Beer Enzyme

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Product name:Beer Enzyme
Product description:Beer is an undistilled alcoholic bewerage produced from fermentation of barley malt by yeast, especial1y S. cerevisiae or S. carisbergensis. Generally, other materials rich in starch, e.g., wheat, maize, rice, etc., are also added to increase the amount of fermentable sugars and to reduce the relative costs of fermentation; these are called adjuncts.
Barley malt is prepared by soaking the grains in water, allowing them to germinate at 17°C, and then drying them at 65°C once the appropriate stage of germination is reached. For beer preparation the malt is powdered, mixed with warm water at 70°C and pH 5.0; this is called mashing.
Mashing results in a partial hydrolysis of starch and proteins. The mash is filtered and the filtrate, called 'beer wort', is used for fermentation after adequate saccharification. The wort is boiled with hops (papery scales of female flowers of Humulus lupulus); this stops saccharification, adds flavour and aroma and provides mild antibacterial activity.
The wort is cooled and inoculated with the appropriate strain of yeast; fermentation is allowed at low temperatures (5-15°C) for 5-10 days. The fermented wort is cooled to 0°C and stored for several months to eliminate off-flavours and to improve the characteristics of the beer.
Generally, the enzyme activities needed for saccharification (of adjuncts also) before fermentation are provided by the malt. Ordinarily, saccharification is stopped by boiling the wort when about 75% of the starch has been converted into fermentable sugars. The following enzymes are employed in beer production to achieve specific objectives.
1. α-Amylases and β-glucanase are used for increased and rapid saccharification.
2. Neutral proteases are added to the wort to hydrolyse proteins and to increase the fermentation rate .in the later stages.
3. Cellulases are used to digest barley glucans, particularly when wheat is used as an adjunct.
4. Papain is added to the beer during the later post-fermentation stages to hydrolyse the proteins and prevent the occurrence of 'chillhaze'.
5. Glucoamylase and/or fungal α-amylase are used during fermentation to produce low calorie or 'light' beers.
6. A variety of distilled alcoholic drinks, e.g., whisky, rum, vodka, etc., are prepared by fermentation of a large number of substrates rich in carbohydrates. Some of these substrates, e.g., molasses (rum), grapes (brandy), etc., are rich in fermentable sugars; in such cases, heat stable α-amylases from bacteria are used for saccharification.

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Bolise Co., Ltd.
Tel: +86 592 536 5868
Tel: +86 189 6516 2351