Abstract: The invention relates to a device for purifying anaerobic biological wastewater, which wastewater is fed in through a feed pipe (4) and the purified wastewater and built-up gas are removed respectively by a discharge pipe (24) and a gas outlet pipe (18), said device comprising a main chamber (1), wherein wastewater, which is to be clarified, is fed to a lower area and at least one lifting pipe (9), which is used to remove the built-up gas and the purified wastewater, which contains sludge particles, emerges from an area which is higher than said lower area, said lifting pipe joining a return tank (2) in order to separate gas and purified wastewater, which contains sludge particles, and the outlet (11) thereof m the return tank (2) being higher than the inlet (10) thereof in the main chamber (1).

Abstract: The invention relates to a device for purifying anaerobic biological wastewater, which wastewater is fed in through a feed pipe (4) and the purified wastewater and built-up gas are removed respectively by a discharge pipe (24) and a gas outlet pipe (18), said device comprising a main chamber (1), wherein wastewater, which is to be clarified, is fed to a lower area and at least one lifting pipe (9), which is used to remove the built-up gas and the purified wastewater, which contains sludge particles, emerges from an area which is higher than said lower area, said lifting pipe joining a return tank (2) in order to separate gas and purified wastewater, which contains sludge particles, and the outlet (11) thereof m the return tank (2) being higher than the inlet (10) thereof in the main chamber (1).