Characterization and optimization of schizophyllan production from date syrup

Area of Science:

• Biotechnology
• Industrial Microbiology
• Biopolymer Production

Background:

• Schizophyllan is a valuable fungal exopolysaccharide with diverse applications.
• Current production methods often rely on expensive carbon and nitrogen sources.
• Exploring alternative, low-cost substrates is crucial for economic viability.

Purpose of the Study:

• To evaluate date syrup as a cost-effective substrate for schizophyllan production by Schizophyllum commune.
• To optimize fermentation conditions for maximizing schizophyllan yield.
• To characterize the schizophyllan produced from date syrup and assess the economic feasibility.

Main Methods:

• One factor-at-a-time (OFAT) approach to identify optimal carbon and nitrogen sources.
• Response surface methodology (RSM) for optimizing culture medium components and fermentation parameters.
• Submerged fermentation of Schizophyllum commune ATCC 38548.
• Characterization of the produced schizophyllan using techniques like FTIR, NMR, and molar mass determination.

Main Results:

• Date syrup and corn steep liquor were identified as effective nutrients.
• Optimized conditions (7.02% w/v date syrup, 0.10% w/v corn steep liquor, 7.68% v/v inoculum, 181 rpm agitation) yielded maximum schizophyllan production (8.5 g/l) and product yield (0.12 g/g).
• Characterization confirmed the purity and molecular properties of schizophyllan, with glycosidic linkage analysis showing characteristic peaks.

Conclusions:

• Date syrup is an efficient and economical substrate for schizophyllan production.
• Optimized submerged fermentation significantly enhances yield.
• This approach offers a substantial cost reduction (approx. 6-fold) in raw materials for schizophyllan manufacturing.