Hydrocarbon uptake in hydrocarbon fermentations

Area of Science:

• Biotechnology
• Microbial Physiology
• Biochemical Engineering

Background:

• Candida lipolytica is a yeast capable of utilizing hydrophobic substrates.
• n-hexadecane is a long-chain alkane often used as a carbon source for microbial growth.
• Batch fermentation is a common method for cultivating microorganisms.

Purpose of the Study:

• To determine the growth kinetics of Candida lipolytica (strain ATCC 8662) on n-hexadecane.
• To assess the contribution of aqueous phase cells to overall fermentation kinetics.
• To investigate the influence of interfacial properties on yeast growth.

Main Methods:

• Cultivation of Candida lipolytica in a defined medium with n-hexadecane.
• Batch fermentation experiments.
• Analysis of growth kinetics and interfacial parameters.

Main Results:

• The study quantified the growth of Candida lipolytica on n-hexadecane.
• The relative importance of aqueous phase growth was evaluated.
• The effects of interfacial tension, unoccupied interfacial area, and pseudosolubility on specific growth were analyzed.

Conclusions:

• The findings provide insights into the microbial utilization of hydrophobic substrates.
• Understanding these factors is crucial for optimizing bioprocesses involving Candida lipolytica.
• This research contributes to the field of microbial hydrocarbon metabolism.