Scaling has been a major technical challenge in the membrane distillation (MD) process, hindering the broader application of MD processes. Despite the increasing number of studies on MD scaling, there are limited prediction tools to describe the scaling process and help make informed decisions about the experimental conditions to prevent scaling and its irreversible damage. In this paper, a semi-analytical model was developed based on the classical nucleation theory and crystal growth to model the membrane area reduction caused by the deposition of inorganic salt crystals on the membrane surface, which is equivalent to the decrease in permeate flux resulting from scaling. The model was developed using calcium sulphate, a model scalant. The model was validated and verified with available literature data, and it has been proved that the model has the capability to produce reasonable predictions on the onset of flux decline and the declining rate with respect to the experimental data with
Nick Fetty | May 22, 2015 A recent report identifies 2015's most promising technologies for addressing climate and other environmental concerns. The 157-page report - "Top Technologies in Clean & Green Environment - 2015" was published earlier this month in Research and Markets. The authors examine ways to address environmental concerns such as water scarcity, energy depletion…
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MyJournals.org - Science - [ASAP] Interlayered Interface of a Thin Film Composite Janus Membrane for Sieving Volatile Substances in Membrane Distillation (Environmental Science & Technology)
MyJournals.org - Science - [ASAP] A Tale of Two Foulants: The Coupling of Organic Fouling and Mineral Scaling in Membrane Desalination (Environmental Science & Technology)