Patent ID: 6620323
Filing Date: 2003-09-16
Classification: B01D,C02F,Y02W

Abstract:
An apparatus for biological wastewater purification comprising:a) an activation tank in which, with supply of a catalyst, wastewater constituents are degraded by degradation means suspended in the wastewater; b) at least one lamellae pack disposed in the activation tank for separating the degradation means from the wastewater by sedimentation, to fall as thickened degradation sludge into the bottom region of the activation tank; and c) means for recirculating the degradation sludge which is disposed in the bottom region of the activation tank, which recirculating means takes up the thickened degradation sludge and recirculates it back toward an inlet of the activation tank as suspended degradation means for suspension in the wastewater, and wherein the recirculating means includes a sludge collection channel and at least one siphon pipe in communication with the bottom region of the activation tank and the sludge collection channel for transport of the degradation sludge from the bottom region of the activation tank to the sludge collection channel via a siphoning action.