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Fermentation process

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Fermentation Yeast is a microorganism containing an enzyme which will convert a sugar (glucose) solution into carbon dioxide and alcohol (ethanol). The word equation for fermentation is Glucose + yeast carbon dioxide + ethanol. Carbon dioxide gas bubbles out of the solution into the air leaving a mixture of ethanol and water. ...read more.


An enzyme in yeast acts on the natural sugar in malt (to make beer) and grapes (to make wine). When the alcohol concentration reaches about 10%, the alcohol damages the yeast and fermentation stops. In a batch process the reaction vessel must be emptied and cleaned and then refilled with the new starting materials. ...read more.


The harmful effects (physical and social) of drinking excess alcohol are widespread and reach all parts of society. Ethanol can be made on a large scale for use as a fuel or solvent by the hydration of ethene or the fermentation of sugar cane. Sugar cane is a renewable resource. Renewable means that the resource can be replaced. For example more sugar cane can be grown. Compare this with the use of fossil fuels (the source of ethene) which are a non-renewable resource. ...read more.

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