Chapter 1 - Practical Mixed Culture Processes

Publisher Summary This chapter reviews the experimental and applied aspects of mixed culture studies. Mixed cultures remain of prime importance for waste treatment despite advances in alternative physiochemical processes. Soil, marine, and freshwater microbiology have begun to focus on mixed culture phenomena because little further progress can be expected from pure culture techniques. At present, numerous interactions take place between microbial communities and plants or animals. However, much research will be needed to gain adequate understanding of microbial interactions that determine the performance and stability of processes based on elective cultures. Also, many industrial processes based on defined mixed cultures are already important and progress continues to be rapid. Harrison and Wren (44) compared two processes for single-cell protein, one using a pure culture and the other a mixed culture. The mixed culture had superior stability and was more resistant to contamination and foaming. The potential advantages suggest that mixed cultures may also replace today's familiar pure culture processes.

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