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Research Article

Survival of Beijerinckia sp. microencapsulated in carbohydrates by spray-drying

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Pages 15-24 | Received 25 Jan 2003, Accepted 20 Jun 2003, Published online: 03 Oct 2008
 

Abstract

The encapsulation of Beijerinckia sp. cell suspension in different wall materials using the spray drying technique was performed. Mat dextrin, dehydrated glucose syrups, gum acacia and modified starch materials were tested. Cell viability assays were carried out before and after drying and during storage of the products. The surface area and characteristics of the encapsulated powders were examined using BET adsorption of N2 and scanning electron microscopy, respectively. The residual moisture content and water activity of the powders were also determined. The best results were obtained with the dehydrated glucose syrup, which resulted in products with the greatest per cent survival during the drying process and subsequent storage period. The products obtained with the dehydrated glucose syrup showed more uniform microcapsule surfaces at lower Aw values and residual moisture content.

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