Continuous Vegetable Treatment for Firmness Retention
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Solution Overview
Problem
Scaling up vegetable treatment processes to industrial production while maintaining product quality and firmness is challenging, as thermal treatments can adversely affect texture and organoleptic properties.
Innovation Solution
A continuous method involving a vegetable product treatment device with a temperature-controlled chamber maintaining vegetables at 125° F to 160° F and liquid at pH 5 to 7, followed by a high-temperature blanching step, to enhance firmness and retain quality through processes like freezing and canning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thermal treatments are used to destroy microorganisms, then food safety is improved, but texture and organoleptic properties of vegetables deteriorate
Solution Approach 1:
The patent applies preliminary low-temperature treatment (125-160°F for 20-60 minutes) before final thermal processing to activate pectin methyl esterase and calcium treatment, which pre-strengthens the vegetable cell walls and pectin structures, thereby improving texture retention during subsequent high-temperature canning while maintaining food safety
2Strength
If batch production methods are used to improve firmness, then product quality is improved, but productivity and throughput are reduced
Solution Approach 1:
The patent implements a continuous processing system where vegetables move through the treatment chamber continuously rather than in batches, maintaining the beneficial low-temperature treatment conditions while achieving industrial-scale throughput and productivity comparable to conventional continuous canning operations
3Strength
If low temperature treatment is applied to improve firmness, then texture is improved, but processing time is extended
Solution Approach 1:
The patent optimizes the low-temperature treatment parameters by conducting the process at 125-160°F for 20-60 minutes, which is a controlled time-temperature regime that achieves maximum firmness improvement while minimizing total processing time, and this preliminary treatment actually reduces overall processing time by preventing texture degradation during subsequent storage and distribution
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 method effectively improves vegetable firmness and retains superior organoleptic properties, enabling high-volume production of vegetables that maintain texture and quality during further processing, such as freezing and retorting.
Implementation Method 1
The liquid is maintained in the vegetable product treatment chamber at a pH of from about 5 to about 7
Implementation Method 2
maintaining the temperature of the vegetable product in the vegetable product treatment chamber at a temperature of from about 125° F. to about 160° F.
Implementation Method 3
In a subsequent blanching step, the heat-treated vegetable products are treated at a temperature ranging from about 190° F. to about 210° F. for a time of from about two to about 10 minutes
Data Source
AI summary
A continuous method for improving the firmness of vegetable products uses a continuous vegetable product treatment device comprising a vegetable product treatment chamber having a vegetable product inlet, a vegetable product outlet, a vegetable product transport mechanism for urging the vegetable product toward the vegetable product outlet, and at least one liquid introduction orifice for introducing a liquid. Vegetable product is continuously treated in the chamber at a temperature of from about 125° F. to about 160° F., and the liquid in the treatment chamber is maintained at a pH of from about 5 to about 7. Individual vegetable products reside in the treatment chamber for a time of from about 20 minutes to about 60 minutes. The heat-treated vegetable products are blanched in a subsequent blanching step at a temperature ranging from about 190° F. to 210° F. for a time of from about two to about 10 minutes.