Waste stabilization pond
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Waste stabilization ponds are ponds designed and built for wastewater treatment to reduce the organic content and remove pathogens from wastewater. They are man-made depressions confined by earthen st
Waste stabilization pond at Grand Agadir, Morocco (Station M’zar)
Effluent from a high rate algae pond and two maturation ponds in Attaouia, Morocco. Note the green color, caused by algae.
A poorly maintained anaerobic treatment pond in Kariba, Zimbabwe (sludge needs to be removed)
Main configurations of waste stabilization pond systems
Activated sludge
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The activated sludge process is a type of biological wastewater treatment process for treating sewage or industrial wastewaters using aeration and a biological floc composed of bacteria and protozoa.
Waste stabilization pond
…Waste stabilization ponds described here use no aerators. High-performance lagoon technology that does use aerators has much more in common with the activated sludge process. Such aerated lagoons use less area than is needed for traditional stabilization ponds and are also common in small towns. Sewage and many types…
Activated sludge tank at Beckton sewage treatment plant, UK. The white bubbles are due to the diffused air aeration system.
Activated sludge addition (seeding) to a pilot scale membrane bioreactor in Germany
Activated sludge under the microscope
Aerial photo of Kuryanovo wastewater treatment plant in Moscow, Russia