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The Horizontal-Flow Roughing Filter (HRF) is a series of differing size grains designed to remove particulate matter from water passing through it.

TitleDirect horizontal-flow roughing filtration : an improved pretreatment process for highly turbid water
Publication TypeMiscellaneous
Year of Publication1991
AuthorsAlaerts, GJ, Buiteman, JP, Ahsan, T
Pagination14 p. : tab., fig.
Date Published1991-01-01
Keywordscomparative analysis, direct filtration, horizontal roughing filtration, laboratory testing, pretreatment, turbidity removal
Abstract

The Horizontal-Flow Roughing Filter (HRF) is a series of differing size grains designed to remove particulate matter from water passing through it. Highly turbid water, for example, river water after a heavy rain, can drastically reduce the effective life of an HRF. Direct HRF (DHRF), a process which uses aluminum sulphate to flocculate particulate matter before passing the water over the smaller grained compartments of the filter, has proved to be effective in lengthening the run length and filtering capacity of an HRF. This paper compares the DHRF to other pretreatment methods such as plain sedimentation, pebble matrix filtration, prolonged storage and others. The conclusions are that the DHRF is not only cost effective, but simple to use and maintain; thereby proving itself a feasible low-cost technology for urban and semi-urban areas.

NotesIncludes bibliography
Custom 1255.4

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