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Industrial clarification of anthocyanin-rich grape pomace extracts by crossflow membrane filtration

AuthorsProdanov, M. ; Vacas, Visitación; Sánchez, Ana M.; Alonso, Gonzalo L.; Elorza, A.; Lucendo, C.; Hernández, M. Teresa ; Estrella, Isabel
Issue Date2013
CitationInternational Journal of Food Science and Technology 48(7): 1426-1435 (2013)
AbstractA comparative study on the clarification of anthocyanin-rich grape pomace extracts was carried out by tubular, hollow fibre and spiral wound industrial crossflow membrane units. Three polysulfone membranes were tested: a 500-kDa molecular mass cut-off (MMCO), and a 0.2- and 0.6-μm pore size cut-offs (PSCO). The 500- kDa MMCO and the 0.2-μm PSCO membranes produced particle-free extracts, while the 0.6-μm membrane showed deficient clarification. The 500-kDa MMCO membrane produced up to 3.7% loss of most of the individual anthocyanins, while the 0.6- and 0.2-μm PSCO membranes produced up to 2% only of some of the anthocyanins with higher molecular masses. Permeate steady fluxes of up to 53 L h-1 m-2 were obtained. Particles with sizes of 0.5-1.5 μm and the macromolecular anthocyanin-tannin complexes had a major impact on membrane performance. The obtained results are scalable to industrial installations. © 2013 The Authors. International Journal of Food Science and Technology © 2013 Institute of Food Science and Technology.
Identifiersdoi: 10.1111/ijfs.12105
issn: 0950-5423
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