Maple Sap Vacuum Evaporation for High-Brix Shelf-Stable Concentrate
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Solution Overview
Problem
Existing methods for concentrating maple sap result in denaturation or alteration of nutritional properties, microbial contamination, and limited shelf life due to the addition of preservatives, making it difficult to produce a high Brix maple sap concentrate suitable for various applications.
Innovation Solution
A process involving reverse osmosis, ultrafiltration, vacuum evaporation, and controlled heating to produce a concentrated maple sap product with a Brix range of 60 to 70 without significant nutritional alteration, using a system comprising a tank, ultrafiltration unit, reverse osmosis concentrator, and vacuum evaporator, with optional thermal treatment to achieve pasteurization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If reverse osmosis is used to concentrate maple sap, then concentration efficiency is improved, but microbial load increases
Solution Approach 1:
The concentration process is divided into two distinct stages: reverse osmosis for initial concentration (improving productivity) followed by vacuum evaporation for final concentration and microbial reduction (eliminating harmful factors). This segmentation allows each process to optimize its function without compromising the other.
Solution Approach 2:
The vacuum evaporation step converts the harmful effect of concentrated microorganisms into a benefit by using the vacuum environment to evaporate water at low temperatures, which simultaneously concentrates the sap and reduces microbial load through the vacuum conditions and controlled heating.
2Object-generated harmful factors
If ultrafiltration or microfiltration is used to remove microorganisms, then microbial load is reduced, but shelf life extension is limited
Solution Approach 1:
The invention changes the physical parameters of the environment by using vacuum conditions during evaporation, which lowers the boiling point of water and allows concentration at temperatures below 100°C. This parameter change enables both microbial reduction and preservation of nutritional properties simultaneously.
Solution Approach 2:
The process combines multiple treatment methods (ultrafiltration/microfiltration followed by vacuum evaporation) into a composite treatment system, where each method contributes different functions: filtration removes larger particles and some microbes, while vacuum evaporation provides final concentration and additional microbial reduction, achieving synergistic effects.
3Productivity
If traditional boiling evaporation is used to concentrate maple sap, then concentration is achieved, but nutritional properties are denatured
Solution Approach 1:
The invention changes the pressure parameter by using vacuum conditions, which lowers the boiling point of water from 100°C to below 100°C. This allows evaporation and concentration to occur at lower temperatures, preventing thermal denaturation of nutritional components while maintaining effective concentration capability.
Solution Approach 2:
The process utilizes phase transition of water from liquid to vapor under vacuum conditions. By controlling the phase transition temperature through vacuum pressure, the system achieves concentration without exposing the sap to high temperatures that would denature nutritional properties.
4Duration of action of stationary object
If preservative chemicals are added to extend shelf life, then storage duration is improved, but product naturalness is compromised
Solution Approach 1:
The invention replaces chemical preservation methods with a physical treatment system consisting of vacuum evaporation and controlled heating. This mechanical/physical approach extends shelf life through microbial reduction and concentration without introducing chemical preservatives, maintaining the natural status of the product.
Solution Approach 2:
The vacuum evaporation process inherently provides both concentration and preservation functions. The low-temperature evaporation and controlled heating automatically reduce microbial load and stabilize the product, making the system self-sufficient for both concentration and shelf life extension without external chemical additives.
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
The process maintains the nutritional quality of maple sap, reduces microbial load, and extends shelf life, producing a concentrated nectar product suitable for use as a natural sweetening agent with enhanced nutritional properties and low energy consumption.
Implementation Method 1
concentrating the maple sap or sweet vegetal water solution or the filtered solution by means of a reverse osmosis concentrator (C) to produce a high Brix solution
Implementation Method 2
evaporating the high Brix solution by means of a vacuum evaporator (D) at temperature T3 to produce the concentrated product
Implementation Method 3
filtering the maple sap or sweet vegetal water solution by means of an ultrafiltration unit (B) to produce a filtered solution
Data Source
AI summary
A process for concentrating a maple sap or sweet vegetal water solution is provided. The process comprises collecting the solution in a tank at temperature T1, wherein T1 is between 4° C. and 10° C.; concentrating the solution by means of a reverse osmosis concentrator to produce a high Brix solution of about 15 to about 40 Brix; heating the high Brix solution of about 15 to about 40 Brix to temperature T2, wherein T2 is between 40° C. and 85° C.; and evaporating the high Brix solution by means of a vacuum evaporator at temperature T3 to produce the concentrated product of about 60 to about 70 Brix, wherein T3 is between 55° C. and 80° C. A system for concentrating a maple sap or sweet vegetal water solution is provided, as well as a concentrated product produced by the process of the present invention.