JP2022142743A - Dust removal deodorization system, livestock barn and dust removal deodorization method - Google Patents

Abstract

To provide a dust removal deodorization system for preventing a harmful effect to a water tank part while effectively reducing an odorous component in the air discharged to the outside of a facility from the inside of the facility.SOLUTION: A dust removal deodorization system, used when discharging air in a facility to the outside of the facility by forming an air current toward the outside of the facility from the inside of the facility, has a plurality of filters arranged in order from an upstream side of the air current and performing a dust removal and/or deodorization and a plurality of units corresponding the filters, where a biofilm by a microorganism useful for deodorization is formed at least one of the filters. The unit has a water sprinkling part for sprinkling water to the filter, a water tank part for storing water dropping from the filter, a water transfer part for sending water stored in the water tank part to the water sprinkling part, a discharge part for discharging the water stored in the water tank part and a water quality measurement part for measuring electric conductivity and/or a hydrogen ion exponent of the water stored in the water tank part.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a dust and odor removal system, a livestock barn, and a dust and odor removal method. More specifically, the present invention relates to a dust and odor removing system, a livestock barn, and a dust and odor removing method having a plurality of filters, one or more of which has a biofilm formed by useful microorganisms.

BACKGROUND ART In recent years, offensive odors generated in livestock farming, agriculture, and the like have often become a problem. For example, in the case of pig farming, there are many cases where pig farming is conducted in the vicinity of urban areas, and bad odors tend to be a problem.

In response to this, pig farms, for example, employ measures such as efforts to clean and dry the floor of the piggery and rapid separation of feces and urine as countermeasures against odors. As other deodorizing means, a method of adsorbing odorous components with an adsorbent, a method of deodorizing using chemical agents, enzymes, ozone gas, etc. are being studied.

For example, Patent Literature 1 discloses a dust and odor removal system, a livestock barn, and a dust and odor removal method that simply, inexpensively, and effectively reduce odorous components in the air discharged from facilities such as barns to the outside of the facilities. .

JP 2006-341249 A

The technique disclosed in Patent Document 1 is a useful technique for removing dust in the air and reducing odorous components in the air.

However, in recent technological developments, it has become clear that if the technology disclosed in Patent Document 1 is used, the acidity of the water stored in the water tank may increase, which may adversely affect the water tank. rice field.

Therefore, in the present invention, there is provided a dust and odor removal system that can easily, inexpensively, and effectively reduce odorous components in the air discharged from facilities such as livestock barns to the outside of the facilities, while preventing adverse effects on the water tank. and to provide a dust removal and deodorization method.

The present invention is a dust removal and deodorization system that is used to form an airflow from inside a facility to outside the facility and discharge the air in the facility to the outside of the facility, and is arranged in order from the upstream side of the airflow to remove dust and/or Alternatively, a plurality of filters for deodorizing and a plurality of units corresponding to the filters are provided, at least one of the filters has a biofilm formed by microorganisms useful for deodorization, and the units are a water sprinkling part for sprinkling water on the filter, a water tank part for storing water falling from the filter, a water transfer part for sending the water stored in the water tank part to the water sprinkling part, and discharging the water stored in the water tank part. and a water quality measuring unit for measuring electrical conductivity and/or hydrogen ion exponent of water stored in the water tank, wherein the discharging unit measures the electrical conductivity and/or the hydrogen ion To provide a dust removal and deodorization system for discharging said water when a measured value of an index is out of a predetermined range.
A drainage amount, which is the amount of water discharged by the discharge unit, may be set in a plurality of stages, and the measured value may be associated with the drainage amount.
A water transfer amount, which is the amount of water sent by the water transfer unit, may be associated with the measured value.
The dust removal and deodorization system may further include a communication unit that transmits the measured values of the electrical conductivity and/or the hydrogen ion exponent to the outside of the facility via an information communication network.
The apparatus may further include a drainage measurement unit that measures a drainage amount, which is the amount of water discharged by the discharge unit, and the communication unit may transmit the measured value of the drainage amount to outside the facility via an information communication network. .
The dust and odor removal system may further include a corrector that corrects the measured value of the hydrogen ion exponent.
At least one of the plurality of units may be provided with the water quality measuring unit.
In addition, the present invention provides a livestock barn equipped with the dust removing and deodorizing system.
The present invention also provides a dust and odor removal method using the dust and odor removal system.

In the present invention, "useful microorganisms" are microorganisms that decompose dust, odorous components, and the like. Beneficial microorganisms according to the present invention include bacteria of the cytophaga group, nitrifying bacteria, and the like. These bacteria always exist inside and outside facilities such as livestock barns.

"Cytophaga complex" is the name for a taxonomic group of bacteria that includes multiple genera of bacteria. Bacteria belonging to major genera of the cytophaga group are known to be aerobic and grow by degrading polysaccharides (cellulose or chitin).

"Nitrifying bacteria" is a general term for a group of bacteria that oxidize reduced inorganic nitrogen compounds (NH4+, NO2-) under aerobic conditions, and includes, for example, ammonia-oxidizing bacteria and nitrite-oxidizing bacteria. Ammonia-oxidizing bacteria are autotrophic bacteria such as bacteria of the genus Nitrosomonas and bacteria of the genus Nitrosospira that oxidize ammonia into nitrous acid. Nitrite-oxidizing bacteria are autotrophic bacteria, such as Nitrobacter spp., that oxidize nitrite to nitrate.

INDUSTRIAL APPLICABILITY According to the present invention, a dust removal and deodorization system and a livestock barn which can easily, inexpensively, and effectively reduce odorous components in the air discharged from inside a facility such as a livestock barn to the outside of the facility while preventing adverse effects on a water tank. , and a dust removal and deodorization method can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is a side schematic diagram which shows the structure of the dust removal and deodorization system A which concerns on one Embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the structure of the dust removal and deodorization system A which concerns on one Embodiment of this invention. It is a flow chart which shows an example of a procedure of dust removal and deodorization system A concerning one embodiment of the present invention. It is an example of a data table stored in the dust and odor removal system A according to one embodiment of the present invention. It is a flow chart which shows an example of a procedure of dust removal and deodorization system A concerning one embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the structure of the dust removal and deodorization system A which concerns on one Embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the structure of the dust removal and deodorization system A which concerns on one Embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the structure of the dust removal and deodorization system A which concerns on one Embodiment of this invention. It is a flow chart which shows an example of a procedure of dust removal and deodorization system A concerning one embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a side schematic diagram which shows the structure of the dust removal and deodorization system A which concerns on one Embodiment of this invention. It is a flow chart which shows an example of a procedure of dust removal and deodorization system A concerning one embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic diagram which showed an example in the case of installing the dust removal and deodorization system A which concerns on this invention in a livestock barn.

Preferred embodiments for carrying out the present invention will be described below with reference to the accompanying drawings. The embodiments described below are representative embodiments of the present invention, and the scope of the present invention is not limited to these embodiments. Moreover, in each figure, the same code|symbol is attached|subjected to the substantially same component, and the overlapping description may be abbreviate|omitted or simplified.

The description of the present invention is presented in the following order.
1. First embodiment according to the present invention (Example 1 of dust removal and deodorization system)
(1) Overview of this system (2) Filter (3) Structure of this system 2. Second embodiment according to the present invention (example 2 of dust removal and deodorization system)
3. Third embodiment according to the present invention (example 3 of dust removal and deodorization system)
4. Fourth embodiment according to the present invention (example 4 of dust removal and deodorization system)
5. Fifth embodiment according to the present invention (example 5 of dust removal and deodorization system)
6. Sixth embodiment according to the present invention (example 6 of dust removal and deodorization system)
7. Seventh embodiment (livestock barn) according to the present invention

<1. First Embodiment According to the Present Invention (Example 1 of Dust Removal and Deodorization System)>
<(1) Outline of this system>
The dust removal and deodorization system according to the present invention is used when forming an airflow directed from inside the facility to outside the facility and discharging the air inside the facility to the outside of the facility. A configuration of a dust removal and deodorization system according to one embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic side view showing the configuration of a dust removing and deodorizing system A according to one embodiment of the present invention.

As shown in FIG. 1, a dust and odor removing system A according to one embodiment of the present invention includes a plurality of filters arranged in order from the upstream side of the airflow for removing dust and/or deodorizing. Although the number of the plurality of filters is not particularly limited, it may be two, for example. In this embodiment, the dust and odor removal system A includes a first filter 11 and a second filter 21. As shown in FIG.

Further, the dust removal and deodorization system A includes a plurality of units corresponding to the filters. In this embodiment, the dust and odor removal system A includes a first unit 1 and a second unit 2 .

At least one of the filters has a biofilm formed by microorganisms useful for deodorization.

The first unit 1 includes a first water spraying section 12 for spraying water W11 on a first filter 11, a first water tank section 13 for storing water W12 falling from the first filter 11, and a first A first water transfer section 14 for sending water W13 stored in the water tank section 13 to the first sprinkler section 12, a discharge section 16 for discharging the water W13 stored in the first water tank section 13, and the first water tank section. and a water quality measuring unit 15 for measuring the electric conductivity and/or the hydrogen ion exponent (pH) of the water W13 stored in the water W13.

The discharge unit 16 discharges the water W13 when the measured value of the electrical conductivity and/or the hydrogen ion exponent is out of the predetermined range.

The second unit 2 includes a second sprinkler section 22 that sprinkles water W21 onto the second filter 21, a second water tank section 23 that stores the water W22 falling from the second filter 22, and a second and a second water transfer section 24 for sending water W23 stored in the water tank section 23 to the second sprinkler section 22 .

Although illustration is omitted, the second unit 2 may have a second discharge section for discharging the water W23 stored in the second water tank section 23, or the second water tank section 23 may It may have a second water quality measuring unit for measuring the electrical conductivity and/or the hydrogen ion exponent of the stored water W23.

Moreover, the sprinklers (12, 22), the water tanks (13, 23), and the water transfer sections (14, 24) do not have to be provided for each unit, and are provided so as to be shared by the respective units. may have been However, the first filter 11 and the second filter 21 are different from each other in terms of the microflora when the biofilm is formed, the environment inside the filter, and the like. Therefore, it is more preferable to provide each unit.

The operation of the dust removal and deodorization system A will be described. An airflow X is formed from inside the facility to outside the facility by an exhaust fan or the like. The airflow X passes through the first filter 11 and the second filter 21 in order. The first filter 11 and the second filter 21 remove dust and/or deodorize the airflow X.

The first filter 11 arranged on the upstream side of the airflow mainly adsorbs and/or decomposes dust and converts ammonia into nitrate nitrogen. The second filter 21 mainly converts ammonia to nitrate nitrogen and adsorbs and/or decomposes other odor components. This reduces the amount of odor components (bad odors emitted into the air) that are discharged from the inside of the facility to the outside of the facility.

<(2) Filter>
On each of the first filter 11 and the second filter 21, biofilms are formed and fixed by useful microorganisms and the like. For example, when this dust removal and deodorization system A is used in livestock houses such as pig houses and chicken houses, composting facilities, sewage treatment facilities, etc., the filter environment (for example, temperature, moisture, oxygen, carbon sources, other nutrient sources, etc.) By operating the dust removal and deodorization system A while maintaining the temperature, useful microorganisms present in the facility naturally form biofilms on the first filter 11 and the second filter 21 and settle there.

In addition, for example, a solution containing useful microorganisms may be added to the stored water W13, W23, or the like, depending on the installation location of the present system. Alternatively, a viable powder of useful microorganisms or the like may be sprayed on each of the first filter 11 and the second filter 21 .

In this system, since biological treatment is performed under aerobic conditions, beneficial microorganisms involved in deodorization can be preferentially propagated.

Beneficial microorganisms, mainly Cytophaga, can form a biofilm and aerobically settle and/or proliferate on the filter. The useful microorganisms adsorb high-molecular organic matter such as dust to the biofilm, and gradually decompose the dust and the like adsorbed to the biofilm. Therefore, useful microorganisms can sufficiently adsorb and/or decompose dust even if the contact time between the filter and dust is short. Therefore, the deodorizing ability is high.

Nitrosomonas, Nitrosospira, and other nitrifying bacteria take in odorous components such as ammonia into the microbial body, oxidatively decompose the odorous components, and convert them into carbon dioxide, water, nitrate ions, sulfate ions, etc. Deodorize.

Each of the first filter 11 and the second filter 21 can be applied as long as it can form a biofilm, and is not limited by its material, structure, and the like. Each of the first filter 11 and the second filter 21 may contain, for example, nonwoven fabric, paper, plastic, porous material, mesh-like net body, and the like. In particular, a honeycomb paper filter, for example, is easy to form a biofilm by useful microorganisms, etc., and is easy for useful microorganisms to settle. It is particularly suitable because it is easy to use, because the surface area is large, odor components and microorganisms easily come into contact, and it is easy to maintain aerobic conditions in the biofilm.

Note that the dust removal and deodorization system according to the present invention may include three or more filters. For example, a photocatalyst filter may be provided on the most downstream side of the airflow. At this time, for example, the photocatalyst filter can be installed in a place exposed to sunlight, or a light irradiation means (such as a black light) can be provided separately.

As a photocatalyst filter, for example, a filter made by adding a photocatalyst substance (such as titanium oxide) to the filter material (non-woven fabric, etc.) in advance, or a filter made by applying a photocatalyst substance to the surface of the filter, etc. can be done.

For example, when a photocatalyst filter is installed as the third filter on the most downstream side of the airflow, a small amount of odorous components remaining after passing through the first filter 11 and the second filter 21 are decomposed and / or removed by photocatalysis. can. Therefore, there is an advantage that the dust removing and/or deodorizing effect can be increased.

In particular, photocatalytic substances generally decompose the target substance more effectively when the substance is present in trace amounts. Therefore, with this configuration, most of the dust and odorous components can be decomposed and/or removed in advance in the first filter 11 and the second filter 21, so that the remaining odorous components can be removed in the photocatalyst filter. , can be resolved more efficiently.

In addition, when a photocatalyst filter is installed on the most downstream side of the airflow, the first filter 11 and the second filter 21 can decompose and / or remove dust and odor components in advance, so clogging and deterioration of the photocatalyst filter can be prevented, and the photocatalytic action can be maintained for a long period of time.

The first sprinkler 12 sprinkles water W11 onto the first filter 11 . The second sprinkler 22 sprinkles water W21 onto the second filter 21 . As a result, it is possible to maintain favorable growth environments for microorganisms that have settled on each of the first filter 11 and the second filter 21 . In addition, this makes it possible to circulate and/or remove dust that has not been adsorbed to the biofilm, metabolites (unnecessary products) of microorganisms that have settled on each of the first filter 11 and the second filter 21, and the like.

In general, nitrifying bacteria and bacteria of the cytophaga group grow well under relatively high temperature, high humidity and aerobic conditions. In this dust removal and deodorization system A, since the first water sprinkling unit 12 and the second water sprinkling unit 22 can sprinkle high dissolved oxygen water at an appropriate temperature, each of the first filter 11 and the second filter 21 is aerobic. And it can be kept in a high humidity state. Therefore, it is effective for the formation and retention of biofilms, and the colonization and proliferation of useful microorganisms.

In general, the temperature in the livestock barn is adjusted to a temperature suitable for the growth of animals. Therefore, when this dust removing and deodorizing system A is used in a livestock barn, the temperature inside the dust removing and deodorizing system A is often able to naturally maintain the optimum temperature for microorganisms. In addition, for example, a heating means (not shown) or the like is attached to each of the first water spray unit 12 and the second water spray unit 22, and the temperature of the water W11 and water W21 to be sprayed is adjusted. Filter 11 and second filter 21 may be adjusted to optimum temperature conditions.

<(3) Configuration of this system>
The water sprayed from each of the first water sprayer 12 and the second water sprayer 22 is circulated and reused. This allows the biofilm to be maintained in an optimal state and significantly reduces the amount of water used.

In addition, each of the first water transfer section 14 and the second water transfer section 24 has, for example, a pump (not shown) and a water pipe (first water pipe 141 and second water pipe 241). can be At this time, the water pumped up can be sent to each of the first water spray section 12 and the second water spray section 22 via the water pipe.

Here, the configuration of the dust removal and deodorization system A will be described with reference to FIG. FIG. 2 is a block diagram showing the configuration of a dust removing and deodorizing system A according to one embodiment of the present invention.

As shown in FIG. 2 , the dust and odor removal system A can include a water quality measurement unit 15 , a calculation unit 41 , a storage unit 43 and a control unit 42 .

The water quality measuring unit 15 measures the electric conductivity and/or hydrogen ion exponent of the water W13 stored in the first water tank unit 13 . The computation unit 41 computes the amount of drainage based on the values measured by the water quality measurement unit 15 . Information required for this calculation is stored in the storage unit 43 . The discharge unit 16 discharges the calculated amount of water. A control unit 42 controls the operation of each component. Note that the calculation unit 41, the control unit 42, and the like can be realized by using, for example, a CPU provided in a computer.

The discharge portion 16 discharges the water W13 stored in the first water tank portion 13 . In particular, the discharge unit 16 discharges the water W13 when the measured value of the electrical conductivity and/or the hydrogen ion exponent is out of the predetermined range. Alternatively, the discharge unit 16 changes the discharge amount of the already discharged water W13 when the measured value of the electrical conductivity and/or the hydrogen ion exponent is out of the predetermined range.

This will be further described with reference to FIG. FIG. 3 is a flow chart showing an example of the procedure of the dust and odor removal system A according to one embodiment of the present invention.

As shown in FIG. 3, the water quality measurement unit 15 measures the electrical conductivity (EC) of the water W13 stored in the first water tank unit 13 (step S11). Next, the water quality measurement unit 15 measures the hydrogen ion index (pH: potential of Hydrogen) of the water W13 stored in the first water tank unit 13 (step S12).

Note that the water quality measurement unit 15 may measure only one of EC and pH. Also, the water quality measuring unit 15 may measure the EC and/or pH of the water W23 stored in the second water tank unit 23 . The same applies to the following flowcharts.

Next, the calculation unit 41 determines whether or not the measured EC and/or pH are outside the predetermined range (step S13).

Then, when the measured EC and/or pH are outside the predetermined range (step S13: Yes), the discharge unit 16 discharges water W13 (step S14). Alternatively, although not shown, the discharge unit 16 may change the discharge amount of the already discharged water W13. Strictly speaking, the controller 42 instructs the discharger 16 to discharge the water W13. The same applies to the following flowcharts.

By discharging the water W13 based on the electrical conductivity, it is possible to monitor or adjust the turbidity of the circulating water.

Further, by discharging the water W13 based on the hydrogen ion exponent, corrosion of the concrete can be prevented, for example, when the water tank contains concrete. Concrete has a hydrogen ion index of 12-13 and is highly alkaline. Therefore, when the hydrogen ion index of the water stored in the water tank decreases, the concrete may corrode. According to the present invention, since the hydrogen ion index of the water stored in the water tank is appropriately maintained, corrosion of concrete is prevented.

A drainage amount, which is the amount of water discharged by the discharge unit, may be set in a plurality of stages, and the measured value may be associated with the drainage amount.

This will be described with reference to FIG. FIG. 4 is an example of a data table stored in the dust and odor removing system A according to one embodiment of the present invention. As shown in FIG. 4, the measured value of pH is associated with the amount of water discharged. This data table can be stored in the storage unit 43, for example. Alternatively, it may be stored in the storage unit 43 as a database.

For example, when the measured pH is 6.0 or more, it means that no abnormality has occurred, so a normal drainage amount is set. When the pH is 5.0 or more and less than 6.0, a larger amount of drainage than the amount of drainage set as pattern 1 is set. When the pH is 4.0 or more and less than 5.0, a larger amount of waste water than that set in pattern 2 is set. When the pH is less than 4.0, a larger amount of waste water than that set in pattern 3 is set. Since the data table shown in FIG. 4 is an example, the pH value and the number of patterns are not limited to this.

By setting the amount of waste water in a plurality of stages in this way, it is possible to prevent rapid changes in the water quality of the circulating water.

In this example, the pH and the amount of drainage are associated, but the EC and the amount of drainage may be associated. In addition, a combined index of pH and EC and water discharge may be associated.

The water quality measuring section 15 may be provided in at least one of the plurality of units. In this embodiment, each of the first water tank section 13 and the second water tank section 23 may be provided with the water quality measuring section 15, but for example, only the first water tank section 13 is provided with the water quality measuring section 15. It's okay to be

However, the installation location of the water quality measuring unit 15 is preferably, for example, the first water tank unit 13 located on the most upstream side of the airflow X, the water pipe 141, or the like. Moreover, the installation position of the discharge part 16 is preferably the first water tank part 13 located on the most upstream side of the airflow X, for example.

In general, the first filter 11 disposed on the upstream side of the airflow adsorbs and/or decomposes the most dust particles. Therefore, the water W13 stored in the first water tank portion 13 arranged on the upstream side of the airflow is most likely to be polluted. Therefore, by providing the water quality measurement unit 15 and the discharge unit 16 in the first water tank unit 13 or the like arranged on the most upstream side of the airflow X, the turbidity of the circulating water circulating in the dust removal and deodorization system A can be further improved. It can be efficiently monitored and/or adjusted.

The water W23 stored in the second water tank portion 23 may flow into the first water tank portion 13, for example, by using a pump or the like. Thereby, one water quality measuring unit 15 can measure the water quality of the water stored in each of the plurality of water tank units. As a result, costs are reduced.

The dust removal and deodorization system A may include a water supply section 25 . For example, when the water level of the water W13 stored in the first water tank section 13 drops below a certain level due to the discharge of the water W13 by the discharge section 16, the water supply section 25 supplies water to the water tank section.

In the present embodiment, the second water tank section 23 arranged on the downstream side of the airflow X is provided with the water supply section 25 . When new water Y1 is supplied from the water supply unit 25 to the second water tank unit 23, the water W23 stored in the second water tank unit 23 overflows, and the water Y2 moves to the first water tank unit 13. , the first water tank portion 13 is also supplied with water. Accordingly, since one water supply unit can supply water to both the first water tank unit 13 and the second water tank unit 23, the system configuration can be simplified.

In addition, this configuration has the following advantages. In general, the water W13 stored in the first water tank section 13 is more likely to be polluted than the water W23 stored in the second water tank section 23 . Therefore, as in the present embodiment, by discharging the water W13 stored in the first water tank portion 13 and supplying new water to the second water tank portion 23, the inside of the water tank portion can be more efficiently discharged. pollution can be reduced.

In the case of a configuration in which a shared water tank is used instead of the configuration in which the first water tank 13 and the second water tank 23 are divided, for example, the water quality measurement unit 15 and the discharge unit 16 are provided in the common water tank. may be provided.

In addition, the dust removing and deodorizing system A according to the present invention may be configured to include filter cleaning means for cleaning the filter (not shown). As a result, the activity of the biofilm formed on the filter surface can be maintained, and the ventilation resistance of the filter can be reduced. Therefore, it is possible to improve the durability of the filter, reduce the load on air conditioning equipment such as an exhaust fan in a livestock barn, and reduce maintenance costs such as electricity costs.

Further, the dust and odor removal system A according to the present invention may be configured to include control means for automatically controlling, for example, water supply, sprinkling, circulation, drainage, measurement of electrical conductivity, etc. (not shown). . This allows the system to operate automatically.

Applying the dust removal and deodorization system A has the following advantages. This advantage also applies to other embodiments described later.
(1) Since the deodorization is carried out using microbes such as nitrifying bacteria that exist widely in the natural world without using chemicals or the like, the environmental load is small and the safety is high.
(2) As described above, dust removal and/or deodorization can be performed without using chemicals, and the amount of sludge generated is small, so sewage treatment can be easily performed using a normal septic tank or the like. (3) In the case of a livestock barn, the deodorizing treatment can be performed using microorganisms present in the barn, so the dust removal and deodorization system A can be installed and/or introduced simply and inexpensively.
(4) As described above, since the dust removal and deodorization system A deodorizes by biological treatment, there is no need for complicated processes such as pressurization/decompression, heating/cooling, and the use of expensive catalysts. In addition, the consumption of water and electricity (energy) can be reduced. Therefore, running costs can be kept low.
(5) As described above, the dust removal and deodorization system A has a structure in which a biofilm is formed on the filter, and does not require a complicated device structure, so maintenance is relatively easy.
(6) Since the dust removal and deodorization system A also removes dust, it is possible to keep the environment in the facility favorable. Therefore, for example, when this dust removal and deodorization system A is applied to livestock barns, the risk of spread of infectious diseases to animals (cattle, pigs, chickens, etc.) inside and outside the farm can be reduced. can maintain good health.

<2. Second Embodiment According to the Present Invention (Example 2 of Dust Removal and Deodorization System)>
The water transfer amount, which is the amount of water sent by the water transfer unit 14, may be associated with the measured value. This will be described with reference to FIG. FIG. 5 is a flow chart showing an example of the procedure of the dust and odor removal system A according to one embodiment of the present invention.

As shown in FIG. 5, the water quality measurement unit 15 measures the pH of the water W13 stored in the first water tank unit 13 (step S21).

Next, the calculating part 41 determines whether the measured pH is below a threshold value (step S22). In particular, the calculation unit 41 determines whether or not it is strongly acidic.

Then, when the measured pH is equal to or less than the threshold (step S22: Yes), the control unit 42 reduces the amount of water transferred by the first water transfer unit 14, and transfers water to the first filter 11. Decrease the amount (step S23).

Further, the control unit 42 increases the amount of water transferred from the second water transfer unit 14 to increase the amount of water transferred to the second filter 21 (step S24).

It should be noted that an increase in the amount of water transferred can be a lengthening of the time during which water is sprayed onto the filter. A reduction in water transfer can be a reduction in the amount of time the filter is watered.

The pH of the water W23 stored in the second water tank portion 23 arranged downstream of the airflow X tends to decrease. However, according to the present invention, the air containing ammonia easily flows to the second filter 21 arranged on the downstream side of the airflow X. As a result, the increase in pH of the water W23 stored in the second water tank portion 23 is promoted.

<3. Third Embodiment According to the Present Invention (Example 3 of Dust Removal and Deodorization System)>
The dust and odor removal system A according to one embodiment of the present invention can further include a communication unit that transmits the measured values of the electrical conductivity and/or the hydrogen ion exponent to the outside of the facility via an information communication network. .

This will be described with reference to FIG. FIG. 6 is a block diagram showing the configuration of the dust removal and deodorization system A according to one embodiment of the present invention. As shown in FIG. 6 , the dust and odor removal system A according to one embodiment of the present invention can further include a communication section 44 .

The communication unit 44 has a function of communicating via an information communication network using communication technologies such as Wi-Fi, Bluetooth (registered trademark), and LTE (Long Term Evolution).

The information communication network includes, for example, a wired network such as LAN (Local Area Network) or WAN (Wide Area Network), a wireless LAN (WLAN: Wireless Local Area Network), or a wireless WAN (WWAN: Wireless Wide Area Network) via a base station. ) or the Internet using a communication protocol such as TCP/IP (Transmission Control Protocol/Internet Protocol).

For example, when the dust and deodorizing system A according to the present invention is installed in a livestock barn, there is a problem that a person cannot enter the livestock barn and perform regular maintenance of the dust and deodorizing system A in order to prevent epidemics of livestock. However, when the communication unit 44 transmits the measured values of the electrical conductivity and/or the hydrogen ion exponent to the outside of the facility via the information communication network, the measured values can be monitored remotely. This effect similarly occurs in other embodiments described later.

A computer installed at a remote location may automatically control the dust removal and deodorization system A based on the received measurement values.

<4. Fourth Embodiment According to the Present Invention (Example 4 of Dust Removal and Deodorization System)>
The dust and odor removal system A according to one embodiment of the present invention further includes a waste water amount measuring unit that measures a waste water amount, which is the amount of water discharged by the discharge unit. It can be transmitted outside the facility via an information communication network.

This will be described with reference to FIG. FIG. 7 is a block diagram showing the configuration of the dust and odor removal system A according to one embodiment of the present invention. As shown in FIG. 7 , the dust and odor removal system A according to one embodiment of the present invention can further include a waste water amount measurement unit 45 .

The communication unit 44 can transmit the amount of drainage measured by the amount of drainage measurement unit 45 to the outside of the facility via the information communication network. This makes it possible to detect, for example, a failure of the ejector 16 .

Information transmitted by the communication unit 44 is not limited to the above. For example, a failure of the water supply unit 25 can be detected by the communication unit 44 transmitting information about the water supply unit 25 .

<5. Fifth Embodiment According to the Present Invention (Example 5 of Dust Removal and Deodorization System)>
The dust and odor removal system A according to one embodiment of the present invention can further include a correction unit that corrects the measured value of the hydrogen ion exponent.

This will be described with reference to FIG. FIG. 8 is a block diagram showing the configuration of a dust removing and deodorizing system A according to one embodiment of the present invention. As shown in FIG. 8 , the dust and odor removal system A according to one embodiment of the present invention can further include a corrector 46 . A correction unit 46 corrects the measured value of the hydrogen ion exponent.

A procedure performed by the correction unit 46 will be described with reference to FIG. FIG. 9 is a flow chart showing an example of the procedure of the dust and odor removal system A according to one embodiment of the present invention.

As shown in FIG. 9, the water quality measurement unit 15 measures the hydrogen ion exponent (pH) of the water W13 stored in the first water tank unit 13 (step S31).

Next, the calculation unit 41 refers to information stored in the storage unit 43 (step S32). In particular, the calculator 41 refers to the hydrogen ion exponent of fresh water.

Then, the correction unit 46 corrects the measured hydrogen ion exponent based on the information obtained from the storage unit 43 (step S33).

Thereby, the dust removal and deodorization system A can correct the deviation of the measured hydrogen ion exponent.

The dust removal and deodorization system A can use, for example, information related to livestock raised in the facility, trends in measured values, and information such as ammonia residual concentration in the air in the facility.

<6. Sixth Embodiment According to the Present Invention (Example 6 of Dust Removal and Deodorization System)>
The dust removal and deodorization system A can control the amount of water discharged by the discharge unit 16 using the ammonia residual concentration in the air in the facility.

A method for measuring the ammonia residual concentration in the air in the facility will be described with reference to FIG. FIG. 10 is a schematic side view showing the configuration of the dust and odor removal system A according to one embodiment of the present invention.

As shown in FIG. 10, a first pipe 51, a second pipe 52, a third pipe 53, and a fourth pipe 54 are arranged. Each of the first pipe 51 , the second pipe 52 , the third pipe 53 , and the fourth pipe 54 is connected to an air tank 55 .

The air in the facility goes outside the facility through the first filter 11 and the second filter 21 in this order by the exhaust fan B5 for ventilating the inside of the facility.

The first pipe 51 is arranged inside the facility from the first filter 11 . The second pipe 52 is arranged between the first filter 11 and the second filter 21 . The third pipe 53 is arranged outside the facility from the exhaust fan B5. The fourth pipe 54 is arranged between the second filter 21 and the exhaust fan B5.

Air in the facility is sent to the air tank 55 via the first pipe 51 . Air between the first filter 11 and the second filter 21 is sent to the air tank 55 via the second pipe 52 . The air outside the facility is sent to the air tank 55 via the third pipe 53 by the exhaust fan B5. Air in the air tank 55 is drawn to the exhaust fan B5 via the fourth pipe 54 . The negative pressure of the exhaust fan B5 is used to realize air flow in each pipe without requiring a special blower or suction device.

A first electromagnetic valve 61 for controlling the flow of air inside the first pipe 51 is installed in the first pipe 51 . A second electromagnetic valve 62 is installed in the second pipe 52 to control the flow of air inside the second pipe 52 . A third electromagnetic valve 63 is installed in the third pipe 53 to control the flow of air inside the third pipe 53 .

A sensor 56 for measuring the concentration of ammonia in the air is installed in the air tank 55 . For example, when the first solenoid valve 61 is open and the second solenoid valve 62 and the third solenoid valve 63 are closed, the sensor 56 can measure the concentration of ammonia in the air in the facility. Alternatively, when the third solenoid valve 63 is open and the first solenoid valve 61 and the second solenoid valve 62 are closed, the sensor 56 can measure the concentration of ammonia in the air outside the facility.

When the ammonia residual concentration in the air obtained via the _first pipe 51 is C1 and the ammonia residual concentration in the air obtained via the _third pipe 53 is C3, the first The removal rate X of the ammonia component by the filter 11 and the second filter 21 is calculated, for example, by the following formula (1).

X=(C ₁ -C ₃ )÷C ₁ (1)

Note that the ammonia residual concentration C2 in the air obtained via the _second pipe 52 may be used to calculate the removal rate. The removal rate X of the ammonia component by the first filter 11 is calculated, for example, by the following formula (2).

X=(C ₁ -C ₂ )÷C ₁ (2)

The discharge unit 16 can increase or decrease the amount of water discharged by the discharge unit 16 based on the removal rate of the ammonia component by the filters (the first filter 11 or the second filter 21 or both). This will be described with reference to FIG. FIG. 11 is a flow chart showing an example of the procedure of the dust and odor removal system A according to one embodiment of the present invention.

As shown in FIG. 11, the sensor 56 measures the concentration of ammonia in the air (step S41).

Next, the calculation unit 41 calculates the removal rate of the ammonia component using the formula (1) or (2) above (step S42).

Next, when the removal rate is equal to or higher than the predetermined threshold (step S43: Yes), the discharge unit 16 increases or decreases the discharge amount of water W13 or water W23 or both (step S44). As a result, the activity of the biofilm formed on the filter surface can be enhanced.

<7. Seventh embodiment (livestock barn) according to the present invention>
FIG. 12 is a schematic diagram showing an example of installing the dust and odor removing system A according to one embodiment of the present invention in a livestock barn.

As shown in FIG. 12, the livestock barn B includes a breeding room B2 for housing an animal B1, an air inlet B3 and an inlet B4 for sending air into the breeding room B2, an exhaust fan B5 for ventilating the breeding room B2, and a dust removal and deodorization system A according to the present invention. The inside of the breeding room B2 becomes negative pressure by the exhaust fan B5, and an airflow X from the breeding room B2 to the outside B6 of the barn B is formed. The dust and odor removal system A according to the present embodiment includes the first filter 11 and the second filter 21 formed with biofilms, and the third filter located on the most downstream side of the airflow X and containing at least a photocatalyst substance. and a filter 31 .

Dust and odor components present in the breeding room B2 are sent to the dust removal and deodorization system A by the airflow X formed by the exhaust fan B5. Most of the dust is adsorbed on the biofilm of the first filter 11 and decomposed. Odor components are oxidized and/or decomposed by useful microorganisms existing in the first filter 11 and the second filter 21 . Odor components discharged to the outside B5 of the livestock barn B are greatly reduced by the above steps. In addition, the third filter 31 decomposes the remaining odor components by photocatalytic action, thereby increasing the deodorizing effect.

For example, an exhaust fan B5 is used to form an airflow from the inside of the breeding room B2 to the outside B6 of the livestock barn B, and the useful microorganisms present in the breeding room B2 are removed together with dust and odor components through the first filter 11 and the second filter. No. 2 filter 21 is brought into contact. Then, in the first filter 11 and the second filter 21, useful microorganisms involved in deodorization are preferentially propagated. As a result, biofilms of useful microorganisms and the like are naturally formed on the first filter 11 and the second filter 21 . As a result, useful microorganisms naturally colonize.

Note that the locations where each unit or each filter is installed in the dust removal and deodorization system A are not limited to those shown in FIG. That is, as long as the breeding room B2 is made negative pressure by driving the exhaust fan B5 and the airflow X is formed, the design can be appropriately changed according to the purpose, size, structure, etc. of the facility. be.

For example, each filter may be installed on the upstream side of the airflow X from the exhaust fan B5. In addition, for example, the first filter 11 and the second filter 21 are installed upstream or downstream of the airflow X from the exhaust fan B5, and the third filter 31 is installed at a location that receives a lot of sunlight. may In that case, for example, a predetermined valve (not shown) or the like may be installed downstream of the exhaust fan B5 or the second filter 21 to guide the airflow X to the third filter 31 .

The dust removal and deodorization system A according to the present invention is not narrowly limited to installation in livestock barns. That is, since useful microorganisms naturally exist in livestock barns (cattle barns, pig barns, poultry barns, etc.), composting facilities, sewage treatment facilities, garbage disposal sites, etc., the dust removal and deodorization system A can be applied as is.

The dust and odor removal system A according to the present invention can also be applied to food factories, chemical factories, and the like. In that case, as described above, for example, a solution containing useful microorganisms is added to the circulating water, or a powdered viable microorganism agent of useful microorganisms is sprayed on the first filter 11 and / or the second filter 21. By doing so, useful microorganisms can be introduced into each filter.

In addition, the present invention can also take the following configurations.
[1]
A dust removal and deodorization system used to form an airflow from inside the facility to outside the facility and discharge the air inside the facility to the outside of the facility,
a plurality of filters arranged in order from the upstream side of the airflow for removing dust and/or deodorizing;
and a plurality of units corresponding to the filters,
At least one of the filters has a biofilm formed by microorganisms useful for deodorization,
said unit
a water sprinkling unit for sprinkling water on the filter;
a water tank portion for storing water falling from the filter;
a water transfer section for sending water stored in the water tank section to the sprinkler section;
a discharge unit for discharging water stored in the water tank;
a water quality measuring unit for measuring electrical conductivity and/or hydrogen ion index of water stored in the water tank unit;
The dust and odor removal system, wherein the discharge unit discharges the water when the measured value of the electrical conductivity and/or the hydrogen ion exponent is out of a predetermined range.
[2]
A drainage amount, which is the amount of water discharged by the discharge unit, is set in a plurality of stages,
The measured value and the drainage volume are associated,
The dust and odor removal system according to [1].
[3]
A water transfer amount, which is the amount of water sent by the water transfer unit, and the measured value are associated,
The dust and odor removal system according to [1] or [2].
[4]
Further comprising a communication unit that transmits the measured value of the electrical conductivity and/or the hydrogen ion exponent to the outside of the facility via an information communication network,
The dust and odor removal system according to any one of [1] to [3].
[5]
Further comprising a drainage amount measuring unit for measuring a drainage amount, which is the amount of water discharged by the discharge unit,
The communication unit transmits the measured value of the amount of wastewater to the outside of the facility via an information communication network;
The dust and odor removal system according to [4].
[6]
Further comprising a correction unit that corrects the measured value of the hydrogen ion exponent,
The dust and odor removal system according to any one of [1] to [5].
[7]
The water quality measuring unit is provided in at least one of the plurality of units,
The dust and odor removal system according to any one of [1] to [6].
[8]
The discharge unit increases or decreases the amount of water discharged by the discharge unit based on the removal rate of the ammonia component by the filter,
The dust and odor removal system according to any one of [1] to [7].
[9]
A livestock barn comprising the dust and odor removal system according to any one of [1] to [8].
[10]
A dust and odor removing method using the dust and odor removing system according to any one of [1] to [8].

1 First unit 11 First filter 12 First watering unit 13 First water tank unit 14 First water transferring unit 15 Water quality measuring unit 2 Second unit 21 Second filter 22 Second watering unit 23 Second water tank unit 24 Second water transfer unit 41 Calculation unit 42 Control unit 43 Storage unit 44 Communication unit 45 Drainage measurement unit 46 Correction unit 51 First pipe 52 Second pipe 53 Third pipe 54 Fourth pipe Piping 55 Air tank 56 Sensor A Dust removal and deodorization system B Livestock barn B5 Exhaust fan X Airflow

Claims (10)

A dust removal and deodorization system used to form an airflow from inside the facility to outside the facility and discharge the air inside the facility to the outside of the facility,
a plurality of filters arranged in order from the upstream side of the airflow for removing dust and/or deodorizing;
and a plurality of units corresponding to the filters,
At least one of the filters has a biofilm formed by microorganisms useful for deodorization,
said unit
a water sprinkling unit for sprinkling water on the filter;
a water tank portion for storing water falling from the filter;
a water transfer section for sending water stored in the water tank section to the sprinkler section;
a discharge unit for discharging water stored in the water tank;
a water quality measuring unit for measuring electrical conductivity and/or hydrogen ion index of water stored in the water tank unit;
The dust and odor removal system, wherein the discharge unit discharges the water when the measured value of the electrical conductivity and/or the hydrogen ion exponent is out of a predetermined range. A drainage amount, which is the amount of water discharged by the discharge unit, is set in a plurality of stages,
The measured value and the drainage volume are associated,
The dust and odor removal system according to claim 1. A water transfer amount, which is the amount of water sent by the water transfer unit, and the measured value are associated,
The dust and odor removing system according to claim 1 or 2. Further comprising a communication unit that transmits the measured value of the electrical conductivity and/or the hydrogen ion exponent to the outside of the facility via an information communication network,
The dust and odor removal system according to any one of claims 1 to 3. Further comprising a drainage amount measuring unit for measuring a drainage amount, which is the amount of water discharged by the discharge unit,
The communication unit transmits the measured value of the amount of wastewater to the outside of the facility via an information communication network;
The dust and odor removal system according to claim 4. Further comprising a correction unit that corrects the measured value of the hydrogen ion exponent,
The dust and odor removal system according to any one of claims 1 to 5. The water quality measuring unit is provided in at least one of the plurality of units,
The dust and odor removal system according to any one of claims 1 to 6. The discharge unit increases or decreases the amount of water discharged by the discharge unit based on the removal rate of the ammonia component by the filter,
The dust and odor removal system according to any one of claims 1 to 7. A livestock barn comprising the dust and odor removal system according to any one of claims 1 to 8. A dust and odor removing method using the dust and odor removing system according to any one of claims 1 to 8.

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