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Industrial clarification of anthocyanin‐rich grape pomace extracts by crossflow membrane filtration |
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| Authors: | Marin Prodanov Visitación Vacas Ana M Sánchez Gonzalo L Alonso Ángeles Elorza César Lucendo Teresa Hernández Isabel Estrella |
| Affiliation: | 1. Instituto de Investigación en Ciencias de la Alimentación (CIAL) (CEI, CSIC‐UAM), Ciudad Universitaria de Cantoblanco, , Madrid, 28049 Spain;2. Instituto Madrile?o de Investigación y Desarrollo Rural, Agrario y Alimentario (IMIDRA), , Madrid, Spain;3. Cátedra Química Agrícola, ETSI Agrónomos, Universidad de Castilla‐La Mancha, , Albacete, 02071 Spain;4. Department of Pharmaceutical Physicochemistry, Facultad de Farmacia, Universidad Complutense de Madrid, , Madrid, 28040 Spain;5. Alcoholeras Reunidas S.A. (ARSA), , Ciudad Real, Spain;6. Instituto de Ciencias y Tecnología de Alimentos y Nutrición (ICTAN, CSIC), , Madrid, 28006 Spain |
| Abstract: | A 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. |
| Keywords: | Anthocyanin‐rich extracts crossflow membrane filtration grape by‐products haze removal polysulfone membranes |