing of the feed solution is not as optimized as in the cross flow module unless applying intense stirring. Among the mitigation techniques tested, air scouring proves to be more efficient than feed solution circulation. However, ECP mitigation methodology has to be adapted to application specificities with regards to combined/synergetic effects with fouling mitigation
dc.description.sponsorship
The research leading to these results has received funding from the People Programme (Marie Curie
Actions) of the Seventh Framework Programme of the European Union (FP7/2007-2013) under REA grant
agreement n◦ 600388 (TECNIOspring programme), and from the Agency for Business Competitiveness of the
Government of Catalonia, ACCIO. LEQUIA and ICRA were recognized as consolidated research groups by the
Catalan Government with codes 2017-SGR-1552 and 2017 SGR 1318, respectively
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
MDPI (Multidisciplinary Digital Publishing Institute)
dc.relation.isformatof
Reproducció digital del document publicat a: https://doi.org/10.3390/membranes8030072
dc.relation.ispartof
Membranes, 2018, vol. 8, núm. 3, p. 72
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Articles publicats (D-EQATA)
dc.rights
Attribution 4.0 International
dc.rights.uri
dc.title
Submerged Osmotic Processes: Design and Operation to Mitigate Mass Transfer Limitations
dc.type
info:eu-repo/semantics/article
dc.rights.accessRights
info:eu-repo/semantics/openAccess
dc.type.version
info:eu-repo/semantics/publishedVersion
dc.identifier.doi
dc.type.peerreviewed
peer-reviewed
dc.identifier.eissn
2077-0375