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Acetic acid bacteria (AAB) has found applications in food technology, including beverages and vinegar. Generally, AAB shows several beneficial properties and has technological usefulness. Properly selected and tested strains of this group of bacteria may constitute a new and interesting solution among starter cultures for functional food. Therefore, the study aimed to develop a sour beer technology, based on the novel strain Gluconobacter oxydans H32. The microbiological, physical-chemical (HPLC method), and sensory (QDP method) quality were determined during 6 months of storage of dark and light beer samples. The AAB count at the beginning of storage was approximately 8 log CFU mL−1, and 6 log CFU mL−1 after 6 months of storage. As a result of the metabolic activity, acetic acid, gluconic acid, and ascorbic acid were detected in the samples. The light beer had a significantly better sensory quality, especially sample BPGL with the addition of G. oxydans H32 starter culture. It was found that it is possible to develop a functional beer with the novel strain Gluconobacter oxydans H32. These Sour Ale craft beers were not only a good source of H32 strain but also its pro-health metabolites.

The Novel Strain of Gluconobacter oxydans H32 Isolated from Kombucha as a Proposition of a Starter Culture for Sour Ale Craft Beer Production