Spontaneous fermentation: the role of microorganisms in beer

The four main ingredients in most modern beer recipes are water, a starch such as barley (usually malted), hops and yeast. And each ingredient has a very specific role in the brewing process. Any home brewer knows that the quality of the water used in brewing beer can significantly impact the flavor of the finished product. For example, excessive amounts of fluoride in the tap water can alter the flavor (and then some) of beer, not to...

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