Alcohol Removal From Beer by Reverse Osmosis

Authors: Catarino, Margarida¹; Mendes, Adélio¹; Madeira, Luis¹; Ferreira, António²

Source: Separation Science and Technology, Volume 42, Number 13, January 2007 , pp. 3011-3027(17)

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Abstract:

In this work reverse osmosis technology was used for removing alcohol from beer. The process was carried out in a diafiltration mode and it was possible to obtain a final beer with low ethanol content (less than 0.5% v/v). Several cellulose acetate and polyamide membranes were tested with transmembranar pressures ranging from 20 to 40 bar. Temperature and feed flowrate varied from 5 to 20°C and from 2 to 7 l · min-1, respectively. It was observed that permeate flux and alcohols rejection increase with the feed pressure, whereas esters rejection decreases with pressure. Permeate flux increases with temperature, while rejections decrease with it. Concentration polarization occurs at low feed flowrates.

Keywords: Reverse osmosis; beer dealcoholization; membrane selection; cellulose acetate; polyamide

Document Type: Research article

DOI: http://dx.doi.org/10.1080/01496390701560223

Affiliations: 1: LEPAE, Faculty of Engineering, Chemical Engineering Department, University of Porto, Porto, Portugal 2: Unicer, Beverages of Portugal S.A., Mamede de Infesta, Portugal

Publication date: 2007-01-01