![]() ![]() Therefore, the accumulated fecal sludge must be periodically removed, which is commonly done with a vacuum truck. The rate of accumulation of sludge-also called septage or fecal sludge-is faster than the rate of decomposition. Septic tanks can be coupled with other onsite wastewater treatment units such as biofilters or aerobic systems involving artificially forced aeration. The term "septic" refers to the anaerobic bacterial environment that develops in the tank that decomposes or mineralizes the waste discharged into the tank. Nonetheless, groundwater pollution may occur and can be a problem. The treated liquid effluent is commonly disposed in a septic drain field, which provides further treatment. They can be used in areas that are not connected to a sewerage system, such as rural areas. Septic tank systems are a type of simple onsite sewage facility. Settling and anaerobic digestion processes reduce solids and organics, but the treatment efficiency is only moderate (referred to as "primary treatment"). during floods Ī septic tank is an underground chamber made of concrete, fiberglass, or plastic through which domestic wastewater ( sewage) flows for basic sewage treatment. Groundwater pollution, water pollution e.g. Single tank or multi-chamber septic tanks (potentially with baffles) Household, public, shared (most common is household level) īlackwater (waste), greywater, brownwater ![]() Household or neighborhood level (schools, hotels etc.) Septic tankĪ septic tank being installed in the groundĬollection and storage/treatment (on-site) For the band of the same name, see Septic Tank (band). ![]()
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