JPS60102995A - Sewage-treating device - Google Patents

Abstract

PURPOSE:To facilitate fitting, replacement and maintenance, by a method wherein a plurality of power-transmitting means having an elongate annular form are so provided as to be circulated in a sewage-treating tank, and a multiplicity of aerating assemblies are fitted between the power-transmitting means. CONSTITUTION:The aerating assemblies 2 fitted to an upper half of a roller chain 3 fitted in an annular form are gradually moved in air in the direction of an arrow, are inverted at the left end, and are submerged in the sewage. Then, they are moved in the sewage in the opposite direction, are inverted up at the right end, and are again moved in air in the direction of the arrow. Thus, a group of aerobic microorganisms stick to and propagate on a multiplicity of treating plates 10 on the aerating assemblies 2, absorb oxygen from air concurrently with the movement of the assemblies 2, and take contaminants from the sewage, whereby the sewage is biochemically cleaned. The cleaned water is discharged through a treated water outlet port 31 of the treating tank 1.

Description

[Detailed description of the invention] The present invention relates to an aeration type sewage treatment device.

Conventionally, a sewage treatment apparatus using a rotating disk method has been used as an apparatus for treating a relatively small amount of sewage containing organic matter. This device has a number of rotating disks arranged in a skewer shape at intervals around a single rotating shaft, the lower halves of these rotating disks are immersed in wastewater guided into a tank, and the disks are placed in this state. By rotating slowly, aerobic microorganisms grow on the rotating disk, absorbing oxygen from the air as it rotates, and ingesting pollutants from the wastewater, biochemically purifying the wastewater. It is a device.

However, this device has the following drawbacks. That is, (1) as the process progresses, dirt adheres to the disk, which gradually becomes heavier and the load on the rotating shaft increases. ■In order to improve sewage treatment capacity, it is necessary to increase the size of the disk to increase the treatment area (
Although it is preferable to do so, it increases the weight and also increases the burden on the rotating shaft, so there is a limit. At the same time, restrictions arise from the aspect of transportation. ■Since the rotary shaft mortar body cannot be submerged in water, part of the disc around the shaft cannot be used effectively, resulting in poor efficiency.
・. ■It is difficult to remove and replace the disks, especially the intermediate disks, from the rotating shaft due to damage, etc., and maintenance management is generally troublesome.

The present invention has been made in view of the above circumstances, and aims to change the idea of rotating a disk in the conventional rotating disk method.
Therefore, it is an object of the present invention to provide a highly efficient sewage treatment device that solves the above-mentioned problems at once.

That is, in the present invention, a plurality of power transmission means in the form of a longitudinal ring are installed together so as to circulate up and down the wastewater treatment tank, and a large number of aeration part assemblies are installed between the power transmission means, so that the aeration This is a sewage treatment device characterized in that parts and assemblies are circulated alternately between air and water.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In Figures 1 to 3, 1 is a rectangular treatment tank with an open top, 2 is an aeration section assembly with multiple units, and 3 is a treatment tank 1.
A pair of longitudinal annular circulating roller chains 4 are stretched along the long edges of the roller chains 73, and numeral 4 is a sprocket that respectively locks the roller chains 73 and rotates them.

The aeration part assembly 2 is composed of a mounting member 8 whose both ends are removably fixed to an annular roller chain 3 that moves in the same direction relative to each other, and a treatment plate 10 for colonizing a large number of microorganisms on the mounting part. has been done. Such aeration part assembly 2
are provided around the annular roller chain 3.

The processing plate 10 is made of a synthetic resin material such as polyethylene, expanded polystyrene, or vinyl chloride, or other material and structure suitable for the processing plate, such as a hearth material.

In addition, the processing plate 10 is designed so that its size, number, etc. can be changed and replaced as appropriate depending on processing conditions, operating conditions, etc.
It is preferable to have a configuration in which standards are set in advance.

The roller chain 3 is provided with a chain guide 15 on its lower side, and the chain guide 15 holds and guides a roller chain 73 that moves together with a large number of aeration section assemblies 2. Note that this roller chain 3 may be replaced by other power transmission means having the same function.

The sprockets 4 are arranged on rotating shafts at positions close to the inner wall of the processing tank 1, and the rotating shafts equipped with the sprockets 4 are located at both ends of the processing tank 1, and are rotated by bearings 21 provided there. Each can be pivotally supported. n is a drive motor, which rotates the rotating shaft portion at an appropriate speed via a conventional speed reduction and transmission means.

Shu indicates the raw water inlet of the treatment tank 1, 31 indicates the treated water outlet, and 32 indicates the water level of the waste water.

After the treatment tank IK is filled with a predetermined amount of wastewater, the drive motor n is driven to rotate the interlocking sprocket 4.

As the sprocket 40 rotates, the opposing roller chains 3 move in the same direction, and the aeration section assembly 2 mounted on the roller chains 3 begins to move in the negative direction. That is,
The upper half of the aeration section assembly 2 of the roller chain 3 stretched in a ring shape gradually moves through the air in the direction of the arrow, turns around at the left end, and is submerged in the waste water.

After moving in the opposite direction through the wastewater, it reverses upward at the right end and moves through the air in the direction of the arrow again. That is, a large number of aeration unit assemblies 2 are arranged around the roller chain 3.
However, this kind of action is repeated...

In this way, aerobic microorganisms adhere and propagate on a large number of treatment plates 10 on the aeration section assembly 2, and as they move and rotate, they absorb oxygen from the air and ingest pollutants from the wastewater, causing biochemical damage. sewage is purified. The purified water is discharged from the treated water outlet 31 of the treatment tank 1.

FIG. 4 shows another embodiment of the invention, showing an aeration section assembly 42.
The mounting member 48 is a block-shaped piece made by integrally laminating corrugated sheets, or a wire mesh cage formed integrally filled with a filling material with a large surface area, or a large number of treated members made by cutting pipes. is fixed to each roller chain by. The operation and effects are the same as those in the previous embodiment.

FIG. 5 shows an example of how the apparatus according to the present invention is used, in which a plurality of apparatuses 51 are stacked and communicated with each other in sequence to perform continuous treatment of wastewater. With this configuration, the processing capacity per installation area can be increased.

As described above, according to the device of the present invention, an appropriate number of aeration section assemblies can be removed or assembled from appropriate positions on the roller chain, and the rotating shaft can be moved as in the conventional rotating disk method device. Compared to the case where the disk must be removed from its end or assembled, assembly is easier to replace, easier to respond to specification changes (and maintenance management is extremely easy. The same applies to the replacement and assembly of treatment plates in individual aeration unit assemblies, an effect that cannot be obtained with conventional rotating disk method equipment.In addition, regarding the size, configuration, and material of this treatment plate, there are It would be extremely convenient to have a variety of predetermined standards available and to be able to replace them at any time according to the specifications.

In addition, in the conventional rotating disk method apparatus, a part of the disk around the rotation axis could not be submerged in water, resulting in poor utilization of the processing area, but in the apparatus of the present invention, the entire processing plate Since the area can be submerged in water at an angle of 1°, the processing area can be used effectively.

Therefore, the installation area occupied by the entire device is smaller than that of conventional devices, and a highly efficient device can be obtained. It is also advantageous in terms of transportation.

On the other hand, the load generated by the weight and drive of a large number of processing plates is shared and supported by two rotating shafts installed at both ends of the processing tank and a chain guide installed at the bottom of the roller chain. High efficiency can be achieved without any restrictions due to increased load on the rotating shaft in conventional equipment.

[Brief explanation of the drawing]

Fig. 1 is a conceptual side sectional explanatory view of an embodiment of the sewage treatment device according to the present invention, Fig. 2 is a conceptual plan explanatory view with some parts omitted, and Fig. 3 is an aeration diagram. FIG. 4 is a perspective view showing another embodiment of the aeration unit assembly, and FIG. 5 is an explanatory view showing one mode of use of the device according to the present invention. be. 1... Sea... Treatment tank, 2... Aeration section assembly,
3... Roller chain, 8... Mounting member, 10... Processing plate.

Claims (1)

[Claims] A plurality of power transmission means in the form of a longitudinal ring are installed so as to circulate up and down the wastewater treatment tank, and a number of aeration section assemblies are installed between the power transmission means, and the aeration section assemblies are placed in the air. A sewage treatment device characterized by alternately circulating and moving between water and water.