JP2022160854A - Deodorization apparatus and deodorization method - Google Patents

Abstract

To provide a deodorization apparatus having high deodorization performance and being compactified and to provide a deodorization method.SOLUTION: In a deodorization apparatus having a plurality of packed beds, a plurality of water storage tanks cultivating microorganisms and a sprinkler mechanism, fillers carried with microorganisms are filled in the packed beds connected so as to flow a malodorous gas; the water storage tanks are connected so as to flow water; the sprinkler mechanism is a mechanism sprinkling water in at least one water storage tank at a downstream from an uppermost stream water storage tank to the packed beds; and the packed bed and the water storage tank are connected so that sprinkled water passing the packed bed is introduced into an upstream water storage tank from the water storage tank becoming a sprinkling water supply source.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a deodorizing device and a deodorizing method using microorganisms.

Odor is generated from livestock facilities such as pig farms, and the source of the odor is mainly livestock barns such as piggeries and manure compost. The odors emitted from these are unpleasant and strong odors (bad odors), and are the cause of complaints from neighbors. Therefore, in order to remove the odor, there is a water washing method in which odorous gases are dissolved in water using a bubbling or scrubber method, a chemical solution treatment method in which odorous components are adsorbed in a chemical solution and chemically neutralized, and a method in which sawdust and rice husks adsorb odorous components. , an ozone deodorizing method in which odorous components are decomposed by the oxidizing power of ozone. Biological deodorizing methods utilizing the decomposition of malodorous components by microorganisms include a soil deodorizing method using soil, a method using a deodorizing material in which organic matter and microbial sources are mixed with a material mainly composed of rock wool, A packed tower type biological deodorization method or the like is used in which a column is filled with a packing material (carrier) capable of retaining microorganisms, and odorous gases are passed through the packed bed to cause the microorganisms to decompose the odorous components. Among these, since the packed tower type biological deodorization method is easy to maintain and is expected to increase the density of microorganisms carried on the filler, several methods have been proposed. For example, in the method described in Patent Document 1, the deodorizing tower is filled with a packing material, the malodorous gas is introduced into the deodorizing tower and passed through the packed bed, and at that time the malodorous components contained in the malodorous gas are removed by microorganisms. Furthermore, the water pumped up from the water storage tank is sprinkled on the packed bed, and the water that has passed through the packed bed is returned to the water storage tank again to circulate the water for watering. However, it is difficult to maintain the deodorizing performance because the decomposition ability of microorganisms decreases with time after being supported on the filler. In the method described in Patent Literature 1, the ORP and pH of the water tank are controlled, and nutrients are added to the water tank to prevent deterioration of the deodorizing performance, but this was not sufficient. Moreover, in order to maintain the deodorizing performance, it has been difficult to make the device compact.

JP-A-6-99021

An object of the present invention is to provide a deodorizing device and a deodorizing method with high deodorizing performance. Another object of the present invention is to provide a compact deodorizing device and a deodorizing method.

The present inventors have started to study a deodorizing device and a deodorizing method that are excellent in deodorizing performance and can be made compact. Conventionally, a method of using a packed bed containing microorganisms for deodorization has been proposed, and water has been sprinkled on this packed bed in order to dissolve ammonia, which is an odor component. Since the water that has been sprayed and passed through the packed bed contains microorganisms, this water is stored in a water storage tank, the pH of the water storage tank is adjusted, nutrients are added, and the water stored in the water storage tank is sprinkled again. is proposed. This is an attempt to circulate water between the packed bed and the reservoir while maintaining microbial activity. However, sufficient effects have not been obtained. The present inventors have found that, rather than maintaining the activity of microorganisms in a water tank, the deodorizing effect can be improved by actively culturing and growing microorganisms and sprinkling water containing such microorganisms on a packed bed. As a result, it was found that using multiple water tanks and slowly moving the water containing microorganisms between the water tanks has an excellent culturing effect for microorganisms and enables the growth of microorganisms. Further, the inventors have found that the effect of culturing microorganisms is further improved when the relationship between the packed bed, the water tank in which the water that has passed through the packed bed is stored, and the water tank that supplies the water to be sprayed is in a specific relationship. In addition, it was found that the apparatus can be made compact because the deodorizing effect in the packed bed is greatly enhanced. Furthermore, such a deodorizing device and deodorizing method can reduce the amount of filler used because the deodorizing effect in the packed bed is greatly enhanced, and the cost required for manufacturing the device, installation work cost, and running cost due to compactness. , the labor of management and the installation space can be reduced, so that the cost of deodorizing treatment can be reduced. The present invention is thus completed.

That is, the present invention is specified by the matters shown below.
(1) A deodorizing device comprising a plurality of filling layers for passing odorous gas and deodorizing, a plurality of water tanks for culturing microorganisms, and a water spraying mechanism for spraying water in the water tanks on the filling layers. There is
The filling layer is filled with a filling material carrying microorganisms,
The packed bed is connected so that the malodorous gas flows from the most upstream packed bed into which the odorous gas is introduced to the most downstream packed bed from which the odorous gas is discharged,
The water tank is connected so that the water flows from the most upstream water tank to which the water is supplied from the outside of the deodorizing device to the most downstream water tank,
The water sprinkling mechanism is a mechanism for sprinkling water in at least one water tank downstream from the most upstream water tank to the filling layer,
A deodorizing device in which the filling layer and the water tank are connected so that the sprinkled water that has passed through the filling layer is introduced into the water tank upstream of the water tank serving as the supply source of the water to be sprinkled.
(2) The water tank serving as the supply source of water to be sprinkled and the water tank upstream from the water tank are arranged so that the water tank on the downstream side of the adjacent water tank is higher than the packed bed connected to the water tank on the upstream side. The deodorizing device according to (1) above, which is connected to a downstream packed bed.
(3) Water in a water storage tank, which is a supply source of water to be sprinkled, is sprinkled by a water sprinkling mechanism on at least one of a packed bed connected to the water tank and a packed bed upstream of the packed bed. The deodorizing device according to (2) above, characterized by:
(4) The deodorizing apparatus according to (3) above, wherein the water in the water tank is sprinkled by the water sprinkling mechanism onto a packed bed downstream of the packed bed connected to the water tank.
(5) The deodorizing device according to any one of (1) to (4) above, characterized in that a buffer chamber is provided between the packed bed and/or between the packed bed and the water tank.
(6) The deodorizing device according to any one of (1) to (5) above, wherein the filler is foamed glass having a pH of 6.5 to 8.5.
(7) The deodorizing apparatus according to any one of claims 1 to 6, further comprising a cooling device for cooling the temperature of the odorous gas introduced into the most upstream packed bed to 45°C or less.
(8) A plurality of packed towers having at least one packed bed inside are arranged in the horizontal direction, water tanks are arranged below each of the packed towers, and water sprinkled in the packed towers is sprinkled by a sprinkler mechanism. Any one of the above (1) to (7), wherein the packed tower and the water tank are arranged so that the water is introduced into the water tank below the packed tower through the packed bed in the packed tower. A deodorizing device.
And,
(9) Microorganism-carrying foam glass for use in deodorizing, having a pH of 6.5 to 8.5.
(10) A method for deodorizing odorous gas,
A plurality of packed beds filled with a filler supporting microorganisms for passing odorous gas and deodorizing, a plurality of water tanks for culturing the microorganisms, and water sprinkling for spraying the water of the water tanks on the packed beds. prepare the mechanism
connecting the packed bed so that the odorous gas flows from the most upstream packed bed into which the odorous gas is introduced to the most downstream packed bed from which the odorous gas is discharged;
connecting the water tanks so that the water flows from the most upstream water tank to which the water is supplied to the most downstream water tank;
introducing an odorous gas into the packed bed and supplying water to the water tank,
Sprinkling water in at least one water tank downstream from the most upstream water tank to the packed bed,
A deodorizing method of introducing sprinkled water that has passed through a filling layer into a water storage tank upstream of a water storage tank that supplies the water to be sprinkled.
(11) The deodorizing method according to claim 10, characterized in that after the temperature of the odorous gas is cooled to 45°C or less, the odorous gas is introduced into the packed bed.
(12) The deodorizing method according to (10) or (11) above, characterized in that the microbial material is introduced into a water tank.

The deodorizing device and deodorizing method of the present invention have excellent deodorizing performance. The deodorizing device and deodorizing method of the present invention can provide a compact deodorizing device. Moreover, the deodorizing apparatus and deodorizing method of the present invention can reduce the cost required for deodorizing.

FIG. 1 is a diagram showing one embodiment of the deodorizing device of the present invention. FIG. 2 is a diagram showing another embodiment of the deodorizing device of the present invention.

The deodorizing apparatus of the present invention comprises a plurality of filling layers for passing odorous gases to deodorize, a plurality of water tanks for culturing microorganisms, and a water sprinkling mechanism for spraying water from the water tanks onto the filling layers. In the deodorizing apparatus, the packed bed is filled with a packing material supporting microorganisms, and the packed bed is arranged from the most upstream packed bed into which the malodorous gas is introduced to the most downstream packed bed where the malodorous gas is discharged. and the water tanks are arranged so that the water flows from the most upstream water tank to which the water is supplied from the outside of the deodorizing apparatus to the most downstream water tank. , and the water sprinkling mechanism is a mechanism for sprinkling water in at least one water tank downstream from the most upstream water tank to the filling layer, and water storage upstream from the water tank serving as a supply source of the water to be sprinkled. In the deodorizing apparatus, the packed bed and the water tank are connected so that sprinkled water that has passed through the packed bed is introduced into the tank. The deodorizing device of the present invention comprises a plurality of packed beds, i.e., two or more packed beds, and the odorous gas introduced into the deodorizing device of the present invention sequentially passes through the plurality of packed beds and is discharged. . The packed bed through which the odorous gas first passes is called the most upstream packed bed, and the packed bed through which the odorous gas passes last is called the most downstream packed bed. For example, the exhaust gas (odorous gas) from the compost may have a temperature of 80° C. or higher, which may kill the microorganisms. An odor gas cooling device may be attached to the deodorizing device of the present invention. The temperature of the odorous gas introduced into the most upstream packed bed is preferably cooled to 45°C or lower, more preferably 40°C or lower, by a cooling device. The temperature of the odorous gas to be introduced is preferably adjusted to 15 to 45°C, more preferably 30 to 40°C. The deodorizing apparatus of the present invention has a plurality of water tanks, that is, two or more water tanks, and the water supplied to the deodorizing apparatus of the present invention sequentially passes through the plurality of water tanks. The first water tank is called the uppermost water tank, and the last water tank is called the most downstream water tank. Any excess water may be drained from the most downstream reservoir. The deodorizing device of the present invention has a sprinkler mechanism. The structure of the water sprinkling mechanism in the present invention is not particularly limited as long as it can sprinkle the water in the water tank onto the packed bed. It consists of a pipe for transferring water to the upper part of the packed bed, a nozzle for spraying water on the packed bed, and so on.

The packed bed in the present invention is connected so that odorous gas flows from the most upstream packed bed to the most downstream packed bed. Here, the connection means that the packed layers are connected so that the odorous gas that has passed through one packed layer flows to the next packed layer. The structure is not particularly limited. For example, a pipe for flowing odorous gas connects between the packed layers, the packed layers are arranged with a space therebetween, and the odorous gas is passed through the space. structure can be mentioned. The water tanks in the present invention are connected so that water flows from the most upstream water tank to the most downstream water tank. Here, the connection means that the water tanks are connected so that the water stored in one water tank flows into the next water tank. The structure is not particularly limited. Alternatively, a structure may be mentioned in which water tanks are arranged side by side with a wall interposed therebetween, a space is provided above the water tank and the wall, and water overflowing from the upper part of the wall flows through the space to the adjacent water tank. In the present invention, the water in at least one water tank downstream of the most upstream water tank is sprinkled onto the packed bed by the sprinkler mechanism. One or two or more water tanks for supplying water for sprinkling may be used. The number of packed beds to be watered may be one, two or more, or all packed beds. In addition, if the water in the water tank downstream of the most upstream water tank is sprinkled, the water in the most upstream water tank may be sprinkled. The packed bed and the water tank in the present invention are such that the sprinkled water that has passed through the packed bed (hereinafter also referred to as "treated water") is introduced into the water tank upstream of at least the water tank that supplies the water to be sprinkled. are connected so that Here, the connection means that the packed bed and the water tank are connected so that the water that has passed through the packed bed is introduced into the water tank. The structure is not particularly limited. can be dropped into a water tank. The packed bed and the water tank in the present invention are such that the treated water that has passed through at least one packed bed is introduced into at least one of the water tanks upstream of the water tank serving as the water supply source for watering the packed bed. As long as they are connected, there is no particular restriction as to which water tank the treated water that has passed through each packed bed is introduced into. The treated water may be introduced into the water tank that serves as the water supply source, or the treated water may be introduced into the water tank downstream of the water tank that serves as the water supply source.

In the deodorizing apparatus of the present invention, a plurality of packed towers having at least one packed bed inside are arranged in the horizontal direction, water tanks are arranged below each of the packed towers, and water is sprinkled into the packed towers by a water spraying mechanism. The packed tower and the water tank may be arranged such that water is introduced into the sprinkled water tank below the packed tower through the packed bed in the packed tower. The packed tower in the present invention is not particularly limited in its structure, shape, etc., as long as it has one or two or more packed layers inside and the odorous gas can pass through the packed layers. Shapes such as a shape and a rectangular tube shape can be mentioned, and a structure in which a filling layer is provided in the cylindrical shape can be mentioned. Further, for example, when there is one packed layer, the odorous gas can pass through one packed layer, and when there are two or more packed layers, the odorous gas can pass through each packed layer sequentially. For example, a plurality of packed beds may be arranged in a packed tower with spaces between the packed beds through which the odorous gas can pass. In this embodiment, two or more packed towers are arranged side by side in the horizontal direction, the packed towers are connected so that odorous gas flows, and the odorous gas introduction part to the packed tower having the most upstream packed bed is provided. By providing an odorous gas discharge part from the packed tower having the most downstream packed bed, each packed bed is connected to the most downstream packed bed to which the odorous gas is discharged from the most upstream packed bed to which the malodorous gas is introduced. The layers are fluidly connected to the odor gas. In this embodiment, a water tank is arranged below each packed tower. One water tank may be arranged for one packed tower so that sprinkled water passing through one packed tower is introduced into one water tank, or one water tank may be arranged for a plurality of packed towers. Then, sprinkled water that has passed through a plurality of packed towers may be introduced into one water tank. By connecting the water tanks so that water flows and providing a water supply part to the most upstream water tank, each water tank can be supplied with water from the most upstream water tank to the most downstream water tank, connected for water flow. The most downstream water tank may be provided with a water discharge section as required. In the deodorizing apparatus of this embodiment, each packed tower is installed vertically so that the packed beds provided in the packed tower are arranged in the vertical direction, and a plurality of vertically installed packed towers are arranged in the horizontal direction. Therefore, the water sprinkled on the packed tower falls through the same path as the odorous gas and is introduced into the water tank arranged below the packed tower.

Treated water, which is water sprinkled on the packed bed and passed through the packed bed, is introduced into the water tank in the present invention. Since this treated water contains some of the microorganisms in the packed bed while passing through the packed bed, the microorganisms are introduced into the water in the water tank. In addition, since the treated water contains odorous gas components such as ammonia that are nutrients for microorganisms while passing through the packed bed, nutrients for microorganisms are also introduced into the water in the water tank. Therefore, it is possible to culture microorganisms in the water tank, but if only one water tank is provided, the water in the water tank will be sprayed again on the filling layer before the microorganisms are sufficiently cultured and propagated. The effect of culturing microorganisms cannot be exhibited. In the present invention, since a plurality of water tanks are provided and water flows between the water tanks from upstream to downstream, water containing microorganisms is stored in each water tank and flows to the next water tank. Therefore, it is possible to secure the time necessary for culturing and growing the microorganisms until they are stored in the downstream water tank. And in the present invention, the water that has flowed to the downstream water tank instead of the most upstream water tank is sprinkled again on the packed bed, and the treated water is introduced into the water tank upstream of the water tank that supplies the water to be sprinkled. , the microorganisms in the treated water introduced into the upstream water tank are sufficiently cultured and proliferate until they flow into the water tank serving as the supply source of water to be sprinkled. Therefore, in the present invention, water containing a large amount of microorganisms can be sprinkled on the packed bed, and the decomposition of odorous components in the packed bed can be promoted. In general, it is said that microorganisms increase not by multiples but by multipliers when the environment is improved, and the organic decomposition (deodorization) ability is proportional to the number of microorganisms. The effect of culturing and growing microorganisms while allowing them to grow is extremely large. The microorganisms cultured in the water tank are not limited to the microorganisms contained in the treated water, but may be added in advance to the water in the water tank. You may Further, in the present invention, treated water may be sprinkled onto the odorous gas before introducing the odorous gas into the most upstream packed bed. The treated water after watering contains nutrients for microorganisms and a large amount of dissolved oxygen, so it is more suitable for culturing microorganisms.

The packed bed in the present invention is a packed bed filled with a filler carrying microorganisms. When the odorous gas passes through the filling layer, the odorous components are decomposed by the microorganisms supported on the filling material and deodorized. Microorganisms are not particularly limited as long as they decompose odorous components such as ammonia, and examples thereof include ammonia nitrifying bacteria. The filler is not particularly limited as long as it can support microorganisms, and examples thereof include rock wool, foam glass, and other porous materials. Conventionally, foam glass has not been widely used as a carrier for microorganisms for deodorization. This is because the pH of foamed glass is about 10 to 11, which is alkaline, and the microorganisms used for deodorization do not work efficiently unless the pH is in a neutral environment. This is because it has been necessary to use a foamed material or, for example, to lower the pH by sprinkling water for a certain period of time. There was an idea to use foam glass as a carrier for microorganisms for deodorization, but such a problem hindered its popularization. However, it has been found that even foam glass is far superior to conventional carriers as a carrier for microorganisms for deodorization if the pH is adjusted to about 6.5 to 8.5. Microorganism-carrying foam glass for use in deodorization with a pH of 6.5 to 8.5 has never existed before. The pH of the foam glass was measured by putting 1 L volume of foam glass calculated from the specific gravity of the foam glass into a 2 L beaker, adding 1 L of neutral (pH 7±0.1) water, and stirring for 10 minutes. After 24 hours of standing, the pH of the water can be measured with a pH meter. The pH of the foamed glass in the present invention refers to the pH measured by the above method. Foam glass is a porous material obtained by firing raw materials such as glass and additives at 700 to 1000°C and pulverizing the fired product. Adhering. The pH of foam glass is influenced by components eluted from the foam glass and the fine powdery components adhering to the surface of the foam glass. By adjusting the pH of the foamed glass to 6.5 to 8.5, it is possible to prevent the activity of microorganisms used for deodorizing from decreasing due to the influence of eluted components and adhered components. The pH of the foam glass is more preferably 6.5 to 8.0, and even more preferably 6.5 to 7.5, from the viewpoint of preventing a decrease in microbial activity and further improving microbial activity. A foam glass having a pH of 6.5 to 8.5 can be obtained by washing the foam glass with an acid such as an inorganic acid. The foamed glass for supporting microorganisms of the present invention is a use invention that finds a use for deodorizing. In particular, it has been found to be used for deodorizing odorous gases from animal husbandry facilities such as manure compost. The filler in the present invention is preferably foamed glass having a pH of 6.5 to 8.5. Foam glass with a pH of 6.5-8.5 may also be placed in the reservoir to aid in culturing the microorganisms. When rock wool is used as a filler, it is crushed when water is sprinkled on the rock wool, making it difficult for air to pass through. Normally, such a situation occurs in about three months, so replacement is required in about six months to one year to maintain performance. On the other hand, since foam glass is less likely to change shape or deteriorate, if foam glass can be used as a carrier (filler) for microorganisms for deodorizing, the running cost for replacing the filler can be reduced.

In the present invention, the water tank serving as the supply source of the water to be sprinkled and the water tank upstream from the water tank are arranged such that the water tank on the downstream side of the adjacent water tank is connected to the water tank on the upstream side from the packed bed. is also preferably connected to the downstream packed bed. The concentration of odorous components in the odorous gas passing through the packed bed is high upstream and becomes thinner as it goes downstream. Therefore, the concentration of the components that serve as nutrients for the microorganisms contained in the treated water is also high in the treated water from the upstream packed bed, and becomes thinner as it goes downstream. Therefore, the filling layer to which the downstream water tank is connected among the adjacent water tanks is arranged to be a downstream filling layer from the filling layer to which the upstream water tank is connected. Treated water containing less nutrients for microorganisms than the upstream water tank is introduced into the water tank, and conversely, treated water containing more nutrients is introduced into the upstream water tank. Microorganisms that grow in nutrient-rich upstream reservoirs are starved when transported to downstream reservoirs, where nutrients are scarce. Since starved microorganisms are most active in decomposition when they find nutrients, when water containing starved microorganisms is sprinkled on the packed bed, the microorganisms in the packed bed actively decompose odorous components, resulting in a deodorizing effect. can be further promoted. In addition, since the nutrients in the treated water introduced into the water tank gradually decrease as it goes downstream, it is possible to prevent the microorganisms from decreasing due to the sudden decrease in nutrients. There is no particular restriction on the relationship regarding the introduction of treated water between the packed bed and the water tank downstream of the water tank serving as the supply source of water to be sprinkled.

In the present invention, the water sprinkling mechanism sprinkles the water in the water tank, which is the source of the water to be sprinkled, onto at least one of the packed bed connected to the water tank and the packed bed upstream of the packed bed. is preferred. By doing so, the water in the downstream storage tank, which is highly effective in decomposing malodorous components, can be sprinkled onto the upstream packed bed through which the odorous gas containing a large amount of malodorous components passes, thereby increasing the efficiency of decomposing malodorous components. can. Furthermore, in the present invention, in addition to the above, water in another water tank serving as a supply source of water to be sprinkled is sprinkled on at least one of the packed beds downstream of the packed bed connected to the water tank. may By doing so, the water in the downstream water storage tank, which is highly effective in decomposing odorous components, is sprinkled onto the upstream filled layer through which the odorous gas containing many odorous components passes, and the water in the upstream water storage tank, which is less effective in decomposing odorous components, is sprayed. Water can be sprayed on the downstream packed bed through which the odorous gas having a small amount of odorous components passes to equalize the load and improve the efficiency of the decomposition treatment. Although the amount of water sprayed in the present invention is not particularly limited, for example, the amount of water sprayed per 1 m ³ of packed bed volume can be 0.02 to 0.1 m ³ /min.

In the present invention, it is preferred to provide a buffer chamber between the packed bed and/or between the packed bed and the reservoir. In the present invention, in order to flow the odorous gas through the plurality of packed beds, it is necessary to apply a considerable pressure to introduce the odorous gas into the deodorizing device, and there is a risk that the pressure will be unevenly applied to the packed beds. Therefore, it is preferable to equalize the pressure applied to the filling layer. By providing a buffer chamber that buffers the airflow pressure between the packed layers, the pressure of the odor gas stream entering the packed layers can be made uniform. In addition, the treated water that has passed through the packed bed is introduced into the water tank, but in the case of a structure in which the odorous gas that has passed through the packed bed hits the water surface of the water tank, if the pressure of the airflow is not uniform, it will concentrate at a specific point on the water surface. The airflow may blow the water or disturb the flow of water from one reservoir to another. Therefore, it is preferable that the water surface of the water tank is evenly exposed to the air current. By providing a buffer chamber between the filling layer and the water tank to buffer the airflow pressure, the pressure of the odor gas stream hitting the water surface of the water tank can be made uniform. The buffer chamber is a space for equalizing the pressure of the odorous gas stream. Although the volume can be appropriately selected, it is preferable that the surface of the packed bed and the water surface of the water tank, which are hit by the odorous gas stream, have the same surface area and the area of the water surface. Also, in order to equalize the pressure of the odorous gas stream, a member for equalizing the airflow can be placed between the packed bed and the buffer chamber or within the buffer chamber. Examples of the member include a plate with holes or slits, a mesh plate, and the like. When this buffer chamber is used as a passage through which the treated water passes, the treated water can contain a large amount of dissolved oxygen, which is more effective for culturing microorganisms. In the case of composting at pig farms, etc., a heater is generally built in, and the mechanism is such that the pig manure is forcibly fermented (composted). This is during a certain composting operation. If compost is fermented, the odor is still bad, but the odor is reduced. The deodorizing device of the present invention has a structure in which the number of microorganisms in the device increases or decreases according to the odor concentration (according to the increase or decrease of the nutrient source). can be widely used. In addition, not only compost from pig farming but also any odor caused by organic matter can be treated.

Nutrients for microorganisms, pH adjusters and the like may be added to the water tank in the present invention, and microorganisms may be added. Cultivation of microorganisms can be further promoted by adding nutrients or adjusting the pH to a pH suitable for culturing microorganisms. In addition, by adding microorganisms to the water tank, it is possible to replenish the microorganisms that have decreased due to death or outflow to the outside of the deodorizing apparatus, and to keep the amount of microorganisms in the water tank or in the packed bed constant. Moreover, in the natural world, degrading bacteria exist in organic matter even if the amount is very small, or degrading bacteria fly there. Since the deodorizing device of the present invention can proliferate and activate such microorganisms, it is possible to decompose malodorous components only with such local bacteria without adding microorganisms to the filling bed or water tank. There is Cultivation of microorganisms may be promoted by supplying oxygen to the water tank by aeration such as intermittent aeration. In the water tank in the present invention, measuring instruments such as pH, EC (electrical conductivity), water temperature, etc., water temperature regulators such as heaters and coolers are installed and constantly managed, and the environment of the water tank is maintained so that microorganisms can proliferate. It is preferable to create an environment suitable for By measuring the EC, the degree of contamination of the water tank can be determined. Microorganisms may die at high temperatures above 45°C, and their activity slows down at low temperatures below 15°C. Preferably, 30°C ± 3°C can be mentioned as a more preferable temperature. In addition, the deodorizing apparatus of the present invention may be provided with a measuring instrument for measuring the concentration of odor, the amount of water in the water tank, the air flow, the internal temperature of the apparatus such as the temperature of the odorous gas in the apparatus, the remaining amount of microorganisms, and the like. For example, clogging of the deodorizing device can be detected by installing an air flow meter in the exhaust pipe of the deodorizing device. By managing these measured values and adjusting each condition, it is possible to efficiently deodorize, prevent the occurrence of troubles, and quickly solve the troubles that have occurred. If these measured values are managed through the Internet line, etc., information can be shared in real time between the local user and maintenance contractors, etc., and quick response becomes possible. In addition, it is possible to collectively manage deodorizing devices in remote locations. In the deodorizing device and deodorizing method of the present invention, the microbial material may be introduced into the water tank. The microbial material in the present invention is a component that promotes culturing of microorganisms and promotes enzyme excretion from microorganisms, and examples thereof include fulvic acid and humic acid.

One embodiment of the present invention will be described with reference to FIG. In the deodorizing apparatus of FIG. 1, two packed beds are arranged vertically, and three rows of water tanks are arranged below them. Each packed layer is connected by a buffer chamber so that the odor gas flows from the first packed layer 21, which is the most upstream packed layer, to the sixth packed layer 42, which is the most downstream packed layer. Each water tank is connected by a water passage so that water flows from the first water tank 101, which is the most upstream water tank, to the third water tank 103, which is the most downstream water tank. In addition, treated water is sprinkled in the odor gas introduction passage 11 to the odor gas before it is introduced into the first filling layer 21 . In the deodorizing apparatus of FIG. 1, the deodorization in the odorous gas introduction path 11 is the first deodorization, the deodorization in the first filling layer 21 and the second filling layer 22 is the second deodorization, the third filling layer 31 and the fourth filling layer 32 are Deodorization is called third deodorization, and deodorization in the fifth and sixth filling layers 41 and 42 is called fourth deodorization. The odorous gas is introduced into the first filling layer 21 through the odorous gas introduction passage 11 and the buffer chamber S1a. The introduced odorous gas passes through the first filling layer 21, passes through the buffer chamber S1b, and is introduced into the second filling layer 22. After passing through the second filling layer 22, the odorous gas passes through the buffer chambers S1c and S2c. The odorous gas that has passed through the third packed layer 31 and passed through the third packed layer 31 is introduced into the fourth packed layer 32 through the buffer chamber S2b and passed through the fourth packed layer 32. is introduced into the fifth packing layer 41 through the buffer chambers S2a and S3a, and the odorous gas that has passed through the fifth packing layer 41 is introduced into the sixth packing layer 42 through the buffer chamber S3b, and is introduced into the sixth packing layer 42 through the buffer chamber S3b. The odorous gas that has passed through the filling layer 42 is discharged from the odorous gas discharge passage 12 through the buffer chamber S3c. A part (for example, about 20%) of the discharged deodorized gas is returned to the odor gas introduction path 11 to dilute the odor gas introduced into the deodorizing device and adjust the concentration of odor components in the odor gas to be treated. You may It may also be used to cool the odorous gas to be treated.

On the other hand, water is supplied from the water supply path 13 to the first water tank 101, the supplied water flows through the water passage 13-1 to the second water tank 102, and the water in the second water tank 102 flows into the water passage 13. -2 and flows into the third water tank 103 . The water passage 13-1 is formed by making a hole in the wall between the first water tank 101 and the second water tank 102 through which water can pass. 3. In the water tank 103 and the space above the wall between them (which also serves as buffer chambers S2a and S3a), the water in the second water tank 102 overflows the wall and flows to the third water tank 103. It is. In the deodorizing apparatus of FIG. 1 , water is made to flow from the first water tank 101 to the third water tank 103 by continuing to flow an appropriate amount of water from the water supply channel 13 . Moreover, excess water is discharged from the water discharge path 14, and when water is insufficient, the amount of water to be supplied is increased to adjust the amount of water.

The water in the third water tank 103 is pumped up by the sprinkler pump 71, passes through the sprinkler channel 7, and is sprayed from the sprinkler nozzles 72 and 73 to the packed bed. The sprinkler channel 7 is divided into three on the way, one above the second packing layer 22, the third packing layer 31 and the sixth packing layer 42, and one above the first packing layer 21, the fourth packing layer 32 and Above the fifth filling layer 41 , one leads above the odor gas introduction path 11 . In the deodorizing apparatus of FIG. 1, the water in the third water tank 103, which is the most downstream water tank, is sprinkled over all the packed layers. The water that has passed through the second packed layer 22 and the first packed layer 21 is introduced into the first water tank 101 by dropping down through the buffer chamber S1a (also serving as a treated water passage). Similarly, the water that has passed through the third packed layer 31 and the fourth packed layer 32 is introduced into the second water tank 102 by dropping down through the buffer chamber S2a (which also serves as a treated water passage). The water that has passed through the packed layer 42 and the fifth packed layer 41 is introduced into the third water tank 103 by dropping down through the buffer chamber S3a (which also serves as a treated water passage). In the deodorizing apparatus of FIG. 1, the water (treated water) that has passed through the packed bed is introduced into the water tank upstream of the third water tank 103 serving as the supply source of the water to be sprinkled, and is also introduced into the third water tank 103. have been introduced. In addition, in the third water tank 103 and the water tanks 101 and 102 upstream thereof, the water tank on the downstream side of the adjacent water tanks is connected to the packed bed downstream of the packed bed connected to the upstream water tank. It is After the treated water introduced into each water tank is stored in each water tank, it flows to the downstream water tank and reaches the third water tank 103 . Then, the water in the third water tank 103 is sprinkled on the packed bed again, and thus the water circulates between the water tank and the packed bed. Each water tank is aerated by aeration pipes 15-1 and 15-2 to prepare an environment suitable for culturing microorganisms. In addition, foam glass 16 is put into each water tank to prepare an environment in which microorganisms can grow more easily.

In the deodorizing apparatus of FIG. 1, the treated water introduced into the first water tank 101 contains the most nutrients and the most microorganisms. This treated water is introduced into the first water tank 101 to start the cycle of culturing microorganisms, and as it moves to the second water tank 102 and the third water tank 103, the culture progresses stably. On the other hand, the growth of microorganisms reduces the nutrients, and the nutrients in the treated water introduced also decrease as it goes to the downstream water storage tanks, so the third water storage tank 103 contains many multiplied microorganisms. However, there is little nutrients and water accumulates. Microorganisms contained in this water are in a so-called hunger-seeking state in which they seek food. In the deodorizing apparatus of FIG. 1, the volume of the packed bed is reduced as the second, third, and fourth deodorizing steps progress. This is because the deodorization corresponding to the concentration of the odor component (the concentration of the odor component decreases from the second deodorization to the fourth deodorization) is performed. good. Microorganisms or microbial materials may be added to the reservoir as desired, and this addition may be automatic or manual.

Another embodiment of the present invention will be described with reference to FIG. The odorous gas is introduced into the first filling layer B1 through the odorous gas introduction path 11 . The introduced odorous gas passes through the first packing layer B1, the second packing layer B2, the third packing layer C2, the fourth packing layer C1, the fifth packing layer D1, the sixth packing layer D2, and the seventh packing layer. E2, the eighth packed layer E1, the ninth packed layer F1, the tenth packed layer F2, and the downstream packed layers in this order are discharged from the odorous gas discharge path 12. FIG. Buffer chambers are provided between the packed layers as in the deodorizing apparatus of FIG. On the other hand, water is supplied from the water supply path 13 to the first water tank 101, the supplied water flows through the water passage 13-1 to the second water tank 102, and the water in the second water tank 102 flows through the water passage. 13-2 to the third water tank 103, the water in the third water tank 103 flows to the fourth water tank 104 through the water passage 13-3, and the water in the fourth water tank 104 flows to the water passage 13- 4 into the fifth water tank 105 . In the water passages 13-1 and 13-3, the walls between the water tanks are provided with holes through which water passes. water is moving due to overflow.

The water in the first water tank 101 is sprinkled on the sixth packed bed D2 and the fifth packed bed D1 through the sprinkler channel 7-3. The water in the second water tank 102 is sprinkled on the third packed layer C2 and the fourth packed layer C1 through the sprinkler channel 7-2. The water in the third water tank 103 is sprinkled on the second packed bed B2 and the first packed bed B1 through the sprinkler channel 7-1. The sprinkler channels 7-1, 7-2 and 7-3 are divided into two on the way, one above the second packing layer B2, the third packing layer C2 and the sixth packing layer D2 respectively, and the other above the first packing layer D2 respectively. It communicates above the filling layer B1, the fourth filling layer C1 and the fifth filling layer D1. Also, the water in the fifth water tank 105 is sprinkled through the sprinkler channel 7-4 to the seventh packed layer E2, the eighth packed layer E1, the tenth packed layer F2 and the ninth packed layer F1. The sprinkler channel 7-4 is divided into three along the way, one above the seventh and tenth packing layers E2 and F2, one above the eighth and ninth packing layers E1 and F1, and one above the eighth and ninth packing layers E1 and F1. One is connected to the odor gas introduction path 11 . The water sprinkled on the second packed bed B2 and the first packed bed B1 is introduced by passing through each packed bed and dropping into the first water tank 101 . Similarly, the water sprinkled on the third packed layer C2 and the fourth packed layer C1, the water sprinkled on the sixth packed layer D2 and the fifth packed layer D1, the seventh packed layer E2 and the eighth packed layer E1. The water sprinkled on the tenth packed layer F2 and the water sprinkled on the ninth packed layer F1 drop into the second water tank 102, the third water tank 103, the fourth water tank 104, and the fifth water tank 105, respectively. be introduced.

The water in the third water tank 103 is sprinkled on the second packed bed B2 and the first packed bed B1 upstream of the sixth packed bed D2 and the fifth packed bed D1 to which the third water tank 103 is connected. The water in the first water tank 101 is sprinkled on the sixth packed layer D2 and the fifth packed layer D1 downstream of the second packed layer B2 and the first packed layer B1 to which the first water tank 101 is connected. The water in the water tank 102 is sprinkled on the third packed layer C2 and the fourth packed layer C1 to which the second water tank 102 is connected. For this reason, the water having the highest ability to decompose odorous components in the first water tank 101 to the third water tank 103 is sprinkled over the packed bed with the highest amount of odorous components (highest load), and the water having the highest ability to decompose odorous components. Since the water with the lowest odor component can be sprinkled on the packed bed with the least odor component (lowest load), the load can be made uniform and the efficiency of the decomposition treatment can be improved. In addition, the odorous gas flowing from the seventh packed layer E2 to the downstream packed layer has been deodorized to some extent and has less odorous components. Therefore, although the amount of nutrients and microorganisms in the treated water introduced into the fourth water tank 104 and the fifth water tank 105 is not so large, the seventh to tenth packed layers E2 to F2, which contain few odorous components, contain the fifth By sprinkling the water in the water tank 105, the odorous components can be sufficiently decomposed.

Deodorization was carried out using the deodorizing apparatus of the type shown in FIG. The size of the deodorizing device was 1100 mm wide×600 mm deep×1400 mm high, the total capacity of the filling layer in the deodorizing device was 0.60 m ³ , and pH 7 foam glass was used as the filling material. 43 m ³ of malodorous gas from swine compost was cooled to 40° C. and introduced into this deodorizing apparatus at a flow rate of 1.5 m ³ /min. The amount of water sprayed to each packed bed was 0.0042 m ³ /min. The amount of water in ^each reservoir was about 0.1 m3 respectively. About 0.03 m ³ of foam glass was put into each water tank. Air was sent into the water in each water tank by a microbubble generator. Table 1 shows the results. The odor concentration (ammonia concentration) of the exhaust gas from the compost during the composting operation, which is a fermentation process, was 1000 ppm or more (because it exceeded the detection range of the measuring instrument, it was not possible to measure a concentration higher than that), but from the deodorizing device. The odor concentration of the exhaust gas was reduced to an extremely low value of 20 ppm. Also, the odor concentration in the exhaust air from the compost at the completion of the compost fermentation was 300 ppm, but the odor concentration in the exhaust air from the deodorizer decreased to an extremely low value of 15 ppm. As described above, the deodorizing apparatus of the present invention was able to perform appropriate deodorizing treatment according to the odor concentration over a wide range of odor concentrations, and had an excellent deodorizing effect in spite of being extremely compact. This deodorizing device was about 1/5 to 1/50 the size of a conventional device of equivalent capacity.

INDUSTRIAL APPLICABILITY The deodorizing apparatus and deodorizing method of the present invention can be used for various deodorizing purposes, particularly suitable for deodorizing strong odors from livestock facilities such as pig farming and poultry farming, and is also suitable for deodorizing compost. In addition to odors from livestock facilities, it is also possible to deal with odorous gases from any facility or odor source as long as it is caused by organic substances. It can also be used for deodorizing.

11 Odor gas introduction path 12 Odor gas discharge path 13 Water supply path 13-1 Water path 13-2 Water path 14 Water discharge path 15-1 Aeration pipe 15-2 Aeration pipe 16 Foam glass 21 First packed layer 22 Second 2nd packed layer 31 3rd packed layer 32 4th packed layer 41 5th packed layer 42 6th packed layer 7 sprinkler channel 7-1 sprinkler channel 7-2 sprinkler channel 7-3 sprinkler channel 7-4 sprinkler channel 71 sprinkler pump 72 Water nozzle 73 Water nozzle 101 First water tank (A water tank)
102 second water tank (B water tank)
103 third water tank (C water tank)
104 Fourth water tank (D water tank)
105 5th water tank (E water tank)
S1a buffer chamber (treated water passage)
S1b buffer chamber (treated water passage)
S1c buffer chamber S2a buffer chamber (treated water passage)
S2b buffer chamber (treated water passage)
S2c buffer chamber S3a buffer chamber (treated water passage)
S3b buffer chamber (treated water passage)
S3c buffer chamber B1 1st packing layer B2 2nd packing layer C2 3rd packing layer C1 4th packing layer D1 5th packing layer D2 6th packing layer E2 7th packing layer E1 8th packing layer F1 9th packing layer F2 No. 10 packed layers

Claims (12)

A deodorizing device comprising: a plurality of filled layers for passing odorous gas and deodorizing; a plurality of water tanks for culturing microorganisms;
The filling layer is filled with a filling material carrying microorganisms,
The packed bed is connected so that the malodorous gas flows from the most upstream packed bed into which the odorous gas is introduced to the most downstream packed bed from which the odorous gas is discharged,
The water tank is connected so that the water flows from the most upstream water tank to which the water is supplied from the outside of the deodorizing device to the most downstream water tank,
The water sprinkling mechanism is a mechanism for sprinkling water in at least one water tank downstream from the most upstream water tank to the filling layer,
A deodorizing device in which the filling layer and the water tank are connected so that the sprinkled water that has passed through the filling layer is introduced into the water tank upstream of the water tank serving as the supply source of the water to be sprinkled. The water tank serving as the supply source of the water to be sprinkled and the water tank upstream of the water tank are arranged such that the water tank on the downstream side of the adjacent water tank is located downstream of the filling layer connected to the water tank on the upstream side. 2. A deodorizing device according to claim 1, characterized in that it is connected to the layer. A water sprinkling mechanism sprinkles water in a water tank serving as a supply source of water to be sprinkled onto at least one of a packed bed connected to the water tank and a packed bed upstream of the packed bed. The deodorizing device according to claim 2. 4. The deodorizing device according to claim 3, wherein the water in the water tank is further sprinkled to the filling layer downstream of the filling layer connected to the water tank by the water spraying mechanism. A deodorizing device according to any one of claims 1 to 4, characterized in that a buffer chamber is provided between the packed bed and/or between the packed bed and the water tank. The deodorizing device according to any one of claims 1 to 5, wherein the filler is foamed glass having a pH of 6.5 to 8.5. The deodorizing apparatus according to any one of claims 1 to 6, further comprising a cooling device for cooling the temperature of the odorous gas introduced into the most upstream packed layer to 45°C or less. A plurality of packed towers having at least one packed bed inside are arranged in the horizontal direction, a water tank is arranged below each of the packed towers, and the packed tower is sprinkled with water sprinkled into the packed tower by a sprinkler mechanism. The deodorizing apparatus according to any one of claims 1 to 7, wherein the packed tower and the water tank are arranged so that the water is introduced into the water tank below the tower through the packed bed in the packed tower.
And, A microorganism-carrying foam glass for deodorizing, having a pH of 6.5 to 8.5. A method for deodorizing odorous gas,
A plurality of packed beds filled with a filler supporting microorganisms for passing odorous gas and deodorizing, a plurality of water tanks for culturing the microorganisms, and water sprinkling for spraying the water of the water tanks on the packed beds. prepare the mechanism
connecting the packed bed so that the odorous gas flows from the most upstream packed bed into which the odorous gas is introduced to the most downstream packed bed from which the odorous gas is discharged;
connecting the water tanks so that the water flows from the most upstream water tank to which the water is supplied to the most downstream water tank;
introducing an odorous gas into the packed bed and supplying water to the water tank,
Sprinkling water in at least one water tank downstream from the most upstream water tank to the packed bed,
A deodorizing method of introducing sprinkled water that has passed through a filling layer into a water storage tank upstream of a water storage tank that supplies the water to be sprinkled. 11. The deodorizing method according to claim 10, wherein the odorous gas is introduced into the packed bed after the temperature of the malodorous gas is cooled to 45[deg.] C. or less. 12. The deodorizing method according to claim 10, wherein the microbial material is introduced into the water tank.

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