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The system may consist of a single pond or several ponds in a series, each pond playing a different role in the removal of pollutants. After treatment, the effluent may be returned to surface water or reused as irrigation water (or reclaimed water ) if the effluent meets the required effluent standards (e.g. sufficiently low levels of pathogens ).
Facultative lagoon (polishing pond) providing tertiary treatment after a constructed wetland in Hamburg-Allermöhe, Germany. Overflow from the facultative lagoon may be routed through one or more polishing ponds supporting lower populations of anaerobic micro-organisms and a higher proportion of aerobic organisms adapted to survival in lower concentrations of organic material.
Recently completed infiltration basin for stormwater collection. An infiltration basin (or recharge basin) is a form of engineered sump [1] or percolation pond [2] that is used to manage stormwater runoff, prevent flooding and downstream erosion, and improve water quality in an adjacent river, stream, lake or bay.
Diagram of a solar pond. A solar pond is a pool of saltwater which collects and stores solar thermal energy. The saltwater naturally forms a vertical salinity gradient also known as a "halocline", in which low-salinity water floats on top of high-salinity water. The layers of salt solutions increase in concentration (and therefore density) with ...
The general idea of a warm little pond-like environment was subsequently echoed in abiogenesis theories following this initial proposal, notably the Oparin-Haldane theory. While it is unclear if he was aware of Darwin's 1871 letter, Soviet biochemist Alexander Oparin was known to subscribe to the Darwinian theory of evolution, which was widely ...
Molly's Falls Pond State Park is a 1,064-acre state park in Cabot and Marshfield, Vermont surrounding 411-acre Molly's Falls Pond, a reservoir that is also known as Marshfield Reservoir. This is an undeveloped, day-use park.