Enhanced laccase separation from fermentation medium using cryogel columns

Area of Science:

• Biochemistry
• Biotechnology
• Enzyme Engineering

Background:

• Laccase enzymes are oxidoreductases crucial for industrial processes like dye decolorization and biodegradation.
• Efficient and cost-effective purification methods are vital for laccase's commercial value.
• Current purification techniques can be complex and expensive, necessitating simpler alternatives.

Purpose of the Study:

• To develop and characterize cryogel columns for laccase purification.
• To optimize the purification process using Aspergillus niger-derived laccase.
• To evaluate the efficiency and applicability of cryogel-based purification for industrial use.

Main Methods:

• Synthesis of 2-hydroxyethyl methacrylate based cryogels with 1-vinylimidazole affinity ligand.
• Characterization of cryogel properties including swelling, surface area (BET), and morphology (SEM).
• Adsorption studies to determine optimal conditions (pH, concentration, flow rate, time, temperature) for laccase binding.

Main Results:

• Cryogel columns exhibited a high water uptake ratio (93%) and surface area (35 m²/g).
• Optimized conditions yielded a purification factor of 10.53 and an enzyme recovery of 86.7%.
• The cryogel purification method demonstrated effectiveness in removing laccase from fermentation medium.

Conclusions:

• Cryogel columns provide an effective and potentially scalable method for laccase purification.
• This approach simplifies purification, potentially reducing costs and complexity for industrial applications.
• The developed cryogel system is a promising candidate for industrial-scale enzyme recovery.