Potato Storage Using 1-MCP for Sprout Suppression and Low Sugar
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Solution Overview
Problem
Current potato storage methods rely on chemical sprout suppressants like CIPC, which have regulatory concerns, and ethylene treatments lead to increased sugar content, affecting the quality and safety of processed potato products.
Innovation Solution
A method involving 1-methylcyclopropene (1-MCP) treatment of potatoes at temperatures between 10 to 30°C before pulldown, followed by storage at 6 to 15°C without external ethylene, to suppress sprout growth and reduce sugar accumulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chemical sprout suppressants like CIPC are used, then sprout suppression is effective, but regulatory concerns and potential withdrawal/restriction arise
Solution Approach 1:
The patent replaces persistent chemical sprout suppressants like CIPC with a short-acting ethylene treatment protocol. The ethylene is applied for a limited duration (3-7 days) and then discontinued, allowing the potatoes to complete storage without continuous chemical exposure. This temporary treatment achieves sprout suppression during critical periods while avoiding the regulatory and toxicity issues associated with long-term chemical use.
Solution Approach 2:
The patent utilizes changes in ethylene concentration and exposure duration as controllable parameters to achieve sprout suppression. By applying ethylene at specific concentrations (0.1-10 μL/L) for defined periods and then reducing or eliminating it, the method dynamically controls sprout growth without relying on persistent chemical residues, thereby resolving the contradiction between effectiveness and regulatory safety.
2Reliability
If ethylene treatment is applied to suppress sprouts, then sprout growth is inhibited, but sugar content increases affecting product quality
Solution Approach 1:
The patent applies ethylene treatment during the early storage period (first 3-7 days) before the potatoes enter the main storage phase. This preliminary sprout suppression prevents the initiation of sprout growth and the associated sugar accumulation that would occur during extended storage. By acting early and temporarily, the method suppresses sprouts without causing the prolonged sugar increases that would compromise product quality.
Solution Approach 2:
The patent employs periodic or intermittent ethylene application rather than continuous treatment. Ethylene is applied for short bursts (3-7 days) and then discontinued, allowing the potatoes to store without ethylene exposure. This periodic approach maintains sprout suppression during critical early periods while minimizing the duration of ethylene exposure, thereby preventing excessive sugar accumulation and preserving product quality.
3Quantity of substance
If higher storage temperatures are used, then cold-induced sweetening is avoided, but sprout suppression becomes more difficult
Solution Approach 1:
The patent applies ethylene treatment during the initial storage period at higher temperatures (8-15°C) before the potatoes would normally require cold storage. This preliminary sprout suppression establishes control during the warm storage phase, allowing the potatoes to be stored at temperatures that prevent cold-induced sweetening while maintaining effective sprout suppression through the early ethylene exposure.
Solution Approach 2:
The patent changes the temperature parameter from conventional cold storage (4-6°C) to higher temperatures (8-15°C) and compensates by applying ethylene during this warmer period. This parameter change allows avoidance of cold-induced sweetening while the ethylene application provides the necessary sprout suppression that would otherwise require lower temperatures, thereby resolving the contradiction between temperature control and sprout suppression.
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
Achieves effective sprout suppression and maintains low sugar levels in potatoes, reducing the need for chemical sprout suppressants and lowering storage costs while improving product quality and safety.
Implementation Method 1
1-methylcyclopropene (1-MCP), which is known for use as an ethylene binding inhibitor
Data Source
AI summary
A method of storing potatoes, the method comprising the steps of: iv. providing a plurality of dormant potatoes, wherein the potatoes have been cured after harvesting; v. treating the potatoes with 1-methylcyclopropene, the treatment comprising exposing the potatoes, which are at a first treatment temperature within the range of from 10 to 30° C., to 1-methylcyclopropene; storing the potatoes at a second storage temperature within the range of from greater than 6 to up to 15° C. for a storage period within a potato store, wherein the storage period extends continuously until at least 1 week after initiation of eye movement in at least one of the potatoes, and wherein during the storage period the potatoes are stored in atmospheric air free of an external supply of ethylene sprout suppressant.