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The laboratory control of beer
Klinková, Lucie ; Pařilová, Kateřina (referee) ; Omelková, Jiřina (advisor)
This bachelor thesis is aimed on laboratory monitoring of raw materials for beer production, in-process monitoring and final product control. Theoretical part deals with variety of procedures needed to produce a quality final product. Practical part of thesis was done in a laboratory of a medium sized brewery in the Czech republic. The production of formentioned brewery is 300, 000 hectolitres of traditionally brewed beer per year. The quality control of wort and final product was done. In – process control was done to obtain the extract value and pH of wort. The clarity, color, pH, gravity, and the both apperental and real alcohol content, the degree of attenuation of apperental and real content of bitter substances was determined in final product.
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Možnosti chmelení piva za studena
Hlaváčková, Jana
This bachelor thesis deals with characteristics and possibilities of cold beer brewing. Its content is a specification of hops as a basic ingredient and its chemical composition. Main focuspoint are substances that give a beer its typical taste, description of a production process and characteristics of aromatic hop varieties used for cold hopping. Part of the thesis includes description of instruments used for cold hopping both abroad and in the Czech Republic and a bitterness specification using EBU and IBU units.
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The laboratory control of beer
Klinková, Lucie ; Pařilová, Kateřina (referee) ; Omelková, Jiřina (advisor)
This bachelor thesis is aimed on laboratory monitoring of raw materials for beer production, in-process monitoring and final product control. Theoretical part deals with variety of procedures needed to produce a quality final product. Practical part of thesis was done in a laboratory of a medium sized brewery in the Czech republic. The production of formentioned brewery is 300, 000 hectolitres of traditionally brewed beer per year. The quality control of wort and final product was done. In – process control was done to obtain the extract value and pH of wort. The clarity, color, pH, gravity, and the both apperental and real alcohol content, the degree of attenuation of apperental and real content of bitter substances was determined in final product.
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Evaluation of hop quality
Krofta, Karel
Kvalita chmele je posuzována v několika úrovních od sklizně přes zpracování až po dodávku zpracovaného chmele zákazníkům, kterými jsou ponejvíce domácí a zahraniční pivovary. V metodice jsou popsány nejdůležitější analytické metody, používané k hodnocení kvality chmele, uvedeny jejich přednosti, nedostatky a omezení. Důraz je kladen zejména na stanovení obsahu alfa kyselin, nejdůležitějšího kvalitativního parametru chmele, který lze stanovit několika způsoby s odlišným výsledkem. Důležitou součástí je pojednání o nežádoucích a cizorodých látkách ve chmelu, jejichž obsah je mnohdy limitujícím faktorem prodeje. Na základě výsledků chemických analýz lze s vysokou pravděpodobností určit identitu odrůdy a stupeň stárnutí chmele, ke kterému při skladování a zpracování zákonitě dochází.
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