Multifactorial Modeling of the Flux during Ultrafiltration of Strawberry Extract

MARIYA DUSHKOVA¹; ANGEL DINCHEV¹; KIRIL MIHALEV¹; MILENA MITEVA-PETROVA²; STOYKO PETROV^2
1 University of Food Technologies, BG-4002 Plovdiv, Bulgaria
² University “Prof. Dr. Asen Zlatarov, BG-8010 Burgas, Bulgaria

Abstract

Dushkova, M., A. Dinchev, K. Mihalev, M. Miteva-Petrova a nd S. Petrov, 2017. Multifactorial modeling of the flux during ultrafi ltration of strawberry extract. Bulg. J. Agric. Sci., 23 (1): 165–170

Combined effects of working pressure, volume reduction ratio and feed fl ow rate on the fl ux during ultrafi ltration of strawberry extract were studied depending on the molecular weight cut-off (1, 10 and 25 kDa) of polyacrylonitrile membranes. The mathematical models and response surfaces obtained demonstrate the highest flux values at high levels of working pressure and feed fl ow rate and low level of volume reduction ratio.

Key words: ultrafi ltration, fl ux, multifactorial model, strawberry extract
Abbreviations: UF – ultrafi ltration ; PAN – polyacrilonitrile ; VRR – volume reduction ratio ; DMSO – dimethyl sulfoxide; DMF – dimethyl formamide; MWCO – molecular weight cut-off

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