ocr: The Brewing - - Process The next stage is fermentation, the most critical process of all. The hopped wort is cooled and RAWMATERALS PREPARATION BREWING BYI PRODUCTS run into fermentation vessels. Yeast convert is the added, natural and it sugars begins into to BARLEY A 90 MASHING alcohol, carbon dioxide and a - A ANIMAL FEEDS range of subtle flavours. WATER Historically, all British ales and stouts were termented with a OOPPER yeast that rose to the top of the HOPS beer, and in many cases this FERTILSER method is still used. These top a * fermenting beers develop cloud like, foaming heads. Whe ...