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Fermentation/Maturation

Hop solids separated after extraction

Dry hopping system | In this final third part of the series of articles, the significance of the results from the second part for plant and process engineering in an industrial environment is highlighted and the advantages provided by such systems are presented based on sample projects already installed. Results are discussed and summarised at the end.

New yeast strain | LalBrew NovaLager™ is a true bottom fermenting Saccharomyces pastorianus hybrid from a novel lineage that has been selected to produce clean lager beers with distinct flavor characteristics and superior fermentation performance. This robust lager yeast strain with ideal brewing properties, including fast fermentations and high attenuation, has recently become commercially available.


Sterile pitching yeast | Yeast quality exerts a huge influence on beer quality. A flawless and uncomplicated fermentation can only be ensured if wort is pitched with vital yeast. However, this is easier said than done – in reality, yeast management and propagation require significant investments in both time and money. Furthermore, this essential aspect of brewing does not always receive the attention it deserves. A new product from the Yeast Center at the Research Center Weihenstephan for Brewing and Food Quality not only lessens the workload but also guarantees microbiological safety.


Aroma extraction | Dry hopping poses challenges for brewers all over the world. These range from high beer losses, significant effluent pollution, low extraction efficiency to the hop creep effect. This three-part series of articles highlights the main concerns and provides an approach for finding a solution. The approach presented ranged from lab tests with just a few litres up until first industrial projects with batch sizes of more than 3500 kg of hops.


Molecular basis | Flocculation is an important facet of yeast behavior which is widely exploited in the brewing industry as an effective, low cost and natural mechanism for yeast removal from beer. This review aims to briefly summarize the current understanding of the underlying molecular biology involved in flocculation, as a condensed version of the review article “Molecular Basis and Regulation of Flocculation in Saccharomyces cerevisiae and Saccharomyces pastorianus – a Review” originally published in BrewingScience, 74 (March/April 2021).


High seas and world records | The first installment in this series (BRAUWELT International no. 1, 2022, pp. 30–34) followed the trail from the creation of the wooden beer keg to its role in the Hanseatic League and in sea voyages during the Age of Exploration. The second installment (BRAUWELT International no. 2, 2022, pp. 135–137) was devoted to recounting the struggle seafarers faced against the disease scurvy. In this final installment, Dr. Markus Fohr discusses the beer produced on modern cruise ships and how the wooden barrel has found its way into our language and even into world records.


Manuka beer | The first installation in this three-part series (refer to BRAUWELT International no. 1, 2022, pp. 30–34) described the origins of wooden beer barrels in antiquity, their use by the Hanseatic League and on sea voyages during the Age of Exploration. Those who sailed the Seven Seas were often confronted with an uninvited guest: scurvy, an insidious disease caused by vitamin deficiency. Part 2 in this series is devoted to the topic of how sailors fought scurvy and the crucial role played by spruce beer in doing so ...


A Seaworthy Transport Container | BRAUWELT author Dr. Markus Fohr takes us on the wild barrel ride that beer has taken through history. He begins part 1 on the “path into the woods” with the invention of the wooden barrel and its role in antiquity up through to the sea voyages in the Age of Discovery.


Yeast biodiversity | During the Corona crisis, some brewers used free capacities for product development. Novel maltose-negative yeasts from the “Hefejagd” (Yeast Hunt) project of the Research Center Weihenstephan formed the basis for more yeast biodiversity. This contribution looks at the tried and tested production of a non-alcoholic beer using Saccharomycodes ludwigii and analyses the yeast strains Cyberlindnera misumaiensis, Cyberlindnera saturnus as well as Kluyveromyces marxianus and their properties.


Developers want feedback | On October 1, 2020, Dr. Mark Schneeberger assumed leadership of Application Development Beverage & Beer at GEA in Kitzingen, Germany. He succeeded Dr. Rudolf Michel, who went into well-deserved retirement at the end of March 2021. BRAUWELT interviewed Dr. Schneeberger about his new position, one year on.


Eye-catching fermentation vats | It’s not only true of top-fermented beer styles that fermentation in a low, open tank enhances their taste and aroma. Tanks of the latest generation are made of stainless steel and fully automatically CIP-able – and can thus be used in 21st-century breweries without any reservations whatsoever. They have the ability to lend beer an emotional appeal that fascinates consumers.