High-Pressure Fruit Puree Sterilization for Infant Food Safety
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Solution Overview
Problem
Current methods for sterilizing fruit purees for infants are ineffective in eliminating heat-resistant bacterial spores like Alicyclobacillus acidoterrestris, compromising microbiological safety and sensory quality, especially when using high temperatures or traditional high-pressure processing.
Innovation Solution
A method involving a fruit-based composition with a pH between 3.0 and 4.5 and a total solids content of 10-30% by weight, subjected to pressures between 300 MPa and 500 MPa and temperatures between 65°C and 80°C for 2-30 minutes, effectively reducing bacterial spores and maintaining natural appearance and taste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high temperature thermal treatment is used to sterilize fruit purees, then microbiological safety is improved, but nutritional value and sensory quality deteriorate
Solution Approach 1:
The invention changes the sterilization parameters from high temperature to high pressure (300-500 MPa) combined with moderate temperature (65-80°C) and specific pH control (3.0-4.5). This parameter transformation achieves effective sterilization against heat-resistant spores while preserving the sensory quality and nutritional value of fruit purees, resolving the contradiction between microbiological safety and sensory quality
Solution Approach 2:
The invention replaces the thermal sterilization mechanism with a high-pressure mechanical sterilization mechanism. By applying pressures of 300-500 MPa, the process achieves sterilization效果 without relying on high temperatures that cause sensory degradation, thus resolving the contradiction between effective sterilization and quality preservation
2Object-generated harmful factors
If traditional high-pressure processing is used to sterilize food, then thermal damage is reduced, but heat-resistant bacterial spores are not effectively eliminated
Solution Approach 1:
The invention modifies the high-pressure processing parameters by combining pressures of 300-500 MPa with moderate temperatures (65-80°C) and controlling pH to 3.0-4.5. This parameter combination creates synergistic effects that effectively eliminate heat-resistant spores like Alicyclobacillus acidoterrestris while minimizing thermal damage, resolving the contradiction between preserving quality and achieving effective sterilization
Solution Approach 2:
The invention creates a composite sterilization approach by combining high pressure, moderate temperature, and pH control into an integrated treatment system. This multi-factor combination enhances sterilization effectiveness against heat-resistant spores while maintaining the sensory qualities of the fruit puree, resolving the contradiction between sterilization effectiveness and quality preservation
3Duration of action of stationary object
If extended shelf life is achieved through conventional sterilization, then storage stability is improved, but nutritional and organoleptic properties deteriorate
Solution Approach 1:
The invention changes the sterilization approach to high pressure (300-500 MPa) with moderate temperature (65-80°C) and pH control (3.0-4.5), achieving extended shelf life at ambient temperature without the nutritional degradation caused by conventional high-temperature sterilization. This resolves the contradiction between shelf life extension and nutritional value preservation
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 achieves microbiological safety for infant food standards, extends shelf life at ambient temperatures, and preserves the natural sensory qualities of fruit purees, reducing heat-resistant spores by several logs without the need for preservatives.
Implementation Method 1
subjecting the fruit-based composition to a pressure between 300 MPa and 500 MPa and a temperature between 65 °C and 80 °C, for 2 to 30 minutes
Implementation Method 2
subjecting the fruit-based composition to a pressure between 300 MPa and 500 MPa
Implementation Method 3
wherein the composition has a pH between 3.0 and 4.5
Data Source
AI summary
The present invention relates to the field of processing food. Particularly, the present invention relates to a method of preparing a fruit-containing product using high pressure pasteurization. The fruit- containing product obtained by the method of the invention is microbiologically safe and can be stored 5 at ambient temperatures. The fruit-containing product according to the invention can be used to feed babies and infants during mixed diet introduction.