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Bioreactor Configurations and Instrumentation Quiz

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Bioreactor Configurations and Instrumentation Quiz

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Questions and Answers

What is a characteristic of tray bioreactors used at commercial scale?

They require minimal labor and large areas

They always use sterilizable and microporous bags for sterility maintenance

They are only applied for the Koji process

They may be perforated or non-perforated, and come in various sizes (correct)

What is a challenge associated with the use of tray bioreactors in industry?

They are highly efficient in heat removal

They are suitable for a wide range of product types

They require intensive labor and large areas (correct)

They have minimal sterilization requirements

What is an alternative method mentioned for maintaining sterility in tray bioreactors?

Discontinuously rotating drum operation

Exposure to controlled environment with ejectors and air filters

Implementation of continuous agitation

Use of sterilizable and microporous bags (correct)

What is an example of a solid state fermentation (SSF) bioreactor without forced aeration?

Trays Signup and view all the answers

What is a characteristic of horizontal drum bioreactors with forced aeration?

Agitation may occur continuously or intermittently Signup and view all the answers

What is a common challenge associated with the use of tray bioreactors in industry?

Difficulty in maintaining sterility Signup and view all the answers

What is an example of a solid medium used in tray bioreactors?

Wood Signup and view all the answers

What is the purpose of agitation in a horizontal drum bioreactor with forced aeration?

To remove heat accumulation in the substrate bed Signup and view all the answers

According to Durand (2003), what was the largest reactor cited in the literature for kinetic studies of Rhizopus?

200 L stainless steel rotating drum Signup and view all the answers

What is an alternative to maintain sterility in tray bioreactors?

Use of sterilizable and microporous bags Signup and view all the answers

What is the most significant problem in scale-up of solid state fermentation (SSF) bioreactors?

Intense heat generation and system heterogeneity Signup and view all the answers

What is a major challenge associated with microbial growth under aerobic conditions in SSF bioreactors?

Considerable production of heat Signup and view all the answers

Why are commercial designs of bioreactors absent in some bioprocesses involving solid state fermentation?

Lack of standardized processes and limited reproducibility Signup and view all the answers

What is the primary factor that makes it difficult to remove the heat produced during microbial growth in SSF bioreactors?

Absence of a free aqueous phase for heat removal Signup and view all the answers

Which parameter poses a challenge in controlling the environment within solid state fermentation (SSF) bioreactors?

Moisture level Signup and view all the answers