A reusable multipurpose magnetic nanobiocatalyst for industrial applications

Area of Science:

• Biotechnology
• Nanotechnology
• Enzyme Engineering

Background:

• Enzyme immobilization enhances stability and reusability.
• Magnetic nanoparticles offer advantages for catalyst recovery and handling.
• Pectinex 3XL contains pectinase, xylanase, and cellulase activities for biomass conversion.

Purpose of the Study:

• To develop a multipurpose magnetic nanobiocatalyst by conjugating Pectinex 3XL onto modified magnetic nanoparticles.
• To evaluate the activity, stability, and kinetic properties of the immobilized enzyme.
• To assess the nanobiocatalyst's performance in juice clarification and bioethanol production.

Main Methods:

• Conjugation of Pectinex 3XL onto 3-aminopropyl triethoxysilane activated magnetic nanoparticles.
• Characterization of nanobiocatalyst using Dynamic Light Scattering (DLS) and Atomic Force Microscopy (AFM).
• Assay of enzyme activities (pectinase, xylanase, cellulase), thermal stability, kinetic parameters, and reusability.
• Application in pineapple and orange juice clarification and hydrolysis of pretreated wheat straw for bioethanol production.

Main Results:

• Nanobiocatalyst retained significant enzyme activities: 87% pectinase, 69% xylanase, 58% cellulase.
• Enhanced thermal stability at 70°C and retained kinetic parameters (Km, Vmax).
• Successful reuse up to the 5th cycle with high activity in organic solvents and chemical reagents.
• Increased bioethanol yield by 1.4-fold from pretreated wheat straw compared to free enzyme.

Conclusions:

• The developed magnetic nanobiocatalyst offers a stable, reusable, and efficient platform for enzymatic applications.
• Immobilization on magnetic nanoparticles improves enzyme performance and facilitates separation.
• The nanobiocatalyst demonstrates significant potential in food processing and biofuel production.