A simulation model for planning of the mashing process

Jari Hämäläinen, Tatu Koljonen, Katharina Stenholm, Kirsti Pietilä

Research output: Contribution to journalArticleScientificpeer-review

Abstract

The development of a computer simulation of the mashing process, incorporating mathematical models of starch hydrolysis, beta glucan hydrolysis and proteolysis which predict the effects of changes in mashing temperature on the activity levels of the relevant enzymes and the concentrations in the mash of the products and residues of the enzymic reactions, on the basis of the initial mash composition (liquor, malt grist, adjuncts and exogenous enzyme preparations) is described and the analyses required to obtain the necessary information on raw materials composition are listed. The ability of the simulation to predict the outcome of real brewery mashings depends on the accuracy of the initial input data, but can be quite precise under optimum conditions. Applications include the development of recipes for new beer brands and the determination of the optimum mashing procedures for malts made from new barley varieties or from a new season's crop of existing varieties. It is pointed out that the fact that analyses other than the conventional set of malt quality tests are needed to obtain the malt composition data required by the simulation program is not a fault in the system but indicates the shortcomings of the standard set of malt analyses.
Original languageEnglish
Pages (from-to)313 - 319
Number of pages7
JournalMBAA Technical Quarterly
Volume34
Issue number1
Publication statusPublished - 1997
MoE publication typeA1 Journal article-refereed

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hydrolysis
enzyme
barley
starch
computer simulation
simulation
crop
temperature
planning
product
test
programme
raw material
effect

Keywords

  • computer program mashing model simulation

Cite this

Hämäläinen, J., Koljonen, T., Stenholm, K., & Pietilä, K. (1997). A simulation model for planning of the mashing process. MBAA Technical Quarterly, 34(1), 313 - 319.
Hämäläinen, Jari ; Koljonen, Tatu ; Stenholm, Katharina ; Pietilä, Kirsti. / A simulation model for planning of the mashing process. In: MBAA Technical Quarterly. 1997 ; Vol. 34, No. 1. pp. 313 - 319.
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Hämäläinen, J, Koljonen, T, Stenholm, K & Pietilä, K 1997, 'A simulation model for planning of the mashing process', MBAA Technical Quarterly, vol. 34, no. 1, pp. 313 - 319.

A simulation model for planning of the mashing process. / Hämäläinen, Jari; Koljonen, Tatu; Stenholm, Katharina; Pietilä, Kirsti.

In: MBAA Technical Quarterly, Vol. 34, No. 1, 1997, p. 313 - 319.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

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AU - Koljonen, Tatu

AU - Stenholm, Katharina

AU - Pietilä, Kirsti

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AB - The development of a computer simulation of the mashing process, incorporating mathematical models of starch hydrolysis, beta glucan hydrolysis and proteolysis which predict the effects of changes in mashing temperature on the activity levels of the relevant enzymes and the concentrations in the mash of the products and residues of the enzymic reactions, on the basis of the initial mash composition (liquor, malt grist, adjuncts and exogenous enzyme preparations) is described and the analyses required to obtain the necessary information on raw materials composition are listed. The ability of the simulation to predict the outcome of real brewery mashings depends on the accuracy of the initial input data, but can be quite precise under optimum conditions. Applications include the development of recipes for new beer brands and the determination of the optimum mashing procedures for malts made from new barley varieties or from a new season's crop of existing varieties. It is pointed out that the fact that analyses other than the conventional set of malt quality tests are needed to obtain the malt composition data required by the simulation program is not a fault in the system but indicates the shortcomings of the standard set of malt analyses.

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Hämäläinen J, Koljonen T, Stenholm K, Pietilä K. A simulation model for planning of the mashing process. MBAA Technical Quarterly. 1997;34(1):313 - 319.