Waste stabilisation ponds are large, manmade water bodies used for the treatment of wastewater by the means of naturally occurring processes, such as solar light, wind, and microbial activity. There are three types of ponds, anaerobic ponds, facultative ponds and aerobic or maturation ponds, each with different treatment and design characteristics. The ponds can be used individually, or linked in a series for improved wastewater treatment. Investment and operation costs are relatively low, but large surface areas far from housings are required.
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