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Quality assurance

Verification of cleaning performance of bottle washing machines

Inspection of empties | Regular verification of cleaning performance of bottle washers in breweries is important in order to ensure perfect product quality and product safety. This is the reason why the Research Center Weihenstephan for Brewing and Food Quality, Freising, Germany, in cooperation with five breweries, validated a test series with standardised contaminated bottles. This should enable breweries to carry out their own checks.

Color calculations and measurements (Part 1): Evolution of measurements

Measuring beer color | This is the first in a three-part series of articles about the nature of beer color, as well as the difficulty of accurately quantifying color both at the recipe design stage and in the finished beer. Part 1 explores the nature of color in general and the historical evolution of beer color measurements. Part 2 examines the differences and similarities of the most common equations used by today’s brewers around the world for calculating beer color – not after the fact in the laboratory – but in advance during recipe formulation. Finally, part 3 analyzes three test beers brewed specifically for this study. It compares the color predictions for these brews made by the different beer color formulae outlined in part 2 to the actual color measurements of the same brews made in the laboratory. This comparison allows practical brewers to select which equation might be the most advantageous for them to use at the recipe design stage.

Real forces working on our bottles and cans

Feel the process | The packaging of products is something that, apart from the beer itself, speaks to the consumers. Packaging is present in all parts of the production process, involves the majority of plant departments, and runs through all stages of the supply chain. Therefore, understanding what our bottles and cans experience, or in human words: what they “feel” in the process, turns out to be crucial to the brewing businesses and – as various real-life cases show – leads to wonderful benefits. Especially, when the “feeling” is translated to data.

Characteristics of forced ageing

Ageing behaviour | Forced ageing at 40 °C is one of the most common methods for assessing sensory stability of pale lager beers. However, different aroma profiles frequently arise in practice compared to natural ageing at 20 °C. The present article describes the ageing characteristics of pale lager beers during forced and natural ageing, both in sensory and in analytical terms. The contribution is based on research results that have been published in BrewingScience, May/June 2018, volume 71.

S. diastaticus: A yeast loved – and feared

Over-attenuating yeast | At the turn of the century, hardly anyone in Germany was familiar with this yeast. Nowadays, Saccharomyces diastaticus has virtually become a household name, especially among craft brewers. Some use it to brew novel beers in the style of those from Belgium. Others, however, fear this yeast and despise it as a beer spoiler, conducting extensive analyses to detect the merest traces of its presence in an effort to eradicate it in their breweries.

Enzymes and sustainable brewing

Sustainable and economical | A new generation of conscious consumers has driven significant change in the brewing industry. High-quality beer is now available in a range of flavors and varieties that align with consumers’ expectations, including low-alcohol, alcohol-free and gluten-free beers. But taste is not the only driver of new product development; rising concerns over the environment mean that sustainably produced beer is fast becoming people’s top choice. Now the question is, how can brewers improve the sustainability of their processes and end products to meet demand while also continuing to work economically?

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Beer monopoly podcast No. 9: Direct to consumer

It was a remarkable admission by James Watt, one of the founders of Scottish craft brewer BrewDog: He said that in March 2020 he broke down in tears when the severity of covid-19 became clear: BrewDog had lost almost 70 percent of its revenue overnight, almost all of its 100 bars were closed, most of its export markets stopped ordering. Pivoting its website to prominently feature its online shop proved a way out. BrewDog ended a potentially ruinous year profitably. So what can craft brewers learn from BrewDog’s e-commerce model?