Imhoff tank
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The Imhoff tank, named for German engineer Karl Imhoff, is a chamber suitable for the reception and processing of sewage. It may be used for the clarification of sewage by simple settling and sediment
Imhoff tank. a - upper chamber, b-c - outlet for sludge, d - outlet for biogas (would need to be higher), f - lower chamber, g - slot for sludge to pass from the upper to the lower chamber, h - height.
View from above an empty Imhoff tank
Sewage treatment
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Sewage treatment is a type of wastewater treatment which aims to remove contaminants from sewage to produce an effluent that is suitable for discharge to the surrounding environment or an intended reu
Activated sludge sewage treatment plant in Massachusetts, US
Rural Kansas lagoon on private property
Aeration tank of activated sludge sewage treatment plant (fine-bubble diffusers) near Adelaide, Australia
A poorly maintained anaerobic treatment pond in Kariba, Zimbabwe (sludge needs to be removed)