Study of innovative methods of control in the cereal productive chain for the production of beer and spirits

Sileoni, Valeria (2011) Study of innovative methods of control in the cereal productive chain for the production of beer and spirits, [Dissertation thesis], Alma Mater Studiorum Università di Bologna. Dottorato di ricerca in Scienze e biotecnologie degli alimenti, 23 Ciclo. DOI 10.6092/unibo/amsdottorato/3575.
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Abstract

Researches performed during the PhD course intended to assess innovative applications of near-infrared spectroscopy in reflectance (NIR) in the production chain of beer. The purpose is to measure by NIR the "malting quality" (MQ) parameter of barley, to monitor the malting process and to know if a certain type of barley is suitable for the production of beer and spirits. Moreover, NIR will be applied to monitor the brewing process. First of all, it was possible to check the quality of the raw materials like barley, maize and barley malt using a rapid, non-destructive and reliable method, with a low error of prediction. The more interesting result obtained at this level was that the repeatability of the NIR calibration models developed was comparable with the one of the reference method. Moreover, about malt, new kinds of validation were used in order to estimate the real predictive power of the proposed calibration models and to understand the long-term effects. Furthermore, the precision of all the calibration models developed for malt evaluation was estimated and statistically compared with the reference methods, with good results. Then, new calibration models were developed for monitoring the malting process, measuring the moisture content and other malt quality parameters during germination. Moreover it was possible to obtain by NIR an estimate of the "malting quality" (MQ) of barley and to predict whether if its germination will be rapid and uniform and if a certain type of barley is suitable for the production of beer and spirits. Finally, the NIR technique was applied to monitor the brewing process, using correlations between NIR spectra of beer and analytical parameters, and to assess beer quality. These innovative results are potentially very useful for the actors involved in the beer production chain, especially the calibration models suitable for the control of the malting process and for the assessment of the “malting quality” of barley, which need to be deepened in future studies.

Abstract
Tipologia del documento
Tesi di dottorato
Autore
Sileoni, Valeria
Supervisore
Dottorato di ricerca
Scuola di dottorato
Scienze agrarie
Ciclo
23
Coordinatore
Settore disciplinare
Settore concorsuale
Parole chiave
NIR barley beer
URN:NBN
DOI
10.6092/unibo/amsdottorato/3575
Data di discussione
26 Maggio 2011
URI

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