Kvasny Prum. 2011; 57(7-8): 285-289 | DOI: 10.18832/kp2011033

Possible use of Collection VUPS yeasts for the HGB technology.Peer-reviewed article

Petra KUBIZNIAKOVÁ

Výzkumný ústav pivovarský a sladařský, a.s., Lípová 15, 120 44 Praha 2

The new processes for beer production place bring higher demands on the raw materials and production strain brewery yeast. High gravity hopped wort for HGB technology beer production is not optimal environment for brewery yeasts. Higher osmotic pressure and ethanol are limiting factors for prosperous process of primary fermentation. One of the sources of production brewery yeasts is the collection RIBM. By the sampled strains (9,14,98,111,112,133) were tested their ability attenuate hopped wort about original gravity 16 and 20 % w/w in conditions of laboratory fermentation tests. Based on the results, the strains 9, 111 and 112 could enlarge the offering of brewer's yeast production strains with strains tolerant to osmotic pressure and ethanol, suitable/optimal for the HGB technogy.The new processes for beer production place bring higher demands on the raw materials and production strain brewery yeast. High gravity hopped wort for HGB technology beer production is not optimal environment for brewery yeasts. Higher osmotic pressure and ethanol are limiting factors for prosperous process of primary fermentation. One of the sources of production brewery yeasts is the collection RIBM. By the sampled strains (9,14,98,111,112,133) were tested their ability attenuate hopped wort about original gravity 16 and 20 % w/w in conditions of laboratory fermentation tests. Based on the results, the strains 9, 111 and 112 could enlarge the offering of brewer's yeast production strains with strains tolerant to osmotic pressure and ethanol, suitable/optimal for the HGB technogy.

Keywords: HGB, brewer's yeasts, wort, fermentation, osmotic pressure tolerancy

Received: May 23, 2011; Accepted: June 19, 2011; Published: July 1, 2011