Non thermal plasma as an alternative tool for milk processing

In this study, a novel cold plasma system has been tested and optimized as an alternative processing method for decontamination of E. coli. Salmonella Typhirimium and Staphylococcus aureus in milk samples. Further to assessing the system for optimal decontamination parameters, changes to the chemical composition and sensory qualities of milk were also tested by well established methods such as GC–MS, SDS-PAGE and colorimetric testing. The inactivation of test microorganisms reached the highest level after 3 minutes of application which was followed by a slower rate of inactivation. Plasma application did not significantly affect the pH, colour, proteins, fatty acid composition, and volatile compounds of milk samples. The findings of this work have preliminarily established the feasibility of using plasma technology for milk decontamination while retaining the nutritional and sensory quality. If established this technology will provide both health and economical impacts