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Concentrated High Intensity Electric Field (CHIEF) Pasteurization of Milk

Investigators
Ruan, Roger; Diez-Gonzalez, Francisco; Metzger, Lloyd
Institutions
University of Minnesota
Start date
2009
End date
2010
Objective
1. Optimize the current process and CHIEF pilot system and improve efficiency 2. Study and confirm the effect of treatments on vegetative cells and spores of pathogenic bacteria and yeasts in milk. 3. Generate experimental data that target FDA approval.
More information
This project was a continuation of the DMI-funded study on Non-thermal plasma technology of milk using plasma technology, which demonstrated that non-thermal concentrated high intensity electric field (CHIEF) process kills E.coli in fresh milk. The current study provides better understanding of CHIEF process with respect to its effects on a broad range of pathogenic and spoilage microorganisms, sensory quality, and shelf life stability. Results show that the CHIEF process has the potential to deliver similar microbial inactivation effectiveness as a standard HTST pasteurization system.
Funding Source
Nat'l. Dairy Council