Pavlína Horská, Kateřina Ševčíková

1. Pavlína Horská, Kateřina Ševčíková Faculty of Chemistry, Brno University of Technology

2. Beer

3. History of beer • world‘s oldest and most popular alcoholic beverage • 7th millennium BC → start the manufacture of beer inAncient Egypt and Mesopotamia • 19th century → start the industrial manufacture of beer • today → the brewing industry is a huge global business BC = before Christ Ancient = starověký Brewing industry = pivovarský průmysl

4. Main ingredients • water • starch source: barley, wheat, rice, oat • hop-plant • yeast • clarifying agent Starch source = zdroj škrobu Hop-plant = chmel Barley = ječmen Yeast = kvasnice Wheat = pšenice Clarifying agent = čeřidlo Oat = oves

5. Part of brewing • Mashing • Sparging • Boiling • Fermentation • Packaging Mashing = příprava zápary Sparging = vyslazování Fermentation = kvašení Packaging = balení

6. Mashing • mixture of water and starch source (known as mash) • enzymes • temperature

7. Sparging • extracts the fermentable liquid, known as wort, from the mash. • Mash is in the vessel (known as a lauter-tun), which has a porous barrier. • The brewer adds water to the lauter-tun and it rinses fermentable liquid from the grain in mash. Fermentable = zkvasitelný Wort = sladina Vessel = nádoba, nádrž Porous = porézní Brewer = sládek Rinse = vypláchnout

8. Boiling • Increase the concentration of sugar in the wort • one hour • Hops are added in order to extract bitterness, flavor and aroma from them. Bitterness = hořkost Flavor = vůně

9. Fermentation • The wort becomes beer • Equation: C6H12O6 (+ yeast) → 2CH3CH2OH + CO2 • uses yeast • without presence of oxygen • Beer is saturated by carbon dioxide. Saturate = nasytit

10. Packaging • final stage of the brewing process • Beer is prepared for distribution and consumation. • Beer is put into the bottles and kegs. Keg = soudek

11. Thank you very much for your kind attention