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Related Experiment Video

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Process Development for the Spray-Drying of Probiotic Bacteria and Evaluation of the Product Quality

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Published on: April 7, 2023

Production of shelf-stable ranch dressing using high-pressure processing.

J G Waite¹, J M Jones, E J Turek

¹Dept of Food Science and Technology, Parker Food Science Building, The Ohio State Univ, Columbus, OH 43210, USA.

Journal of Food Science

|March 28, 2009

Summary

High-pressure processing (HPP) effectively preserved ranch dressing against microbial spoilage for 26 weeks without negatively impacting quality. This food preservation method offers a viable alternative to thermal treatments for premium products.

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Area of Science:

Food Science
Microbiology
Food Preservation Technologies

Background:

High-pressure processing (HPP) offers a non-thermal food preservation method.
HPP can maintain food quality better than thermal processing.
HPP is suitable for foods sensitive to heat or those benefiting from pH adjustment.

Purpose of the Study:

To evaluate the efficacy of HPP in preventing microbial spoilage in premium ranch dressing.
To assess the impact of HPP on the physical, chemical, and sensory attributes of ranch dressing during shelf life.
To determine the optimal HPP conditions for ranch dressing preservation.

Main Methods:

Inoculated-package studies were conducted using key ranch dressing spoilage organisms.
HPP treatments were applied at 600 MPa for 3 or 5 minutes.
Shelf-life studies involved storing HPP-treated ranch dressing at 4°C and 26°C for up to 26 weeks.

Main Results:

HPP treatment (600 MPa, 5 min) significantly reduced spoilage organisms like Pediococcus acidilactici by over 6.4 log CFU/g.
Microbial spoilage was prevented throughout the 26-week storage period for HPP-treated ranch dressing.
HPP did not adversely affect the pH or emulsion stability of the ranch dressing.

Conclusions:

HPP is an effective technology for preserving premium ranch dressing, extending shelf life without compromising quality.
Extended storage of HPP ranch dressing at 26°C led to decreased consumer acceptance and changes in color and organic acid profile.
HPP allows for the production of premium ranch dressing with a defined shelf life and storage conditions.