Kontinuální hlavní kvašení piva pomocí kvasinek imobilizovaných na mláto - Vliv provozních podmínek

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22330%2F04%3A00012754" target="_blank" >RIV/60461373:22330/04:00012754 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Continuous primary fermentation of beer with yeast immobilized on spent grains - The effect of operational conditions

Popis výsledku v původním jazyce

The objective of the work was to optimize the operational conditions (aeration and temperature) in terms of volumetric productivity and organoleptic quality of green beer. The system consisted of an internal-loop airlift reactor and a carrier material prepared from spent grains, a brewing by-product. The immobilized biomass, in amount from 2 to 7-fold greater than free biomass, contributed by 45-75 % to the total fermentation. The volumetric productivity of the continuous system was up to 5 times higherthan of the batch fermentation. An optimum higher alcohols to esters ratio in green beer was found at zero air feed (mixing induced by pure CO2) and temperatures 13 - 16 oC. At high total biomass concentration the diacetyl formation was low and the volumetric productivity of the system was high. Therefore, the amount of immobilized biomass in the reactor has to be kept high by regular replacement of the carrier losses.

Název v anglickém jazyce

Continuous primary fermentation of beer with yeast immobilized on spent grains - The effect of operational conditions

Popis výsledku anglicky

The objective of the work was to optimize the operational conditions (aeration and temperature) in terms of volumetric productivity and organoleptic quality of green beer. The system consisted of an internal-loop airlift reactor and a carrier material prepared from spent grains, a brewing by-product. The immobilized biomass, in amount from 2 to 7-fold greater than free biomass, contributed by 45-75 % to the total fermentation. The volumetric productivity of the continuous system was up to 5 times higherthan of the batch fermentation. An optimum higher alcohols to esters ratio in green beer was found at zero air feed (mixing induced by pure CO2) and temperatures 13 - 16 oC. At high total biomass concentration the diacetyl formation was low and the volumetric productivity of the system was high. Therefore, the amount of immobilized biomass in the reactor has to be kept high by regular replacement of the carrier losses.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

EI - Biotechnologie a bionika

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2004

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of the American Society of Brewing Chemists

ISSN

0361-0470

e-ISSN

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Svazek periodika

62

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

29-34

Kód UT WoS článku

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EID výsledku v databázi Scopus

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