Coffee Cherry Processing: Wet Grinding and Extraction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current coffee processing methods face challenges in achieving consistent extraction and yield of aromatic and nutritional components from coffee cherries due to inconsistencies in fermentation and roasting processes, leading to spoilage and degradation of sensitive ingredients, and inefficient use of coffee cherry components.
Innovation Solution
A coffee cherry processing method involving the formation of a suspension with water, followed by multiple steps of wet grinding to a particle size of 100 μm or less, and separation of the water phase to obtain coffee cherry extracts such as aroma, oil, powder, and juice, allowing for optimized extraction and removal of undesirable components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If fermentation is used to remove mucilage from coffee cherries, then the separation of mucilage is improved, but the process becomes difficult to control leading to under-fermentation or over-fermentation
Solution Approach 1:
The invention extracts and removes the mucilage layer from coffee beans through a controlled process that separates this specific component without requiring extended fermentation. The mucilage is removed early in the processing sequence, eliminating the need for difficult-to-control fermentation steps while achieving complete mucilage removal.
Solution Approach 2:
The invention performs preliminary removal of the mucilage layer before the beans undergo roasting or further processing. By removing mucilage early through mechanical or chemical means rather than relying on fermentation, the process establishes better control over subsequent steps and prevents the variability associated with fermentation timing.
2Ease of manufacture
If roasting is prolonged to develop aromatic profile, then aroma formation is improved, but nutritionally beneficial components and desirable taste are degraded
Solution Approach 1:
The invention extracts aromatic compounds and desirable components from the coffee beans through solvent extraction or supercritical fluid extraction before roasting. This allows the aromatic profile to be developed and captured separately, enabling subsequent roasting to focus on flavor development without the prolonged exposure that degrades polyphenols and antioxidants.
Solution Approach 2:
The invention performs preliminary extraction of aromatic constituents and beneficial components before the roasting process. By capturing these sensitive compounds in advance through gentle extraction methods, the subsequent roasting can be optimized for flavor development without compromising the previously extracted nutritional and aromatic components.
3Productivity
If wet grinding is performed to fine particle size, then extraction efficiency is improved, but the process complexity increases
Solution Approach 1:
The invention replaces extended mechanical wet grinding with a combination of coarser grinding followed by high-pressure extraction or sonication. This substitution uses physical-chemical or acoustic energy to achieve thorough component extraction without requiring prolonged mechanical grinding, thereby reducing device complexity and processing time while maintaining high extraction efficiency.
Solution Approach 2:
The invention changes the parameters of the extraction process by using high pressure, elevated temperature, or ultrasonic frequencies to enhance extraction efficiency. These parameter changes allow for effective extraction with coarser particle sizes, eliminating the need for complex multi-stage fine grinding processes while maintaining or improving productivity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method enhances the extraction and yield of desirable coffee fruit components, enabling the production of a variety of usable extracts and products while preserving nutritional benefits and improving the digestibility and flavor profile of coffee products.
Implementation Method 1
adding water to coffee cherries or to any of pulp or green, unroasted coffee beans obtained from the coffee cherries to form a suspension
Implementation Method 2
wet grinding said suspension in multiple steps to an average particle size of 100 μm or less
Implementation Method 3
subjecting said suspension to one or more separation and/or processing steps comprising at least the separation of the water phase to obtain at least one coffee cherry extract
Data Source
AI summary
Described are methods and/or techniques for the production of coffee fruit extracts on the basis of coffee cherries, which enable improved extraction and yield of usable aromatic constituents and nutritionally beneficial components (incl. polyphenols, antioxidants, and/or sugars) of the coffee fruit. Specifically, the invention relates to a coffee cherry processing method, having the steps of: (1) adding water to coffee cherries or to any of pulp or green, unroasted coffee beans obtained from the coffee cherries to form a suspension; (2) wet grinding said suspension in multiple steps to an average particle size of 100μηη or less; and (3) subjecting said suspension to one or more separation and/or processing steps having at least the separation of the water phase to obtain at least one coffee cherry extract selected from coffee cherry aroma, coffee cherry oil, coffee cherry powder, coffee cherry juice, coffee pulp aroma, coffee pulp powder, coffee pulp juice, coffee aroma and green or roasted coffee powder.