JP3443725B2 - Purification zone, purification device, and sewage purification method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a purification zone, a purification device, and a purification method for purifying wastewater such as industrial wastewater, water and sewage, and river water.

[0002]

2. Description of the Related Art As a general sprinkler type filter bed apparatus, a mass of filter media is deposited in layers in a tank to attach microorganisms, and sewage is sprayed from the top of the tank, and treated water that has permeated and flowed out of the tank. It is known that the structure is taken out.

[0003]

DISCLOSURE OF THE INVENTION In the above-mentioned conventional sprinkler type filter bed apparatus, when the filter media blocks are deposited in layers, only the filter media blocks at the surface layer are in sufficient contact with the air, so that an anaerobic condition occurs and The ability to decompose pollutant components will be reduced. Further, the microbial bodies that have proliferated cause the voids between the filter media to be clogged and become anaerobic, so that the permeation of sewage is significantly deteriorated.

The present invention has been made to solve the above problems, and an object thereof is to bring the entire wastewater into sufficient contact with air and to exhibit a highly efficient pollutant decomposition treatment capacity. A purification zone, a purification device, and a method for purifying sewage.

[0005]

According to the present invention, in a purification member having a function of purifying wastewater, a columnar porous columnar body and a water-conducting sheet having a porous structure for connecting between the horizontally oriented porous columnar bodies. And a constricted portion that exposes the dropped water to the air is formed between the porous columns. Further, the present invention is the purification zone as described above, wherein the cross-sectional shape of the porous columnar body is rectangular. Further, the present invention is the purification zone as described above, wherein the water-conducting sheet has water permeability.
Further, the present invention is the purification zone, characterized in that, in any of the above-mentioned purification zones, the water-conducting sheet alternately forms a water-permeable range and a water-impermeable range.

According to the present invention, in any one of the above-mentioned purification zones, a purification apparatus is provided in which the purification zones are arranged in the longitudinal direction, and sewage is flowed down from above the purification zones to purify it.
The purification apparatus is characterized in that sewage sprinkling means is located above the purification zone, and sewage is made to flow down from the sewage sprinkling means over the entire length of the purification zone. Further, the present invention is the above-mentioned purification device, wherein a purification zone is provided upright. Further, the present invention is the above-mentioned purification device, wherein the wastewater sprinkling means is a container for storing the wastewater, and a slit for sprinkling the wastewater into the purification zone is formed on a side surface of the container, the purification device. . Further, according to the present invention, in the above-described purifying apparatus, the sewage supply means is a lid body having a through hole above the sewage sprinkling means, and the lid body is provided with a downward inclination toward the through hole. It is a purifying device. Furthermore, the present invention is the purification device, characterized in that, in any of the above-mentioned purification devices, means for supplying air to the purification zone is provided.

The present invention uses any one of the above-mentioned purification zones, sprinkles sewage from the upper part of the purification zone, and while the sewage flows down the purification zone, the sewage is brought into contact with air to purify the sewage. It is a method for purifying sewage, which is characterized in that sewage is purified while flowing down the belt. Further, the present invention is the method for purifying sewage, characterized in that, in the above-described purification method, sewage flowing down the purification zone is caused to flow down through the water guide sheet in the constricted portion. The present invention is also the purification method described above, wherein the sewage flowing down the purification zone directly flows down from the perforated column to the perforated column at the constricted portion.

[0008]

Embodiment 1 of the present invention will be described below with reference to the drawings.

<B> Overall Configuration As shown in FIG. 1, the purification device 1 includes a tank 2 and a purification zone 3.
And a sewage sprinkling means 4, a sewage supply means 5, and an air supply means 6.

<B> Tank As shown in FIG. 1, the tank 2 is a hollow box, and the upper surface of the tank 2 can be freely opened and closed, so that a purification zone 3 and a sewage sprinkling means 4 described later can be arranged. . Further, it may be considered that the tank 2 is provided with a dirty water supply means 5 and an air supply means 6 which will be described later. A discharge port 21 that can be opened and closed is formed near the bottom of the tank 2 in order to discharge the treated water that is purified wastewater from the inside of the tank 2.

<C> Purification Zone As shown in FIG. 2, the purification zone 3 is a member that enables purification by flowing sewage. As shown in FIG. 4, the purification zone 3 used in the purification device 1 of the present embodiment is arranged so as to face the side surface of the sewage sprinkling means 4 described later so that the sewage leaking from the sewage sprinkling means 4 flows down. Can be used. As shown in FIGS. 2 and 3, the purification zone 3 is configured by disposing a plurality of porous columnar bodies 32 on a water guide sheet 31. As the water-conducting sheet 31, for example, when the porous columnar body 32 is disposed and then erected and used, a known material having rigidity such as resin may be used,
When used by hanging, a soft known material such as woven cloth may be used. For the porous column 32, a porous biological carrier or the like having voids to which microorganisms for purifying sewage adhere is used. That is, as the porous columnar body 32, it is conceivable to use a sponge-like material such as non-woven fabric or polyurethane, or a water-retaining material such as ceramics.

As described above, when a sponge made of polyurethane is used as the porous column 32, it is desirable that the sponge has excellent water retention and flexibility. When a sponge filter medium is deposited in layers like a conventional sprinkler type filter bed device, it is inconvenient because it is crushed by a soft sponge and becomes in an anaerobic state. However, in the present invention, the porous columnar body 32 is replaced with a water guide sheet. The soft sponge can be used without being worried about being crushed because it is disposed on 31 and supported.

As shown in FIG. 2, the porous columnar body 32 is a columnar member which basically extends in the horizontal direction. The porous columnar body 32 is arranged to face the water-conducting sheet 31 in the horizontal direction on both sides of the water-conducting sheet 31. Arrange them side by side in a row. Perforated column 3
The cross-sectional shape of 2 (in the state of being arranged on the water guide sheet 31) can be various shapes such as a spherical shape, a cubic shape, and a shape in which the bottom surfaces of two triangles are combined (substantially abacus spherical shape). As shown in FIG. 3, the porous columnar bodies 33 are connected to each other so that the narrowed portions of the cross-sectional shape are opposed to each other so as to form a constricted portion. When flowing down to the body 32, by passing through this constricted portion, it is possible to make more contact with the air and enhance the ability of microorganisms to decompose and purify sewage. In addition to the above-described structure of the connecting portion, in each of the various porous columnar bodies 32, the connecting end faces are connected with some allowance to connect them, thereby further increasing contact between sewage and air, and thereby purifying It is also possible to increase the ability. The total length of the purification zone 3 is desired to be as long as possible in consideration of purification of sewage, but is basically set in consideration of the total length of the tank 2, and the sewage sprinkling means 4 and sewage supply means, which will be described later, are provided above the tank 2. It is conceivable that the height is set to leave a sufficient space for arranging 5. Further, it is considered that the purification zone 3 is prepared in advance as a single body according to the total length of the tank 2, or a plurality of purification zones are combined in the vertical direction so as to match with the total length of the tank 2.

<D> Sewage sprinkling means The sewage sprinkling means 4 is a box, and a plurality of slits 41 are formed on the side surface on which the purification zone 3 is arranged from a predetermined height above the bottom surface of the purifying zone 3. After the sewage has been collected to a predetermined height in 4, the sewage is allowed to overflow from each slit 41 so that a uniform amount of sewage can be supplied over the entire width of the purification zone 3. As a shape of the slit 41 formed in the dirty water sprinkling means 4, it goes without saying that a known shape other than the inverted triangle as shown in FIG. 4 can be adopted. Further, instead of the slit 41, for example, a known permeating material (not shown) may be arranged to supply a predetermined amount of sewage in the sewage sprinkling means 4 to the purification zone 3.

<E> Sewage Supplying Means The sewage supplying means 5 is means for supplying sewage to the sewage sprinkling means 4 located above the purification zone 3 arranged in the tank 2. As the sewage supply means 5, various known forms can be adopted. For example, as shown in FIG. 1, all sewage sprinklers 4 are connected by a distribution pipe 51 to supply sewage from outside the tank 2. It is conceivable that the sewage sprinkling means 4 can be directly pulled in by supplying the sewage water to the sewage sprinkling means 4. In addition to this, for example, as shown in FIG.
A lid 53 having a distribution structure is arranged on the upper surface of the tank 2,
It is conceivable to supply sewage from above with a sprinkler 54 or the like. At this time, a plurality of through holes 55 are formed in the lid 53 having the distribution structure in accordance with the arrangement position of the purification zone 3 arranged in the tank 2, and the sewage is evenly distributed in each of the through holes 55. The upper surface of the lid 53 is provided with an inclination so as to collect. As a result, sewage can be supplied to each purification zone 3 almost uniformly. In addition, when supplying the wastewater to the purification zone 3 from the lid 53, the purification zone 3 is not covered by the lid 53.
It is conceivable to suspend and arrange it just below the through hole 55 formed in the above.

<F> Air Supply Means The air supply means 6 is attached to the purification zone 3 by supplying fresh air into the tank 2 through the air outlet 61 formed at a predetermined position on the side surface of the tank 2. It is a means for further enhancing the purification efficiency of wastewater by activating the activity of microorganisms. A known device such as a compressor or a blower may be used as a device for sending out air. It is also conceivable to form an exhaust port (not shown) in the tank 2 in order to ensure a predetermined ventilation.
In this case, it may be possible to employ a deodorizing device (not shown) that prevents the offensive odor generated from the dirty water from leaking to the outside. Although the above-mentioned air supply means 6 has been described as a means for forcibly sending air into the tank 2, it is also possible to supply natural air simply by opening the blower opening 61.

[0017]

[Purification method] Hereinafter, a purification method for wastewater using the purification device of the present invention will be described.

<A> Supply of sewage to the purification zone The sewage to be purified is supplied to the sewage sprinkling means from an external supply pipe which is a sewage supply means provided above the tank. At this time, each sewage sprinkler is connected by a distribution pipe, and sewage is evenly supplied to each sewage sprinkler. The waste water supplied into the waste water sprinkling means leaks from a slit formed on the side surface of the container when a predetermined amount is accumulated.
The leaked sewage flows down evenly over the entire width of the purification zone arranged downward on the side of the sewage sprinkler.

<B> Purification process of sewage in the purification zone The sewage that has flowed into the purification zone flows down between a plurality of perforated columns that are sequentially arranged in the vertical direction of the water guide sheet. At this time, the sewage does not flow down all at once due to the shape of the porous columnar body, but slowly flows down while sequentially passing through each porous columnar body. The sewage is decomposed and purified by the microorganisms attached to the porous columns while flowing down between the porous columns. At this time, by supplying fresh air into the tank forcibly or naturally by the air supply means, microorganisms decompose the wastewater and
The purifying action can be activated. As a result, the sewage flows down each porous column of the purification zone, and while reaching the vicinity of the bottom end of the sewage, the sewage is purified from the sewage to the treated water and accumulates below the tank.

<C> Recovery of Treated Water Treated water is appropriately recovered from an outlet formed near the bottom of the tank. The recovered treated water can be returned to rivers or reused as recycled water.

[0021]

Since the present invention is as described above, the following effects can be obtained. <B> By adopting a purification zone using a porous column, it is possible to bring sewage and air into sufficient contact with each other, and thereby exhibit a high sewage purification property, so that the purification zone becomes anaerobic and It does not reduce the ability to decompose the pollutant components. In addition, the microbial bodies that have proliferated do not cause the anaerobic state by clogging the voids of the porous columnar body, and the permeation of sewage is not significantly deteriorated. <B> Since the purification zone has a structure in which porous columns are disposed on both sides of the water guide sheet, the purification zone can be easily installed in the purification device as compared with the conventional technique in which the filter media are arranged in layers. <C> Since the water guide sheet also serves as a support material when vertically arranging the porous columns, the sewage supplied from the upper part does not flow down as a short-circuit flow and flows down the microorganisms to purify the sewage. It is possible to efficiently flow down the arranged porous columnar body. <D> By forming a constricted portion at the connecting portion of the porous columnar members, it is possible to increase the air contact efficiency at the constricted portion of the porous columnar member, and it is possible to dramatically increase the treatment capacity of wastewater purification. <E> Since the porous columnar body is a columnar body extending in the horizontal direction, when the purification apparatus is scaled up, it can be easily dealt with by simply extending the lengthwise direction, for example. <F> Since the purification zone can be easily configured by merely disposing the porous columnar body as the columnar body on the water-conducting sheet, the manufacturing cost thereof can be kept low.

[Brief description of drawings]

FIG. 1 is an explanatory view of a purification device according to the present invention.

[Figure 2] Illustration of the purification zone

FIG. 3 Partial cross-sectional view of the purification zone

FIG. 4 is an explanatory diagram of a sewage sprinkler.

FIG. 5 is an explanatory diagram of a purification device that directly supplies wastewater to the purification zone.

─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Lalit Kumar Agrawar 1-16-14 Shibuya, Shibuya-ku, Tokyo Tokyu Construction Co., Ltd. (72) Inventor Hideki Harada 1-4-School Town, Nagaoka City, Niigata Prefecture 28 Nagaoka Housing 2-204 (72) Inventor Akiyoshi Ohashi 1769-1 Fukasawa-cho, Nagaoka City, Niigata 2-401 (56) References JP-A-52-1957 (JP, A) JP-A-48-92950 (JP) , A) JP-A-53-103656 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) C02F 3/04 C02F 3/10

Claims (11)

(57) [Claims] 1. A purifying member having a function of purifying sewage, comprising: a columnar porous columnar body; and a water-conducting sheet having a porous structure that connects between the horizontally oriented porous columnar bodies. A purification zone, characterized by forming a constricted part for exposing the dripping water to the air. 2. The purification zone according to claim 1, wherein the cross-sectional shape of the porous columnar body is rectangular. 3. The purification zone according to claim 1 or 2, wherein the water-conducting sheet has water permeability. 4. The purification zone according to any one of claims 1 to 3, wherein the water-conducting sheet has water-permeable areas and water-impermeable areas formed alternately. 5. A purification device according to any one of claims 1 to 4, wherein the purification zone is arranged in a vertical direction, and sewage flows down from above the purification zone for purification. A sewage sprinkler is located above the purification zone, and sewage is made to flow down from the sewage sprinkler over the entire length of the purification zone. 6. The purifying device according to claim 5,
A purification device, wherein the wastewater sprinkling means is a container for storing the wastewater, and a slit for spraying the wastewater into the purification zone is formed on a side surface of the container. 7. The purifying apparatus according to claim 5 or 6, wherein the sewage supply means is a lid body having a through hole above the sewage sprinkling means, and the lid body has a downward inclination toward the through hole. A purifying device characterized by being provided with. 8. The purifying device according to claim 5, further comprising means for supplying air to the purifying zone. 9. The purification zone according to claim 1, wherein the purification zone is sprinkled with sewage, and the sewage is brought into contact with air while the sewage flows down the purification zone. A method for purifying sewage, characterized in that sewage is purified while the sewage has finished flowing down the purification zone. 10. The purification method according to claim 9,
A method for purifying sewage, characterized in that sewage flowing down the purification zone is made to flow down through a water guide sheet in a constricted portion. 11. The purification method according to claim 9, wherein
A method for purifying sewage, characterized in that sewage flowing down the purification zone flows directly from the perforated column to the perforated column in the constricted portion.