Stable Fermented Milk Products Using Pectin Stabilization
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Solution Overview
Problem
Current methods for producing stable acidified milk drinks (AMDs) face challenges when using high methyl ester pectin as a stabilizing additive, as it tends to cause phase separation and instability when added to neutral milk before fermentation, leading to undesirable texture and viscosity issues.
Innovation Solution
Introducing pectin as a stabilizing additive before the heat treatment and fermentation process, potentially combined with low acyl gellan gum, to create a stable mixture that prevents protein aggregation and phase separation, thereby stabilizing the final fermented milk product.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high methyl ester pectin is added to neutral milk before fermentation, then the product can be stabilized against protein aggregation, but phase separation and instability occur leading to undesirable texture and viscosity
Solution Approach 1:
The patent applies preliminary action by adding pectin to the milk before heat treatment and fermentation, allowing the stabilizer to be incorporated into the protein matrix during these processes. This timing ensures the pectin is properly integrated before fermentation begins, preventing phase separation while maintaining product stability throughout shelf life.
Solution Approach 2:
The patent utilizes parameter changes by controlling the degree of methyl esterification of the pectin and adjusting processing conditions such as heat treatment temperature and pH levels. These parameter optimizations enable the pectin to effectively stabilize the product without causing the phase separation issues that occur with conventional high methyl ester pectin.
2Stability of the object's composition
If pectin is added before heat treatment and fermentation, then phase separation is prevented and homogeneity is improved, but the process complexity increases
Solution Approach 1:
The patent merges the pectin addition step with the existing heat treatment and fermentation processes, eliminating the need for separate stabilization steps. By integrating these functions into a unified process flow, the patent achieves homogeneous mixing and phase stability without significantly increasing overall process complexity.
3Reliability
If pectin is used as stabilizer, then protein aggregation is prevented, but excessive viscosity may occur
Solution Approach 1:
The patent controls viscosity by optimizing the concentration of pectin and adjusting the degree of methyl esterification. By carefully tuning these parameters, the patent achieves effective protein stabilization while maintaining viscosity within acceptable ranges for the final product.
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 results in a more stable AMD with improved viscosity and reduced risk of phase separation, enhancing the product's shelf life and consumer appeal by maintaining a homogeneous texture.
Implementation Method 1
Pectin is one stabilizing additive that has been used to prevent the aggregation of suspended proteins in AMDs, thereby preventing the suspension from segregating into larger individual phases. It is believed that the pectin adsorbs to the sticky surfaces of the protein bodies, and the new surface (of adsorbed pectin molecules) is, in contrast to the old one, non-sticky.
Implementation Method 2
The mixture is heat treated. In some instances, yogurt is reasonably stable during its normal shelf life. The signs of instability that may be observed, such as, for example, a small or moderate amount of whey exudation, are traditional and generally accepted by consumers.
Implementation Method 3
Fermented milk drinks can, in certain instances, be prepared from natural milk by fermentation with a bacterial culture so that the product attains an acidic pH, such as, for example, less than 4.4.
Data Source
AI summary
Methods are provided for making a fermented milk product in which a stabilizing additive is introduced before fermentation. The methods generally include (1) combining milk and pectin to form a mixture, (2) heat treating the mixture, and (3) fermenting the mixture. In some embodiments, the methods further include combining the milk and pectin with a low acyl gellan gum. The methods also may include homogenizing the mixture before heat treating the mixture and/or after fermenting the mixture. Also provided in embodiments herein are fermented milk products.