Under anaerobic conditions (where oxygen is absent) they metabolise the fuel by feeding off it and in doing so produce natural chemical reactions that produce a current.
Under aerobic or anaerobic conditions, nitrates could be used as nitrogen sources.
Under anaerobic conditions nitrates and nitrites are both reduced by a process called denitrification.
But these other microbes need strict anaerobic conditions to work.
Incubate under anaerobic conditions for the duration of the incubation period.
The flavor depends heavily on the type of Saccharomyces doing the eating, and very few strains perform well in the hostile anaerobic conditions inside a brewing tank.
Grass, chopped corn, and other fresh animal feeds, if stored under moist anaerobic conditions, will undergo a lactic-type mixed fermentation that produces pleasant-smelling silages.
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