| 摘要 |
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 ). The return tank ( 2 ) is connected to an auxiliary chamber ( 3 ), wherein purified wastewater, which contains sludge particles and which was lifted to the return tank ( 2 ) via the at least one lifting pipe ( 9 ), flows out from the return tank ( 2 ) to the auxiliary chamber ( 3 ). The purified wastewater flows off to the discharge pipe ( 24 ) from an upper region of the auxiliary chamber ( 3 ) and the auxiliary chamber ( 3 ) is connected in a lower region via a valve, preferably a non-return valve ( 15 ), or a pump to a lower region of the main chamber ( 1 ).
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