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Single cell protein production from beet pulp by mixed culture
1Botany Department, Faculty of Science, Alex. Univ., Egypt.
Microbiologia (Madrid, Spain)
|April 1, 1992
Summary
Mixed cultures of Trichoderma reesei and Kluyveromyces marxianus efficiently convert beet pulp into high-yield single-cell proteins (SCP). Optimized conditions increased protein yield to 54% and conversion efficiency to 41.8%.
Area of Science:
- Microbiology
- Biotechnology
- Food Science
Background:
- Beet pulp (BP) is an abundant lignocellulosic byproduct with potential for bioconversion.
- Single-cell protein (SCP) production using microbial fermentation offers a sustainable protein source.
Purpose of the Study:
- To evaluate the efficacy of mixed microbial cultures for enhanced SCP production from BP.
- To optimize fermentation conditions for maximizing protein yield and BP conversion efficiency.
Main Methods:
- Cultivation of mixed cultures of Trichoderma reesei and Kluyveromyces marxianus on BP-containing media.
- Optimization of BP concentration and yeast extract substitution in the basal medium.
- Analysis of single-cell protein (SCP) yield and BP conversion efficiency.
Main Results:
- The mixed culture of T. reesei and K. marxianus achieved high SCP yields (51%) and efficient BP conversion (39.4%).
- Substituting yeast extract and increasing BP concentration to 4% significantly enhanced performance.
- Optimized conditions resulted in maximum protein yields of 54% and BP conversion efficiency of 41.8%.
Conclusions:
- Mixed microbial fermentation, particularly with T. reesei and K. marxianus, is a viable strategy for high-value SCP production from beet pulp.
- The resulting protein contains all essential amino acids, comparable to established protein sources.
- This approach offers a sustainable and efficient method for valorizing agricultural byproducts into protein-rich biomass.