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Štulíková K, Vrzal T, Kubizniaková P, Enge J, Matoulková D, Brányik T. Spoilage of bottled lager beer contaminated with
Saccharomyces cerevisiae
var.
diastaticus. JOURNAL OF THE INSTITUTE OF BREWING 2021. [DOI: 10.1002/jib.653] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Kateřina Štulíková
- Department of Biotechnology, Faculty of Food and Biochemical Technology University of Chemistry and Technology Technická 5 Prague 16628 Czech Republic
| | - Tomáš Vrzal
- Research Institute of Brewing and Malting Lípová 511/15 Prague 12044 Czech Republic
| | - Petra Kubizniaková
- Research Institute of Brewing and Malting Lípová 511/15 Prague 12044 Czech Republic
| | - Jan Enge
- Plzeňský Prazdroj a.s., U Prazdroje 64/7 Plzeň 301 00 Czech Republic
| | - Dagmar Matoulková
- Research Institute of Brewing and Malting Lípová 511/15 Prague 12044 Czech Republic
| | - Tomáš Brányik
- Research Institute of Brewing and Malting Lípová 511/15 Prague 12044 Czech Republic
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Štulíková K, Bulíř T, Nešpor J, Jelínek L, Karabín M, Dostálek P. Application of High-Pressure Processing to Assure the Storage Stability of Unfiltered Lager Beer. Molecules 2020; 25:molecules25102414. [PMID: 32455848 PMCID: PMC7287966 DOI: 10.3390/molecules25102414] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 05/16/2020] [Accepted: 05/19/2020] [Indexed: 11/16/2022] Open
Abstract
Due to the increasing popularity of unfiltered beer, new methods for its preservation are needed. High-pressure processing (HPP) was applied as a final treatment of packed beer in order to assure storage stability and to retain the desired product quality. Pressures of 250 MPa and 550 MPa for 5 min were used to process unfiltered lager beers. The impact of pressure on basic analytical characteristics was evaluated, and foam stability, the content of carbonyl compounds and sensory properties were monitored during two months of storage. Most of the basic analytical parameters remained unaffected after pressure treatment, and a beneficial effect on foam stability was demonstrated. Changes in the concentration of staling aldehydes were observed during storage. Some features of the sensory profile were affected by HPP as well as by the time of storage. Our study evaluated the suitability of HPP as a novel method for shelf-life extension of unfiltered lager beer.
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Nikolayev V, Akhmetvaliyev M, Gritsenko A, Shepelev V, Gimaltdinov I. Separation of brewer pellets in a vibratory-centrifugal centrifuge. BIO WEB OF CONFERENCES 2020. [DOI: 10.1051/bioconf/20202700101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The article reflects the process of dehydration of brewer pellets, as one of the ways to solve the problem of their utilization in order to obtain a highly concentrated feed for farm animals, which is an urgent task. The purpose of the study is to substantiate the interrelation between the technological and physical properties of the brewer pellets during the separation of brewer pellets into dense and liquid fractions in a continuous vibratory-centrifugal centrifuge and its main design and operating parameters. As a result of the research with the analytical method, process and physical properties of brewer pellets are determined when they are interacting with the perforated rotor blades of a vibratory-centrifugal centrifuge. The equations for the yield of the liquid fraction of brewer pellets through the rectilinear and curvilinear rotor blades are obtained, indicating the interrelation between process and physical properties of brewer pellets, which are necessary for determining the rational basic parameters of the proposed vibratory-centrifugal centrifuge.
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