Closed tank in which sludge is in direct contact with domestic wastewater passing through the structure. Solid organic matter is partially decomposed by the action of anaerobic bacteria.
Composed of one compartment in which the sedimentation and liquefaction of the organic matter present in the wastewater takes place. Anaerobic bacteria, without oxygen, are responsible for metabolising organic matter by gasifying, hydrolysing and mineralising it. The incorporation of a pre-filter prevents the release of suspended solids and protects the treatment device from clogging risks.
Use of plastic substrates avoids maintenance problems arising from use of mineral substrates.
NOTE: The tank is called “all water” when it receives all the wastewater from the house.