CHARACTERISTICS OF FILTER-AIDS

Effective bed voidage is a reliable characteristic of filter‐aids, both kieselguhrs and perlites. When combined with the evidence of electronmicrographs, it gives excellent correlation between filtration theory and practice. Effective bed voidage is a more reliable characteristic than permeability w...

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Bibliographic Details
Published in:Journal of the Institute of Brewing 1989-05, Vol.95 (3), p.169-179
Main Authors: Picksley, Mark A., Reed, Robert J. R.
Format: Article
Language:English
Subjects:
Beers
Biological and medical sciences
Fermented food industries
filter-aids
Filtration
Food industries
Fundamental and applied biological sciences. Psychology
kieselguhrs
perlite
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Summary:Effective bed voidage is a reliable characteristic of filter‐aids, both kieselguhrs and perlites. When combined with the evidence of electronmicrographs, it gives excellent correlation between filtration theory and practice. Effective bed voidage is a more reliable characteristic than permeability when comparing different filter materials. A typical effective bed voidage for a bodyfeed grade filter‐aid is 37%. This is considerably less than the total voidage, which is a most inappropriate measurement for the assessment of filter‐aids, despite it being generally quoted.
ISSN:0046-9750
2050-0416
DOI:10.1002/j.2050-0416.1989.tb04623.x