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Segregation in food powders.

G Barbosa-Canovas¹, J Malave-Lopez, M Peleg

¹Department of Food Engineering University of Massachusetts Amherst, MA.

Biotechnology Progress

|June 23, 2010

Summary

Food powder mixtures can segregate due to vibration or flow, affecting both free-flowing and cohesive powders. Segregation intensity depends on powder properties and mixture order.

Area of Science:

Food science and technology
Materials science
Chemical engineering

Background:

Powder mixtures are common in food processing.
Segregation can negatively impact product quality and uniformity.
Understanding segregation is crucial for process control.

Purpose of the Study:

To investigate the segregation tendency in food powder mixtures.
To determine factors influencing powder segregation.
To demonstrate that segregation occurs in both free-flowing and cohesive powders.

Main Methods:

Monitoring segregation tendency using simple vibration tests.
Monitoring segregation tendency using flow tests.
Analyzing the influence of powder composition, size, and mechanical history.

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Assessing the impact of mixture "order" on segregation.

Main Results:

Segregation tendency in food powder mixtures can be effectively monitored by vibration or flow tests.
Segregation was observed in both free-flowing and cohesive powder types.
The intensity of segregation is influenced by powder composition, particle size, and mechanical history.
The degree of mixture order significantly affects the segregation phenomenon.

Conclusions:

Simple vibration and flow tests are viable methods for monitoring powder segregation.
Segregation is a relevant phenomenon for both free-flowing and cohesive food powders.
Controlling powder properties and mixture order is key to mitigating segregation in food products.