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Bioprocess Engineering: Basic Concepts, Third Edition by Matthew DeLisa, Fikret Kargi, Michael L. Shuler

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16. Bioprocesses Utilizing Mixed Cultures

The dynamics of mixed cultures (or multiple species in culture) are important considerations in some commercial fermentations. They are critical to understanding the response of many ecological systems to stress. The use of organisms with recombinant DNA has added another dimension to our consideration of how cells within a population interact with each other.

Many food fermentations, such as cheese manufacture, depend on multiple interacting species. The biological treatment of wastewaters relies on an undefined complex mixture of microorganisms. The ratio of various species in the treatment process is critical; sudden shifts in the composition of the population can lead to failure of the unit to meet ...

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