Cellulase Production by Ultraviolet-Derived Mutant Trichoderma sp. Mut-4 Under Submerged Fermentation: Parameter...

Area of Science:

• Microbiology
• Biotechnology
• Enzyme Engineering

Background:

• Submerged fermentation (SmF) is crucial for industrial enzyme production.
• Optimizing culture conditions is key to maximizing enzyme yield.
• Trichoderma sp. is a well-known producer of cellulase enzymes.

Purpose of the Study:

• To optimize medium formulation and culture conditions for enhanced cellulase production by Trichoderma sp. Mut-4 using SmF.
• To evaluate the impact of carbon source blending, nitrogen source, and initial pH on cellulase activity and productivity.
• To assess the scalability of optimized conditions from flask to reactor scale.

Main Methods:

• Utilized the one-factor-at-a-time (OFAT) method for parameter optimization.
• Investigated various carbon source ratios (Avicel:cellulose), nitrogen sources (yeast extract), and initial pH levels (5.5).
• Compared cellulase production and protein concentration at flask and reactor scales.

Main Results:

• Optimal conditions identified: 3:1 Avicel-to-cellulose ratio, yeast extract as nitrogen source, and initial pH of 5.5.
• Achieved earlier initiation of cellulase production.
• Increased cellulase component activity by 1.17-1.43 fold (flask) and 1.3-2.0 fold (reactor).
• Enhanced protein concentration significantly at both scales.

Conclusions:

• Optimized SmF parameters significantly improve cellulase activity and productivity of Trichoderma sp. Mut-4.
• The optimized strain demonstrates high potential for cost-effective, large-scale cellulase production.
• Further research could explore additional optimization strategies for even greater yields.