Improved Granulation of Instant Soups

  • Author: Cordula Buse
  • Published Date: 08 May 2020
  • Source / Publisher: Chemical Engineering & Technology/Wiley-VCH
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
thumbnail image: Improved Granulation of Instant Soups

Instant foods, such as soups, have a long shelf life and are easy to handle—they generally require only the addition of hot or cold water to reconstitute them. A common way to produce instant soups is by dehydrating fresh products such as vegetables. After drying and pulverizing, the powders need to be granulated to improve the handling of the final product. For granulation, liquid binders are needed. Water is the most commonly used liquid binder, but oil could enhance the granulation properties.


Andrea Claudio Santomaso, University of Padova, Italy, and colleagues have tested alternative liquid binders for the granulation of different vegetable powders (e.g., spinach, beetroot, and carrot). Instead of water, they tested the sequential addition of oil and water, as well as an oil-in-water emulsion. As expected, the raw, ungranulated powders did not disperse very well during rehydration with hot water and formed unwanted lumps. The more starch they contained, the more lumps were formed. Especially at higher temperatures, the starch swells and creates a gelatinous layer around the dry particles, thereby preventing dispersion.


For the granulated powders, rehydration tests showed better dispersion and fewer lumps for the granules made with an oil-in-water emulsion than for those prepared by the sequential addition of oil and water. The granules prepared with the emulsion were smaller and disintegrated more readily due to the homogeneous distribution of the oil. This, in turn, is advantageous during rehydration and dispersion. The smaller numbers of lumps improved the overall texture quality of the vegetable soup after rehydration. Overall, the work shows that using an oil‐in‐water emulsion for granulation can positively affect the properties of dried food powders.


 

 

Article Views: 626

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

Bookmark and Share

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission. more


CONNECT:

ChemistryViews.org on Facebook

ChemistryViews.org on Twitter ChemistryViews.org on YouTube ChemistryViews.org on LinkedIn Sign up for our free newsletter


Magazine of Chemistry Europe (16 European Chemical Societies)published by Wiley-VCH