Research Article
Jun 1981
Integral Analysis of Water Plant Performance
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VIEW THE REPLYAuthors: Brian L. Ramaley, AM.ASCE, Desmond F. Lawler, William C. Wright, and Charles R. O’Melia, M.ASCEAuthor Affiliations
Publication: Journal of the Environmental Engineering Division
Volume 107, Issue 3
Abstract
The removal of particles in water treatment plants through flocculation, sedimentation, and filtration depends on the design of each treatment process and physical characteristics of the raw water supply. Mathematical models, based on design variables for each process and the size distribution and density of the particles in the water, have been developed and linked to predict performance for a typical plant. The models for flocculation and sedimentation allow for broad particle sized distributions, but the filter model is limited to monodisperse suspensions. Quantitative predictions of the effects of changing values of the design variables on the performance of subsequent processes are evaluated. Filtrate concentration and head loss development are sensitive to changes in the velocity gradient during flocculation, the detention time in sedimentation, and the media size in filtration. Suspensions comprised primarily of inorganic particles require higher velocity gradients, longer settling times, and smaller filter media to produce acceptable finished water quality than suspensions containing amorphous precipitates.
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Published In
Journal of the Environmental Engineering Division
Volume 107 • Issue 3 • June 1981
Pages: 547 - 562
Copyright
© 1981 American Society of Civil Engineers.
History
Published in print: Jun 1981
Published online: Feb 11, 2021
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Authors
Affiliations
Brian L. Ramaley, AM.ASCE
Engr., James M. Montgomery Consulting Engrs., Inc., Pasadena, Calif. 91101
Desmond F. Lawler
Asst. Prof., Dept. of Civ. Engrg., Univ. of Texas at Austin, Austin, Tex. 78712
William C. Wright
Asst. Engr., Stearns and Wheler Civ. and San. Engrs., Cazenovia, N.Y. 13035
Charles R. O’Melia, M.ASCE
Prof., Dept. of Geography and Environmental Engrg., The Johns Hopkins Univ., Baltimore, Md. 21218
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.