JP5106982B2 - Odor treatment method, malodor treatment system and breeding system - Google Patents

Description

  The present invention relates to a malodor treatment method, a malodor treatment system, and a breeding system.

  As a method of treating bad smells such as ammonia odor in manure processing plants, organic solvents in semiconductor factories, fermentation odors in food and beer factories, hydrogen sulfide, chemical treatment with sodium hypochlorite, activated carbon adsorption, microorganisms There are methods such as disassembly. There is no method that can sufficiently remove malodorous substances at a low running cost, such as an experimental animal house for pharmaceutical research, and it is not uncommon to have trouble with the treatment.

Patent Document 1 describes that ammonia in waste liquid can be oxidized to nitrate nitrogen by microorganisms activated by nanobubbles and can be non-brominated, but it is not a technique that can directly treat malodors.
JP 2006-305555 A

  In view of the above problems, an object of the present invention is to provide a malodor treatment method, a malodor treatment system, and a breeding system that can economically treat malodor.

In order to solve the above problems, a malodor treatment method according to the present invention is a malodor treatment method in which a malodor generation source is washed with washing water containing nitrate ions and nanobubbles, and the nitrate ions are nitrogen gas in the washing water. In this method, finely divided nanobubbles are introduced and generated by the oxidizing power of the nanobubbles .

  According to this method, odorous substances can be oxidized and non-brominated by free radicals generated by nanobubbles. In addition, the bad odor source can be dissolved and easily washed away with nitric acid, and generation of new odorous substances can be prevented.

In particular , in the malodor treatment method of the present invention, the nitrate ions are generated by introducing nanobubbles obtained by refining nitrogen gas into the washing water and oxidizing power of the nanobubbles .

For this reason, nitrate ions and nanobubbles can be generated at the same time, and handling is easy because there is no need to use a drug.

  Further, in the malodor treatment method of the present invention, the nanobubbles are stored in the wash water, introduced into a wash water tank that holds activated carbon in the wash water, and further washed water after washing the malodor source. It may be collected and recirculated to the washing water tank.

  According to this method, since the activated carbon in the cleaning tank adsorbs organic substances in the cleaning water, the cleaning water can be reused.

  In the malodor treatment method of the present invention, microorganisms may be propagated on the activated carbon.

  According to this method, since the microorganisms decompose organic substances adsorbed on the activated carbon to regenerate the activated carbon, it is not necessary to replace the activated carbon.

  Further, in the malodor treatment method of the present invention, a water film formed of membrane water is disposed in a space communicating with the space where the malodor generation source is located, and the membrane water absorbs malodorous substances in the air, and the water film The air sucked from the space in which the scrubber is placed may be introduced into a scrubber that sprinkles scrubber water, and the scrubber water may absorb malodorous substances.

  According to this method, the malodorous substance released into the air before washing off the malodorous source is absorbed and removed by the membrane water and the scrubber water, so that the malodor is not leaked to the outside.

  In the malodor treatment method of the present invention, the air that has passed through the scrubber may be circulated to the space where the malodor generation source is located.

  According to this method, even if the malodorous substance cannot be completely removed by the scrubber by circulating air, the malodorous substance is not released to the outside.

  In the malodor treatment method of the present invention, the membrane water and the scrubber water may contain nanobubbles.

  According to this method, the malodorous substance is easily absorbed in the washing water due to the negative charge of the nanobubbles. Moreover, since the free radical produced | generated by nanobubble has an oxidizing power, a malodorous substance can be oxidized and it can be made non-brominated. It is also possible to prevent slime and algae from being generated in the water film and scrubber due to the oxidizing power of free radicals.

  In the malodor treatment method of the present invention, the water film may be formed of a water film forming material that assists in forming a film with the film water, preferably a three-dimensional network shaped porous material.

  According to this method, the area of the water film in contact with air can be increased, and the malodorous substance can be efficiently removed.

  In the malodor treatment method of the present invention, the scrubber may be filled with a plastic filler.

  According to this method, the contact between the scrubber water and the air can be increased, and the malodorous substance can be reliably removed.

  In the malodor treatment method of the present invention, the membrane water and the scrubber water are supplied from a treatment water tank holding activated carbon, and the membrane water and the scrubber water collected by the water film and the scrubber are supplied to the treatment water tank. It may be refluxed.

  According to this method, membrane water and scrubber water can be recycled.

  In the malodor treatment method of the present invention, nano bubbles may be introduced into the treated water tank.

  According to this method, the malodorous substance absorbed in the membrane water and the scrubber water can be oxidized and non-brominated by the oxidizing power of free radicals generated by the nanobubbles.

  Further, the malodor treatment system according to the present invention comprises a washing water tank for storing washing water containing nitrate ions, a nanobubble generator for introducing nanobubbles into the washing water in the washing water tank, and a washing water in the washing water tank. Watering means for spraying the generation source and recovery means for recovering the washing water sprayed to the malodor generation source and circulating it to the washing water tank are provided.

  According to this structure, an odorous substance can be oxidized and non-brominated by free radicals generated by nanobubbles. In addition, the bad odor source can be dissolved and easily washed away with nitric acid, and generation of new odorous substances can be prevented.

The rearing system according to the present invention includes a rearing cage having a net-like bottom plate through which manure of an animal reared inside passes, a rearing room that can be arranged with a space on the floor, and a nitrate ion in the rearing room. And a sprinkling means for sprinkling cleaning water containing nanobubbles, and a cleaning water tank for storing the cleaning water and circulating the cleaning water sprinkled in the breeding room, wherein the cleaning water tank has nanobubbles in the stored cleaning water. It is assumed to have a nanobubble generator for introducing

  According to this configuration, ammonia and organic matter in manure can be oxidized and non-brominated by free radicals generated by nanobubbles. Moreover, feces and urine can be dissolved and washed away with nitric acid, and the generation of malodor can be prevented.

In particular, the aquarium system of the present invention storing the treated water, comprising a nano bubble generator device for introducing nanobubbles into the washing water reserving washing water to have a ring flowed wash water tank watering the breeding room.

For this reason, wash water can be recycled.

  According to the present invention, since the malodor generating source is washed with washing water containing nitrate ions and nano bubbles, the free radicals generated by the nano bubbles can oxidize and deodorize odorous substances. Can be dissolved and washed away cleanly.

Embodiments of the present invention will now be described with reference to the drawings.
In FIG. 1, the structure of the breeding system 1 to which 1st Embodiment of the malodor treatment system by this invention is applied is shown. The breeding system 1 has a breeding room (working room) 2 for breeding experimental animals, a water film deodorizing room 3 communicating with the breeding room 2, a scrubber 4, and a washing water tank 5 for storing washing water.

  The breeding room 2 is a room in which the floor 6 is made of a concrete pit that can be easily cleaned, and a shelf board 7 made of a net, punching metal, or the like is disposed with a space between the floor 6. A plurality of breeding cages 8 for breeding laboratory animals such as mice, rats, rabbits, monkeys, and cats can be arranged on the shelf board 7. The breeding cage 8 has a net-like bottom plate 9 so that manure of the animals to be bred passes through the bottom plate 9 and the shelf plate 7 and falls onto the floor 6. Thus, animal manure in the rearing cage 8 placed on the upper shelf 7 is prevented from entering the lower rearing cage 8.

  The breeding system 1 draws the washing water stored in the washing tank 5 with the washing pump 10, and on the inner wall surface and floor surface of the breeding room 2 and the shelf board 7 and the breeding cage 8 through the watering valve 11. A watering line (watering means) 12 for watering is provided. Watering of the watering line 12 is periodically performed by a timer, for example. If only the necessary watering valve 11 is opened according to the position of the breeding cage 8 and the like, the cleaning water can be sprayed only in the necessary place with the operation of the cleaning pump 10. The washing water is sprayed in the form of a shower and can wash away not only animal droppings falling on the floor but also animal droppings adhering to the top of the shelf board 7 and the breeding cage 8. An eye plate 13 is installed at the drain port of the floor 6 to remove dust in the wash water. The washing water in which manure is dissolved is collected in the washing water tank 5 through the water distribution pipe 14 (collecting means).

  The cleaning water tank 5 includes a nanobubble generator 15 that introduces nanobubbles into the stored cleaning water. The nanobubble generator 15 pumps the cleaning water from the cleaning water tank 5, shears the self-sucked gas and mixes it with the cleaning water, and the gas-liquid mixing circulation pump 17 provided with the first shearing section 16 and swirling the cleaning water at a high speed. The second shearing section 18 and the third shearing section 19 that further refine the contained gas, a nitrogen gas cylinder (nitrogen supply source) 20 that supplies nitrogen gas to the gas-liquid mixing circulation pump 17, and the flow rate of the nitrogen gas are adjusted. Needle valve 21.

The gas-liquid mixing circulation pump 17 is a high-lift pump having a lift of 40 m (discharge pressure 4 kg / cm ² ) or more. The gas-liquid mixing / circulation pump 17 is preferably driven by a two-pole motor having a stable torque, and is preferably controlled by an inverter in order to stabilize the discharge pressure at a predetermined pressure.

  The gas-liquid mixing circulation pump 17 swirls the washing water at a high speed by the high-speed rotating impeller of the first shearing section 16 and narrows the swirling flow into a tornado shape, thereby generating a shearing flow rotating at a higher speed. The first shearing unit 16 self-sucks nitrogen gas from the nitrogen gas cylinder 20 by the negative pressure generated by swirling the cleaning water at high speed. The sucked nitrogen gas is dispersed in the washing water while being cut and pulverized by a shear flow rotating at a high speed of about 500 to 600 rotations / second. In the first shearing portion 16, the nitrogen gas is divided into bubbles (microbubbles) on the order of micrometers. The internal shape of the first shearing portion 16 is an ellipse, and a perfect circle for obtaining the maximum effect. In addition, the inner surface of the first shearing part is mirror-finished to reduce internal friction.

  The second shearing portion 18 and the third shearing portion 19 are made of, for example, stainless steel, have an elliptical shape, preferably a true circular inner shape, and the optimal discharge port diameter is 4 mm to 9 mm. The second shearing part 18 and the third shearing part 19 form a shearing flow that swirls at a higher speed by making the flow of the washing water a finer tornado, and further introduce the microbubbles introduced by the first shearing part 16 Finely divide into nanometer-order nanobubbles. By performing this process in two stages of the second shearing portion 18 and the third shearing portion 19, the bubble size can be made more uniform.

  In this nanobubble generation process, when a micro-sized bubble (microbubble) is sheared to a nano-size, an extremely high temperature extreme reaction field is locally formed, and the nanobubble is negatively charged. In addition, the washing water is decomposed in this extreme reaction field, and unstable free radicals are generated.

  In order to prevent cavitation, the gas-liquid mixing / circulation pump 17 is started with the needle valve 21 closed using a sequencer or the like, and after about 60 seconds, the rotation is stabilized and the needle valve 21 is opened to start nitrogen. It is necessary to start supplying gas. Further, when the supply amount of nitrogen gas is large, the gas is not sufficiently divided and cannot be miniaturized to the nanometer order. In the present embodiment, when the supply amount of nitrogen gas is adjusted to 0.6 liter / min by the needle valve 21, the diameter of the nanobubble is about 120 nm, but when the supply amount of nitrogen gas is 0.75 liter / min. When the nanobubble diameter is about 300 to 600 nm and the nitrogen gas supply rate is 1.2 liters / minute, the nanobubble diameter is about 600 to 900 nm and the nitrogen gas supply rate is 1.5 liters / minute, The diameter is about 900-1500 nm. Therefore, in this embodiment, in order to obtain nanobubbles, the supply amount of nitrogen gas needs to be 1.2 liters / minute or less.

Nitrogen bubbles of nitrogen gas oxidize nitrogen (N ₂ ) gas due to the oxidizing power of free radicals to generate nitrate ions (NO ₃ ⁻ ). Therefore, the cleaning water in the cleaning water tank 5 contains nitrate ions and nanobubbles.

The washing water sprayed in the breeding room 2 can dissolve and remove the animal urine by the action of nitrate ions. In addition, ammonia (NH ₃ ) contained in animal manure dissolves in the wash water, and due to the strong oxidizing power of free radicals generated by nanobubbles, nitric oxide (NO) to nitric oxide (NO ₂ ), and Oxidized to nitric acid (NO ₃ ). In addition, organic matter in manure is also oxidatively decomposed by the oxidizing power of free radicals generated by nanobubbles. In order for the washing water to generate free radicals that can sufficiently oxidize the ammonia in manure, it is desirable to contain 500,000 or more nanobubbles per cc of washing water.

  In this way, in the rearing system 1, the feces and urine that are the source of malodor in the rearing room 2 are washed away without leaving the acidic wash water, and the malodorous substance ammonia in the feces and urine is oxidized to odorless nitric acid.

  The washing water tank 5 has a storage basket 22 whose side is sealed, whose upper part is opened and whose lower part is sealed with a plate with a hole, and in which the activated carbon 23 is held in the storage basket 22 and stored. Soak in the wash water.

  When washing water in which manure is dissolved in the breeding room 2 is introduced into the washing water tank 5 through the water distribution pipe 14, the activated carbon 23 adsorbs organic substances dissolved in the washing water. Since microorganisms propagate on the activated carbon 23, the microorganisms decompose organic substances adsorbed on the activated carbon to regenerate the activated carbon 23. However, when the number of animals reared in the breeding room 2 increases, the regeneration of the activated carbon 23 cannot catch up, so the activated carbon 23 needs to be replaced as appropriate.

  Further, in the present embodiment, the water film 24 is disposed in the water film deodorizing chamber 3 in order to remove ammonia diffused from the manure into the air before washing with the washing water. The water film is formed by supplying film water from a nozzle 26 to a water film forming material 25 (for example, “Hetimaron” manufactured by Nihon University Industrial Co., Ltd.) 25 made of a three-dimensional network-shaped porous material. The film water overflowing from the water film forming material 25 is collected by the tray 27. Note that both ends of the tray 27 are sealed with removable flanges 28 so that they can be easily cleaned when foreign matter is mixed in.

  In the present embodiment, the membrane water is the same as the scrubber water sprinkled by the scrubber 4, and is stored in the treated water tank 29 provided at the lower part of the scrubber 4, and the treatment in which the nano bubbles are introduced by the micro / nano bubble generator 30. It is water.

  The configuration of the nanobubble generator 30 is substantially the same as that of the nanobubble generator 15, and the same components are denoted by the same reference numerals and description thereof is omitted. The nanobubble generator 30 does not have the nitrogen gas cylinder 20 but is different from the nanobubble generator 15 only in that the outside air is self-supplied and air nanobubbles are introduced into the treated water.

  The air sucked by the fan 31 is introduced into the scrubber 4 from the water film deodorizing chamber 3. The scrubber 4 pumps up the treated water stored in the treated water tank 29 by the pump 32 in the same manner as the membrane water, and sprays it from the water spray nozzle 33 to the air introduced as the scrubber water. The scrubber 4 is filled with a plastic filler (for example, “Terraret” manufactured by Tsukishima Environmental Engineering Co., Ltd.) 34 to promote contact between air and scrubber water.

  The breeding room 2 is regularly cleaned by the watering line 12, but the fan 31 and the pump 32 are always operated, and the water film 24 and the scrubber 4 continuously absorb ammonia and volatile organic substances in the air. . The air that has passed through the scrubber 4 is circulated to the breeding room 2 through the circulation duct 35 and flows from the breeding room 2 to the water film deodorizing room 3 and further to the breeding room 2 through the scrubber 4. Form. In the water film deodorizing chamber 3, the air flows along the water film 24, thereby increasing the chances of contact between the water film and the air. Furthermore, since it is a closed system that circulates air and does not discharge it to the outside, odor does not leak to the outside, and air conditioning efficiency such as temperature control of the breeding room 2 is good.

  The membrane water forming the water membrane 24 and the scrubber water sprayed by the scrubber 4 contain nanobubbles having a negative charge, and can be efficiently removed by sucking ammonia in the air by its electrostatic force. In addition, since the membrane water and scrubber water contain free radicals with strong oxidizing power generated by nanobubbles, the absorbed ammonia and organic substances are decomposed, and slime and algae are generated in the water film forming material 25 and the filler 34. Can be prevented.

  Further, the treated water tank 29 holds the activated carbon 23 in the accommodation basket 22 in the same manner as the washing water tank 5. Microorganisms propagate on the activated carbon 23 and decompose organic substances absorbed by the treated water in the water film 24 and the scrubber 4. Since the organic matter load in the treated water tank 29 is relatively small, it is not usually necessary to replace the activated carbon 23.

  In the above breeding system 1, animal urine, which is a source of malodor, is treated by washing with wash water containing nitrate ions and nanobubbles, and malodorous substances diffused in the air are removed by the water film 24 and the scrubber 4. Highly capable of processing malodorous substances. In the breeding system 1, air is not circulated from the scrubber 4 to the breeding room 2 and released to the outside, so that no odor is leaked to the outside.

  In FIG. 2, the malodor treatment system 1 of 2nd Embodiment of this invention is shown. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted. The malodor treatment system 1 of this embodiment treats the odor of the working chamber 2a using an organic solvent, for example. In this embodiment, it has the watering line 12 which can wash | clean the floor 6 of the working chamber 2a in which the work bench 36 etc. are arrange | positioned. The cleaning line 12 can be sprinkled by the operator at any time such as at the end of the work.

  Moreover, in this embodiment, it has the blower 37 for introduce | transducing air into the washing water tank 5, and stirring it. The air introduced by the blower 37 is dispersed by the air diffuser tube 38 to effectively agitate the washing water.

  Also in this embodiment, the organic solvent overflowing the floor 6 is washed away with washing water containing nitric acid to remove the source of odor, and the odorous substance is oxidized by the oxidizing power of free radicals generated by nanobubbles. Can be Further, the water film 24 and the scrubber 4 can remove the odor diffused in the air of the working chamber 2a. And in this embodiment, by aeration with the blower 37, the microorganisms in the washing water tank 5 are activated, and decomposition | disassembly of the organic solvent dissolved in washing water is accelerated | stimulated.

  The working chamber 2a of the present embodiment may be a room where an organic solvent is used, a room where a fermenter of a food factory or a beer factory is installed, a dehydrator room of a human waste treatment plant or a sewage treatment plant. Moreover, in the malodor treatment system 1 of this embodiment, in addition to ammonia and organic solvents, malodor such as hydrogen sulfide can be treated.

  In FIG. 3, the malodor treatment system 1 of 3rd Embodiment of this invention is shown. In the present embodiment, a pH sensor 39 that detects the pH of the cleaning water in the cleaning water tank 5, and a pH controller 40 that adjusts the opening of the needle valve 21 of the nanobubble generator 15 based on the detection value of the pH sensor 39. Prepare.

  The pH controller 40 increases the opening of the needle valve 21 when the detected value of the pH sensor 39 is higher than a predetermined set value, and the needle valve 21 when the detected value of the pH sensor 39 is lower than the predetermined set value. The opening degree of 21 is made small. By changing the amount of nitrogen gas nanobubbles introduced into the washing water by the pH controller 40, the amount of nitrate ions generated by the oxidation of the nitrogen gas can be controlled, and the acidity of the washing water can be maintained within an appropriate range. .

  In FIG. 4, the malodor treatment system 1 of 4th Embodiment of this invention is shown. In the present embodiment, a TOC sensor 41 that detects the TOC (total organic carbon) of the treated water tank 29 and a TOC controller that adjusts the opening of the needle valve 21 of the nanobubble generator 30 based on the measured value of the TOC sensor 41. 42.

  The TOC controller 42 increases the opening of the needle valve 21 when the detected value of the TOC sensor 41 is higher than a predetermined set value, and the needle valve 21 when the detected value of the TOC sensor 41 is lower than the predetermined set value. The opening degree of 21 is made small. Thereby, the amount of nanobubbles of air containing oxygen introduced into the treated water is changed, the activity of the microorganisms of the activated carbon 23 is controlled, and the TOC of the treated water is maintained below a certain value. Thereby, it can control so that treated water does not emit an odor.

  In FIG. 5, the malodor treatment system 1 of 5th Embodiment of this invention is shown. In the present embodiment, the nanobubble generator 15 does not have the nitrogen gas cylinder 20 as shown in FIG. Since the nanobubble generator 15 introduces air nanobubbles into the wash water, it cannot directly generate nitrate ions, but even the air nanobubbles are capable of generating free radicals and oxidizing ammonia and organic matter. It has the same oxidizing power. Ammonia can be oxidized by free radicals generated along with nanobubbles to produce nitrate ions, but sufficient detergency cannot be achieved with nitrate ions that have been oxidized. For this reason, before watering with the sprinkling line 12, it is necessary to introduce | transduce nitric acid into the washing water tank 5, and to adjust washing water to appropriate acidity according to the state of a malodor generating source. Since this embodiment does not use nitrogen gas, the running cost is low, and it is effective when the source of malodor can be washed with washing water with low acidity.

(Experimental example)
An experimental device of the malodor treatment system 1 of FIG. 2 was produced and an experiment was performed to confirm its performance. In the experimental apparatus, the volume of the working chamber 2a is 4m ³ , the volume of the water film deodorizing chamber 3 is 0.7m ³ , the volume of the scrubber is 1m ³ , the capacity of the washing water tank 5 is 0.8m ³ , and the capacity of the treated water tank 29 is a 1 m ^3, the cleaning water tank 5 and the processing water tank 29, filled with coconut shell activated carbon 23 to 60% of the volume of each volume. The flow rate of the cleaning pump 10 was set to 40 liters / minute, the supply amount of the membrane water forming the water film 24 was set to 30 liters / minute, and the spraying amount of the scrubber water was set to 60 liters / minute. Moreover, the nano bubble generators 15 and 30 used HYK-32 type | mold by Kyowa Kikai Co., Ltd. which used the gas-liquid mixing circulation pump 17 of 2.2 kW.

  In this experiment, a container containing ammonia water was opened in the work room as a bad odor source. At this time, the ammonia concentration in the air at a position 0.5 m from the ammonia container was 82.6 ppm. Then, the malodor treatment system 1 was operated, and all the ammonia in the container was washed away with the washing water, and the ammonia in the air was absorbed and removed by the water film 24 and the scrubber 4. When the ammonia concentration was measured at the outlet of the scrubber 4 after the operation for 2 hours, the concentration was 0.4 ppm. This experimental result was well below the upper limit of 1 ppm on the site boundary line in the Odor Control Law and was sufficiently satisfactory.

The schematic block diagram of the breeding system of 1st Embodiment of this invention. The schematic block diagram of the malodor treatment system of 2nd Embodiment of this invention. The schematic block diagram of the malodor treatment system of 3rd Embodiment of this invention. The schematic block diagram of the malodor treatment system of 4th Embodiment of this invention. The schematic block diagram of the malodor treatment system of 5th Embodiment of this invention.

Explanation of symbols

1 Odor treatment system (breeding system)
2 Breeding room 2a Work room 3 Water film deodorizing room 4 Scrubber 5 Washing water tank 8 Breeding cage 15 Nanobubble generator 20 Nitrogen gas cylinder (nitrogen supply source)
23 activated carbon 24 water film 25 water film forming material 29 treated water tank 30 nanobubble generator 34 filler 35 recirculation duct

Claims (26)

A malodor treatment method in which a malodor source is washed with washing water containing nitrate ions and nanobubbles ,
The method for treating malodors , characterized in that the nitrate ions are generated by introducing nanobubbles obtained by refining nitrogen gas into the wash water and generated by the oxidizing power of the nanobubbles . The nanobubbles are stored in the washing water and introduced in a washing water tank holding activated carbon in the washing water,
Furthermore, to recover the cleaning water after cleaning the malodor source, malodor treatment method according to claim 1, characterized in that the reflux to the cleaning water tank. The malodor treatment method according to claim 2 , wherein microorganisms are propagated on the activated carbon. In a space communicating with the space where the malodor generation source is located, a water film formed of membrane water is disposed, and the malodorous substance in the air is absorbed by the membrane water,
The malodor according to any one of claims 1 to 3 , wherein air sucked from a space in which the water film is disposed is introduced into a scrubber that sprinkles scrubber water, and the scrubber water absorbs malodorous substances. Processing method. The malodor treatment method according to claim 4 , wherein the air that has passed through the scrubber is circulated in a space where the malodor generation source is located. The malodor treatment method according to claim 4 or 5 , wherein the membrane water and the scrubber water contain nanobubbles. The malodor treatment method according to any one of claims 4 to 6 , wherein the water film is formed of a water film forming material that assists in forming a film with the film water. The malodor treatment method according to claim 7 , wherein the water film forming material is a three-dimensional reticulated molded porous material. The malodor treatment method according to any one of claims 4 to 8 , wherein the scrubber is filled with a plastic filler. The film water and the scrubber water supplies from treating tank for holding the activated carbon according to claim 4, characterized in that to circulate the film water and the scrubber water recovered in the water layer and the scrubber to the treatment water tank The malodor treatment method according to any one of 1 to 9 . The malodor treatment method according to claim 10 , wherein nano bubbles are introduced into the treatment water tank. A washing water tank for storing washing water containing nitrate ions;
A nanobubble generator for introducing nanobubbles into the wash water in the wash water tank;
Sprinkling means for sprinkling the washing water of the washing water tank to a malodor generation source;
A malodor treatment system, comprising: a collecting means for collecting the washing water sprayed on the malodor generating source and circulating the washing water to the washing water tank. The malodor treatment system according to claim 12 , further comprising a nitrogen supply source that supplies nitrogen gas to the nanobubble generator. The malodor treatment system according to claim 12 or 13 , wherein the washing water tank holds activated carbon in the washing water to be stored. The malodor treatment system according to claim 14 , wherein microorganisms are propagated on the activated carbon. A working room for isolating the malodorous source from the outside;
A water film deodorizing chamber in communication with the working chamber and provided with a water film forming means for forming a water film with membrane water;
The malodor treatment system according to any one of claims 12 to 15 , further comprising a scrubber that introduces air sucked from the water film deodorization chamber and sprays scrubber water into the introduced air. The malodor treatment system according to claim 16 , further comprising a reflux duct for circulating the air that has passed through the scrubber to the work chamber. Retaining treated water, comprising a nanobubble generator for introducing nanobubbles into the treated water to be stored, and having a treated water tank into which the membrane water and the scrubber water are recovered and introduced,
The malodor treatment system according to claim 16 or 17 , wherein the membrane water and the scrubber water are the treated water pumped up from the treated water tank. The malodor treatment system according to claim 18 , wherein the treated water tank holds activated carbon in the treated water. The malodor treatment system according to any one of claims 16 to 19 , wherein the water film forming means includes a water film forming material that assists in forming a film with the film water. The malodor treatment system according to claim 20 , wherein the water film forming material is a three-dimensional net-like molded porous material. The malodor treatment system according to any one of claims 16 to 21 , wherein the scrubber is filled with a plastic filler. A breeding room that can be arranged with a space on the floor, a breeding cage having a net-like bottom plate through which manure of animals raised inside passes,
Sprinkling means for sprinkling washing water containing nitrate ions and nanobubbles in the breeding room ,
The washing water is stored, and a washing water tank in which washing water sprinkled in the breeding room is circulated is provided.
The breeding system, wherein the washing water tank has a nanobubble generator for introducing nanobubbles into the washing water to be stored . The breeding system according to claim 23 , further comprising a nitrogen supply source for supplying nitrogen gas to the nanobubble generator. A water film treatment chamber in communication with the breeding room, in which water film forming means for forming a water film of treated water is disposed;
25. The breeding system according to claim 24 , further comprising a scrubber that introduces air sucked from the water film treatment chamber and sprays the treated water into the introduced air. 26. The breeding system according to claim 25 , further comprising a reflux duct for guiding the air that has passed through the scrubber to the breeding room.

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