Results 291 to 300 of about 21,331 (339)

Phytoplankton as bioindicator for waste stabilization ponds

Journal of Environmental Management, 2012
Waste stabilization ponds are an appropriate technology for domestic onsite wastewater treatment. It is a low-cost technology, requires low maintenance, is highly efficient, mostly natural and remarkably sustainable. In facultative ponds, the existence of an algal population is very important for the stability of the symbiotic relation with aerobic ...
Caterina, Amengual-Morro, Gabriel, Moyà Niell, Antoni, Martínez-Taberner   +2 more
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Waste Stabilization Ponds and Lagoons

2009
One of the simplest forms of biological treatment processes is the stabilization pond or stabilization lagoon. It is also the most common industrial wastewater treatment facility. This versatile installation serves many basic purposes, including: (a) storage or impoundment of wastewater; (b) settling and removal of suspended solids; (c) storage or ...
Nazih K. Shammas, Lawrence K. Wang, Zucheng Wu   +2 more
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Hydraulic Modeling for Waste Stabilization Ponds

Journal of the Environmental Engineering Division, 1981
Treatment performance of waste stabilization ponds is a function of both the hydraulic transport and the biological and chemical transformation processes within the pond. Both the efficient hydraulic design of these ponds and the appropriate mathematical models for describing the hydraulic transport process are identified.
Raymond A. Ferrara, Donald R.F. Harleman
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Light penetration in waste stabilization ponds

Water Research, 1994
Abstract The penetration of light into waste stabilization ponds was studied because of its importance in pathogen removal and algal productivity. The attenuation of light in ponds was dominated by light absorption by gilvin (also called dissolved yellow matter or humic substances) and algae, light scattering processes (turbidity) being of no ...
Curtis TP, Mara DD, Dixo NGH, Silva SA
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Waste Stabilization Ponds in Europe

Water and Environment Journal, 1992
ABSTRACTThe European countries where sewage treatment in waste stabilization ponds is largely developed and commonly used are West Germany (more than 2000 operational systems) and France (about 2500 plants). Portugal has over 50 systems at present and will have about 100 by the year 1993.
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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
openaire   +1 more source

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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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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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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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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