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Uniform cross-linked cellulase aggregates prepared in millifluidic reactors.

Le Truc Nguyen1, Kun-Lin Yang1

  • 1Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117576, Singapore.

Journal of Colloid and Interface Science
|June 10, 2014
PubMed
Summary

Uniform cross-linked cellulase aggregate (XCA) was prepared using a millifluidic reactor. This insoluble enzyme catalyst (XCA-Si) efficiently hydrolyzes carboxymethyl cellulose (CMC) and is stable at high temperatures.

Keywords:
CellulaseCross-linked enzyme aggregateMillifluidic

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Area of Science:

  • Biocatalysis
  • Enzyme Engineering
  • Materials Science

Background:

  • Cellulase is a key enzyme for biomass hydrolysis.
  • Free cellulase is often unstable and difficult to recover.
  • Developing stable and recyclable cellulase catalysts is crucial for industrial applications.

Purpose of the Study:

  • To develop a method for preparing uniform cross-linked cellulase aggregates (XCA).
  • To evaluate the catalytic activity and stability of XCA when immobilized on silica gel (XCA-Si) for carboxymethyl cellulose (CMC) hydrolysis.

Main Methods:

  • Preparation of XCA using a millifluidic reactor with precise control over mixing.
  • Immobilization of XCA onto silica gel (XCA-Si).
  • Assessing the enzymatic activity and stability of XCA-Si in CMC hydrolysis under various conditions.

Main Results:

  • Uniform XCA particles (200-400 nm) were successfully synthesized.
  • XCA-Si demonstrated high activity at pH 4.8 and 50°C, similar to free cellulase.
  • XCA-Si exhibited enhanced stability at temperatures above 60°C and could be recycled at least 5 times.

Conclusions:

  • Millifluidic reactors enable precise control for preparing uniform XCA.
  • XCA-Si serves as a robust, recyclable, and stable biocatalyst for CMC hydrolysis.
  • This approach offers a promising strategy for developing efficient and reusable enzyme systems.