Coffee bean processing: Emerging methods and their effects on chemical, biological and sensory properties

Area of Science:

• Food Science
• Agricultural Science
• Biotechnology

Background:

• Coffee quality is significantly influenced by processing methods, particularly fermentation.
• Emerging techniques aim to enhance sensory attributes and modify chemical composition.
• Understanding the impact on bioactive compounds is crucial for product development.

Purpose of the Study:

• To summarize the effects of emerging coffee processing methods on chemical, biological, and sensory properties.
• To evaluate the optimization of fermentation pathways, including volatile and organic acid formation.
• To assess the reduction of bioactive compounds during these novel processing stages.

Main Methods:

• Review and synthesis of studies on emerging coffee bean and cherry fermentation processes.
• Analysis of chemical changes, focusing on volatiles, flavor precursors, and organic acids.
• Evaluation of alterations in bioactive compound concentrations (e.g., caffeine, phenolics).

Main Results:

• Emerging processes variably impact coffee bean properties based on raw material and methodology.
• These novel methods effectively reduce concentrations of bioactive compounds like caffeine and phenolics.
• Optimization of fermentation pathways leads to changes in flavor precursors and organic acids.

Conclusions:

• Emerging coffee processing methods offer potential for improved sensory quality and reduced bioactives.
• Further research and process simplification are essential for enhancing biological activities and ensuring producer accessibility.
• Optimizing post-fermentation steps is critical for defect-free coffee production and wider adoption.