Consideration of Maintenance in Wine Fermentation Modeling

Area of Science:

• Biotechnology
• Microbial Fermentation
• Biochemical Engineering

Background:

• Wine fermentation is a complex microbial process crucial for winemaking.
• Existing models of wine fermentation vary in complexity and accuracy.
• Understanding nitrogen metabolism is key to optimizing fermentation.

Purpose of the Study:

• To develop a simplified yet accurate model for wine fermentation.
• To investigate the role of nitrogen consumption not leading to biomass.
• To demonstrate the equivalence between a maintenance term and variable yield.

Main Methods:

• Developed a simple fermentation model incorporating a maintenance term.
• Validated the model against existing literature simulations.
• Compared model predictions with experimental wine fermentation data.

Main Results:

• The proposed model successfully reproduced simulations from existing literature.
• The model accurately predicted experimental wine fermentation data.
• The maintenance term was shown to represent nitrogen consumption not incorporated into biomass.
• Incorporating a maintenance term is mathematically equivalent to using a variable yield.

Conclusions:

• A simple model with a maintenance term offers a robust approach to simulating wine fermentation.
• The maintenance term provides a valuable parameter for estimating variable yield from data.
• This model enhances the understanding and prediction of wine fermentation dynamics.