JP6610112B2 - Water tank and visual recognition method in the water tank - Google Patents

Description

  The present invention relates to an aquarium, and more particularly to an aquarium suitable for an apparatus for treating organic wastewater such as domestic wastewater, sewage, food factories, pulp factories, semiconductor production wastewater, and liquid crystal production wastewater. The present invention also relates to a method for visually recognizing the situation in the aquarium with a camera.

The activated sludge method used when biologically treating organic wastewater is widely used for sewage treatment, industrial wastewater treatment, and the like because of its advantages such as good treated water quality and easy maintenance. However, since the BOD volumetric load in the activated sludge method is generally about 0.5 to 0.8 kg / m ³ / d, a large site area is required. In addition, in order to ensure capacity | capacitance, suppressing installation space, using a tower-shaped water tank is examined.

For high-load treatment of organic wastewater, a fluidized bed method with a carrier added is known. When this method is used, it is possible to operate with a BOD volume load of ³ kg / m ³ / d or more.

  In addition, organic wastewater is first treated with bacteria in the first treatment tank, and the organic matter contained in the wastewater is oxidatively decomposed and converted into non-aggregating bacterial cells, and then the fixed protozoa in the second treatment tank. There is also a method of reducing excess sludge by precipitating and removing it.

  Many water treatment methods using living organisms have been devised. In order to perform such wastewater treatment stably, it is necessary to regularly monitor the water quality and the water surface condition (water level, presence or absence of foaming, etc.). As a method for regularly monitoring the water quality, a method for visually checking turbidity and a method for chemically analyzing the turbidity and components of the collected waste water are often employed.

  Moreover, like the water quality monitoring apparatus of patent document 1, always image | photographs the water surface using the imaging | photography means and the illumination means within the light shielding hood which floats on the water surface of the aquarium, and the state of the flock in water is analyzed from the image | photographed image Thus, a method for automatically determining the suitability of wastewater treatment has been proposed. Thereby, the waste water treatment performed continuously can be automatically monitored.

JP-A-9-281100

  When the water quality monitoring device of Patent Document 1 is installed in a water tank, the camera is always placed in the water tank, and it is extremely difficult to perform camera maintenance. Moreover, if a monitoring device is installed in each water tank, the facility cost increases.

  Moreover, when the monitoring apparatus of patent document 1 is applied to a water tank with a large tank height, it is necessary for an operator to climb to the top of the tank to perform installation work and maintenance, and the work is troublesome. The equipment cost will increase because it will always be installed.

  This invention aims at providing the water tank which can know the condition in a tank with a camera, if necessary, and the visual recognition method in this water tank, without arrange | positioning a camera in a tank continuously. .

  The water tank of the present invention comprises a camera insertion tube for inserting a camera into the tank, and the tip of the camera insertion tube inside the tank opens above the water level in the tank. To do.

  In one aspect of the present invention, the tip inside the tank opens downward.

  In one aspect of the present invention, the camera insertion tube penetrates the side surface of the water tank. It is preferable that the end portion outside the tank of the camera insertion tube has a height of 2 m or less from the water tank installation surface.

  In one embodiment of the present invention, the water tank has a tank height of 6 m or more.

  The visual recognition method in the aquarium of the present invention is characterized in that a camera unit equipped with a camera at the tip is inserted into the aquarium through the camera insertion tube, and the interior of the aquarium is visually recognized by the camera.

  In one aspect of this visual recognition method, a plurality of water tanks are installed, and the inside of each water tank is visually confirmed using a common camera unit.

  The water tank of the present invention is provided with a camera insertion tube, and when necessary, introduces a camera into the tank through the camera insertion tube, and knows the situation in the tank, particularly the water level (such as the water level and the presence or absence of foaming). Can do. Since the camera only needs to be inserted into the biological treatment tank when observation is necessary, there is no need to permanently install it in the water tank, and the equipment cost of the water tank is hardly increased. Also, the camera can be pulled out of the water tank for easy maintenance.

  The present invention can be applied even if the water tank is a closed type. Moreover, even if the tank height is large, the situation in the tank can be known by the camera without going up to the top of the tank. Even if a plurality of water tanks are installed, the inside of each water tank can be visually recognized using a common camera unit.

It is a longitudinal cross-sectional view of the biological treatment apparatus of the organic waste_water | drain using the water tank which concerns on embodiment. It is the II-II arrow directional view of FIG. It is the III-III arrow line view of FIG. It is a side view of a camera insertion tube. It is a flowchart of a biological treatment apparatus.

  Embodiments of a water tank and a visual recognition method in the water tank of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows an example of an organic wastewater biological treatment apparatus equipped with a water tank. In the following embodiments, the water tank is a biological treatment tank, but the water tank may be a raw water tank, a solid-liquid separation tank (for example, a precipitation tank, a pressurized levitation tank), or the like.

  The biological treatment tank 1 includes a cylindrical tower body (tank body) 10 made of FRP, a raw water (treated water) inlet 11 provided on a lower side surface of the tower body 10, and a bottom portion in the tower body 10. A provided diffuser pipe 12, an air pipe 13 for connecting the diffuser pipe 12 to a blower (not shown), a siphon break pipe 13A connected to the middle of the air pipe 13, and the middle of the tower body 10 in the vertical direction or lower than that A plurality of strainers 14, 14 provided in the upper and lower sides along the inner peripheral surface of the tower body 10, a connection pipe 15 connecting the strainers 14, a treated water outlet 16 communicating with the connection pipe 15. A drain pipe 17 extending in the direction, a defoamer aqueous solution injection pipe 18 provided in the vertical direction in the tower body 10, a camera insertion pipe 19 and the like are provided.

  The tower body 10 has a closed shape in which the canopy is connected to the side peripheral surface. An opening 10a is provided at the top of the canopy, and the inside of the tower body 10 communicates with the atmosphere through the opening 10a. In addition, when a processing tank is anaerobic processing, a valve or a blind plate is provided in the opening 10a or the opening 10a is omitted. In the case of aerobic treatment, the tower body 10 may be an open type that does not have a canopy portion.

  One end side of the air pipe 13 penetrates the lower part of the tower body 10 and protrudes outside the tower body 10, and an air supply pipe from the blower is connected to the tip of the air pipe 13. The other end of the air pipe 13 is connected to the diffuser pipe 12.

  The air pipe 13 rises above the water level in the tower body 10, and one end of a siphon break pipe 13A is connected to the highest portion 13b of the rise. The siphon break pipe 13 </ b> A is routed downward in the tower body 10, and the other end side penetrates the lower part of the tower body 10 and projects out of the tower body 10. A valve 13a is provided at the tip of the siphon break pipe 13A.

  The strainer 14 is installed near the middle in the vertical direction of the tower body 10 or below it. As shown in FIG. 2, the strainer 14 includes a box 14 a attached by being bonded to the inner peripheral surface of the tower body 10, and a screen 14 b made of a wedge wire or the like provided on the front surface of the box 14 a. The rear surface of the box 14 a is open, and the rear end of the box 14 a is bonded to the inner peripheral surface of the tower body 10.

  In this embodiment, two strainers 14 are provided vertically apart from each other, and the inside of each strainer 14 is communicated by a connection pipe 15. However, one or three or more strainers 14 may be provided. Moreover, the strainer 14 may be spaced apart from the left and right.

  The connection pipe 15 has a half-cylindrical shape and is bonded to the inner peripheral surface of the tower body 10. The treated water outlet 16 communicates with the connection pipe 15 through an opening provided in the tower body 10.

  Although illustration is omitted, a hand hole is provided in the tower body 10 in order to maintain the inside of the strainer 14.

  The drain pipe 17 extends in the vertical direction along the inner peripheral surface of the tower body 10. The drain pipe 17 has a half-cylindrical shape except for the uppermost part, and is bonded to the inner peripheral surface of the tower body 10. The uppermost part of the drain pipe 17 has a cylindrical shape and opens into the tower body 10 above the water level. A lower end portion of the drain pipe 17 communicates with a drain outlet 17a at the lower portion of the tower body 10.

  The defoamer injection pipe 18 and the camera insertion pipe 19 are routed in the vertical direction in the tower body 10, and the upper end portion is bent in a substantially U shape so as to face downward, and the water surface in the tower body 10 Open above the position. The lower ends of the water injection pipe 18 and the camera insertion pipe 19 penetrate the lower side surface of the tower body 10 and project outside the tower body 10. The bent portion of the camera insertion tube 19 is a curved portion (about 30 to 200 mm) having a sufficiently large radius of curvature so that the camera 20 passes smoothly.

  In addition, although illustration is abbreviate | omitted, in the biological treatment tank 1, the extraction pipe | tube of a surplus sludge, a sampling port, a manhole, a preliminary seat (not shown), etc. are provided.

  The tower body 10 is preferably made of a resin such as FRP because it does not require lining, but may be a steel plate depending on the water quality. In the case of FRP, it is preferable to apply a weather-resistant paint for the purpose of preventing deterioration due to ultraviolet rays and improving corrosion resistance. Further, when the tower body 10 is made of FRP, it is preferable to make the wall thickness of the lower part of the tower where the water pressure becomes larger than that of the upper part. The upper and lower parts of the tower body may be thicker than the upper part, and the lower part may be thicker than that.

  If necessary, measuring instruments such as a water level gauge, pressure gauge, flow meter, water temperature gauge, water quality meter, etc. are installed in the tower 10 or peripheral equipment, piping, etc., and used for monitoring operating conditions, operational control, operational management, etc. . In addition, it is used for optimizing the treatment in the water tank in combination with incidental facilities (for example, facilities equipped with water supply, heating, chemical injection, aeration, dehydration functions, etc.).

  In this embodiment, the biological treatment tank 1 is filled with a fluidized bed carrier. The shape of the fluidized bed carrier is any shape such as a spherical shape, a pellet shape, a hollow cylindrical shape, a thread shape, and a plate shape, and the size (diameter) is about 0.1 to 10 mm. The material of the fluidized bed carrier is arbitrary such as a natural material, an inorganic material, or a polymer material, and a gel material may be used. The carrier is not limited to a fluidized bed carrier, and may be either a fixed bed carrier or a rocking carrier, and two or more kinds of carriers may be used in combination.

  As the swing bed carrier, it is preferable that the material is a foamed synthetic resin, particularly a flexible polyurethane foam. When a porous thin plate-like or strip-like sheet-like rocking bed carrier such as a lightweight polyurethane foam is installed in the biological treatment tank 1, the rocking bed carrier has sufficient elasticity, Even if it is thin, it has sufficient mechanical strength by bending in the flow of water. Moreover, by bending, it mixes uniformly, without inhibiting the water flow in a tank, and a sludge containing liquid comes to flow uniformly also into the porous structure of a support | carrier.

  In order to treat organic wastewater with this organic wastewater biological treatment device, raw water (organic wastewater) is introduced into the biological treatment tank 1 through the raw water inlet 11, and aerated with an air diffuser 12 to be aerobic. Biological treatment. The treated water in the biological treatment tank 1 is taken out from the treated water outlet 16.

  Air during aeration in the biological treatment tank 1 is discharged outside the tower through the opening 10a at the top of the tower. Bubbles generated during aeration are discharged to a drain pit outside the tower body 10 through the drain pipe 17. A foam sensor is provided in this drainage pit, and when there are many bubbles, an antifoaming agent or water is injected.

  When the screen 14b of the strainer 14 is clogged, air is supplied into the strainer 14 and backwashed with air.

  When the operation of the biological treatment tank 1 is stopped, the valve 13a is opened to prevent the water in the biological treatment tank 1 from flowing backward in the pipe 13 due to the siphon phenomenon.

  While the biological treatment tank 1 is operating or stopped, the camera unit provided with the camera 20 is inserted into the tank through the camera insertion tube 19 so that the situation in the tank can be visually observed. When a plurality of water tanks such as biological treatment tanks are installed, after observing in one water tank using one camera unit, the camera unit is pulled out from the camera insertion tube 19 and inserted into another water tank. The camera unit can be inserted into the tube 19 to observe the inside of the water tank. Therefore, even if a large number of water tanks are installed, the number of camera units is only one or a small number.

  The camera 20 is a camera unit to which a bendable bundled cable 21 is connected. The bundled cable 21 is bundled with an energization harness, a photographing signal harness, and a wire sheath for controlling the directing direction of the camera 20. An illumination lamp may be provided at the tip of the camera 20 so that the inside of the tank can be illuminated and photographed.

  As shown in FIG. 1, the camera insertion tube 19 is introduced into the tower body 10 horizontally from the lower side surface of the tower body 10, is bent in the middle, changes its direction vertically upward, and reaches the upper part of the water surface. The direction is changed by 180 ° or the like, and the tip portion opens downward. This not only facilitates the camera to shoot the water surface, but also prevents foaming bubbles and splashes of dirt from entering the camera insertion tube 19.

  By making the tip part inside the tank of the camera insertion tube 19 at an upper position of about 600 to 1200 mm from the water surface when aeration is stopped, it is possible to prevent the backflow of water.

  The inner diameter and the radius of curvature of the camera insertion tube 19 are preferably such that the cable 21 advances without bending. The radius of curvature is preferably about 30 to 200 mm, and the inner diameter is preferably about 25 to 80 mm. Moreover, it is preferable that an inner surface is a smooth curved surface without an uneven part.

  The cable 21 needs to have enough elasticity to push the camera 20 within the camera insertion tube 19. Therefore, it is preferable to use an elastic cable having no break.

For example, one of the following is suitable for the camera unit, but is not limited thereto.
(1) With the cord connected to the camera, wind the cord with an elastic spiral tube or spring (no break) and integrate. The spiral tube and spring serve as an elastic support. The spiral tube is preferably a member that can be bent and deformed by spirally winding a belt-like body made of a flexible material. A camera unit with a spring can be created by winding a metal wire (metal type, thickness, etc.) around a core cord, or by inserting a core cord into a coil spring created in advance. You can also.
(2) In a state where the cord is connected to the camera, the cord is integrated with a rod-like elastic support (no cut) and is integrated by wrapping with a tape or a wire. The rod-shaped elastic support body is, for example, a soft resin rod-shaped member or a bundle of one or more metal ropes in which a large number of metal wires are converged.
(3) A cord is connected to the wireless camera, and the cord is wound and integrated by an elastic spiral tube (a spirally wound belt) or a spring (no break). The spiral tube becomes an elastic support.
(4) Connect a rod-like elastic support (no break) to the wireless camera.
(5) A wire rope formed by spirally winding or twisting a metal cable around a cord. A metal cable is a cable in which a large number of metal wires are converged.
(6) A cord serving as a core is inserted into a flexible tube (no cut, preferably made of synthetic resin for weight reduction), and is fixed and integrated. The flexible tube becomes an elastic support.

  In order to maintain mechanical strength and elasticity, the band-shaped body constituting the spiral tube has a band width P of about 5 to 20 cm, a thickness T of about 0.5 to 1.5 mm, and an angle of each cut of 45 to 60. A degree of about ° is preferable. In addition to elasticity, the material needs to be a material that can withstand taking into and out of the camera insertion tube 19 and carrying, and for example, polyethylene and hard rubber are preferable. Examples of the spring include those in which a core wire is covered with hard rubber or resin.

  The camera 20 is exemplified by a CCD camera. However, the camera 20 is not particularly limited as long as it is a small camera that can shoot any one of a still image, a moving image, and a measurement image. However, if the aquarium is a closed type, a camera with illumination and infrared or night vision correction is desirable. It is preferable to attach an auxiliary cover to the camera 20 to prevent breakage and to move the camera insertion tube 19 smoothly. If a cover made of a material having low friction (high slidability) is used as this cover, the frictional resistance when the camera is taken in and out becomes small.

  When the biological treatment tank is an anaerobic treatment tank, the inside of the tank is sealed and methane gas is generated in the tank. Therefore, a valve is provided outside the tank of the camera insertion tube 19 to prevent backflow and leakage of the generated methane gas. It is preferable to provide a camera unit (not shown), close the valve during normal operation, and open the valve when operation is stopped to introduce the camera unit. Further, as shown in FIG. 4, the camera insertion tube 19 may be provided with a trap part (U-shaped part) 19T, and water may be poured into the trap part 19T to form a water seal part. In this way, the camera unit can be introduced into the treatment tank even when the biological treatment tank is in operation. When the trap part 19T is provided, the camera insertion tube 19 may not be provided with the above-described valve, and may be provided.

  In one embodiment of the present invention, the tower body 10 has a diameter of 2.2 to 3.6 m, particularly 2.4 to 3.3 m, a height of 6 to 11 m, particularly 8 to 11 m, and a height H. And the ratio H / D of the diameter D is preferably 1.5 to 5.0, particularly 3.0 to 4.5.

  It is preferable that the terminal part outside the tank of the camera insertion tube 19 has a height of 2 m or less (for example, 0.5 to 2 m) from the installation surface (base 3) of the tower body 10. In this way, the camera unit 20 can be easily put in and out of the camera insertion tube 19. Moreover, it is preferable that the connection part of main piping, the manhole, the strainer 14, the diffuser pipe 12, etc. are 4 m or less in height from the foundation 3, especially 3.0 m or less. Thus, by providing the connection portion, manhole, strainer 14, diffuser pipe 12 and the like at a low position, pipe connection work, equipment installation work, and various maintenance work are not high place work, and work efficiency and safety are improved.

  In the present invention, a plurality of aerobic biological treatment tanks 1 may be installed, an anaerobic treatment tank may be installed in the previous stage, and treated water from the anaerobic treatment tank may be introduced into the aerobic biological treatment tank. The size of the tower body of the anaerobic treatment tank may be the same as that of the tower body 10.

  The aerobic tank in the final stage may use MBR immersed in the tank or installed outside the tank. Further, a solid-liquid separation may be performed by installing a pressurized flotation tank or a coagulation sedimentation tank in the subsequent stage.

  When the aerobic treatment of the treatment tank is a fluidized bed, the treatment is transient, but in the case of the flotation method (activated sludge method), surplus sludge by solid-liquid separation is returned.

  In the present invention, in the first-stage biological treatment tank, the first biologically-treated water in which the dispersed bacteria are increased is generated by the decomposition of organic substances by the dispersed bacteria, and in the second-stage biological treatment tank, the dispersed bacteria are preyed on by the micro animals. You may make it make it. In this invention, you may install an adjustment tank in the front | former stage of an anaerobic or aerobic processing tank. Examples of the adjustment tank include, but are not limited to, a raw water tank for leveling the raw water flow rate, a settling tank for settling solid matter, and a pressurized flotation device.

  An example of the combination of the raw water tank and the biological treatment tank is shown in FIGS. FIG. 5A shows a combination of a raw water tank and an aerobic tank. FIG. 5B includes a raw water tank, an anaerobic tank, and an aerobic tank in this order. FIG. 5C includes a raw water tank, a first aerobic tank, and a second aerobic tank in this order. FIG. 5D shows a raw water tank, an anaerobic tank, a first aerobic tank, and a second aerobic tank in this order. Although illustration is omitted, a solid-liquid separation tank (such as a precipitation tank or a pressure levitation tank) may be provided at the subsequent stage of FIGS. Further, other processing means may be provided. Although the raw water tank is provided in FIGS. 5A to 5D, the raw water tank may be omitted.

  In the present invention, it is preferable that the biological treatment tank is preliminarily attached to the tower body with attached equipment such as a diffuser pipe at the factory, transferred to the site, and installed on the foundation. As a result, the number of work on site can be reduced, the construction period can be shortened, and the assembly accuracy can be improved.

DESCRIPTION OF SYMBOLS 1 Biological treatment tank 10 Tower body 12 Aeration pipe 14 Strainer 19 Camera insertion pipe 20 Camera

Claims (8)

A water tank for a water treatment device,
A camera insertion tube for inserting the camera into the tank, the tank inside the tip of the camera insertion tube, water tank, characterized in that it is open at above the water surface level in the tank.   The water tank according to claim 1, wherein a tip portion inside the tank is opened downward.   3. The water tank according to claim 1, wherein the camera insertion tube passes through a side surface of the tank.   4. The aquarium according to claim 1, wherein a terminal portion outside the tank of the camera insertion tube has a height of 2 m or less from the water tank installation surface.   The aquarium according to any one of claims 1 to 4, wherein a tank height of the aquarium is 6 m or more. The water tank according to any one of claims 1 to 5 , wherein the water tank is a raw water tank, a biological treatment tank, or a solid-liquid separation tank. In the method of visually recognizing the inside of the water tank of the water treatment device with a camera,
The water tank is the water tank according to any one of claims 1 to 6 ,
A visual recognition method in a water tank, wherein a camera unit having a camera at a distal end is inserted into the water tank through the camera insertion tube, and the inside of the water tank is visually recognized by the camera. 8. The visual recognition method in the water tank according to claim 7, wherein a plurality of water tanks are installed, and the inside of each water tank is visually recognized using a common camera unit.

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