Experimental Study and Modeling of Beer Dealcoholization via Reverse Osmosis

The goals of the present investigation are to study and to model pale lager beer dealcoholization via reverse osmosis (RO). Samples were dealcoholized at a temperature of 15 ± 1 °C. An Alfa Laval RO99 membrane with a 0.05 m surface was used. The flux values were measured during the separations. The...

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Published in:Membranes (Basel) 2023-03, Vol.13 (3), p.329
Main Authors: Varga, Áron, Bihari-Lucena, Eszter, Ladányi, Márta, Szabó-Nótin, Beatrix, Galambos, Ildikó, Koris, András
Format: Article
Language:English
Subjects:
Alcohol
alcohol-free beer
Beer
Beverages
Bitterness
Breweries
Caustic soda
dealcoholization
Design of experiments
Energy consumption
Ethanol
Experimental design
Experiments
Flow rates
Flow velocity
Fluctuations
Lager
low-alcohol beer
Mathematical models
Membrane separation
membrane separation processes
Methods
modeling
Objective function
Osmosis
Parameters
Reverse osmosis
Turbidity
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Summary:The goals of the present investigation are to study and to model pale lager beer dealcoholization via reverse osmosis (RO). Samples were dealcoholized at a temperature of 15 ± 1 °C. An Alfa Laval RO99 membrane with a 0.05 m surface was used. The flux values were measured during the separations. The ethanol content, extract content, bitterness, color, pH, turbidity, and dynamic viscosity of beer and permeate samples were measured. The initial flux values were determined using linear regression. The initial ethanol flux (JEtOH 0) values were calculated from the initial flux values and the ethanol content values. A 2 full factorial experimental design was applied, and the factors were as follows: transmembrane pressure (TMP): 10, 20, 30 bar; retentate flow rate (Q): 120, 180, 240 L/h; JEtOH 0 was considered as the response. The effect sizes of the significant parameters were calculated. The global maximum of the objective function was found using a self-developed Grid Search code. The changes in the analytical parameters were appropriate. The TMP had a significant effect, while the Q had no significant effect on the JEtOH 0. The effect size of the TMP was 1.20. The optimal value of the factor amounted to TMP = 30 bar. The predicted JEtOH 0 under the above conditions was 121.965 g/m h.
ISSN:2077-0375
2077-0375
DOI:10.3390/membranes13030329