JPH08108191A - Polluted water purifying member as well as method and apparatus for purifying polluted water using the member - Google Patents

Abstract

PURPOSE: To efficiently purify polluted water within a short time by a one-stage technique by forming a polluted water purifying member from a hollow member with a predetermined diameter having a large number of drilled holes having predetermined opening parts on the outer surface thereof and setting the compression strength thereof to a predetermined value. CONSTITUTION: A purifying member 1 is formed into a hollow member having an almost spherical outer shape. This hollow member is usually formed by connecting semispheric elements A, B having connection parts C connectable each other by screwing or unevenness and the diameter thereof is set to about 70-150mm. Two or more drilled holes 2 having opening parts on the outer surface of the hollow member are provided to the hollow member so as to pierce the hollow member up to the internal space D thereof. When the purifying member 1 is set to this diameter, a predetermined space can be ensured between the purifying members 1 when a purifying area is packed with the purifying members and the flow of aerating air becomes smooth. The compression strength of the hollow member is set to 50kg/cm or more to prevent the collapse of the purifying member 1 caused by the wt. of the packed purifying members 1 from above.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to purification of polluted water, and more particularly to a purification member for aerobically treating polluted water and at the same time anaerobically treating and capturing suspended fine solid matter, and polluted water using the same. The present invention relates to a purification method and a purification device.

As a method for purifying various waste water or polluted water such as river water contaminated with them, various methods have been proposed and implemented. The conventional method for purifying polluted water is
Chemically treats pollutants in polluted water to render them harmless, and
The method can be roughly divided into two: a chemical treatment method of precipitating and separating, and a biological treatment method of biologically detoxifying with a biofilm or activated sludge and precipitating and separating and removing in a floc form. Most of the biological treatments in recent years are carried out by immobilizing microorganisms on a predetermined carrier to form a biofilm, and a method of alternately setting an aerobic state and an anaerobic state, for example, JP-A-63-63 In Japanese Patent Laid-Open No. 310696, a hollow carrier is proposed which simultaneously forms an aerobic state and an anaerobic state. Further, aerobic and anaerobic treatments using a high surface area honeycomb-shaped hollow cylinder have also been proposed. Furthermore, in recent years, in order to purify contaminated river water, an inter-gravel oxidation method for purifying river water using a riverbed has been proposed and already implemented as the above biological treatment method. This inter-gravel catalytic oxidation method forms a gravel layer by effectively utilizing the gravel such as gravel of a river, and processes river water in the gravel layer by BOD (biochemical oxygen demand), SS ( The amount of suspended solids) is greatly reduced, and it is attracting attention as a method for purifying polluted water such as contaminated river water. The above-mentioned conventional polluted water purification method requires two-step treatments of a reaction treatment system and a precipitation / separation treatment system in both chemical and biological treatments. On the other hand, the inventor, in particular, for the purpose of efficiently carrying out the above gravel-catalyzed catalytic oxidation method to improve the practicality,
As a result of studying the improved technology, a separation material that forms a purification treatment system completely different from the conventional treatment of polluted water was developed, and the separation material and the polluted water using the same were previously disclosed in JP-A-3-221110. Proposed treatment. Furthermore, from the behavior of suspended fine solids in polluted water as a circulating fluid, from the separation phenomenon that separates and removes the fine solids in a form that effectively utilizes fluid energy, a suitable separation method and member has been proposed. No. 5-160435).

[0003]

The aerobic treatment with a biofilm on the surface of the carrier according to the above-mentioned conventional method requires a long residence time of several hours or more to purify it so as to satisfy a predetermined standard value. It was Furthermore, the pores provided for communication with the outside of the hollow carrier are 0.05 to 1 mm, and it is not easy for the polluted water to flow into and out of the hollow interior, and it is more suitable for anaerobic treatment in the space inside the carrier. It took a long time. On the other hand, the above-mentioned proposed separating member and separating method efficiently separates the suspended fine solids in the liquid fluid, and at the same time, the organic substances among the supplemented fine solids are anaerobically treated by the internal voids and become liquid. It is an excellent treatment method that can be solubilized and can purify polluted water in one step. However, in the method proposed above, the separated organic solid matter is anaerobically processed in the voids formed inside the separating member, so that the processing time generally tends to take a long time. Further, the aerobic treatment of the surface was not so different from the conventional method, and it took a long time to clean it. In view of the conventional purification treatment of polluted water that requires a long time, the inventor has conducted earnest studies and completed the present invention for the purpose of shortening the purification treatment time and further improving the purification rate. The present invention can be said to be the culmination of the conventional treatment of contaminated water such as contaminated water. Particularly, by using a predetermined member, the method for purification can be purified in a single step, and the contaminated water can be purified extremely efficiently, and in a short time. It can be purified with.

[0004]

According to the present invention, there is provided a hollow body having an equivalent diameter of about 70 to 150 mm and having an outer surface of about 5 mm.
Two or more drilled holes having an opening of -50 mm are formed,
Also provided is a polluted water purification member having a compressive strength of 50 kg / cm ² or more. In addition, a plurality of hollow bodies having an equivalent diameter of about 30 to 70 mm, in which two or more drilled holes having openings of about 5 to 30 mm are formed on the outer surface, are connected and fixed to each other via a reinforcing material to obtain 50 kg / cm ^2. There is provided a polluted water purification member having the above-described compressive strength. The hollow body of the present invention is preferably formed into a substantially spherical body. Further, the open area ratio of the perforated holes in the outer surface area of these hollow bodies is preferably about 5 to 40%. The equivalent diameter of the hollow body in the present invention means the diameter of the hollow body having a volume substantially equal to the volume of the spherical hollow body. The opening is the longest part of a straight line connecting any two points in the space surrounding the opening.

Further, according to the present invention, polluted water is provided in a purification area formed by filling and arranging the above-mentioned polluted water purifying member, which has an inflow section and an outflow section in which rectifying members are respectively arranged. Introduced from the inflow section and evenly flowing between the polluted water purification members to the outflow section, and ejecting oxygen-containing gas in the form of fine bubbles from the bottom of the purification zone to the entire purification zone in a short period of time. A method for purifying polluted water, which is characterized by purifying.

Further, the present invention is an uncovered or covered device for treating polluted water, which is provided with an inflow portion of the contaminated water, an outflow portion of the treated water, and rectifying members provided in the inflow portion and the outflow portion, respectively. A purification zone which is arranged between the inflow section and the outflow section and which is filled with the polluted water purification member, and an air diffuser arranged at a predetermined interval at the bottom of the purification zone. To provide a purification device for polluted water.

[0007]

The polluted water purifying member of the present invention is constructed as described above and is provided in a purifying device for circulating and purifying polluted water to act as a biofilm-forming body and a resistor in the polluted water circulation. To do. That is, in the polluted water purification member of the present invention, while a biofilm is formed on the surface thereof, the production of a boundary film layer is suppressed in the periphery thereof as described later, so that the aerobic treatment is carried out quickly and efficiently. can do. That is, the polluted water purification member having a large equivalent diameter is filled in the purification zone while having spaces between each other, and oxygen-containing gas such as air for aeration (hereinafter, simply referred to as air) is fine bubbles in the entire purification zone. Since the air is evenly diffused in, the growth of the boundary film layer on the surface of each purification member is prevented. Therefore, on the surface of the polluted water purifying member, a sufficient amount of air or the like is constantly supplied, so that the aerobic treatment can smoothly proceed. Further, in the purifying member having a small equivalent diameter, the aerobic treatment can be similarly smoothly performed on the surface of each purifying member by connecting and fixing the purifying members with a predetermined reinforcing material having a space therebetween. Therefore, in the purification treatment of the present invention, the residence time of the treated polluted water in the purification area is
For example, a conventional purification treatment that requires a residence time of about 60 to 90 minutes can be sufficiently purified in a short time of about 5 to 40 minutes to satisfy a predetermined outflow standard.

On the other hand, the purification member of the present invention, when viewed microscopically, becomes a resistor in the polluted water flow region, reduces the flow velocity near the purification member and forms a laminar flow region around the purification member, and at the same time, the flow velocity in the polluted water flow. Make a difference. Therefore, the fine solid matter floating in the polluted water is moved in the direction of the basin having a slow flow velocity while rotating due to the generated flow velocity difference, and reaches the laminar flow region around the purification member. In addition, the suspended fine solids in the turbulent flow region are ejected in the laminar flow region direction by a random flow, and thus similarly reach the laminar flow region formed around the purification member. Further, in the purifying member of the present invention, two or more perforated holes having relatively large openings are formed in the outer surface of the hollow body so as to penetrate the outer peripheral wall, whereby the outside and the hollow inside are communicated with each other, The fine solids that have reached the laminar flow region around the purification member as described above are trapped in the openings and accumulated in the hollow interior, and are separated and removed by the previously proposed flow separation. The fine solid organic matter separated and removed and accumulated in the hollow is anaerobically treated and solubilized in the purification member hollow, and again discharged into the polluted water from the perforation hole.

The purifying member of the present invention comprises a predetermined hollow body alone or a plurality of hollow bodies which are connected and fixed together by a reinforcing material to obtain 50 kg.
Since it has a compressive strength of / cm ² or more, even when it is filled in the purifying device, it is not deformed or crushed due to its own weight, and the purification treatment can be smoothly performed for a long period of time. Even when the upper part of the purifying device is covered with earth and sand, etc., it has the above-mentioned compressive strength and is not broken. Further, the purifying device of the present invention is provided with a predetermined rectifying wall such as a wire mesh at the boundary with the purifying region at the inflow part and the outflow part, so that the contaminated water to be purified can be moved substantially horizontally in the purifying region. Therefore, the purification efficiency can be improved because the purification treatment can be performed evenly in the entire purification area. As described above, the polluted water purifying member of the present invention, and a method for purifying polluted water by filling and arranging the same, and an apparatus therefor are capable of separating and removing suspended fine solid matters in polluted water and simultaneously performing aerobic treatment and Anaerobic treatment can be performed to efficiently purify polluted water in a short time.

[0010]

Embodiments of the present invention will be described in more detail with reference to the drawings. However, the present invention is not limited to the following examples. FIG. 1 is an external view of an embodiment of the purification member of the present invention, and FIG. 2 is a vertical cross-sectional view thereof. 1 and 2, the purification member 1 is a hollow body having a substantially spherical outer shape, and normally, hemispheres A and B each having a coupling portion C that can be fitted by screwing or concavo-convex are produced.
It is preferable that the purifying member 1 is formed by fitting B and B together. Further, the purifying member 1 has a plurality of perforation holes 2 that have openings on the outer surface and penetrate to the hollow internal space D. The size of the purification member 1 is not particularly limited, but it is usually formed in a diameter range of about 70 to 150 mm. A sphere having a diameter within this range is preferable because a predetermined space is secured between the respective purification members when it is filled in the purification area, and aeration air or the like can be smoothly circulated in the purification process. The hole 2 may be formed with an opening of 5 to 50 mm, and its shape is not particularly limited. Usually, it is formed in a circular shape. The purifying members 1 are individually arranged in a purifying region for purifying polluted water. The purifying member 1 usually differs from the size of the purifying region, in particular, the depth thereof, but the purifying member usually comes from above. It is designed to have a compressive strength of about 50 kg / cm ² or more so as not to be crushed by its own weight. By having the compressive strength as described above, the shape of the hollow body can be sufficiently maintained even when it is weighted by, for example, embankment on the upper portion of the polluted water purifying apparatus, and it can be applied to a general purifying apparatus. The strength can be maintained by appropriately selecting the material and thickness of the purification member, and if necessary, for example, as shown in FIG. It may be passed over for reinforcement to maintain the required strength regardless of the material and thickness.

FIG. 3 is an explanatory view of another embodiment of the purifying member of the present invention. In FIG. 3, the purification member 10 is formed by connecting the hollow bodies 11, 11, 11 to each other by a reinforcing material 13. Each hollow body 11 usually has an equivalent diameter of about 30 to
It is formed into an approximately spherical shape with a diameter of 70 mm, and its surface is approximately 5 to 3
A plurality of drilled holes 12 having an opening of 0 mm are drilled as in the case of the hollow body 1 used alone. In addition, adjacent hollow bodies 11 do not contact each other, so that diffused bubbles can freely pass through the surface of each hollow body 11 in the diffusing treatment of air or the like in the purification area described later, for example,
They are arranged and connected so as to have a predetermined gap of 3 to 10 mm. The purification member 10 has the hollow body 11 as described above.
May be continuously and sequentially connected, but in consideration of workability of filling and arranging in the purification area, the maximum outer diameter is approximately 70 to 150, which is substantially the same as the equivalent diameter of the large purification member used alone.
mm is preferable. Usually, 3 to 6 hollow bodies 11
Are connected by the reinforcing material 13. Further, each hollow body 11 is usually formed to have a compressive strength of about 10 kg / cm ² or more, but the plurality of hollow bodies 11 are connected so as to support each other, and the purification member 10 as a whole has a pressure of 50 kg / cm ^2. cm ²
It is preferable to appropriately select the compressive strength of the hollow body, the connection shape, the gap width, the number of connections, the material of the reinforcing material, and the like so as to have the above compression strength.

The opening on the outer surface of the purifying member of the present invention is 5 to 50 mm in the case of the purifying member 1 in which hollow bodies having an equivalent diameter of 70 to 150 mm are individually used, while a plurality of small hollow bodies are used. In the case of the purification member 11 in which a plurality of are connected by a reinforcing material, the distance is 5 to 30 mm. When the opening of the perforation hole of the purification member exceeds 50 mm or 30 mm, a flow also occurs in the opening passage and the hollow interior, and the suspended fine solid matter cannot be trapped and accumulated in the hollow interior. On the other hand, when it is less than 5 mm, it is difficult for the fine solid matter trapped and accumulated in the hollow interior to be anaerobically decomposed and liquefied to flow out under its own weight. Further, in the present invention,
The outer peripheral surface of the purification member is subjected to aerobic treatment with a biofilm,
On the other hand, since the floating fine solids are captured in the opening and anaerobically treated inside the hollow, the ratio of the outer peripheral surface to the opening is appropriately selected depending on the conditions such as the degree of contamination of the water to be purified and the purification device. You can Generally, the open area ratio of the outer surface of the purification member is in the range of about 5-40%. Further, the through passage from the opening on the outer surface of the drilled hole 2 or 12 to the internal space D penetrating the outer peripheral wall portion may have the same size as the opening, or may be widened or narrowed toward the hollow inside. May be. Usually, it is drilled so as to reach the inside in a shape similar to that of the opening.

The hollow bodies 1 and 11 constituting the purifying member 1 or 10 are not particularly limited as long as the purifying member as a whole can secure the above-mentioned strength of 50 kg / cm ² . Generally, plastics such as polyvinyl chloride, polyethylene and polypropylene can be preferably used. Alternatively, the waste plastic may be reused, for example, the waste plastic may be crushed and subjected to a predetermined treatment, and then manufactured by joining molding or the like, and a predetermined hole may be provided and used. . Further, as the small hollow body 11, for example, a commercially available plastic golf practice ball with holes may be used, or those having similar specifications may be manufactured and used. In the hollow body 1 or 11 that forms the purification member of the present invention, it is easy and common to form the hollow internal space in conformity with the outer shape. It may be polygonal and the inside may be spherical. Further, the thickness of the outer peripheral wall is not particularly limited, and can be selected in consideration of strength and the like. Generally, the large hollow body 1 has a range of 2 to 10 mm, and the small hollow body 11 has a range of 1 mm.
It may be appropriately selected within a range of up to 5 mm. In addition, the reinforcing material that connects the small hollow bodies 11 with each other has a predetermined material, thickness, and the like depending on the size of the hollow bodies 11, the number of connected bodies, and the like.
It is appropriately selected so as to maintain the strength of 0 kg / cm ² .
Generally, various plastics can be used as well as the material of the hollow body.

Next, a polluted water purifying apparatus in which the purifying member is filled and arranged, and a purifying process thereof will be described. FIG.
FIG. 3 is a partial cross-sectional explanatory view of an embodiment of the purifying device of the present invention. In FIG. 4, the polluted water purification device 20 is a rectangular parallelepiped processing tank without a lid. The shape and size of the polluted water purifier are arbitrary and are usually formed in a rectangular parallelepiped shape. In addition, in FIG. 4, although there is no lid, an upper lid can be installed, and in the case of a large-scale purification facility, after the purification member is filled and arranged in the space as described below, soil is added to the upper portion. It can also be used for various facilities after arranging the ground. At least a pair of inflow water passages 21 and discharge water passages 22 are disposed in a predetermined outer peripheral portion of the polluted water purification device 20 so as to face each other, and a purification area S of the space portion is provided. The size of the purification area S is not particularly limited and can be appropriately selected according to the amount of polluted water to be purified, the treatment of the site where the purification device is installed, and the environmental conditions. For example, in the case of a small device, the width is about 1 to 2 m, the length is about 1 to 10 m, and the depth is about 1 m.
If it is a purification facility for large river polluted water that is formed to 2m,
The width is arbitrarily selected according to the amount of water, and the length is about 3 to 10 m,
It is formed to a depth of about 2 to 5 m.

The inflow water channel 21 is for introducing polluted water to be purified into the purification device, and the discharge water channel 22 is for collecting the purified water after purification and flowing out to a river or the like.
An air diffuser pipe 23 is arranged at a predetermined interval at a lower portion of the purification area S, usually a bottom portion, between the inflow water passage 21 and the discharge water passage 22.
As a result, the fine bubbles of the oxygen-containing gas such as air for aeration ejected from the air diffuser are made to rise almost in the entire purification area S. Further, an inflow water straightening wall 24 and an exhaust water straightening wall 25 are arranged on the side surfaces of the inflowing water channel 21 and the inflowing water channel 22 disposed in the purification area, respectively.
The rectifying walls 24 and 25 may be formed of wire mesh, concrete blocks, or the like so as to have a resistance portion. The polluted water passes through the inflow water straightening wall 24, passes through the discharge water straightening wall 25, and flows in the purification region S so as to move in parallel in a block unit, so that the purification efficiency can be improved. In the polluted water purifying apparatus 20 of the present invention, each of the purifying members 1 and 10 described above can be filled and arranged in the purifying area S individually or in a mixture. In this case, the purification member is filled so that the filling rate is 50 to 70%, that is, the porosity between the hollow bodies in the purification region is 50 to 30%. In addition, it is preferable to dispose between the hollow bodies 1 or 11 constituting each purification member so that fine air bubbles of the diffused gas for aeration from the diffuser pipe 23 can pass through. Further, when the purification members 1 and 10 are appropriately mixed and filled, it is preferable that bubbles can smoothly flow between the purification members 1. In addition, in FIG. 4, in order to illustrate the rise of the fine bubbles from the air diffuser holes 26 of the air diffuser 23, the filling state of the purification member 1 is partially omitted.

The air diffuser 23 arranged at the bottom of the purification zone S of the present invention is generally a perforated pipe having a large number of fine air diffuser holes 26 in a pipe body having a closed end as shown in FIG. Is used. Also. The cross-sectional shape of the tubular body can be arbitrarily selected such as polygonal or circular. The diameter of the tube may be arbitrary,
It is only necessary that the oxygen-containing gas for aeration such as air be circulated and can be ejected to the purification area S through the air diffuser holes 26. Usually, a circular tube having a size of about 5 to 10 cm can be used. In addition, fine air diffusion holes 26 formed in the air diffusion tube body 23.
As long as it is possible to eject the air of the aeration gas with fine bubbles,
The shape, arrangement, etc. are not particularly limited. For example, at a distance of about 0.5 to 1.5 cm on the entire circumferential surface of the tubular body, in a spiral or random shape in any direction, a diameter of about 0.3 to
It can be formed by forming a diffusion hole 26 of 2 cm.
Further, it is possible to use the porous tube having various kinds of fine pores and form the diffused holes 26 in the porous portion. The material of the air diffuser 23 is not particularly limited as long as it can maintain its shape or the like for a long period of time in the contaminated water that is purified by flowing through the purification area S without being deteriorated by corrosion or the like. Generally,
Using a polyvinyl chloride tube with a diameter of about 5 cm, the air diffuser 26
Can be used by perforating the entire peripheral surface at intervals of about 0.5 to 1 cm. The number and arrangement form of the air diffusers 23 provided at the bottom of the purification zone are arbitrary, and can be appropriately selected according to the installation and treatment conditions. Usually, the length of the polluted water flowing from the inflow water straightening wall 24 to the discharge water straightening wall 25 is substantially perpendicular to the entire width of the purification area S. The plurality of air diffusers 23 are substantially evenly spaced, typically about 0.1-0.
It is preferable to arrange them at intervals of 5 m so that the oxygen-containing gas for aeration is uniformly diffused by jetting or the like throughout the entire purification area S.

The polluted water purifying apparatus 20 of the present invention is formed as described above, and the polluted water is evenly distributed in the purifying area S from the inflow rectifying wall 24 to the discharge rectifying wall 25 through the inflow channel 21. Can be purified. That is, the floating fine solid matter in the polluted water flowing through the purification zone has a reduced flow velocity of the polluted water near the peripheral surface of the purifying member 1 and / or 10, so that the purifying member is closest to the purifying member due to the difference in flow velocity between the left and right. It moves and reaches the purification member, is separated from the polluted water, is captured in the opening of the surface of the hollow body constituting the purification member, and is accumulated inside the hollow for anaerobic treatment. In addition, other soluble contaminants in polluted water, such as ammonia-based substances, dissolved BOD substances, anionic surfactants, musty odor substances, etc., are nitrified by the biofilm formed on the outer surface of each purification member, Aerobic treatment such as insolubilization and decomposition. In the purification zone S of the polluted water purification device of the present invention,
The polluted water introduced from the inflow part 21 flows in a substantially horizontal direction as shown by the arrow in the figure, while the aeration gas, for example, air is ejected from the diffuser holes 26 of the diffuser pipe 23 and is almost vertical as fine bubbles. As it rises to the
They will always make efficient contact over a wide area. Therefore,
The efficiency of dissolution of oxygen in the flowing polluted water increases, and the amount of dissolved oxygen in the polluted water increases. At the same time, on the surface of the purifying member, the polluted water flow and the aeration gas come into contact with each other at the same time, and the formation of the film layer is suppressed. Therefore, the hollow body 1 of each purification member
And / or the microbial film formed on the surface of 11 and the polluted water having a high dissolved oxygen content are sufficiently brought into contact with each other to promote aerobic biological treatment.

As described above, in the purification method of the present invention, the formation of the boundary film is suppressed in the purification zone and sufficient dissolved oxygen is supplied to the biofilm formed on the surface of the purification member to efficiently perform the aerobic treatment. It can be carried out rapidly, and the purification of polluted water can be carried out at a flow rate several tens to 50 times that of the conventional method. That is, about 5
It is possible to purify polluted water with a short residence time of 10 minutes. Also, because the flow velocity of polluted water becomes faster,
Synergistically, the contact between the almost horizontal flow of polluted water and the upward flow of fine bubbles is expanded, and the purification rate is further increased. Air diffuser 23
The amount of ventilation from the
It can be appropriately selected depending on the quality of the polluted water. Usually, the amount of polluted water should be about 0.5 to 2 times. In the present invention, the air diffused from the air diffuser holes 26 of the air diffuser 23 in the purification area such as air may be constantly diffused from all the air diffusers 23 during the purification process, or a plurality of diffusers arranged. 23, 23,
.. may be intermittently diffused by a predetermined number, for example, alternately from adjacent diffusers.

Example 1 First, as in the case shown in FIGS. 1 and 2, the outer diameter is about 10c.
The spherical purification member 1 of m was manufactured using polypropylene. Next, width 0.6m, length 2.1m, height 1.6m
In the rectangular parallelepiped purifying treatment tank, the purifying member prepared above was filled and arranged with a porosity of 30 to 40%, and a purifying apparatus 20 similar to that in FIG. 4 was manufactured. In the purification device 20 produced above, S
S 15 mg / liter, BOD 10 mg / liter, ammoniacal nitrogen 8 ppm, anionic surfactant concentration 0.
Treated polluted water having 49 ppm and a musty odor substance (dimethylene isoborneol (2-MIB)) of 0.36 ppb was circulated at a flow rate of 1.34 liters / second with a residence time of 10 minutes. As a result, the effluent after the lapse of 0.2 hours was SS2 mg / liter, BOD2 mg / liter, ammonia-based substance 0.5 ppm, anionic surfactant concentration 0.34 ppm, and musty odor substance 0.10 ppb on average, Each removal rate is SS87%, BOD80%, ammonia type substance 94%, anionic surfactant 30%, musty odor substance 72%
Met.

Example 2 A golf ball with a hole for practice as a hollow body 11 (diameter of about 3
3) were connected as shown in FIG. 3 using a polyacetal resin rod as a reinforcing material with a gap of each ball being about 7 mm to produce a purification member 10. A purification device was formed in the same manner as in Example 1 except that the produced coupling purification member 10 was used, and the polluted water was purified in the same manner. In this case, in the purifying device filled with the purifying member 10, the total porosity between the purifying members, that is, the golf balls was about 40%. As a result of purifying the contaminated water, the effluent water after 0.2 hours was SS3 mg / liter on average, BOD
2 mg / liter, ammoniacal nitrogen 0.5 ppm, anionic surfactant concentration 0.36 ppm, musty odor substance 0.
12 ppb, each removal rate is SS80%, BOD80
%, Ammonia-based substance 94%, anionic surfactant 27
% And musty odor substance 67%.

[0021]

The purification member of the present invention is a hollow body having a predetermined size or a predetermined connection, and is filled and disposed in the purification zone, and the biofilm formed on the outer peripheral surface thereof is aerobically treated. However, in the hollow inside communicating from the hole having the opening on the outer surface, the floating fine solids trapped in the opening and accumulated in the hollow can be anaerobically treated, and The contaminants can be effectively purified while removing and treating the organic substances therein. Further, in the present invention, in the purification area filled with a hollow body having a hole having an opening on the outer surface as a purification material, the contaminated water is circulated in the horizontal direction, and at the same time, the aeration gas is discharged from the bottom as fine bubbles. As a result, it is possible to suppress the formation of a boundary film layer on each purification member surface by jetting over the entire purification area, improve the purification efficiency, and significantly shorten the purification time.

[Brief description of drawings]

FIG. 1 is a conceptual explanatory view of an embodiment of a purification member of the present invention.

FIG. 2 is a vertical cross-sectional explanatory view of the purification member of FIG.

FIG. 3 is a conceptual explanatory view of another embodiment of the purification member of the present invention.

FIG. 4 is a partial cross-sectional explanatory view of an embodiment of the purifying device of the present invention.

[Explanation of symbols]

 A, B Hemisphere C Joint part D Hollow internal space S Purification area 1, 10 Purification member 2, 12 Drilled hole 3, 3'Reinforcement beam 13 Reinforcement material 20 Contaminated water purification device 21 Inflow water channel 22 Exhaust water channel 23 Diffuser tube 24 Inflow water straightening wall 25 Discharge water straightening wall 26 Air diffuser

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] January 25, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a conceptual explanatory view of an embodiment of a purification member of the present invention.

FIG. 2 is a vertical cross-sectional explanatory view of the purification member of FIG.

FIG. 3 is a conceptual explanatory view of another embodiment of the purification member of the present invention.

FIG. 4 is a partial cross-sectional explanatory view of an embodiment of the purifying device of the present invention.

FIG. 5 is an explanatory view of an embodiment of the air diffuser of the present invention.

[Explanation of Codes] A, B Hemisphere C Joint part D Hollow internal space S Purification area 1, 10 Purification member 2, 12 Drilled hole 3, 3'Reinforcement beam 13 Reinforcement material 20 Contaminated water purification device 21 Inflow water channel 22 Discharge Water channel 23 Air diffuser 24 Inflow water straightening wall 25 Discharge water straightening wall 26 Air diffuser

Claims (7)

[Claims] 1. A hollow body having an equivalent diameter of about 70 to 150 mm, two or more drilled holes having openings of about 5 to 50 mm are formed on the outer surface, and the compressive strength is 50 kg / cm.
^A member for purifying polluted water, which is characterized by having ² or more. 2. An equivalent diameter of about 30 to 70 mm in which two or more drilled holes having an opening of about 5 to 30 mm are formed on the outer surface.
^2. A polluted water purifying member, wherein a plurality of the hollow bodies are connected and fixed to each other through a reinforcing material and have a compressive strength of 50 kg / cm ² or more. 3. The polluted water purification member according to claim 1, wherein the hollow body is a substantially spherical body. 4. The polluted water purification member according to claim 1, wherein the hollow body has an open area ratio of about 5 to 40% on the outer surface area. 5. A purification area having an inflow section and an outflow section, each of which is provided with a straightening member, and filled with the polluted water purification member according to any one of claims 1 to 4. In addition, the polluted water is introduced from the inflow portion to evenly flow between the polluted water purification members to the outflow portion, and the oxygen-containing gas is jetted in the form of fine bubbles from the bottom of the purification zone to the entire purification zone. A method for purifying polluted water, which comprises purifying water in a short time. 6. The residence time of the polluted water in the purification area is 5 to 4
The method for purifying polluted water according to claim 5, which is 0 minutes. 7. An uncovered or capped device for treating polluted water, comprising: an inflow part of the polluted water, an outflow part of the treated water, rectifying members respectively arranged in the inflow part and the outflow part, and the inflow part. And a purifying zone which is arranged between the outflow portion and filled with the polluted water purifying member according to any one of claims 1 to 4, and
An apparatus for purifying polluted water, comprising air diffusers arranged at predetermined intervals at the bottom of the purification zone.