JP2004216358A - Sewage cleaning apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the sewage cleaning apparatus having a high cleaning capacity of a septic tank. <P>SOLUTION: In the sewage cleaning apparatus equipped with the septic tank 1 and a carrier body 11, on which microorganisms are supported, housed in the septic tank 1 and constituted so as to pass sewage through the carrier body 11 to clean the same by the decomposition capacity of microorganisms, the septic tank 1 is appropriately heated from the outside by the waste heat of a fuel cell 300. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a sewage purification device, and more particularly to a sewage purification device that purifies sewage by the resolution of microorganisms.
[0002]
[Prior art]
In a sewage purification device that purifies sewage by the resolution of microorganisms, microorganisms are carried on activated carbon or other carriers in the septic tank, and when sewage passes through the carrier, organic components contained in the sewage are removed. Is first adsorbed and adhered to a carrier, and its components are then decomposed by the resolution of microorganisms to remove sewage (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-2002-28678 (pages 2 to 4, FIGS. 1 and 2)
[0004]
[Problems to be solved by the invention]
In such a sewage purification apparatus, the purification capacity of a septic tank depends on the resolution of microorganisms. However, it has recently been found that the resolution depends on the temperature at which microorganisms grow, and sewage purification with a septic tank taking this into account has been found. Equipment is being requested.
[0005]
Therefore, an object of the present invention is to provide a sewage purification device capable of meeting such a demand.
[0006]
[Means for Solving the Problems]
The first technical means taken to solve the above technical problem is, as shown in the feature 1,
A sewage purification apparatus comprising: a septic tank and a carrier housed in the septic tank and carrying microorganisms, wherein the sewage purifies the sewage with the resolution of the microorganisms when the sewage passes through the carrier. Sewage purifier that is appropriately heated from the outside by the waste heat of the equipment. "
That is, it is constituted.
[0007]
In the sewage purifying apparatus described in the above feature 1, heat is externally applied to the septic tank, and the added heat provides an optimum breeding temperature of microorganisms, improves resolution of microorganisms, and purifies the septic tank. Ability is improved.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
A specific example of the sewage purification device according to the present invention will be described with reference to the accompanying drawings.
[0009]
In FIG. 1, the sewage purification apparatus includes a purification tank 1. Thus, the carrier 11 carrying microorganisms is accommodated in the septic tank 1, and the septic tank 1 continuously purifies sewage using the adsorption and the resolution of microorganisms by the carrier 11. I have.
[0010]
An inflow pipe 32 and an outflow pipe 33 are connected to the lower side and the upper side of the septic tank 1, respectively, and the sewage flowing into the septic tank 1 via the inflow pipe 32 passes through the carrier 11 from below to above. During that time, the organic components in the sewage adhere to the carrier 11 and are decomposed, so that they are continuously purified. The sewage from which the organic components have been purified is discharged through an outflow pipe 33 in which a flow meter 331 is interposed. In addition, the inflow pipe 32 is provided with a three-way valve 320 located near the lower side of the septic tank 1. In addition, a discharge pipe 36 provided with an on-off valve 360 is connected to the lower side of the septic tank 1.
[0011]
The microorganism input tube 31 is connected to the upstream of the inflow tube 32 via a three-way valve 34. The microorganism charging tube 31 is used not only for charging microorganisms into the septic tank 1 but also as an oxygen supply tube and a microorganism activating agent charging tube. In the inflow pipe 32, a reversible pump 110 is interposed between the three-way valve 320 and the three-way valve.
[0012]
The support 11 on which the microorganisms are supported is activated carbon particles having a size (mesh size) of about several millimeters, and is filled in the inner basket 90 as shown in detail and clearly in FIGS. 2 and 3. I have. That is, the inner basket 90 is a bottomed container made of stainless steel, and four fan-shaped openings 91 are formed in the bottom wall at the lower end in the axial direction. A mesh 12 is placed on the lower end side inside the inner basket 90, and a predetermined amount of activated carbon particles are deposited and filled on the mesh 12 to form the carrier 11. A mesh 12 fitted in the upper end opening of the inner basket 90 is disposed on the deposited and filled support 11 serving as activated carbon particles. Thus, the carrier 11 is filled in the inner basket 90.
[0013]
The inner basket 90 in which the carrier 11 serving as activated carbon particles is filled in the above-described manner is placed on a support base 19 serving as an inner flange formed at a lower portion of the inner wall of the septic tank 1 via a seal member or packing 99. Is placed. As a result, a space is defined between the lower end of the inner basket 90 and the bottom of the septic tank 1, and this space communicates with the inflow pipe 32 and the discharge pipe 36. A space is also defined between the upper end of the inner basket 90 and the lid 18 serving as the top of the septic tank 1, and this space communicates with the discharge pipe 33.
[0014]
Thus, the lid 18 is mounted so that the upper end of the septic tank 1 can be opened and closed freely. That is, the left end of the lid 18 is hinged to the left edge of the upper end of the septic tank 1 with a hinge (not shown), and when the lid 18 is opened and the upper end of the septic tank 1 is opened, the inner basket 90 is closed. It can be inserted into and removed from the septic tank 1. The inner basket 90 is inserted into and removed from the septic tank 1 when the carrier 11 is replaced with a new carrier due to clogging of the carrier 11 as activated carbon particles. This is the time when it was discovered that the carrier 11 gleaned from the formed viewing window 181 was floating. This is because the oil component contained in the sewage clogs the carrier 11 with the passage of time and forms a film on the lower end surface of the carrier 11, thereby preventing the sewage from passing through the carrier 11. As a result, the water pressure of the sewage causes the entire carrier 11 and the upper mesh 12 to float.
[0015]
At the edge on the upper end side of the inner basket 90, one or more pairs of catches 93 having an eyelet-shaped tip are formed. In other words, a pair of fishing gear 93 extends upward from two positions located on the same diameter of the edge of the inner basket 90 on the upper end side. When the inner basket 90 is disposed in the septic tank 1, the one or more pairs of fishing hoists 93 are pressed by stoppers 96 provided on the inner wall of the septic tank 1, and the inner basket 90 is supported by buoyancy. From 19, it does not rise. This is because when the inner basket 90 is detached from the support base 19 by buoyancy and the liquid-tight engagement between the two is released, the sewage does not pass through the carrier 11 (that is, the sewage moves along the outer wall of the inner basket 90 in the axial direction). (Ascending along) so as not to be discharged from the discharge pipe 33.
[0016]
The stopper 96 is hinged to the inner wall of the septic tank 1 by a hinge (not shown). In the state shown in the figure, the stopper 96 is positioned substantially perpendicular to the inner wall of the septic tank 1. The inner basket 90 can be inserted into and removed from the septic tank 1 by laying it on the inner wall (described later). Specifically, if the stopper 96 is laid on the inner wall of the septic tank 1, the inner basket 90 can be inserted into and removed from the inside of the septic tank 1 by catching the fishing hoist with a crane or a winch.
[0017]
The lid 18 is provided with an air vent 10 for degassing, and the inner volume of the septic tank 1 is about 2 cubic meters, and therefore, the volume of the inner basket 90 and thus the inner basket 90 is accommodated. The amount of the carrier 11 is slightly smaller than this.
[0018]
In a space defined between the lower end of the inner basket 90 and the bottom of the septic tank 1, an air diffuser 97 having a large number of pores is provided. The air diffuser 97 is connected to a fan 98 located outside the septic tank 1 via a pipe. When the fan 98 is driven, air is emitted from the air diffuser 9 in the form of air bubbles, and the carrier 11 To activate the microorganisms carried by the microorganism. The drive of the fan 98 may be performed at all times, or may be performed intermittently or automatically when the amount of oxygen detected using a sensor (not shown) decreases.
[0019]
The inflow pipe 32 on the upstream side of the septic tank 1 is connected to the oil / water separation tank 5 (volume: about 3 cubic meters) via a three-way valve 320, a reversible pump 110, and a three-way valve. In the oil-water separation tank 5, a float funnel 51 that floats on the sewage is provided. The float funnel 51 is connected to an oil storage tank 54 (volume: about 0.2 cubic meters) via a connection hose 52 and an oil drain pipe 53 provided with an on-off valve 53a. A float switch 56 is provided in the oil / water separation tank 5, and the float switch 56 is electrically connected to a control circuit 57. Thus, when the amount of sewage stored in the oil-water separation tank 5 reaches a predetermined value and the water level accompanying the water exceeds a predetermined value, a signal is sent from the float switch 56 to the control circuit 57, and the control circuit 57 The operation of 58 is stopped to interrupt the flow of sewage into the oil / water separation tank 5.
[0020]
The septic tank 1 and the oil storage tank 54 adjacent to the septic tank 1 are disposed in a common container 100, and the oil / water separation tank 5 is placed on the container 100. Thus, the entire apparatus can be moved by pulling up a rope (not shown) that passes through a fishing hoist 102 (only two are shown) provided on the upper body of the container 100 with a crane. Specifically, the device can be placed on a large truck and the installation location can be moved. At this time, the hose 30a is detached from the water pump 30.
[0021]
Further, the side surface of the container 100 can be opened. At this time, only the septic tank 1 can be taken out of the container 100 with a forklift after removing the associated piping. After removing the septic tank 1 from the container 100, the inner basket 90 can be removed by opening the lid. That is, if the stopper 96 is laid on the inner wall of the septic tank 1 and the fishing hoist is caught with a rope using a crane or a winch, the inner basket 90 can be taken out of the septic tank 1. Loading of the inner basket 90 filled with the new carrier 11 into the septic tank 1 can be performed in the reverse procedure.
[0022]
The fixation of the microorganisms to the septic tank 1 is performed as follows. First, the three-way valve 34 is used to connect the microorganism introduction tube 31 and the inflow tube 32 and shut off the inflow tube 32 and the oil-water separation tank 5. At this time, the air port 10 is open, and the air introduced into the septic tank 1 through the air port 10 creates an environment that is comfortable for microbial growth. Next, the microorganism culture solution is introduced into the microorganism introduction tube 31, and the microorganisms reach the lower part of the septic tank 1 via the inflow tube 32. Then, the microbial culture solution rises from the bottom to the top of the carrier 11 due to the capillary phenomenon, and in this process, the microorganisms attached to the carrier 11 grow as seed bacteria. The microorganism is prepared by liquid culture, and about 10 liters are charged. In addition, after the introduction of the microorganisms, the microorganism culture solution or other microorganism activator is introduced into the microorganism introduction tube 31 and the air containing oxygen is supplied to the microorganisms from the diffuser tube 97, so that the microorganisms multiply inside the septic tank 1. An easy environment is formed, the growth of microorganisms is activated, and high decomposition ability can be provided. In the septic tank 1, the temperature is maintained at the activation temperature of microorganisms or the optimum breeding temperature as necessary (this point will be described later). When the amount of adhered microorganisms is small, it is preferable to increase the input amount of the microorganism culture solution or allow the microorganisms to grow for a desired time.
[0023]
After the three-way valve 34 is used to connect the inflow pipe 32 to the oil / water separation tank 5 and to shut off the inflow pipe 32 and the microorganism input pipe 31, when the water pump 58 is driven, the underground sewage is discharged from the hose 30 a and the hose 30 a. The oil is passed through the pumping pipe 30 and introduced into the oil / water separation tank 5. While the pump 58 is being driven, the level of the sewage in the oil / water separation tank 5 keeps rising. Thus, the oil 81 and the water 82 floating on the surface of the sewage due to the specific gravity difference are vertically separated, and the oil 81 is collected by the float funnel 51, and is stored in the oil storage tank 54 through the hose 52 and the oil drain pipe 53. Is discharged. On the other hand, the water 82 is introduced into the lower part of the septic tank 1 through the inflow pipe 32 by the pump 110 driven in the forward direction. The groundwater pumped by the pump 58 is approximately 10 cubic meters per day. The pump 110 is driven in the reverse direction when fresh water is supplied to the oil storage tank 54 for cleaning via the pipe 120, the three-way valve 320, the inflow pipe 32, and the three-way valve 34. is there.
[0024]
In the septic tank 1, the water 82 passes from the bottom upward through the carrier 11 filled in the inner basket 90. In the process, the water 82 uniformly spreads and the organic substances contained therein are contained. The components are adsorbed on the carrier 11 and then decomposed by microorganisms carried thereon, whereby the water 82 is purified. The gas (such as CO 2) that is inevitably generated during the decomposition is discharged from the air port 10. That is, the gas generated in the septic tank 1 is directly discharged from the air holes 10. The water 82 is purified and discharged as purified water 83 via the discharge pipe 33. Specifically, the purified water 83 is used as a middle water supply or returned to a groundwater vein.
[0025]
The organic components contained in the water 82 are adsorbed on the carrier 11 and then decomposed by the microorganisms carried on the carrier 11, but if this adsorption / decomposition is continued for a predetermined time, it is inevitable. Then, clogging of the carrier 11 and formation of an oil film on the lower end surface of the carrier 11 are caused, and the carrier 11 and the upper mesh 12 float with respect to the inner basket 90. When this state is confirmed from the viewing window 181, the carrier 11 is replaced. That is, as described above, the inner basket 90 is taken out of the septic tank 1 and the inner basket 90 filled with a new carrier 11 is loaded into the septic tank 1 so that the carrier 11 is replaced.
[0026]
The material of the inner basket 90 is not limited to stainless steel, but may be another metal, resin, or water-proofed paper.
[0027]
As schematically shown in FIG. 4, a metal pipe 200 is wound around the outer periphery of the septic tank 1. Water heated to a predetermined temperature by the exhaust heat of the fuel cell 300 mounted on the truck flows in the pipe 200 in a circulating manner, and heat is applied to the septic tank 1 from the outside. It has become. Due to the added heat, the resolution of microorganisms is improved, and the purification capacity of the purification tank 1 is increased to the maximum.
[0028]
That is, the fuel cell 300 generates electricity by a chemical reaction between air and hydrogen, as is well known. This electricity is consumed to drive a truck drive motor (not shown), and is also used to drive a pump 58 when operating the sewage purification device while the truck is stopped. The fuel cell 300 is cooled by cooling water circulated through a pipe 304 by a pump 302 in order to prevent heat generated by a chemical reaction from propagating to the surroundings. The cooling water that has exchanged heat with the heat generated by the fuel cell 300 passes through the metal pipe 200 to heat the septic tank 1, is air-cooled by the radiator 310, is sucked by the pump 302, and is discharged again. Since the cooling water that has exchanged heat with the heat generated by the fuel cell 300 has been heated to a predetermined temperature (70 to 80 degrees Celsius), the heat keeps the temperature in the septic tank 1 at the optimum breeding temperature of microorganisms. In addition, the microorganisms are activated (that is, increase in reproduction), and the purification ability is improved. By operating the fuel cell 300, waste heat is inevitably generated. By using such waste heat for activating the microorganisms in the septic tank 1, the microorganisms in the septic tank 1 are activated. Therefore, there is no need to provide a special heating device, and a remarkable effect is obtained in practical use.
[0029]
A temperature sensor 340 is mounted in the septic tank 1. When the temperature detected by the temperature sensor 340 exceeds 80 degrees Celsius, the control device 320 mainly including a microprocessor operates the switching valve 330. Then, hot water (cooling water that has exchanged heat with the heat generated by the fuel cell 300) is directly supplied to the radiator 310 without being supplied to the metal pipe 200 (that is, without heating the purification tank 1). Thus, by bypassing the hot water generated by waste heat through the metal pipe 200 wound around the septic tank 1, it is possible to prevent the microorganisms from being killed due to the water temperature in the septic tank 1 becoming too high. I can do it.
[0030]
As mentioned above, although the specific example of the present invention was explained, the present invention is not intended to be limited to the specific example described above, and any type of sewage purifying device in accordance with the gist of the present invention may be used. For example, it goes without saying that the waste heat of the cogeneration power generator may be used instead of the waste heat of the fuel cell 300.
[0031]
【The invention's effect】
In the sewage purification apparatus of the present invention, heat is applied to the septic tank from the outside, and the added heat improves the resolution of microorganisms and ensures a high purification capacity of the septic tank.
[Brief description of the drawings]
FIG. 1 is a system diagram of a sewage purification apparatus to which the present invention is applied.
FIG. 2 is a detailed sectional view of a septic tank of the sewage purification apparatus shown in FIG.
FIG. 3 is a downward perspective view of an inner basket for accommodating activated carbon particles as a carrier.
FIG. 4 is a diagram showing a relationship between a septic tank and a fuel cell of the sewage purification apparatus shown in FIG.
[Explanation of symbols]
1 septic tank 11 carrier 58 pump (pumping pump)
90 inner basket 300 fuel cell

Claims (5)

A sewage purification apparatus comprising: a septic tank and a carrier that is accommodated in the septic tank and supports microorganisms, and purifies the sewage with the resolution of the microorganisms when sewage passes through the carrier. A sewage purification device that is appropriately heated from the outside by the exhaust heat of equipment. The sewage purification apparatus according to claim 1, wherein the equipment is mounted on a vehicle that transports the septic tank. The sewage purification device according to claim 2, wherein the device drives a motor that is a drive source of the vehicle. The sewage purification device according to claim 1, wherein the device is a fuel cell, a cogeneration device, or another device. The sewage purification apparatus according to claim 1, wherein heating of the waste heat to the septic tank is appropriately controlled to adjust the temperature in the septic tank.

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