Wall-Immobilized Biocatalyst vs. Packed Bed in Miniaturized Continuous Reactors: Performances and Scale-Up

Area of Science:

• Biocatalysis and Sustainable Chemistry
• Chemical Engineering and Process Intensification

Background:

• Sustainable biocatalysis is gaining traction but requires cost reduction for wider industrial adoption.
• Enzyme immobilization and process intensification (batch to continuous) are crucial for optimizing biocatalytic syntheses.
• Flow bioreactors, including packed bed and wall-immobilized enzyme reactors, are central to continuous biocatalysis.

Purpose of the Study:

• To review current flow bioreactor technologies for enzyme immobilization.
• To benchmark packed bed reactors against wall-immobilized enzyme reactors.
• To identify strategies for enhancing wall-immobilized enzyme reactor performance and scalability.

Main Methods:

• Presentation of the current flow bioreactor technology portfolio.
• Application of key performance metrics for flow bioreactors.
• Benchmarking of recent scientific works and scale-up perspectives.

Main Results:

• Packed bed reactors are simple for lab-scale but face pressure drop issues at industrial scale.
• Wall-immobilized enzyme reactors offer lower pumping power but have limited enzyme loading capacity.
• A detailed analysis of scale-up challenges and industrial requirements for different reactor types.

Conclusions:

• Optimizing enzyme immobilization strategies is critical for cost-effective biocatalysis.
• Future research should focus on maximizing the performance of wall-immobilized enzyme reactors.
• Addressing the limitations of current flow bioreactor designs is essential for industrial implementation.