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Belgian researchers have identified another source of inoculation – wooden kegs or foeders – for the production of lambic beers. The traditional production of lambic beer is by inoculation of must with ambient air, fermentation and maturation in wooden barrels. Until now, these barrels of lambic have only been examined with culture-dependent techniques, missing some of the microorganisms present. The research is published in the journal Applied and environmental microbiology.
In order to clarify the role of barrels and throats as an additional source of microbial inoculation, researchers determined the influence of drum characteristics and cleaning procedures on microbial communities on the barrel interior surfaces. . The researchers plastered and sequenced samples taken from the swabs obtained from the interior surfaces of different wooden barrels and threshers used for the production of traditional lambic beer in Belgium. The samples revealed that the microbial compositions of these surfaces differed statistically throughout the cleaning procedures of the casks applied. This helped to understand the complex process of fermentation and maturation of spontaneous lambic beer.
The microbial compositions of the inner surfaces of the barrels also differed statistically depending on the type of barrel, perhaps reflecting different features of the lambic barrels in terms of age, thickness and wood porosity. This research will contribute to the continuous optimization of the lambic beer production process as well as the cleaning procedures of wooden barrels.
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Material provided by American Society of Microbiology. Note: Content can be changed for style and length.
Journal reference:
- J. De Roos, D. Van der Veken, L. De Vuyst. The interior surfaces of the wooden barrels provide an additional source of microbial inoculation for lambic beer production.. Applied and environmental microbiology2018; DOI: 10.1128 / AEM.02226-18
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American Society of Microbiology. "Additional source of inoculation for the production of lambic beer." ScienceDaily. ScienceDaily, November 2, 2018.
American Society of Microbiology. (2018, November 2). Additional source of inoculation for lambic beer production. ScienceDaily. Retrieved November 4, 2018 from www.sciencedaily.com/releases/2018/11/181102131947.htm.
American Society of Microbiology. "Additional source of inoculation for the production of lambic beer." ScienceDaily. www.sciencedaily.com/releases/2018/11/181102131947.htm (accessed November 4, 2018).
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