Electrostatic Spray Drying Milk Powder Surface Fat Reduction
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Solution Overview
Problem
Conventional spray drying systems for milk products require high inlet and outlet temperatures, leading to degradation of milk powder, making it challenging to produce a shelf-stable, easily reconstitutable, and visually appealing powdered milk with reduced coloring and fat content.
Innovation Solution
Electrostatic spray drying is employed at an inlet temperature below 150°C, resulting in a powdered milk product with a surface composition comprising at least 8% less fat and improved agglomeration properties, maintaining a desirable appearance and retaining bioactive components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional spray drying is used with high inlet and outlet temperatures, then the drying efficiency is improved, but the milk powder product degrades and loses desirable appearance and taste
Solution Approach 1:
The invention changes the temperature parameters from conventional high temperatures (inlet >150°C, outlet >90°C) to low temperatures (inlet <150°C, outlet <90°C). This parameter change allows the drying process to proceed efficiently while preventing thermal degradation of milk powder, preserving its desirable appearance, taste, and bioactive components
Solution Approach 2:
The invention replaces the conventional thermal-driven spray drying system with an electrostatic spray drying system. By applying electrostatic charge to the spray droplets and using an electrostatic field for drying, the system substitutes thermal energy with electrical field energy, enabling low-temperature drying that prevents product degradation while maintaining high drying efficiency
2Productivity
If conventional spray drying is used, then the powdered milk product is produced efficiently, but the surface fat content is high and appearance is compromised
Solution Approach 1:
The invention changes the surface composition parameters by controlling the drying temperature and electrostatic field conditions. The low temperature drying combined with electrostatic charge prevents fat migration to the surface, resulting in powder with at least 8% less surface fat compared to conventional methods, while maintaining production efficiency
Solution Approach 2:
By replacing the thermal system with an electrostatic system, the invention gains precise control over surface composition. The electrostatic field influences the distribution of fat and other components during drying, enabling manufacturing of powder with controlled, reduced surface fat content while preserving production efficiency
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 produces a powdered milk product with reduced surface fat, enhanced agglomeration, and preserved bioactive content, ensuring improved shelf stability and reconstitution properties while maintaining a natural appearance.
Implementation Method 1
electrostatic spray drying
Implementation Method 2
drying of milk products typically is achieved using a spray drying system
Data Source
AI summary
Provided is an electrostatic spray dried powdered milk product with a surface composition comprising at least 8% less fat compared to a spray dried powder of the same milk product. Further provided is a method of providing a powdered milk product comprising electrostatic spray drying a milk product at an inlet temperature of below 150° C. The electrostatic spray dried milk product powder has a surface composition with a reduced fat content and increased carbohydrate content relative to the same milk product powder prepared by high heat spray drying.