Chapter 21

Beer Spoilage Organisms

Spoilage by Molds

Molds are non-chlorophyll-bearing plants that range in size from a single spore to large cell aggregates. Most molds are able to grow well at ordinary temperatures, the optimum range being from 25 to 30 degrees C (77–86°F), although some species can grow at 35 degrees C (95°F) or even higher temperatures and others at much lower temperatures. Molds are normally aerobic organisms and can grow over a wide pH range, although most species prefer an acid pH.

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