The Rapid Visco Analyser as a rheological tool to determine the potential brewing quality of barley and malt Les publications

  • Godin, B. , De Smedt, C. , Deneyer, V , Pietercelie, A & Sinnaeve, G (2019). The Rapid Visco Analyser as a rheological tool to determine the potential brewing quality of barley and malt. Poster in: EBC Antwerp 02-06 June 2019,
Type Poster
Author Godin, B.|De Smedt, C.|Deneyer, V|Pietercelie, A|Sinnaeve, G
Year 2019
Title The Rapid Visco Analyser as a rheological tool to determine the potential brewing quality of barley and malt
Event name EBC Antwerp 02-06 June 2019
Unit Unité biomasse, bioproduits et énergies
Unité technologies de la transformation des produits
Abstract To meet expectations of brewer and microbrewers promoting local and craft production of barley and malt, it is necessary to have a fast and efficient tool to easily determine their potential brewing quality. It was with this in mind that the application of the Rapid Visco Analyzer (RVA), a rheological tool which is commonly used to determine pre-harvest sprouting and pasting properties of starch in cereals (mostly wheat) was evaluated. 34 barleys were harvested in 2017 in Belgium. They were selected for their high degree of diversity: several varieties, various pedoclimates and different cropping methods. Samples were analyzed in terms of germination rates, screening, protein, Hagberg falling number and RVA. Their corresponding malts (malted under same standard conditions at VLB facilities) were evaluated for usual brewing parameters (extract yield, viscosity, etc…). The RVA measurements were performed under both autolytic and enzyme-inhibited conditions on barley (Malting Barley Method from Perten) and adapted for malt to have higher degree of viscosity and clearer viscograms (Adapted Kilned Malt Method from Perten). Results showed a strong multivariate relationship between RVA data and barley quality parameters like pre-germination of the grain. Concerning malts, friability, yield extract and wort viscosity also presented clear correlations with RVA values. It could be very helpful for maltsters so as brewers to have rapid and reliable prediction of barley and/or malt quality and RVA analysis, already used in cereal industry, is a new way to meet these requirements. This would also be useful for craft malting plants and breweries.
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