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Library Catalogue

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    Union Catalogue of Agricultural Libraries in the Netherlands

    The WUR Library Catalogue contains bibliographic data on books and periodicals held by the libraries of Wageningen University and Research Centre and some 15 associated libraries. Holding data are added to each record.

    Subjects covered include Agrotechnology, Food and Food Production, Plant and Animal Sciences, Soil Science, Geo-information, Landscape and Spatial Planning, Water and Climate, Ecosystem Studies, Economics and Society.

    The joint collections of the participating libraries cover a substantial part of the internationally available scientific literature in these disciplines.

    As far as Dutch scientific literature in these fields is concerned, coverage can be considered near 100%, including much of the so-called "grey literature".

    All titles are entered in their original language. Keywords are added to facilitate subject searching.

    The database is updated every day and now contains over 830.000 records.

Record number 104702
Title Vacuolenvorming bij het verstuivingsdrogen
show extra info.
J.G.P. Verhey
Author(s) Verhey, J.G.P.
Publisher Wageningen : Pudoc
Publication year 1973
Description [106] p
Notes Proefschrift Wageningen
ISBN 9022004503
Tutors Vos, Prof. Ir. E.A.
Graduation date 1973-05-11
Dissertation no. 548
Author abstract show abstract

Experiments with a pilot spray drier showed that vacuoles in spray-powder particles originate from air bubbles. These are dispersed in the liquid during spraying, before actual atomization. During drying, the air bubbles expand as a result of gradual solidification of the droplet surface ('case hardening') before drying is complete. The vacuole volume is governed by the degree of air incorporation (related to type and design of atomizer and properties of the feed liquid) and the bubble expansion (related, for instance, to inlet air temperature).

Vacuoles do not develop as a result of spontaneous boiling phenomena. Vacuole-free powders can be produced by replacing the air in the atomizer by steam.

Online full textINTERNET
On paper FORUM ; STACKS ; NN08200,548
FORUM ; STACKS ; NN08202,548
Keyword(s) (cab) dried milk / spray drying / fluid mechanics / gases / liquids / fluids / mixtures / flow
Categories Thermodynamics
Publication type PhD thesis
Language English ; Dutch; Flemish
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