Experiences in Filtration

Baylis, John R.

doi:10.1002/j.1551-8833.1937.tb13966.x

Cited by 25 publications

(10 citation statements)

References 4 publications

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“…Valuable descriptive statements concerning the effects of these and other physical variables on the performance of filters have been made by several other investigators.s. [18][19][20][21][22][23][24][25][26][27][28][29] When contrasted with the models developed by Ives and others.v " these relationships appear quite straightforward. Despite their relative simplicity, however, equations of this type have not found wide application in engineering practice.…”

Section: Other Investiqationsmentioning

confidence: 99%

Theory of Water Filtration

O’Melia¹,

Stumm²

1967

Journal AWWA

121

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Section: Other Investiqationsmentioning

confidence: 99%

Theory of Water Filtration

O’Melia¹,

Stumm²

1967

Journal AWWA

121

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“…(I) direct sieving or based on the mechanisms by which sus-straining, (2) sedimentation, (3) in-ertial impingement and centrifugal collection, (4) Brownian movement, (5) chance contact caused by the convergence of fluid streamlines, (6) diffusion caused by a suspended-particle concentration gradient, (7) van der Waals effects, and (8) electrokinetic effects.…”

Section: -------Particle Removal Mechanisms-------mentioning

confidence: 99%

“…The first six mechanisms can be shown to depend primarily on physical and operational variables including: (1) sand size, (2) suspended-particle size, (3) suspended-particle density, (4) filtration velocity, (5) fluid viscosity, (6) fluid density, and (7) temperature.…”

Section: Physical Removal Mechanismsmentioning

confidence: 99%

Some Chemical Aspects of Rapid Sand Filtration

O’Melia¹,

Crapps²

1964

Journal AWWA

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This article considers past efforts and present knowledge concerning the filtration process, with particular emphasis on particle removal mechanisms, and presents the results of research demonstrating chemical effects in the filtration of ferric floc suspensions. The results of this research provide experimental evidence that the surface properties of ferric floc particles markedly affect their filtrability, and that these properties depend on the chemical composition of the aqueous phase. These chemical effects in the filtration process are considered to result from interactions between the surfaces of the filter medium and the suspended floc particles; this conclusion lends strong experimental support to adsorption as a predominant removal mechanism in rapid sand filters. The data presented in this article indicate to the authors that rapid sand filtration can be chemically controlled through the influence of selected chemicals on the adsorption of suspended particles to the filter media.

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“…3. The Baylis method of effective size determination gives excellent correlation of filter runs with filter material size (1,4,16).…”

Section: Resume Of Literaturementioning

confidence: 99%