SU1528740A1 - Air tank - Google Patents

Abstract

This invention relates to the treatment of waste water containing hardly oxidizable organic compounds. The purpose of the invention is to increase the degree of wastewater treatment. Aerotank includes corridor 1, in which transverse 5 and longitudinal 6 partitions are located, system 4 of pneumatic aeration and system 12 of supplying ozone-air mixture to the aeration tank. The transverse partitions are made with a notch 7 in the lower part. In the aeration chamber, the sludge mixture is saturated with air oxygen by the aeration system 4 and undergoes a process of biological oxidation. Transfusing through the edge 8 of the partition 6, the sludge mixture enters the ozonization chamber 13, and from there through the notches 7 in the partitions 5 into the aeration chamber 11. The invention allows to simplify the design of the aerotank, reduce the cost of its construction and operation, as well as increase the degree of water purification. 4 il.

Description

3

The invention relates to a biological treatment of wastewater, containing hardly oxidizable organic compounds, and can be used in the purification of industrial and domestic waste water with the aid of aerotanks.

The purpose of the invention is to increase the degree of wastewater treatment.

Figure 1 shows the aeration tank, a longitudinal section; figure 2 is the same, top view; on fig.Z - the same, cross section; figure 4 - the same general view.

Aerotank consists of a rectangular corridor 1 formed by side walls 2 and bottom 3. A pneumatic aeration of the sludge mixture 4, 4 transverse partitions 5 and a longitudinal partition 6 adjoining the transverse partitions 5, are located directly at the bottom 3. Each transverse partition 5 It has a notch 7 in the lower part, for example, of a rectangular shape, having a length not exceeding the width of the transverse partition 5. The transverse partitions 5 are installed so that the notches 7 in the adjacent partitions 5 are located along p znye longitudinal side walls 6, forming a hole at the bottom of the aeration tank for the passage of the mixed liquor in the transverse direction of the hall 1, and also extend to the water level in the passage 1. The partition 6 has an overflow edge 8 for the passage of the mixed liquor in the transverse passage 1 npravlenii. The longitudinal partition 6 at the bottom does not reach the bottom of corridor 1 and forms a hole 9, and at the top reaches the water level in the corridor, forming a gap 10. On the opposite sides of the system 4 are pneumatic aeration located in chamber 11 of aeration formed by adjacent transverse 5 and longitudinal 6 partitions , placed the system 12 for supplying the ozone-air mixture to the aeration tank, to the chamber 13 for ozonization of the sludge mixture.

Aerotank works as follows.

The silt mix as it moves along the aero tank through the cutout 7 in the transverse partition 5 enters the aeration chamber formed by the transverse 5 and the longitudinal 6 partitions. Here, using the system 4 pneumatic aeration and silt, the mixture

0

five

0

five

five

0

five

0

five

0

With air oxygen and the active process of biological oxidation of sewage contaminants, the Air-water emulsion, formed by system 4, moves upward to overflow edge 8. As the emulsion moves up, the pressure in the liquid decreases to atmospheric, release of dissolved air occurs, and upon contact with with the open surface of the aerotank - degassing sludge mixture. Partition 6 eliminates accidental entry of air bubbles into the ozonation zone. The silt mix enters the ozonation zone, coming into contact only with atmospheric air, flowing over the overflow edge 8. The silt mixture released from air bubbles moves downward to the notch 7. Here, towards the flow of the silt mixture, the ozone-air mixture moves, dispersed using a system 12 .

The countercurrent movement of the silt and ozone-air mixture allows the bubbles of the ozone-air mixture to remain suspended, by equalizing the lifting force of the gas bubble and the hydrodynamic pressure on it from the bottom up. A part of the sludge mixture from the ozonation chamber 13 due to the lifting force of the emulsion formed in the aeration chamber i1 and the dilution in the notch 7 is fed to the aeration zone of the chamber 11. for example, carbon dioxide, oxides of nitrogen, etc.), is aerated for a predetermined time required for further biological oxidation of wastewater pollution, and is fed for re-ozonation through overflow edge 8 into chamber 13 Zoning. Such cycles aeration - ozonation - aeration - ozonation can be performed somewhat depending on the size of the notches 7 and the depth of the overflow edge 8. The cycle time is determined by the amount of air supplied to the system 4 pneumatic aeration. After several cycles, the wastewater biologically purified with ozonation through a cutout 7 sent 51

are in the AIROTEN CRIDOR 1 for further biological treatment.

Claims (1)

The invention allows to simplify the design of the aerotank, reduce the cost of its construction and operation, as well as increase the degree of water purification in the COD, MIC. and suspended substances. Invention Formula Aerotank containing a rectangular case formed by side walls and bottom and divided by a vertical longitudinal partition into communicating corridors, transverse 287406 partitions, systems of pneumatic aeration and introduction of the osonn-air of the ll mixture into the aeration tank, with the fact that, in order to improve the wastewater treatment, the transverse partitions are made with a notch in the lower part, They are half of their width, the longitudinal partition is made not for income n (to the bottom of the aero- teic and to the upper level of the side walls, while the transverse partitions are set so that the notches of the adjacent partitions are located on 5 different sides of the longitudinal partition.  ten (pU2.Z