JP2004344736A - Water cleaning method, and water cleaning apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water cleaning method and a water cleaning apparatus advantageous to the reproduction of mold and capable of cleaning water with mold. <P>SOLUTION: Carriers 8A and 8C carrying mold 7A and mold 7C, and vessels 3 and 4 holding the water to be cleaned are prepared. The mold 7A and mold 7C carried on the carriers 8A and 8C are reproduced by holding at least a part of the carriers 8A and 8C in a region supplied with air and water. Water in the vessels 3 and 4 is cleaned by the cleaning action of the mold 7a and mold 7C. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a water purification method and a water purification device.
[0002]
[Prior art]
In recent years, it has been required to effectively purify water such as groundwater. Patent Literature 1 discloses an oil / water separation tank that separates oil and water from polluted water, a first purification tank equipped with a filtering material that purifies polluted water from which oil has been separated, and water purified by the first purification tank. Further, there is disclosed a polluted water purification apparatus having a second purification tank in which useful microorganisms to be purified are propagated. According to this, polluted water can be efficiently purified by useful microorganisms.
[0003]
Patent Literature 2 discloses a water treatment apparatus that includes a tank that stores water to be purified, a floating body that floats in the water of the tank, and an adsorbent that is provided in the floating body and that is exposed to water. According to this, the floating body floating on the water surface moves without relying on the driving force, so that the floating substance such as oil floating on the water surface is adsorbed and removed by the adsorbent of the floating body.
[0004]
[Patent Document 1] JP-A-2002-102890
[Patent Document 2] JP-A-10-328655
[0005]
[Problems to be solved by the invention]
Further, in the industry, there is a demand for a water purification method and a water purification apparatus capable of purifying water such as groundwater more efficiently. The present invention has been made in view of the above-described circumstances, and has an object to provide a water purification method and a water purification apparatus that are advantageous for the propagation of molds and can purify water with molds. is there.
[0006]
[Means for Solving the Problems]
The water purification method according to the present invention comprises a step of preparing a carrier supporting molds and a container holding water to be purified, and holding at least a part of the carrier in an area where air and water are supplied. By doing so, the mold carried on the carrier is propagated, and the step of purifying the water in the container with the mold is carried out.
[0007]
The water purification device according to the present invention includes a container that holds water to be purified, and a carrier holding unit that holds at least a part of a carrier carrying molds in a region where air and water are supplied. In addition, the present invention is characterized in that molds carried on a carrier are propagated and water in a container is purified by the molds.
[0008]
ADVANTAGE OF THE INVENTION According to the water purification method and the water purification apparatus according to the present invention, at least a part of the carrier supporting the molds is held in an area to which air and water are supplied. Therefore, molds carried on the carrier can come into contact with air and water, and the molds propagate on the carrier. It is presumed that when molds proliferate, the degradation enzymes are secreted from the molds and the degradation enzymes flow out into the water in the container, so that the water containing the environmentally hazardous substance held in the container is purified.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Molds generally require water, air, and nutrients to propagate. As the nutrient, a substance contained in the water to be purified or a substance constituting the carrier can be used. According to the present invention, at least a part of the carrier supporting the molds is held in an area where air and water are supplied. Therefore, the propagation of mold progresses in the carrier. Here, the area to which air and water are supplied in the present invention is an area to which both air and water are supplied, and a form in which air and water are supplied at the same time and a form in which air and water are supplied at different times. Including. The water may be liquid water or gaseous water (steam). Therefore, as the area to which air and water are supplied in the present invention, an air-water boundary area on the surface of water in the container can be exemplified. In the vicinity of the water surface of the water in the container, the air on the water surface and the water (liquid water or gaseous water) from the water surface are efficiently present, which is advantageous for mold propagation. . In the vicinity of the water surface of the water in the container, a large amount of gaseous water evaporating from the water surface is present, and the humidity is relatively higher than that of the portion separated from the water surface, which is effective for the propagation of mold.
[0010]
Further, as the area to which the air and water are supplied in the present invention, an air / water supply area near the water surface of the container and above the water surface can be exemplified. The region above the water surface of the water in the container is advantageous for the propagation of molds because there is considerable gaseous water evaporated from the water surface in addition to the air on the water surface. In this case, the area to which air and water are supplied can be an upper area within 40 cm from the water surface of the container in a stationary state, or an upper area within 30 cm from the water surface. In this region, the amount of gaseous water evaporated from the water surface of the container is increasing, and the humidity is high.
[0011]
In the present invention, the region to which the air and water are supplied is substantially higher than the surface of the water in the container, but water is applied to the carrier by a shower device arranged above or beside the carrier. An example of a region in which the image can be formed can be used. In this case, water can be applied to the carrier by a shower device periodically or irregularly.
[0012]
The carrier carried by molds may be any carrier capable of carrying molds, but is preferably a porous body having a large number of pores. The porous body may be any of an organic porous body and an inorganic porous body. Examples of the porous body include at least one of activated carbon, zeolite, sepiolite, laphrinite, attapulgite, and the like, and further, a wood material such as sawdust. Substances such as environmentally harmful substances contained in the water to be purified are more likely to be trapped in the pores of the porous body, which is advantageous for propagating molds using these substances as nutrients. It is preferable that the carrier is held by a carrier holding portion in order to prevent the carrier from scattering. Examples of the carrier holding portion include a basket, a case, a mesh container, and the like.
[0013]
As fungi, rot fungi can be exemplified. Examples of the rot fungi include white rot fungi, brown rot fungi, and soft rot fungi. Other molds include filamentous fungi such as Aspergillus, Penicillium, Rhizopus, Mucor, and Trichoderma. According to literatures, it is said that white rot fungi can decompose environmental load substances such as dioxin, DDT, and PCB. In addition, filamentous fungi such as Aspergillus and Penicillium are starches that are not easily decomposed by bacteria, filamentous fungi such as Penicillium, Rhizopus, and Mucor are natural oils and fats, and filamentous fungi such as Aspergillus and Trichoderma are cellulose. Is said to be strongly decomposed.
[0014]
According to the present invention, at least one of the container and the carrier holding unit forms at least a part of the carrier holding unit with an air-water boundary region on the water surface of the container, or higher than the water surface of the container. It is preferable to have a holding portion for holding the air / water supply region above. This is advantageous for holding at least a part of the carrier supporting the molds in a region where air and water are supplied. As the above-mentioned holding portion, one having a function of engaging the carrier holding portion with a water holding container can be adopted, and a detachable hook or the like can be exemplified.
[0015]
Further, according to the present invention, a system in which the carrier holding portion is floated on the surface of water with a float can be adopted. In this case, the carrier holding unit may have a float for floating the carrier holding unit on the surface of the water in the container. Due to the floating action of the float, the carrier holding part holding the carrier carrying the molds floats on the water surface of the container, so that at least a part of the carrier carrying the molds is converted into air / water at the water surface of the container. This is advantageous for holding in a water boundary region or an air / water supply region above the level of water in the container. Examples of the above-mentioned float include a method of enclosing air, a foam having a specific gravity smaller than that of water, and the like.
[0016]
According to the present invention, a mode in which the water in the container is further purified by bacteria supported on the second carrier immersed in the water of the container can be adopted. Therefore, according to the apparatus of the present invention, a mode in which the second carrier holding portion for holding the second carrier carrying bacteria is provided in the container can be exemplified. Bacteria are generally single cells and multiply by cell division. As described above, if the bacteria supported on the second carrier immersed in the water of the container are propagated, the water in the container can be further purified by the bacteria. Since the action of molds to purify water and the action of bacteria to purify water are not the same, a combined purification action of mold and bacteria can be expected. Examples of the bacteria include bacteria such as Pseudomonas, Alcaligenes, Flavobacterium, Bacillus, Escherichia, Achromobacter, Agrobacterium, Paracoccus, and Thiobacillus.
[0017]
According to the present invention, a flow path regulating member that regulates a flow path of water so that water flows through a carrier that holds molds while being held by a carrier holding unit is provided in at least one of the carrier holding unit and the container. Can be exemplified. As a result, the purification efficiency can be further increased. In addition, a flow path regulating member that regulates a flow path of water so that water flows through the second carrier that holds bacteria while being held by the second carrier holding part may include at least one of the second carrier holding part and the container. A form provided on one side can be exemplified. As a result, the purification efficiency can be further increased.
[0018]
Further, according to the present invention, it is possible to exemplify a mode in which a carrier holding portion for holding a carrier carrying molds is provided relatively upstream in a flow path of water. This is advantageous in that the degrading enzyme secreted from the mold is supplied to the downstream side to increase the water purification efficiency in the entire flow channel. When a porous body is provided on the downstream side of molds, it is expected that the pores of the porous body carry the degrading enzyme.
[0019]
For example, it is possible to provide a carrier holding portion for holding a carrier carrying molds relatively upstream in a flow path of water, from a second carrier holding portion for holding a second carrier carrying bacteria. it can.
[0020]
Further, according to the present invention, when water flows upward in the container, the second carrier holding portion holding the second carrier carrying the bacteria is more water than the carrier holding portion holding the carrier carrying the molds. Can be provided relatively downstream in the flow path through which the fluid flows. This is because a carrier carrying molds is arranged near the water surface in the container.
[0021]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. The water purification apparatus according to the present embodiment purifies water to be purified containing environmentally hazardous substances such as oil (mineral oil, oil and fat, etc.). As shown in FIG. 2, a first purification tank 3 disposed downstream of the oil-water separation tank 2 and holding water to be purified, and a container disposed downstream of the first purification tank 3 and holding water to be purified. And the second septic tank 4. The oil / water separation tank 2, the first purification tank 3, and the second purification tank 4 are provided on the base 1, respectively. The base 1 has a hanging tool 1a for hanging the base 1.
[0022]
As shown in FIG. 1, the oil / water separation tank 2 is for roughly purifying oil contained in water to be purified, and includes a separation chamber 20 for holding water to be purified, and a separation chamber. 20, a float type water level detecting means 21 floating in the water to be purified, a first inlet 22, a first outlet 23, and a surface WA of the water to be purified held in the separation chamber 20. And a float funnel 29 that floats on the surface. The water level of the water to be purified in the separation chamber 20 is detected by the water level detecting means 21. The detection signal is input to the control circuit 25. The control circuit 25 controls the driving of the pump 27 functioning as a pumping means. Thus, the water level WA of the water to be purified held in the separation chamber 20 is controlled to be integrated.
[0023]
As shown in FIG. 1, the water supply pipe 26 is connected to a water source 6 in which water to be purified is stored, and is connected to a first inlet 22 of the oil / water separation tank 2 via a pump 27 for pumping water. It is connected. The first outlet 23 of the oil / water separation tank 2 is connected to the oil storage tank 5 via an oil drain pipe 28. The oil storage tank 5 is disposed on the base 1 so as to be located below the oil / water separation tank 2.
[0024]
The float funnel 29 mounted on the oil / water separation tank 2 separates the floating oil 29 a floating on the water surface WA of the water in the separation chamber 20 of the oil / water separation tank 2. The float funnel 29 has a funnel hole 29b capable of capturing the floating oil 29a floating on the water surface WA, and a communication passage 29c connected from the funnel hole 29b to the first outlet 23. The floating oil 29a floating on the water surface WA of the separation chamber 20 is captured by the funnel hole 29b, and further discharged through the communication passage 29c, the first outlet 23, and the oil drain pipe 28 toward the oil storage tank 5. You. An on-off valve 50 is provided in the oil storage tank 5. When the on-off valve 50 is opened, the oil in the oil storage tank 5 is discharged to the outside of the oil storage tank 5.
[0025]
As shown in FIG. 1, the first purification tank 3 is mounted on the mounting surface 10 of the base 1, and includes a first purification chamber 30, an inlet 31 provided above the first purification chamber 30, and a first purification chamber. 30 and an outlet 32 provided at a lower portion of the outlet 30. The inlet 31 of the first septic tank 3 is connected to the second outlet 24 of the oil / water separation tank 2 via an intermediate pipe 34. Further, the intermediate pipe 34 is provided with an oil droplet removal filter 33 and a flow rate adjustment valve 35. The oil droplet removing filter 33 captures an oil component of water flowing through the intermediate pipe 34. The flow rate adjustment valve 35 functions as a control valve that adjusts the flow rate of water flowing through the intermediate pipe 34 according to the height of the water surface W1 of the first purification chamber 30 of the first purification tank 3. Therefore, the height of the water surface W1 of the first purification chamber 30 is kept constant. When the flow control valve 35 is opened, the water in the oil / water separation tank 2 flows to the first purification tank 3 via the intermediate pipe 34. When the flow control valve 35 is closed, the water in the oil / water separation tank 2 does not flow to the first purification tank 3 via the intermediate pipe 34.
[0026]
As shown in FIG. 1, a cage-shaped carrier holding portion 9 </ b> A is provided in the first purification chamber 30 in the first purification chamber 30 of the first purification tank 3. The carrier holding unit 9A is detachable from the first purification chamber 30, and holds a carrier 8A that carries molds 7A as useful microorganisms. As shown in FIG. 2, the carrier holding unit 9 </ b> A includes a cage-shaped carrier accommodation unit 91 that accommodates a granular carrier 8 </ b> A carrying molds 7 </ b> A, and a cage-shaped carrier accommodation unit 91. The float 92 has a float 92 functioning as a buoyancy generating unit that floats on the water surface W1, and a ring-shaped flow path regulating member 93 that makes one round along the outer circumferential surface of the cage-shaped carrier accommodating portion 91 in the circumferential direction.
[0027]
As shown in FIG. 3, the peripheral wall of the carrier accommodating portion 91 of the carrier holding portion 9A has water permeability. That is, the peripheral wall of the carrier accommodating portion 91 has a large number of communication ports 94 for water communication that communicates the inside and the outside of the carrier accommodating portion 91. A mesh member 95 having meshes 95x having water permeability is provided on the lower surface and the upper surface of the carrier accommodating portion 91. As described above, since the carrier holding portion 9A has water permeability, the carrier 8A and the molds 7A held by the carrier holding portion 9A can be exposed to water.
[0028]
According to the present embodiment, as shown in FIG. 2, the carrier holding portion 9 </ b> A floats on the water surface W <b> 1 of the water in the first purification chamber 30 due to the buoyancy of the float 92. Therefore, the mold 7A carried on the carrier 8A of the carrier holding portion 9A can effectively contact the water in the first purification chamber 30 and the air above the water surface W1 of the first purification chamber 30. , Can be propagated efficiently. That is, the molds 7A carried on the carrier 8A can exist on the water surface W1 in the first septic tank 3 in a gas-liquid boundary region (air-water boundary region) which is a boundary between air and water. Class 7A propagates, and the amount of the degrading enzyme secreted from mold 7A is secured. Since this degrading enzyme flows out into the first septic tank 3 and further into the second septic tank 4 located downstream thereof, the degrading enzyme is used as an environmentally hazardous substance contained in the water in the first septic tank 3 and the water in the second septic tank 4. The contained environmentally harmful substances are effectively purified.
[0029]
The above-described gas-liquid boundary region (air-water boundary region) corresponds to a region to which both air and water are supplied. Representative molds 7A include white rot fungi. White rot fungi are easy to propagate in the gas-liquid boundary region. When the white rot fungus grows, the secretion amount of a degrading enzyme having a high purification ability for environmental load substances increases. The carrier 8A described above may be any carrier that can support the molds 7A, but is preferably a porous body having a large number of pores.
[0030]
According to the present embodiment, as shown in FIG. 2, the flow path regulating member 93 that makes one round along the circumferential direction on the outer peripheral surface of the cage-shaped carrier accommodating portion 91 is provided. The flow path regulating member 93 has a ring shape and is disposed in a gap 30x between the outer peripheral surface of the carrier accommodating portion 91 and the inner wall surface of the first purification chamber 30 of the first purification tank 3. As a result, the flow path regulating member 93 has a function of restricting the passage of water through the flow path of the gap 30x. For this reason, the probability that the water flowing in the first purification chamber 30 of the first purification tank 3 will pass through the carrier 8A in the carrier accommodating portion 91 can be increased, and the purification efficiency can be increased. In FIG. 3, the float 92 and the flow path regulating member 93 are omitted.
[0031]
The flow path regulating member 93 is formed on the outer peripheral surface of the cage-shaped carrier accommodating portion 91, but is not limited to this, and may be provided on the inner wall surface of the first purification chamber 30 of the first purification tank 3 in some cases. May be. Further, the flow path regulating member 93 has a ring shape along the circumferential direction of the carrier accommodating portion 91, but may be provided intermittently along the circumferential direction of the carrier accommodating portion 91.
[0032]
As shown in FIG. 1, a cage-shaped second carrier holding portion 9 </ b> B is held in the first purification chamber 30 in the first purification chamber 30 of the first purification tank 3. The second carrier holding unit 9B holds a second carrier 8B that supports bacteria 7B as useful microorganisms. When the bacteria 7B propagate, the secretion amount of a degrading enzyme having a high purification ability for environmental load substances increases.
The bacteria 7B supported on the second carrier 8B can be propagated by the dissolved air contained in the water or require oxygen if present in the water without directly contacting the air. It is a microorganism that can reproduce without breeding. Examples of the bacteria 7B include soil bacteria and activated sludge bacteria. The bacteria 7B propagate as nutrients using substances contained in the water to be purified.
[0033]
As shown in FIG. 5, a claw-shaped engaged part 9m is formed as a holding part on the second carrier holding part 9B. A hook-shaped engaging portion 39B for detachably engaging the claw-shaped engaged portion 9m of the second carrier holding portion 9B with the first purification tank 3 is provided in the first purification tank 3 as a holding portion. With the cage-shaped second carrier holding portion 9B engaged with the engaging portion 39B of the first septic tank 3, the cage-shaped second carrier holding portion 9B is immersed in the water in the first septic tank 3. Therefore, the second carrier 8B held by the second carrier holding portion 9B is immersed in the water in the first septic tank 3.
[0034]
As shown in FIG. 5, a mesh member 96 having a mesh 96x having water permeability is provided on the lower surface and the upper surface of the second carrier holding portion 9B. As described above, since the second carrier holding portion 9B has water permeability, the second carrier 8B and the bacteria 7B held by the second carrier holding portion 9B can be exposed to water. The above-mentioned second carrier 8B may be any as long as it can support bacteria 7B, but is preferably a porous body having a large number of pores (for example, activated carbon).
[0035]
According to the present embodiment, as can be understood from FIG. 1, the carrier 8A carrying the molds 7A that require high contact with air is placed in the first purification chamber 30 of the first purification tank 3. The second carrier 8B, which is disposed relatively on the upper side and carries the bacteria 7B that does not require much contact with air and can propagate with dissolved air, is provided in the first purification chamber 30 of the first purification tank 3. In the lower part. As described above, since the molds 7A and the bacteria 7B are breeding in the first septic tank 3, in the first septic tank 3, the combination of the action of the mold 7A for purifying water and the action of the bacteria 7B for purifying water is combined. A purifying action can be expected.
[0036]
According to this embodiment, as shown in FIG. 1, in the first septic tank 3, the height position of the inlet 31 is provided above the outlet 32, so that water to be purified is basically Flows downward (in the direction of arrow D1) from the upper part to the lower part of the first septic tank 3. In this case, when oil in the water in the first septic tank 3 is present, the oil having a low specific gravity tends to float on the water surface W1 of the first septic tank 3. The mold 7A carried on the carrier 8A is disposed relatively upward in the first purification chamber 30 and exists near the water surface W1 of the first purification tank 3, so that the water surface of the first purification tank 3 It is possible to contribute to efficiently purify floating substances such as oils floating on W1 by the molds 7A near the water surface W1.
[0037]
In addition, as shown in FIG. 1, an air diffuser 37 is provided at the bottom of the first purification chamber 30 of the first purification tank 3. A fan 38 functioning as air supply means is connected to the air diffuser 37. If the bacteria 7B require air, the fan 38 is driven as necessary to supply air to the water in the first purification chamber 30 of the first purification tank 3 via the diffuser 37 (explosion). Qi operation). Thereby, the amount of dissolved air in the water in the first purification chamber 30 increases, which can contribute to the propagation of the bacteria 7B in the first purification chamber 30. If the amount of dissolved air in the water in the first purification chamber 30 increases, it is advantageous for the propagation of the mold 7A.
[0038]
As shown in FIG. 1, the second septic tank 4 is mounted on the mounting surface 10 of the base 1 independently of the first septic tank 3. The second purification tank 4 has a second purification chamber 40, an inlet 41 provided below the second purification chamber 40, and an outlet 42 provided above the second purification chamber 40. An inlet 41 of the second septic tank 4 is connected to an outlet 32 of the first septic tank 3 via an intermediate pipe 43. As shown in FIG. 1, the intermediate pipe 43 is provided with a flow control valve 44 as a control valve that can be opened and closed. When the flow control valve 44 is opened, the water purified in the first purification tank 3 flows to the second purification tank 4 via the intermediate pipe 43. When the flow control valve 44 is closed, water in the first septic tank 3 does not flow to the second septic tank 4 via the intermediate pipe 43.
[0039]
As shown in FIG. 1, the outlet 42 of the second septic tank 4 is located above the inlet 41 of the second septic tank 4 and is connected to a water discharge pipe 46 having a water outlet 47. Therefore, according to the second purification chamber 40 of the second purification tank 4, the water is basically set to flow upward (in the direction of the arrow U1) from the lower part to the upper part. As a result, the drift of water flowing in the second purification chamber 40 of the second purification tank 4 is suppressed, which is advantageous for suppressing the variation in the propagation of molds and bacteria in the second purification chamber 40.
[0040]
FIG. 6 shows the inside of the second septic tank 4. As shown in FIG. 6, a cage-shaped carrier holding portion 9C is provided in the second purification chamber 40 of the second purification tank 4. The carrier holding unit 9C holds a granular carrier 8C that supports molds 7C as useful microorganisms. Further, as shown in FIG. 6, a claw-shaped locked portion 9m is formed as a holding portion on the carrier holding portion 9C. Further, as shown in FIG. 6, a hook-shaped engaging portion 39 </ b> C for detachably engaging the claw-shaped locked portion 9 m is provided on the inner wall of the second septic tank 4 as a holding portion. As shown in FIG. 6, when the claw-shaped locked portion 9m of the cage-shaped carrier holding portion 9C is engaged with the engaging portion 39C of the second septic tank 4, the cage-shaped carrier holding portion 9C is held in the cage-shaped carrier holding portion 9C. At least a part of the carrier 8 </ b> C that is used is held near the water surface W <b> 2 of the water in the second septic tank 4. Therefore, at least a part of the carrier 8C held in the cage-shaped carrier holding portion 9C is held above the height position h2 of the lower end of the outlet 42 of the second purification tank 4. For this reason, the molds 7C carried on the carrier 8C can exist in the gas-liquid boundary region, which is the boundary between the air and the water, near the water surface W2 of the water in the second purification tank 4, and the water in the second purification tank 4 Of the water surface W2, and the air above the water surface W2. Therefore, the molds 7C of the second septic tank 4 are activated and propagated by the water and the air above the water surface W2. The degrading enzyme secreted from the mold 7C flows out into the water in the second septic tank 4. For this reason, the environmentally hazardous substances contained in the water in the second purification tank 4 can be removed, and the water to be purified can be effectively purified. The gas-liquid boundary region described above corresponds to a region to which air and water are supplied.
[0041]
In addition, as a typical mold 7C, white rot fungus is illustrated similarly to the mold 7A. The carrier 8C that supports the mold 7C may be any carrier that can support the mold 7C, but is preferably a porous body having a large number of pores.
[0042]
As shown in FIG. 6, the cage-shaped carrier holding portion 9C is provided with a flow path regulating member 93 that makes one round along the outer peripheral surface thereof in the circumferential direction. The flow path regulating member 93 has a ring shape, and is disposed in a gap 40x between the outer peripheral surface of the carrier holding portion 9C and the inner wall surface of the second purification tank 4. As a result, the flow path regulating member 93 has a function of restricting the passage of water through the flow path of the gap 40x. Therefore, it is possible to increase the probability that water flowing in the second purification tank 4 in the direction of the arrow U1 passes through the carrier 8C in the carrier holding unit 9C, which is advantageous for water purification.
[0043]
FIG. 4 shows the carrier holding section 9C described above. As shown in FIG. 4, the peripheral wall of the carrier accommodating portion 91 of the carrier holding portion 9C has water permeability. That is, the peripheral wall of the carrier accommodating portion 91 of the carrier holding portion 9C has a large number of communication ports 94 for water passage for communicating the inside and outside of the carrier accommodating portion 91. A mesh member 95 having meshes 95x having water permeability is provided on the lower surface and the upper surface of the carrier holding portion 9C. As described above, since the carrier holding portion 9C has water permeability, the carrier 8C and the molds 7C held by the carrier holding portion 9C can be exposed to water. In FIG. 4, the float 92, the flow path regulating member 93, and the like are omitted.
[0044]
According to the present embodiment, as shown in FIG. 6, a cage-shaped second carrier holding portion 9 </ b> D is provided in a lower portion of the second purification chamber 4 in the second purification chamber 40. The second carrier holding unit 9D holds a second carrier 8D that supports bacteria 7D as useful microorganisms. As shown in FIG. 6, a mesh member 97 having a mesh 97y having water permeability is provided on the lower surface and the upper surface of the second carrier holding portion 9D. As described above, since the second carrier holding portion 9D has water permeability, the second carrier 8D and the bacteria 7D held by the second carrier holding portion 9D can be exposed to water.
[0045]
The cage-shaped second carrier holding portion 9D has a structure similar to that of the above-described second carrier holding portion 9B so as to be engaged with and held on the inner wall of the second septic tank 4. Examples of the bacteria 7D include soil bacteria and activated sludge bacteria. The second carrier 8D that carries the bacteria 7D may be any carrier that can carry the bacteria 7D, but is preferably a porous body having a large number of pores. In this case, a substance such as an environmentally hazardous substance contained in the water to be purified is easily captured by the pores of the porous body, and the substance is used as a nutrient to propagate molds 7A, 7C and bacteria 7B, 7D. It is advantageous for
[0046]
According to the second septic tank 4 according to the present embodiment, the molds 7C that require high contact with the air are disposed relatively upward in the second purification chamber 40 of the second septic tank 4. The bacteria 7D, which does not require much contact with air, are disposed relatively lower in the second purification chamber 40 of the second purification tank 4.
[0047]
As shown in FIG. 1, the height position of the lower end of the outlet 42 of the second septic tank 4 is indicated by h2. Considering that the water held in the second septic tank 4 is discharged from the water outlet 47 of the water spouting pipe 46, the water surface W2 of the water held in the second septic tank 4 is basically at the height position h2. It can be said that it corresponds to. Therefore, when the height of the water surface W2 of the water held in the second septic tank 4 is higher than the height position h2 of the lower end of the outlet 42 of the second septic tank 4, the inside of the second purification chamber 40 of the second septic tank 4 is set. Water is automatically discharged from a water discharge port 47 of a water discharge pipe 46.
[0048]
Now, a case where the water purification device according to the present embodiment is used will be described. When the pump 27 is driven, the water to be purified stored in the water source 6 is supplied to the oil / water separation tank 2 through the water feeder 26 and the first inlet 22, and the oil component and the water are separated by the oil / water separation tank 2. It is roughly divided into components. The oil component is discharged to the oil storage tank 5. The water component in the oil / water separation tank 2 is supplied into the first purification tank 3 after the oil component is further removed by the oil droplet removal filter 33. Then, the water to be purified supplied into the first purification tank 3 is purified by the purifying action of the molds 7A carried on the carrier 8A and the purifying action of the bacteria 7B carried on the second carrier 8B.
[0049]
Further, the water purified in the first purification tank 3 is supplied into the second purification tank 4 via the flow control valve 44. The water supplied into the second septic tank 4 is purified by bacteria 7D carried on the second carrier 8D in the cage-shaped second carrier holding portion 9D disposed in the second septic tank 4, and the cage shape is used. Is purified by the purifying action of the mold 7C carried on the carrier 8C in the carrier holding portion 9C. The water purified in the second purification tank 4 is discharged as purified water from a water discharge port 47 of a water discharge pipe 46.
[0050]
According to this embodiment, if the water surface of the oil / water separation tank 2 is WA, the water surface of the first purification tank 3 is W1, and the water surface of the second purification tank 4 is W2, the water surface WA of the oil / water separation tank 2 depends on the height. In order to use the water pressure, the relationship is set such that WA height> W1 height> W2 height. Further, the height of the upper end W4 of the intermediate pipe 34 is set so as to satisfy the relationship of WA height> W4 height. Therefore, if the water to be purified is held in the oil / water separation tank 2 by driving the pump 27, the height of the water surface WA of the oil / water separation tank 2 increases, and the water head pressure by the water surface WA of the oil / water separation tank 2 is used. Then, the water in the oil / water separation tank 2 is automatically discharged toward the first purification tank 3 and the second purification tank 4, and further automatically discharged from the water discharge port 47 of the water discharge pipe 46.
[0051]
According to the present embodiment, after the water to be purified is roughly separated into water and oil by the oil / water separation tank 2, the water from which the oil has been separated to some extent is subjected to the molds 7A, 7C, bacteria 7B and 7D are further purified from the purifying action, so that the purification efficiency can be increased. According to this embodiment, when the water from which the oil has been separated to some extent is purified by the first septic tank 3 and the second septic tank 4, the mold 7A is arranged on the upstream side, and therefore the degrading enzyme secreted from the mold 7A is used. Can be discharged to the downstream side, which is advantageous for increasing the purification ability of the mold 7A by the decomposing enzyme in the entire purification flow path.
[0052]
That is, the carrier holding portion 9A holding the carrier 8A carrying the mold 7A is relatively upstream in the flow path of the water from the second carrier holding portion 9B holding the second carrier 8B carrying the bacteria 7B. Provided on the side, the degrading enzyme secreted from the mold 7A can be supplied to the downstream side. Further, since the second carriers 8B and 8D are provided on the downstream side of the mold 7A, it is a porous body. It can also be expected that the degrading enzyme is carried in the pores of the second carriers 8B and 8D, whereby the discharge of the degrading enzyme in a short time can be suppressed, which is advantageous in improving the purification efficiency.
[0053]
According to the present embodiment, as shown in FIG. 1, a suction pipe 201 is connected to a lower part of the first purification tank 3 via a suction valve 200 and a backwashing pump 202, and A discharge pipe 204 is connected to the upper part via a discharge valve 203. Normally, the suction valve 200 and the discharge valve 203 are closed. When cleaning the first septic tank 3, when the backwashing pump 202 operates with the flow control valves 44 and 35 closed and the suction valve 200 and the discharge valve 203 opened, the suction pipe 201 is disconnected. Wash water is supplied into the first septic tank 3. The cleaning water flows upward (in the direction of arrow D2) in the first septic tank 3. Then, the contaminants existing in the first septic tank 3 are washed with washing water and discharged outward from the discharge pipe 204, whereby the inside of the first septic tank 3 is washed. When the cleaning of the first septic tank 3 is completed, the suction valve 200 and the discharge valve 203 are closed, and the flow rate adjustment valves 44 and 35 are opened.
[0054]
The above-described water purification apparatus shown in FIG. 1 may be a fixed system that is fixedly installed on an installation surface, or a movable system that is mounted on a bed of a vehicle such as a truck. In the case of the movable system, a water purification device mounted on a vehicle such as a truck is conveyed to a water source, and sewage is pumped up to the oil / water separation tank 2 at that location, where it is purified by the oil / water separation tank 2, the first purification tank 3, and the second purification tank 4. be able to.
[0055]
(Other)
According to the above-described embodiment, as shown in FIG. 2, the carrier holding unit 9 </ b> A holding the molds 7 </ b> A arranged in the first septic tank 3 floats it on the water surface W <b> 1 of the first septic tank 3. This is a system having a float 92. However, the present invention is not limited thereto, and a hook-shaped engaging portion for detachably engaging the carrier holding portion 9A with the first purification tank 3 so that the carrier holding portion 9A is located near the water surface W1 of the first purification tank 3 is provided. Alternatively, a method provided in the first septic tank 3 may be used.
[0056]
According to the above-described embodiment, as shown in FIG. 6, the second septic tank 4 is provided with a hook-shaped engaging portion 39C for engaging and holding the carrier holding portion 9C for holding the mold 7C as a holding portion. The system is provided, but is not limited thereto, and the carrier holding unit 9C may be a system that floats by a float. The carrier holder 9C can float on the water surface W2 of the water in the second septic tank 4 by the float.
[0057]
According to the above-described embodiment, both the first purification tank 3 and the second purification tank 4 are provided, but either one may be used depending on the degree of contamination of the water to be purified. In addition, the method of the present invention and the device of the present invention are not limited to the above-described embodiment, but can be appropriately modified and implemented without departing from the gist. The following technical idea can also be recognized from the above description.
(Additional Item 1) The water purification method and water purification device according to any one of the claims, wherein a porous body is disposed in a flow path on the downstream side of the mold. The degradation enzyme secreted from molds can be carried on the porous body, which is advantageous for suppressing the loss of the degradation enzyme.
[0058]
【The invention's effect】
As described above, according to the present invention, molds carried on a carrier are retained in an area to which air and water are supplied, which is advantageous for the propagation of molds, and purifies water with molds. It is possible to provide a water purification method and a water purification device that can perform the method.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view schematically showing a water purification device.
FIG. 2 is a cross-sectional view schematically showing the inside of a first septic tank.
FIG. 3 is a perspective view schematically showing a carrier holding portion for holding a carrier carrying molds provided in a first septic tank.
FIG. 4 is a perspective view schematically showing a carrier holding unit for holding a carrier carrying molds provided in the second septic tank.
FIG. 5 is a cross-sectional view schematically showing a state in which a second carrier holding portion for holding a second carrier carrying bacteria, which is provided in the first septic tank, is held in the first septic tank.
FIG. 6 is a sectional view schematically showing the inside of a second septic tank.
[Explanation of symbols]
In the figure, 1 is a substrate, 2 is an oil-water separation tank, 3 is a first purification tank, 30 is a first purification chamber, 4 is a second purification tank, 40 is a second purification chamber, 7A and 7C are molds, and 8A and 8C are Carriers, 8B and 8D are second carriers, 7B and 7D are bacteria, 9A and 9C are carrier holding portions, 9B and 9D are second carrier holding portions, 39B is an engaging portion (holding portion), and 9m is an engaged portion. (Holding unit).

Claims (8)

A step of preparing a carrier carrying molds and a container holding water to be purified,
In the area where air and water are supplied, by holding at least a part of the carrier, propagate the molds carried on the carrier, and purify the water in the container with the molds. A water purification method characterized by performing the following. 2. The water purification method according to claim 1, wherein the molds include rot fungi. 3. The air and water supply region according to claim 1, wherein the air and water are supplied to the air / water boundary region on the surface of the water in the container or the air / water above the water surface in the container. A water purification method, which is a supply area. The method according to any one of claims 1 to 3, wherein the water in the container is further purified by bacteria supported on a second carrier immersed in the water of the container. Water purification method. A container for holding the water to be purified;
A carrier holding unit that holds at least a part of a carrier that supports molds in a region where air and water are supplied,
A water purification apparatus, wherein the molds supported on the carrier are propagated, and the molds purify water in the container. In claim 5, at least one of the container and the carrier holding portion,
A holding unit that holds at least a part of the carrier holding unit in an air / water boundary region on the surface of water in the container or in an air / water supply region above the surface of water in the container. A water purification device characterized by the above-mentioned. The water purifier according to claim 5, wherein the carrier holding unit has a float that floats the carrier holding unit on a surface of water in the container. The water purifier according to any one of claims 5 to 7, wherein a second carrier holding portion for holding a second carrier carrying bacteria is provided in the container.

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