Mild Fractionation for More Sustainable Food Ingredients.

Area of Science:

• Food Science and Technology
• Sustainable Processing
• Ingredient Functionality

Background:

• Increasing global challenges of food shortages, energy costs, and raw material scarcity necessitate a reduction in the food industry's environmental footprint.
• Traditional extensive wet processing methods for food ingredients, while achieving high purity, contribute significantly to environmental impact due to energy-intensive steps like heating and dehydration.

Purpose of the Study:

• To provide an overview of resource-efficient processes for food ingredient production.
• To describe the environmental impact and functional properties associated with different processing methods.
• To highlight the benefits of milder refining techniques for sustainability and ingredient quality.

Main Methods:

• Comparison of extensive wet processing with milder wet alternatives (e.g., salt precipitation, water-only fractionation) and dry fractionation techniques (air classification, electrostatic separation).
• Evaluation of environmental impact, focusing on energy consumption and resource use.
• Assessment of functional properties of ingredients obtained through various methods.

Main Results:

• Extensive wet processing has the highest environmental impact, primarily from heating and dehydration.
• Milder processing methods, including dry fractionation and alternative wet methods, significantly reduce environmental impact by omitting or altering energy-intensive steps.
• Milder refining processes enhance the functional properties of food ingredients, shifting focus from purity to desired functionality.

Conclusions:

• Fractionation and formulation strategies should prioritize desired functionality over absolute purity to leverage benefits of milder processing.
• Milder refining significantly reduces environmental impact, aligning with the growing trend towards sustainable food production.
• Challenges such as antinutritional factors and off-flavors in mildly processed ingredients require further research and mitigation strategies.