Method for reducing microbe content in foodstuffs by pH and physical manipulation
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United States of America Patent
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Feb 17, 2004
Grant Date -
Jan 3, 2002
app pub date -
Jun 6, 2001
filing date -
Sep 1, 1998
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Abstract
A manipulating apparatus (10) receives a plurality of previously frozen pieces of pH modified foodstuffs or workpieces (23) and physically manipulates or stresses the workpieces while they remain in a frozen state. The physical manipulation causes relative movement between various points within the volume of the workpieces (23) and kills microbes within the foodstuff. One preferred pH modifying arrangement includes a supply of NH.sub.3 gas (11) and a pump (9) for placing the comminuted foodstuffs to be processed and the NH.sub.3 gas together under an operating pressure for a period of time sufficient to increase the pH of the foodstuffs.
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