KR101279137B1 - Water quality purification system of small water area - Google Patents

Abstract

It aims to provide a water quality purification system that specializes in water quality improvement in small water bodies, realizes simple configuration, low cost, ease of operation and maintenance, and can achieve water quality improvement efficiently and efficiently.
The present invention provides a treatment compartment excretion structure for disposing a treatment compartment in which a part of a small body of water is segregated, a pressurized ozone treatment apparatus for pressurizing ozone treatment to obtain ozonated water, and ozone treatment water. Pressure reducing chamber, a decompression chamber for obtaining de-zone treatment water, a de-zone treatment water supply device for supplying the de-zone treatment water into the treatment compartment, and aeration of the bottom layer water in the treatment compartment into the atmosphere, A water purification system for a small-scale body of water comprising an oxygen aeration dissolving device for obtaining the oxygen aeration, and an oxygen dissolved water supply device for supplying the oxygen dissolved water to the bottom layer in the treatment compartment.

Description

Water quality purification system of small water area

The present invention relates to a water purification system for a small body of water.

In recent years, the water quality of water bodies such as lakes and rivers tends to be improved as a whole body of water by limiting inflow loads of environmental deterioration factors such as nitrogen, phosphorus, and organic matters that deteriorate the water quality in addition to maintenance of sewerage systems and septic tanks. However, the water quality of small water bodies such as small rivers, lakes, rivers or shallow areas of lakes and ponds is not limited thereto.

In general, in small bodies of water such as small rivers, lakes, rivers or shallow areas of lakes, ponds, the inflow load limit of the environmental deterioration factors is not sufficient in the surrounding area, and the environmental deterioration factors accumulated in the past are removed. Because it is not, it remains, and eutrophication progresses and water quality does not improve and tends to deteriorate.

As an example of nitrogen as one of the environmental deterioration factors, ammonia-type nitrogen produced by ammonia of organic nitrogen, uric acid, urea, and the like is nitrogenized by nitrification bacteria to form nitrogen in the form of nitric acid. This nitrogenous form of nitrogen is denitrified by denitrification bacteria and reduced to nitrogen gas or dinitrogen monoxide to establish a series of nitrogen cycles. (I) Proliferation may promote deterioration of water quality.

In order to improve water quality in such small waters, some treatment methods such as dilution method and local aeration method are implemented, but the complexity of water treatment technology, high cost, and maintenance It is said that the result is insufficient for reasons such as difficulty in securing land and difficulty in securing land.

Regardless of the size of the water body, as a technique for improving the above-mentioned water quality deterioration, for example, the gas-liquid dissolving apparatus of Japanese Patent No. 3849986 is provided. The gas-liquid dissolving apparatus is a gas-liquid dissolving apparatus which dissolves gas containing oxygen in water collected in an insufficient oxygen water to increase dissolved oxygen concentration, and returns water having a high dissolved oxygen concentration to the insufficient oxygen water. A water intake section for collecting the water to be treated in the water, a supply section for supplying the gas containing oxygen, a gas-liquid dissolution chamber having a top plate at the top with at least one hole in the lower section, And the gas supplied from the supply part and the water supplied from the water intake part are blown upwards to collide with the inner wall of the top plate, filling the gas-liquid dissolution chamber with gas bubbles and water, and And a nozzle which severely stirs the bubbles and the water, and is disposed outside the gas-liquid dissolution chamber through the gas-liquid dissolution chamber and the hole. The gas bubbles are discharged from the gas-liquid dissolution chamber while storing the bubbles and water flowing out from the gas-liquid dissolution chamber, the upper part has a gas bleeding hole which escapes the separated bubbles to the outside, and the lower part is separated from the bubbles. And a gas-liquid separation chamber having a water outlet for extracting one water, and a water-receiving unit for conveying water taken out of the air outlet to the insufficient oxygen water.

However, in order to operate the gas-liquid dissolving apparatus of Japanese Patent No. 3849986, a certain high water pressure is required. Therefore, sufficient oxygen dissolution effect cannot be obtained within a depth of 10 m, for example, a deep water like a dam, and a flow of water It is not possible to achieve sufficient oxygen dissolved effects unless it is a non-existent body of water.

Moreover, this gas-liquid dissolving apparatus aims at making oxygen exist in high concentration and extensively in water, and it may cause denitrification inhibition with respect to removal of nitrogen out of the water system. In addition, such a gas-liquid dissolving device is not easy to be transported or operated in a large size and is a large liquid.

As a result, it specializes in improving the water quality of small bodies of water such as small rivers, lakes, rivers or shallow areas of lakes, ponds, etc., and realizes simple configuration, low cost, and ease of operation and maintenance, effectively and efficiently. There is no water purification system that can achieve water quality improvement.

Japanese Patent No. 3849986

The present invention has been made in view of such irrationality, and is specialized in water quality improvement in a small water body, and can achieve water quality improvement effectively and efficiently while realizing easy configuration, low cost, and ease of operation and maintenance. The purpose is to provide a system.

In order to improve the water quality of a small body of water, the present inventors arrange a treatment compartment in a part of the small body of water, and view the inside of the treatment compartment as a dust box, and supply the wastewater after treatment into the treatment compartment to supply waste. After being deposited on the bottom, he gained groundbreaking knowledge that it would be removed out of a small body of water.

As a result, the invention made in order to solve the above-mentioned problems, the treatment compartment excretion structure for excavating the treatment compartment isolating a portion of the small water body, and pressurized to obtain ozone treated water by pressurized ozone treatment of the muddy water of the small water body An ozone treatment apparatus, a decompression chamber for pressurizing the ozone treatment water to obtain de-ozone treated water, a deozone treated water supply device for supplying the de-ozone treated water into the treatment compartment, and the treatment compartment A small-scale device having an oxygen aeration dissolving device for aeration of low bed water into the atmosphere to obtain oxygen dissolved water, and an oxygen dissolved water supply device for supplying the oxygen dissolved water to the lower layer in the treatment compartment. It is the water purification system of the body of water.

The water purification system of the small water body is provided with a treatment compartment excrement structure for disposing a treatment compartment in which a part of the small body of water is sequestered. Based on the basic concept of improving the water quality of the entire small water body by supplying the treated water after treating the wastewater of the small water body to the treatment compartment by depositing the waste included in the treated water on the bottom of the treatment compartment, do.

Specifically, the water purification system of the small-scale water body is provided with a pressurized ozone treatment apparatus for obtaining ozone-treated water by pressurizing and ozone-treated the sewage water of the small-sized water. In addition to improving the chromaticity, transparency, odor, and chemical oxygen demand (COD) of the water quality in a short period of time, and having a decompression chamber for depressurizing the ozone treated water to obtain de-zone treatment water, Since the reactive ozone is changed to oxygen by the depressurizing action to remove the unreacted ozone, it is possible to achieve the reduction or reduction of the environmental load caused by the ozone, and furthermore, to remove the ozone-treated water into the treatment compartment. Equipped with an ozone treatment water supply device, the de-zone treatment water promotes the decomposition or aggregation of organic matter in the treatment compartment, Sex and simultaneously by sedimentation (沈降), precipitated by binding to each other in the water or the heavy metals and, and both can stay in the processing compartment.

In addition, the water purification system of the small-scale water body is provided with an oxygen aeration dissolving device for obtaining oxygen-dissolved water by aeration of the lower-bed water in the treatment compartment into the atmosphere. Dissolved water can be obtained, and the oxygen-dissolved water supply device for supplying the oxygen-dissolved water to the bottom layer in the treatment section, wherein the oxygen-dissolved water diffuses substantially horizontally over the low to mid-layers of the small-sized water, treats the treatment compartment. Covering the inside, forming oxygen-barrier and combining phosphorus eluted from the waste deposited in the bottom layer with iron ions to precipitate, and nitrogen, phosphorus, iron or manganese from the bottom layer which causes eutrophication Elution of metals can also be prevented or reduced, and denitrification in a small body of water can be promoted.

In addition, in the water purification system of the small-scale water body, since the treatment compartment has a limited area, waste deposited on the bottom can be easily removed, and resource recovery of phosphorus and metals can be achieved. That is, the water quality purification system of the small water body specializes in the water quality improvement of the small water body, and can realize water quality improvement efficiently and efficiently by realizing all the simple structure, low cost, and the ease of operation and maintenance.

The water purification system for the small-scale water body may further include a structure in which the oxygen aeration dissolving device aerations the surface water in the small-scale water body into the atmosphere.

The surface water of such a small body of water has a high dissolved oxygen concentration and a nitrate ion concentration as compared to the water in the middle to lower layers. That is, in the water purification system of the small-scale water body, the oxygen aeration dissolving device further includes a structure in which the surface water in the small-scale water body is aerated into the atmosphere. It is blended and is delivered to the bottom layer, and the above-described oxygen-dissolved water barrier effect, that is, precipitation by the combination of phosphorus and iron ions, prevention or reduction of elution of metals from the bottom layer, and denitrification in a small body of water Promotion can be more effectively achieved.

In addition, a relatively high surface water of nitrate ion concentration is blended with the original oxygen-dissolved water of the low-layer water to be transported to the low-layer, and the low-layer becomes microaerobic in the treatment compartment, so that the denitrified bacteria The denitrification activity by this is promoted, and nitrogen can be discharged out of the water system as nitrogen gas, and as a result, denitrification in the small-scale water system can be more effectively achieved.

In the water purification system of the small-scale water body, the upper end of the treatment compartment excrement structure may be disposed below the surface of the small-scale water body.

In the water purification system of the small body of water, the upper end of the treatment compartment excrement structure is disposed below the surface of the small body of water, so that the surface water of the small body of water can move freely in and out of the treatment compartment to prevent the flooding of the river. Can be reduced.

As described above, the water purification system of a small water body of the present invention is a treatment compartment excretion structure for disposing a treatment compartment that isolates a portion of the small water body, and the ozone treated water by pressurizing ozone treatment of the polluted water of the small water body. A pressurized ozone treatment apparatus for obtaining, a decompression chamber for depressurizing the ozone treatment water to obtain de-zone treatment water, a de-zone treatment water supply apparatus for supplying the de-zone treatment water into the treatment compartment, and the treatment compartment Oxygen aeration dissolving device for aeration of low water in the bottom layer to obtain oxygen dissolved water, and oxygen dissolved water supply device for supplying the oxygen dissolved water to the lower layer in the treatment compartment. It is possible to easily obtain the same type of effects as anaerobic septic tank and aerobic septic tank without adding In addition to improving the chromaticity, transparency, odor and COD of water quality, it is possible to realize the elimination of persistent nitrogen out of the water system and suppression of elution of heavy metals. It is possible to solve all the problems, the ease of maintenance and operation, and the achievement of effective and efficient water quality improvement.

1 is a schematic configuration diagram showing a water quality purification system for a small body of water according to a first embodiment of the present invention.
2 is a schematic configuration diagram showing a water quality purification system for a small body of water according to a second embodiment of the present invention.
3 is a schematic configuration diagram showing a water quality purification system for a small body of water according to a third embodiment of the present invention.
4 is a schematic configuration diagram showing a water quality purification system for a small body of water according to a fourth embodiment of the present invention.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described, referring an appropriate drawing. In addition, this invention is not limited to this embodiment.

[Water Purification System for Small-Sized Waters According to First Embodiment]

The water purification system of the small-scale water body which concerns on 1st Embodiment shown in FIG. 1 is arrange | positioned in the vicinity of the riverside of a small-sized water body, The treatment compartment excretion structure 1, the pressurized ozone treatment apparatus 2, the pressure reduction chamber 3, The de-zone treatment water supply device 4, the oxygen aeration dissolving device 5, and the oxygen dissolved water supply device 6 are mainly provided.

As a small-scale body of water subject to the water purification system of the water-scale water body according to the first embodiment, for example, a small pond, a small lake, a lake, a river with narrow, smoothly flowing rivers (a source of water to a relatively large-scale lake) And small streams).

More specifically, for example, a small body of water having a flow rate of so-called "puddle", "low spreading" and "stuck" within a depth of 10 m may be the target.

(Process compartment excrement structure)

The treatment compartment excrement structure 1 is a member for disposing a treatment compartment in which a part of a small body of water is isolated. Specifically, the treatment compartment excrement structure 1 is one or a plurality of plate-shaped members disposed substantially perpendicular to the bottom of a shallow area away from the riverside of a small body of water. By (1) linking, a part of the small body of water is segregated and driven in, and a part of the small body of water can be excavated from the outside. This section corresponds to the treatment section described later.

In addition, although the lower end of this treatment compartment excretion structure 1 is grounded with the bottom of the small body of water, the upper end is disposed below the surface of the small body of water.

The size, shape, and material of the treatment compartment excrement structure 1 are not particularly limited as long as it can excrete a section isolated from the outside which drives a part of the small body of water. For example, as long as the treatment compartment excrement structure 1 is a sheet pile of wood, and the sheet pile and a part of a small body of water can be driven in the topography of the river wall of the riverside, one or more sheets may be connected. Alternatively, the treatment compartment excrement structure 1 may be a member having flexibility in order to easily set the size of the treatment compartment and to remove the treatment compartment.

In addition, as long as the waste W after wastewater treatment, which will be described later, can be retained and deposited in the treatment compartment, the treatment compartment excrement structure 1 needs to have an airtight configuration without any gap so as to completely isolate the inside and outside of the treatment compartment. There may be some clearance and structural clearance, for example.

The size of the treatment compartment disposed by the treatment compartment excretion structure 1 is not particularly limited, and can be freely set according to the treatment capacity of the pressurized ozone treatment apparatus 2 described later or the degree of pollution of water in a small water body. For example, if the area of the treatment compartment has no flow rate, it can be set to about 100 m 2 and the water depth to about 1 to 10 m.

(Pressurized ozone treatment device)

The pressurized ozone treatment apparatus 2 is an apparatus for obtaining ozone treated water Q by pressurized ozone treatment of the filthy water P in the small-scale water body. Specifically, the pressurized ozone treatment apparatus 2 is disposed on a river wall outside a small water system, and is brought into contact with ozone while pressurizing the polluted water P supplied from the polluted area of the small water body. It can be dissolved and treated.

In addition, the pressurized means and the ozone generating means in this pressurized ozone treating apparatus 2 can realize pressurized ozone treatment of the dirty water P, and are not particularly limited and known techniques can be used.

The ozone concentration in the ozone treated water Q treated by the pressurized ozone treating apparatus 2 is not particularly limited, but may be, for example, about 60%.

In addition, it is not specifically limited as a supply means of the wastewater P to the pressurized ozone treatment apparatus 2 in a small water body, For example, well-known techniques, such as a pump, can be used.

Moreover, it is not specifically limited as a supply place of the wastewater P in a small water area, It can supply water from a surface layer to a middle layer so that the low layer may not be stirred and disturbed, regardless of the inside and outside of the said treatment compartment.

Moreover, it is not specifically limited also as a supply amount of waste water P, It can determine by the treatment capacity of the pressurized ozone treatment apparatus 2, the magnitude | size of a treatment compartment, and the pollution degree of the waste water P.

(Decompression chamber)

The decompression chamber 3 is a member for depressurizing the ozone-treated water Q to obtain de-zoned water R. Specifically, the decompression chamber 3 is disposed together with the pressurized ozone treatment apparatus 2 on the river wall outside the small-scale water system, and is the pressurized ozone treatment water Q obtained by the pressurized ozone treatment apparatus 2. ) Can be removed under reduced pressure to remove unreacted ozone contained in the ozone treated water (Q). As a result, deozone treated water (R) from which unreacted ozone has been removed can be obtained.

Moreover, it is also possible to make this pressure reduction chamber 3 and the said pressurized ozone treatment apparatus 2 into an integral structure.

The pressure reduction means in the pressure reduction chamber 3 is not particularly limited, and the above-mentioned release of the pressurized state can be performed rapidly or gently, but as described later, in order to reliably remove the unreacted ozone, It is preferable to rapidly release the pressurized state.

In addition, the residence time of the deozone treated water R in the decompression chamber 3 is not particularly limited, but as described later, it is preferable to set a residence time of 20 seconds or more in order to reliably remove the unreacted ozone. Do.

(De-Ozone Treatment Water Supply Device)

The dezoned treatment water supply device 4 is a device for supplying the dezoned treatment water R into the treatment compartment, and is provided on the steel wall outside the small water body system together with the decompression chamber 3. The deozone treated water supply means of the deozone treated water supply device 4 is not particularly limited as long as the deozone treated water R supplied from the decompression chamber 3 can be supplied into the treatment compartment. For example, well-known techniques, such as a pump and a hose, can be used.

(Oxygen aeration dissolving device)

The oxygen aeration dissolving apparatus 5 is an apparatus for obtaining oxygen dissolved water U by aeration of the bottom layer water S in the treatment compartment into the atmosphere T. Specifically, the oxygen aeration dissolving device 5 is disposed in a substantially vertical shape in the treatment compartment, the lower end of which is located at the bottom of the treatment compartment of the small body of water, and the upper part is above the surface of the small body of water (that is, the atmosphere). It is located. From the lower end of the oxygen aeration dissolving device 5, the bottom water S in the treatment compartment of a small body of water is collected, and the bottom water S containing the atmosphere T containing oxygen is aerated from the upper end to the atmosphere T. Oxygen dissolved water (U) can be obtained.

The shape and structure of the oxygen aeration dissolving device 5 include the harvesting of the bottom water S by the lower end, the harvesting of the atmosphere T by the upper end, and the aeration between the bottom water S and the air T. It will not specifically limit, if it can achieve, For example, a cylindrical shape can also be used. Moreover, it does not specifically limit as such a means of harvesting the low-rise water S, and a means of harvesting the atmosphere T, for example, well-known techniques, such as a pump, can be used.

In addition, the oxygen aeration dissolving device 5 further includes a structure in which the surface water V in the small-scale water body is aerated into the atmosphere T. As described above, the oxygen aeration dissolving device 5 is not particularly limited as long as it can achieve the aeration between the surface water V and the atmosphere T as the structure in which the surface water V is aerated in the atmosphere T.

(Oxygen Dissolved Water Supply Device)

The acid-transmitted dissolved-water supply apparatus 6 is an apparatus for supplying the said oxygen-dissolved water U to the bottom layer in the said processing compartment. Specifically, the ordinary dissolved water supply device 6 is a device for supplying oxygen dissolved water U obtained from the oxygen aeration dissolving device 5 to the lower layer in the treatment compartment, and this oxygen dissolved water supply device 6 ) May be disposed at the lower end of the oxygen aeration dissolving device 5 so as to have both structures.

In addition, as the supply means of the oxygen dissolved water (U) in the oxygen dissolved water supply device (6) as long as the oxygen dissolved water (U) can be supplied to the bottom layer in the treatment compartment is not particularly limited, for example, such as a pump Known techniques can be used.

(Operation procedure of water quality purification system of small water body)

Next, with reference to FIG. 1, the operation procedure of the water purification system of the small-scale water body which concerns on 1st Embodiment is demonstrated centering on effect.

(a) excretion of treatment compartments

The treatment compartment excretion structure 1 is disposed approximately vertically to the bottom of the shallow water wall of the small river body, and is connected to the curved river wall topography and the treatment compartment excrement structure 1 to be part of the small water system. Isolate segregated treatment compartments. In this case, as described above, the treatment compartment excrement structure 1 does not require an airtight configuration so as to completely isolate the interior and exterior of the treatment compartment, and may have a gap or a structural margin, for example. In addition, in the case where there is no flow velocity, the area of the treatment compartment may be set to about 100 m 2 and the water depth of 1 to 10 m.

Here, the upper end of the treatment compartment excrement structure 1 is disposed below the surface of the small body of water, so that the surface water of the small body of water can move freely in and out of the treatment compartment, and as a result, prevents the overflow of the river or Can be reduced.

(b) pressurized ozone treatment

Wastewater (P) exists in the contaminated area where the water quality is contaminated in a small water body, and the pollutant water (P) contains environmental deterioration factors such as nitrogen, phosphorus, and organic matter which degrade the water quality. The dirty water P is supplied to the pressurized ozone treatment device 2 by a pump or the like, and the ozone water P is contacted with ozone while the pressurized ozone treatment device 2 is pressurized, and the ozone is dissolved and treated. .

In the pressurized state, ozone treatment causes ozone to dissolve a lot of ozone in the pressurized water, and rapidly suspends the suspended solids in the polluted water P over a short period of time. It is possible to improve chromaticity and transparency (improve the landscape surface), remove odors, and improve COD that is difficult to decompose into COD that is easy to decompose.

In addition, in the case where ozone water is treated with ozone by babbling, the dissolved concentration of ozone is about 15%, but in the case of pressurized ozone treatment, the dissolved concentration of ozone is about 60%, and about 60%. The concentration of% can sufficiently achieve immediate water quality improvement over the short term as described above.

In addition, by using the water supply portion as the surface layer to the middle layer in the small-scale water of the polluted water P, it is possible to prevent or reduce the diffusion of the above-mentioned environmental deterioration factors existing near the bottom layer without stirring the bottom layer. .

(c) deozone treatment

Here, ozone has properties such as sterilization, deodorization, removal of organic matters, and if it is a small amount, it is also possible to use it for the purpose of washing vegetables, for example, but it is known to exhibit strong toxicity on the other hand. When unreacted ozone is released into the air by the above-mentioned pressurized ozone treatment, such waste ozone is a cause of stratospheric destruction and global warming, and thus, it is necessary to remove it with activated carbon or zeolite. do.

In addition, when such waste ozone is discharged into a small body of water, there is a fear that damage to the ecosystem near the time of release. Here, the pressure-reduced ozone treated water (Q) obtained by the pressurized ozone treatment device (2) is released by the pressure reduction chamber (3) in a reduced pressure state. Since it changes to stable oxygen and unreacted ozone is removed, the environmental load by ozone can be eliminated or reduced. Removal of the unreacted ozone in the ozone treated water Q by such a decompression chamber 3 can be more completely achieved by rapidly performing depressurization after pressurization. As the decompression conditions, at least 20 seconds or more is required to be left after the decompression release, and for example, unreacted ozone in the ozone treated water Q can be completely removed by standing for 20 seconds to 40 seconds.

In addition, there are a number of known technologies related to the treatment of dirty water using such an ozone dissolving treatment, but the concept of removing excess ozone by high pressure contact dissolving using the pressure reduction chamber 3 is revolutionary.

(d) supply of deozone treated water into treatment zones;

The deozone treated water supply device 4 supplies the deozone treated water R supplied from the decompression chamber 3 into the treatment compartment. The deozone treated water (R) promotes the decomposition or aggregation of organic matter in the treatment compartment to form blocks for sedimentation and deposition, and the phosphorus and heavy metals in the water bind to each other to precipitate and remain in the treatment compartment. Can be deposited. These blocks settle in the treatment compartment and are deposited on the bottom, and are biodegraded by microorganisms in the water body. However, biodegradation by such microorganisms leads to insufficient oxygenation and oxygen-free oxygenation in the water body, Elution of nutrients (nitrogen, phosphorus, etc.) and harmful metals (arsenic, etc.), which are the causes of abnormal plankton growth at the bottom, is concerned.

(e) Formation of oxygen dissolved water barrier

Here, the water quality purification system of the small-sized water body which concerns on 1st Embodiment for preventing or reducing the lack of such oxygenation, anoxic progression, the elution of the nutrient, the toxic metal (arsenic, etc.) from the bottom of a water body, Oxygen-dissolved water barriers are formed in the lower to middle layers in the treatment compartment in the small-scale water body. That is, the bottom layer S is collected from the lower end of the oxygen aeration dissolving apparatus 5 and the bottom layer water S collected from the upper part containing oxygen from the upper part is aerated into the atmosphere T. In this way, a high concentration of oxygen dissolved water U can be obtained, and furthermore, the oxygen dissolved water U obtained from the oxygen aeration dissolving device 5 is supplied to the lower layer in the treatment compartment by the oxygen dissolved water supply device 6. In this process, the oxygen dissolved water (U) is diffused approximately horizontally through the low to middle layers of a small body of water in the treatment compartment while preventing or reducing the diffusion of the above-mentioned environmental deterioration factors present in the vicinity of the bottom layer without stirring the bottom layer. In the bottom layer that causes eutrophication by forming a cover (barrier) of oxygen-dissolved water and depositing phosphorus eluted from the waste deposited on the bottom with iron ions. Improve cow, phosphorus, iron, manganese metal elution is also prevented or reduced, and in addition the activity of denitrifying bacteria in the digestive by may promote denitrification in a small body of water.

To explain this, generally, the lower layer of a small body of water is anaerobic body, but it supplies oxygen dissolved water (U) which dissolved oxygen of high concentration to the lower layer, and the water quality of the lower layer is aerobic and The barrier effect created by the anaerobic mixture, the aerobic water quality promotes the decomposition of organic matter by the microorganisms at the bottom of the treatment compartment, and blocks the elution at the bottom of the heavy metal (elution). It accelerates the oxidation of heavy metals and the like and resuspends them, and further improves the activity of denitrified bacteria.

As described above, the concept of forming oxygen dissolved water barrier by supplying and dispersing oxygen dissolved water in which oxygen is dissolved in the low water to the bottom of the water is different from the oxygen supply means by aeration. Without stirring, oxygen can be efficiently and efficiently diffused into the lower to middle layers.

In this case, when the dissolved oxygen concentration in the treatment compartment is about 3-4 mg / 1, the above-described effects can be effectively and efficiently exhibited.

Furthermore, the oxygen aeration dissolving device 5 further includes a structure for aeration of the surface water V in the small-scale water body into the atmosphere T. The surface water (V) of such a small body of water has a higher dissolved oxygen concentration and nitrate ion concentration than the water of the middle to lower layers, and the surface water (V) has a high water temperature. Because of local disturbances (rises), a mixture of aerobic and anaerobic bodies occurs.

That is, the oxygen aeration dissolving device (5) further comprises a structure for aeration of surface water (V) in a small body of water into the atmosphere (T), the dissolved oxygen concentration in the original oxygen dissolved water (U) Relatively high surface water (V) is blended and sent to the bottom layer, and the effect of the above-described oxygen-dissolved water barrier, that is, precipitation by the combination of phosphorus and iron ions, prevention or reduction of the elution of metals from the bottom layer, and small-scale water bodies The promotion of denitrification in the inside can be more effectively achieved.

In addition, a relatively high surface water (V) of nitrate ion concentration is blended with the original oxygen-dissolved water (U) in the low-level water (S) to be delivered to the low-layer, and ammonia generated by insufficient oxygenation and anoxicization of the bottom in the treatment compartment is When proceeding to nitrification (oxidation) by the action of the oxygen-dissolved water barrier described above, the lower layer becomes fine aerobic in the treatment compartment, which promotes denitrification activity by denitrified bacteria, and proceeds to nitrification and denitrification. As a result, the reaction rate is accelerated, and as a result, denitrification is promoted, and it is possible to discharge nitrogen (nutrient salt) in a small body of water out of the system more effectively and efficiently.

If the mixed concentration of the surface water V to the bottom water S is, for example, about 5%, the above-mentioned denitrification can be reliably achieved.

(Waste collection)

The waste W finally deposited on the bottom of the treatment zone of the small-scale water body is treated as industrial waste at regular intervals, and the recovery of heavy metals can be achieved while maintaining the quality of the small-scale water body. Even if the above-mentioned microorganism decomposition is not sufficiently progressed in the bottom of the treatment compartment, and the so-called smothered dog soil deposited on the bottom is deposited, the treatment compartment is small in size, and the soil is removed from the water system. It is easy to do.

[Water Purification System for Small-Sized Waters According to Second Embodiment]

In the water quality purification system of the small water body which concerns on 2nd Embodiment shown in FIG. 2, the upper end of the treatment compartment excretion structure 7 is arrange | positioned above the water surface of a small water body.

In this way, the upper end of the treatment compartment excrement structure 7 is disposed above the surface of the small-scale water body, so that the treatment compartment can be configured more closed, and the water purification treatment can be concentrated. In this case, the exchange of water in and out of the treatment compartment can be performed using, for example, a pump or the like. In addition, since it is the same form as the case of 1st Embodiment except the process compartment excretion structure 1, description is abbreviate | omitted about the structure, effect | action, etc. of the water purification system of the small-scale water body which concerns on 2nd Embodiment.

[Water Purification System for Small-Sized Waters According to Third Embodiment]

The water quality purification system for small water bodies according to the third embodiment shown in FIG. 3 is characterized in that the treatment compartment of the small body of water is provided with only the treatment compartment excrement structure 8 that is not a river wall topography.

In this way, the treatment compartment of the small body of water is provided only with the treatment compartment excrement structure 8, and the size and shape of the treatment compartment can be set more concretely regardless of the river wall topography. As a structure of this process compartment excretion structure 8, a box-shaped iron cylinder is mentioned, for example. Also in this case, although the upper end of the treatment compartment excretion structure 8 is disposed below the surface of the small body of water, it is also possible to be disposed above the surface of the water.

In addition, since it is the same form as the case of 1st Embodiment except the process compartment excretion structure 8, description is abbreviate | omitted about the structure, effect | action, etc. of the water purification system of the small-scale water body which concerns on 3rd Embodiment.

[Water Purification System for Small-Sized Waters According to the Fourth Embodiment]

In the small-scale water purification system according to the fourth embodiment shown in FIG. 4, the pressurized ozone treatment apparatus 2, the reduced pressure chamber 3, and the de-zone treatment water supply device 4 are based on the water surface in the small-scale water body (9). It is characterized by the excretion using). By using such a foundation 9, the pressurized ozone treatment apparatus 2, the decompression chamber 3, and the de-zone treatment water supply device 4 are provided at any place in the small body of water regardless of the terrain outside the small body of water. It is possible to excrete freely.

In addition, since it is the same form as the case of 1st Embodiment except the base 9, description is abbreviate | omitted about the structure, effect | action, etc. of the water purification system of the small-scale water body which concerns on 4th Embodiment.

[Water Purification System for Small-Sized Waters According to Fifth Embodiment]

The water purification system (not shown) of the small-scale water body which concerns on 5th Embodiment is effective also when a green algae generate | occur | produce in a small-scale water body. Since the structure, the effect, etc. of the water purification system of the small-scale water body which concerns on 5th Embodiment are the same form as the case of 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

Green algae can freely change depths with gas membranes, are a source of odors in small bodies of water, and are also bad for landscapes. Such green algae are treated with the pressurized ozone treatment apparatus 2 and the decompression chamber 3 using the dirty water P, and the green algae can be killed by decomposing the gas film by the pressurizing and depressurizing action.

In addition, there is a means for decomposing the green algae using the cavitation action of the pump that sucks the waste water as a known technique, but there are also the green algae passing through the cavitation action, and there is a problem that the killing action of the green alga is inefficient.

In addition, the water purification system of the small-scale water body of this invention is not limited to the said embodiment. In addition, the water purification system of the small-scale water body of the present invention may include a mechanism capable of adjusting the oxygen concentration in the oxygen-dissolved water in the oxygen aeration dissolving device and the oxygen-dissolved water supply device described above.

In a series of denitrification reactions in a small body of water, the nitric acid reaction rate is fast enough to be aerobic, but conversely, the reaction rate rate of the denitrification reaction is low.

Therefore, in order to perform nitrogen removal by a rapid denitrification reaction, it is necessary to proceed with a good balance of these reactions, and a good balance of these reactions can be freely achieved by a mechanism capable of adjusting the oxygen concentration in the oxygen dissolved water. Can be.

In addition, for example, as a small-scale body of water which is the object of water purification of the water-purification system of the small-scale water body of the present invention, a small-scale river which becomes a feeling of inflow of water into a relatively large lake is also targeted. In this case, the water quality purification system of the small-scale water body of the present invention improves the water quality of the water of the previous stage flowing into the large-scale lake, and as a result, the water quality improvement can be indirectly achieved in the large-scale lake.

In addition, relatively large lakes are also covered. For example, it is also possible to make the shallow area (closed area) of the lake into a small body of water subject to the water purification of the water purification system of the small water body of the present invention, thereby partially improving the water quality in a large lake. It is possible to.

As described above, the water purification system of the small water body of the present invention can be suitably used for improving the water quality of small water bodies such as small rivers, lakes, ponds, etc., in cities with increased population density. Although the housing base is established around small water bodies in the city, it is difficult to secure new land for water environment measures, and it is often difficult to improve the water quality of small water bodies. It is a small system that can be easily installed or moved in a simple configuration that can be used as a general-purpose product, and is intensive and can be operated for a short time.

Moreover, the water quality purification system of the small water body of this invention can be used suitably also for the water quality improvement of a small water body in a developing country. In particular, harmful heavy metals, which are a problem in securing drinking water, which is the biggest problem in developing countries, can be expected to be sufficiently removed by the water purification system of a small water body of the present invention.

One ; Treatment compartment excretory structure 2; Pressurized Ozone Treatment System
3; Decompression chamber 4; Deozone Treatment Water Supply Device
5; Oxygen aeration dissolving unit 6; Oxygen Dissolved Water Supply
7; Treatment compartment excretory structure 8; Treatment compartment excrement structure
9; Foundation P; Tak soo
Q; Ozonated water R; Deozone treated water
S; Low water T; Waiting
U; Oxygen dissolved water V; Surface water
W; waste

Claims (3)

A treatment compartment excrement structure for disposing treatment compartments that isolate a portion of a small body of water;
A pressurized ozone treatment apparatus for pressurizing ozone treatment to obtain ozonated water,
A decompression chamber for depressurizing the ozone treated water and obtaining de-ozone treated water;
A deozone treated water supply device for supplying the deozone treated water to the treatment compartment;
An oxygen aeration dissolving apparatus for aeration of the bottom water in the treatment compartment into the atmosphere to obtain oxygen dissolved water;
An oxygen dissolved water supply device for supplying the oxygen dissolved water to a lower layer in the treatment compartment; Water purification system for a small body of water characterized in that it comprises a. The method of claim 1,
And the oxygen aeration dissolving device further comprises a structure for aeration of surface water in the small water body into the atmosphere. 3. The method according to claim 1 or 2,
The water purification system of a small body of water characterized in that the upper end of the treatment compartment excretion structure is disposed below the surface of the small body of water.

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