Close-up of the ColiMinder

Real-time monitoring | From Austria comes an interesting new technology that will permanently change the water treatment processes in the beverage industry and make them more efficient: the ColiMinder, an on-line instrument for fully automatic monitoring of microbiological water quality in the beverage industry.

Taster sniffing a beer glass at a sensory training

Standardization | Quality and product safety are at the heart of the core demands of consumers. For this reason, most breweries have developed and now routinely implement comprehensive quality assurance measures as an essential part of their product analysis. Today, breweries document the product quality attained by applying these measures in detail through meeting predetermined specifications and issuing certificates of analysis, the continuity of which are reliably checked on a regular basis using standard procedures. Among the tools available to breweries is sensory analysis, a field that is becoming increasingly important in this context.

Ripening barley (Nick Fewings on Unsplash)

Beer ageing | During the malting process, malt modification is influenced by targeted adjustment of germination parameters (technological factors). The level of precursors in the malt, formed during malting, makes a significant contribution to beer ageing. This article describes, in particular, the precursor potential, formed from non-enzymatic degradation of polysaccharides.

Coliform bacteria (Photo: Gerd Altmann on Pixabay)

Brewery hygiene | If we look back on 50 years of brewing microbiology, we gain a number of extremely interesting insights. Can we draw a positive conclusion here or are there also negative aspects that have to be taken into account?

Bacteria (Photo: Gert Altmann on Pixabay)

Beer-spoilage potential | In the food industry, lactic acid bacteria play a special role, they have become important both as beneficials and as spoilers. Lactic acid bacteria also have these two opposite characteristics in breweries.

Cylindroconical tanks in a fermentation cellar

Practical findings | Beer loss has always been one of the biggest challenges to breweries with regard to efficient beer production and maximisation of the beer sold. Especially when making hoppy craft beers, where dry hopping is often practiced, the beer yield is drastically reduced. Thanks to the latest practical findings from a long-term BrauKon trial, the amount of beer loss can now be significantly reduced by adjusting two characteristics in the cylindroconical vessel: essential here are a special surface finish and a defined cone angle.

yeast cells (photo: Kateryna Kon/Science Photo Library)

Vibrating sieve | Beck’s – the name is legend and the advertising campaign featuring the Alexander von Humboldt barque with its green sails cutting through the waves to “Sail away” familiar to many of us since 40 years. GEA project engineer Clemens Fries claims that this is “an inspiring environment in which to perform ‘minor open-heart surgery’.” Fries is namely responsible for the new special yeast sifting plant that’s now been integrated in Bremen as a fully-automatic process line.

Woman tasting whisky (Photo: Charl Folscher on Unsplash)

Trained senses | Is a sensory panel suitable as an “analysis instrument” for monitoring the quality of spirits? Can training a panel specifically for detecting wood-derived substances, key aroma substances, color and faults common in whiskey supplement, or even replace, laboratory analysis for measuring individual substances? Are there limits, and if so, what are they? This is the third installment in the series, which began with the basics of barrel aging in part 1 and continued with the laboratory analysis of barrel-aged spirits in part 2 [1, 2]. In this installment, the authors will consider another measuring device: human beings.

Oak casks on a shelf (Photo: Anthony Riera on Unsplash)

Simulated barrel maturation | How do the aromas and color of spirits develop during barrel maturation? What roles do the degree of toasting and the type of wood play? What is the most practical method for determining the phenolic compounds and the volatile substances in wood, such as higher alcohols, aldehydes, esters and lactones? With gas and liquid chromatography? The authors recreated the process of aging in wooden barrels in the laboratory and analyzed the processes of extraction, color and aroma formation.

Dr. Martin Zarnkow, chairman of MEBAK, is looking forward to the online method compendium

For over 50 years the Central European Commission for Brewing Analysis (MEBAK®) has published methods of analysis for raw ingredients, wort, beer and beer-based beverages.

Whiskyglas and bottle (Photo: Felix Wolf on Pixabay)

Whiskey, Rum & Cognac | Which woods are utilized for wine and spirits barrels? What does toasting and charring do? Why is wood able to generate such complex aromas, and which key aroma compounds can be extracted through the maturation of spirits in barrels? In a three-part series, the authors describe the development of methods for measuring the characterization of wood-based flavors in spirits. Part 1 introduces the basics of maturation in wooden barrels.

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