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Two-stage fermentation process for enhanced mannitol production using Candida magnoliae mutant R9
Laxman S Savergave1, Ramchandra V Gadre, Bhalchandra K Vaidya
1Chemical Engineering and Process Development Division, National Chemical Laboratory, Pune, India.
Bioprocess and Biosystems Engineering
|July 4, 2012
Summary
Researchers enhanced mannitol production using mutant Candida magnoliae. A novel two-stage fermentation process achieved a record 240 g/L yield, offering a highly efficient and pure biotechnological method.
Area of Science:
- Biotechnology
- Microbial Fermentation
- Metabolic Engineering
Background:
- Candida magnoliae is a yeast capable of producing mannitol.
- Optimizing fermentation conditions is crucial for maximizing mannitol yield.
- Previous methods for mannitol production have limitations in yield and purity.
Purpose of the Study:
- To develop an efficient fermentation process for high-yield mannitol production.
- To identify and characterize superior mannitol-producing mutants of Candida magnoliae.
- To optimize fermentation parameters for enhanced mannitol biosynthesis.
Main Methods:
- Mutagenesis of Candida magnoliae using UV radiation and chemical agents.
- Screening for high reductase activity using 2,3,5-triphenyl tetrazolium chloride.
- Optimization of fermentation conditions including media composition and two-stage cultivation.
- Implementation of a two-stage fermentation strategy with distinct growth and production phases.
Main Results:
- A mutant R9 exhibited significantly higher mannitol production (46 g/L).
- Preliminary optimization increased mannitol yield to 60 g/L.
- The two-stage fermentation strategy achieved a record yield of 240 g/L mannitol.
- High yield (81%) and productivity (4 g/L/h) were obtained with no by-products.
Conclusions:
- Mutant strain R9 of Candida magnoliae demonstrates high potential for industrial mannitol production.
- The developed two-stage fermentation process is highly effective for maximizing mannitol yield and purity.
- This study presents a significant advancement in biotechnological mannitol production.
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