JP6732258B2 - Deodorizing device for septic tank and deodorizing method of septic tank - Google Patents

Description

The present invention relates to a deodorizing device for a septic tank used in a septic tank for purifying domestic wastewater and a deodorizing method for the septic tank.

In the purification treatment of domestic wastewater, a sewer treatment facility is generally used, but outside the treatment area, for example, a treatment using a septic tank (also called a combined treatment septic tank) is performed. This septic tank is installed, for example, in the lower part of a parking lot provided in a building or in the ground such as a garden, and the odor generated from the septic tank is diffused into the atmosphere through the odorous tube.
However, in recent years, there is a tendency to block the opening of the odorant pipe (do not use the odorant pipe) at the request of the user of the septic tank. For example, the odor leaked from the septic tank diffuses directly into the atmosphere, and the parking lot There were more complaints about stinks on the road and roads.
Therefore, for example, as shown in Patent Document 1, a malodorous substance in which a malodorous gas is brought into contact with a packed bed made of fibrous activated carbon (or a molded body containing fibrous activated carbon) on which microorganisms decomposing malodorous substances are immobilized. A gas deodorizing method and apparatus have been proposed.

JP, 2003-144839, A

However, since the above-mentioned technique uses microorganisms for deodorization, there is a risk that it cannot sufficiently cope with, for example, seasonal variations and load variations. For this reason, it is necessary to extrapolate and design the culture medium of the microorganism, which may result in a large-scale device configuration.
In addition, since fibrous activated carbon is used, it is easily broken during use and the frequency of replacement increases, which may result in running costs.
As another deodorizing method, for example, there is a method using ozone, but in this case, since an ozone generator, a high-voltage electric circuit, etc. are required, there is a problem that the apparatus configuration becomes complicated and the price rises. is there.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a deodorizing device for a septic tank and a deodorizing method for the septic tank that can deodorize odors generated from the septic tank economically and efficiently with a simple configuration.

A septic tank deodorizing apparatus according to the first aspect of the invention, which is in accordance with the above object, is provided in a septic tank for purifying domestic wastewater, and a deodorizing apparatus for septic tanks that deodorizes odors generated from the septic tank,
A deodorizing box body connected to the septic tank, provided with an odor intake port at the bottom and an exhaust port at the top,
Odor sending means for sending an odor into the deodorizing box body through the intake port,
A desulfurizing agent for removing sulfide components from odor,
A photocatalyst that removes an ammonia component from the odor treated with the desulfurizing agent,
Have a light irradiating means for activating by irradiating light to the photocatalyst,
The desulfurizing agent and the photocatalyst are sequentially accommodated and arranged in the deodorizing box body from the intake port side to the exhaust port side, and the light irradiation means is arranged on the exhaust port side of the deodorizing box body,
A filter was provided at the bottom of the desulfurizing agent, and a space was provided between the intake port and the filter .

The septic tank deodorizing apparatus according to the second invention along the object is provided in a septic tank to purify process domestic wastewater, the septic tank for a deodorizing device for deodorizing odor generated from the septic tank,
A deodorizing box body connected to the septic tank, provided with an odor intake port at the bottom and an exhaust port at the top ,
Odor sending means for sending an odor into the deodorizing box body through the intake port ,
A desulfurizing agent for removing sulfide components from odor,
A photocatalyst that removes an ammonia component from the odor treated with the desulfurizing agent,
Light irradiation means for irradiating the photocatalyst with light to activate it,
The desulfurizing agent and the photocatalyst are sequentially accommodated and arranged in the deodorizing box body from the intake port side to the exhaust port side, and the light irradiation means is arranged on the exhaust port side of the deodorizing box body ,
A space is provided between the intake port and the desulfurizing agent,
On the upstream side of the deodorizing box, insect removing means for collecting and removing the generated insects is provided .
Here, it is preferable to provide a filter in the bottom position before Symbol desulfurizing agent.

In septic tank deodorizing apparatus according to the first, the second invention, the photocatalyst and the desulfurizing agent is contained in a container, the container is freely mounted are preferably detachably attached to the deodorizing box inside the body.
Here, the container is a cartridge containing the desulfurizing agent and the photocatalyst, and the cartridge can be exchanged when the desulfurizing agent and the photocatalyst are exchanged.

In the deodorizing apparatus for septic tanks according to the first and second aspects, it is preferable that the desulfurizing agent is granular and the photocatalyst is granulated.

In the deodorizing apparatus for the septic tank according to the first and second aspects, it is preferable to further provide water removing means for removing generated water to the outside.

In septic tank deodorizing apparatus according to the first, the second invention, the septic tank, commercial facilities, or, if they are installed in a residence, the effect becomes more pronounced.

Third deodorizing method septic tank according to the invention along the object, first, by using a septic tank for deodorizing apparatus according to the second invention, the deodorizing odor generated from the septic tank to purify process domestic wastewater deodorizing there is provided a method,
Sulfide component in odor, and sulfide removal step of removing by the desulfurizing agent,
The ammonia component from said treated with sulphide removal step odor, having an ammonia removal step of removing by the photocatalyst is activated by light emitted from the light irradiation unit.

In the deodorizing method for the septic tank according to the third aspect of the present invention, it is preferable that the desulfurizing agent and the photocatalyst are exchanged within a preset period.

In the deodorizing method for the septic tank according to the third aspect of the present invention, it is preferable to perform an insect removal step of collecting and removing the generated insects before the sulfide removal step.

In the deodorizing method for the septic tank according to the third aspect, it is preferable to perform a water removing step of removing generated water to the outside.

In deodorization method septic tank according to the third invention, the septic tank, commercial facilities, or, if they are installed in a residence, the effect becomes more pronounced.

The deodorizing apparatus for the septic tank and the deodorizing method of the septic tank according to the present invention removes the sulfide component and the ammonia component in the odor, respectively, by the desulfurizing agent and the photocatalyst activated by the light irradiated from the light irradiation means. The odor generated from the septic tank can be economically and efficiently deodorized with a simple structure. In particular, since the odor is treated with the photocatalyst after being treated with the desulfurizing agent, it is possible to prevent the performance of the photocatalyst from being poisoned by the sulfuric acid derived from hydrogen sulfide which is a sulfide component.

It is explanatory drawing of the use condition of the deodorizing apparatus for septic tanks which concerns on the 1st Embodiment of this invention. It is explanatory drawing of the use condition of the deodorizing apparatus for septic tanks which concerns on the 2nd Embodiment of this invention. (A) is a graph showing a result of performing a deodorizing process using the deodorizing device for a septic tank according to a comparative example, and (B) is a graph showing a result of performing a deodorizing process using a deodorizing device for a septic tank according to an example. is there.

Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention.
As shown in FIG. 1, a deodorizing device for septic tanks (hereinafter, also simply referred to as “deodorizing device”) 10 according to a first embodiment of the present invention is provided in a septic tank 11 for purifying domestic wastewater. The device for deodorizing the odor generated from No. 11 is capable of economically and efficiently deodorizing the malodorous components (sulfide component and ammonia component) in the odor generated from the septic tank 11 with a simple configuration. The details will be described below.

The septic tank 11 is, for example, a combined treatment septic tank installed in a building where the sewerage treatment facility cannot be used, and is a conventionally known one that treats wastewater from the kitchen, bathroom, toilet, washroom, and the like. The combined treatment septic tank can be used when the number of persons to be treated is small (for example, several to several tens).
The septic tank 11 is installed, for example, in each building, and its installation location includes, for example, a convenience store (small-scale retail store), a commercial facility, a house, etc. Specifically, it is provided in the building. There is a lower position of the parking lot and underground such as a garden, but its scale (personnel to be treated) and installation location can be variously changed according to the installation environment, and there is no particular limitation, and types of domestic wastewater Also varies depending on the place (environment) where the septic tank is installed.

The deodorizing device 10 is attached to the septic tank 11. Since the deodorizing device 10 is installed on the ground, it does not require work at a high place such as installation work of a conventionally used odorous pipe, and workability can be improved.
The deodorizing device 10 includes a conduit 12 connected to the septic tank 11, a deodorizing box body (an example of a deodorizing flow path) 13 connected to a downstream end of the conduit 12, and a deodorizing box body 13 The desulfurizing agent 14 and the photocatalyst 15 are provided, and the light source capable of irradiating light (one example of light irradiating means: LED lighting) 16 and the fan (one example of odor sending means) 17 provided in the deodorizing box 13 are provided. doing.

The deodorizing box 13 has a cylindrical shape with a bottom and is used in a state (standing state) in which the axial center (direction in which odor flows) is aligned with the vertical direction (upright state). Is openable and closable. The deodorizing box 13 may be made of plastic or metal.
On the side wall of the lower end portion (one side) of the deodorizing box 13, an intake port 19 for the odor containing the malodorous component generated from the septic tank 11 has a horizontal axis (which is orthogonal to the axial center of the deodorizing box 13). The inlet end 19 is connected to the downstream end of the conduit 12. Further, the lid portion 18 (the other side) of the deodorizing box body 13 is provided with an odor exhaust port 20 from which odor components have been removed.

The lid 18 of the deodorizing box 13 is provided with a fan 17 (may be a blower), and is configured to send (suck) odor to the deodorizing box 13 via the intake port 19. The fan 17 is installed, for example, at a position upstream of the deodorizing box 13 (the conduit 12 that connects the septic tank 11 and the deodorizing box 13) or at a position downstream of the deodorizing box 13 (exhaust port 20). You can also
The suction capacity of the fan 17 can be selected according to the treatment capacity of the waste water in the septic tank 11 (capacity of the blower provided in the septic tank 11), and the odor generated from the septic tank 11 does not leak to the outside and the deodorizing box 13 The flow rate may be set within a range that allows supply (for example, the flow rate is about 50 to 150 liters/minute).

Thereby, the odor flowing in the deodorizing box 13 flows from the lower part to the upper part of the deodorizing box 13, but the installation positions of the intake port 19 and the exhaust port 20 of the deodorizing box 13 are reversed, The odor can be made to flow from the upper part to the lower part (the odor flows vertically). In addition, by placing the deodorizing box 13 in a horizontal state, it is possible to allow the odor to flow in the horizontal direction.
In addition, by providing one or a plurality of partition plates inside the deodorizing box, odors can flow in a zigzag pattern in the vertical or horizontal direction, and a spiral shape can be provided inside the deodorizing box. By providing the partition part, it is possible to allow the odor to flow while swirling.

The desulfurizing agent 14 and the photocatalyst 15 are sequentially accommodated and arranged in the deodorizing box 13 from the intake port 19 side to the exhaust port 20 side (that is, along the axial direction of the deodorizing box body 13). Then, the layer of the photocatalyst 15 is formed on the layer of the desulfurization agent 14).
The odor generated from the septic tank 11 contains a sulfide component (hydrogen sulfide, methyl mercaptan, methyl sulfide, methyl disulfide, etc.) that causes a bad odor (a malodorous component) and an ammonia component. By removing hydrogen sulfide, which is one of the sulfide components, most of the malodorous components can be removed from the odor, but since the increase/decrease of ammonia components corresponds to the increase/decrease of hydrogen sulfide, it is possible to further reduce the malodorous components. It is also necessary to remove the ammonia component.

Therefore, after removing the sulfide component (hydrogen sulfide) from the odor by the desulfurizing agent 14, the photocatalyst 15 removes the ammonia component (residual odor component) from the odor.
As described above, the desulfurization agent 14 mainly removes hydrogen sulfide which is a sulfide component, and the photocatalyst 15 mainly removes an ammonia component, but does not prevent removal of other components (for example, the photocatalyst). 15 can also remove lower fatty acids).
In addition, since the odor from which hydrogen sulfide has been removed by the desulfurizing agent 14 is processed by the photocatalyst 15, it is possible to prevent the photocatalyst 15 from being poisoned by the sulfuric acid derived from hydrogen sulfide and deteriorating its performance. As a result, the deodorizing performance of the photocatalyst 15 can be maintained at a higher level than in the case where the odor treated with the photocatalyst is treated with the desulfurizing agent.

As the desulfurizing agent 14, limonite (limonite) containing iron oxide (FeO or the like) as a main component can be used, and specifically, Limonic (registered trademark) manufactured by Nippon Limonite Co., Ltd. can be used. Other desulfurizing agents (for example, activated carbon) can be used as long as they have a desulfurizing ability.
The desulfurizing agent 14 is formed into a cylindrical shape (granular shape), and has a diameter of, for example, about 1 to 30 mm (here, 1 to 5 mm) and a length in the axial direction of 3 to 30 mm (here, It can be set in the range of about 3 to 10 mm). The diameter and length of the desulfurizing agent can be appropriately selected according to the required desulfurizing ability, and are not particularly limited.
In this way, by making the shape of the desulfurization agent cylindrical, the surface area thereof is increased and the desulfurization ability is improved. Therefore, the shape of the desulfurizing agent is not particularly limited as long as the desulfurization ability can be increased, and the desulfurizing agent can be formed into, for example, a spherical shape (granular) or a honeycomb shape (honeycomb shape).

Titanium dioxide can be used for the photocatalyst 15. There are anatase type, rutile type, and the like in this titanium dioxide due to the difference in crystal structure, but the crystal structure is not particularly limited, and either one may be used, or a mixture thereof may be used. May be. It is preferable to use anatase type titanium dioxide when the photocatalytic function is important, and it is preferable to use rutile type titanium dioxide when the cost is important.
Further, the crystal lattice of titanium dioxide can be doped with sulfur, carbon, nitrogen or the like, and titanium dioxide is a compound of a metal complex or a metal salt of a sensitizer such as iron, copper, chromium or nickel. Can also be mixed (or supported).

The photocatalyst is not limited to the above-mentioned titanium dioxide, and a metal oxide semiconductor, a metal sulfide semiconductor, strontium titanate, cadmium selenide, potassium tantalate, or a mixture thereof may be used. it can. Here, examples of the metal oxide semiconductor include zinc oxide, tungsten oxide, cadmium oxide, indium oxide, silver oxide, manganese oxide, copper oxide, iron oxide, tin oxide, vanadium oxide, niobium oxide, and zirconium oxide. There are, for example, cadmium sulfide, zinc sulfide, indium sulfide, lead sulfide, copper sulfide, molybdenum sulfide, tungsten sulfide, antimony sulfide, and bismuth sulfide.

The photocatalyst 15 is carried by spraying a thermal spray material (here, titanium dioxide powder) on the surface of the granular treatment material (granular porous body) (that is, the thermal spray coating formed by thermal spray becomes the photocatalyst 15). ).
As the granular treatment material, a plurality of adsorbents having pores communicating with the inside thereof, for example, powders of activated carbon, zeolite, sepiolite, silica gel, etc., are molded into spherical shapes (outer diameter is about 0.5 to 5 mm). Any one kind or two or more kinds of seed pellets can be used. The granular material may have a cylindrical shape with a diameter of about 0.5 to 4 mm and a length of about 1.5 to 6 mm. In this way, by spraying the thermal spray material onto the surface of the granular treatment material, the photocatalyst 15 is subjected to the granular treatment to be granular.

The above-mentioned photocatalyst spraying method is not particularly limited as long as it is spraying, flame spraying, high-speed flame spraying, gas spraying, arc spraying, plasma spraying, electric spraying such as line explosion spraying, cold spraying and other methods. Can be used. Among them, in high-speed flame spraying, the sprayed material is sprayed in a semi-molten state and is not easily affected by heat.Because it is sprayed at a speed that is several times the speed of sound, the sprayed material bites into the granular material and the anchor effect is obtained. Since it is easy, a sprayed coating having high adhesion can be formed, which is preferable.
For forming the sprayed coating, for example, a method in which a large number of granular processing materials are stored in a bottomed cylindrical container made by processing a stainless steel net and the thermal spraying material is sprayed from the side circumferential surface direction while rotating the cylindrical container. Can be used.

The light source 16 (which may be a fluorescent lamp) irradiates the photocatalyst 15 with light (ultraviolet rays or visible light) to activate it.
The light source 16 is provided at a position on the side of the exhaust port 20 that can face the photocatalyst 15 housed in the deodorizing box 13, that is, at the bottom surface of the lid portion 18. The installation position of the light source 16 is not particularly limited as long as it can irradiate the photocatalyst 15 with light. For example, a space is formed between the layer of the desulfurizing agent 14 and the layer of the photocatalyst 15, and the light source 16 is arranged in this space. You can also
Further, sunlight can be used together with the light source 16 to irradiate the photocatalyst 15 with light (in this case, the light source 16 and the sunlight constitute a light irradiation unit). At this time, for example, it is preferable that the deodorizing box is made transparent and the lid is made transparent or mesh so that the photocatalyst 15 can be irradiated with sunlight.

The desulfurizing agent 14 and the photocatalyst 15 described above each have a deodorizing ability that decreases as they are used, so it is necessary to replace the desulfurizing agent 14 and the photocatalyst 15 within a preset period (for example, about half a year to two years). Therefore, it can be exchanged using the following method.
As shown in FIG. 1, it is preferable that the desulfurizing agent 14 and the photocatalyst 15 be housed in a net-like container 21 that is detachably mounted in the deodorizing box 13. Since this container 21 is a cartridge (integrated) containing the desulfurizing agent 14 and the photocatalyst 15, the desulfurizing agent 14 and the photocatalyst 15 can be exchanged only by replacing the cartridge (that is, the desulfurizing agent 14 and the photocatalyst 15). With the container 21). A handle (grasping part: not shown) for loading the container 21 into the deodorizing box 13 and taking it out from the deodorizing box 13 is provided on the upper part of the container 21. ..
As a result, the work of exchanging the desulfurizing agent 14 and the photocatalyst 15 can be easily performed in a short time with good workability.

Further, as the container, a reticulated bottomed container having an open top, which is detachably mounted in the deodorizing box 13, can be used, and only the desulfurizing agent 14 and the photocatalyst 15 can be exchanged. For example, when the desulfurizing agent 14 and the photocatalyst 15 are exchanged, the container is taken out of the deodorizing box 13, the used desulfurizing agent 14 and the photocatalyst 15 are taken out of the container, and the unused container is left unused. The desulfurizing agent 14 and the photocatalyst 15 are charged, and this container is charged into the deodorizing box 13.
In this case, since the layer of the desulfurization agent 14 and the layer of the photocatalyst 15 are divided in the container, it is preferable to dispose the photocatalyst 15 housed in the mesh bag on the layer of the desulfurization agent 14 filled in the container. Good.
Further, without using the above-mentioned container, for example, the desulfurizing agent 14 and the photocatalyst 15 can be filled in a mesh bag and placed in the deodorizing box 13 as it is.

From the standpoint of workability, it is preferable that the desulfurization agent 14 and the photocatalyst 15 be exchanged in accordance with the regular inspection of the septic tank 11. For example, when the regular inspection of the septic tank 11 is performed every year, assuming that the desulfurizing agent 14 and the photocatalyst 15 maintain the deodorizing ability for one year, the deodorizing box 13 has an inner diameter of about 150 mm and a container. If the inner diameter of 21 is about 130 mm, it is preferable that the layer thickness of the desulfurizing agent 14 is about 150 to 250 mm and the layer thickness of the photocatalyst 15 is about 15 to 30 mm. The thickness of each layer can be variously changed depending on, for example, the scale of the deodorizing box (inner width of the container (deodorizing box)) according to the amount of odor to be treated.
Here, when exchanging the desulfurizing agent 14 and the photocatalyst 15, a desulfurizing agent which is an unused product and a photocatalyst which is an unused product or a recycled product (for example, a product obtained by heat-treating a used photocatalyst) are used. it can.

A filter 22 is provided at a bottom position of the container 21 (position on the intake port 19 side of the desulfurization agent 14: downstream end position).
The filter 22 is made of, for example, a disc-shaped non-woven fabric made of chemical fiber, and the flow of the odor sucked into the deodorizing box 13 from the intake port 19 flows out to the exhaust port 20 side as it is by the fan 17. This makes it possible to make the flow of odors passing through the respective layers of the desulfurizing agent 14 and the photocatalyst 15 substantially uniform in the plane orthogonal to the axial direction of the deodorizing box body 13. The filter 22 can also prevent insects and the like that have entered the deodorizing box 13 from the septic tank 11 from entering the layer of the desulfurizing agent 14 and further the layer of the photocatalyst 15.
The filter 22 may not be used depending on the structure of the deodorizing box.

The filter 22 (bottom position of the desulfurizing agent 14) is located at a height position of 100 to 200 mm from the bottom surface 23 of the deodorizing box 13, and a space 24 is provided between the intake port 19 and the filter 22. By inclining the bottom surface 23, the flow of odor is made smooth.
Since the septic tank 11 treats domestic wastewater, water easily enters the deodorizing box 13 (moisture easily collects in the deodorizing box 13). Therefore, by providing the space portion 24 in the deodorizing box body 13, it becomes easier for water to return to the septic tank 11, and it is possible to prevent the water from entering the layer of the desulfurizing agent 14 and further the layer of the photocatalyst 15. It can be further prevented.
As a result, it is possible to suppress the reduction in the deodorizing ability of the desulfurizing agent 14 and the photocatalyst 15 due to the humidity.
Although the dehumidifying means can be provided in the conduit without providing the space 24 between the intake port 19 and the filter 22, it is also possible to provide the space 24 and the dehumidifying means in the conduit.

Next, a deodorizing method for the septic tank according to the first embodiment of the present invention will be described with reference to FIG.
The deodorizing method of the septic tank 11 is a method of deodorizing the odor generated from the septic tank 11 for purifying domestic wastewater by using the deodorizing device 10 for the septic tank, and a preparation step, a sulfide removing step, and an ammonia removing step. have. The details will be described below.

(Preparation process)
The septic tank deodorizing device 10 attached to the septic tank 11 via the conduit 12 is driven.
Specifically, the light source 16 and the fan 17 are driven.
A household power source can be used as this drive power source, but a battery can be provided in the septic tank deodorizing device (battery alone or in combination with a household power source). It should be noted that the battery can be charged with a household power source, but can also be charged with sunlight.

The light source 16 and the fan 17 may be continuously driven, but may be intermittently driven only when an odor is generated. Here, in the case of intermittent driving, for example, an odor sensor is provided in the conduit 12, and the light source 16 and the fan 17 are automatically driven on condition that the value of the odor sensor exceeds a preset value. Further, it is preferable that the light source 16 and the fan 17 are automatically stopped (controlled by the control unit) on condition that the value is less than a preset value.

(Sulfide removal process)
When domestic wastewater flows into the septic tank 11 and the purifying process is started in the septic tank 11, the septic tank 11 produces an odor.
This odor passes through the conduit 12 by the drive of the fan 17, and is sucked into the deodorizing box 13 through the intake port 19. As a result, the odor passes through the layer of the desulfurization agent 14, and the sulfide component that is the malodorous component in the odor is removed by the desulfurization agent 14.

(Ammonia removal process)
The odor from which the sulfide component has been removed in the sulfide removal step further passes through the layer of the photocatalyst 15.
Here, since the photocatalyst 15 is activated by the light emitted from the light source 16, the photocatalyst 15 removes the ammonia component which is the malodorous component in the odor.
By sequentially performing the sulfide removal step and the ammonia removal step in this way, the odor from which most of the malodorous components have been removed is diffused from the inside of the deodorizing box 13 to the atmosphere via the exhaust port 20.

Next, with reference to FIG. 2, a septic tank deodorizing device (hereinafter, also simply referred to as “deodorizing device”) 30 according to a second embodiment of the present invention will be described.
The deodorizing device 30 for the septic tank is connected to the septic tank 31 and is connected to the odorous pipe 32 protruding to the surface of the earth in a conduit 33, and a deodorizing device body 34 connected to the downstream end of the conduit 33. A conduit 33 (upstream of the deodorizer main body 34) provided with an insect control tank (an example of an insect control means) 35, and a deodorizing apparatus main body 34 and a water removal means 36 provided in the insect control tank 35, This device is a device for deodorizing the odor generated from the septic tank 31, and is capable of economically and efficiently deodorizing the malodorous components (sulfide component and ammonia component) in the odor generated from the septic tank 31 with a simple configuration. The details will be described below.

The septic tank 31 has the same function as the above-mentioned septic tank 11, and is installed outside the treatment area of the sewerage treatment facility, for example, a deodorant for a convenience store (small-scale retail store), a commercial facility, or a house. It is a tank. The above-mentioned commercial facilities include, for example, a drug store, a home center, a pachinko parlor, a car-related store, a restaurant, a coffee shop, a bookstore, a video rental store, and the like. There are hospitals.
In particular, when the septic tank 31 is a place where food is handled, for example, a septic tank for 50 or less tanks installed in a convenience store (a septic tank that mainly treats domestic wastewater (dirty water) discharged from the toilet), the deodorizing device The effect of 30 becomes remarkable.

The deodorizing device main body 34 has substantially the same configuration as the deodorizing device 10 described above and has the same function, and the conduit 33 of the present embodiment corresponds to the conduit 12 of the deodorizing device 10.
The insect control tank 35 has a function of mainly collecting and removing insects generated from the septic tank 31 (for example, a commercially available rainwater basin can be used), and is located upstream of the deodorizing device main body 34 (desulfurizing agent) (on the septic tank 31 side). ) Is provided in the middle of the conduit 33. This insect control tank 35 has a bottomed cylindrical shape and has a removable canopy (a space is formed inside), and conduits 33 are connected to both sides of the insect control tank 35 in a communicating state. An intake port 37 and an exhaust port 38 are provided respectively, and the height position of the exhaust port 38 is lower than that of the intake port 37.

In the insect control tank 35, a bottomed cylindrical cylindrical recovery body 39 composed of a wire mesh is housed so that it can be taken in and out with the axial center (direction in which odor flows) aligned with the vertical direction (standing state). The position of the opening 40, which is arranged and formed on the upper side of the cylindrical recovery body 39, is aligned with the intake port 37 of the insect control tank 35. In addition, the cylindrical recovery body may be formed of, for example, a punching metal, or a plastic container or bag in which a large number of through holes are formed.
As a result, the odor that has flowed into the insect removal tank 35 through the intake port 37 passes through the cylindrical recovery body 39 and then flows out through the exhaust port 38 toward the deodorizing device main body 34 side. Therefore, the insects generated from the septic tank 31 side enter the cylindrical collecting body 39 through the intake port 37 and are collected and removed from the odor, so that the insects can be prevented from entering the deodorizing device body 34, and It can be prevented.

It should be noted that the collection and removal of insects is not limited to the use of the cylindrical collector 39 described above, and various selections can be made according to the type of insect (habit: sensing light, odor, sound, etc.), for example. ..
For example, spray insecticide in advance in an insecticide tank (install a sprayer), arrange a sheet containing insecticide or a sheet with adhesiveness in advance, and perform insecticidal treatment to collect and remove insects. Can also
When insects are nocturnal, they dislike light. For example, by arranging a light source (light emitting means) in the insect control tank, it is possible to prevent insects from entering the insect control tank (inside the deodorizing device body). It can be suppressed or even prevented. On the other hand, when insects have a habit of collecting in the light, a light source may be arranged in the insect control tank and the insects collected in the light source may be treated with an insecticide or the like. In addition, when using a light source, it is also possible to use sunlight (photovoltaic power generation equipment) as electric power for starting the light source. In this case, a charger (battery) that stores the electric power obtained by sunlight Is preferably provided.

Since a lot of sludge adheres to the body of an adult worm, this worm moves in the conduit, causing sludge to be deposited everywhere, which causes new adults to be born. ..
However, as described above, by providing the insect removing tank 35 in the deodorizing device 30, the insects can be collected and removed in the insect removing tank 35, so that it is possible to suppress the accumulation of sludge everywhere as in the conventional case. It can be prevented. Therefore, the birth of new adults can be suppressed, and the deodorizing device main body 34 can be suppressed or even prevented from being contaminated with sludge.
Note that the sludge accumulated by the insects in the conduit 33 located between the septic tank 31 and the insect control tank 35 falls directly into the septic tank 31, or falls into the insect control tank 35 and is deposited, for example. The sludge in the insect control tank 35 is transferred to the septic tank 31 through the water removing means 36 (pipe) described later, for example, by cleaning the inside of the insect control tank 35 or by the sludge naturally falling. Can be sent.

The water removing means 36 is a pipe for removing the water contained in the odor (an example of the generated water) from the inside of the deodorizing device main body 34 and the inside of the insect removing tank 35 to the outside. This pipe is horizontally arranged, and its downstream end is connected to the upstream end of the conduit 33 (immediately above the odorous pipe 32) in a communicating state with the main pipe 41 and is vertically connected to this main pipe 41. It has branch pipes 42 and 43 which are connected in a state of being connected to the bottoms of the deodorizing apparatus body 34 and the insect control tank 35 in a communicating state.
Since the odor generated from the septic tank 31 contains water, water droplets in the deodorizing device main body 34 and the insect control tank 35 flow out to the branch pipes 42 and 43 and pass through the main pipe 41 to the septic tank. It is sent to 31 (drain removal). In addition, regarding dew condensation (an example of generated water) that occurs in the deodorizing device 30 (any one or more of the conduit 33, the deodorizing device main body 34, and the insect control tank 35), the branch pipes 42, 43, and , And can be sent to the septic tank 31 via the main pipe 41.

Thereby, without using a special device, the moisture (moisture contained in the odor, dew condensation, etc.) generated in the deodorizing device 30 can be transferred from the deodorizing device 30 (in the deodorizing device main body 34 and the insect control tank 35) to the outside. (Septic tank 30) can be removed. The main pipe 41 is not limited to the horizontal arrangement, and in consideration of the ease of water flow to the conduit 33 side in the main pipe, the main pipe is directed toward the conduit 33 side with a downward slope (for example, with respect to the horizontal state). It is preferable to be inclined and arranged at 1 to 10 degrees (further, the upper limit is 5 degrees).
Furthermore, by removing most of the moisture contained in the odor in the insect control tank 35, it is possible to suppress or even prevent the moisture from covering the surface of the photocatalyst in the deodorizing device main body 34, so that the deodorizing ability of the photocatalyst is improved. It can be fully demonstrated.

The water removing means 36 (pipe) described above is composed of a main pipe 41 and branch pipes 42 and 43 connected to the deodorizing device main body 34 and the insect control tank 35, respectively, depending on the amount of water contained in the odor. Thus, a branch pipe may be connected to only one of the deodorizing device body 34 and the insect control tank 35. In addition, a branch pipe may be provided in the conduit to remove water in the conduit to the outside.
As described above, considering that the deodorizing device main body 34 sufficiently exerts the deodorizing ability of the photocatalyst, a configuration in which a branch pipe is connected to at least the insect control tank 35 (a branch pipe is connected to the deodorizing device main body 34) is used. It may be omitted).

Next, a deodorizing method for the septic tank according to the second embodiment of the present invention will be described with reference to FIG.
This deodorizing method for the septic tank is a method for deodorizing the odor generated from the septic tank 31 for purifying domestic wastewater. The deodorizing method for the septic tank according to the above-described first embodiment further includes an insect removal step and water removal. Other than the addition of the steps, the steps are almost the same (because they have a preparation step, a sulfide removal step, and an ammonia removal step), and therefore different steps will be described in detail.

(Preparation process)
The deodorizing device main body 34 attached to the septic tank 31 via the conduit 33 is driven (a method similar to that of the deodorizing device 10 described above).

(Pest control process)
When domestic wastewater flows into the septic tank 31 and the purifying process is started in the septic tank 31, the septic tank 31 produces an odor. The odor passes through the conduit 33 and is sucked into the insect removal tank 35 from the intake port 37 by driving the fan 17 of the deodorizing device body 34, for example.
As a result, the odor passes through the inside of the cylindrical recovery body 39, and insects mainly contained in the odor generated from the septic tank 31 are recovered and removed by the cylindrical recovery body 39. The collected insects can be removed from the insect control tank 35 by periodically taking out the cylindrical collector 39 from the insect control tank 35 and discarding it.

(Water removal process)
Further, when the odor is sucked into the insect control tank 35, among the water contained in the odor, the water droplets drop to the bottom of the insect control tank 35 and pass through the branch pipe 43 and the main pipe 41 to form a conduit. It flows to the 33 side and flows into the septic tank 31.
Then, the odor from which a large amount of water has been removed in the insect removal tank 35 is further sucked from the exhaust port 38 of the insect removal tank 35 into the deodorizing device main body 34 via the conduit 33. Of these, the water that has become water drops falls to the bottom of the deodorizing device main body 34, flows through the branch pipe 42 and the main pipe 41 to the conduit 33 side, and flows into the septic tank 31 (the above is the condensation that occurs in the deodorizing device 30. The same).

As described above, the deodorizing device main body 34 is used for the odor in which the mixed insects are removed in the insect removing step performed before the sulfide removing step, and moreover, a large amount of water contained in the removing water is removed. By sequentially performing the sulfide removal step and the ammonia removal step described above, the odor from which most of the malodorous components have been removed is emitted from the inside of the deodorizing device main body 34 to the atmosphere via the exhaust port 20.

Next, examples carried out to confirm the effects of the present invention will be described.
Here, the result of deodorizing the odor generated from the septic tank for 40 person tank with only the desulfurizing agent (Limonic) (comparative example) and the result of sequentially deodorizing with the desulfurizing agent (Limonic) and the photocatalyst (TiO ₂ ) ( Example) will be described. The deodorizing process using only the desulfurizing agent is carried out by placing only the desulfurizing agent in the deodorizing box 13 described above, and the deodorizing process using the desulfurizing agent and the photocatalyst is performed by the intake port 19 in the deodorizing box 13. Side to the exhaust port 20 side, the desulfurizing agent and the photocatalyst were sequentially accommodated and arranged.

The result of deodorizing treatment with only the above desulfurizing agent is shown in FIG. 3(A), and the result of deodorizing treatment with the desulfurizing agent and the photocatalyst is shown in FIG. 3(B). In FIGS. 3A and 3B, the vertical axis represents the odor sensor value, and the horizontal axis represents the measurement time (elapsed time).
Each odor before and after the deodorizing process (that is, the intake port 19 and the exhaust port 20 of the deodorizing box body 13) was measured by a portable odor sensor XP-329IIIR (manufactured by New Cosmos Electric Co., Ltd.) to obtain the odor. The sensor value is indicated by the odor level value (relative value based on comparison of odors of the same quality). In addition, here, when the odor sensor value was 300 or less, it was determined that the deodorizing process was appropriately performed.

In FIG. 3(A), there were two time zones in which the odor sensor value greatly exceeded 300.
The odor sensor value in the time zone a was 633 before the deodorization treatment and 338 after the deodorization treatment, and could not be reduced to 300 or less (removal rate: 47%).
On the other hand, the odor sensor value in the time zone b was 449 before the deodorization treatment and 207 after the deodorization treatment, which was 300 or less (removal rate: 54%). It is considered that this is because the odor sensor value before the deodorization process was significantly lower than that in the time zone a.
As described above, when the deodorizing process is performed only with the desulfurizing agent, it may be impossible to properly perform the deodorizing process depending on the odor level before the deodorizing process.

In FIG. 3(B), two time zones were generated in which the odor sensor value greatly exceeded 300.
The odor sensor value in the time zone c was 528 before the deodorization treatment and 233 after the deodorization treatment, and could be 300 or less (removal rate: 56%).
On the other hand, the odor sensor value in the time zone d was 907, which was significantly higher before the deodorization treatment and was 0 after the deodorization treatment (removal rate: 100%).
As described above, when the deodorizing treatment was performed with the desulfurizing agent and the photocatalyst, the deodorizing treatment could be appropriately performed regardless of the odor level before the deodorizing treatment.

From the above, it was confirmed that the odor generated from the septic tank can be deodorized economically and efficiently with a simple configuration by using the deodorizing apparatus for the septic tank and the deodorizing method of the septic tank of the present invention.

Although the present invention has been described above with reference to the exemplary embodiments, the present invention is not limited to the configurations described in the above-described exemplary embodiments, and includes the matters described in the claims. It also includes other embodiments and modifications that are conceivable within the scope. For example, the case where the deodorizing device for a septic tank and the deodorizing method for the septic tank of the present invention are configured by combining some or all of the above-described respective embodiments and modified examples is also included in the scope of the present invention.
In the above embodiment, the case where the deodorizing device for the septic tank is placed on the ground and connected to the septic tank through the conduit has been described, but the present invention is not limited to this. For example, the deodorizing device for the septic tank is integrated with the septic tank. It can also be installed as desired.

Further, in the above-described embodiment, the case where one septic tank deodorizing device is attached to one septic tank has been described, but a plurality of septic tank deodorizing devices may be provided in series or in parallel in one septic tank.
Then, in the above-described embodiment, the desulfurizing agent and the photocatalyst are sequentially housed and arranged in the deodorizing passage from the intake port side to the exhaust port side (the ammonia removal process is performed after the sulfide removal process is performed. Although the case has been described, the desulfurizing agent and the photocatalyst can be alternately arranged from the intake port side to the exhaust port side (the sulfide removing process and the ammonia removing process are alternately performed). In this case, the position of the light irradiation means is also changed according to the position of the photocatalyst.
The deodorizing device for a septic tank can be attached to a newly manufactured septic tank (for example, a septic tank before installation in a building), or can be attached to an existing septic tank (for example, a septic tank after installation in a building). ..

The deodorizing apparatus for a septic tank and the deodorizing method for a septic tank according to the present invention can deodorize the odor generated from the septic tank economically and efficiently with a simple configuration. As a result, the deodorizing device for septic tanks and the deodorizing method for septic tanks can be effectively used in areas where domestic wastewater is purified by septic tanks. For example, the spread of foul odors to parking lots and roads can be suppressed and even prevented. Therefore, it can contribute to environmental improvement. Also, by using the deodorizing device for the septic tank, it is no longer necessary to use the odor protrusion pipe that was conventionally erected so as to project above the eaves of the roof.For example, scaffold preparation work or dismantling work when the odor protrusion pipe is installed. It is possible to reduce or even eliminate the above-mentioned problem, and it is possible to eliminate the unpleasant odor caused by the odor generated from the odor pipe.

10: deodorizing device for septic tank, 11: septic tank, 12: conduit, 13: deodorizing box (deodorizing channel), 14: desulfurizing agent, 15: photocatalyst, 16: light source (light irradiation means), 17: fan ( Deodorizing means), 18: lid part, 19: intake port, 20: exhaust port, 21: container, 22: filter, 23: bottom, 24: space part, 30: deodorizing device for septic tank, 31: septic tank, 32: Odorant pipe, 33: Conduit, 34: Deodorizing device main body, 35: Pest control tank (pest control means), 36: Water removal means, 37: Intake port, 38: Exhaust port, 39: Cylindrical recovery body, 40: Opening, 41: Main pipe, 42, 43: Branch pipe

Claims (9)

A deodorizing device for a septic tank, which is provided in a septic tank for purifying domestic wastewater and deodorizes odors generated from the septic tank,
A deodorizing box body connected to the septic tank, provided with an odor intake port at the bottom and an exhaust port at the top,
Odor sending means for sending an odor into the deodorizing box body through the intake port,
A desulfurizing agent for removing sulfide components from odor,
A photocatalyst that removes an ammonia component from the odor treated with the desulfurizing agent,
Have a light irradiating means for activating by irradiating light to the photocatalyst,
The desulfurizing agent and the photocatalyst are sequentially accommodated and arranged in the deodorizing box body from the intake port side to the exhaust port side, and the light irradiation means is arranged on the exhaust port side of the deodorizing box body,
A deodorizing device for a septic tank , wherein a filter is provided at a bottom position of the desulfurizing agent, and a space is provided between the intake port and the filter . A deodorizing device for a septic tank, which is provided in a septic tank for purifying domestic wastewater and deodorizes odors generated from the septic tank,
A deodorizing box body connected to the septic tank, provided with an odor intake port at the bottom and an exhaust port at the top,
Odor sending means for sending an odor into the deodorizing box body through the intake port,
A desulfurizing agent for removing sulfide components from odor,
A photocatalyst that removes an ammonia component from the odor treated with the desulfurizing agent,
Have a light irradiating means for activating by irradiating light to the photocatalyst,
The desulfurizing agent and the photocatalyst are sequentially accommodated and arranged in the deodorizing box body from the intake port side to the exhaust port side, and the light irradiation means is arranged on the exhaust port side of the deodorizing box body,
A space is provided between the intake port and the desulfurizing agent,
A deodorizing device for a septic tank, which is provided with an insect removing means for collecting and removing generated insects on the upstream side of the deodorizing box . In septic tank deodorizing apparatus according to claim 2, septic tank deodorizing apparatus characterized in that a filter in the bottom position before Symbol desulfurizing agent. In septic tank deodorizing device according to any one of claims 1 to 3, wherein said photocatalytic desulfurization agent is contained in a container, the container is detachably attached to the deodorizing box internal body Deodorizing device for septic tanks. The deodorizing device for a septic tank according to claim 4 , wherein the container is a cartridge containing the desulfurizing agent and the photocatalyst, and the cartridge is replaced when the desulfurizing agent and the photocatalyst are replaced. Deodorizing device. In septic tank deodorizing apparatus according to any one of claims 1 to 5, wherein the desulfurizing agent is particulate, septic tank for deodorizing apparatus, wherein the photocatalyst is processed granulated. The deodorizing device for a septic tank according to any one of claims 1 to 7 , further comprising dewatering means for removing generated water to the outside. In septic tank deodorizing apparatus according to any one of claims 1 to 7, wherein the septic tank, commercial facilities, or, septic tank deodorizing apparatus characterized by being installed in a residence. Using septic tank for deodorizing apparatus according to any one of claims 1 to 8, the odor generated from the septic tank to purify process domestic wastewater A deodorizing method for deodorizing,
Sulfide component in odor, and sulfide removal step of removing by the desulfurizing agent,
Deodorization method septic tank, characterized in that it has a ammonia removal step of removing the ammonia component from said treated with sulphide removal step odors, by the photocatalyst is activated by light emitted from the light irradiation unit.

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