JP4586147B2 - Water purification equipment - Google Patents

Description

The present invention relates to a water purification apparatus that purifies water by filtering water to be treated sucked from rivers, lakes, and the like and biologically treating the filtrate.

  There are places where the flow of water is stagnant in rivers and lakes flowing through urban areas. Due to the inflow of domestic wastewater from the city area, eutrophication has progressed, and algae such as blue sea urchins and sludge substances such as sludge accumulate, and further foul odor is generated, which is a major environmental problem. As countermeasures, bacteria have been introduced, aquatic plants have been bred, shellfish have been released, etc., but no significant effect has been obtained.

In view of such a situation, in recent years, a water purification apparatus for purifying water such as rivers and lakes by biological treatment and filtration has been developed. For example, Patent Documents 1 and 2 below disclose a purification device for an obstructive water area in which air bubbled is mixed in pumped water pumped by a submerged aeration pump and ejected and dropped to perform a ripple action. This purification device is a so-called fountain device, and increases the amount of dissolved oxygen in the obstructive water area by taking in the air during the fountain. Moreover, this purification apparatus is equipped with a filter material made of acrylic long fibers. The following Patent Document 3 is provided with a foreign substance removal tank, an anaerobic filter bed tank, and a biological filtration tank, and a synthetic resinous hollow filter medium is used to aerate the filter medium to prevent clogging of the filter medium. Backwash to remove sludge and excess microorganisms is performed, and the backwash water after backwash contains sludge and microorganisms that have peeled off the filter medium. Water is purified by circulating each tank.
Japanese Patent No. 2814349 Japanese Patent Laid-Open No. 2003-340489 JP 2003-279536 A

  However, water such as rivers and lakes may contain harmful substances and harmful microorganisms. In the purification devices described in Patent Documents 1 and 2, harmful germs such as Legionella bacteria are scattered in the fountain. This has the problem of adversely affecting the health of nearby residents. Moreover, the filter material of an acrylic long fiber is easy to be clogged, and much effort is required to maintain the quality of the purification device, such as frequently replacing the filtration material of the purification device. Since the purification device of Patent Document 3 draws water from a river or a lake to a water purification device and performs the water purification treatment, the equipment becomes large and is not realistic.

Therefore, an object of the present invention is to propose a water purification apparatus that is safer than that in conventional rivers, lakes , and the like and that can continuously obtain a high water purification effect without clogging.

The water purification apparatus of the present invention includes a suction means for sucking water to be treated from a water purification tank disposed in a raw water area such as a river or a lake, and the water to be treated sucked by the suction means is filtered and held by a filter medium. Filtration means for biologically treating the filtrate with aerobic organisms, discharge means for discharging the water to be treated filtered by the filtration means, and filtration of the filtration means arranged in the filter medium storage space to take in air and a backwashing means for backwashing the timber, the filtering means and has a discharge detecting means is housed in the water purification tank of cylindrical shape, said discharge means, the flow path of the treated water filtered by the filtering means The drainage pipes are arranged radially in a horizontal cross section of the cylindrical water purification tank, and the treated water in the raw water area flows from a small hole provided on the side surface of the water purification tank, and is filtered by the filtering means. After filtration, it passes through the hole in the storage container. Flows into the storage container Te is sucked by the suction pump provided on the receiving container, is configured to be discharged into the water of the original water by drainage pipe, said from the filtration material by backwashing by said backwashing means The aerobic organisms are exfoliated and oxygen is given to the aerobic organisms by the taken-in air and discharged into the raw water area.

According to the present invention, the water to be treated is sucked from the original body of water such as rivers and lakes by the suction means is drained by the discharge detection means after being filtered by the filtering means, filtrate organisms by organisms to be held in the filtering material It is processed. At the time of backwashing, organisms are peeled off from the filter medium and discharged into raw water areas such as rivers and lakes. As a result, the water purification treatment by the filtering means is performed inside the water purification treatment apparatus, the biological treatment by the organisms discharged by backwashing is carried out outside the water purification treatment apparatus, and the high water purification effect combined with the treatment inside and outside the water purification treatment apparatus Is obtained. Furthermore, sludge and the like precipitated in the raw water area are biologically treated by the organisms discharged into the raw water area by backwashing, and the adhesive force is weakened and floats in the water. The suspended sludge and the like are easily sucked into the water purification apparatus by the suction means, and the water purification efficiency is increased. The sucked sludge, etc. becomes the food for the organism in the water treatment system and promotes its growth. As a result, the number of organisms discharged by backwashing also increases, and this series of cycles results in extremely high purified water inside and outside the water treatment system. An effect is obtained. Here, the organism is preferably a microorganism such as a bacterium, protozoan, or algae.

Water treatment apparatus of the present invention, the filtering means and emissions means is housed in the water purification tank of cylindrical shape, said discharge means, drainage tube to be a flow path of the treated water filtered by the filtering means It arrange | positions radially at the horizontal cross section of a cylindrical water purification tank, It is characterized by the above-mentioned. According to the invention, the drainage pipe emissions means because it is located radially in a horizontal cross section of the purified water tank cylindrical, it is possible to stabilize the attitude of the water treatment device in water. Since the water to be treated is discharged radially, the balance is not lost by the discharge of the water to be treated, and a stable posture is maintained. It is preferable that the water purification apparatus has a circular float (float part) attached to the upper part and is placed and floated in a raw water area such as a river or a lake. In raw water areas such as rivers and lakes, the bottom of the water is muddy. By floating and using the water purification apparatus, the water purification apparatus can be kept horizontal regardless of the state of the water bottom. Moreover, it is easy to move to the target place by making the said water purification apparatus float.

  Preferably, the organism is an aerobic organism, and the backwashing means takes in air and backwashes the filter medium. As long as the air is normal air, it is sufficient to use a conditioned gas adjusted to suit the habitat and growth of aerobic organisms. According to the present invention, the organism held in the filter medium is an aerobic organism, and the air is discharged by the backwashing means, so that the filter medium is prevented from being clogged by backwashing and at the same time dissolved oxygen in the water purification apparatus The living habitat of living things can be adjusted by increasing Oxygen is also supplied outside the water purification system, facilitating biological treatment in the raw water area.

  The filter medium is preferably a granular body having pleats on the surface. According to the present invention, even if the filter media come into contact with each other, the organisms held between the folds do not peel off from the filtering means, the organisms are stably held, and the organisms grow between the folds. Promoted. At the time of backwashing, air or the like discharged for backwashing flows along the pleats, so that the grown organism can be efficiently peeled and discharged from the filter medium. After discharging, the growth of organisms is promoted between the pleats, and the biological treatment capacity in the water purification apparatus is quickly restored, and a high water purification effect can be obtained by this cycle.

  According to the present invention, the water to be treated sucked from the raw water area is filtered and discharged by the filtering means, and is filtered at a predetermined timing between a series of treatments in which the filtrate is biologically treated by the organisms held by the filter medium. Backwash means. At the time of backwashing, organisms are peeled off from the filter medium and discharged into the raw water area. Thereby, the water purification process is performed by the filtering means in the water purification apparatus, and the water purification process is performed by the organism discharged at the time of backwashing outside the water purification apparatus, thereby obtaining a high water purification effect. Furthermore, the sludge and the like in the raw water area will float due to the loss of adhesive strength due to the biological treatment of the discharged organisms, and will be easily sucked into the water purification apparatus, thereby improving the water purification efficiency.

According to the water purification apparatus of the present invention, water purification treatment is performed by filtration means in the water purification apparatus, and sludge and the like are biologically treated by discharged organisms (bacteria) outside the water purification apparatus, and treatment inside and outside the water purification apparatus. High water purification effect is obtained in combination. Furthermore, sludge and the like adhering to the raw water area due to the biological treatment of the discharged organisms will float with weak adhesive force, and will be easily sucked into the water purification apparatus, resulting in high water purification efficiency. Living organisms in the water treatment system grow by the sludge sucked, and the grown organisms are discharged into the raw water area by backwashing and used for biological treatment. Is obtained. In other words, the present invention is not limited to a simple water treatment device, but also serves as a living organism (bacteria) culture device, so to speak, it functions in the same way as a natural shellfish, and is safer and less clogged than before. High water purification effect can be obtained continuously.

  Hereinafter, the water purification apparatus S according to the present invention will be described in detail. FIG. 1 is a front view showing an internal structure of the water purification apparatus S, FIG. 2 is a top view thereof, and FIG. 3 is a perspective view thereof. The water purification apparatus S is a water purification apparatus that purifies water in raw water areas such as rivers and lakes. This water purification apparatus S is used so that a part or the whole is submerged in water in the original water area, and is disposed above the water purification section C and the water purification section C for water purification treatment. The float part F which gives buoyancy to S is provided.

  The water purification unit C includes a suction unit 2, a filtration unit 3, a discharge unit 4, and a backwash unit 5, which are stored in the water purification tank 1.

  The water purification tank 1 is a cylindrical container provided with the bottom part 1a and the side part 1b, and the several small hole 1c is provided in the side part 1b.

The suction means 2 has a function of sucking water to be treated from the raw water area. As the suction means 2, a submersible pump P that can be operated in water is preferable from the viewpoint of being housed in the water purification tank 1 and used. Aspirate unit 2 is housed in a plurality of small holes 6a is a container 6 of a cylindrical shape provided disposed purified water tank 1, a small hole 1c water purification tank 1 a small hole 6a of the container 6 The treated water can be sucked from the raw water area. Although placement position Aspirate means 2 is optional, as substantially near the center of the bottom 1a of the water purification tank 1, it is preferable to keep the balance when installed water treatment apparatus S in water. In addition, when not using the submersible pump P, arrange | position a pump main body out of water, install the suction port of the piping connected with a pump in the water-purifying tank 1, and suck in to-be-processed water. Can do.

  The filtering unit 3 has a function of filtering the water to be treated sucked by the suction unit 2 with the filtering material 3a and biologically treating the filtered material with the organism held by the filtering material. In the present embodiment, the filtering means 3 includes a plurality of granular filter media 3 a, filled in a filter medium storage space 7 formed inside the water purification tank 1, specifically, a gap between the water purification tank 1 and the storage container 6. , 3a. The filter medium 3a is filled in the filter medium storage space 7 with a density sufficient to filter the water to be treated, and the filtered material is filtered by passing through the gap between the filter medium 3a. Yes.

  The particulate filter medium 3a may be a carrier having pores capable of supporting living organisms or an adsorbent that adsorbs and holds living organisms on the surface as long as it can hold living organisms. The material of the filter medium 3a may be any of synthetic resin, charcoal, coral sand, etc. as long as the material density is large and the specific surface area can be increased. Any shape such as a porous shape may be used.

  FIG. 4 is a diagram showing the filter medium 3a. The shape of the filter medium 3a is preferably a granule having pleats 3b bent on the surface of the granule from the viewpoint of achieving both the fixability and the peelability of the organism to be held. Since the pleat 3b is formed by forming the filter medium 3a made of synthetic resin in a spiral shape, the specific surface area can be increased while being strong.

  The filter medium 3a is disposed between the small hole 1c of the water purification tank 1 and the small hole 6a of the storage container 6, that is, in the middle of the flow path of the sucked water to be treated so that the water to be treated sucked into the filtering means 3 is in contact with it. Arranged.

  The filter medium 3a holds a living organism that exhibits a water purification action suitable for raw water. This organism is, for example, a microorganism such as a bacterium, yeast, protozoan, fungus, or algae. The raw water that is the target of water purification is collected and analyzed in advance, and an organism that performs biological treatment suitable for the raw water is appropriately selected. Yes. The living body only needs to have a water purifying action, and is preferably aerobic when backwashing described below is performed with ordinary air.

  The discharging means 4 has a function of discharging the water to be treated filtered by the filtering means 3 to the raw water area. The discharge means 4 includes a submersible pump P and a drain pipe 4a shared with the suction means 2. One end of the drainage pipe 4a is connected to the discharge side of the submersible pump P, and the other end is drawn to the outside of the water purification tank 1 so that the water to be treated can be discharged out of the water purification apparatus S. The discharge means 4 is disposed so that the water purification apparatus S maintains a stable posture even in water, and the posture of the water treatment apparatus S is not destroyed even when the water to be treated is drained, and also functions as a balance adjustment. The arrangement may be appropriately designed according to the configuration of the water purification apparatus S. For example, when the water purification treatment apparatus S of the present embodiment is almost balanced by another configuration, the submersible pump P is disposed near the center of the bottom 1a of the water purification tank 1, and the drain pipe 4a is a submersible pump. It is preferable to pull out vertically from P, branch into a plurality of parts in the middle, and arrange the branch destinations radially in a horizontal section. In this embodiment, the drain pipe 4a is branched into two, and the water to be treated is discharged in two directions, but the number of branch destinations may be three or more.

  The backwashing means 5 has a function of backwashing the filter medium 3a by discharging gas or liquid. The backwashing means 5 of the present embodiment discharges gas, and includes an air pump 5a, a suction side pipe 5b connected to the suction side of the air pump 5a, and a discharge side pipe connected to the discharge side of the air pump 5a. 5c. The suction port of the suction side pipe 5 b is drawn out of the water purification tank 1, and the discharge port of the discharge side pipe 5 c is arranged at an arbitrary location in the filter medium storage space 7. When the air pump 5a is driven, gas is sucked from the suction port of the suction side pipe 5b, discharged from the discharge port of the discharge side pipe 5c, and the filter medium 3a is aerated and backwashed. Since the discharged gas is directed upward, the discharge port is preferably disposed on the lower side of the filter medium storage space 7. A plurality of outlets may be arranged to backwash the filter medium 3a evenly.

  When the organism held in the filter medium 3a is aerobic, the gas discharged from the backwashing means 5 is preferably normal air. The suction port of the suction side pipe 5b is arranged in the atmosphere and used by taking in the atmosphere. It is sufficient if the atmosphere is normal air, but a configuration may be used in which a regulation gas adjusted to be suitable for a living organism is prepared, and the suction gas is connected to a gas cylinder containing the regulation gas and the regulation gas is used. Thereby, oxygen can be given to an aerobic organism while backwashing.

  A float part F is provided on the upper side of the water purification part C having these configurations. The float part F functions as a cap of the water purification unit C while air is stored in the inner space to provide buoyancy to the water purification apparatus S. This float part F is a substantially hemispherical frame that opens on one side, and is fitted and attached to the opening side of the water purification tank 1. The float part F is detachable, and when it is removed, it can be easily repaired or replaced inside the water purification part C. When attached, the upper part of the water purification part C is closed and the atmosphere in the inner space allows the water purification treatment apparatus S to close. Can give buoyancy.

(Usage mode)
This water purification apparatus S is used as follows. FIG. 5 is an explanatory diagram for explaining a usage mode of the water purification apparatus S. The water purification apparatus S is used floating in water in raw water areas such as rivers and lakes. When the water purification apparatus S is introduced into the raw water area, the water purification apparatus S floats at a depth that allows the water purification section C to be located below the water surface W due to the buoyancy of the float section F, and floats above the bottom K. . The entire water purification apparatus S may be submerged in water, or may be submerged to near the bottom K, and what level of water depth is positioned may be adjusted according to the condition of the raw water area. Float near the water surface W and gradually promote the water purification action from the shallow water area to the deep water area, so that the water purification process can proceed gently without causing odor in the air or polluting the water surface W with sludge. Also good. Moreover, the water purification apparatus S can be easily moved to the target place by floating in water, for example, can be moored with a wire (not shown).

  When the suction means 2 is driven, the water to be treated is sucked from the small hole 1 c of the water purification tank 1. When the submersible pump P that can be used underwater is used as the suction means 2, the suction power is smaller and the power consumption is lower than when the pump is placed outside the raw water area and the treated water is pumped outside the raw water area. Is achieved. The water to be treated sucked from the raw water area flows into the filter medium storage space 7, is filtered by the filter medium 3a, is sent to the drain pipe 4a by the submersible pump P, and is drained to the raw water area. In water, since the attenuation of drainage is small, it can be drained in a wide range compared to the conventional fountain system. Since the drain pipe 4a is radially arranged so as to maintain the stable posture of the water purification apparatus S, the posture of the water purification apparatus S is not tilted or swung even by water pressure due to drainage. Further, the bias of the filter medium 3a and the disorder of the arrangement of the intake pipe 5b of the backwashing means 5 are prevented. Filtrate remaining in the filter medium storage space 7 by filtration is biologically processed and decomposed by organisms held in the filter medium 3a. Living organisms continue to grow while decomposing organic matter in the filtrate.

  The water purification apparatus S performs backwashing by the backwashing means 5 at a predetermined timing. The timing of backwashing may be set as appropriate according to the conditions of the raw water area, but is approximately several times to a dozen times a day. In the present embodiment, the air is sucked from the suction port of the suction side pipe 5b and discharged from the discharge port of the discharge side pipe 5c by the operation of the air pump 5a. The exhausted air is back-washed by aeration of the filter medium 3a. By backwashing, excess organisms and deposits are separated from the filter medium 3a, and the filter medium 3a is prevented from being clogged, and the peeled organism is removed from the small hole 1c of the water purification tank 1 outside the water purification apparatus S, That is, it is discharged into the raw water area.

  In the raw water, sludge is biologically treated by the organisms discharged by backwashing. Thereby, the organic substance in water is decomposed | disassembled and the water purification process in the water of a raw | natural water area is accelerated | stimulated. In addition to the water purification treatment in the water purification apparatus S, the raw water area is subjected to water purification treatment by living organisms discharged from the water purification apparatus S, and a high water purification effect is obtained in combination with the treatment inside and outside the water purification treatment apparatus S. Moreover, since sludge etc. are sticky and have adhered to the raw | natural water area, it is hard to be attracted | sucked by the water purification apparatus S as it is. According to the water purification apparatus S, when the sludge adhering to the raw water area progresses due to the biological treatment of the discharged organisms, the sludge is weakened in the adhesive force and floats in the water and is sucked into the water purification apparatus S. It becomes easy. This cycle produces a synergistic effect and provides a very high water purification effect.

  When the organism is aerobic, the backwashing means 5 also functions as aeration for supplying oxygen to the organism held in the filter medium 3a. The organisms held in the filter medium 3a are exhausted by backwashing and become scarce, but at the same time, oxygen is supplied to promote the growth and the recovery of the water purification ability is accelerated. In the raw water area, oxygen is supplied by backwashing, the habitat of the organism is improved, and the water purification effect is further enhanced. The gas to be discharged is not limited to the atmosphere, and may be an oxygen-containing gas adjusted to be suitable for living organisms. In this case, a cylinder containing a preliminarily prepared oxygen-containing gas or oxygen-containing solution is prepared, and the intake port of the backwashing means 5 is connected. Note that the backwashing means 5 is not limited to discharging gas, and may be backwashed by discharging an oxygen-containing liquid in which oxygen is melted, for example.

  Moreover, when the granular material which has the pleat 3b on the surface is used as the filter medium 3a, it is effective in both the surface of biological holding and peeling. That is, at the time of backwashing, the gas or liquid discharged from the backwashing means 5 flows along the folds, and the propagated organisms can be efficiently separated from the filter medium 3a. In cases other than backwashing, even if the filter media 3a come into contact with each other, the organisms held between the pleats are not separated from the filter media 3a, and the organisms are stably held. Thereby, at the time of backwashing, the organism is efficiently discharged into the raw water area, the effect of the water purification treatment outside the water purification apparatus S is enhanced, and after the discharge, the growth of the organism is promoted between the folds, and the water purification treatment The biological treatment capacity in the apparatus S is quickly recovered, and a high water purification effect can be obtained by this cycle. Since the pleat 3b is formed by forming the filter medium 3a made of synthetic resin in a spiral shape, the specific surface area can be increased while being strong.

Example 1
Around the summer of last year, the water purification device S1 of the present invention was experimentally installed in an artificial river A (digging) in Osaka city to observe the state of water quality improvement. FIG. 6 is an appearance photograph of the water purification apparatus S1. The main body of this water purification apparatus S1 is made of reinforced plastic (FRP) and has a diameter of 1.4 m and a height of 0.9 m. FIG. 7 is a photograph in which the water purification apparatus S1 is placed on an artificial river (digging). The average depth of this artificial river (digging) is 2.5 m, and the depth of the accumulated sludge exceeds 0.3 m on average.

  In this water purifier S1, water absorption and drainage by the submersible pump P was continuously operated for 24 hours, and backwashing for taking in air was performed every 2 hours for 0.5 hours. The frequency of backwashing and the time of backwashing are designed (set) as appropriate depending on the degree of contamination in the raw water area and the size of the water source, but this time, the above design values are based on experience with garbage processing equipment. It was. Since the drainage by this submersible pump P can carry water up to about 15m ahead, if the water purification device S1 is installed on one side of an artificial river (digging), it is possible to circulate the water to the opposite shore. is there.

  FIG. 8 is a photograph of the water quality in the vicinity of the water purification apparatus S1. FIG. 8 (a) is a photograph immediately after the installation, where the river is dark green and the river is dark green and the water is completely invisible. 8 (b) and 8 (c) are photographs 45 days after the installation, and since the purified water has progressed and the river is clear, in FIG. 8 (b), the bottom of the purified water treatment device S1 in water is visible. In addition, in FIG. 8C, the figure of the fish swimming in the water is clearly visible. The depth of sludge deposited in this state was about 0.1 m on average, which was improved to 1/3 or less.

(Example 2)
From the end of the year before to the beginning of last year, three water purification treatment devices S1 of the present invention were experimentally installed on the artificial river B (digging) in Osaka city, and the change in the bottom topography was investigated. For convenience, these water purifiers will be described below as S1, S2, and S3. FIG. 9 is a top view showing a state where the water purification apparatuses S1, S2, and S3 are installed in the artificial river B. FIG. The artificial river B has revetments Wa and Wb on both sides, and the river water W flows in the direction of travel y (from the left side to the right side in FIG. 9). In the artificial river B, the bridge piers h11 to h32 of the elevated road are arranged, and the stagnation of the river water W is likely to occur. The water purification apparatuses S1, S2 and S3 are moored at a position of about 1 m from the revetment Wa toward the center of the river, and a part of the water purification apparatus is floated by the float part F (not shown). The distance L between the water purification devices S1 and S2, S2 and S3 is about 7 m. A line connecting water purification devices S1, S2 and S3 placed 1m inside from the revetment Wa (line shown by a one-dot chain line in FIG. 9) A1-A1 line cross section was measured and the cross section was observed (FIG. 10). . In addition, the bottom surface of the A2-A2 cross section parallel to the A1-A1 line and 2 m inside from the revetment Wa was measured to observe the cross section (FIG. 11). Furthermore, the water bottom topography in the A3-A3 cross section parallel to the A1-A1 line and 3 m inside from the revetment Wa was measured, and the cross section was observed (FIG. 11). FIG. 10 is a cross-sectional view of the bottom terrain obtained by measuring the cross-section of the bottom of the A1-A1 line in FIG. 9 and observing the cross section. FIG. 10 (a) is a cross-sectional view of the bottom terrain before the installation of the apparatus. b) is a bottom terrain sectional view immediately after installation, FIG. 10 (c) is a bottom terrain sectional view one week after installation, and FIG. 10 (d) is a bottom terrain sectional view three weeks after installation. FIG. 10 (e) is a sectional view of the bottom of the bottom 7 weeks after installation, and FIG. 10 (f) is a sectional view of the bottom of the bottom 3 weeks after the device is removed. FIG. 11 is a cross-sectional view of the water bottom topography obtained by measuring the water bottom topography in the cross section along line A2-A2 of FIG. 12 is a cross-sectional view of the water bottom topography obtained by measuring the water bottom topography in the cross section along line A3-A3 in FIG. 9 and observing the cross section at the same time as FIG.

FIG. 10A is a sectional view of the bottom of the water before the device is installed. The vertical axis of the bottom terrain sectional view represents the water depth, and the horizontal axis represents the A1-A1 line. The scale at the top of the horizontal axis is set at 1 m intervals. In the figure, the pier h21 is indicated by a dotted line as a position guide. The bottom topographic cross-sectional views are displayed in order of river water W, slurry-like fluid mud (sludge) K1 (displayed in dark color), and sedimented mud K2 (displayed in light color) from the top. Liquidity mud (sludge) K1 is a mud layer of density ρ is 1.2~1.4 (g / cm ^3), sediments K2 has a density ρ of 1.4 or more (g / cm ³⁾ Is a layer.

  In order to show the topographical profile of the bottom, the bottom sediment density is measured with an RI cone (Radio Isotope Cone), and the position of the deposited mud K2 is determined by the amount of thread fed to the search weight created based on the measurement result. It was measured. Moreover, the position of fluid mud (sludge) K1 was measured with the acoustic sounding instrument of frequency 200kHz.

  In the bottom topographical sectional view (FIG. 10 (a)) before the water purification apparatus S1, S2, S3 is installed, the thickness of the fluid mud (sludge) K1 is about 1 m, but the water purification apparatuses S1, S2, S3. In the bottom topographic cross-sectional view one week after installation (Fig. 10 (c)), the thickness of the fluid mud (sludge) K1 is reduced from 1/2 to 1/3 of the initial level, and further, as time passes. A decrease in the thickness of the fluid mud (sludge) K1 layer is observed (FIG. 10 (d), FIG. 10 (e)). The decreasing tendency of the thickness of the fluid mud (sludge) K1 in FIG. 10 is the same in FIG. 11 and FIG. On the other hand, in the bottom topographic cross-sectional view after 3 weeks from the removal of the water purification devices S1, S2, S3, it seems that the thickness of the fluid mud (sludge) K1 layer is slightly increased compared to before the removal of the device ( FIG. 10 (f) and the like). From this, it has confirmed that the thickness of the layer of fluid mud (sludge) K1 decreased in the wide range by the water purification effect | action of water purification apparatus S1, S2, S3.

  The water purification apparatus of the present invention is suitable for use in rivers, lakes and the like, but is applicable to artificial environments such as aquarium fish and aquaculture fish breeding tanks, and water purification in various environments. The present invention can also be applied as a bacterial culture apparatus. Thus, it goes without saying that the present invention can be modified as appropriate without departing from the spirit of the present invention.

It is a front view which shows the internal structure of the water purification apparatus of one embodiment of this invention. It is a top view which shows the internal structure of the water purification apparatus of the said embodiment. It is a perspective view which shows the internal structure of the water purification apparatus of the said embodiment. It is a perspective view of the filter medium which has a pleat on the surface. It is explanatory drawing explaining the usage condition of the water purification apparatus of one embodiment of this invention. It is an external appearance photograph which shows the external appearance of the water purification apparatus of one embodiment of this invention. It is an external appearance photograph which shows the state which installed the water purifier of the said embodiment in the artificial river A. It is the external appearance photograph which observed the water quality of the water purification treatment apparatus vicinity of the said embodiment, FIG.8 (a) is an external appearance photograph immediately after installation, FIG.8 (b), (c) is 45 days after installation. It is an appearance photograph. It is a top view which shows the state which installed the water purification apparatus of the said embodiment in the artificial river B. FIG. 10A is a cross-sectional view of the water bottom topography obtained by measuring the cross-section of the water bottom at the A1-A1 line cross section of FIG. 9; FIG. 10A is a cross-sectional view of the water bottom topography before the device is installed; FIG. FIG. 10C is a cross-sectional view of the water bottom terrain immediately after the installation, FIG. 10D is a cross-sectional view of the water terrain after 3 weeks from the installation, and FIG. e) is a sectional view of the bottom of the bottom 7 weeks after the installation, and FIG. 10 (f) is a sectional view of the bottom of the bottom 3 weeks after the device is removed. FIG. 11 is a cross-sectional view of the water bottom topography obtained by measuring the water bottom topography in the cross section along line A2-A2 of FIG. 12 is a cross-sectional view of the water bottom topography obtained by measuring the water bottom topography in the cross section along line A3-A3 in FIG. 9 and observing the cross section at the same time as FIG.

Explanation of symbols

S S1 S2 S3 Water purification device, C water purification unit, F float unit,
DESCRIPTION OF SYMBOLS 1 Water purification tank, 1a Bottom part of water purification tank, 1b Side part of water purification tank, 1c Hole of water purification tank,
2 suction means, P submersible pump,
3 Filtration means, 3a filter material, 3b pleats on the surface of the filter material,
4 Discharge means, 4a Drain pipe,
5 Backwashing means, 5a Air pump, 5b Suction side piping, 5c Discharge side piping,
6 storage container, 6a hole of storage container,
7 Filter material storage space,
W river water, Wa Wb revetment, W1 water surface,
K water bottom, K1 fluid mud (sludge), K2 sediment mud,

Claims (4)

A suction means for sucking water to be treated from a water purification tank disposed in a raw water area such as a river or a lake, and a filter for filtering the water to be treated sucked by the suction means and aerobic organisms held on the filter medium. A filtering means for biological treatment; a discharging means for discharging the water to be treated filtered by the filtering means; and a backwashing means for backwashing the filtering material of the filtering means that is disposed in the filtering material storage space and takes in the atmosphere. And
Said filtering means and the discharge detecting means is housed in the water purification tank of cylindrical shape, said discharge means, horizontal water purification tank drain pipe cylindrical shape having a flow path for treated water filtered by the filtering means It is arranged radially in cross section, and the treated water in the raw water area flows from a small hole provided in the side surface of the water purification tank, is filtered by the filtering means, and then passes through the hole of the storage container. It flows into the storage container, is sucked by the suction means provided in the storage container, and is discharged into the water of the raw water area by the drain pipe, and from the filter medium by backwashing by the backwashing means A water purification apparatus, which exfoliates aerobic organisms and supplies oxygen to the aerobic organisms and discharges them into the raw water area.   The water purification apparatus according to claim 1, wherein the timing of backwashing by the backwashing means is set from several times to a dozen times a day. A plurality of outlets of an air pump provided in the backwashing means are arranged below the storage space in which the filter medium is stored, and the filter medium is provided with a plurality of granules having pleats on the surface. The water purification apparatus according to claim 2, wherein A hemispherical float for use in floating in a river or lake is detachably fitted to the upper part of the water purification tank, and a submersible pump provided in the suction means is provided at the bottom of the water purification tank. The water purification apparatus according to claim 1, wherein the water purification apparatus is disposed near the center of the water.

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