Media Design Factors for Fixed-Bed Filters

Laboratory-scale anaerobic filters were used to identify major parameters (specific surface area cross-flow versus tubular-flow configuration, and angular orientation of the flow channels) for selecting media. Increasing the specific surface area from 100 to 223 ${\rm m}^{2}/{\rm m}^{3}$ increased w...

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Bibliographic Details
Published in:	Journal - Water Pollution Control Federation 1986-02, Vol.58 (2), p.115-121
Main Authors:	Song, Ki-Ho, Young, James C.
Format:	Article
Language:	eng
Subjects:	Applied sciences Biofilms Biological and medical sciences Biological treatment of waters Biotechnology Chemical oxygen demand Cross flow Environment and pollution Exact sciences and technology Focus on: Anaerobic Processes Fundamental and applied biological sciences. Psychology General purification processes Industrial applications and implications. Economical aspects Loading rate Pollution Porosity Surface areas Suspended solids Volume Wastewater Wastewater treatment Wastewaters Water treatment and pollution
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Summary:	Laboratory-scale anaerobic filters were used to identify major parameters (specific surface area cross-flow versus tubular-flow configuration, and angular orientation of the flow channels) for selecting media. Increasing the specific surface area from 100 to 223 ${\rm m}^{2}/{\rm m}^{3}$ increased waste treatment efficiency only 5 to 10%. The cross-flow configuration was a major design parameter; it provided up to 25% greater waste treatment removal efficiency than did tubular-flow media. No plugging occurred with any media configuration tested, but measurement of attached solids suggested that plugging would become more likely as the slope of the interstitial channels decreased with respect to a horizontal plane. The optimum interstitial channel slope, in terms of long-term resistance to plugging, structural strength, and treatment efficiency, was between 45° and 60°.
ISSN:	0043-1303 2327-7467