Results 251 to 260 of about 1,463,576 (291)

Phosphorous Models for Waste Stabilization Ponds

Journal of Environmental Engineering, 1984
A laboratory investigation was conducted to evaluate the utilization and recycle of phosphorous in waste stabilization ponds (WSP). Two pond systems were operated under three different loading conditions during a period of 22 months. System I consisted of three series‐connected ponds: an anaerobic WSP followed by an intermediate facultative WSP and a ...
Harvey J. S. Houng, Earnest F. Gloyna
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Dispersion Model for Waste Stabilization Ponds

Journal of Environmental Engineering, 1985
The partially‐mixed or dispersed‐flow equation is proposed for use in pond design for organic and bacterial reductions. This equation considers the effects of hydraulic detention time (θ), reaction rate coefficients, and the dispersion factor including short‐circuiting, and other hydraulic transport processes which influence the pond's performance ...
Chongrak Polprasert, Kiran K. Bhattarai
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Sulfide Production in Waste Stabilization Ponds

Journal of the Sanitary Engineering Division, 1969
This investigation deals with the production and release of hydrogen sulfide from waste stabilization ponds, and required design modifications, resulting from increased sulfate or hydrogen sulfide content. A 6-ft deep facultative pond was operated under seven different operating conditions.
Earnest F. Gloyna, Ernesto Espino
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Design Principles of Waste Stabilization Ponds

Journal of the Sanitary Engineering Division, 1969
Waste stabilization ponds will be more effectively employed as pollution control systems if suitable design formula and corresponding design parameters are made available to design engineers. To accomplish this objective, an analogy has been drawn between a first-order chemical reactor and a waste stabilization pond.
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Loading Rates on Waste Stabilization Ponds

Journal of the Sanitary Engineering Division, 1969
Pond performance is affected by temperature, solar radiation, and wind-speed; therefore, facultative pond design should reflect the influence of local climatological conditions. Ponds located in mild climate areas are usually designed with higher loading rates than ponds in cold climate areas. Present recommended loading rates in the United States vary
Larry W. Canter, Andrew J. Englande, Alfred F. Mauldin   +2 more
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Boundary conditions for the waste stabilization pond

Water, Air, and Soil Pollution, 1990
Two different solutions of the dispersed flow model of the waste stabilization pond based on two different sets of boundary conditions were compared and analyzed statistically. These solutions, used in the prediction of the coliform reduction in the pond, were based on Hulbult's and Danckwerts' sets of boundary conditions.
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Algae Removal in Waste Stabilization Ponds

1989
Although waste stabilization ponds are generally considered to be suitable in small communities or for the treatment of industrial wastewaters, there are cases where they are considered to be appropriate for big cities also. They are in use at least 39 countries. They may become feasible if land is available at a low cost.
Ayşen Türkman, Füsun Şengül
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Treatment Efficiency of Waste Stabilization Ponds

Journal of the Sanitary Engineering Division, 1972
A practical method is given for evaluating the influence of the hydraulics on waste water pond performance. The analysis is based on time-concentration data collected at the outlet for tracer tests performed on prototype ponds and on a hydraulic model.
Kenneth A. Mangelson, Gary Z. Watters
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Pilot Waste‐Stabilization Pond in Tanzania

Journal of Environmental Engineering, 1992
It is claimed that waste‐stabilization ponds provide an efficient, inexpensive, and appropriate form of wastewater treatment for developing countries. Based on negative experiences in Tanzania, this paper concludes that waste‐stabilization ponds designed by standard western design practice cannot always be expected to perform well without at least ...
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Stability of kinetic models from waste stabilization ponds

Water Research, 1994
Abstract This paper studies the effect of small variations in the value of various parameters on solutions at steady-state in a kinetic model for wastewater stabilization ponds. An analytic method of study is developed together with a function of evaluation whose value provides a measure for stabilizing the results. It was found that the stability of
D. Prats, F. Llavador
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