Question

The terms “Concentrated effluent” and “Diluted effluent” are used in internal feedback systems.

(a) True

(b) False

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This intriguing question originated from Comparison of Batch and Continuous Culture in Industrial Processes topic in division Microbial Growth Kinetics of Bioprocess Engineering

Answer 1

The correct option is (b) False

To elaborate: In internal feedback systems, effluent is removed from the vessel in two streams:

1) Filtered stream

2) Unfiltered stream

Filtered stream serves the purpose of feedback, whereas, Unfiltered stream is utilised for product harvesting.

In external feedback systems, Effluent from fermenter is fed through a separator.

Two effluent streams are: 1) Concentrated stream

2) Diluted stream

Wherein, Concentrated stream serves as feedback and Diluted is used for product harvesting.