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Membrane distillation of meat industry effluent with hydrophilic polyurethane coated polytetrafluoroethylene membranes

Mostafa, M. G., Zhu, Bo, Cran, Marlene, Dow, Noel, Milne, Nicholas, Desai, Dilip and Duke, Mikel 2017, Membrane distillation of meat industry effluent with hydrophilic polyurethane coated polytetrafluoroethylene membranes, Membranes, vol. 7, no. 4, pp. 1-20, doi: 10.3390/membranes7040055.

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Title Membrane distillation of meat industry effluent with hydrophilic polyurethane coated polytetrafluoroethylene membranes
Author(s) Mostafa, M. G.
Zhu, Bo
Cran, Marlene
Dow, Noel
Milne, Nicholas
Desai, Dilip
Duke, Mikel
Journal name Membranes
Volume number 7
Issue number 4
Article ID 55
Start page 1
End page 20
Total pages 20
Publisher MDPI
Place of publication Basel, Switzerland
Publication date 2017-09-29
ISSN 2077-0375
Keyword(s) meat industry
membrane distillation
membrane microfiltration
stick water
Summary Meat rendering operations produce stick water waste which is rich in proteins, fats, and minerals. Membrane distillation (MD) may further recover water and valuable solids, but hydrophobic membranes are contaminated by the fats. Here, commercial hydrophobic polytetrafluorethylene (PTFE) membranes with a hydrophilic polyurethane surface layer (PU-PTFE) are used for the first time for direct contact MD (DCMD) on real poultry, fish, and bovine stick waters. Metal membrane microfiltration (MMF) was also used to capture fats prior to MD. Although the standard hydrophobic PTFE membranes failed rapidly, PU-PTFE membranes effectively processed all stick water samples to colourless permeate with sodium rejections >99%. Initial clean solution fluxes 5–6 L/m2/h declined to less than half during short 40% water recovery tests for all stick water samples. Fish stick water uniquely showed reduced fouling and up to 78% water recovery. Lost flux was easily restored by rinsing the membrane with clean water. MMF prior to MD removed 92% of fats, facilitating superior MD performance. Differences in fouling between stick waters were attributed to temperature polarisation from higher melt temperature fats and relative proportions to proteins. Hydrophilic coated MD membranes are applicable to stick water processing but further studies should consider membrane cleaning and longer-term stability.
Language eng
DOI 10.3390/membranes7040055
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2017, The Authors
Free to Read? Yes
Use Rights Creative Commons Attribution licence
Persistent URL http://hdl.handle.net/10536/DRO/DU:30105274

Document type: Journal Article
Collections: School of Engineering
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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.