dc.contributor.authorChen, Guizi
dc.contributor.authorYang, Xing
dc.contributor.authorWang, Rong
dc.contributor.authorFane, Anthony Gordon
dc.identifier.citationChen, G. Z., Yang, X., Wang, X., & Fane, A. G. (2013). Performance enhancement and scaling control with gas bubbling in a direct contact membrane distillation. Desalination, 308, 47-55.en_US
dc.description.abstractThis study incorporates gas bubbling into direct contact membrane distillation (DCMD) and examines its effect on the MD performance especially at elevated salt concentrations in the feed steam. Process optimization in the bubbling assisted DCMD process was carried out which involved varying operating conditions and module configurations. Also, observations were performed for the scaling status on the membrane surface with operating time in different modules to further understand the role of gas bubbling in affecting the behavior of crystal deposition when the salt concentration has reached super-saturation. Due to intensified local mixing and physical flow disturbance in the liquid boundary layer on the feed side, a higher flux enhancement could be achieved in a bubbling system with either a higher feed operating temperature, lower feed and permeate flow velocities, inclined module orientation, shorter fiber length or lower packing density. It was also found that gas bubbling not only enhanced the permeation flux by average 26% when concentrating feed solution from 18% salt concentration to saturation, but also delayed the occurrence of major flux decline due to crystal deposition when compared to the module with spacers. These results were confirmed by membrane surface autopsy at different operating stages using SEM.en_US
dc.rights© 2012 Elsevier B.V. This is the author created version of a work that has been peer reviewed and accepted for publication by The journal of Desalination, Elsevier B.V. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI:http://dx.doi.org/10.1016/j.desal.2012.07.018].en_US
dc.subjectDRNTU::Engineering::Civil engineering::Water resources
dc.titlePerformance enhancement and scaling control with gas bubbling in a direct contact membrane distillationen_US
dc.typeJournal Article
dc.contributor.schoolSchool of Civil and Environmental Engineeringen_US
dc.description.versionAccepted version

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