JP2002018461A - Contact material for facility for cleaning river water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a contact material for a facility for cleaning river water which can propagate microorganisms for cleaning healthfully throughout the year in the contact aerator of the facility, does not need for replacement even when a water temperature is changed, and can be produced easily and inexpensively. SOLUTION: A partition 2 is installed in a netted bag 1, the first filling chamber 3 or the second filling chamber 4 is formed on each of both sides of the partition 2, numbers of cylindrical fillers 5 are packed randomly in the first filling chamber 3, and numbers of spherical fillers 6 are packed in the second filling chamber 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contact material used in a purification facility for purifying microorganisms by bypassing polluted river water.

[0002]

2. Description of the Related Art In a local city where the development of sewerage systems is delayed, many of the domestic wastewater is discharged directly to rivers without being treated. The environment is getting worse.

[0003] In order to purify such polluted river water, a method of directly purifying the river by purifying a purifying material, a method of purifying the polluted river water by bypassing a part of the polluted river water, introducing the purified water into the purification facility, There is a method of returning to the river, and the method is appropriately selected and adopted in consideration of the scale of the river and the degree of pollution. Of these, purification methods that bypass and purify in purification facilities include:
There are microbial treatment and coagulation-sedimentation treatment with chemicals, but many employ microbial treatment.

[0004] An example of this microbial treatment will be described. First, the polluted river water taken in is subjected to removal of sediment and large suspended matter in an anaerobic filter bed tank of a purification facility, and organic matter in small suspended matter is inhabited on the filter bed. Degraded by anaerobic microorganisms. The polluted river water is then introduced into a contact aeration tank, where the organic matter therein is decomposed by aerobic microorganisms that adhere to the contact material and inhabit. Here, the microorganisms repeatedly adhere and separate in the contact aeration tank, and a part of the microorganism is sent to the aerobic filter tank in the next process together with the river water to be treated as a suspended substance.
In the process of passing through the filter medium in the tank, it is removed by adhesion and coagulation, and the river water to be treated is returned to the river as transparent treated water.

In such a facility for purifying microorganisms in polluted river water, generally, since the amount of treated water is large, the residence time in the contact aeration tank needs to be as short as possible. In such a state, it is important to select a contact material that can be attached to a large unit and can be kept inhabited.

[0006] The temperature of river water changes with the seasons. Needless to say, the temperature in summer becomes high and the temperature in winter becomes low.
The microflora that controls the purification treatment in the contact aeration tank also changes. That is, when the water temperature in the summer is high, the adhesive force is weak, the bacteria that are easy to be eaten by metazoans, and fast-growing bacteria become the priority microflora, and when the water temperature in the winter is low, the adhesive force is strong, and Filamentous fungi with a low growth rate, which are difficult to be eaten and are likely to cause blockage, become the priority microflora.

[0007]

From the above observations, the present inventor has determined that efficient microbial treatment is necessary.
In summer and winter, treatment with different types of contact materials that are compatible with the preferred microflora at each time will result in better activity conditions for the microorganism at the corresponding time and the best treatment at each time. It was found that a result could be obtained.

Thus, in order to cope with the change of the microflora in the contact aeration tank which changes according to the season, the contact material set in the contact aeration tank is replaced with a material suitable for each season. Thus, a stable processing result can be obtained throughout the year, but there is a problem in that the replacement work takes too much time and money.

Therefore, the present invention, once introduced, does not require replacement even when the season changes, and the microorganisms responsible for purification in the contact aeration tank of the river water purification facility inhabit and proliferate in a healthy state throughout the year. It is an object of the present invention to provide a contact material for a river water purification facility that can be made to work.

[0010]

According to one aspect of the present invention, the interior of a container through which liquid can enter and exit is divided into a first filling chamber and a second filling chamber, and the first filling chamber has a space therein. River water formed by filling a large number of one or both of a space holding member having a space or a space forming member capable of forming a space between adjacent ones, and filling the second filling chamber with a large number of porous members. Is a contact material for purification facilities.

A second aspect of the present invention is the contact material for river water purification facilities according to the first aspect of the present invention, wherein the space holding member is a cylindrical body having a circular or square end surface and a smooth surface. It is formed into a cylindrical body having a diameter of 30 to 40 mm and a length of 40 to 60 mm.

A third aspect of the present invention is the contact material for river water purification facilities according to the first aspect of the present invention, wherein the space forming member is an irregular-shaped member having one or more bulging portions and having a smooth surface. , Formed in an irregularly shaped member having a diameter of 30 mm to 60 mm.

A fourth aspect of the present invention is the contact material for river water purification facilities according to the first, second or third aspect of the present invention, wherein the porous member is
The surface is a porous inorganic fired body having a diameter of 30
It is constituted by an inorganic fired body of about 60 mm.

[0014]

DETAILED DESCRIPTION OF THE INVENTION The present invention is a contact material for a river water purification facility used in a contact aeration tank of a purification facility for purifying microorganisms by bypassing polluted river water. This means that the interior of the container in which liquid can freely enter and exit is partitioned to provide two chambers, a first filling chamber and a second filling chamber, and members corresponding to the first filling chamber and the second filling chamber, respectively. To form a contact material. In the first filling chamber, a space holding member that holds a space by itself or a space that can form a space between adjacent ones so that microorganisms that take precedence when river water is at a low temperature can preferably inhabit and proliferate. One or both of the formed members are randomly filled in large numbers to form a contact material for winter. Also, the second filling chamber is filled with a large number of porous members having a large number of fine pores so as to be able to preferably inhabit and proliferate microorganisms which are prioritized when the river water is at a high temperature, and used as a contact material for summer. .

[0015] As the container, various containers that allow the liquid to freely enter and exit can be used. For example,
A net-like bag, a tubular body having a large number of small holes, or an elliptical sphere having a large number of small holes.
Examples thereof include those having a diameter of 400 mm and a thickness or a short diameter of about 100 to 300 mm, or a spherical body having a large number of small holes and having a diameter of 100 to 400 mm. By adopting such a container that allows the liquid to enter and exit freely, the contact between the polluted river water and the contact material used in the container is improved, and efficient microbial treatment can be performed. In addition, the polluted river water does not form stagnation and becomes partially anaerobic, and does not generate odor.

The mesh bag employed as the container is made of synthetic fibers such as nylon, polyester or polypropylene and has a mesh woven to about 30 mm or more. The tubular body, the spherical body and the elliptical spherical body are used. The body is preferably formed of a plastic such as polyvinyl chloride, polyester, or polyurethane, and has a surface on which a large number of holes of about 30 mm or more are opened. The aperture or diameter is preferably as large as possible so as not to cause blockage, but it goes without saying that the size of the member to be filled in the container is such that the member does not protrude from the mesh or the hole. It is also necessary and therefore should be slightly smaller than the size of the component to be filled.
If the size of the member to be filled is about 30 mm in diameter, it may be set slightly smaller than this, for example, 29 mm.

A partition is provided near the center of the container to divide it into two chambers, and a first filling chamber and a second filling chamber are formed. The partition member is preferably formed using the same material as that used for the container.

The first filling chamber is provided with a space holding member or a mutually adjacent space holding member so that microorganisms that grow preferentially when the river water is at a low temperature can preferably inhabit and proliferate. A large number of both or one of the space forming members that can form a space therebetween are randomly filled to generate a large number of spaces inside.

The space holding member is, for example, a cylindrical body having a circular or polygonal end face and a diameter of 30 mm.
A cylindrical body having a length of about 40 mm and a length of about 40 to 60 mm can be employed. As the material, a plastic such as polyvinyl chloride, polyester, or polyurethane which can form a smooth surface is preferably used. As the space forming member, for example, an irregularly shaped member having one or more bulging portions and formed so that the maximum diameter thereof is 30 to 60 mm can be adopted. Similar to the space holding member, a plastic such as polyvinyl chloride, polyester, or polyurethane that can form a smooth surface is preferably used for the space forming member.

By configuring the first filling chamber as described above, when the contact material for river water purification facility of the present invention is charged into the contact aeration tank and used, the first filling chamber is used. Since a large space is ensured and it is difficult to cause blockage, it is preferable for the inhabitation of filamentous fungi which grow preferentially when the water temperature in winter is low. As a result, the quality of the treated water in winter becomes stable.

On the other hand, microorganisms which grow preferentially when river water is at a high temperature are preferably inhabited in the second filling chamber.
For example, a large number of porous members having a large number of fine holes are filled so as to be able to grow. As the porous member, a porous inorganic fired body is suitable, such as a porous ceramic sphere or an elliptical sphere, and the diameter (short diameter) thereof.
Is set to about 30 to 60 mm.

By configuring the second filling chamber as described above, when the contact material for river water purification facility of the present invention is charged into the contact aeration tank and used, the filled porous member is used. Is literally porous, so bacteria that grow preferentially when the water temperature in summer is high can easily enter the micropores and attach to them, making it harder for predators such as daphnia and conch to prey on. This prevents the colonies from dispersing, which is preferable for bacteria. In addition, as a result, the quality of the treated water in the summer becomes stable, and fine suspended substances are adsorbed by the many small pores, so that the turbidity of the treated water is eliminated.

As described above, the contact material for a river water purification facility according to the present invention is constituted by dividing one container into two rooms and disposing members having completely different characteristics. is there. By arranging a large number of the contact materials for the river water purification facility at random in the contact aeration tank, various microorganisms in charge of purification that inhabit and proliferate according to the temperature of the water can be used by the microorganisms themselves. By making a judgment, it moves to the first or second filling chamber, and adheres to any of the contact materials that are likely to inhabit so that a healthy colony is formed.

In this way, in the contact aeration tank, microorganisms active in the summer and microorganisms active in the winter can be kept in a healthy state in separate filling rooms, respectively. Therefore, regardless of seasonal fluctuations,
Polluted river water can be efficiently purified in a stable state throughout the year. In addition, the contact material for river water purification facilities of the present invention has both a contact material suitable for summer and a contact material suitable for winter, so there is no need to replace the contact material between seasons. , And it does not require much labor or cost.

Furthermore, the contact material for river water purification facilities of the present invention has a simple structure and is made of a readily available material, so that it can be manufactured at low cost.

The contact material for a river water purification facility according to the present invention does not usually cause clogging easily, but river water that is muddy due to a typhoon or heavy rain falls in the contact aeration tank. If it is introduced in a large amount, it may cause some clogging. However, in such a case, the ability of the contact material can be easily restored by washing it by back washing.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, two embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic perspective view of a contact material for a river water purification facility of Example 1, FIG. 2 is a schematic perspective view of a tubular filler used for a contact material for a river water purification facility of Example 1, and FIG. FIG. 4 is a schematic perspective view of a spherical filler used as a contact material for river water purification facilities of Example 1, and FIG. 4 is a partially cutaway schematic perspective view of the contact material for river water purification facilities of Example 2.

<Embodiment 1> As shown in FIG.
A partition 2 made of a similar polypropylene mesh material is provided at the center in the longitudinal direction of a polypropylene mesh bag (container) 1 having a width of 0 mm and a width of 200 mm, and a first filling chamber 3 and a second filling chamber 4 are provided on both sides thereof. And are formed. The mesh size of the mesh bag 1 was set to 30 mm × 30 mm. The first filling chamber 3 is randomly filled with a large number of cylindrical fillers 5 made of polyvinyl chloride having a smooth surface as shown in FIG. A large number of the spherical fillers 6 made of porous ceramics as shown in the figure were filled to prepare the contact material for river water purification facilities of Example 1.

The cylindrical filler 5 has a diameter of 35 mm and a length of 55 mm.
The one whose diameter was set to 35 mm was adopted.

The amount of the contact material for the river water purification facility of Example 1 prepared in this manner is the same as the amount of the contact material normally used in the contact aeration tank of the river water purification facility installed by bypassing a certain river. It was thrown in to the extent and used for use. These inputs were performed randomly without any particular orientation.

<Embodiment 2> As shown in FIG.
A tubular body (container) 11 made of polyvinyl chloride having a large number of through-holes 7 having a diameter of 32 mm at both ends and a peripheral side having a thickness of 0 mm and a thickness of 160 mm is used. The partition 22 is made of the above plastic material, and the first filling chamber 33 and the second filling chamber 44 are formed on both sides thereof. The first filling chamber 33 is randomly filled with a large number of cylindrical fillers 5 made of polyvinyl chloride having a smooth surface as shown in FIG. 2, and the second filling chamber 44 is shown in FIG. A large number of such spherical fillers 6 were filled to prepare the contact material for river water purification facilities of Example 2.

The contact material for a river water purification facility of the second embodiment prepared as described above is placed in a contact aeration tank of a river water purification facility installed by bypassing another certain river. The same amount as the amount was charged and used. These inputs were performed randomly without any particular orientation.

Next, Table 1 shows the results of using the contact material for river water purification facilities according to Examples 1 and 2 for a period of one year and six months. The test items observed during this period were as follows, and the records were collected by visual and microscopic observation. <Test Items> 1. Status of microflora in summer 2. State of treated water in summer 3. Contact material condition in summer 4. Winter microflora status 5. Condition of treated water in winter Condition of contact material in winter

[0034]

[Table 1]

As can be seen from the results of Examples 1 and 2 shown in Table 1 above, the contact material for river water purification facilities of the Example is extremely resistant to the inhabitation of microorganisms in both summer and winter. It was confirmed that the treated water was good, and the treated water was clear without turbidity.
In addition, there was no situation in which the net-like bag 1 of the first embodiment and the tubular body 11 of the second embodiment were blocked, and the good condition was always maintained.

[0036]

According to the first aspect of the present invention, a contact material for river water purification facilities according to the present invention employs a container capable of entering and exiting a liquid. Therefore, each filling material (contact material) to be filled therein is used. ) And polluted river water are improved, and efficient microbial treatment can be performed, and the polluted river water does not form stagnation therein. Therefore, there is no occurrence of an anaerobic state occurring in such a part, and no generation of offensive odor due to this.

Further, one container is divided into two filling chambers, each of which has a completely different characteristic (contact material), that is, each filling chamber is filled to form a large number of large spaces. Since the filler (contact material) to be filled and the filler (contact material) having a large number of micropores are arranged, microorganisms that multiply preferentially in each season according to the water temperature of the river water are microorganisms At their discretion, they adhere to the fillers (contact materials) that are likely to inhabit and form healthy colonies. More specifically, a filamentous fungus that grows preferentially in winter adheres to a filler (contact material) that fills each filling chamber to create a large number of large spaces, forms a colony, and forms a large number of micropores. Bacteria which grow preferentially in the summer season adhere to the packing material (contact material) provided with, and colonies are formed. Therefore, according to one of the contact materials for river water purification facilities of the present invention, since there is an element capable of forming a colony by attaching microorganisms that grow preferentially in each season,
Polluted river water is stable throughout the year and can be efficiently treated with microorganisms.

As described above, a filler (contact material) suitable for microorganisms that grow preferentially in summer and a filler (contact material) suitable for microorganisms that grow preferentially in winter coexist. So, for example, between the seasons, filler (contact material)
There is no need to replace the material with a filler (contact material) suitable for the next season, and therefore, no effort or cost is required.

Furthermore, since the structure is simple and made of a readily available material, it can be manufactured at low cost.

According to the contact material for river water purification facilities of the second aspect of the present invention, as the space holding member, a cylindrical member having a circular or polygonal end surface and having a smooth surface has a caliber. 30 to 40 mm, adopting a cylindrical body molded to a length of 40 to 60 mm, the first filling chamber of the container, since a large number of them are randomly filled, the surface is less likely to cause blockage, It becomes a contact material that allows healthy growth of filamentous fungi that grow preferentially in winter.
As a result, the quality of the treated water in winter becomes stable.

According to the third contact material for river water purification facilities of the present invention, as the space forming member, an irregular shape having a diameter of 30 to 60 mm and having at least one bulging portion is made of plastic having a smooth surface. The first filling chamber of the container is molded into a member, and a large number of the first filling chambers are randomly filled, so that a large number of spaces are generated therein, and the same effect as the second aspect of the present invention can be obtained.

According to the contact material for river water purification facility of 4 of the present invention, the porous member is formed of an inorganic fired body having a large number of fine pores on its surface, and is formed into a diameter of 30 to 60 mm. The second filling chamber of the container is filled with a large number of the bacteria, so that bacteria that grow preferentially in summer are attached thereto,
It becomes a contact material that can be healthy inhabited. As a result, the treated water quality in the summer becomes stable,
The fine suspended substances are adsorbed by the large number of micropores, and the turbidity of the treated water is eliminated.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a contact material for a river water purification facility according to a first embodiment.

FIG. 2 is a schematic perspective view of a cylindrical filler used as a contact material for a river water purification facility in Example 1.

FIG. 3 is a schematic perspective view of a spherical filler used as a contact material for a river water purification facility in Example 1.

FIG. 4 is a partially cutaway schematic perspective view of a contact material for a river water purification facility according to a second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Net-like bag (container) 2,22 Partition 3,33 1st filling chamber 4,44 2nd filling chamber 5 Cylindrical filling material 6 Spherical filling material 7 Through hole 11 Tubular body (Container)

Claims (4)

[Claims] 1. The inside of a container through which a liquid can enter and exit is a first
The first filling chamber is divided into a filling chamber and a second filling chamber, and the first filling chamber includes a large number of one or both of a space holding member having a space in itself and a space forming member capable of forming a space between adjacent ones. A contact material for a river water purification facility, wherein the second filling chamber is filled with a plurality of porous members. 2. The space holding member is a cylindrical body having a circular or square end surface and a smooth surface, and has a diameter of 30 to 4 mm.
The contact material for river water purification facilities according to claim 1, wherein the contact material is formed into a tubular body having a length of 0 mm and a length of 40 to 60 mm. 3. The space forming member is an irregularly shaped member having one or more bulges and having a smooth surface, and has a diameter of 30.
The contact material for a river water purification facility according to claim 1, wherein the contact material is formed as an irregularly shaped member having a size of mm to 60 mm. 4. The river water purification facility according to claim 1, wherein the porous member is an inorganic fired body having a porous surface and a diameter of 30 to 60 mm. Contact material.