Anti-scaling and water flux enhancing effect of alginate in membrane distillation
Arkhangelsky E. Wicaksana F. Wang R.
15 October 2021Elsevier B.V.
Desalination
2021#514
This study focused on the effect of sodium alginate on the performance of direct contact membrane distillation (DCMD). The feed solution contained various combinations of sodium chloride, sodium sulfate and calcium chloride along with bovine serum albumin, xanthan gum and sodium alginate. Unlike findings from the majority of prior studies that suggested the presence of alginate in feed solution caused the deterioration of membrane process performance, our results indicated that sodium alginate exhibited anti-scaling properties and water flux enhancing effect. However, this interesting phenomenon was exhibited by sodium alginate under particular conditions only. Experiments performed with other organic foulants such as xanthan gum did not display the same trend. It is believed that the presence of a hydrophilic layer (calcium alginate gel), which is much less thermal conductive as compared to the PTFE membrane, on the top of the membrane could reduce the amount of heat dissipated due to evaporative cooling or reduce conductive heat loss in the membrane, thus enhancing the thermal efficiency of the system.
Alginate , Anti-scaling , Evaporative cooling , Membrane distillation , Water flux enhancing effect
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Department of Civil and Environmental Engineering, School of Engineering and Digital Sciences, Nazarbayev University, 53 Kabanbay Batyr Avenue, Nur Sultan, 010000, Kazakhstan
Department of Chemical and Materials Engineering, the University of Auckland, 5 Grafton Road, Auckland, 1010, New Zealand
School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
Singapore Membrane Technology Center, Nanyang Technological University, 639798, Singapore
Department of Civil and Environmental Engineering
Department of Chemical and Materials Engineering
School of Civil and Environmental Engineering
Singapore Membrane Technology Center
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