A septic tank is a key component of a septic system, a small-scale sewage treatment system common in areas that lack connection to main sewage pipes provided by local governments or private corporations.
Other components may include pumps, alarms, sand filters, and clarified liquid effluent disposal methods such as a septic drain field, ponds, natural stone fiber filter plants or peat moss beds.
Otherwise the septic tank fills up and wastewater containing undecomposed material discharges directly to the drainage field.Wastewater enters the first chamber of the tank, allowing solids to settle and scum to float. Bekanntschaften treuchtlingen The settled solids are anaerobically digested, reducing the volume of solids.A piping network, often laid in a stone-filled trench (see weeping tile), distributes the wastewater throughout the field with multiple drainage holes in the network.The size of the drain field is proportional to the volume of wastewater and inversely proportional to the porosity of the drainage field.
Single chamber septic tank design
The entire septic system can operate by gravity alone or, where topographic considerations require, with inclusion of a lift pump.Certain septic tank designs include siphons or other devices to increase the volume and velocity of outflow to the drainage field.This avoids mixing digested sludge with incoming sewage.Also, some septic tank designs have a second stage where the effluent from the anaerobic first stage is aerated before it drains into the seepage field.These help to fill the drainage pipe more evenly and extend the drainage field life by preventing premature clogging or bioclogging.