JP2003164891A - Water cleaning block and method of manufacturing the same and water cleaning equipment using this water cleaning block - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide water cleaning equipment of a new construction with which an effect of improving water cleaning by microorganisms, etc., can be realized by approximately uniformly discharging air bubbles from wide regions of base surfaces of rivers, etc. <P>SOLUTION: The blocks 24 laid on the bottom 22 of the river 12 are formed of porous concrete and vent pipe bodies 28 are approximately horizontally embedded and arranged within the blocks 24. The compressed air discharged from a plurality of air discharge holes 38 drilled at the vent pipe bodies 28 is passed through the inside of the blocks 24 by utilizing the continuous pores of the porous concrete and is discharged into the water from the base surface 25 of the river. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a technology related to water purification for rivers, etc., and particularly, it is disposed at the bottom of a river etc. to efficiently aerate water to improve water purification action by microorganisms and the like. A new structure of water purification block that can be used, a method that can easily manufacture such a water purification block with stable quality, and a water purification function of a river or the like can be more effectively performed by using the water purification block. It relates to a water purification device.

[0002]

BACKGROUND ART Water supply or water storage facilities such as rivers and drainage channels, lakes, ponds, water storage channels and water tanks (in this specification, "rivers, etc."
Collectively. As a kind of water purification device for running water or stored water in), for example, as disclosed in Japanese Patent Laid-Open No. 2001-9489, aeration is performed from the bottom of a river or the like to proliferate and activate aerobic microorganisms, and sewage of microorganisms. It is known that the structure purifies water by the decomposition action.

By the way, in order to effectively realize the water purification effect by aeration, it is required to eject fine air bubbles in a substantially uniform manner over a wide range of the bottom of a river or the like.

However, in the conventional water purifier, as described in the above publication, a pipe for aeration is arranged in a space for piping provided at the bottom of a river or the like, and compressed air is supplied to this pipe. Compressed air supplied and discharged through a large number of discharge holes drilled in the pipe body, if necessary, through a breathable filter medium,
Since it has a simple structure that discharges into water such as rivers, the distribution of discharge air into water is insufficient, and the distribution of discharge air often has a significant deviation, resulting in an effective water purification effect. There was a problem that it was difficult to be done.

[0005]

The present invention has been made in view of the circumstances as described above, and the problem to be solved is that aeration can be performed substantially uniformly in water of a river or the like. With a new structure of water purification block that can efficiently achieve the desired water purification effect by
It is to provide an advantageous manufacturing method thereof and a novel water purification apparatus using the water purification block.

[0006]

In order to solve the above-mentioned problems, the present inventor has to improve strength, manufacturability, manufacturing cost, environmental friendliness, etc. in order to eject fine bubble-like air over a wide range of the bottom of a river. After considering it, we considered the use of porous concrete, which is a porous material with fine continuous pores (voids).

Therefore, first, a hollow air chamber is formed at the bottom of a river or the like, the upper bottom wall of the air chamber is covered with porous concrete, and an air supply port is provided through the side wall of the air chamber. A system has been devised in which compressed air is supplied to the air chamber from the air supply port so that the compressed air passes through continuous pores of porous concrete and is discharged into the water from the bottom surface of a river or the like. However, in such a system, the compressed air is discharged only in the vicinity of the air supply port on the bottom surface formed of porous concrete, and it is extremely possible to uniformly discharge the air in a sufficiently wide range. It was difficult.

In order to deal with the problem of the bias of the discharged air, the inventor of the present invention (a) applies compressed air directly from the air supply port to the air chamber formed at the bottom of the river as described above. Instead of supplying, a compressed air supply pipe having a plurality of discharge holes penetrating the peripheral wall portion is provided by inserting it into the air chamber, and through this supply pipe, compressed air that is as uniform as possible in a wide range of the air chamber is provided. An improved system for supplying air, or (b) a large air chamber is divided, and a plurality of hole-shaped air holes extending substantially horizontally from the side surface of the block of porous concrete are perforated, and from the opening of each air hole. An improved system designed to provide compressed air was also devised.
However, in any of these improved systems,
Uneven distribution of the compressed air discharge area on the bottom of rivers was difficult to be solved sufficiently, and as mentioned above, it is still an effective measure against the problem that it is difficult to effectively exert the water purification effect by aeration. I didn't get it.

As described above, the present invention has been completed as a result of earnest studies by the present inventor based on new findings obtained from many experiments and verifications. According to a first aspect of the invention, a ventilation pipe body having a plurality of air discharge holes on its outer peripheral surface is embedded in a block made of porous concrete laid at the bottom of a river or the like so as to extend in a substantially horizontal direction. At the same time, by providing an air supply pipeline for supplying compressed air to the ventilation pipe and supplying compressed air through the air supply pipeline, the compressed air is supplied from the air discharge hole of the air supply pipeline. The water purification block is characterized by being jetted from the upper surface of the block through continuous voids in the block.

In the water purification block having the structure according to the present embodiment as described above, the ventilation pipe body having the air discharge holes is directly embedded in the porous concrete block, so that a large area of the block can be obtained. In contrast, compressed air can be supplied at a substantially uniform pressure, and as a result, it is possible to make good use of the minute continuous pores inherent in the porous concrete that forms the block to make the block wider. Small air bubbles can be discharged from the area.

Therefore, by laying such a water purification block at the bottom of a river or the like, it is possible to efficiently aerate a wide area at the bottom of the river or the like, and the effect of water purification by aerobic microorganisms or the like. Can be exhibited more efficiently.

The porous concrete employed in this embodiment has continuous pores, and the compressed air discharged from the air discharge holes of the buried ventilation pipe can be guided to the surface by the continuous pores. Any material may be used, and the material thereof is not particularly limited as long as the strength satisfies the required characteristics corresponding to the installation location and the like. In addition, the ventilation tube should be strong enough to withstand the external force exerted during the manufacturing of the block and after laying it, and durable to the porous concrete and the laying environment. For example, it should be made of synthetic resin such as vinyl chloride, metal, or hard rubber. A tubular body having an appropriate length can be appropriately adopted. Furthermore, the size, number, position, etc. of the air discharge holes formed in the ventilation pipe are not particularly limited, and the length of the ventilation pipe, the diameter of continuous pores in porous concrete, and the covering thickness of porous concrete. It can be set appropriately in consideration of the dimensions, the pressure of the compressed air supplied, and the like.

A second aspect of the present invention relating to the water purification block is the water purification block according to the first aspect, which is wholly continuous between the outer peripheral surface of the ventilation pipe and the block. It is characterized in that the outer peripheral surface of the ventilation pipe is disposed and fixed in contact with the block so that no gap is formed. According to this aspect as described above,
Compressed air discharged from the ventilation pipe is spread over a wider area in the block than when there is a gap between the outer peripheral surface of the ventilation pipe and the block that allows the ventilation pipe to be loosely inserted. The aeration can be more evenly distributed, and as a result, the bias of aeration on the block surface can be more effectively reduced or eliminated, and more uniform aeration from a wider area of the block surface can be achieved.

Further, a third aspect of the present invention relating to a water purification block is the water purification block according to the first or second aspect, wherein the air discharge holes in the ventilation pipe body are on the surface side of the block. It is characterized in that it is formed only in a region of a substantially half circumference located on either side of the back surface side. In such a mode, in a state in which the ventilation pipe body is arranged, with the half-circumferential portion of the ventilation pipe body where the air discharge hole is not opened being vertically upward,
By pouring the porous concrete, it is possible to prevent the porous concrete material from entering the air discharge holes of the ventilation pipe and becoming clogged, and as a result, the aeration can be performed from a large area on the surface. It is possible to realize the provision of a more stable quality water purification block that can be made substantially evenly.

A fourth aspect of the present invention relating to a water purification block is the water purification block according to any one of the first to third aspects, wherein a plurality of the ventilation pipes are formed by straight pipes. The fact that the books are arranged substantially horizontally and separated from each other in the horizontal direction is arranged in parallel.
Characterize. In this aspect, since the ventilation pipe is arranged substantially horizontally, it is possible to reduce or prevent the deviation of the air discharge amount in the longitudinal direction of the ventilation pipe due to the atmospheric pressure difference and the like. As a result, it becomes easy to arrange the ventilation pipes in the block at a small interval, and as a result, it is possible to evenly aerate the air from the block surface in a wider area. It should be noted that the plurality of ventilation pipes may be arranged with a height difference therebetween in the vertical direction.

A fifth aspect of the present invention relating to a water purification block is the water purification block according to any one of the first to fourth aspects, wherein the ventilation pipe is arranged in a flowing direction of the river or the like. It is characterized in that it is arranged so as to extend in a width direction of a river at a substantially right angle. In this aspect, in the case of a running channel such as a river, even if the block is arranged to be inclined in the flowing direction, it is possible to suppress the inclination of the ventilation pipe body. Even in the case where the ventilation pipes are laid so as to be inclined, it is possible to reduce or prevent the deviation of the air discharge amount in the longitudinal direction of the ventilation pipes due to the difference in atmospheric pressure due to the inclined arrangement of the ventilation pipes.

Further, a sixth aspect of the present invention relating to a water purification block is the water purification block according to the fifth aspect, wherein the air supply pipeline is connected to one end of the ventilation pipe body, It is characterized in that the other end of the ventilation pipe is closed. According to such this aspect, it is possible to open the ventilation pipe on the side wall side of the channel such as the riverbank of the flowing channel of the river, etc., and connect the air supply pipe to it, and to the central part of the channel. Installation of the air supply line can be avoided, and installation and management of the air supply line can be facilitated.

A seventh aspect of the present invention relating to a water purification block is the water purification block according to any one of the first to sixth aspects, wherein the opening area of the air discharge hole in the ventilation pipe is It is characterized in that the length of the ventilation pipe is different in the longitudinal direction, and the length of the ventilation pipe is larger than that of the ventilation pipe which is closer to the connection portion of the air supply pipe. According to this aspect, when the ventilation pipe is long and has a plurality of air discharge holes spaced apart from each other in the longitudinal direction, it is caused by a relative difference in air discharge pressure from the plurality of air discharge holes. The deviation of the air discharge amount can be reduced or eliminated, and as a result, the deviation of the discharge air can be prevented and a more uniform aeration can be realized in a wider area of the block surface.

Further, an eighth aspect of the present invention relating to a water purification block is the water purification block according to any one of the first to seventh aspects, wherein the ventilation pipe is provided to the ventilation pipe through the air supply pipe line. A feature is that a pressure regulating valve is provided on the compressed air supply path. According to this aspect, the amount of air discharged from the ventilation pipe through the continuous pores in the block to the surface of the block can be adjusted by the pressure adjusting valve. Also, when arranging a plurality of ventilation pipes, or when laying a plurality of water purification blocks,
By adjusting the discharge amount between multiple ventilation pipes and between multiple water purification blocks, it is possible to further improve the uniformity of the discharge amount of air that is aerated over the entire bottom of a river. Therefore, for example, even if there is a difference in height between the plurality of ventilation pipes or between the plurality of water purification blocks, it is reduced or finely adjusted by finely adjusting the deviation of the discharge amount due to the atmospheric pressure difference. It can also be resolved.

A ninth aspect of the present invention relating to the water purification block is the water purification block according to any one of the first to eighth aspects, wherein the back surface of the block is:
It is characterized in that a reverse concave groove extending in the flowing direction of the river is formed. According to this aspect of the invention, it is possible to form an underdrain-shaped running water channel or an aquifer area between the support plate and the underside of the water purification block, and by the compressed air discharged from the block, By making the flow of water from these forms of water channels and aquifers to the surface through continuous pores in the block, further improve the activity of microorganisms inside the block and the front and back sides, and further improve the water purification effect. Will also be possible.

A tenth aspect of the present invention relating to a water purification block is the water purification block according to any one of the first to ninth aspects, wherein at least a part of a bottom portion and an outer peripheral wall portion of the block is: It is characterized by being formed of non-porous general concrete. In this embodiment, the strength and durability of the block can be improved by forming a part of the block with non-porous general concrete. Further, by forming the surface that does not require air ejection from non-porous general concrete, it is possible to improve the aeration efficiency of the compressed air to the required ejection surface.

Further, a feature of the present invention relating to a method for producing a water purification block is that the porous concrete is placed in the mold of the block under the condition that the ventilation pipe is positioned in the mold of the block. In producing the water purification block having the structure according to any one of the first to tenth aspects, in which the ventilation pipe is embedded in the block, the air in the ventilation pipe is added. In the method for manufacturing a water purification block, the discharge holes are positioned only in a substantially half-circumferential region positioned vertically below when the porous concrete material is charged.

According to the method of the present invention as described above, it is possible to prevent the porous concrete material from entering the air discharge holes of the ventilation pipe and becoming clogged when pouring the porous concrete. The target water purification block can be easily manufactured with stable quality, in which aeration can be performed substantially uniformly over a wide area of the surface.

A feature of the present invention relating to a water purification apparatus is that at least one water purification block according to any one of the first to tenth aspects is laid at the bottom of a river,
The compressed air is supplied through the air supply pipe so that the compressed air can be ejected from the upper surface of the block.

In the water purifying apparatus having the structure according to the present invention as described above, it is possible to aerate substantially uniformly from the wide bottom of the bottom of a river or the like, whereby the effect of water purifying by aerobic microorganisms can be efficiently achieved. It can be demonstrated.

Moreover, by adopting a water purification block manufactured in an appropriate size and shape, it is possible to easily construct at a low cost, and a plurality of water purification blocks having an appropriate size and shape can be used. By laying in combination, rivers of various sizes and shapes can be easily and efficiently dealt with and installed at the bottom of rivers.

Further, in the water purification apparatus according to the present invention,
It is desirable to form a water-permeable weir made of porous concrete at least on the upstream side of the laying region of the water purification block in the river or the like. In this way, it is possible to make good use of the continuous pores of porous concrete to moderate the flow of water in the area where the water purification device is installed and to suppress significant turbulence, thereby improving the water purification effect based on aeration by the water purification device. It becomes possible to exert it more efficiently.

Further, in the water purification device according to the present invention,
As one of the preferred embodiments, a plurality of the water purification blocks are laid at the bottom of the river or the like, and a communication pipe line that connects the air supply pipe lines of the plurality of water purification blocks to each other is provided to provide a common line. The compressed air supply path is used to supply compressed air to the ventilation conduits of the water purification blocks, while the supply pressure of the compressed air to the ventilation conduits of the water purification blocks is adjusted separately. A mode may be adopted in which a pressure regulating valve is provided so that the supply pressure of the compressed air can be adjusted in accordance with the arrangement height of the ventilation pipe. According to this aspect, compressed air can be supplied to each of the ventilation pipes of the plurality of water purification blocks through a common communication pipe, and the installation height of each ventilation pipe is different. Since the compressed air supply pressure can be adjusted appropriately in consideration of the above, a simple compressed air supply system pipe structure allows uniform distribution over the entire water purification block laid at the bottom of a river or the like. Aeration can be advantageously realized.

[0029]

Embodiments of the present invention will now be described in detail with reference to the drawings in order to more specifically clarify the present invention.

First, FIGS. 1 to 3 show a water purifying apparatus 10 as an embodiment of the present invention. This water purification device 1
Reference numeral 0 is configured to include an aeration tank 14 arranged on a flowing water channel 12 through which contaminated water is made to flow, a pair of static flow tanks 16 and 16, and the like. In the following description, the left side of FIGS. 1 and 2 is the upstream side, and the right side of FIGS. 1 and 2 is the downstream side.

More specifically, the pair of static flow tanks 16 and 16 constituting the water purifying apparatus 10 are respectively provided near the upstream end and the downstream end of the aeration tank 14, and the vertical upstream and downstream ends. Wall 1
8 and 19 and shell medium 20. Up-down stream vertical wall 1
Each of 8 and 19 is made of porous concrete having a rectangular plate shape, is erected substantially vertically to the bottom portion 22 of the flowing water channel 12, and is positioned to face each other while being separated in the flowing water direction. There is. In addition, each of these vertical walls 18,
A shell medium 20 is provided on each bottom portion 22 of the static flow tanks 16, 16 formed between the facing surfaces of 19. The shell medium 20 is formed by packing a shell of oyster shell or the like in a static flow tank 16 directly or by packing it in a suitable water-permeable mesh bag or the like, and if necessary, aquatic organisms such as papyrus. Plants are being planted.

An aeration tank 14 is installed between the pair of static flow tanks 16 and 16 on the flowing water channel 12. The aeration tank 14 includes a downstream vertical wall 19 of an upstream static flow tank 16.
Is formed between the facing surfaces of the upstream vertical wall 18 of the downstream static flow tank 16, and in the present embodiment, the downstream vertical wall 19 and the upstream side of these upstream and downstream static flow tanks 16 and 16. The vertical wall 18 constitutes a weir. In addition, a plurality of aeration blocks 24 (for example, 4 to 50) are arranged on the bottom of the aeration tank 14 with almost no space and are substantially horizontal as a whole, or from the upstream side to the downstream side. A waterway bottom surface 25 is formed which is slightly inclined downward.

As shown in FIGS. 4 to 5, the aeration block 24 is made of porous concrete having a thick rectangular plate shape. Here, porous concrete is a porous concrete product having continuous pores, and a detailed description thereof will be omitted because it is a well-known structure. However, an aggregate having a predetermined grain size is coated with mortar or the like. It has a porous structure fixed at the contact points. Specifically, for example, by using a raw material obtained by kneading cement, water, an aggregate, an admixture, an admixture, etc., by placing it in a formwork in which necessary rust preventive reinforcing bars and the like are arranged in advance, Aeration block 24 made of porous concrete
Can be manufactured as a reinforced concrete structure or as a reinforced concrete structure. As the aggregate, quarry of single grain size or mixed grain is advantageously used. The particle size of the aggregate is 5 (13 to 25 mm), 6 (5 to 13 mm), in order to form continuous pores of an appropriate size.
No. 7 (2.5 to 5 mm) is desirable. Furthermore, a high-performance water reducing agent, a high-performance AE water reducing agent, or the like can be used as the admixture, and silica fume, fly ash, blast furnace slag, or the like can be used as the admixture.

Further, a reverse recessed groove-shaped recess 26 that opens downward is formed on the lower surface of the aeration block 24 so as to extend in the running water direction when the block 24 is installed. Thus, a water passage 27 having an underdrain structure continuously extending in the flowing direction is formed in the bottom wall portion of the flowing water channel 12 formed by laying a plurality of aeration blocks 24.

Furthermore, the vertical walls 18 and 19 on the upstream and downstream sides that define the static flow tanks 16 and 16 are formed almost entirely of porous concrete so that running water can be permeated through the continuous pores. Therefore, the permeation of the flowing water through the vertical walls 18 and 19 on the upstream and downstream sides reduces or suppresses significant turbulence, and the sewage (purification target water) flows through the aeration tank 14 in a gentle overall flow state. It is designed to be punished.

Further, a plurality of air discharge pipes 28 as ventilation pipes are embedded in such an aeration block 24. The air discharge pipe 28 has a straight pipe shape extending in a constant circular cross section, and is formed of a synthetic resin pipe body such as a vinyl chloride pipe. The air discharge pipe 28 is arranged so as to extend substantially at right angles to the flowing water direction, that is, to extend in the river width direction over substantially the entire width direction (vertical direction in FIG. 4) of the aeration block 24. There is. Particularly, in the present embodiment, four rebars 36 are assembled in a cross beam shape and arranged in the aeration block 24.
By being fixed to each of the air discharge pipes 28, each of the air discharge pipes 28 is supported in a state of extending in a substantially horizontal direction. In each air discharge pipe 28, the sealing material 29 is press-fitted and fixed to the opening end on the side positioned in the center of the river width in the installed state, and the opening end is fluid-tightly closed. The other open end of each air discharge pipe 28, that is, the end located on the river side in the laid state, is directed upward in the vicinity of the end that does not reach the end of the aeration block 24. It is bent at a substantially right angle, and a compressed air supply port is formed on the surface of the aeration block 24 (the water channel bottom surface 25).

Further, each air discharge pipe 28 has a large number of jet holes 38 as air discharge holes penetrating the pipe wall. As shown in FIG. 6, the plurality of ejection holes 38 are located in the vertically lower half circumferential portion of the air discharge pipe 28 under the laid condition of the aeration block 24. The position is set so as not to open in the vertically upper half portion of the discharge pipe 28. For example, at a plurality of positions separated by a predetermined distance in the longitudinal direction of the air discharge pipe, three positions in the vertical downward direction and in the horizontal direction, respectively. A jet hole 38 is formed so as to open in the.

Furthermore, in these ejection holes 38, it is possible to make the intervals of the air discharge pipes 28 different from each other in the longitudinal direction, or to make the diameters of the openings different from each other. It is possible to reduce or eliminate the unevenness of the discharge air amount due to the pressure difference in the longitudinal direction of 28. In particular, according to the examination by the present inventor,
In the longitudinal direction of the air discharge pipe 28, the plurality of ejection holes 38 are arranged such that the diameter of the ejection holes 38 increases as the distance from the compressed air supply port increases, that is, the closer to the end on the sealing side by the sealing material 29. It is effective to set the diameters of the above to be gradually different in the longitudinal direction of the air discharge pipe 28 in order to make the discharge air discharged from a wide region uniform.

The aeration block 24 is manufactured by arranging the reinforcing bar 36 and the air discharge pipe 28 in the concrete form, then pouring the porous concrete material and filling it with a vibrator. Thereby, in the obtained aeration block 24, the porous concrete is brought into close contact with substantially the entire outer peripheral surface of the air discharge pipe 28. When the compressed air is ejected from the ejection holes 38 of the air discharge pipe 28, the compressed air is directly guided to the continuous pores of the aeration block 24.

Thus, the plurality of aeration blocks 24 having such a structure connect the two in the width direction of the flowing water channel 12 without a gap and also have a large number in the longitudinal direction (flowing direction) of the flowing water channel 12. The sheets are laid on the bottom portion 22 of the running water channel 12 in a state of being connected without any gaps, whereby the substantially entire bottom portion of the aeration tank 14 is constituted by the aeration block 24. Further, communication conduits 46a and 46b are arranged and fixed to both side wall portions 40 of the flowing water passage 12 in the aeration tank 14 so as to extend over substantially the entire length in the flowing water direction. These communication lines 46
a and 46b are connected to each other by connecting pipes 44 whose both ends on the downstream side extend in the river width direction, so that one communication pipe 4 is formed as a whole.
6, the upstream end of the communication pipe 46a disposed on one riverbank is fluid-tightly sealed, and the upstream end of the communication pipe 46b disposed on the other riverbank. A compressed air supply pipe 50 from the air pump 48 is connected to. Thereby, the compressed air generated by the air pump 48 is supplied from the compressed air supply pipe 50 to the communication pipe line 46.

Further, a plurality of air supply pipelines 42 are connected to the communication pipelines 46a and 46b arranged on the left and right banks at appropriate intervals in the longitudinal direction, and these air supply pipelines are connected. The compressed air supplied from the air pump 48 is supplied to the air discharge pipes 28 through the passages 42. Then, the compressed air is discharged into the aeration block 24 from the ejection holes 38 of the air ejection pipe 28, and is ejected from the bottom surface 25 of the aeration tank 14 through the continuous pores of the porous concrete forming the aeration block 24. It is supposed to be done.

A pressure regulating valve 50 is installed in each of the air supply pipes 42. By adjusting the opening of the pressure regulating valve 50, each air discharge pipe 28 can be controlled.
The pressure of the compressed air ejected from the ejection holes 38, and hence the ejection amount, can be adjusted appropriately and relatively among the plurality of air ejection pipes 28.

In the water purifying apparatus 10 having the above structure, the aeration block 24 made of porous concrete is used.
Since compressed air is jetted into the aeration block 24 from the jet holes 38 of the air discharge pipe 28 which are directly buried in the aeration block, the continuous pores in the porous concrete are used very skillfully to perform the aeration. Bottom 2 of tank 14
The compressed air can be ejected substantially uniformly from the extremely wide area of No. 5, and in particular, in the present embodiment, a large number of air discharge pipes 28 are arranged substantially horizontally so as to extend in the river width direction. In addition, in the inclined flowing water direction, by arranging a plurality of the air discharge pipes 28 independently of each other, the difference in the jetting amount due to the influence of the atmospheric pressure in the compressed air jetted from the air jetting pipes 28 is reduced. Therefore, it is possible to suppress unevenness in the discharge amount of compressed air more efficiently.

Moreover, in this embodiment, each air discharge pipe 2
Since it is possible to adjust the supply pressure and the supply amount of the compressed air by operating the pressure regulating valve 50 for each 8, the discharge amount of the compressed air is mutually adjusted in a plurality of areas in the aeration tank 14 according to various conditions. It is possible to easily make adjustments such as making them different or making them substantially the same as a whole.

By performing the aeration efficiently as described above, the activity of aerobic microorganisms is improved,
It becomes possible to purify running water (polluted water) more efficiently.

Further, in this embodiment, the underdrain type water passage 27 is formed below the aeration block 24, and the downstream vertical wall 19 and the downstream static flow of the upstream static flow tank 16 are formed. The water passage 2 that passes through the upstream vertical wall 18 of the tank 16
Since the water is passed to the inside of the aeration block 7, the inside of the aeration block 24 is moved from the water passage 27 to the inside of the aeration block 24 with the flow of the compressed air that is moved upward in the aeration block 24 and discharged from the surface 25. A water flow that permeates to the running water channel 12 is also generated, whereby the activation of microorganisms, for example, in the aeration block 24 and on the front and back surfaces can be achieved more effectively.

Furthermore, in this embodiment, the aeration tank 14
Since the static flow tank 16 is formed in the upstream and downstream parts of the plant, crushed oyster shells and the like are laid in the static flow tank 16, and planting plants are planted as necessary. , Water purification effect of such oyster shells and planted plants (P, N ₂
Can also be advantageously enjoyed.

Although the embodiments of the present invention have been described in detail above, this is merely an example, and the present invention should not be construed as being limited to the specific description of the embodiments.

For example, the present invention has been used on the flowing water channel as illustrated, but the present invention is not limited to this, and specifically, the purifying water channel and the Japanese Patent Laid-Open No. 2000-202479. The present invention is also applicable to various water purification devices using aeration, such as the water purification device described in 2000-709936 and the water purification system described in JP 2000-176447 A.

Although not listed one by one, the present invention
The present invention can be carried out in a mode in which various changes, modifications, improvements, etc. are added based on the knowledge of those skilled in the art, and such a mode does not depart from the gist of the present invention.
Both are included within the scope of the present invention,
Needless to say.

[0051]

As is apparent from the above description, in the purification block having the structure according to the present invention and the water purification apparatus using the same, continuous pores of porous concrete in the block laid at the bottom of a river or the like are provided. By making good use of this, compressed air of small bubbles can be ejected from a bottom surface of a river or the like almost uniformly over a wide area, whereby the water purification efficiency by aerobic microorganisms or the like can be improved.

Further, according to the manufacturing method of the present invention, it is possible to easily manufacture the purifying block having the structure according to the present invention while avoiding the blockage of the air discharge hole formed in the ventilation pipe. Is possible.

[Brief description of drawings]

FIG. 1 is an explanatory plan view showing a water purification device as an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a vertical cross-sectional explanatory view of the water purification device shown in FIG. 1.

4 is an enlarged plan view showing an aeration block constituting the water purification apparatus shown in FIG. 1. FIG.

5 is a sectional view taken along line VV in FIG.

FIG. 6 is an enlarged explanatory view of a main part of FIG.

[Explanation of symbols] 10 Water purifier 12 running water 22 bottom 24 Aeration block 28 Air discharge pipe 38 ejection holes 48 air pump

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yuhisa Yuasa             5-5-45 Takachaya, Tsu City, Mie Prefecture Mie Prefecture             Science and Technology Promotion Center, Industrial Research Department (72) Inventor Akihiro Maekawa             5-5-45 Takachaya, Tsu City, Mie Prefecture Mie Prefecture             Science and Technology Promotion Center, Industrial Research Department (72) Inventor Nobuhisa Kitano             622 Seta Town, Ise City, Mie Prefecture             Civil Affairs Bureau Planning and Coordination Department Miyagawa Basin Renaissance             Indoor (72) Inventor Satoshi Matsumoto             Akita Prefecture Akita City Shimoshinjo Nakano Highway West 241-             7 Department of Biological Environment, Faculty of Bioresources, Akita Prefectural University             Within the department (72) Inventor Masao Okano             5500 Hachi, Misugi-mura, Isshi-gun, Mie Prefecture Sewa Construction Co., Ltd.             Inside the company F-term (reference) 2D018 EA00                 4D029 AA01 AB07 BB11                 4G052 FA02 FB07                 4G058 GA04 GC01 GE06 GE11

Claims (14)

[Claims] 1. A ventilation pipe provided with a plurality of air discharge holes on its outer peripheral surface is embedded in a block made of porous concrete laid on the bottom of a river or the like so as to extend in a substantially horizontal direction, and By providing an air supply conduit for supplying compressed air to the ventilation pipe and supplying the compressed air through the air supply conduit, the compressed air is continuously supplied from the air discharge hole of the air supply conduit to the block. A water purification block characterized in that it is made to be jetted from the upper surface of the block through the above-mentioned voids. 2. The outer peripheral surface of the ventilation pipe is disposed and fixed in contact with the block so that no continuous gap is formed between the outer peripheral surface of the ventilation pipe and the block. The water purification block according to claim 1. 3. The air discharge hole in the ventilation pipe is formed only in a substantially half-circumferential region located on either one of a front surface side and a rear surface side of the block. Water purification block described in. 4. The method according to claim 1, wherein a plurality of the ventilation pipes formed of straight pipes are arranged substantially horizontally and separated from each other in the horizontal direction and substantially parallel to each other. Block for water purification described. 5. The water purification block according to any one of claims 1 to 4, wherein the ventilation pipe is arranged so as to extend in a width direction of a river or the like at a right angle to a flowing water direction of the river or the like. 6. The water purification block according to claim 5, wherein the air supply conduit is connected to one end of the ventilation pipe and the other end of the ventilation pipe is closed. 7. The opening area of the air discharge hole in the ventilation pipe is made different in the longitudinal direction of the ventilation pipe, and is farther than the one near the connection site of the air supply pipe in the ventilation pipe. The purified water block according to any one of claims 1 to 6, wherein the block is enlarged. 8. The water purification block according to claim 1, wherein a pressure regulating valve is provided on a supply passage of the compressed air to the ventilation pipe through the air supply pipe. 9. The reverse concave groove extending in the flowing direction of the river or the like is formed on the back surface of the block.
The water purification block described in any of 1. 10. The water purification block according to claim 1, wherein at least a part of a bottom portion and an outer peripheral wall portion of the block is formed of non-porous general concrete. 11. A material for the porous concrete is charged and filled into the mold of the block with the ventilation pipe being positioned and arranged in the mold of the block, and the vent pipe is filled in the block. It is a method for manufacturing the water purification block according to any one of claims 1 to 10, which is embedded, wherein the air discharge hole in the ventilation pipe is vertically downward when the material of the porous concrete is charged. A method for producing a water purification block, which is characterized in that it is positioned only in an approximately half-circumferentially positioned region. 12. At least one water purification block according to any one of claims 1 to 10 is laid at the bottom of a river or the like, and compressed air is supplied through the air supply pipe line to thereby remove the compressed air. A water purifier characterized in that the water is ejected from the upper surface of the block. 13. The water purification apparatus according to claim 12, wherein a water-permeable weir made of porous concrete is formed at least on the upstream side of the laying region of the water purification block in the river or the like. 14. A common compressed air is provided by laying a plurality of the water purification blocks at the bottom of the river or the like, and providing a communication pipe line that connects the air supply pipe lines of the plurality of water purification blocks to each other. Compressing air is supplied to the ventilation pipes of the water purification blocks by using a supply passage, while adjusting the supply pressure of the compressed air to the ventilation pipes of the water purification blocks. The water purifier according to claim 12 or 13, wherein a valve is provided so that the supply pressure of the compressed air can be adjusted according to the height of the ventilation pipe.