Similitude Interpretation of Jar Test Data
Publication: Journal of Environmental Engineering
Volume 110, Issue 3
Abstract
A method for using a modified jar test in conjunction with a hydraulic similitude calculation was developed to predict sedimentation basin performance. The method was tested at the Mark B. Whitaker Water Treatment Plant in Knoxville, Tennessee, for field verification. A comparison of jar test turbidity data collected at settling times controlled by the similitude calculations versus the turbidity of the sedimentation basin effluent was very close to ideal (one‐to‐one relationship). The settling data suggested that a measurement of the floe size distribution might be a more reliable method for coagulant dosage control. Jar test settling time had a significant effect on the selection of the operating dosage. Therefore, if a jar test is used, the sample time must be related to the hydraulic conditions of the treatment plant.
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References
1.
Camp, T. R., “Studies of Sedimentation Basin Design,” Sewage Industrial Wastes, Vol. 25, No. 1, 1953.
2.
Hudson, H. E., Water Clarification Processes, Van Nostrand Reinhold Co., New York, N.Y., 1981, pp. 40–64.
3.
Lai, R. J., Hudson, H. E., and Singley, J. E., “Velocity Gradient Calibration of Jar Test Equipment,” Journal American Water Works Association, Vol. 67, No. 10, 1975, pp. 553–557.
4.
Wang, H. F., and Anderson, M. P., Introduction to Groundwater Modeling: Finite Difference and Finite Element Methods, W. H. Freeman and Co., San Francisco, Calif., 1982.
Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 110 • Issue 3 • June 1984
Pages: 670 - 677
Copyright
Copyright © 1984 ASCE.
History
Published online: Jun 1, 1984
Published in print: Jun 1984
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