JPS6059040B2 - Rotating plate type sewage treatment equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a rotating plate type sewage treatment apparatus.

Conventionally, a rotary plate is connected to a horizontally supported shaft, the lower part of which is immersed in waste water, and a bottomed container opened in the direction of rotation is provided around the rotary plate. A device for improving sewage treatment capacity by supplying air trapped in the container as bubbles into the wastewater as the container rotates, and causing the sewage in the container lifted into the air to fall. be.

By the way, the container may be bowl-shaped, box-shaped, or long like a pot.

However, since the bowl-shaped or box-shaped ones require a large number of attachments to the rotary plate, manufacturing is cumbersome and time-consuming. Further, since the number of the tube-shaped containers attached to the rotary plate is small, manufacturing is easy, but it is necessary to provide a bottomed container parallel to the axial direction of the rotary plate. If they are not parallel, the air bubbles supplied from the container into the wastewater will not be generated evenly from the entire opening of the container, and when the wastewater falls from the container, it will not flow out evenly from the entire opening of the container. This reduces the efficiency of wastewater treatment. This invention has been made in view of the above-mentioned circumstances, and the bottomed container is shaped like a trough, and the opening side of the container on the rotation center side is formed in an uneven shape over the entire length, so that the container can be moved in the axial direction. On the other hand, even if the container is attached to the rotary plate at a slight incline, the air bubbles will be generated from the entire opening of the container, or the sewage will flow out and fall, ensuring a sufficient amount of oxygen supply to microorganisms and improving the sewage treatment capacity. There is an attempt to provide a rotary sewage treatment device that can be improved.

[Example] Reference numeral 1 indicates a tank of this sewage treatment equipment, and although details are not shown, sewage W to be treated is supplied from one side of this tank 1.
It is assumed that one flows into the other and is processed and discharged from the other.

A shaft 2 is horizontally and rotatably supported above the tank 1.

Although the details of the shaft 2 are not shown in the drawings, the shaft 2 is slowly rotated by power means. Reference numeral 3 denotes a rotary plate in which a large number of rotary plates are connected integrally with the shaft 2.

The rotary plate 3 is usually composed of a disk made of synthetic resin. 4 is provided around the outer periphery of the rotary plate 3 with an opening in the direction of rotation thereof;
It is a container with a bottom.

The container 4 is long in the direction of the axis 2 and has a closed end, and the opening side 4a of the container 4 on the rotation center side is formed in a sawtooth-like uneven shape over the entire length. Furthermore, the operation of this embodiment will be described.

The shaft 2 is now gently rotated in the direction of the arrow shown.

Along with this, the rotating plate 3 also rotates slowly, and as is well known in the art, microorganisms adhere to the rotating plate 3 (including the container 4), and these microorganisms take in oxygen in the air, causing sewage to flow into the water. Process W. At this time, the rising container 4 is filled with sewage W, and as it tilts as the rotary plate 3 rotates, the sewage W flows from the concave portion over the entire opening side 4a.
flows out, becomes droplets S, and falls on the surface of the wastewater W in the tank 1.

At this time, since the droplets S hit the rotating plate 3, the rotating plate 3 can effectively take in oxygen from the droplets S that have a large amount of dissolved oxygen. Air is drawn into the tank 1 to increase the amount of dissolved oxygen in the wastewater W in the tank 1. Furthermore, air A is trapped in the container 4 that is descending underwater, and as the container 4 is successively tilted, the air becomes small bubbles B from the recesses over the entire opening side 4a, and the sewage W rise inside. At this time, oxygen from the bubbles B dissolves into the wastewater W, and the amount of dissolved oxygen in the wastewater W further increases. [Effects of the Invention] As described above, the present invention is such that the container 4 is long in the direction of the axis 2 and has a bow shape with both ends closed.
Since the opening side 4a on the side of the rotation center is formed in an uneven shape over the entire length, even if the container 4 is attached to the rotary plate 3 at a slight inclination with respect to the direction of the axis 2, the narrow opening side 4a can be formed from the concave part over the entire opening side 4a. Bubbles B can be generated in the waste water W, or droplets S can be caused to fall onto the surface of the waste water W.

Therefore, the amount of dissolved oxygen in the wastewater W is increased compared to the conventional method, and the wastewater treatment capacity is improved.

[Brief explanation of drawings]

The figures all show embodiments of the present invention, with FIG. 1 being a sectional view and FIG. 2 being a sectional view taken along arrows 1--2 in FIG. 1...tank, 2...shaft, 3...
Rotating plate, 4...bottomed container, 4a...opening side, A...air, B...cell, S...
...Splash, W...Sewage.

Claims (1)

[Claims] 1. A rotary plate type sewage treatment device in which a rotary plate is connected to a horizontally supported shaft, the lower part of which is immersed in waste water, and a bottomed container that is opened in the direction of rotation is provided around the rotary plate, The rotary plate type, wherein the bottomed container is long in the direction of the axis and has a shape with both ends closed, and the opening side of the bottomed container on the rotation center side is formed in an uneven shape over the entire length. Sewage treatment equipment.