FIELD: biological treatment of domestic wastewater.
SUBSTANCE: block contains a housing divided by partitions into several technological zones - a denitrification zone, a deoxidation zone, an aeration zone, a secondary sump, a zone for collecting excess and circulating activated sludge. In the lower part of the partition separating the denitrification zone and the aeration zone, holes are made to ensure the flow of treated water from one zone to another. In the upper part of the partition separating the denitrification zone and the deoxidation zone, there is a hole with an insert that guides the flow. A partition is installed in the centre of the denitrification zone to create a circulating water flow. A pipeline for supplying wastewater is laid into the denitrification zone. Aerators are installed in the aeration zone. In the collection area of excess and circulating activate sludge, a pumping device for circulating activate sludge is installed. Axial pumps are installed in the denitrification zone, deoxidation zone, secondary clarifier (according to the first option) or in the denitrification zone and in the secondary clarifier (according to the second option). In the block according to the second option, in the lower part of the partition separating the denitrification zone from the aeration zone, holes are made to ensure the flow of purified water from one zone to another, in the upper part of the partition separating the denitrification zone from the secondary clarifier, a hole is made with an insert directing the flow. The secondary sump is made in the form of a rectangular container, on both sides of which in the upper part there are trays for supplying wastewater and trays for discharging biologically purified, clarified water. Inside the secondary clarifier, at an inclination to each other, guide partitions are made with bins for activate sludge, connected to trays for diverting biologically purified, clarified water. The activated sludge bins are connected to the activate sludge discharge pipeline. The trays for discharging biologically purified, clarified water are connected to a pipeline for discharging biologically purified, clarified water. Axial pumps are installed at the bottom of the tank. In the secondary sump according to the second option, aerators are installed at the bottom of the tank.
EFFECT: design simplification, increased service life, improved safety and quality of domestic wastewater treatment.
14 cl, 5 dwg, 1 tbl, 1 ex
