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Related Experiment Videos

Drying kinetics of calcium caseinate.

Michael Kozempel1, Andrew J McAloon, Peggy M Tomasula

  • 1U.S. Department of Agriculture, Agricultural Research Service, Eastern Regional Research Center, 600 East Mermaid Lane, Wyndmoor, Pennsylvania 19038, USA. mkozempel@arserrc.gov

Journal of Agricultural and Food Chemistry
|January 23, 2003
PubMed
Summary

Starting calcium caseinate (CaCas) solutions at higher solids concentrations (10%) significantly reduces drying time and costs. This method yields films comparable to those made from lower solids solutions, optimizing the caseinate film production process.

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Area of Science:

  • Food Science
  • Materials Science
  • Chemical Engineering

Background:

  • Drying constitutes a significant portion of the production cost for caseinate-based films.
  • Understanding drying kinetics is crucial for optimizing manufacturing processes and reducing energy consumption.

Purpose of the Study:

  • To determine the drying curves for calcium caseinate/glycerol films under varying relative humidity conditions.
  • To investigate the impact of initial solids concentration on drying behavior and film quality.
  • To estimate the cost-effectiveness of using more concentrated solutions for film production.

Main Methods:

  • Experimental determination of drying curves for calcium caseinate/glycerol films at controlled temperatures (21-34°C) and relative humidity (low and high).
  • Analysis of drying periods, specifically identifying the duration of the constant rate and falling rate periods.

Related Experiment Videos

  • Comparison of film properties and drying costs when initiating drying from different solids concentrations (5% vs. 10%).

    • Main Results:

    • Drying curves characterized by an extended constant rate period followed by a single falling rate period.
    • A substantial portion of drying occurred before actual film formation, particularly in the constant rate period.
    • Utilizing a 10% solids concentration solution allowed bypassing a significant part of the constant rate period.
    • Films produced from 10% solids solutions were equivalent in quality to those from higher initial moisture content.

    Conclusions:

    • Increasing the initial solids concentration of calcium caseinate solutions can significantly reduce drying time and associated costs.
    • Starting with 10% solids is a viable strategy for producing high-quality calcium caseinate films more economically.
    • Optimizing initial solids concentration offers a cost-effective approach to caseinate film manufacturing.