Show simple item record

contributor authorJohn M. H. Barton
contributor authorSteven G. Buchberger
date accessioned2017-05-08T21:56:13Z
date available2017-05-08T21:56:13Z
date copyrightFebruary 2007
date issued2007
identifier other%28asce%290733-9372%282007%29133%3A2%28211%29.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/67042
description abstractThis paper investigates how straining mechanisms of angular media (crushed limestone) provide improved filtration performance compared to rounded media (river stone). Columns of granular media were set in resin, sectioned, photographed, and digitized to produce a three-dimensional model of pore space geometry. This process was repeated for four filter media, each representing different grain shapes or packing densities. From measured pore throat distributions, a stepwise particle movement model was used to estimate the maximum volume of particles that could be stored in the bulk of the filter media. The results showed that the more angular the media, the wider the range of particle sizes that could be strained in the bulk of the filter. The stepwise model was applied only to individual particles; trapping of colloidal particles was not considered. However, when individual particles are too small to be strained, the same pore throat trapping contributes to the physical capture of avalanches and flocculates. Thus the findings of this work are relevant to deep bed filtration applications where headloss results from straining, such as storm-water best management practices or soil filters.
publisherAmerican Society of Civil Engineers
titleEffect of Media Grain Shape on Particle Straining during Filtration
typeJournal Paper
journal volume133
journal issue2
journal titleJournal of Environmental Engineering
identifier doi10.1061/(ASCE)0733-9372(2007)133:2(211)
treeJournal of Environmental Engineering:;2007:;Volume ( 133 ):;issue: 002
contenttypeFulltext


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record