Cell Immobilization for Erythritol Production

Area of Science:

• Biotechnology
• Industrial Microbiology
• Biochemical Engineering

Background:

• Commercial erythritol synthesis relies on free-cell fermentation, which is energy-intensive.
• Cell immobilization offers potential economic and energetic advantages for erythritol production.

Purpose of the Study:

• To investigate the feasibility of cell immobilization for erythritol production using Moniliella pollinis.
• To evaluate the efficiency and stability of immobilized cells in a bioreactor system.

Main Methods:

• Moniliella pollinis cells were immobilized on cotton cloth within a 2-L bioreactor.
• Fermentation was conducted using red grape must supplemented with yeast extract.
• The performance of immobilized cells was compared to free-cell fermentation.

Main Results:

• Successfully immobilized Moniliella pollinis on cotton cloth for erythritol bioproduction.
• Achieved an erythritol concentration of 47.03 ± 6.16 g/L in 96 hours with a yield of 0.18 ± 0.04 g/g.
• Immobilized cells remained stable and operative for 456 hours, producing comparable erythritol levels to free cells.

Conclusions:

• Cell immobilization on cotton cloth is a feasible and efficient method for erythritol production.
• This technique reduces the need for fungal inocula preparation, lowering reagent costs and energy consumption.
• The developed immobilization system offers economic and energetic improvements for industrial erythritol bioproduction.