JPH0123594Y2 - - Google Patents

Description

[Detailed description of the invention] "Purpose of the invention" The present invention is concerned with devising a sewage purification treatment mechanism, which enables efficient sewage purification treatment with relatively compact equipment, and significantly reduces operating costs. The present invention is designed to facilitate the assembly of a sewage purification treatment mechanism that can reduce the amount of water used, and to improve its durability.

Industrial applications.

A sewage purification mechanism using a rotating body.

Conventional technology.

There are two methods for treating urban sewage and various industrial wastewater:
Although there are chemical methods that use various chemicals, treatment methods that use microorganisms are advantageous in terms of operating costs and are becoming increasingly popular. In other words, treatment methods using microorganisms include the activated sludge method in which air is blown into the sewage in the treatment tank, the contact oxidation method in which a contact material is placed in the tank (soaked bed method), and the sprinkled bed method. A large number of relatively lightweight and strong disc bodies are attached to the rotating shaft, and the surface area of the entire disc body is
By immersing 40% of the disk and rotating it at low speed, the group of disks comes into contact with the air and the wastewater alternately, and the microorganisms attached to the surface of the group of disks can purify the wastewater. According to this, it is not necessary to blow air into the sewage inside the tank, there is no need for special water sprinkling, and there is no need to return sludge, making it the most energy-saving method, and a considerable number of treatment methods have already been used in Japan. It is being put into operation on site. However, even in the case of this advantageous rotating disk method, in the case of conventional rotating disks, the surface area per unit volume (m ³ ) is limited even if the disk bodies are arranged fairly closely together. Therefore, it is difficult to obtain efficient oxygen supply and the favorable oxidizing action of microorganisms associated with it. Although the above is for aerobic conditions, denitrification and accompanying methane fermentation can also be advantageously performed under anaerobic conditions by operating the rotating body under fully submerged conditions. It is known that this can be done, but in this case as well, the surface area per unit volume is limited in the case of a disk as described above.

Therefore, in order to eliminate the above-mentioned disadvantages, the inventors of the present invention have devised a method for air supply that is preferably achieved by using a slowly decomposing tissue formed by interlacing flexible linear materials as the rotating body, and furthermore, the microorganisms themselves He proposed that organic matter (BOD) and other pollutants in wastewater could be effectively oxidized and decomposed and purified (Utility Application No. 176,665, 1982). In other words, according to the prior art of the present inventors, for example, when operating in a 40% submerged system, microorganisms actively adhere to and multiply on the periphery of the fibrous material after approximately 20 days of operation, resulting in a decrease in its weight. As stated in the specification, the weight is five times the weight before operation, which reveals its excellent purification performance.

Problems to be Solved by the Invention However, since the prior application of the present inventors uses a slow-dissolving tissue made of linear material as mentioned above, it is difficult to Specifically, it is not easy to assemble the disc into the tank, resulting in a complicated and complicated structure, and there are disadvantages in that the mounting condition is not necessarily stable. That is, a stable mounting relationship must be able to withstand certain external forces, and it must be rigid. However, since the object in the above-mentioned structure is a flexible, slowly decomposing tissue, it is difficult to mount it rigidly, and therefore the mounting structure must be complicated. Moreover, as microorganisms propagate in this tissue as described above, its weight becomes extremely large as described above, and this causes problems that are difficult to predict in the case of factory-produced degrading tissue itself. . In other words, the fact that the weight of the material part is more than five times the weight of the manufactured material means that the manufactured material part has sufficient adhesive strength (i.e., separation resistance) between each fiber material.
Even if it were obtained, it would be required to withstand a separation force of five times or more, and this alone would inevitably leave some problems. Even if it is a tissue, it is not something that is woven or braided as thread, for example.
This is a loosely loosened structure in which fibers are simply intertwined, and the binding agent (binder) that is attached to such fibers by being removed or immersed condenses and tightens at the intersections between the fibers of the loosely loosened interwoven structure. Since the particles are only slightly attached to the particles, their weight increases as described above, separation force acts on them, and the possibility of separation and dissipation increases rapidly when rotational force acts on them in waste water. In particular, in the circumferential portion cut to form a predetermined shape, the length of the fibers is significantly shortened by cutting, and the number of junctions and intersections becomes large and small, resulting in resistance to separation force acting on such fibers. sexuality has been severely diminished,
When some of the fibers separate, the separation resistance of the fibers that were joined to them also decreases, and the fibers separate from the cut circumferential side part as described above and dissipate into the waste water, and the shape of the fibers also decreases. If the material collapses, sufficient durability cannot be expected.

``Structure of the invention'' Means for solving the problems The present invention was devised after consideration to solve the problems of the conventional and earlier applications as described above. In a device that purifies the sewage components by immersing it in water and rotating it to propagate microorganisms that have the ability to purify the sewage components,
A thermoplastic synthetic resin material is used for the flexible linear tissue material in a relaxed state and the intersection points are fastened to form the rotating body, and the peripheral side of the molded material plate and the assembly member made of the flexible linear tissue material are used. This sewage purification mechanism is characterized in that a circumferential portion of the insertion hole is a flat welded portion, and the rotating bodies are assembled to each other by an assembly member inserted into the insertion hole.

Effects According to the present invention as described above, the rotating body that is immersed in waste water and rotated is in a relaxed state and is formed of a flexible linear tissue material whose intersection points are fastened. Biochemical treatment methods using microorganisms, which are advantageous in terms of operating costs, can be carried out smoothly by ensuring adequate supply of wastewater and air, but thermoplastic synthetic fibers are not suitable for flexible linear tissue materials such as those mentioned above. In addition, since the peripheral side and the assembly member insertion hole portion of the unit body for forming the rotating body are made into flattened welded parts, the strength and rigidity of the flattened welded part can be effectively obtained, and the unit body can be improved. Facilitates handling and assembly. In addition, the compressed welded part as described above prevents the separation and dissipation of fiber materials in the part, and under the conditions of immersion in sewage and the increase in weight due to attached growth of microorganisms due to the operation. To provide a highly durable rotating body that maintains a predetermined shape for a long period of time.

Embodiment A specific embodiment of the present invention as described above will be explained with reference to the attached drawings. An example of the general structural relationship of the processing equipment is as shown in FIG. 3, and as described above. The wastewater is pumped out from the wastewater receiving tank, which is designed to receive and temporarily store wastewater, and after coarse substances are removed by screens installed in separate tanks, it is received in a raw water storage tank, etc. A processing tank 5 using a disc-shaped rotating member 10 is provided, and the processing tank 5
The water is discharged through an aeration tank, sedimentation tank, treated water tank, disinfection tank, etc. as necessary.

However, as shown in FIG. 1, the raw material plate 1 for forming the above-mentioned rotating body 10 is made of thermoplastic synthetic fibers alone or mixed with other fibers as appropriate and cut into a predetermined length. Synthetic resin latex is sprayed onto a material that has been bent into a curled shape and mixed and arranged in a slowly loosened state, and the latex is aggregated at the intersections of the fibers, and heat-treated. A material plate 1 is used, which is a plate-shaped molded body that is fastened and hardened to a predetermined thickness in a slowly loosening state with a space maintained between the edges. The part of the assembly member insertion hole 1b is used as the compressed welded part 15, 15a, that is, by partially compressing and heating the thermoplastic synthetic fiber as described above, the thermoplastic synthetic fiber is partially compressed and heated. The fibers are welded and compacted to form a compacted welded portion 15 which is rigid and resembles a simple synthetic resin molded plate. Since it is preferable that the above-mentioned rotating body has a circular shape, it is advantageous to form the material plate 1 as a plurality of fan-shaped units.

The material plate 1 as described above is assembled using the cylindrical spacing member 2 to the compressed weld portion 15a formed in the insertion hole 1b portion. That is, as shown in FIG. 4, this spacing member 2 has flanges 22 at both ends of a cylindrical portion 21, and such flanges 22
A male threaded portion 23 and a female threaded portion 24 are formed respectively, and during assembly, the female threaded portion 24 is inserted into the insertion hole 1b for one of the two spacing members 2, 2 located on both sides of the material plate 1. When inserted into the spacer, insert the male threaded portion 23 of the other spacing member into the female threaded portion 24.
By screwing in, the pressed welded portion 15a is sandwiched between the flanges 22, 22 of both members 2, 2. As shown in FIG. 1, a plurality of the above-mentioned insertion holes 1b are provided for each material plate 1.
As shown in FIG. 1, spacing members 2 are used in each of these insertion holes 1b, and the flanges 22 are set in the compressed welded portions 15a. In this way, when the spacing members 2 are sequentially screwed together in the axial direction and the material plate 1 is inserted and supported between the flanges 22, 22 of the spacing members 2, the dimensions and rigidity of the spacing member 2, which is a rigid body, are changed. The spacing in the thickness direction of each material plate 1, 1 is automatically determined based on the thickness dimension of the pressed welded portion 15a, and the material plates 1, 1 are positioned at a constant spacing.

Therefore, the spacing member 2 installed in this way
If the tightening rod 12 is inserted between the end plates 6 through the inner hole as shown in FIG. As shown in FIG. 4, the parts can be assembled as shown in FIG. 4, and the straight pressed welded portions 15 on both sides of each blank plate 1 are also substantially aligned.

The treatment tank 5 has a wastewater introduction pipe 7 and a treated liquid discharge pipe 8.
The end plate 6 and the rotary plate 10 are supported on the machine frame 4 by a shaft rod 9, and a driving mechanism 1 such as a motor is provided.
Rotationally driven by 4. The processing tank 5 is appropriately covered with a cover 5a.

Of course, the entire fibrous material of the material plate 1 may be made of thermoplastic fibers, and the above-described compressed and welded portions 15 and 15a can be appropriately formed. However, in some cases, it is clear that a suitable blend of thermoplastic fibers may be sufficient, and if at least 30% or more is blended, the compressed welds 15, 15a can be similarly formed by compression heating as described above. be able to. That is, in this case, even if the other blended fibers are not melted, the thermoplastic fibers can be welded to form a flattened welded portion. Furthermore, not only fiber materials but also film materials, sheet materials, etc. cut to a suitable width of 3 mm or less are sufficient, and the cross section thereof does not matter. That is, linear materials including narrow tape-like materials other than so-called fibrous materials can be widely used.

``Effect of the invention'' According to the invention as explained above, a thermoplastic synthetic resin material is used as a flexible linear textured material in a relaxed state and the intersection points are fastened, and the peripheral side of the unit material by the textured material is And since the circumferential side of the assembly member insertion hole is made into a compressed welded part, it is possible to accurately prevent the separation and escape of the linear tissue material at the circumferential side, prevent deformation, etc., and prevent considerable damage during use. It is possible to use it for a long time without being damaged or deformed even when the weight increases, and as a result of this, preferable strength or rigidity for the unit material is obtained on the peripheral side and the assembly part, and as a result, it is a slowly decomposing structure. However, it has the effect of significantly simplifying the necessary parts and structure for assembling this object as a rotating body so that it can operate while partially immersed in sewage water, and reducing the number of assembly steps. This is a highly effective idea.

[Brief explanation of the drawing]

The drawings show embodiments of the invention,
Fig. 1 is an oblique view of the material plate according to the present invention, Fig. 2 is a side view of the assembled state, Fig. 3 is an oblique view of the spacing member, and Fig. 4 is an example of the processing mechanism according to the present invention. It is a slope view. However, in these drawings, 1 is the material board, 1
b is the insertion hole, 2 is the spacing member, 5 is the processing tank, 1
0 is a rotating body, 15 and 15a are flat welded parts, 21 is a cylindrical part, 22 is a flange part, 23 is a male thread part, and 24 is a female thread part.

Claims (1)

[Scope of utility model registration request] A plurality of rotating bodies are immersed in sewage water and rotated to purify the sewage components by breeding microorganisms having the ability to purify the sewage components, in which the rotating bodies are in a relaxed state and at the intersection points. A thermoplastic synthetic resin material is used for the flexible linear tissue material to which the flexible linear tissue material is fastened, and the peripheral side of the molded material plate made of the flexible linear tissue material and the peripheral side of the assembly member insertion hole are used as the compression welding part. A sewage purification mechanism characterized in that the rotating bodies are assembled to each other by an assembly member inserted into the insertion hole.