Aerobic treatment tank and wastewater treatment device

Abstract

The present invention provides an aerobic treatment tank capable of increasing the processing capacity of aerobic treatment, and a wastewater treatment apparatus equipped with this aerobic treatment tank. [Solution] The aerobic treatment tank 1 is configured to perform aerobic treatment on the water to be treated while allowing it to flow down along the bottom plate 2. The aerobic treatment tank 1 has a bottom plate 2 and side plates 3 erected around the bottom plate 2. The side plates 3 have ventilation holes 31 which include an outer opening 311 that opens to the external space of the aerobic treatment tank 1, an inner opening 313 that opens to the internal space 11 of the aerobic treatment tank 1, and a connecting part that connects the outer opening 311 and the inner opening 313.

Claims

1. An aerobic treatment tank in which water to be treated is flowed down along a bottom plate while undergoing aerobic treatment, The aerobic treatment tank comprises the bottom plate and, It has side plates erected around the base plate, The side plate has an outer opening that opens to the external space of the aerobic treatment tank, An inner opening that opens into the internal space of the aerobic treatment tank, An aerobic treatment tank having a ventilation hole with a connecting portion that connects the outer opening and the inner opening.

2. The aerobic treatment tank according to claim 1, wherein the aerobic treatment tank has a plurality of side plates, including a first side plate extending in a direction along the flow direction of the water to be treated and a second side plate positioned opposite the first side plate, and the ventilation holes are provided in at least one of the first side plate and the second side plate.

3. The aerobic treatment tank according to claim 1, wherein the inner opening is located lower than the outer opening.

4. The aerobic treatment tank according to claim 3, wherein the connecting portion extends linearly from the outer opening to the inner opening.

5. The aerobic treatment tank according to claim 4, wherein the aerobic treatment tank has a plurality of side plates, including a first side plate extending in a direction along the flow direction of the water to be treated and a second side plate positioned opposite the first side plate, and the ventilation holes are provided in at least one of the first side plate and the second side plate.

6. The aerobic treatment tank according to claim 5, wherein the bottom plate has a watertight plate extending in a direction intersecting the flow direction of the water to be treated, and the ventilation holes are arranged such that when the center line passing through the center of the outer opening and the center of the inner opening of the ventilation hole is extended to the height of the upper end of the watertight plate closest to the ventilation hole in the flow direction of the water to be treated, the extension of the center line intersects a horizontal plane passing through the upper end of the watertight plate at the central position in the width direction of the aerobic treatment tank or at a position closer to the ventilation hole than the central position.

7. The aerobic treatment tank according to any one of claims 1 to 5, wherein the opening area of ​​the inner opening is smaller than the opening area of ​​the outer opening.

8. The aerobic treatment tank according to any one of claims 1 to 5, wherein the connecting portion has a circular cross-sectional shape in a cross section perpendicular to its extending direction.

9. The aerobic treatment tank according to any one of claims 1 to 5, further comprising a wind deflector plate positioned above the bottom plate and extending in a direction parallel to the side plate having the ventilation holes, wherein at least a portion of the wind deflector plate protrudes above the aerobic treatment tank.

10. The aerobic treatment tank according to any one of claims 1 to 5, wherein the bottom plate has a water-blocking plate extending in a direction intersecting the flow direction of the water to be treated.

11. The aerobic treatment tank according to any one of claims 10, wherein the inner opening is positioned above the upper end of the water-blocking plate that is closest to the inner opening in the direction of the flow of the water to be treated.

12. The aerobic treatment tank according to any one of claims 1 to 6, further comprising a microbial carrier arranged in the space within the tank, wherein the inner opening of at least one of the ventilation holes faces the microbial carrier.

13. It has multiple wastewater treatment tanks for treating the water to be treated. A wastewater treatment apparatus wherein at least one of the plurality of wastewater treatment tanks is an aerobic treatment tank according to any one of claims 1 to 6.

14. The wastewater treatment apparatus according to claim 13, wherein other wastewater treatment tanks are arranged at intervals above the aerobic treatment tank, and a wind deflector is positioned between them, the wind deflector extending in a direction parallel to the side plate having the ventilation holes in the aerobic treatment tank.

15. The wastewater treatment apparatus according to claim 13, wherein some of the wastewater treatment tanks are anaerobic treatment tanks that perform anaerobic treatment on the water to be treated.

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