What is the mild heat treatment of liquid foods, typically heated below 100°C, designed to inhibit a phase change and whose parameters depend on the acidity of the product?

What is the mild heat treatment of liquid foods, typically heated below 100°C, designed to inhibit a phase change and whose parameters depend on the acidity of the product?

• A. Pasteurization
• B. Sterilization
• C. Blanching
• D. Fermentation

Answer: (A)

Pasteurization is a mild heat treatment for liquids done below 100°C to reduce pathogens and spoilage organisms while preserving quality. The exact time–temperature combination is chosen based on how acidic the product is because the heat resistance of microbes changes with pH. More acidic liquids often need shorter times or lower temperatures to achieve the same safety level, while less acidic ones may require longer or hotter treatment. This approach aims to prevent undesirable changes in the product that could come from microbial growth or enzyme activity, rather than completely sterilizing it. The other options don’t fit: sterilization uses temperatures above 100°C to destroy spores; blanching is a quick enzyme-inactivation step for vegetables; fermentation is a biological process, not a heat treatment.

Pasteurization is a mild heat treatment for liquids done below 100°C to reduce pathogens and spoilage organisms while preserving quality. The exact time–temperature combination is chosen based on how acidic the product is because the heat resistance of microbes changes with pH. More acidic liquids often need shorter times or lower temperatures to achieve the same safety level, while less acidic ones may require longer or hotter treatment. This approach aims to prevent undesirable changes in the product that could come from microbial growth or enzyme activity, rather than completely sterilizing it. The other options don’t fit: sterilization uses temperatures above 100°C to destroy spores; blanching is a quick enzyme-inactivation step for vegetables; fermentation is a biological process, not a heat treatment.