JP2009232824A - Apparatus for decompressing atmospheric pressure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for promoting denitrification reducing filtration of a nitrate which is the nontoxic final metabolite resulting from biological filtration carried out with oxidizing bacteria in order to maintain water quality in an ornamental aquarium but adversely affects aquatic organisms when accumulated in a large amount in the aquarium, converting the nitrate into nitrogen gas by utilizing characteristics of photosynthesis bacteria, and performing a release treatment. <P>SOLUTION: The apparatus (1) for decompressing atmospheric pressure is composed and characterized by providing the energy-saving and low-cost type denitrification nitrate respiratory reducing filtration aquarium utilizing the photosynthesis bacteria as a method for supplying the photosynthesis bacteria together with oxygen converted into a state close to free oxygen because supply of the oxygen and the photosynthesis bacteria from the natural world is necessary and important as conditions for utilizing the characteristics of the photosynthesis bacteria among various facultative anaerobic bacteria existing in the natural world, establishing the bacteria in a filter (13) and in the aquarium (19), and adapted to environments of promoting breeding, growth, and activities. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  As a metabolite at the end of oxidative filtration, the present invention generally performs physical filtration of waste products such as aquatic aquatic plants and fish, and biological filtration oxidative filtration by bacteria from nature to maintain the water quality in the aquarium. This nitrate becomes a low-toxic nitrate, and this nitrate also accumulates in large quantities. When it reaches 30 PPM, it adversely affects aquatic organisms that cause growth inhibition and immune system inhibition. The present invention relates to a method and an apparatus for reducing the amount of accumulation. "Non-patent document 2"

  Conventionally, in the maintenance of water quality in an aquarium, physical filtration of waste products such as food residue and fish excreta, and biological filtration of biooxidative degradation chains are performed.

What is generally referred to as aquarium filtration is oxidation filtration by oxidizing bacteria. "Non-patent document 5""Non-patent document 4"
Waste products, excretion of manure,
Production of ammonia by spoilage aerobic bacteria,
From aerobic bacteria to ammonia to nitrite,
From a nitrite to a nitrate by aerobic bacteria,

  These beneficial bacteria are mainly organic vegetative bacteria, bacteria that break down organic matter such as food and fish excretion from the air into the aquarium. The growth speed is fast in minutes, and ammonia that uses ammonia to produce ammonia is fish. It is harmful to

  Ammonia-oxidizing bacteria that use ammonia as a nutrient, bacteria that decompose ammonia, and nitrite that uses oxygen to produce nitrite, slow growth and takes 2-3 days, is also toxic.

  Nitrite-containing nutrients, nitrite-hydrophobic bacteria, nitrite-degrading bacteria, which also take a few days to grow, but they produce harmless nitrates. As a final metabolite, nitrate is harmless, but low-toxic nitrate also accumulates in large quantities, and when it reaches 30 PPM, it has a harmful effect on aquatic organisms that inhibit growth and immune system. Discharge outside the aquarium by changing water by about one third of the aquarium every week.

  The representatives of the aerobic bacteria are genus Nitrosomonas and Genus Nitrobacter. These bacteria take up oxygen and nutrients in the aquarium, acquire energy, maintain life, and produce cellular substances for growth.

  This ammonia-oxidizing bacterium respirates and oxidizes ammonia to produce nitrite. Nitrite bacteria respire and oxidize nitrite to produce nitrate. All aerobic bacteria float in free oxygen (water). In order to promote biofiltration of biooxidative degradation chains that incorporate oxygen molecules), it is necessary to grow and activate bacteria. For this purpose, oxygen is replenished mainly in the filter and aquarium where bacteria propagate. is important. “Non-Patent Document 3”

  An apparatus as a method for taking oxygen into a water tank disclosed as an appreciation water tank clean system (see Patent Document 1) From the description of the apparatus described in Japanese Patent Publication No. 2005-14383, circulating water mixed with bubbles is directly sucked into a pump. However, pumping the circulating water mixed with air bubbles causes the cavitation phenomenon (the drive, swirl phenomenon, vibration and noise generated in the hydraulic machine, which causes the trouble of the wing and the pump. ).

  The pump is likely to cause problems if it is used for a long time in constant operation. As estimated from the drawing, the air bubbles taken in are blown upward, the filtration device is installed at the bottom of the water tank, and the bubbles do not convect. One-fifth of the volume of oxygen contained in the bubbles rises directly, requires oxygen in the bottom filter, the oxygen supply efficiency is low for the bacteria to propagate, oxygen supply is normal electric This method has the same effect as the air pump used in the air pump and damages the pump. This method is ineffective. The method of taking in air using the negative pressure on the suction side of the pump is already used in a large device. Has been.

  As a method for supplying oxygen to the bacteria that propagate in the filter and the water tank, an apparatus for injecting air from the suction negative pressure side of a circulation pump attached to the filter is disclosed (Patent Document 2). Description of Patent Publication 2006-042819 Judging from the structure of the drawing, the atmospheric pressure is one atmospheric pressure in addition to the suction pressure of the pumpon, and it is sucked in powerfully, and there is a risk of damage to the pump. ) Is a method of manually adjusting the suction state. Depending on the water flow state in the filter, it may be necessary to adjust the top.

  Needle valves are expensive and costly, and a backflow valve is attached to the air outlet of the water pipe. However, when the operation is stopped, the backflow prevention valve structure comes into contact with water and the valve is activated (closed) and becomes bonded by water. This makes it difficult to recover.

  In contrast to the above-mentioned bacteria, oxygen respiration occurs when oxygen is abundant in other bacteria, which is said to be denitrifying bacteria and facultative anaerobes, and nitrous acid or nitrate respiration is performed in anoxic areas, and nitrate to nitrite and A dream system called breathable anaerobic reduction filtration is being pursued in the aquarium where it is reduced to nitrogen and released into the air.

  In the aquarium, reducing the above-mentioned low-toxic nitrate to nitrogen and detoxifying it does not mean that there is no need for water change, but there is a need for a fairly stable aquarium system. Reduction filtration is roughly divided into a method using Denibor and a method of periodically circulating water by providing a separate anaerobic layer, and has been studied with a great deal of time and waste. “Non-Patent Document 5”

  The problem of anaerobic removal of oxygen in the water and the formation of an anoxic environment (adjustment of flow rate, maintenance problems), stable supply of carbon sources as nutrients for anaerobes (quantity problems, anaerobic This Pseudomonas bacterium returns the nitrate once to nitrite and then reduces it to nitrogen, so if it is not successful, rapid nitrite feedback occurs and the danger of annihilating the living body There is sex.

  The biggest bottleneck is that the system itself is difficult to maintain and it costs money.

In addition, the following patent documents 1-2 and nonpatent literature 1-8 can be mentioned as a well-known technique relevant to this invention.
Patent Publication 2005-14383 (Abstract) Patent Publication 2006-042819 (Summary) URL http: // www. civil. kumamoto-u. ac. jp / suishitu / paper / hydrogen / photosynthesis. The basics of accumulation and adaptation of photosynthetic bacteria that produce hydrogen using organic acid as a carbonic acid source URL http: // jp. wikipedia. org / wiki / Photosynthesis Source: Free Encyclopedia “Wikipedia” URL http: // www. eonet. ne. jp / again / 2006 / aqua_kiso / datsuchiso1. htm Filtration Denitrification (reduction) Filtration (1) What is denitrification? URL http: // www. eonet. ne. jp / ▲ to ▼ again / 2006 / aqua_kiso / roka2. Basics of htm filtration Filtration 16. Basics of Filtration (2) 3 Biological Filtration Pages 1 to 3 URL http: // www. mars. dti. ne. jp / ▲-▼ gec / denit. html anaerobic filtration FAQ pages 1-20 URL http: // www. cwaquatech. com / cquaquatech — 041. htm nitrate filter top URL http: // www. eheim. jp "Aheim General Catalog", page 19 (Features of Aheim Wet and Dry 2229) "Aheim Wet and Dry Filter 2229 Instruction Manual" Imported and Released by Aheim Japan Co., Ltd. Pages 7-10

  As described above, the present invention has a problem of performing denitrification reduction filtration in which nitrate, which is the final metabolite of biofiltration by oxidizing bacteria, is released into nitrogen gas by reducing bacteria to maintain the water quality of the ornamental aquarium, Difficulties in creating a stable anaerobic region (flow adjustment, maintenance issues) Considering the problems of supplying a carbon source for nutrients, supplying oxygen in a stable state to bacteria that propagate in the filter and aquarium To solve the problem by providing an environment that matches the conditions for propagation, growth, and activity of facultative anaerobes from the atmosphere in nature to the aquarium. It is to realize a reduction system water tank.

"Non-patent document 1""Non-patent document 2" for photosynthetic bacteria
Photosynthetic bacteria are a kind of aquatic microorganisms and are widely distributed in eutrophication waters such as lakes, ponds, paddy fields, and soils. This is an anaerobic environment that contains certain nutrient sources at a relatively shallow depth that allows light to pass through. Because the layer is easy to form and suitable for the growth of photosynthetic bacteria, it is said to play an important role in the circulation of organic matter, CO _{2 and} nitrogen in the natural world. Photosynthetic bacteria can assimilate many kinds of organic substances at a relatively high rate, and the safety of the cells is extremely high, and photosynthetic bacteria are greatly characterized by biological characteristics, red non-sulfur bacteria, red sulfur bacteria, green sulfur It is classified into four types: bacteria and gliding filamentous green sulfur bacteria.

The photosynthetic bacteria are characterized by a relatively high growth rate and easy culture.
Can proliferate with oxygen breathing not only under anaerobic conditions but also under dark conditions,
Some bacteria also perform nitric acid respiration by denitrification under anaerobic conditions The surplus sludge produced as a by-product has high nutritional value and high essential amino acid content, so it is used as feed and organic fertilizer.
The cells contain relatively large amounts of pigments (chlorophyll, carotenoids) and vitamins.

  By using photosynthetic bacteria in aquariums, some bacteria also perform nitrate respiration by denitrification under anaerobic conditions by establishing in the aquarium due to the characteristics of photosynthetic bacteria as facultative anaerobes. When placed in an anaerobic environment as a fungus, a reduction filtration system that performs denitrification / nitrate respiration using nitrate-bound oxygen as a respiration substrate can be expected, and a denitrification / nitrate respiration reduction water tank becomes possible.

"Non-patent document 1"
From the characteristics of the photosynthetic bacteria as facultative anaerobes, the growing environment is a kind of aquatic microorganisms and eutrophied water (in the aquarium). Can be bred if the excrement of the water is dissolved, shallow water depth through which light energy (lighting for aquatic plant breeding and ornamentation) is transmitted, anaerobic layer containing certain nutrients (in the filter, in the bottom sand) ) As a place where photosynthetic bacteria as facultative anaerobes grow, there is a place where water is stagnant in the back of the porous filter medium in the filter or in the bottom sand. Although the conditions were in place, the fact that photosynthetic bacteria could not be colonized and propagated before had a problem with the method of transporting bacteria floating in nature with oxygen supplementation.

  Bound oxygen significantly affects the promotion of denitrification / respiratory nitrate reductive filtration by facultative anaerobes (hereinafter referred to as photosynthetic bacteria). The substrate necessary for anaerobic respiration is generated, the supply of free oxygen is necessary for the activity of nitrifying bacteria, and it contradicts the anaerobic nature of the growth culture of photosynthetic bacteria, but the importance of oxygen greatly affects It is necessary.

  For this purpose, there is a problem in the apparatus and method for supplying free oxygen to the bacteria that propagate on the porous filter medium in the filter from the filter inlet and to the bacteria in the water tank.

  In general, an ordinary aquarium is an air pump, and when there is no forced addition of carbon dioxide to the aquatic plants at night, or in an aeration method using an electric air pump that goes into the tanks of discus enthusiasts' large fish breeders Air bubbles are blown in too powerfully, the oxygen (free oxygen) dissolution rate in the water tank is poor, natural oxygen is one fifth of the volume, and the next four fifths are mostly nitrogen and other gases In addition, in order to satisfy the above bacterial activity condition, it is necessary to supply free oxygen to the bacteria that propagate on the filter medium in the filter at all times. However, the cost for power consumption is excessive and uneconomical, and the dissolved rate of free oxygen is poor. Rather, it is more economical to change water regularly.

  It is important to send oxygen and photosynthetic bacteria bacteria from the natural environment in the atmosphere, from the circulating water pipe suction side (7) of the filter (13). The filter (13) is circulated from the water tank (17). There is a filter (13) between the water pump (11) and the suction negative pressure in the pipe on the inlet side of the filter (13) is sucked into the filter, and the filter medium is filled with a porous filter medium. Oxygen in a state close to free oxygen directly to bacteria that propagate in the environment, and newly sucked bacterial bacteria, etc. adhere to or pass through the filter medium and are sent to the aquarium with a circulating water pump. As a eutrophic tank, uneaten food and excrement from living organisms are dissolved, light energy is used for rearing and aquatic aquatic plants and lighting, anaerobic layers are used in filters, bottom sand, and photosynthetic cells. By incorporating abundant oxygen in a state close to free oxygen into an environment suitable for colonization and growth, it is possible to maintain the water quality in the aquarium by denitrification / nitrate respiration at low cost, and denitrification / nitrate respiration reduction. The water pipe (6) of the present invention that makes it possible to realize a system water tank is attached to the circulating water return pipe (7).

  Atmospheric pressure has a pressure of 1 atm (1013.25 hectopascals atm), and if it is sucked into the negative pressure state in the circulating water return pipe during operation, the air is entrained and air bubbles are entrained. Causes cavitation that damages the circulating water pump. (In the atmospheric injection device “Patent Document 2”, fine adjustment is manually performed using a needle valve.)

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 to 3 relate to an embodiment of the present invention, FIG. 1 is a cross-sectional view of an atmospheric pressure reducing part main body, FIG. 2 is a cross-sectional view of an air mixing part water pipe, and FIG. 3 is a system diagram thereof.

  As shown in FIG. 1 to FIG. 3, as an apparatus for taking air into the filter 13 and the water tank 19, an atmosphere 3 is incorporated in the atmospheric pressure reducing part main body 1 air intake part 2 (in the case), and the atmosphere 3 is filled with air. The deionized atmospheric outlet union 4 is connected to the circulating water return pipe 7 and the union 5 of the air mixing section water pipe 6 of the present invention connected to the filter inlet side return pipe 7 by a tube, and the circulating water pump 11 is in operation. The negative pressure in the circulating water return pipe 7 and the pressure in the case 1 of the atmospheric pressure reducing part 1 are made equal to the negative pressure, and the atmosphere throttled by the orifice 3 is sucked and passed through the case, and the atmospheric pressure and the atmospheric pressure (1013 .25 hectopascal atm) is characterized in that it is depressurized by the throttle expansion action, and is caused by the negative pressure in the circulating water return pipe to cause the throttle expansion action.

  The decompressed atmosphere is sent to the union 5 (atmosphere mixing section) inserted into the water pipe 6 through the tube 8 from the atmospheric pressure decompression section main body 1, and the decompressed atmosphere is mixed with the circulating water in the water pipe. It stays in the bag (balloon) state at the tip of the part, and when passing through the negative pressure of the circulating water, it is shredded into small bubbles that are close to free oxygen, and is carried intermittently.

  Small air bubbles in a state close to free oxygen are gently sent into the filter 13 together with new natural bacteria, and the filter medium 14 in the filter 13 acts as a buffer to damage the circulating water pump 11. Some of the air bubbles that are not given to the filter medium 14 will supply oxygen in a state close to free oxygen to the bacteria that propagate here and new bacteria over time.

  As described above, according to the present invention, the atmospheric air pressure is sucked into the circulation pump 11 and the negative pressure is not damaged by air bubbles, but the bacteria are gently and efficiently taken up with oxygen from the outside air. By using a photosynthetic bacterium to supply free oxygen in abundantly, and by culturing and growing, it is possible to provide an energy saving, low-cost denitrification / nitrate respiration reductive filtration system tank 17 by utilizing photosynthetic bacteria. This is a feature.

  The circulating water return pipe 7 from the water tank 17 to the filter 13 is connected to the inlet side of the filter 13 by the air mixed water pipe 6, the atmospheric pressure reducing part main body 1, and the tube 8. Atmospheric pressure reducing part main body 1 to which cock 9 is attached has an atmospheric pressure treated with dust or the like by a strainer at the inlet of atmospheric intake part 2 at orifice 3 installed in atmospheric pressure reducing part main body 1 and has one atmospheric pressure. The atmospheric air is connected to the atmospheric mixed water pipe 6 and the tube 8 attached in the middle of the circulating water return pipe 7 during the operation of the circulating water pump 11, and the atmospheric pressure reduction main body 1 is negative in the circulating water return pipe 7. The atmosphere is sucked and passed by the pressure difference with the negative pressure in the orifice 3 at this time. At this time, the pressure is reduced by the expansion of the throttle.

As a result of the above test using the prototype, (measured on the 104th day since the previous water change)
60 cm water tank Water temperature 24 ° C. pH value: 6 Ammonia: 0 mg / l Nitrous acid: 0 mg / l
Carbon dioxide dissolved amount: 20 mg / l Nitrate: 5. As a result of PPM, the nitrate residual concentration does not exceed 5 PPM, and it is considered that it is reduced by denitrification / nitrate respiration by photosynthetic bacteria. The state is maintained in the best condition, and a phenomenon that bubbles larger and smaller than the bottom sand 16 at the bottom of the aquarium 19 can be confirmed at present, which becomes active when the lighting time is long and uses light energy 18 It is the result of the effect of the introduction of oxygen in a state close to free oxygen efficiently by the atmospheric pressure reduction method of the present invention, which seems to be a function of photosynthetic bacteria of the nature.

  In addition, when a prototype is installed in a 120 cm tank, the nitrate dissolved amount is 20 PPM after one month, and after 10 months the nitrate dissolved amount is reduced to 5 PPM. After the prototype is installed in a 150 cm tank, the nitrate dissolved amount is 50 PPM at the time of installation. The amount of nitrate dissolved after 20 months is further reduced to 5 PPM after 2 months.

  The embodiment and examples of the present invention have been described above, but the scope of the present invention is not limited to this. For example, in the use of a large water tank, the capacity of the atmospheric pressure reduction main body 1 and the air-mixed water conduit 6, The attachment position relationship and the like are appropriately selected according to the situation.

Industrial application fields

  INDUSTRIAL APPLICABILITY The present invention can be used in the fields of appreciation of aquatic organisms such as fish, and in the field of manufacturing and selling filters and useful articles for business growth aquariums.

It is an atmospheric pressure decompression part main part sectional view concerning a 1st embodiment of the present invention. FIG. It is systematic diagrams, such as circulating water.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Atmospheric pressure decompression part main body 2 Atmospheric intake part 3 Orifice 4 Decompression atmospheric outlet union 5 Water pipe inlet union 6 Air mixing part water pipe 7 Circulating water return pipe 8 Connecting tube 9 of atmospheric mixing part water flow pipe and atmospheric pressure reduction part main body 9 Cock DESCRIPTION OF SYMBOLS 10 Backflow prevention valve 11 Circulating water pump 12 Circulating water feed pipe 13 Filter 14 Filter medium 15 Circulating water suction port 16 Water tank bottom sand 17 Water tank 18 Aquatic aquatic aquatic plant growth and appreciation light 19 Water tank 20 Circulating water outlet

  Regarding photosynthetic bacteria, among the bacteria floating in the atmosphere, photosynthetic bacteria are microorganisms that propagate at the water's edge, etc. If they are autotrophic and have basically light and eutrophic water in paddy fields, ponds, swamps, etc. It is a facultative anaerobe that grows and is suitable for the growth of photosynthetic bacteria, so in the aerobic layer it is free oxygen in water, and in the anaerobic layer, it has a relatively fast rate of growth and changes in organic matter in an environment with nitrate bound oxygen as a substrate. Is a fast bacteria.

The photosynthetic bacteria prefer to have water with a lot of organic matter, light is used as energy, the culture is easy, the fungus is safe and the growth rate is fast, and the metabolites in the decomposition of organic matter are nutritious and feed In the anaerobic layer of facultative anaerobes, it grows with free oxygen in water, and in the anaerobic layer, it grows using the bound oxygen of nitrate as a substrate, and denitrification by nitrate respiration. It plays an important role in the circulation of suitable organic matter, nitrous acid, nitrates, vaginal elements, and the natural ecosystem in the aquarium.

DESCRIPTION OF SYMBOLS 1 Atmospheric pressure decompression part main body 2 Atmospheric intake part 3 Orifice 4 Decompression atmospheric outlet union 5 Water pipe inlet union 6 Air mixing part water pipe 7 Circulating water return pipe 8 Connecting tube 9 of atmospheric mixing part water flow pipe and atmospheric pressure reduction part main body 9 Cock DESCRIPTION OF SYMBOLS 10 Backflow prevention valve 11 Circulating water pump 12 Circulating water feed pipe 13 Filter 14 Filter medium 15 Circulating water suction inlet 16 Aquarium bottom sand 17 Aquarium 18 Aquatic aquatic plant growth and ornamental lighting 19 In the aquarium 20 Circulating water outlet 21 Circulation Water flow direction

Anaerobic removal of oxygen in the water to create an anoxic environment (flow rate adjustment, maintenance issues), stable supply of carbon source as anaerobic nutrients (volume issues and outflows outside the anaerobic zone) ), etc. There is a problem, the Pseudomonas bacteria for the reduction from the back of the nitrate to once nitrite to nitrogen, occur rapid nitrous acid (poison) feedback to be done well, also, poor oxygen area and the oxygen-free the catabolic sulfide reduction exist region is reduced by sulphate-reducing bacteria that can cause anoxic region, hydrogen sulfide is generated, the hydrogen sulfide is a very dangerous toxic gas.

DESCRIPTION OF SYMBOLS 1 Atmospheric pressure decompression part main body 2 Atmospheric intake part 3 Orifice 4 Decompression atmospheric outlet union 5 Water pipe inlet union 6 Air mixing part water pipe 7 Circulating water return pipe 8 Connecting tube 9 of atmospheric mixing part water flow pipe and atmospheric pressure reduction part main body 9 Cock DESCRIPTION OF SYMBOLS 10 Backflow prevention valve 11 Circulating water pump 12 Circulating water feed pipe 13 Filter 14 Filter medium 15 Circulating water suction inlet 16 Aquarium bottom sand 17 Aquarium 18 Aquatic aquatic plant growth and ornamental lighting 19 In the aquarium 20 Circulating water outlet 21 Circulation Water flow direction

Anaerobic removal of oxygen in the water to create an anoxic environment (flow rate adjustment, maintenance), stable supply of carbon sources as nutrients for anaerobic bacteria (volume issues and outflows outside the anaerobic region), etc. This Pseudomonas bacterium returns the nitrate to nitrite and then reduces it to nitrogen. If it is not successful, rapid nitrite (poison) feedback occurs, and there are anoxic and anoxic regions. Te is catabolic sulfide reduction is reduction by sulfate-reducing bacteria that occur in oxygen-free region, the hydrogen sulfide is generated, the hydrogen sulfide is a very dangerous poisonous gas, bait for denitrifying bacteria Denitorogen, systems using Shiporakkusu etc. The biggest bottleneck is that it is difficult to maintain itself and it costs money.

In aquatic plant aquarium, the foster growth of aquatic plants is carbon dioxide important to test the light photosynthesis, artificial carbon dioxide excess to force added by installing a supply facility to the outside air to the conventional water tank, In recent years, it is carbon dioxide gas, which is a concern for global warming as a greenhouse gas, and it costs money for maintenance of gas fee facilities, leading to natural destruction .

In general, an ordinary appreciation tank forcibly adds artificial carbon dioxide to daytime aquatic plants and pumps air at night, and an aeration method using an electric air pump such as discus enthusiasts blows air bubbles enormously. Arrive on the surface of the water early , contact time with water is short , oxygen (free oxygen) dissolved in the water tank is bad, natural oxygen is one-fifth of the volume of the atmosphere , the next four-fifth is nitrogen and 0 a .03% carbon dioxide and other gas contained, to meet the conditions of the activity of the bacteria, the bacteria that breed in the filter medium in the filter must be supplied constantly gently free oxygen in bubbles of minute As the above-mentioned normal supply method, the power cost is excessive and the use efficiency of the atmosphere is poor and uneconomical.

According to the present invention, the air in a way that sucked into the negative pressure by reducing the pressure one atmosphere atmosphere circulating water pump 11, as described above, without damaging the bubbles of atmospheric contamination, a way to push taken efficiently atmosphere It is possible to use and supply natural carbon dioxide containing 0.03% of the oxygen in the water, and contribute to the environment in a small amount by not using artificial carbon dioxide for the aquatic plants in the above-mentioned aquatic aquarium . In order to establish and use photosynthetic bacteria facultative anaerobes floating in the atmosphere, it is possible to realize an energy-saving, low-cost denitrification nitrate respiration reduction filtration system tank 17 by supplying abundant free oxygen and culturing and growing. A featured atmospheric pressure reducing device.

Test results using the above prototype (measured on the 104th day since the previous water change)
60cm water tank Water temperature 24 degrees pH 6 Ammonia 0mg / liter Nitrous acid 0mg / liter Carbon dioxide dissolved amount 20mg / liter This value is the optimum dissolved amount for aquatic plant growth, and 0.03% of carbon dioxide contained in the atmosphere are incorporated taken, had been added prior enforce artificial gas, equipment expenses維等but trace amounts is not necessary to contribute energy saving, environmental, nitrate residual concentration 5mg / liter or less, denitrification nitrate respiration by photosynthetic bacteria In the water tank, the state of the aquarium 19 is maintained in the best state against the aquatic organisms in the aquarium 19 without long-term water change. Bubbles larger and smaller than the bottom sand at the bottom of the aquarium 19 rise. Symptoms can see the current, this seems to work in photosynthetic bacteria properties utilizing becomes light energy 18 to actively and lighting time is long, atmospheric by atmospheric pressure vacuum method of the present invention Which is the oxygen or the like efficiently and effectively used a sign of things that can be contained in the atmosphere uptake.

The present invention is toxic as a metabolite at the end of the oxidative filtration filter, in which physical filtration of waste products such as aquatic aquatic plants and fish, biofiltration oxidative filtration by bacteria from nature is generally performed to maintain water quality in the ornamental aquarium. It becomes a low nitrate, and when this nitrate also accumulates in large quantities reaches 30 mg / liter, it will adversely affect aquatic organisms that cause growth inhibition and immune system inhibition. The present invention relates to a method and an apparatus for reducing the amount of accumulated nitrate.

Conventionally, in maintaining the quality of water in an ornamental aquarium, physical filtration of wastes such as food residue and fish excrement aquatic plants and biological filtration of biooxidative degradation chains are performed.

What is commonly referred to as aquarium filtration is oxidation filtration by oxidizing bacteria.
Waste products, excretion of manure,
Production of ammonia by spoilage aerobic bacteria,
From aerobic bacteria to ammonia to nitrite,
From nitrous acid to nitrate by aerobic bacteria,

This beneficial bacterium is mainly an organic vegetative bacterium, a bacterium that breaks down the organic matter of food and fish excretion from the air into the aquarium. The growth speed is fast in minutes, and ammonia that generates oxygen using oxygen is useful for fish etc. Is harmful.

Nitrite, which uses ammonia as a nutrient, produces nitrite using oxygen in Baxeria that decomposes ammonia and decomposes ammonia, is slow, and nitrite that takes 2 to 3 days is also toxic.

Nitrite-chlorinated bacteria that use nitrite as a nutrient, bacteria that decompose nitrite, which are slow to grow and take 2 to 3 days, but produce harmless nitrates. Nitrate as a final metabolite is harmless, but a large amount of low-toxic nitrate is accumulated, and when it reaches 30 mg / liter, it adversely affects aquatic organisms that inhibit growth and immunity. Discharge outside the aquarium by changing water by about one third of the aquarium.

The representatives of the aerobic bacteria are genus Nitrosomonas and Nitrobacter. These bacteria take up oxygen and nutrients in the aquarium, acquire energy, maintain life, and create cellular substances for growth.

This ammonia-oxidizing bacterium respirates and oxidizes Ammona to produce nitrite. Nitrite bacterium respires and oxidizes nitrite to produce nitrate.
All aerobic bacteria incorporate free oxygen (oxygen molecules floating in the water). In order to promote the biofiltration of the biooxidative degradation chain, it is necessary to grow and activate the bacteria, and the growth of the bacteria is the seed. It is important to replenish oxygen mainly in the filter and water tank.

An apparatus as a method for taking oxygen into a water tank disclosed as a viewing water tank clean system (see Patent Document 1) From the description of the apparatus described in Japanese Patent Publication No. 2005-143484, circulating water mixed with bubbles is directly sucked into a pump. But
Injecting circulating water mixed with air bubbles into the pump causes the cavitation phenomenon (driving, swirling, vibration and noise in hydraulic machines, which causes damage to the wings and pump), which is the most troublesome for the pump. .

There is a great possibility that problems will occur if the pump is used continuously for a long time, and it is estimated from the drawing that the air bubbles taken in are blown upward and the filtration device is installed at the bottom of the water tank, and the bubbles do not convect. One-fifth of the volume of oxygen contained in the air bubbles rises directly, requires oxygen in the bottom filter, the oxygen supply efficiency is low for the bacteria to propagate, oxygen supply is normal electric This method has the same effect as the aeration performed by the air pump, and damages the pump. This method is not effective. In addition, the method of taking in air using the negative pressure on the suction side of the pump is already used in large devices. Yes.

In contrast to the above-mentioned bacteria, oxygen respiration occurs when oxygen is abundant in oxygen, which is said to be denitrifying bacteria and facultative anaerobes, and nitrous acid or nitrate respiration is performed in anoxic areas, from nitrate to nitrite and nitrogen. A dream system called breathable anaerobic reduction filtration is being pursued in the aquarium world where it is changed and reduced and released into the air.

In the aquarium, the above-mentioned low-toxic nitrate is reduced to nitrogen and detoxified, so it is not possible to change the water to zero, but a fairly stable aquarium system is being sought. Anaerobic reduction filtration is divided into a method using Denibor and a method of periodically circulating water by providing an anaerobic layer, and research has been conducted with a great deal of time and waste.

Anaerobic removal of oxygen in the water to create an anoxic environment (flow rate adjustment, maintenance), stable supply of carbon sources as nutrients for anaerobic bacteria (volume issues and outflows outside the anaerobic region), etc. This Pseudomonas bacterium returns the nitrate once to nitrite and then reduces it to nitrogen.If it is not successful, rapid nitrite (poisonous) feedback occurs, and there are anoxic and anoxic regions. Catabolic sulfide reduction is a reduction by sulfur-reducing bacteria that occurs in anoxic regions. Hydrogen sulfide is generated. Hydrogen sulfide is a very dangerous and extremely toxic gas, and the system itself that uses denitrogen bait denitrogen, sipolax, etc. The biggest bottleneck is that it is difficult to maintain and costs money.

In the aquatic aquarium, carbon dioxide is important for the growth and growth of aquatic plants, along with the light of the photosynthetic action. In recent years, it is carbon dioxide gas, which is a concern for global warming as a greenhouse gas, and it costs money for maintenance of gas fee facilities, leading to natural destruction.

The following Patent Document 1 and Non-Patent Documents 1 to 8 can be listed as known techniques related to the present invention.
Patent Publication 2005-14383 (Abstract) URLhttp: //www.civil.kumamoto-u.ac.jp/suishitu/paper/hydrogen/photosynthesis.htmBasics of accumulation and acclimatization of photosynthetic bacteria that produce hydrogen using organic acids as a carbon source URL http://jp.wikipedia.org/wiki/Photosynthesis Source: Free Encyclopedia Wikipedia URL http://www.eonet.ne.jp/again/2006/aqua-kiso/datsuchiso1.htm Filtration Denitrification (reduction) Filtration (1) What is denitrification? Pages 1 to 3 URL http://www.eonet.ne.jp/again/2006/aqua-kiso/roka2.htm Basics of Filtration 16. Basics of Filtration (2) 3 Biological Filtration Pages 1 to 3 URL http://www.mars.dti.ne.jp/gec/denit.html Anaerobic Filtration FAQ Pages 1 to 20 URLhttp: //www.cwaquatech.com/cwaquatech-041.htmNight rate filter top URLhttp: //www.eheim.jp “Aheim General Catalog”, page 19 (Characteristics of Aheim Wet and Dry 2229) "Aheim Wet and Dry Filter 2229 Instruction Manual" Imported and Released by Aheim Japan Co., Ltd. Pages 7 to 10

As described above, the present invention has a problem of performing denitrification reduction filtration in which nitrate, which is the final metabolite of biofiltration by oxidizing bacteria, is released into nitrogen gas by reducing bacteria to maintain the water quality of the ornamental aquarium, Difficult to create a stable anaerobic region (flow adjustment, maintenance issues) Considering the problems of supplying nutrient carbon sources, supplying oxygen in a stable state to bacteria that propagate in the filter and the water tank, etc. Resolving the problem and providing an environment that matches the conditions for propagation and growth activity of facultative anaerobes from the atmosphere in the atmosphere to realize an energy-saving, low-cost facultative anaerobic denitrification nitrate respiration reduction system tank There is to do.

As for photosynthetic bacteria, among the bacteria floating in the atmosphere, photosynthetic bacteria are microorganisms that propagate at the water's edge, etc. Autotrophic organisms If there is basically light or eutrophied water in paddy fields or swamps, photosynthetic bacteria It is a facultative anaerobic bacterium that is suitable for growth, so it is a free oxygen in water in the aerobic region, and in the anaerobic region, it is a bacteria that has a relatively fast rate of growth and changes in the quality of organic matter in an environment with nitrate bound oxygen. is there.

The photosynthetic bacteria prefer to have water with a lot of organic matter, light is used as energy, the culture is easy, the fungus is safe, and the growth rate is fast. In the anaerobic region, it grows with free oxygen in water and grows in the anaerobic region using the bound oxygen of the nitrate as a substrate, denitrifying by nitrate respiration, the environmental conditions in the ornamental tank are suitable for breeding and growth, organic matter, nitrous acid, It can be used and expected for denitrification / reduction filtration by allowing nitrate nitrogen to circulate and establish and propagate in the aquarium, which plays a major role in the natural ecosystem in the aquarium.

Due to the characteristics of photosynthetic bacteria as facultative anaerobes using aquatic bacteria in aquariums, some bacteria also perform nitrate respiration by denitrification under anaerobic conditions by establishing them in the aquarium. When placed in an anaerobic environment, a reduction filtration system that performs denitrification nitrate respiration using the bound oxygen of nitrate as its substrate can be expected, and a denitrification nitrate respiration reduction filtration water tank becomes possible.

Because of the characteristics of the photosynthetic bacteria as facultative anaerobes, the growth environment is a kind of aquatic microorganisms and eutrophied water (in the aquarium). Shallow water depth through which light energy (lighting for aquatic aquatic aquatic life and viewing) is transmitted, anaerobic layers containing certain nutrient sources (in the filter, in the bottom sand) The place where photosynthetic bacteria as facultative anaerobes propagate is located in the back of the porous filter medium in the filter or in places where water is stagnant in the bottom sand. However, the fact that photosynthetic bacteria could not be established and propagated for a long time had a problem in the method of transferring bacteria floating in nature with oxygen supplementation.

Bound oxygen greatly influences the promotion of denitrification nitrate respiratory reduction filtration by facultative anaerobes (hereinafter referred to as photosynthetic bacteria). The activity of the oxidative chain of biological filtration by normal nitrifying bacteria, the bound oxygen of nitrate, the anaerobic of facultative anaerobes The substrate necessary for respiration is generated, the supply of free oxygen is necessary for the activity of nitrifying bacteria, and it contradicts the anaerobic nature of the growth culture of photosynthetic bacteria, but the importance of oxygen greatly affects and is necessary It becomes.

For this purpose, a device and a method for supplying free oxygen to the bacteria that propagate from the filter inlet to the porous filterability in the filter and the bacteria in the water tank become a problem.

In general, an ordinary appreciation tank forcibly adds artificial carbon dioxide to daytime aquatic plants and pumps air at night, and an aeration method using an electric air pump such as discus enthusiasts blows air bubbles enormously. It reaches the surface of the water quickly, the contact time with water is short, and the dissolved rate of oxygen (free oxygen) etc. in the water tank is poor. Natural oxygen is one fifth of the volume of the atmosphere and the next four fifths are nitrogen and 0. In order to satisfy the above-mentioned bacterial activity condition, which is the carbon dioxide and other gases contained in 03%, the bacteria that propagate on the filter medium in the filter need to be supplied with free oxygen gently and constantly with minute bubbles. In addition, the above-mentioned normal supply method is expensive and requires too much power, and the use efficiency of the atmosphere is poor and uneconomical.

It is important to send oxygen and photosynthetic bacteria bacteria from the natural environment in the atmosphere, from the circulating water pipe suction side (7) of the filter (13). The filter (13) is circulated from the water tank (17). Although there is a method of sucking the negative pressure suction inlet side in the pipe of the filter (13) has the filter (13) between the water pump (11), the incorporation of air directly there one atmosphere to atmosphere The present invention is a device that reduces the pressure of the atmosphere, and is a device that gently introduces the air without damaging the pump. The operation will be described later . filter media (14) and the state of the oxygen near the direct free oxygen to bacteria that breed in the filter medium (14) is filled, also bacteria bacteria like sucked in Xin filter medium (14) attached or passing Is sent to the water tank (19) with the circulating pump, the photosynthetic bacterium in the water tank that eutrophication as a habitat characteristics to (19), food and leftovers, state of dissolved excreta from the body, as the light energy Lighting for aquatic plants and aquaculture (18) , anaerobic filter (13), bottom sand (16) , oxygen in a state close to free oxygen in an environment suitable for colonization and growth of photosynthetic bacteria . The atmospheric pressure reducing device main body (1) and the water pipe (6) are attached to the circulating water return pipe (7), and it is possible to maintain the water quality in the water tank by denitrating nitric acid respiration at low cost and easily. Realization of a reduction system water tank becomes extremely possible.

Atmospheric pressure has a pressure of 1 atm (1013.25 hectopascals), and letting the air inhale into the negative pressure state in the circulating water return pipe during operation entails energetic air entrainment and entrained air bubbles. Causes cavitation that damages the circulating water pump.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 to 3 relate to an embodiment of the present invention, and FIG. 1 is a schematic cross-sectional view of an atmospheric pressure reducing part main body.
FIG. 2 is a schematic cross-sectional view of the air mixing unit water pipe, and FIG. 3 is a system diagram thereof.

As shown in FIG. 1 to FIG. 3, as a device for taking in the atmosphere into the filter (13) in the water tank (19), the atmospheric pressure reducing part main body (1) and the air intake part (2) are attached to the tip in the case. > Incorporating the orifice (3), the atmospheric pressure reducing part main body (1) from the reduced pressure atmospheric outlet union (4) to the circulating water return pipe (7) attached to the circulating water return pipe (6) flow pipe inlet union ( 5) and the connecting tube (8), the negative pressure in the circulating water return pipe (7) during operation of the circulating water pump (11) and the pressure in the atmospheric pressure reducing body (1) are set to the same negative pressure. The atmospheric pressure depressurization part main body (1) in the orifice (3) stays at one atmospheric pressure with a negative pressure in the case. At this time, it is throttled by the orifice and depressurized by the expansion action. , It is characterized by a suction throttling action with this circulating water return negative pressure.

The decompressed atmosphere is placed in the atmosphere mixing unit union (5) inserted into the water pipe (6) by the tube (8) from the atmospheric pressure decompression unit body, and the decompressed atmosphere is mixed with the circulating water in the water pipe. remains next to balloons state in part lips, are attracted to the negative pressure of the circulating water cut thousand becomes small bubbles in a state close to free oxygen going transported to intermittently.

Small air bubbles in a state close to free oxygen are gently sent into the filter (13) together with new natural bacteria, and the filter medium (14) in the filter (13) serves as a buffer, and a circulating water pump ( 11) Some bubbles that do not damage the filter medium (14) supply the oxygen in a state close to free oxygen over time to the bacteria that propagate here and the new bacteria.

According to the present invention, as described above, the circulation pump (11) reduces the atmospheric pressure and sucks the atmospheric pressure, and the air is efficiently taken in without being damaged by air bubbles. Oxygen and natural carbon dioxide contained in 0.03% can be used and supplied, and the aquatic plants in the aquatic plants (17) contribute to the environment by not using artificial carbon dioxide in the aquarium (19) It is characterized by the fact that an energy-saving low-cost reductive filtration system tank (17) for denitrating nitric respiration can be realized by supplying abundant free oxygen to establish and use photosynthetic bacteria floating in the atmosphere. The atmospheric pressure reducing device (1).

In the middle of the circulating water return pipe (7) from the water tank (17) to the filter (13) on the filter (13) inlet side, an air mixed water pipe (6), an atmospheric pressure reducing part main body (1), and a tube (8 ), And in the middle of which the backflow prevention valve (10) and the cock (9) are attached, the atmospheric pressure reducing part main body (1) has an atmosphere treated with dust or the like by the strainer at the air intake part (2) inlet. Atmosphere having one atmospheric pressure with the orifice (3) built in the main body (1) of the atmospheric pressure reducing part is an atmospheric mixed water pipe installed in the middle of the circulating water return pipe (7) during operation of the circulating water pump (11). (6) a negative pressure and to the pressure, the air which has remained in the orifice (3) is a negative pressure in the tube (8) circulating water to tract of atmospheric vacuum body that is connected (1) (7) which passes sucked in the pressure difference between this time, it is throttled by the orifice (3), diaphragm Rise It is reduced by the action.

Test results using the above prototype (measured on the 104th day since the previous water change)
60cm tank Water temperature 24 degrees pH 6 Ammonia 0mg / liter Nitrous acid 0mg / liter Carbon dioxide dissolved amount 20mg / liter This value is the optimum dissolved amount for growing aquatic plants, and the carbon dioxide contained in the atmosphere is 0.03%. The conventional artificial carbon dioxide gas has been forcibly added, but the maintenance cost of equipment is not required , but it is trace amount, but it can contribute to energy saving and environment. Nitrate residual concentration of 5 mg / liter or less is denitrified nitrate by photosynthetic bacteria The bottom of the bottom of the aquarium (19) maintains the best state in the aquarium (19) with respect to aquatic organisms in the aquarium (19) without reduction of water for a long time without reduction of water. It can be confirmed that bubbles larger and smaller than sand (16) are present, and this seems to be a function of photosynthetic bacteria with the property of using light energy when the lighting (18) time is long. Such as oxygen efficiency atmospheric vacuum method of the present invention contained in the atmosphere takes in air well, it is an indication that can effectively use.

When a prototype is installed in a 120 centimeter tank, the nitrate dissolved amount is 20 mg / liter, one month later, 10 mg / liter, and two months later, the nitrate dissolved amount is reduced to 5 mg / liter,
In a 150 cm water tank, the amount of nitrate dissolved at the time of mounting the prototype was as high as 50 mg / liter, and after one month, 20 mg / liter, and the amount of nitrate dissolved after two months decreased to 5 mg / liter.

Although the embodiments and examples of the present invention have been described above, the scope of the present invention is not limited to this. For example, in a large water tank, the capacity of the atmospheric pressure reduction main body (1) and the air mixed water pipe (6) The mounting position relationship and the like are appropriately selected according to the situation.

INDUSTRIAL APPLICABILITY The present invention can be used in the field of appreciation of aquatic organisms such as fish and water tanks for business growth or in the field of manufacturing and selling useful filters and growing articles.

1 is a schematic cross-sectional view of an atmospheric pressure reducing unit main body according to a first embodiment of the present invention. It is sectional drawing of an air mixing water pipe outline . It is systematic diagrams, such as circulating water.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Atmospheric pressure decompression part main body 2 Atmospheric intake part 3 Orifice 4 Decompression atmosphere outlet union 5 Water pipe inlet union 6 Air mixing part water pipe 7 Circulating water return pipe 8 Connecting tube 9 of atmospheric mixing part water passage and atmospheric pressure reduction body 9 Cock 10 Backflow prevention valve 11 Circulating water pump 12 Circulating water feed pipe 13 Filter 14 Filter medium 15 Circulating water suction port 16 Aquarium bottom sand 17 Aquarium 18 Aquarium biological aquatic plant growth and appreciation light 19 Aquarium 20 Circulating water outlet

The present invention is toxic as a metabolite at the end of the oxidative filtration filter, in which physical filtration of waste products such as aquatic aquatic plants and fish, biofiltration oxidative filtration by bacteria from nature is generally performed to maintain water quality in the ornamental aquarium. It becomes a low nitrate, and when this nitrate also accumulates in large quantities reaches 30 mg / liter, it will adversely affect aquatic organisms that cause growth inhibition and immune system inhibition. The present invention relates to a method and an apparatus for reducing the amount of accumulated nitrate.

Conventionally, in maintaining the quality of water in an ornamental aquarium, physical filtration of wastes such as food residue and fish excrement aquatic plants and biological filtration of biooxidative degradation chains are performed.

What is commonly referred to as aquarium filtration is oxidation filtration by oxidizing bacteria.
Waste products, excretion of manure,
Production of ammonia by spoilage aerobic bacteria,
From aerobic bacteria to ammonia to nitrite,
From nitrous acid to nitrate by aerobic bacteria,

This beneficial bacterium is mainly an organic vegetative bacterium, a bacterium that breaks down the organic matter of food and fish excretion from the air into the aquarium. The growth speed is fast in minutes, and ammonia that generates oxygen using oxygen is useful for fish etc. Is harmful.

Nitrite, which uses ammonia as a nutrient, produces nitrite using oxygen in Baxeria that decomposes ammonia and decomposes ammonia, is slow, and nitrite that takes 2 to 3 days is also toxic.

Nitrite-chlorinated bacteria that use nitrite as a nutrient, bacteria that decompose nitrite, which are slow to grow and take 2 to 3 days, but produce harmless nitrates. Nitrate as a final metabolite is harmless, but a large amount of low-toxic nitrate is accumulated, and when it reaches 30 mg / liter, it adversely affects aquatic organisms that inhibit growth and immunity. Discharge outside the aquarium by changing water by about one third of the aquarium.

The representatives of the aerobic bacteria are genus Nitrosomonas and Nitrobacter. These bacteria take up oxygen and nutrients in the aquarium, acquire energy, maintain life, and create cellular substances for growth.

This ammonia-oxidizing bacterium respirates and oxidizes Ammona to produce nitrite. Nitrite bacterium respires and oxidizes nitrite to produce nitrate.
All aerobic bacteria incorporate free oxygen (oxygen molecules floating in the water). In order to promote the biofiltration of the biooxidative degradation chain, it is necessary to grow and activate the bacteria, and the growth of the bacteria is the seed. It is important to replenish oxygen mainly in the filter and water tank.

An apparatus as a method for taking oxygen into a water tank disclosed as a viewing water tank clean system (see Patent Document 1) From the description of the apparatus described in Japanese Patent Publication No. 2005-143484, circulating water mixed with bubbles is directly sucked into a pump. However, it is the most troublesome cavitation phenomenon (driving, swirl phenomenon, vibration and noise caused by hydraulic machinery, causing damage to the wing and the pump. ), The atmospheric pressure has a pressure of 1 atm (1013.25 hectopascals), and if this is sucked into the negative pressure in the circulating water return pipe during operation, the atmosphere is entrained , Entrained air bubbles cause cavitation that damages the circulating water pump .

There is a great possibility that problems will occur if the pump is used continuously for a long time, and it is estimated from the drawing that the air bubbles taken in are blown upward and the filtration device is installed at the bottom of the water tank, and the bubbles do not convect. One-fifth of the volume of oxygen contained in the air bubbles rises directly, requires oxygen in the bottom filter, the oxygen supply efficiency is low for the bacteria to propagate, oxygen supply is normal electric This method has the same effect as the aeration performed by the air pump, and damages the pump. This method is not effective. In addition, the method of taking in air using the negative pressure on the suction side of the pump is already used in large devices. Yes.

In contrast to the above-mentioned bacteria, another bacterium deoxygenates and facultative anaerobes in the oxygen-rich state, breathes oxygen, and in the hypoxic region, breathes nitrous acid or nitrate, converting nitrate to nitrite and nitrogen. A dream system called breathable anaerobic reduction filtration is being pursued in the aquarium world where it is changed and reduced and released into the air.

In the aquarium, the above-mentioned low-toxic nitrate is reduced to nitrogen and detoxified, so it is not possible to change the water to zero, but a fairly stable aquarium system is being sought. Anaerobic reduction filtration is divided into a method using Denibor and a method of periodically circulating water by providing an anaerobic layer, and research has been conducted with a great deal of time and waste.

Anaerobic removal of oxygen in the water to create an anoxic environment (flow rate adjustment, maintenance), stable supply of carbon sources as nutrients for anaerobic bacteria (volume issues and outflows outside the anaerobic region), etc. This Pseudomonas bacterium returns the nitrate once to nitrite and then reduces it to nitrogen.If it is not successful, rapid nitrite (poisonous) feedback occurs, and there are anoxic and anoxic regions. Catabolic sulfide reduction is a reduction by sulfur-reducing bacteria that occurs in anoxic regions. Hydrogen sulfide is generated. Hydrogen sulfide is a very dangerous and extremely toxic gas, and the system itself that uses denitrogen bait denitrogen, sipolax, etc. The biggest bottleneck is that it is difficult to maintain and costs money.

In the aquatic aquarium, carbon dioxide is important for the growth and growth of aquatic plants, along with the light of the photosynthetic action. In recent years, it is carbon dioxide gas, which is a concern for global warming as a greenhouse gas, and it costs money for maintenance of gas fee facilities, leading to natural destruction.

The following Patent Document 1 and Non-Patent Documents 1 to 8 can be listed as known techniques related to the present invention.
Patent Publication 2005-14383 (Abstract) URLhttp: //www.civil.kumamoto-u.ac.jp/suishitu/paper/hydrogen/photosynthesis.htmBasics of accumulation and acclimatization of photosynthetic bacteria that produce hydrogen using organic acids as a carbon source URL http://jp.wikipedia.org/wiki/Photosynthesis Source: Free Encyclopedia Wikipedia URL http://www.eonet.ne.jp/again/2006/aqua-kiso/datsuchiso1.htm Filtration Denitrification (reduction) Filtration (1) What is denitrification? Pages 1 to 3 URL http://www.eonet.ne.jp/again/2006/aqua-kiso/roka2.htm Basics of Filtration 16. Basics of Filtration (2) 3 Biological Filtration Pages 1 to 3 URL http://www.mars.dti.ne.jp/gec/denit.html Anaerobic Filtration FAQ Pages 1 to 20 URLhttp: //www.cwaquatech.com/cwaquatech-041.htmNight rate filter top URLhttp: //www.eheim.jp “Aheim General Catalog”, page 19 (Characteristics of Aheim Wet and Dry 2229) "Aheim Wet and Dry Filter 2229 Instruction Manual" Imported and Released by Aheim Japan Co., Ltd. Pages 7 to 10

As described above, the present invention has a problem of performing denitrification reduction filtration in which nitrate, which is the final metabolite of biofiltration by oxidizing bacteria, is released into nitrogen gas by reducing bacteria to maintain the water quality of the ornamental aquarium, Difficult to create a stable anaerobic region (flow adjustment, maintenance issues) Considering the problems of supplying nutrient carbon sources, supplying oxygen in a stable state to bacteria that propagate in the filter and the water tank, etc. Resolving the problem and providing an environment that matches the conditions for propagation and growth activity of facultative anaerobes from the atmosphere in the atmosphere to realize an energy-saving, low-cost facultative anaerobic denitrification nitrate respiration reduction system tank There is to do.

As for photosynthetic bacteria, among the bacteria floating in the atmosphere, photosynthetic bacteria are microorganisms that propagate at the water's edge, etc. Autotrophic organisms If there is basically light or eutrophied water in paddy fields or swamps, photosynthetic bacteria It is a facultative anaerobic bacterium that is suitable for growth, so it is a free oxygen in water in the aerobic region, and in the anaerobic region, it is a bacteria that has a relatively fast rate of growth and changes in the quality of organic matter in an environment with nitrate bound oxygen as a substrate. is there.

The photosynthetic bacteria prefer to have water with a lot of organic matter, light is used as energy, the culture is easy, the fungus is safe, and the growth rate is fast. In the anaerobic region, it grows with free oxygen in water and grows in the anaerobic region using the bound oxygen of the nitrate as a substrate, denitrifying by nitrate respiration, the environmental conditions in the ornamental tank are suitable for breeding and growth, organic matter, nitrous acid, It can be used and expected for denitrification / reduction filtration by allowing nitrate nitrogen to circulate and establish and propagate in the aquarium, which plays a major role in the natural ecosystem in the aquarium.

Due to the characteristics of photosynthetic bacteria as facultative anaerobes using aquatic bacteria in aquariums, some bacteria also perform nitrate respiration by denitrification under anaerobic conditions by establishing them in the aquarium. When placed in an anaerobic environment, a reduction filtration system that performs denitrification nitrate respiration using the bound oxygen of nitrate as its substrate can be expected, and a denitrification nitrate respiration reduction filtration water tank becomes possible.

Because of the characteristics of the photosynthetic bacteria as facultative anaerobes, the growth environment is a kind of aquatic microorganisms and eutrophied water (in the aquarium). Shallow water depth through which light energy (lighting for aquatic aquatic aquatic life and viewing) is transmitted, anaerobic layers containing certain nutrient sources (in the filter, in the bottom sand) The place where photosynthetic bacteria as facultative anaerobes propagate is located in the back of the porous filter medium in the filter or in places where water is stagnant in the bottom sand. However, the fact that photosynthetic bacteria could not be established and propagated for a long time had a problem in the method of transferring bacteria floating in nature with oxygen supplementation.

Bound oxygen greatly influences the promotion of denitrification nitrate respiratory reduction filtration by facultative anaerobes (hereinafter referred to as photosynthetic bacteria). The activity of the oxidative chain of biological filtration by normal nitrifying bacteria, the bound oxygen of nitrate, the anaerobic of facultative anaerobes The substrate necessary for respiration is generated, the supply of free oxygen is necessary for the activity of nitrifying bacteria, and it contradicts the anaerobic nature of the growth culture of photosynthetic bacteria, but the importance of oxygen greatly affects and is necessary It becomes.

For this purpose, a device and a method for supplying free oxygen to the bacteria that propagate from the filter inlet to the porous filterability in the filter and the bacteria in the water tank become a problem.

In general, an ordinary appreciation tank forcibly adds artificial carbon dioxide to daytime aquatic plants and pumps air at night, and an aeration method using an electric air pump such as discus enthusiasts blows air bubbles enormously. It reaches the surface of the water quickly, the contact time with water is short, and the dissolved rate of oxygen (free oxygen) etc. in the water tank is poor. Natural oxygen is one fifth of the volume of the atmosphere and the next four fifths are nitrogen and 0. In order to satisfy the above-mentioned bacterial activity condition, which is the carbon dioxide and other gases contained in 03%, the bacteria that propagate on the filter medium in the filter need to be supplied with free oxygen gently and constantly with minute bubbles. In addition, the above-mentioned normal supply method is expensive and requires too much power, and the use efficiency of the atmosphere is poor and uneconomical.

It is important to send oxygen and photosynthetic bacteria bacteria from the natural environment in the atmosphere, from the circulating water pipe suction side (7) of the filter (13). The filter (13) is circulated from the water tank (17). There is a filter (13) between the water pump (11) and the suction negative pressure in the inlet pipe of this filter (13). There is one atmosphere in the atmosphere. The present invention is a device that reduces the pressure of the atmosphere, and is a device that gently introduces the air without damaging the pump. The operation will be described later. Oxygen in a state close to free oxygen directly in bacteria filled with the filter medium (14) and propagating on the filter medium (14), and newly sucked bacterial bacteria, etc. adhere to or pass through the filter medium (14). As a light energy, the food left uneaten and the excrement from the living body are melted into the aquarium (19) eutrophied as a growth environment from the characteristics of the photosynthetic bacteria sent to the aquarium (19) by a circulation pump. Oxygen in the state close to free oxygen in an environment suitable for colonization and growth of photosynthetic bacteria in a filter (13) bottom sand (16) as an anaerobic layer (18) for aquatic plants and aquatic animals breeding and viewing The atmospheric pressure reducing device main body (1) and the water pipe (6) are attached to the circulating water return pipe (7), and it is possible to maintain the water quality in the water tank by denitrating nitric acid respiration at low cost and easily. Realization of a reduction system water tank becomes extremely possible.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 to 3 relate to an embodiment of the present invention, and FIG. 1 is a schematic cross-sectional view of an atmospheric pressure reducing part main body.
FIG. 2 is a schematic cross-sectional view of the air mixing unit water pipe, and FIG. 3 is a system diagram thereof.

A synthetic resin material is an elastic orifice (3) according to claim 1 which is a cornerstone of the present invention, by molding the cap-shaped, the processing of drilling and machining stabbing sharp portion of the needle or the like, especially Strictly speaking, the state of the processed part using the elastic phenomenon of the material (the property that the object whose shape and volume are changed by the external force recovers to its original state again when the force is removed) is extremely small. In the case of using a state in which a hole is drilled and shrinks back to its original state, and the restored state is a hole state, resistance to the passage of the atmosphere is weak, so the atmospheric pressure depressurization effect of the present invention does not occur and air is mixed It is not possible to make bubbles close to free oxygen (oxygen molecules floating in the water) at the tip of the mixed water pipe (6), and to make bubbles close to free oxygen by using the elastic phenomenon described above. Characteristic orifice (3)

As shown in FIG. 1 to FIG. 3, as a device for taking in the atmosphere into the filter (13) in the water tank (19), the orifice is placed at the tip of the atmospheric pressure reducing part main body (1) in the case of the air intake part (2). (3) built-in, the atmospheric pressure depressurization unit body (1) depressurized air outlet union (4) to the circulating water return pipe (7) attached to the circulating water inlet pipe (6) water pipe inlet union (5) And the connecting tube (8), the negative pressure in the circulating water return pipe (7) during the operation of the circulating water pump (11) and the pressure in the atmospheric pressure reducing body (1) are made equal to the negative pressure. Atmospheric pressure that remains in the orifice (3) in the pressure reducing part main body (1) is sucked and passed through the case with negative pressure. At this time, the pressure is reduced by the expansion of the orifice (3). The

The decompressed atmosphere is sent from the atmospheric pressure reducing section main body to the atmosphere mixing section union (5) installed in the air mixing section water pipe (6) through the tube (8), and the decompressed atmosphere is circulated in the water pipe. It stays in a balloon state at the mouth of water and the mixing part, and is sucked by the negative pressure of the circulating water, and is shredded to become small bubbles close to free oxygen and intermittently carried.

Small air bubbles in a state close to free oxygen are gently sent into the filter (13) together with new natural bacteria, and the filter medium (14) in the filter (13) serves as a buffer, and a circulating water pump ( 11) Some bubbles that do not damage the filter medium (14) supply the oxygen in a state close to free oxygen over time to the bacteria that propagate here and the new bacteria.

According to the present invention, as described above, the circulation pump (11) reduces the atmospheric pressure and sucks the atmospheric pressure, and the air is efficiently taken in without being damaged by air bubbles. Oxygen and natural carbon dioxide contained in 0.03% can be used and supplied, and the aquatic plants in the aquatic plants (17) contribute to the environment by not using artificial carbon dioxide in the aquarium (19) It is characterized by the fact that an energy-saving low-cost reductive filtration system tank (17) for denitrating nitric respiration can be realized by supplying abundant free oxygen to establish and use photosynthetic bacteria floating in the atmosphere. The atmospheric pressure reducing device (1).

In the middle of the circulating water return pipe (7) from the water tank (17) to the filter (13) on the filter (13) inlet side, an air mixed water pipe (6), an atmospheric pressure reducing part main body (1), and a tube (8 ), And in the middle of which the backflow prevention valve (10) and the cock (9) are attached, the atmospheric pressure reducing part main body (1) has an atmosphere treated with dust or the like by the strainer at the air intake part (2) inlet. Atmosphere having one atmospheric pressure with the orifice (3) built in the main body (1) of the atmospheric pressure reducing part is an atmospheric mixed water pipe installed in the middle of the circulating water return pipe (7) during operation of the circulating water pump (11). (6) and the atmospheric pressure reduction body (1) connected by the tube (8) are set to the same pressure as the negative pressure in the circulating water return pipe (7). The atmosphere stayed at the orifice (3) is negative. At this time, it is squeezed by the orifice (3) and swelled. It is reduced in action.

Test results using the above prototype (measured on the 104th day since the previous water change)
60cm water tank Water temperature 24 degrees pH 6 Ammonia 0mg / liter Nitrous acid 0mg / liter Carbon dioxide dissolved amount 20mg / liter This value is the optimal dissolved amount for growing aquatic plants and carbon dioxide contained in 0.03% in the atmosphere is taken The conventional artificial carbon dioxide gas has been forcibly added, but the maintenance cost of equipment is not required, but it is trace amount, but it can contribute to energy saving and environment. Nitrate residual concentration of 5 mg / liter or less is denitrified nitrate by photosynthetic bacteria The bottom of the bottom of the aquarium (19) maintains the best state in the aquarium (19) with respect to aquatic organisms in the aquarium (19) without reduction of water for a long time without reduction of water. It can be confirmed that bubbles larger and smaller than sand (16) are present, and this seems to be a function of photosynthetic bacteria with the property of using light energy when the lighting (18) time is long. Such as oxygen efficiency atmospheric vacuum method of the present invention contained in the atmosphere takes in air well, it is an indication that can effectively use.

When a prototype is installed in a 120 centimeter tank, the nitrate dissolved amount is 20 mg / liter. After one month, the nitrate dissolved amount is reduced to 10 mg / liter, and after two months the nitrate dissolved amount is reduced to 5 mg / liter. The nitrate dissolved amount is as high as 50 mg / liter, and after one month, 20 mg / liter, and after two months, the nitrate dissolved amount is reduced to 5 mg / liter.

Although the embodiments and examples of the present invention have been described above, the scope of the present invention is not limited to this. For example, in a large water tank, the capacity of the atmospheric pressure reduction main body (1) and the air mixed water pipe (6) The mounting position relationship and the like are appropriately selected according to the situation.

INDUSTRIAL APPLICABILITY The present invention can be used in the field of appreciating fish and aquatic organisms such as fish, and in the field of manufacturing and selling useful filters and growing articles.

1 is a schematic cross-sectional view of an atmospheric pressure reducing unit main body according to a first embodiment of the present invention. It is sectional drawing of an air mixing water pipe outline. It is systematic diagrams, such as circulating water.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Atmospheric pressure decompression part main body 2 Atmospheric intake part 3 Orifice 4 Decompression atmosphere outlet union 5 Water pipe inlet union 6 Air mixing part water pipe 7 Circulating water return pipe 8 Connecting tube 9 of atmospheric mixing part water passage and atmospheric pressure reduction body 9 Cock 10 Backflow prevention valve 11 Circulating water pump 12 Circulating water feed pipe 13 Filter 14 Filter medium 15 Circulating water suction port 16 Water tank bottom sand 17 Water tank 18 Aquatic aquatic plant growth and viewing lighting 19 Water tank 20 Circulating water outlet
21 Circulating water flow direction

The present invention is toxic as a metabolite at the end of biological oxidative filtration, in which physical filtration of aquatic biological aquatic plants, fish and other waste products, and biological oxidative filtration with bacteria from nature are generally performed to maintain water quality in the ornamental aquarium. becomes low nitrate, this nitrate as high as large quantity storage 30 mg / l, causes inhibition of inhibitory and immune system adversely affects growth aquatic organisms, diluting the nitrate concentration by water changes because of the risk in ornamental aquariums Therefore, the present invention relates to a method and an apparatus for reducing the amount of accumulated nitrate discharged out of the water tank.

Conventionally, in maintaining the water quality in an ornamental aquarium, physical filtration of waste products such as food residue, fish excrement aquatic plants, and biological filtration of biooxidative degradation chains are performed.

What is commonly referred to as the filtration of aquarium waste by the biological in biological oxidative decomposition chain filtered by oxidation and nitrification bacteria, the emissions of manure to the generation of harmful ammonia by putrefactive bacteria aerobic bacteria, ammonia by aerobic bacteria This is also to a certain nitrite harmful, the final metabolite of the oxidation filtration nitrite by aerobic bacteria, to produce a harmless nitrates from.

This beneficial bacteria is mainly heterotrophic bacteria in Nitrosomonas etc., the molecular free oxygen growth speed in bacteria decompose organic waste food and fish into the water tank from airborne oxygen melted into the water tank quickly in minutes Ammonia, which produces ammonia using, is harmful to fish and the like.

Ammonia oxidation bacteria to ammonia and nutrients, nitro genus is oxygen breathing oxygen autotrophic bacteria as an oxidizing agent, even 3 days according nitrite from the growth speed is slow 2 days to decompose the ammonia to produce a nitrite Toxic.

Nitrite-chlorinated bacteria that use nitrite as a nutrient are bacteria that break down with oxynitrite's bound oxygen to produce harmless nitrates, which are slow to grow and take 2 to 3 days. Nitrate produced as a final metabolite in Japan is harmless, but a large amount of nitrate accumulates, and when it reaches 30 mg / liter, it has a harmful effect on aquatic organisms that inhibit growth and immunity. Every week, it is discharged outside the tank for dilution by changing water by about one third of the tank.

Nitrosomonas genus and Nitrobacter genus are representative of the above aerobic bacteria, these bacteria acquire free oxygen (oxygen molecules floating in the water) and nutrient organic matter dissolved in the water tank, acquire energy and maintain life, Create cellular material for growth.

All aerobic bacteria incorporate free oxygen (oxygen molecules floating in the water). In order to promote the biofiltration of the biooxidative degradation chain, it is necessary to grow and activate the bacteria, and for this reason, the bacteria propagate. Oxygen replenishment is important in the state of microbubbles that are close to free oxygen mainly in the filter and water tank. For decomposition of organic matter , oxygen is not used for nitric acid but for aerobic nitrification reaction. Use .

Denitrifying bacteria that have other functions on the bacteria mentioned above, facultative anaerobic bacteria, oxygen breathing under oxygen-rich conditions, nitrous acid or nitrate breathing in anoxic areas, nitrate to nitrite and nitrogen It is being pursued for this dream system called facultative anaerobic reductive filtration in the aquarium where it is reduced and released into the air.

In the aquarium, the above-mentioned low-toxic nitrate is reduced to nitrogen and detoxified, so it is not possible to change the water to zero, but a fairly stable aquarium system is being sought. Anaerobic reductive filtration is a method using biodegradable plastic denibole made from expensive 3-hydroxybutyric acid for carbon assimilation, which is an anaerobic layer that propagates anaerobic bacteria and is used as an anaerobic bait. It is divided into a method of periodically circulating anaerobic water using a device for removing oxygen, and research has been conducted with a great deal of time and waste.

The following Patent Documents 1 and 2 and Non-Patent Documents 1 to 8 can be cited as known techniques related to the present invention.
Patent Publication 2005-144383 Patent Publication 2005-223395 URLhttp: //www.civil.kumamoto-u.ac.jp/suishitu/paper/hydrogen/photosynthesis.htmBasics of accumulation and acclimatization of photosynthetic bacteria that produce hydrogen using organic acids as a carbon source URL http://jp.wikipedia.org/wiki/Photosynthesis Source: Free Encyclopedia Wikipedia URL http://www.eonet.ne.jp/again/2006/aqua-kiso/datsuchiso1.htm Filtration Denitrification (reduction) Filtration (1) What is denitrification? Pages 1 to 3 URL http://www.eonet.ne.jp/again/2006/aqua-kiso/roka2.htm Basics of Filtration 16. Basics of Filtration (2) 3 Biological Filtration Pages 1 to 3 URL http://www.mars.dti.ne.jp/gec/denit.html Anaerobic Filtration FAQ Pages 1 to 20 URLhttp: //www.cwaquatech.com/cwaquatech-041.htmNight rate filter top URLhttp: //www.eheim.jp “Aheim General Catalog” 19th (Features of Aheim Wet and Dry 2229) "Aheim Wet and Dry Filter 2229 Instruction Manual" Imported and Released by Aheim Japan Co., Ltd. Pages 7 to 10

As described above, the present invention performs nitrogen reduction filtration in which nitrate, which is the final metabolite of biological oxidation chain filtration by oxidizing bacteria, is released into nitrogen gas by reducing bacteria to maintain the water quality of the ornamental water tank, and it is supplied in a stable state constantly oxygen bacteria breeding in the water tank, as a method conventionally, a method for drawn directly air utilizing a negative pressure suction hydronic have been published, the pump due to the air bubbles there is a problem of noise of the air cult occurs, the solution utilizing the air in nature in view of the problems of carbon dioxide necessary for photosynthesis of aquatic plants, breeding of facultative anaerobic bacteria in said water tank, proliferative activity The aim is to realize an energy-saving, low-cost facultative anaerobic denitrification nitrate respirator tank that is established in an environment that meets the conditions for

Reducing BOX using 3-hydroxybutyric acid, etc. is sold for the problem of anaerobic removal of oxygen in the water to create an anoxic environment (flow rate adjustment, maintenance), supply of carbon source as anaerobic nutrients However , there is a problem of quantity and spillage outside the anaerobic region, and there is an anoxic region and an anoxic region, and catabolic sulfide reduction occurs in the oxygen-free region. Hydrogen sulfide is generated. Hydrogen sulfide is a very dangerous and extremely toxic gas, and hydrogen sulfide generation has been reported in systems using denitrogen bait denitrogen, siporax (material is the same as Denibol), etc. .

In addition, the system seems to be caused by Pseudomonas bacteria, and once nitrate is returned to nitrite and then reduced to nitrogen, rapid nitrite (poisonous) feedback will occur if it is not successful, and it will adversely affect aquatic organisms. The biggest problem is that it costs money in addition to being difficult.

An apparatus as a method for taking oxygen into a water tank disclosed as a viewing water tank clean system (see Patent Document 1) From the description of the apparatus described in Japanese Patent Publication No. 2005-143484, circulating water mixed with bubbles is directly sucked into a pump. However, pumping the circulating water mixed with air bubbles causes the cavitation phenomenon (the drive, swirl phenomenon, vibration and noise generated in the hydraulic machine, which causes the trouble of the wing and the pump. ), The atmosphere has a pressure of 1 atm , and sucking the air into the negative pressure state in the circulating water return pipe during operation entails energetic air bubbles, and the entrained air bubbles cause the circulating water pump to Causes damage by causing the cavitation phenomenon .

There is a great possibility that problems will occur if the pump is used continuously for a long time, and it is estimated from the drawing that the air bubbles taken in are blown upward and the filtration device is installed at the bottom of the water tank, and the bubbles do not convect. One-fifth of the volume of oxygen contained in the air bubbles rises directly, oxygen supply is inefficient for bacteria that need oxygen in the bottom filter, and the oxygen supply is normal This method is the same as aeration performed by an air pump and damages the pump. This method is ineffective. The method of taking in air by using the negative pressure on the suction side of the pump is already used in large apparatuses.

In the general, especially aquatic plant aquarium at normal viewing aquarium, the foster growth of aquatic plants is carbon dioxide important to test the light photosynthesis, supplied for use artificial carbon dioxide to the conventional water tank Forcibly added, and the surplus is released to the outside air, which is a carbon dioxide gas that has recently been a concern for global warming as a greenhouse gas. It leads to destruction.

Artificial carbon dioxide is forcibly added to daytime aquatic plants and air is pumped at night, and the aeration method using an electric air pump such as a discus enthusiast or the like causes air bubbles to be sent too powerfully , resulting in large bubbles reaching the water surface quickly. water and contacting time is unable state or the like close to (oxygen molecules drifting in water) free oxygen into shorter water tank, the bacteria that breed in the filter medium in the filter of the state close to always gently free oxygen in bubbles of minute Supply is necessary, but the supply method using the above-mentioned constant electric air pump has a poor dissolution rate, requires too much power cost, and is inefficient due to poor utilization efficiency of the atmosphere. Natural oxygen is one-fifth of the volume of the atmosphere. The latter four fifths are nitrogen, 0.03% carbon dioxide and other gases.

The denitrification Nitrate respiration reducing filtration, the oxygen-photosynthesis bacteria in the bacteria floating in the air, capture utilized in the water tank to supply the atmosphere air as a medium, the bacteria in the microorganisms breeding at the border or the like Some photosynthetic bacteria prefer to have water with a lot of organic matter. They are autotrophic organisms. Basically, paddy fields and swamps use light as energy, and if there is eutrophied water, they are suitable for the growth of photosynthetic bacteria. Because it is a facultative anaerobe, it is a relatively fast bacterium that grows in an environment with free oxygen in water in the aerobic region and in an environment with nitrate bound oxygen as a substrate in the anaerobic region.

Light is the energy, easy to culture, fungus is safe and fast growth rate Metabolite in the decomposition of organic matter is nutritious and feed, environmental conditions in ornamental aquarium are suitable for propagation and growth from organic matter to ammonia By using this characteristic, which acts on nitrogen from nitrous acid and nitrate, it plays an important role in the natural ecosystem in the aquarium, and it is easy to establish and propagate in the aquarium and can be used for denitrification reduction filtration.

Since some bacteria also perform nitrate respiration under anaerobic dark conditions, denitrification can be expected , and anaerobic bacteria placed in an anaerobic environment as breathable anaerobic bacteria are the final reward for biooxidative chain filtration Reductive filtration can be expected by performing denitrification nitrate respiration using the remaining bound oxygen of nitrate as its substrate, and a denitrification nitrate respiration reduction filtration water tank becomes possible.
Because of the characteristics of photosynthetic bacteria as facultative anaerobes, it can be used in ornamental aquariums as a growth environment. It is a kind of aquatic microorganisms and is eutrophied in the aquatic environment (in the viewing aquarium). Shallow water depth through which light energy (lighting for aquatic aquatic aquatic life and appreciation) can be propagated if there is leftover food or eutrophied water with the excrement from the living body dissolved, some kind of nutrition Anaerobic layer containing the source (in the filter, in the bottom sand) As the place where photosynthetic bacteria as facultative anaerobes propagate, water is stagnant in the back of the porous filter medium in the filter and in the bottom sand. location can be cited as, water tank in aquarium, but but the most well equipped as habitat for photosynthetic bacteria, the supply and nitrate oxygen by water recombination frequency relationship to anaerobic bacteria, photosynthetic fine in aquarium field previously Could not of the fixing breeding culture.

In the promotion of denitrification nitrate respiration reduction filtration by facultative anaerobes, oxygen greatly affects as an oxidant. As a result, nitrifying bacteria use oxygen as an oxidant when decomposing organic matter in anaerobic environment. reduction of nitrate back into nitrogen nitrate (nitric breathing) final metabolite of biooxidation chain filtration requires free oxygen to the biological oxidation chain filtration activity is required for the anaerobic respiration of facultative anaerobic bacteria, the nitrate respiration in nitrates is processed into the water tank outside becomes bubbles are reduced to nitrogen, also substrates for anaerobic bacteria is generated, the supply of free oxygen to the activity of nitrifying bacteria there important, and anaerobic to aerobic bacteria growth culture photosynthetic bacteria Contradictingly, the presence of oxygen is greatly related to the balance in the aquarium.

For this purpose, it is necessary and important to supply oxygen etc. from the inlet of the filter to the bacteria that propagate on the porous filter medium in the filter and the bacteria in the water tank to make them close to free oxygen (oxygen molecules floating in the water) . The supply equipment and method were problematic and impossible .

The conventional oxygen uptake method is a method of adjusting the flow rate by throttling with a needle valve . Bubbles are carried in a size that cannot be adjusted to a state close to oxygen molecules drifting in water, and bubbles accumulated and accumulated in the pump suction port Cavitation phenomenon abnormal sound that seems to be due to being sucked in at a stroke is occurring .
The present invention solves the above problems .

A device that uses the negative pressure on the circulating water suction side during operation of the circulating water pump to reduce the atmospheric pressure in order to take in the atmosphere . The device includes an air inlet valve (3) and an outlet valve / backflow prevention valve (4). Two valves are provided and two-stage decompression is performed . The outlet valve (4) is used for feedback to reduce the pressure by two stages . An atmospheric pressure reducing device configured as described above.

The atmospheric pressure reducing device of the present invention reduces the pressure by the resistance of the air inlet valve (3) and the outlet valve (4) by sucking the air using the negative pressure on the circulating water suction side during the operation of the circulating water pump. intermittently can be in the bubble of the minute, and be a state close to the oxygen molecules floating in free-oxygen water, it can be input intermittently feed, without damage to the pump due to the air bubbles, efficiently oxygen such as filtration The outlet valve (4) that can be fed into the vessel and water tank also serves as a backflow prevention valve when the pump is stopped .

Oxygen and photosynthetic bacteria bacteria such supplies from the atmosphere contained in the atmosphere of the natural world, as the arrangement of the filter (13) circulating the water suction pipe (7) It is important filter for incoming feed from (13) There is a filter (13) between the aquarium (17) and the circulating water pump (11), and the suction negative pressure in the inlet pipe of the filter (13) is sucked into the atmosphere. Incorporating the atmosphere directly at a pressure causes damage to the pump (11). The present invention is a device for reducing the pressure of the atmosphere, and a device for gently introducing the atmosphere without damaging the pump (11). is there.

The state of oxygen close to the direct free oxygen to bacteria breeding in the filter porous filter media (14) is filled the filter medium (14), also bacteria bacteria or the like sucked into the new in the filter medium (14) It adheres or passes through the circulating water pump (11) and is sent into the water tank (19) through the circulating water feed pipe (12) .

Due to the characteristics of the photosynthetic bacteria, the food is left as food for growth and the eutrophication tank (19) in which the excrement from the living body is dissolved. There is a filter (13) and bottom sand (16) as an anaerobic layer, and the inside of the water tank with this condition is most suitable for colonization and growth of photosynthetic bacteria. The atmospheric pressure reducing device main body (1) of the present invention is suitable for this environment. And the air mixing part water pipe (6) is attached to the circulating water return pipe (7), and the air is taken in abundantly by oxygen and photosynthetic bacteria. Realization of a water tank that reduces nitrate to nitrogen is extremely possible, and the water quality in the water tank can be maintained.

The fact that photosynthetic bacteria could not be established, cultivated and cultured in the aquarium was a problem because of the frequent change of water due to the introduction of bacteria floating in the natural world along with supplementation of oxygen and the remaining nitrate. There was . By reducing the number of water changes, photosynthetic bacteria as facultative anaerobes can be established by introducing the photosynthetic bacteria into the aquarium (19) together with oxygen brought into a state close to free oxygen from the atmosphere. . By supplying oxygen, the problem of residual nitrate can be solved by colonization of photosynthetic bacteria without long-term water change .

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 to 3 relate to an embodiment of the present invention, FIG. 1 is a schematic cross-sectional view of an atmospheric pressure reducing unit main body, FIG. 2 is a schematic cross-sectional view of an air mixing unit water conduit, and FIG. It is a system diagram.

The material of the atmospheric inlet valve (3) and outlet valve (4) according to claim 1, which is a key part of the present invention, is molded into a cap shape with a synthetic resin having elasticity, and the valve of the atmospheric flow path is particularly elastic. This is a valve that uses a sexual phenomenon (an object whose shape or volume has been changed by an external force, and that when the force is removed, it returns to its original state). The outlet valve (4) is stronger than the atmospheric inlet valve and stops when stopped. Also functions as a backflow prevention valve .

As shown in FIGS. 1 to 3, as an apparatus for taking in the atmosphere into the filter (13) and the water tank (19) , an atmospheric inlet valve is provided at the tip of the atmospheric intake part (2) in the atmospheric pressure reducing body (1). (3) is incorporated, and the atmospheric mixing part water pipe (6) attached to the return pipe (7) of the circulating water from the connecting tube connection part (10) of the outlet valve cover (23) of the atmospheric pressure reducing part main body (1 ). Circulating water return during operation of circulating water pump (11), connected by water pipe inlet union connection (5) and connecting tube (8) (with a length for backflow when negative pressure of circulating water changes ) The negative pressure in the pipe (7) and the pressure in the outlet valve cover (23) of the atmospheric pressure reducing part main body (1) are made equal to the negative pressure, and the outlet valve (4) attached in the outlet valve cover (23) is installed. The atmospheric pressure of 1 atm that remains in the atmospheric inlet valve (3) with negative pressure through the To suction passage, this time is reduced to atmospheric throttled by the resistance of the air inlet valve to the further aperture intermittently two stages by the resistance of the outlet valve (4), the bubble closer to intermittently free oxygen stop to this two-step It is characterized by that .

The throttle effect is such that the decompressed atmosphere is attached so that the inlet union (5) of the air mixing part water pipe (6) according to claim 3 is slightly inclined in the direction of the circulating water flow and the tip is pierced into the pipe. The depressurized air sent from the main body of the atmospheric pressure depressurization unit to the inlet union (5) through the tube (8) is made through water. At the tip of the inlet union (5), the circulated water in the pipe stays in a balloon state and is sucked into the negative pressure of the circulated water, and is chopped off into small bubbles that are intermittently carried to free oxygen. .

Small air bubbles in a state close to free oxygen are gently sent into the filter (13) together with new natural bacteria, and the filter medium (14) in the filter (13) serves as a buffer, and a circulating water pump ( 11) Some bubbles that do not damage the filter medium (14) supply the oxygen in a state close to free oxygen over time to the bacteria that propagate here and the new bacteria.

According to the present invention, as described above, the circulating water pump (11) reduces the atmospheric pressure to be sucked in, and the air is efficiently taken in without being damaged by air bubbles. It is possible to use and supply 0.03% natural carbon dioxide together with the oxygen of the aquatic plant, but the aquatic plants in the aquatic aquarium tank (17) do not use artificial carbon dioxide. In order to contribute to the establishment and use of photosynthetic bacteria floating in the atmosphere (19) in the aquarium (19), an abundant supply of free oxygen is provided and culture growth makes it possible to reduce the energy-saving and low-cost denitrification nitric respiration reduced filtration An atmospheric pressure reducing device (1) characterized in that it can be realized.

In the middle of the circulating water return pipe (7) from the water tank (17) to the filter (13) on the filter (13) inlet side, an air mixed water pipe (6), an atmospheric pressure reducing part main body (1), and a tube (8 The cock (9) is attached in the middle of the tube, and the atmospheric pressure reducing part main body (1) has atmospheric pressure reduced when the atmosphere treated with dust at the filter of the inlet of the atmospheric intake part (2) The atmospheric air having one atmospheric pressure by the atmospheric inlet valve (3) and the outlet valve (4) built in the main body (1) is in the middle of the circulating water return pipe (7) during operation of the circulating water pump (11). Connected to the atmospheric water-flow pipe (6) and the tube (8), and the inside of the outlet valve cover (23) of the atmospheric pressure reducing body (1) is the same pressure as the negative pressure in the circulating water return pipe (7). The air inlet valve (3) stays in the atmospheric pressure reducing body (1) through the outlet valve (4). Atmospheric air is sucked and passed with a pressure difference from the negative pressure. At this time, it is throttled and depressurized by the resistance of the atmospheric inlet valve (3), and further depressurized in two stages by the resistance of the outlet valve (4). In (6), it becomes a fine bubble and is carried intermittently .

Test results using the above prototype (measured on the 104th day since the previous water change)
60cm tank Water temperature 24 degrees pH 6 Ammonia 0mg / liter Nitrous acid 0mg / liter Carbon dioxide dissolved amount 20mg / liter This value is the optimum dissolved amount for growing aquatic plants, and the carbon dioxide contained in the atmosphere is 0.03%. The conventional artificial carbon dioxide gas has been forcibly added, but the maintenance cost of equipment is not required, and the amount of nitrate remaining less than 2.5 mg / liter, which can contribute to energy saving and the environment, is eliminated by photosynthetic bacteria. The bottom of the aquarium (19) is maintained in the best state in the aquarium (19) against aquatic organisms in the aquarium (19) without long-term water change, which is reduced by nitrite respiration. It can be confirmed that bubbles larger and smaller than the bottom sand (16) of the seafloor are present. This seems to be a function of photosynthetic bacteria that take advantage of light energy when the lighting (18) time is long. This shows that the atmospheric pressure reduction method of the present invention takes in the atmosphere and contains oxygen in the atmosphere efficiently and effectively.

When a prototype is installed in a 120 centimeter tank, the nitrate dissolved amount is 20 mg / liter. After one month, the nitrate dissolved amount is reduced to 10 mg / liter, and after two months the nitrate dissolved amount is reduced to 5 mg / liter. The nitrate dissolved amount is as high as 50 mg / liter, and after one month, 20 mg / liter, and after two months, the nitrate dissolved amount is reduced to 5 mg / liter.

Although the embodiments and examples of the present invention have been described above, the scope of the present invention is not limited to this. For example, in a large water tank, the capacity of the atmospheric pressure reduction main body (1) and the air mixed water pipe (6) The mounting position relationship and the like are appropriately selected according to the situation.

INDUSTRIAL APPLICABILITY The present invention can be used in the field of appreciating fish and aquatic organisms such as fish, and in the field of manufacturing and selling useful filters and growing articles.

1 is a schematic cross-sectional view of an atmospheric pressure reducing unit main body according to a first embodiment of the present invention. It is sectional drawing of an air mixing water pipe outline . It is systematic diagrams, such as circulating water.

Explanation of symbols

1 Atmospheric pressure reducing part 2 Air intake part (filter)
3 Atmospheric inlet valve 4 Outlet valve / backflow prevention valve 5 Water pipe inlet union 6 Air mixing part water pipe 7 Circulating water return pipe 8 Connecting tube 9 Cock 10 Connecting tube connecting part 11 Circulating water pump 12 Circulating water feed pipe 13 Filter 14 Filter medium 15 Circulating water inlet 16 Water tank bottom sand 17 Water tank 18 Growth and viewing lighting 19 Water tank 20 Circulating water outlet 21 Adsorption plate 22 Fluid flow direction 23 Exit valve cover

The present invention relates to an apparatus for reducing the frequency of water change and the accumulated amount of nitrate as a final metabolite of biooxidative degradation chain filtration in maintaining water quality in an ornamental aquarium.

The so-called aquarium filtration generally includes biological oxidation, biooxidative degradation chain filtration and phytofiltration by nitrifying bacteria.

Conventionally, in order to maintain water quality in ornamental aquariums, physical filtration of waste products such as food residue, fish excrement and aquatic plants, and biological filtration of biological oxidative degradation chains are generally performed. At the end of oxidative filtration, it becomes a low-toxic nitrate as a metabolite, and when this nitrate also accumulates in a large amount reaches 30 mg / liter, it inhibits growth that adversely affects aquatic organisms and inhibits the immune system. It is discharged out of the water tank to periodically dilute the nitrate concentration by changing the water.

This beneficial bacterium is a genus Nitrosomonas and is mainly an organic vegetative bacterium that breaks down organic matter in food and fish excretion from the natural air into the aquarium. Ammonia, which generates ammonia using oxygen, is harmful to aquatic organisms.

When ammonia is present in the aquarium, it is an ammonia-oxidizing bacterium that uses Ammonia as a nutrient, and the genus Nitrococcus is an autotrophic bacterium that breathes oxygen using oxygen as an oxidant to decompose ammonia and produce nitrite. Day-consuming nitrite is also toxic.

If the nitrite is produced and present in the aquarium, the nitrite bacterium that uses nitrite as a nutrient is a bacterium that decomposes with the bound oxygen of nitrite to produce harmless nitrate, which also has a slow growth speed and takes 2 to 3 days. However, harmless nitrate is produced and remains as a final metabolite in the biofiltration of the above biooxidative degradation chain.

The nitrates mentioned above are harmless, but a large amount of nitrate accumulates, and if it reaches 30 mg / liter, it is dangerous to cause growth inhibition or immunity to aquatic organisms, so it is dangerous and periodically about one third of water in the tank. It is discharged artificially out of the water tank for dilution.

Nitrosomonas genus and Nitrobacter genus are representative of the above aerobic bacteria, these bacteria acquire free oxygen (oxygen molecules floating in the water) and nutrient organic matter dissolved in the water tank, acquire energy and maintain life, Create cellular material for growth.

All aerobic bacteria incorporate free oxygen (oxygen molecules floating in the water). In order to promote the biofiltration of the biooxidative degradation chain, it is necessary to grow and activate the bacteria, and for this reason, the bacteria propagate. As a place, oxygen supply is important mainly in the filter and in the water tank in a very small bubble state that is close to free oxygen. To decompose organic matter, not nitric acid but aerobic nitrification reaction Oxygen is needed.

It is said to be denitrifying bacteria and facultative anaerobic bacteria that have other functions on the above-mentioned bacteria, and breathes oxygen under conditions where oxygen is abundant. This dream system is being pursued by breeding and growing anaerobic bacteria called reductive filtration through facultative anaerobes in the aquarium where it is returned to nitrogen and released into the air.

In the aquarium, the above-mentioned low-toxic nitrate is reduced to nitrogen, and the accumulated amount of nitrate is reduced to make it harmless, so water change is not zero, but a fairly stable aquarium system is required. Currently, in the aquarium world, anaerobic reductive filtration is made from expensive 3-hydroxybutyric acid for carbon assimilation that blocks oxygen for breeding anaerobic bacteria and provides an anaerobic layer to feed anaerobic bacteria. It is divided into a method that uses biodegradable plastic denibole and a method that circulates anaerobic water periodically using an oxygen removal device and propagates anaerobic bacteria.

Reducing BOX using 3-hydroxybutyric acid etc. is sold for the problem of anaerobic removal of oxygen in the water to create an anoxic environment (flow rate adjustment, maintenance), supply of carbon source as anaerobic nutrients However, there are problems such as quantity and outflow to areas other than anaerobic areas, and there are anoxic and anoxic areas, and catabolic sulfide reduction occurs in anoxic areas. Hydrogen sulfide is generated. Hydrogen sulfide is a very dangerous and extremely toxic gas, and hydrogen sulfide generation has been reported in systems using denitrogen bait denitrogen, siporax (material is the same as Denibol), etc. .

In addition, the system seems to be caused by Pseudomonas bacteria, and once nitrate is returned to nitrite and then reduced to nitrogen, rapid nitrite (poisonous) feedback will occur if it is not successful, and it will adversely affect aquatic organisms. The biggest problem is that it costs money in addition to being difficult.

Another problem is that in the aquatic aquarium, carbon dioxide is important for the growth and growth of aquatic plants, as well as the light of the photosynthetic action. Conventionally, a supply facility has been installed to use artificial carbon dioxide in the aquarium. Carbon dioxide gas, which is forced to be added and released into the open air, and is a concern for global warming as a greenhouse gas in recent years, is extremely tiny, and it is uneconomical due to environmental problems and gas purchase costs, equipment maintenance costs, etc. It is.

In the natural atmosphere, one-fifth of the volume is oxygen, and the next four-fifths are nitrogen, 0.03% carbon dioxide and other gases, and plants generally have enough carbon dioxide in the atmosphere. Growing up.

The following patent is disclosed as an apparatus for supplying oxygen to the aerobic bacteria described above, but has the following problems.

Conventionally, a method for sucking air directly using a circulating water pump suction negative pressure disclosed in Japanese Patent Publication No. 2005-14383 has been disclosed. However, there is a problem that air bubbles generate noise in the pump due to bubbles and damage the pump.

An apparatus as a method for taking oxygen into a water tank disclosed as a viewing water tank clean system (refer to Patent Document 1) From the description of the apparatus described in Japanese Patent Publication No. 2005-14383, the pump directly sucks circulating water mixed with bubbles. However, it is the cavitation phenomenon that causes the pump to suck the circulating water mixed with air bubbles, which is the most troublesome for the pump (drive, swirl phenomenon, cause vibration and noise in hydraulic machines and cause damage to the wings and pump) The atmosphere has a pressure of 1 atm, and sucking the atmosphere into the negative pressure state in the circulating water return pipe during operation entails energetic air bubbles, and the entrained air bubbles cause the above-mentioned to the circulating water pump. There is a problem of causing damage by causing a cavitation phenomenon.

There is a great possibility that problems will occur if the pump is used continuously for a long time, and it is estimated from the drawing that the air bubbles taken in are blown upward and the filtration device is installed at the bottom of the water tank, and the bubbles do not convect. One-fifth of the volume of oxygen contained in the air bubbles rises directly, oxygen supply is inefficient for bacteria that need oxygen in the bottom filter, and the oxygen supply is normal There is a disadvantage that this method is not effective, just as it causes damage to the pump, just like aeration performed with an air pump. In addition, the method of taking in air using the negative pressure on the suction side of the pump is already used in large equipment Has been.

In the method of the conventional patent publication 2005-223395, the pressure is reduced by using an orifice. The hole diameter of this orifice is controlled by a pin hole. The orifice hole is a pin hole, so there is a lot of clogging due to dust. Because of the method of adjusting the flow rate using an expensive needle valve, it is expensive in terms of cost, such as needle valve production, and it seems that it will not be unbearably adjusted. A backflow prevention valve is incorporated in the circulating water and air mixing part of the pipe. In this installed state, the backflow prevention valve is in direct contact with water, and the valve is in close contact with water, causing the problem of inability to vent, always checking If the needle valve is opened larger and the flow rate is increased, the amount of air bubbles passing through the filter increases, and the accumulated air bubbles that have accumulated in the pump suction port are sucked in at once. There is a problem that cavitation phenomenon abnormal sounds you think that because it is going on.

Patent Publication 2005-144383

Patent Publication 2005-223395

The problem to be solved is to use the natural atmosphere, which is the cheapest and most effective for maintaining the water quality of the ornamental water tank, using the negative pressure in the circulating water return pipe during operation of the circulating water pump with external filter. In order to realize an energy-saving, low-cost denitrification nitrate breathing reduction water tank, circulating water pumps are used to supply atmospheric oxygen to bacteria that take in the air inside the external filter and the water tank and propagate here. The cavitation phenomenon, which is a hindrance, is controlled to a minimum, and the circulating water pump is not damaged.

The present invention is an apparatus for reducing the atmospheric pressure in order to minimize the occurrence of cavitation phenomenon in order to minimize the occurrence of cavitation due to the intake negative pressure of a circulating water pump with an external filter and the use of the atmosphere. An inlet valve and an outlet valve are installed in combination, and the valve material is made of elastic synthetic resin and uses the elasticity of the material. The atmospheric pressure reducing device characterized in that the atmospheric pressure comprising the combination of these valves is reduced in two stages.

Atmospheric pressure from the inlet valve of the atmospheric pressure reducing device main body, which is connected to the outlet connection portion of the atmospheric pressure reducing device combined with the valve and the water pipe inlet union of the circulating water return tube to suck the inside of the device with negative pressure in the circulating water return tube. The pressure is reduced by this resistance by allowing the atmosphere to pass through the installed valve, the pressure is reduced by one stage at the inlet valve of the atmospheric pressure reducing device, the pressure is reduced by one stage, the atmosphere is sucked into the outlet valve, and the resistance of the outlet valve is further reduced to the second stage. The main feature is that the pressure is reduced, and the pressure is passed through valves installed at the inlet and outlet, and the pressure is reduced in two stages.

The effect of the outlet valve is the second stage pressure reduction action, where the atmosphere is in a state where there is no pressure, and is sucked in and fed into the atmosphere mixing section water pipe with negative pressure, and the balloon is inflated by suction in the atmosphere mixing section It stays in the shape and stays intermittently from its tip and is transported as small bubbles that do not damage the circulating water pump and act as a feedback effect.When the circulating water cycle stops, the outlet valve also acts as a backflow prevention valve There is an advantage of doing.

The atmospheric pressure reducing device of the present invention minimizes the cavitation phenomenon that occurs when the atmosphere is sucked and taken in using the negative pressure in the circulating water return pipe (7) during operation of the circulating water pump (11). By controlling the temperature, the air can be taken in without damaging the circulating water pump, so that photosynthetic bacteria floating in the air are mixed.

The photosynthetic bacteria use light as energy, the culture is easy, the fungus is safe and the growth rate is fast, and the metabolites in the decomposition of organic matter are nutritious and feed, the environmental conditions in the ornamental aquarium (19) breed Suitable for growth and plays a major role in the aquatic ecosystem (19) by utilizing this property of acting from organic matter to ammonia, nitrous acid, and nitrate to nitrogen.

It is easy to take photosynthetic bacteria into the aquarium (19) together with the atmosphere and allow them to propagate and colonize, and it can be used for denitrification-reduction filtration.

Photosynthetic bacteria can be expected to denitrify because some bacteria also perform nitrate respiration under anaerobic dark conditions. Anaerobic nitrifying bacteria placed in an anaerobic environment as photosynthetic bacteria facultative anaerobic nitrifying bacteria are biological oxidation chain filtration Denitrification nitrate respiration using the nitrate bound oxygen remaining as the final metabolite in the substrate as the substrate, nitrate is reduced to nitrogen and discharged to the outside of the water tank, and a denitrification reduction filtration water layer is possible Become

Because of the characteristics of photosynthetic bacteria as facultative anaerobic nitrifying bacteria, the aquarium (19) in the aquarium is the most suitable as a growth environment. By supplying oxygen and photosynthetic bacteria into the aquarium (19), the frequency of water change can be increased. It is reduced.

Oxygen significantly affects the promotion of denitrification nitrate respiratory reduction filtration by facultative anaerobic nitrifying bacteria. When organic substances are decomposed in anaerobic environments, nitrifying bacteria use oxygen as an oxidizing agent. Nitrate is reduced and returned to nitrogen (nitrate respiration), free oxygen is required for the activity of biological oxidation chain filtration, and the final metabolite of biological oxidation chain filtration is necessary for anaerobic respiration of facultative anaerobic nitrifying bacteria .

Nitrate is reduced to nitrogen by the nitrate respiration and is converted into bubbles and processed out of the water tank (17), and a substrate for anaerobic nitrifying bacteria is generated. It is important to supply free oxygen for the activity of anaerobic nitrifying bacteria. The anaerobic nitrifying growth culture is also contradictory to anaerobic, but the presence of oxygen is greatly related to the balance in the aquarium (19).

In order to take in the atmosphere, the atmospheric pressure is removed from the inlet of the filter (13) through the porous water in the filter (13) using the negative pressure in the circulating water return pipe (7) during operation of the circulating water pump (11). It is important to supply oxygen etc. that are close to free oxygen (oxygen molecules floating in water) to bacteria that propagate on the filter medium (14) and bacteria in the aquarium (17). At this time, cavitation is likely to occur. Most importantly, by reducing the atmospheric pressure in two stages in order to control the phenomenon to the minimum, it is possible to maintain sufficient water quality by introducing enough air into the filter and water tank without damaging the circulating water pump and by breeding activities such as bacteria. An atmospheric pressure reducing device that performs two-stage pressure reduction.

FIG. 1 is a schematic cross-sectional view of an atmospheric pressure decompression unit main body. FIG. 2 is a schematic cross-sectional view of an air-mixed water conduit. FIG. 3 is a system diagram of circulating water and the like.

Embodiments of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1 to FIG. 3, the present invention is a device for taking air into the filter (13) and the water tank (19) of FIG. 6).

The inlet valve (3) of the atmospheric pressure reducing body (1) is attached to the circulating water return pipe (7) by the first stage pressure reducing action and the outlet valve / backflow prevention valve (4) is the second stage pressure reducing action. It is important for efficiently introducing air bubbles into the water pipe (6) of the air mixing part by making the air bubbles into small bubbles efficiently, preventing cavitation phenomenon and damaging the circulating water pump (11). The outlet valve backflow prevention valve (4) serves as a backflow prevention valve when the circulating water cycle is stopped.

This pressure reducing action is a negative pressure in the atmospheric pressure reducing part main body (1) in FIG. 1 and in the circulating water return pipe (7) during operation of the circulating water pump (11) in FIG. ) Built-in atmospheric inlet valve (3), the pressure is reduced by one stage, and the first-stage reduced pressure is sucked and passed through by the negative pressure of the circulating water return, and the outlet valve and backflow prevention valve (4) is further reduced by two stages. Here, the atmosphere is in a state without pressure.

The atmosphere depressurized in two stages is sent by the tube (8) in FIG. 3 to the FIG. 2 water pipe inlet union (5) of the air mixing part water pipe (6) attached to the circulating water return pipe (7) in FIG. In the air mixing section water pipe (6), the air that has no pressure due to the negative pressure of the circulating water and the circulating water in the air mixing section at the tip of the water pipe inlet union (5) is sucked and stays in a balloon state. The air pipe inlet union (5) of the air mixing part water pipe (6) is intermittently sucked to negative pressure, cut into small bubbles and close to free oxygen, and is intermittently carried. The tip is attached in a state of being slightly inclined in the flow direction and pierced into the inside of the pipe, and the atmosphere in which the pressure has been lost is efficiently made into bubbles in a state close to free oxygen by increasing the throttle effect.

Small bubbles near free oxygen are gently sent into the filter (13) in FIG. 3 together with new bacteria in the air, and the filter medium (14) in the filter (13) acts as a buffer. Some of the air bubbles that do not damage the circulating water pump (11) are the filter medium (14), and take time for the bacteria that propagate here and new bacteria to supply oxygen in a state close to free oxygen.

By using the air efficiently, it is possible to use and supply 0.03% natural carbon dioxide together with oxygen in the air, and artificial carbon dioxide is used for the aquatic plants in the aquatic aquarium (17). By making use of photosynthetic bacteria floating in the atmosphere in the aquarium (19), the energy saving and low-cost reductive filtration water tank (17) can be realized. The water quality can be maintained without long-term replacement of the water in the aquarium (11).

Test results using the above prototype (measured on the 104th day since the previous water change)
60cm tank Water temperature 24 degrees pH 6 Ammonia 0mg / liter Nitrous acid 0mg / liter Nitrate residual concentration 2.5mg / liter Carbon dioxide dissolved amount 20mg / liter This value is the optimum dissolved amount for aquatic plants and is 0.03% in the atmosphere Contained carbon dioxide is incorporated, but artificial carbon dioxide gas has been forcibly added. However, the maintenance cost of facilities is not required, energy saving, and a small amount of nitrate residue that can contribute to the environment while being in minute amounts. What can be maintained below liters is reduced by denitrifying nitrate respiration by photosynthetic bacteria.

Bubbles larger and smaller than the bottom sand (16) in the bottom of the aquarium (19), maintaining the best condition in the aquarium (19) against aquatic organisms in the aquarium (19) without long-term water change Can be confirmed now.

This seems to be a function of photosynthetic bacteria having the property of using light energy when the lighting (18) time is long.

This shows that the atmospheric pressure reducing device of the present invention takes in the atmosphere and efficiently uses oxygen and the like contained in the atmosphere.

When a prototype is installed in a 120 centimeter tank, the nitrate dissolved amount is 20 mg / liter, after one month it is 10 mg / liter, and after two months the nitrate dissolved amount is reduced to 5 mg / liter. The nitrate-dissolved amount was as high as 50 mg / liter, and after one month, 20 mg / liter, and after two months, the nitrate-dissolved amount decreased to 5 mg / liter.

Although the embodiments and examples of the present invention have been described above, the scope of the present invention is not limited to this. For example, in a large water tank, the capacity of the atmospheric pressure reduction main body (1) and the air mixed water pipe (6) The mounting position relationship and the like are appropriately selected according to the situation.

INDUSTRIAL APPLICABILITY The present invention can be used in the field of appreciation of aquatic organisms such as fish and water tanks for business growth or in the field of manufacturing and selling useful filters and growing articles.
It is an aquarium enthusiast, and it is effective when used in an existing external filter, especially in an aquarium tank.

1 Atmospheric pressure reducing part 2 Air intake part (filter)
DESCRIPTION OF SYMBOLS 3 Atmospheric inlet valve 4 Outlet valve and backflow prevention valve 5 Water pipe inlet union 6 Air mixing part water pipe 7 Circulating water return pipe 8 Connecting tube 9 Cock 10 Connecting tube connection part 11 Circulating water pump 12 Circulating water feed pipe 13 Filter 14 Filter medium 15 Circulating water suction port 16 Bottom sand 17 in the water tank 18 Tank 18 Growth and viewing lighting 19 In the water tank 20 Circulating water outlet 21 Suction plate 22 Fluid flow direction 23 Outlet valve cover

The present invention relates to an apparatus for reducing the frequency of water change and the accumulated amount of nitrate as a final metabolite of biooxidative degradation chain filtration in maintaining water quality in an ornamental aquarium.

The so-called aquarium filtration generally includes biological oxidation, biooxidative degradation chain filtration and phytofiltration by nitrifying bacteria.

Conventionally, in order to maintain water quality in ornamental aquariums, physical filtration of waste products such as food residue, fish excrement and aquatic plants, and biological filtration of biological oxidative degradation chains are generally performed. At the end of oxidative filtration, it becomes a low-toxic nitrate as a metabolite, and when this nitrate also accumulates in a large amount reaches 30 mg / liter, it inhibits growth that adversely affects aquatic organisms and inhibits the immune system. It is discharged out of the water tank to periodically dilute the nitrate concentration by changing the water.

This beneficial bacterium is a genus Nitrosomonas and is mainly an organic vegetative bacterium that breaks down organic matter in food and fish excretion from the natural air into the aquarium. Ammonia, which generates ammonia using oxygen, is harmful to aquatic organisms.

When ammonia is present in the aquarium, it is an ammonia-oxidizing bacterium that uses Ammonia as a nutrient, and the genus Nitrococcus is an autotrophic bacterium that breathes oxygen using oxygen as an oxidant to decompose ammonia and produce nitrite. Day-consuming nitrite is also toxic.

If the nitrite is produced and present in the aquarium, the nitrite bacterium that uses nitrite as a nutrient is a bacterium that decomposes with the bound oxygen of nitrite to produce harmless nitrate, which also has a slow growth speed and takes 2 to 3 days. However, harmless nitrate is produced and remains as a final metabolite in the biofiltration of the above biooxidative degradation chain.

The nitrates mentioned above are harmless, but a large amount of nitrate accumulates, and if it reaches 30 mg / liter, it is dangerous to cause growth inhibition or immunity to aquatic organisms, so it is dangerous and periodically about one third of water in the tank. It is discharged artificially out of the water tank for dilution.

Nitrosomonas genus and Nitrobacter genus are representative of the above aerobic bacteria, these bacteria acquire free oxygen (oxygen molecules floating in the water) and nutrient organic matter dissolved in the water tank, acquire energy and maintain life, Create cellular material for growth.

All aerobic bacteria incorporate free oxygen (oxygen molecules floating in the water). In order to promote the biofiltration of the biooxidative degradation chain, it is necessary to grow and activate the bacteria, and for this reason, the bacteria propagate. As a place, oxygen supply is important mainly in the filter and in the water tank in a very small bubble state that is close to free oxygen. To decompose organic matter, not nitric acid but aerobic nitrification reaction Oxygen is needed.

It is said to be denitrifying bacteria and facultative anaerobic bacteria that have other functions on the above-mentioned bacteria, and breathes oxygen under conditions where oxygen is abundant. This dream system is being pursued by breeding and growing anaerobic bacteria called reductive filtration through facultative anaerobes in the aquarium where it is returned to nitrogen and released into the air.

In the aquarium, the above-mentioned low-toxic nitrate is reduced to nitrogen, and the accumulated amount of nitrate is reduced to make it harmless, so water change is not zero, but a fairly stable aquarium system is required. Currently, in the aquarium world, anaerobic reductive filtration is made from expensive 3-hydroxybutyric acid for carbon assimilation that blocks oxygen for breeding anaerobic bacteria and provides an anaerobic layer to feed anaerobic bacteria. It is divided into a method that uses biodegradable plastic denibole and a method that circulates anaerobic water periodically using an oxygen removal device and propagates anaerobic bacteria.

Reducing BOX using 3-hydroxybutyric acid etc. is sold for the problem of anaerobic removal of oxygen in the water to create an anoxic environment (flow rate adjustment, maintenance), supply of carbon source as anaerobic nutrients However, there are problems such as quantity and outflow to areas other than anaerobic areas, and there are anoxic and anoxic areas, and catabolic sulfide reduction occurs in anoxic areas. Hydrogen sulfide is generated. Hydrogen sulfide is a very dangerous and extremely toxic gas, and hydrogen sulfide generation has been reported in systems using denitrogen bait denitrogen, siporax (material is the same as Denibol), etc. .

In addition, the system seems to be caused by Pseudomonas bacteria, and once nitrate is returned to nitrite and then reduced to nitrogen, rapid nitrite (poisonous) feedback will occur if it is not successful, and it will adversely affect aquatic organisms. The biggest problem is that it costs money in addition to being difficult.

Another problem is that in the aquatic aquarium, carbon dioxide is important for the growth and growth of aquatic plants, as well as the light of the photosynthetic action. Conventionally, a supply facility has been installed to use artificial carbon dioxide in the aquarium. Carbon dioxide gas, which is forced to be added and released into the open air, and is a concern for global warming as a greenhouse gas in recent years, is extremely tiny, and it is uneconomical due to environmental problems and gas purchase costs, equipment maintenance costs, etc. It is.

In the natural atmosphere, one-fifth of the volume is oxygen, and the next four-fifths are nitrogen, 0.03% carbon dioxide and other gases, and plants generally have enough carbon dioxide in the atmosphere. Growing up.

The following patent is disclosed as an apparatus for supplying oxygen to the aerobic bacteria described above, but has the following problems.

Conventionally, a method for sucking air directly using a circulating water pump suction negative pressure disclosed in Japanese Patent Publication No. 2005-14383 has been disclosed. However, there is a problem that air bubbles generate noise in the pump due to bubbles and damage the pump.

An apparatus as a method for taking oxygen into a water tank disclosed as a viewing water tank clean system (refer to Patent Document 1) From the description of the apparatus described in Japanese Patent Publication No. 2005-14383, the pump directly sucks circulating water mixed with bubbles. However, it is the cavitation phenomenon that causes the pump to suck the circulating water mixed with air bubbles, which is the most troublesome for the pump (drive, swirl phenomenon, cause vibration and noise in hydraulic machines and cause damage to the wings and pump) The atmosphere has a pressure of 1 atm, and sucking the atmosphere into the negative pressure state in the circulating water return pipe during operation entails energetic air bubbles, and the entrained air bubbles cause the above-mentioned to the circulating water pump. There is a problem of causing damage by causing a cavitation phenomenon.

There is a great possibility that problems will occur if the pump is used continuously for a long period of time. As estimated from the drawing, air bubbles taken in are blown upward, and the filtration device is installed at the bottom of the water tank. One-fifth of the volume of oxygen contained in the water will rise directly, the efficiency of oxygen supply to bacteria that need oxygen in the bottom filter and propagate is poor, oxygen supply is a normal electric air pump There is a drawback that this method is not effective, just as it causes damage to the pump, as is the case with aeration performed in the above.In addition, the method of taking in air using the negative pressure on the suction side of the pump is already used in large devices ing.

In the method of the conventional patent publication 2006-42819 , since pressure is reduced using one orifice, the hole diameter of this orifice is controlled by a pinhole, but cannot be adjusted. There is a lot of clogging due to, and because it is a method of adjusting the flow rate using an expensive needle valve, it is expensive in terms of cost such as needle valve production, and it seems that it will not endure and it is unnecessary long material, Adjustment is difficult, and a backflow prevention valve is incorporated in the circulating water and air mixing part of the circulating water return pipe. In this installed state, the backflow prevention valve is in direct contact with water and the valve is in close contact with water, making it impossible to vent If the needle valve is opened larger and the flow rate is increased, the amount of air bubbles passing through the filter increases and it stays in the pump suction port. There is a problem that cavitation phenomenon abnormal sounds that are considered to be due to air bubbles product is sucked at once is happening.

Patent Publication 2005-144383

Patent Publication 2006-42819

The problem to be solved is to use the natural atmosphere, which is the cheapest and most effective for maintaining the water quality of the ornamental water tank, using the negative pressure in the circulating water return pipe during operation of the circulating water pump with external filter. In order to realize an energy-saving, low-cost denitrified nitrate respiration and reduction water tank, circulating water pumps are used in the method of constantly supplying atmospheric oxygen to bacteria that take air into the external filter and the water tank and propagate here The cavitation phenomenon that hinders the generation of water is controlled to a minimum, and the atmosphere is used without damaging the circulating water pump.

The present invention, cavitation occurs in order to use the air incorporation of air at negative pressure suction of the circulating water pump of the external type filter attached, which in order to efficiently minimize vacuo bunk atmospheric pressure In the device, an inlet valve and an outlet valve are installed in the main body container. The valve material is made of elastic synthetic resin, and the valve uses the elasticity of the material.

The inlet valve of the atmospheric pressure reducing device main body, which is connected to the connecting tube connecting portion of the atmospheric pressure reducing device combined with the valve and the water pipe inlet union of the circulating water return tube and sucks the inside of the device with negative pressure in the circulating water return tube. The air is taken in from the air, passed through the installed valve and depressurized by this resistance, the atmospheric pressure is reduced by one step with the inlet valve of the atmospheric pressure reducing device, and the first reduced pressure is sucked into the outlet valve and further reduced by the resistance of the outlet valve. The most important feature is that the second stage pressure reduction is made to pass through valves installed at the inlet and outlet, which are decompressed at the stage.

The effect of the outlet valve is a pressure reducing action of the second stage, wherein the vacuum two-stage air is brought into such a state the pressure no suction at a negative pressure to the air mixing unit water passage pipe, is fed, the air mixing section water flow Inflated by suction in the pipe , stays in the shape of a balloon, is intermittently shredded from the tip and carried into small bubbles and does not damage the circulating water pump, the outlet valve acts as a feedback effect, when the circulating water cycle is stopped The outlet valve has the advantage of also acting as a backflow prevention valve.

The atmospheric pressure reducing device of the present invention minimizes the cavitation phenomenon that occurs when the atmosphere is sucked and taken in using the negative pressure in the circulating water return pipe (7) during operation of the circulating water pump (11). By controlling the temperature, the air can be taken in without damaging the circulating water pump, so that photosynthetic bacteria floating in the air are mixed.

The photosynthetic bacteria use light as energy, the culture is easy, the fungus is safe and the growth rate is fast, and the metabolites in the decomposition of organic matter are nutritious and feed, the environmental conditions in the ornamental aquarium (19) breed Suitable for growth and plays a major role in the aquatic ecosystem (19) by utilizing this property of acting from organic matter to ammonia, nitrous acid, and nitrate to nitrogen.

It is easy to take photosynthetic bacteria into the aquarium (19) together with the atmosphere and allow them to propagate and colonize, and it can be used for denitrification-reduction filtration.

Photosynthetic bacteria can be expected to denitrify because some bacteria also perform nitrate respiration under anaerobic dark conditions. Anaerobic nitrifying bacteria placed in an anaerobic environment as photosynthetic bacteria facultative anaerobic nitrifying bacteria are biological oxidation chain filtration Denitrification nitrate respiration using the nitrate bound oxygen remaining as the final metabolite in the substrate as the substrate, nitrate is reduced to nitrogen and discharged to the outside of the water tank, and a denitrification reduction filtration water layer is possible Become

Due to the characteristics of photosynthetic bacteria as facultative anaerobic nitrifiers, the remaining environment is the best in the aquarium (19) in the aquarium. By supplying oxygen and photosynthetic bacteria in the aquarium (19), the amount of nitrate remaining is reduced. It can be maintained and the frequency of water changes is reduced.

Oxygen significantly affects the promotion of denitrification nitrate respiratory reduction filtration by facultative anaerobic nitrifying bacteria. When organic substances are decomposed in anaerobic environments, nitrifying bacteria use oxygen as an oxidizing agent. Nitrate is reduced and returned to nitrogen (nitrate respiration), free oxygen is required for the activity of biological oxidation chain filtration, and the final metabolite of biological oxidation chain filtration is necessary for anaerobic respiration of facultative anaerobic nitrifying bacteria .

Nitrate is reduced to nitrogen by the nitrate respiration and is converted into bubbles and processed out of the water tank (17), and a substrate for anaerobic nitrifying bacteria is generated. It is important to supply free oxygen for the activity of anaerobic nitrifying bacteria. The anaerobic nitrifying growth culture is also contradictory to anaerobic, but the presence of oxygen is greatly related to the balance in the aquarium (19).

In order to take in the atmosphere, the atmospheric pressure is removed from the inlet of the filter (13) through the porous water in the filter (13) using the negative pressure in the circulating water return pipe (7) during operation of the circulating water pump (11). It is important to supply oxygen etc. that are close to free oxygen (oxygen molecules floating in the water) to the bacteria that propagate on the filter medium (14) and the bacteria in the aquarium (17). At this time, cavitation is likely to occur. By reducing the atmospheric pressure in two stages in order to control the phenomenon to the minimum, the atmosphere becomes free of pressure , and the air is sufficiently taken into the filter and the water tank without damaging the circulating water pump. An atmospheric pressure reducing device that reduces pressure in two stages, the main feature of which water quality can be maintained.

FIG. 1 is a schematic cross-sectional view of an atmospheric pressure decompression unit main body. FIG. 2 is a schematic cross-sectional view of an air-mixed water conduit. FIG. 3 is a system diagram of circulating water and the like.

Embodiments of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1 to FIG. 3, the present invention is a device for taking air into the filter (13) and the water tank (19) of FIG. 6).

Atmospheric pressure reducing unit body (1), the inlet valve (3) one-stage action of vacuum and an outlet valve and the check valve (4) is air becomes the absence of pressure in the action of reduced pressure in the second stage feed water Atmosphere is intermittently made into small bubbles in the air mixing part water pipe (6) attached to the return pipe (7), efficiently mixed to prevent cavitation phenomenon and send air without damaging the circulating water pump (11). The outlet valve is an important and essential outlet valve, and the outlet valve check valve (4) also functions as a check valve when the circulating water cycle is stopped.

This pressure reducing action is a negative pressure in the atmospheric pressure reducing part main body (1) in FIG. 1 and in the circulating water return pipe (7) during operation of the circulating water pump (11) in FIG. ) Built-in atmospheric inlet valve (3), the pressure is reduced by one stage, and the first-stage reduced pressure is sucked and passed through by the negative pressure of the circulating water return, and the outlet valve and backflow prevention valve (4) is further reduced by two stages. Here, the atmosphere is in a state without pressure.

The atmosphere depressurized in two stages is sent by the tube (8) in FIG. 3 to the FIG. 2 water pipe inlet union (5) of the air mixing part water pipe (6) attached to the circulating water return pipe (7) in FIG. In the air mixing section water pipe (6), the air that has no pressure due to the negative pressure of the circulating water and the circulating water in the air mixing section at the tip of the water pipe inlet union (5) is sucked and stays in a balloon state. The air pipe inlet union (5) of the air mixing part water pipe (6) is intermittently sucked to negative pressure, cut into small bubbles and close to free oxygen, and is intermittently carried. The tip is attached in a state of being slightly inclined in the flow direction and pierced into the inside of the pipe, and the atmosphere in which the pressure has been lost is efficiently made into bubbles in a state close to free oxygen by increasing the throttle effect.

Small bubbles near free oxygen are gently sent into the filter (13) in FIG. 3 together with new bacteria in the air, and the filter medium (14) in the filter (13) acts as a buffer. Some of the air bubbles that do not damage the circulating water pump (11) are the filter medium (14), and take time for the bacteria that propagate here and new bacteria to supply oxygen in a state close to free oxygen.

By using the air efficiently, it is possible to use and supply 0.03% natural carbon dioxide together with oxygen in the air, and artificial carbon dioxide is used for the aquatic plants in the aquatic aquarium (17). By making use of photosynthetic bacteria floating in the atmosphere in the aquarium (19), the energy saving and low-cost reductive filtration water tank (17) can be realized. The water quality can be maintained without long-term replacement of the water in the aquarium (11).

Test results using the above prototype (measured on the 104th day since the previous water change)
60cm tank Water temperature 24 degrees pH 6 Ammonia 0mg / liter Nitrous acid 0mg / liter Nitrate residual concentration 2.5mg / liter Carbon dioxide dissolved amount 20mg / liter This value is the optimum dissolved amount for aquatic plants and is 0.03% in the atmosphere Contained carbon dioxide is incorporated, but artificial carbon dioxide gas has been forcibly added. However, the maintenance cost of facilities is not required, energy saving, and a small amount of nitrate residue that can contribute to the environment while being in minute amounts. What can be maintained below liters is reduced by denitrifying nitrate respiration by photosynthetic bacteria.

Bubbles larger and smaller than the bottom sand (16) in the bottom of the aquarium (19), maintaining the best condition in the aquarium (19) against aquatic organisms in the aquarium (19) without long-term water change Can be confirmed now.

This seems to be a function of photosynthetic bacteria having the property of using light energy when the lighting (18) time is long.

This shows that the atmospheric pressure reducing device of the present invention takes in the atmosphere and efficiently uses oxygen and the like contained in the atmosphere.

When a prototype is installed in a 120 centimeter tank, the nitrate dissolved amount is 20 mg / liter, after one month it is 10 mg / liter, and after two months the nitrate dissolved amount is reduced to 5 mg / liter. The nitrate-dissolved amount was as high as 50 mg / liter, and after one month, 20 mg / liter, and after two months, the nitrate-dissolved amount decreased to 5 mg / liter.

Although the embodiments and examples of the present invention have been described above, the scope of the present invention is not limited to this. For example, in a large water tank, the capacity of the atmospheric pressure reduction main body (1) and the air mixed water pipe (6) The mounting position relationship and the like are appropriately selected according to the situation.

INDUSTRIAL APPLICABILITY The present invention can be used in the field of appreciation of aquatic organisms such as fish and water tanks for business growth or in the field of manufacturing and selling useful filters and growing articles.
It is an aquarium enthusiast, and it is effective when used in an existing external filter, especially in an aquarium tank.

1 Atmospheric pressure reducing part 2 Air intake part (filter)
DESCRIPTION OF SYMBOLS 3 Atmospheric inlet valve 4 Outlet valve and backflow prevention valve 5 Water pipe inlet union 6 Air mixing part water pipe 7 Circulating water return pipe 8 Connecting tube 9 Cock 10 Connecting tube connection part 11 Circulating water pump 12 Circulating water feed pipe 13 Filter 14 Filter medium 15 Circulating water suction port 16 Bottom sand 17 in the water tank 18 Tank 18 Growth and viewing lighting 19 In the water tank 20 Circulating water outlet 21 Suction plate 22 Fluid flow direction 23 Outlet valve cover

Claims (4)

    Control of nitrate accumulation, which is the final metabolite of biofiltration by oxidizing bacteria, to maintain water quality in the aquarium (19) Denitrification / nitrate respiration reduction in the aquarium (19) by a facultative anaerobic bacterium, to nitrogen gas In order to carry out the release treatment outside the water tank (17), facultative anaerobic bacteria floating and drifting in the air (19) from the atmosphere into the water tank (19) together with oxygen in the air, in the filter attached to the water tank (17) (14 ) And in the aquarium (19) to settle facultative anaerobes, especially by supplying free oxygen due to the characteristics of facultative anaerobic bacteria, it can be easily established and propagated in the aquarium (19). The water pipe (5) according to claim 4, wherein an atmospheric pressure reducing device (1) is attached, an orifice (3) is installed in the atmospheric pressure reducing device (1), and the atmospheric pressure is reduced by a throttle expansion action. Send the decompressed air to 6) and mix with the circulating water. By supplying and supplying in a state close to free oxygen in the water pipe (6), oxygen can be supplied efficiently and is permeable to the filter (14) and the water tank (19). It is characterized by the installation of the Orifes (3), which can promote the growth and growth of anaerobic bacteria, and can promote denitrification / nitrate respiration filtration and reduce atmospheric pressure to bring atmospheric oxygen close to free oxygen. The atmospheric pressure reducing device (1).   Among the various facultative anaerobes, the conditions of the place where the photosynthetic bacteria can be propagated are already in place in the stable water tank (19) where the aquatic organisms can be kept because of the characteristics of the photosynthetic bacteria. Bacteria can be used as denitrification / nitrate respiration reduction. It is important to supply oxygen (free oxygen) together with photosynthetic bacteria for the establishment, propagation, and activity in the aquarium (19) from the natural world. The photosynthetic bacteria have a relatively high growth rate due to oxygen (free oxygen). Easy to culture, proliferates by oxygen respiration even under aerobic dark conditions, and some bacteria also perform nitric acid respiration by denitrification under anaerobic dark conditions. The oxygen thus produced is mixed with circulating water in the water pipe (6) according to claim 4 so as to be in a state close to free oxygen, and is fed and fed in a filter to remove atmospheric oxygen and natural photosynthetic bacteria. In (14) and water tank (19), photosynthetic bacteria are established, breeding and growth is promoted, denitrification / nitrate respiration reduction filtration is promoted, and denitrification reduction filtration is energy-saving and low-cost in the water tank (19) To make available photosynthetic bacteria Atmospheric pressure reducing device of claim 1, wherein as for putting taken (1). The method for depressurizing the atmospheric pressure reducing device (1) according to claim 1, wherein an oriface (3) is installed in the air intake section (inside the device) to reduce atmospheric pressure and atmospheric pressure, and floating bacteria and oxygen floating in the atmosphere are introduced. The connection union (5) for the water pipe (6) according to claim 4, wherein the atmospheric pressure reducing device (1) is attached to the inlet of the circulating water pump (11) suction side filter (13), and the atmospheric pressure reducing device ( 1) The reduced pressure atmospheric outlet union (4) on the side is connected by a tube (8), and the atmospheric pressure is reduced by setting the negative pressure in the circulating water return pipe (7) and the atmospheric pressure reducing device (1) to the same negative pressure. Due to the negative pressure of the circulating water pump (11), the atmosphere (3) installed in the apparatus (1) sucks and passes one atmospheric pressure, and the atmosphere is depressurized by the expansion (3) by the orifice (3).
If the atmospheric pressure of atmospheric pressure is directly mixed into the negative pressure of the circulating water and sucked in, it is a circulating water containing bubbles and damages the circulating water pump (11). In order to make it close, the decompressed atmosphere is mixed with circulating water in the water pipe (6) attached to the suction side of the circulating water pump (11) to bring it into a state close to free oxygen. The atmospheric pressure reducing device (1) according to claim 1, characterized in that an orifice (3) for decompressing is incorporated.   Circulating water pump (11) Water pipe inlet union (5) attached to the suction side (inserted into the water pipe and merged with circulating water and decompressed air), where the union (5 The air outlet is attached with an inclination so as to be slightly in the direction of the circulating water flow.

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