JPH09267098A - Rotating contact type sewage treating device utilizing soil bacteria - Google Patents

Abstract

PROBLEM TO BE SOLVED: To have bacteria holding soil keep its shape without clustering on one side and being deformed during rotation by holding the bacteria holding soil by a soil holding core material in which synthetic resin or corrosion resistant metal such as stainless steel are formed into a three-dimensional net having the required shape and which is made to have the required shape such as a cyclotomic plate. SOLUTION: In a cyclotomic plate like rotating contact body 7, a soil holding core material 7a which synthetic resin or corrosion resistant metal such as stainless steel is made a three-dimensional net having the required shape to form is wrapped with a permeable bag material 7b consisting of synthetic resin, corrosion resistant metal or porous nonwoven fabric and further the outside thereof is surrounded by a coarse mesh net like shape holding member 7c similarly consisting of synthetic resin or corrosion resistant metal such as stainless material, and the permeable bag material 7b is filled with bacteria holding soil 10. In this way, the bacteria holding soil 10 is held in the shape of a cyclotomic plate by the soil holding core material 7a so that it may not cluster on one side, and comes into contact with sewage while the bacteria holding soil 10 is prevented from leaking to the outside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary contact type sewage treatment apparatus utilizing soil bacteria, which is incorporated in an apparatus for treating wastewater containing organic matter discharged from municipal sewage and various industries.

[0002]

2. Description of the Related Art Conventionally, treatment apparatuses for organic wastewater discharged from municipal sewage and various industries mainly purify by aerobic and anaerobic bacteria living in water. Cannot remove nitrogen and phosphorus, so it was difficult to clear the laws and regulations of BOD and COD.

[0003] Therefore, there are many types of microorganisms that can be compared with underwater microorganisms for organic wastewater treatment, and they have stronger oxidizing, reducing, and decomposing effects.
Soil fungus that has the ability to remove nitrogen and phosphorus and clear B0D and COD regulations, has low sludge generation, and is effective against high-concentration sewage, and can respond to changes in concentration and various conditions. Attention is being paid to the method of utilizing the method.

[0004] It is impossible to put bacteria-bearing soil into sewage because it becomes sludge. Therefore, the conventional utilization of soil bacteria is to form a bacteria-bearing soil layer at a predetermined position in a septic tank. The method was carried out by bringing sewage into contact with the soil layer containing bacteria. (For example, Japanese Patent Publication No.
No. 42756)

[0005]

The above-mentioned contact method using soil bacteria has a problem that the equipment is large and it is difficult to obtain an installation space. Therefore, there is a need to develop a highly efficient sewage treatment apparatus using soil bacteria. And it was.

[Means for Solving the Problems]

[0006] In order to solve the above-mentioned problems, the present invention provides a method for retaining bacteria in a rotating body (for example, see Japanese Patent Application Laid-Open No. 8-19787 according to the present applicant's invention) used in a conventional activated sludge method. In order to hold the soil, the bacteria holding soil was held by a soil holding core material formed in a three-dimensional network of a required shape made of a corrosion resistant material, and held on the soil holding core material by a permeable bag material also made of a corrosion resistant material. Wrap the soil holding bacteria,
Furthermore, the outer periphery of the permeable bag is surrounded by a shape holding member formed of a coarse mesh made of a corrosion-resistant material to form a circular plate, a disk, or a cylinder. A rotary contact body that can be incorporated into a sewage treatment device is to be formed. In this way, a rotary contact sewage treatment apparatus having a high purification ability utilizing soil bacteria is obtained.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to a sewage treatment apparatus for purifying sewage by immersing a part of a rotating body in sewage and rotating the sewage. A soil holding core made of a disc-shaped or disc-shaped or cylindrical shape by forming a conductive metal into a three-dimensional net, and a fine mesh or a porous non-woven fabric made of a synthetic resin or a corrosion-resistant metal is formed outside the soil holding core. Wrapped with a permeable bag material consisting of: furthermore, the outside of the permeable bag material is surrounded by a coarse mesh-like shape holding member made of synthetic resin or corrosion-resistant metal, and the inside of the permeable bag material is filled with bacteria-containing soil. A rotary contact type sewage treatment apparatus utilizing soil bacteria, comprising a rotary contact body formed into a circular plate shape, a disk shape, or a cylindrical shape mounted on a rotary shaft.

[0008]

Embodiments will be described with reference to the drawings.
FIG. 1 is a partially cutaway front view showing an example of the apparatus of the present invention.
FIG. 2 is a partially enlarged cross-sectional view of the rotating body shown in FIG. 1, and FIGS. 3, 4, and 5 are partially cutaway views of examples of rotating body constituent elements made of soil having different shapes of bacteria.

In the drawing, reference numeral 1 denotes a contact tank main body, 2 denotes a semi-cylindrical contact tank lid, in which a rotating shaft 3 is horizontally supported by bearings, and one end of the rotating shaft 3 protruding outside the tank. The electric motor 5 attached to the support 4 is directly connected.

As shown in FIG. 2, a plurality of circular plate-like contact members 7 shown in FIG. 3 are provided on the rotating shaft 3 between support plates 6 and 6 where a pair of plates are opposed to each other. And is supported by being prevented from falling off by means of drop-off preventing means (not shown), and is assembled in a single disk shape in multiple stages.

The circular plate-shaped rotary contact body 7 is made of a synthetic resin or a corrosion-resistant metal or a porous non-woven fabric around a soil holding core 7a having a three-dimensional net formed of a corrosion-resistant metal such as a synthetic resin or stainless steel. Wrapped in a permeable bag material 7b, and further provided on the outside thereof with a coarse net-like shape holding member 7 also made of a corrosion-resistant metal such as synthetic resin or stainless steel.
Although it is surrounded by c, the inside of the permeable bag material 7b is filled with the bacteria-containing soil 10.

In this manner, the soil 10 is held in a circular plate shape by the soil holding core 7a so as not to be biased, and the soil 10 is prevented from leaking out to the outside by the permeable bag 7b. And holding the shape so that the shape of the circular plate is not deformed by the shape holding member 7c.

FIG. 4 shows a disk-shaped rotary contact member 8 which is another embodiment of the rotary contact member. The disk-shaped rotary contact member 7 is formed in a disk shape. Is a disk-shaped soil comprising a soil holding core material 8a, a permeable bag material 8b, and a shape holding member 8c filled with bacteria-containing soil 10 in the same manner as the discoid rotary contact body 7. It can be considered that a plurality of the disc-shaped rotary contact bodies 7 are collected and integrated into a disc shape.

In order to assemble the disk-shaped rotary contact members 8 on the rotating shaft 3 as shown in FIG. 1, another support plate (not shown) is provided between the disk-shaped rotary contact members 8. The rotary shaft 3 is inserted into the central shaft through hole 8d with the shaft interposed therebetween for assembly. Therefore, when one or a small number of the assembled components are to be replaced due to damage or the like, it is necessary to disassemble the entire device, remove the replacement from the rotating shaft 3 and replace it with a new one, which is a large-scale operation. Although there is a problem in the point, there is an advantage that the whole structure is much simpler and can be manufactured at a lower cost than that of the circular plate-shaped rotary contact body 7.

FIG. 5 shows a cylindrical rotary contact body 9 as still another embodiment of the rotary contact body, which is composed of a soil holding core material 9a, a permeable bag material 9b, and a shape holding member 9c. The shape is filled with the soil 10 containing bacteria, and it can be considered that a plurality of the disk-shaped rotary contact members 8 are stacked to form an integral cylinder.

In the example shown in FIG. 5, three cylindrical rotary contact members 9 are shown. However, the number of the rotary contact members 9 is arbitrary. Do it. In the case of this cylindrical type, it is strong and difficult to break because it is large alone, and it is characterized by a large amount of soil bacteria.However, it is not possible to activate soil bacteria sufficiently because the area exposed to the atmosphere is small. There's a problem.

The present invention makes it possible to realize a rotary contact type sewage treatment apparatus using the bacteria-containing soil 10 as described above. Naturally, various aerobic and anaerobic bacteria inhabit the sewage. These fungi purify sewage by the conventional activated sludge method, and it is naturally possible to put these fungi into sewage, and a synergistic effect with the purification action by soil bacteria is obtained. is there.

[0018]

The present invention is embodied in the form described above and has the following effects.

Since the soil containing bacteria is made of a corrosion-resistant metal such as synthetic resin or stainless steel as a three-dimensional net having a desired shape, the soil is held by a core material having a desired shape such as a circular plate, a disk, or a cylinder. In addition, the shape can be maintained without the bacteria-bearing soil being distorted or deformed during rotation.

The bacteria-bearing soil held by the soil holding core is surrounded by a porous permeable bag made of a corrosion-resistant material, so that the soil does not leak to the outside, and has water permeability and ventilation. It has good properties and can satisfy the oxidizing, reducing, and decomposing effects of soil bacteria.

Each of the disc-shaped, disc-shaped, and cylindrical-shaped rotary contact bodies is surrounded on the outside by a strong coarse mesh-like shape holding member made of a corrosion-resistant material. Shape can be maintained.

By the sewage purification action of soil bacteria, nitrogen and phosphorus, which cannot be removed by conventional fungi inhabiting water, can be eliminated, thereby clearing the COD and BOD laws and regulations.

By obtaining a synergistic effect with the conventional fungi living in water, the action of purifying sewage can be dramatically improved.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an example of a rotary contact type sewage treatment apparatus using soil bacteria of the present invention.

FIG. 2 is a partially enlarged sectional view of the rotating body of FIG.

FIG. 3 is a partially cutaway perspective view showing an example of a circular plate-shaped rotary contact body used in the present invention.

FIG. 4 is a partially cutaway perspective view showing an example of a disk-shaped rotary contact body used in the present invention.

FIG. 5 is a partially cutaway perspective view showing an example of a cylindrical rotary contact body used in the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Contact tank main body 2 Contact tank lid 3 Rotation axis 4 Support stand 5 Electric motor 6 Support plate 7 Disc-shaped rotary contact body 7a Soil holding core material 7b Transmissive bag material 7c Shape holding member 8 Disk-shaped rotary contact body 8a Soil holding Core material 8b Permeable bag material 8c Shape holding member 8d Shaft through hole 9 Cylindrical rotating contact body 9a Soil holding core material 9b Permeable bag material 9c Shape holding member 9d Shaft through hole 10 Bacterial soil

Claims (1)

[Claims] In a sewage treatment apparatus for purifying sewage by immersing a part of a rotating body in sewage and rotating the sewage, a synthetic resin or a corrosion-resistant metal for keeping bacteria-bearing soil in a required shape is formed into a three-dimensional net. A permeable bag material composed of a disc-shaped or disc-shaped or cylindrical soil-retaining core material, and the outside of the soil-retaining core material is made of a synthetic resin or corrosion-resistant metal fine mesh or porous nonwoven fabric. Wrap, and further surround the outside of the permeable bag material with a coarse mesh-shaped shape holding member made of synthetic resin or corrosion-resistant metal, and fill the inside of the permeable bag material with bacteria-bearing soil to form a circular plate or A rotary contact type sewage treatment apparatus utilizing soil bacteria, wherein a rotary contact body formed into a disk shape or a cylindrical shape is mounted on a rotary shaft.