JP3042023U - River contact oxidation treatment tank and river contact oxidation treatment equipment - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] A plurality of arrays are arranged from upstream to downstream on a foundation formed by digging down a riverbed, and an aeration device is not required due to a siphon phenomenon in which a water flow meanders vertically.
In addition, BOD components and SS in water are effectively adsorbed and removed by aerobic bacteria without damaging the natural landscape of the river,
Purify the quality of river water. SOLUTION: This is a box-shaped tank provided with a bottom wall 11 and a peripheral wall 12 rising from the periphery of the bottom wall, arranged on a foundation dug down a river bed 30, and having an open upper surface kept at the same level as the river bed. The body 10 and the inside of the tank are arranged in a direction obstructing the flow of the river.
And a partition wall 14 having an upper end protruding upward from the open upper surface of the tank body to form a water stop portion 15, wherein the partition wall 14 is partitioned into an upstream chamber 10 a and a downstream chamber 10 b which can be filled with water. A water passage 17 that connects the upstream chamber 10a and the downstream chamber 10b between the bottom wall 11 of the tank body 10 and the lower end of the partition wall 14.
Is provided.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a catalytic oxidation treatment tank for aerobically purifying the water quality of river water and reducing BOD, SS, and the like, and a catalytic oxidation treatment apparatus using the treatment tank.

[0002]

[Prior art]

 It is a square box with a bottom wall, and a large number of concrete treatment tanks with water passage windows opened on the two side walls facing upstream and downstream, respectively, so that the water passage windows face upstream and downstream of the river. , Lining in accordance with the width and length of the river bed, filling the inside of each lined treatment tank with contact material such as gravel and crushed stone, and through the water passage window facing upstream of the side wall of each treatment tank The water flowing into the tank is treated with aerobic bacteria that attach to the contact material and propagate, and flow out through the water passage facing the downstream side. A catalytic oxidation treatment device for reducing S and the like to purify is conventionally known.

[0003]

[Problems to be solved by the device]

 In the above-mentioned known processing apparatus, water is forced to pass through the inside of each of the processing tanks arranged in line to contact the contact material, and therefore the upper surface of each processing tank must be covered with a lid. Therefore, it is necessary to use lids corresponding to the number of treatment tanks, and these lids impair the natural landscape of the river. In addition, aerobic bacteria that attach to the contact material and propagate and cannot absorb outside air with the lid that closes the upper surface of the treatment tank, and lose their activity.Therefore, an aerator is placed upstream of the treatment tanks that are lined up. However, this aeration device must increase the amount of dissolved oxygen in the water that flows through the treatment tank to maintain the activity of aerobic bacteria that adhere to the contact material and propagate, which is in combination with the use of the lid. Installation cost increases. In addition, when cleaning the contact material, such as when the contact material is clogged or reaches the adsorption limit, the lid must be removed and the contact material must be taken out from the inside of the processing tank. After filling the inside of the processing tank with the contact material, it is necessary to cover the upper surface of the processing tank again with the lid, which is a great deal of work. Furthermore, since a rectangular box-shaped treatment tank with a bottom wall must be provided with water passage windows on the side walls facing upstream and downstream, the formwork for molding the treatment tank with concrete becomes complicated. , Productivity is poor.

[0004]

[Means for Solving the Problems]

 The present invention was developed for the purpose of solving the above-mentioned problems, and the treatment tank for catalytic oxidation of a river according to claim 1 comprises a bottom wall and a peripheral wall standing upright from the periphery of the bottom wall. A box-shaped tank body that is arranged on a foundation where the riverbed is dug down and whose open upper surface is kept at the same level as the riverbed, and inside the tank body that is arranged in the direction that blocks the flow of the river. The inside of the chamber is divided into an upstream chamber and a downstream chamber that can be filled with the contact material against the flow of the river, and the upper end projects upward from the open upper surface of the tank to form a water stop. It is characterized in that it comprises a partition wall, and a water passage is provided between the bottom wall of the tank body and the lower end of the partition wall to connect the upstream chamber and the downstream chamber. The river catalytic oxidation treatment device according to claim 3 is disposed inside the tank body, which is a box-shaped tank body having an open upper surface composed of a bottom wall and a peripheral wall standing upright from the periphery of the bottom wall. The inside of the tank body is divided into two chambers, and at the same time, the upper end projects upward from the open upper surface of the tank body to form a water blocking wall, and the bottom wall of the tank body and the partition wall. A large number of treatment tanks with a water passage that connects the two chambers inside the tank with the lower wall of the wall against the bottom of the wall are installed on the foundation where the riverbed is dug down. The upper surface of the body is kept at the same level as the river bed, and the water blocking part of the partition wall protruding from the upper surface of the tank block the flow of the river, so that one of the two chambers is located upstream and the other is located downstream. In addition, the contact material is filled inside the two chambers that are divided by the dividing wall of each treatment tank that is arranged in line, according to the width and length of the bed. To.

[0005]

[Embodiment of the invention]

 Among the surrounding walls standing around the bottom wall of the treatment tank arranged on the foundation where the riverbed is dug down, the wall that is parallel to the river flow is made higher than the other walls to guide water flow. It is preferable to make a part. In addition, the contact materials to be filled in the two chambers (upstream chamber and downstream chamber) inside the tank divided by the partition wall are housed in mesh bags, etc. It is preferable that the whole mesh bag can be pulled out of the room for filling or cleaning.

[0006]

【Example】

 In each of the illustrated embodiments, 10 is a tank body of a processing tank having an open top surface, which has a bottom wall 11 and a peripheral wall 12 standing upright from the periphery of the bottom wall, and is made of reinforced concrete. The cross-sectional area inside the tank body is slightly reduced from the open top surface to the bottom wall for the sake of molding, and is tapered.

On the inner wall portions of the peripheral wall 12 facing each other, vertical grooves 13, 13 are provided so as to face each other at a position dividing the inside of the tank body into two. Both sides of the partition wall 14 are fitted into the facing grooves 13 and 13 from above to drop the partition wall, and the partition wall 14 allows the inside of the tank body to be separated into two chambers (upstream chamber and downstream chamber) 10a and 10b. Divide into The upper end of the partition wall projects upward from the open upper surface of the tank body to form a water stop portion 15. The partition wall 14 may be made of concrete containing reinforcing steel, but may also be made of thick wooden board or synthetic resin board.

Then, as shown by arrows in FIGS. 1C, 2B, and 3B, the so-called siphon phenomenon in which the water flow descending from the upstream chamber 10a is increased in the downstream chamber 10 is treated. In order to generate it in the tank, a water passage portion 17 that connects the chambers 10a and 10b is provided between the bottom wall 12 of the tank body and the lower end of the partition wall 14.

The two chambers 10a and 10b are filled with a contact material 18, respectively. Gravel, crushed stone, charcoal, and fibers can be used as contact materials, but pumice mixed in shirasu, which is widely distributed in the mainland of Kagoshima, is also a suitable material. Pumice stone has a large surface area due to its high porosity, and it is suitable for breeding aerobic bacteria due to its irregular shape.Because it is lightweight, it is easy to pull it out of the room for filling and cleaning it. Because you can do it. If charcoal obtained by carbonizing thinned wood, construction waste, etc. is used as the contact material, the same effect as pumice stone and the ease of work can be obtained, and it also contributes to resource saving.

The contact material is divided into one that fills the lower part of the room and one that fills the upper part. The material that fills the lower part is wrapped with a palm or vinyl net 19, and the one that fills the upper part is a corrosion-resistant coated iron net. Wrap it in 20. As a result, the weight of the contact material in the upper part wrapped with the iron mesh prevents the contact material in the lower part and the contact material wrapped with the vinyl net from falling off or being washed away. Of course, the entire contact material to be filled in each chamber may be wrapped with one vinyl net or a corrosion-resistant coated iron net. When the above pumice stone is used as the contact material, if pumice, pebbles, crushed stone, etc. are placed on the pumice stone and wrapped, the pumice stone can be prevented from rising.

FIG. 1 shows an embodiment of a treatment tank having a square body with a side of 1 m and a depth of 1 m and a square shape in plan view. It is divided into two by the partition wall 14 dropped into 13, 13 to form two chambers (upstream chamber and downstream chamber) 10a, 10b. The water blocking portion 15 of the partition wall 14 projecting upward from the upper surface of the tank body has ears 16, 16 that bulge to the left and right, and these ears receive the water on the upper surface of the peripheral wall of the tank body in this state. The lower end of the partition wall comes into contact with the bottom wall 11 of the tank body. The partition wall 14 has a central leg 14 ′ having a downward length of about 30 cm and a width of 20 cm at the center of the lower end thereof, and a water passage portion 17 is provided on both sides of the central leg 14.

However, the water passage portion 17 is not provided in the partition wall 14, but the bottom wall 11 of the tank body with which the lower end of the partition wall 14 contacts as shown in the embodiment of FIG. The water passage portion 17 may be provided below the partition wall.

Further, as shown in the embodiment of FIG. 3, the downward length of the partition wall 14 is shortened so that the left and right ears 16 and 16 of the water blocking part are received on the upper surface of the peripheral wall 12 of the tank body. In this state, the lower end of the partition wall may be separated upward from the bottom wall 11 of the tank body to serve as the water passage portion 17 formed between the lower end of the partition wall and the upper surface of the bottom wall.

In any case, when the ears 16 and 16 are provided on the left and right of the water stop and the ears are received on the upper surface of the peripheral wall 12 of the tank body, the ears 16 and 16 and the peripheral wall 12 are provided. It is possible to increase the height of the upper end of the water blocking portion or increase the cross-sectional area of the water passing portion 17 by sandwiching a suitable inclusion such as a plate piece between the upper surface and the upper surface of the water blocking portion. The height of the water stop portion 15 protruding from the open upper surface of the tank body is about 10 to 20 cm at a normal depth of water flowing on the river bed.

Further, as shown in the embodiment of FIG. 4, among the peripheral walls of the tank body, walls 12a, 12a parallel to the flow of the river having grooves 13, 13 facing each other for dropping the partition wall 14 are provided. The height may be made higher than that of the other walls 12b, 12b, and the raised portions may be used as the water guiding portions 21, 1. By making the upper ends of the water flow guiding parts 21, 21 and the upper end of the water blocking part 15 of the partition wall 14 at the same level, the ears 16, 16 provided on the left and right of the water blocking part 15 of the partition wall are unnecessary. . When the heights of the wall portions 12a, 12a parallel to the flow of the river are increased to provide the water flow guiding portions 21, 21 in this way, the water flowing on the riverbed is flowed between the water flow guiding portions 21, 21 from the upstream chamber 10a. When it collides with the water stopping part 15, it does not overflow and descends in the upstream chamber to come into contact with the contact material 18 in the chamber, and then the bottom wall of the tank body and the lower end of the partition wall 14 It descends through the water passage portion 17 provided therebetween and rises in the downstream chamber 10b while being in contact with the contact material 18, and flows down between the water passage guide portions 21 and 21 from above the downstream chamber. As a result, the water flow of the river can be rectified by the water flow guiding units 21 and 21 (see FIG. 7).

Although the tank body 10 of the treatment tank of each embodiment shown in FIGS. 1 to 4 has a square planar shape, it may have a rectangular planar shape or a regular hexagonal honeycomb shape as shown in FIG. Good. In the case of this honeycomb shape, the tank body 10A having a trapezoidal planar shape may be used together as necessary. In this case as well, the height of the wall portions 12a, 12a parallel to the water flow is made higher than the other wall portions to form the water flow guiding portions 21 and 21, and the upper end thereof and the upper end of the water blocking portion 15 of the partition wall are made the same. You may make it a level and have a rectification effect.

The size and depth of the tank body of the processing tank are arbitrary, but it is preferable that the processing tank has a weight (about 1.5 t) that can be hung and installed by a small truck crane. When the tank body is formed, the nuts 22 welded to the reinforcing bars are embedded and fixed on the upper surface of the peripheral wall 12, for example, the four corners when the tank body is formed, and the eyebolts 23 are screwed into the nuts after the formation. It is preferable to stand and use this eyebolt 23 to hang up and hang down. After installation, remove the eyebolt 23 and fill the nut 22 with mortar, caulking agent, etc. to prevent corrosion.

Furthermore, when natural stones are embedded in the upper surface of the water blocking portion 15 of the partition wall, the upper surface of the peripheral wall 12 of the tank body, and the upper surface of the water flow guiding portion 21, and when they are installed on the riverbed. It is preferable to keep it in harmony with the surrounding nature.

In order to form a contact oxidation treatment device for a river by arranging a large number of the above-mentioned treatment tanks in a row, the river bed 30 is dug in the middle, and the foundation 31 is made with cut gravel or leveled concrete on the dug bottom. Form. The depth of the upper surface of the foundation 31 from the riverbed is such that when the treatment tank is installed on the upper surface of the foundation, the water cutoff portion 16 at the upper part of the division wall and the water flow guidance when the water flow guidance section 21 is provided. The part is defined so as to project upward from the river bed 30.

When the gradient α from the upstream to the downstream of the riverbed 30 is small, the upper surface of the foundation 31 may be an inclined surface corresponding to the gradient as shown in FIG. 6 (A). When the slope is large, the upper surface of the foundation 31 is formed in a step shape or a tiered step shape that descends downward by one step as shown in FIG. 6 (B). If necessary, waterproof sheet piles 32 are driven into the upstream and downstream ends of the foundation 31, and when the length of the foundation from the upstream to the downstream direction (front and rear) is long, the waterproof sheet piles are also in the middle. 34 is driven in to increase the permeation flow path length to reduce water leakage and prevent the foundation ground from becoming hollow.

After the foundation 31 is formed in this manner, one treatment tank is placed on the foundation so that the upstream chamber 10a faces the upstream and the downstream chamber 10b faces the downstream, and is installed by unloading with a truck crane or the like. According to the length, they are arranged in one row or a plurality of rows (three rows in FIGS. 7 and 8). At that time, a corrosion-resistant elasturite is sandwiched between the treatment tanks adjacent to each other in the width direction and the length direction of the foundation, or a caulking material is used to seal the treatment tanks with each other to form a seal 35. It is preferable to prevent water from entering the gap. Then, the contact material 18 is filled inside the upstream chamber 10a and the downstream chamber 10b of each processing tank. FIGS. 6, 7 and 8 show an example of the case where the treatment tanks having the water flow guiding portions 21 and 21 of FIG. 4 are arranged, but of course, the treatment tanks of FIGS. Good.

The number of processing tanks arranged in a line from the upstream to the downstream is determined according to the pollution level of the river. If the pollution is large, increase the number, and if the pollution is small, decrease it. To match. The space between the left and right slopes 36, 36 of the river and the left and right side parts 37, 37 of the foundation are covered with covering parts 38, 38 such as gabions, gabbro, and cast concrete walls. , The entire amount of water flowing from upstream to downstream on the riverbed should flow down over the array of treatment tanks.

As a result, as shown by the arrows in FIGS. 6A and 6B, the water in the upstream chamber 10a is sequentially arranged from the water located upstream of the treatment tanks of each row to the water located downstream thereof. While flowing downward in the chamber while coming into contact with the contact material 18, while flowing through the water passage portion 17 and coming into contact with the contact material, flowing upward in the downstream chamber 10b and then flowing into the upstream chamber of the downstream processing tank, BOD components and SS are adsorbed and removed by the aerobic bacteria that adhere to the contact material and propagate when they come into contact with the contact material in 10a and 10b. Therefore, the treated water with reduced BOD concentration and SS is discharged to the riverbed from the downstream chamber of the treatment tank located on the most downstream side of each row.

[0024]

[Effect of the invention]

 The contact oxidation treatment tank for rivers according to the present invention divides the inside of the box into an upstream chamber and a downstream chamber with a box-shaped tank body having an open upper surface, and an upper portion protruding from the upper surface of the tank body. It becomes a water part, and the lower end consists of a partition wall that forms a water passage between it and the bottom wall of the tank body.Since it is not necessary to open a water passage window on the surrounding wall of the tank body, it is easy. It can be easily molded from concrete using a structural formwork. Therefore, productivity is extremely high.

Further, a contact-type oxidation treatment device can be obtained by arranging a large number of the treatment tanks on a foundation dug in the middle of the riverbed so that the water blocking portion blocks the water flow. According to this contact-type oxidation treatment device, water flows downward from inside of the treatment tank of each row to the one located downstream of the treatment tank while sequentially contacting the contact material 18 in the upstream chamber, While flowing through the water passage part and contacting the contact material, it flows into the upstream chamber of the processing tank on the downstream side while repeating the siphon phenomenon of upward flow in the downstream chamber, and contacts when contacting the contact material in the upstream chamber and the downstream chamber. BOD components and SS are adsorbed and removed by the aerobic bacteria that adhere to the material and propagate and are purified. In particular, since the running water flows through the inside of each treatment tank by the siphon phenomenon while coming into contact with the contact material, the length or time during which the running water contacts the contact material allows the running water to flow straight through the tank to form the contact material. Compared with the conventional contact type, the projected area is about twice as large, so the removal efficiency of BOD components and SS is increased, and river water can be effectively purified. Therefore, the treated water with a reduced BOD concentration and SS is discharged from the downstream chamber of the treatment tank located on the most downstream side of each row onto the riverbed. Since the upper surface of each treatment tank is open, aerobic bacteria adhering to the contact material take in outside air and enhance the activity.Therefore, it is not necessary to install an aerator upstream and the upper surface of the treatment tank is Since no cover is used, it can be installed at low cost, and the contact material for cleaning can be easily taken out and refilled, and the natural landscape of the river is not damaged.

[Brief description of the drawings]

FIG. 1A is a plan view of a first embodiment of a processing tank, and FIG.
FIG. 4A is a cross-sectional view taken along line BB of (A), and FIG. 4C is a cross-sectional view taken along line CC of (B).

FIG. 2A is a sectional view similar to FIG. 1B of a second embodiment of the processing tank, and FIG. 2B is a sectional view taken along the line BB of FIG.

FIG. 3A is a sectional view similar to FIG. 1B of a third embodiment of the processing tank, and FIG. 3B is a sectional view taken along the line BB of FIG. 3A.

FIG. 4 is a perspective view of a fourth embodiment of the processing tank.

FIG. 5 is a plan view of another embodiment of the processing tank.

FIG. 6A is a cross-sectional view of a contact-type oxidation treatment apparatus in which treatment tanks are arranged on the foundation of a gentle slope having a gentle downward slope toward the downstream side, and FIG. It is sectional drawing of the contact-type oxidation processing apparatus which arranged the processing tank on the step | stage of a shape foundation.

FIG. 7 is a plan view of the contact oxidation treatment apparatus.

FIG. 8 is an enlarged sectional view taken along line VIII-VIII in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Tank body of treatment tank 10a Upstream chamber in tank body 10b Downstream chamber in tank body 11 Bottom wall of tank body 12 Peripheral wall of tank body 13 Groove 14 Partition wall 15 Water stop part of partition wall 16 Ear of water stop part REFERENCE SIGNS LIST 17 water passage part 18 contact material 19 net wrapping contact material 20 iron net wrapping contact material 21 water conduction guide part 22 nut 23 eye bolt 30 riverbed 31 foundation 32 water stop sheet pile 34 intermediate water stop sheet pile 35 seal 36 river slope 37 Foundation side 38 Coating

Claims (4)

[Utility model registration claims] 1. A box-shaped tank body having a bottom wall and a peripheral wall rising from the periphery of the bottom wall, the box-shaped tank body being arranged on a foundation in which a riverbed is dug down, and having an open upper surface kept at the same level as the riverbed. The inside of the tank body is arranged in a direction obstructing the flow of the river, and the inside of the tank body is divided into an upstream chamber and a downstream chamber that can be filled with a contact material with respect to the flow of the river, and the upper end has A partition wall protruding upward from the open upper surface of the tank body and serving as a water blocking portion, and communicating the upstream chamber and the downstream chamber between a bottom wall of the tank body and a lower end of the partition wall. A treatment tank for contact oxidation of rivers, characterized by having a water passage section. 2. The processing tank for contact-type oxidation of river according to claim 1, wherein:
A treatment tank for contact oxidation of rivers, characterized in that the height of the wall parallel to the flow of the river is higher than the other walls and is used as a flow guiding part. 3. A box-shaped tank body having an open top surface comprising a bottom wall and a peripheral wall standing upright from the periphery of the bottom wall, and the inside of the tank body arranged in the tank body into two chambers. A partition wall having an upper end protruding upward from an open upper surface of the tank body to form a water stop portion, and a partition wall between the bottom wall of the tank body and the lower end of the partition wall. A large number of treatment tanks provided with water passages connecting the two chambers inside the tank body separated by walls were placed on a foundation dug down in the riverbed, and the upper surface of the tank body was kept at the same level as the riverbed. The water stop of the partition wall protruding from the upper surface of the tank blocks the flow of the river, and the two chambers are arranged according to the width and length of the riverbed so that one of the two chambers is located upstream and the other is located downstream. A contact oxidation treatment apparatus for rivers, wherein a contact material is filled in two chambers partitioned by partition walls of each treatment tank arranged in a row. 4. The river contact oxidation treatment apparatus according to claim 3, wherein, of the peripheral walls rising from the periphery of the bottom wall of each treatment tank arranged on the foundation, a wall parallel to the flow of the river. A contact oxidation apparatus for rivers, characterized in that the height of the section is higher than the other wall sections and the section is a water flow guide section.