High-Pressure Beverage Extraction for Cold Brew Shelf-Life
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Solution Overview
Problem
Current methods for producing ready-to-drink beverages through solid-liquid extraction are time-consuming, especially at cold temperatures, and often result in low extraction rates and yields, with heat-based methods risking damage to flavor and nutritional compounds, while existing high pressure processing (HPP) methods either increase extraction rates or ensure safety but not simultaneously.
Innovation Solution
The method employs in-bulk High Pressure Processing (HPP) to simultaneously extract compounds of interest from plant-based materials or microorganisms and inactivate microorganisms, using a flexible bag within a high-pressure vessel to apply pressures between 200 to 800 MPa for defined times, followed by filtration to produce a safe, enriched beverage with extended shelf-life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cold or room temperature extraction is used, then flavor and nutritional compounds are preserved, but extraction time becomes very long (several hours)
Solution Approach 1:
The invention changes the pressure parameter from atmospheric to high pressure (100-1000 MPa) while maintaining cold or room temperature conditions. This parameter change enables rapid extraction (seconds to minutes) without compromising the preservation of flavor and nutritional compounds that would otherwise require long extraction times at low temperature.
Solution Approach 2:
The invention replaces the traditional thermal or prolonged mechanical extraction system with a high-pressure mechanical system. By applying intense pressure to permeabilize cell membranes and force compound diffusion, the process achieves rapid extraction without the need for extended time or thermal energy input.
2Productivity
If heat is used to increase extraction rate, then extraction yield improves, but flavor and nutritional compounds are damaged or destroyed
Solution Approach 1:
The invention replaces thermal energy input with high-pressure mechanical energy input. By using pressure in the range of 100-1000 MPa to drive extraction, the process achieves high extraction rates without the harmful thermal effects that would damage sensitive flavor and nutritional compounds.
Solution Approach 2:
The invention uses hydraulic pressure (liquid medium under high pressure) to perform the extraction function traditionally achieved by heat. The high-pressure liquid phase forces compounds from solid to liquid phase through pressure-driven diffusion and cell membrane permeabilization, avoiding thermal damage entirely.
3Productivity
If high pressure processing is applied, then extraction time is reduced and yield is increased, but microorganisms are not inactivated affecting safety and shelf-life
Solution Approach 1:
The invention merges two previously separate functions into a single high-pressure processing step: (1) extraction of compounds from solid to liquid phase, and (2) inactivation of microorganisms. By applying sufficient pressure (typically 400-1000 MPa), the process simultaneously achieves rapid extraction and pasteurization, eliminating the need for separate extraction and sterilization steps.
Solution Approach 2:
The high-pressure processing system performs multiple functions simultaneously: it acts as both an extraction medium (forcing compound diffusion) and a sterilization agent (inactivating microorganisms through pressure-induced cell damage). This multi-functionality resolves the contradiction between extraction efficiency and microbiological safety.
4Reliability
If traditional filtration is used to remove microorganisms, then safety is improved, but extraction yield is reduced and additional processing time is required
Solution Approach 1:
The invention combines the functions of extraction, sterilization, and clarification into a single high-pressure processing step. By applying high pressure, the process simultaneously extracts compounds, inactivates microorganisms, and facilitates their removal through pressure-driven separation, eliminating the need for separate filtration steps that would reduce yield and add time.
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 approach significantly reduces extraction time, increases yield, and ensures microbiological safety and extended shelf-life of beverages by promoting compound diffusion and inactivating spoilage microorganisms, while maintaining flavor and nutritional integrity.
Implementation Method 1
The use of high pressure processing (HPP), between 100 and 1,000 MPa, can reduce the time of extraction to a few seconds/minutes
Implementation Method 2
High pressure promotes the permeabilization of the cell membranes of microorganisms, algae, and plant cells allowing their content (proteins, polysaccharides, antioxidants, vitamins, flavor molecules, etc.) to diffuse to their surrounding media
Implementation Method 3
allowing their content (proteins, polysaccharides, antioxidants, vitamins, flavor molecules, etc.) to diffuse to their surrounding media, therefore extracting it to the liquid
Implementation Method 4
HPP is a non-thermal pasteurization technology already used to process several types of beverages (among other foods) to eliminate spoilage microorganisms and pathogens and therefore, to extend the shelf-life of the final product
Data Source
Figure 1
Figure 2
Figure 3a~3b
AI summary
A method for producing beverages by extraction using High Pressure Processing (HPP), to produce in-bulk, enriched ready-to-drink beverages with an extended shelf-life. The method uses high hydrostatic pressure (HPP, High Pressure Processing) to simultaneously perform a solid-liquid extraction and/or infusion (e.g. cold-brewing) with an improved extraction rate and/or yield, and to inactivate spoilage and pathogenic microorganisms to increase safety and shelf-life. The method includes introducing a mixture (8) of solids and liquids into a bag (3) allocated in a vessel (4) that is furtherly pressurized to a predetermined pressure (up to 800 MPa), and the pressure is held (10) for a predetermined time. The method includes depressurizing the vessel (11) and evacuating the mixture from the bag (12), filtering it in ultraclean conditions (13), thus obtaining a safe beverage, free of particles and enriched in extracted compounds of interest.