JP2509548Y2 - Water purification equipment such as water storage tanks and wastewater purification tanks - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water purifying device such as a water storage tank for a lawn grass watering pond of a golf course or a farm, a septic tank for factory wastewater, and the like.

[0002]

[Prior Art and its Problems] Generally, it is necessary to secure a large amount of water for sprinkling (about 800 m ^{3 in} 18 holes) for turfgrass management on a golf course. Water and purified water become the water source. Since these waters are often eutrophied and polluted and cause turfgrass disease, there is a growing tendency to rely on chemical fungicides for turfgrass management. However, as pesticides mix into groundwater and become one of the main causes of polluting drinking water, it is necessary to purify the water in the water tank to reduce the use of pesticides.

By the way, excess nitrogen is contained in pollutants of water,
Including inorganic salts such as phosphorus and organic substances, reducing nitrogen and phosphorus, which are the causes of eutrophication in the hydrosphere, has been added as a new item of water quality regulation. Therefore, the water purification system for the water storage tank must also be based on this situation. However, unlike carbon and nitrogen, phosphorus, which is the largest trace element indispensable to living organisms, is not gasified and reduced from the hydrosphere to the atmosphere, and is ionized as a phosphate to dissolve in water. Stay in the hydrosphere in a state. Therefore, it is very difficult to physically and chemically remove it, and it is difficult to remove nitrogen and phosphorus with conventional purification equipment such as filtration and sterilization methods, and it is necessary to install a large device outside the pond.

Similar problems have occurred in shrimp farms, septic tanks for factory wastewater, and the like.

[0005]

[Object of the Invention] The present invention can purify water by biologically purifying water in a water storage tank or a septic tank without installing a special device outside to prevent eutrophication of water. It is an object of the present invention to provide a water purification device such as a water storage tank and a waste water purification tank.

[0006]

[Means for Achieving the Object] In order to achieve the above-mentioned object, the water purification device such as the water storage tank and the waste water purification tank according to the present invention is provided with a biofilm tank so as to abut against the walls of the water storage tank and the waste water purification tank. , Forming an aeration part between the biofilm tank, the water surface and the wall of the water storage tank, and forming a first biofilm layer having an aerobic microbial environment on the side of the biofilm tank far from the aeration part At the same time, a second biofilm layer having an anaerobic microbial environment is formed on the side close to the aeration part, and the upper part of the biofilm tank is arranged slightly below the water surface of the water storage tank and the upper part of the biofilm tank is arranged. It is characterized in that it is covered with a water-blocking sheet, and a sludge box is provided at the bottom of the biofilm tank.

The biofilm tank may be arranged in the center of a water storage tank, a waste water purification tank or the like instead of the wall, and the aeration section may be formed in the center of the biofilm tank.

The first biofilm layer is filled with a block-shaped microbial contact material inside the basket-shaped tank,
It is preferable that the biofilm layer is constituted by arranging a large number of string-shaped microbial adsorption nonwoven fabrics inside the basket-shaped tank.

[0009]

[Advantages and effects of the invention] In the above-mentioned purification device configuration, useful microorganisms are regularly administered to the biofilm tank to operate the aeration device. As a result, as aeration is performed from the tip of the aeration pipe, an ascending water flow is generated in the aeration part, and this water flow flows over the impermeable sheet and reaches the facing wall surface, and this water becomes a downflow. Since it flows into the biofilm tank, passes through the biofilm tank, and returns to the aeration section again, a circulating flow of water can be generated in the water storage tank. Since the biofilm tank is formed by continuously forming a first biofilm layer having an aerobic microbial environment and a second biofilm layer having an anaerobic microbial environment, it has aerobic and anaerobic properties. An artificial microbial environment can be constructed by making good use of the natural environment. Then, an ecosystem where various kinds of microorganisms are activated is formed, biochemical reactions are promoted, efficient decarbonization and denitrification are achieved, and phosphorus accumulated in the sludge basin together with sludge is efficiently removed from the hydrosphere. Can be removed. In this way, the water can be satisfactorily purified.

As described above, according to the purifying apparatus of the present invention, the power consumption required for aeration is small and the aeration is also used as circulation energy, so that the energy consumption required for purification is small. Then, not only the decomposition of organic matter but also denitrification and dephosphorization produces extremely high quality water. Moreover, phosphorus can be removed efficiently and can be taken out of the system and reused as phosphorus feed.

In addition, since it is biologically purified, it can be purified in the tank, maintenance is easy, and a large device is not required outside the tank, so that the aesthetic appearance is not impaired.

Since the first biofilm layer is filled with a block-shaped microbial contact material, and the second biofilm layer is provided with a large number of string-shaped microbial-adsorbing nonwoven fabrics,
It is possible to create the best currently considered artificial microbial environment.

[0013]

EXAMPLES FIGS. 1 and 2 show a water purifying device for a turfgrass watering pond of a golf course.
Water is stored in the water storage tank 1, and a biofilm tank 2 is installed at one corner of the water storage tank 1 so as to abut the wall 1 a of the water storage tank 1.

The biofilm tank 2 is a lattice-shaped basket formed of glass fiber reinforced plastic Nefmac (trade name of Nefcom Co., Ltd.).

The upper surface of the biofilm tank 2 is arranged slightly below the water surface of the water storage tank 1, and the upper part of the biofilm tank 2 is covered with a water-blocking sheet 3. The distance between the water surface and the water shield sheet 3 may be set to about 10 to 20 cm.

An aeration unit 4 is formed between the biofilm tank 2 and the wall 1a of the water storage tank 1, and an aeration device 4a is arranged in the aeration unit 4. 4b is an aeration pipe. That is, the aeration unit 4
Will be formed in contact with water through the biofilm tank 2.

Next, the first biofilm layer 2a having an aerobic microbial environment is provided on the side of the biofilm tank 2 far from the aeration section 4.
And a second biofilm layer 2b having an anaerobic microbial environment is formed on the side close to the aeration section 4.

The first biofilm layer 2a is formed on the upper part of the basket-shaped tank 4 and has a block-shaped microbial contact material 5 inside.
Is filled. As the block-shaped microbial contact material 5, those having a high porosity and a high microbial adsorption rate are preferable, and, for example, Bios (trade name, manufactured by Nichinan Sangyo Co., Ltd.) and the like are suitable. Bios has a diameter of 100 to 1 by combining plate-like bodies.
It is formed as a spherical block of about 50 mm,
Since the porosity is as high as 97%, an aerobic environment is created and the surface area is as large as 60 m ² / m ³ ,
Water pollutants such as organic substances, SS substances, BOD (COD) substances, and nutrient salts contained in water are well adsorbed to form a living environment in which aerobic microorganisms can be activated.

The second biofilm layer 2b is the first biofilm layer 2a.
Are continuously formed, and a large number of cord-shaped or noren-shaped microbial adsorption cloths 6 are hung and arranged therein. As the microorganism adsorbing cloth 6, a cloth material having a microorganism adsorbing function cut into a string may be used. Examples of such cloth material include ACF (trade name of Osaka Gas) and PCX. ACF is made of carbon fiber, and P-C-X is a product having a pyridinium group and a water-insoluble or sparingly soluble microorganism-adsorbing resin attached to the surface of the porous substrate. Non-woven fabric, woven or knitted fabric made of fibers such as cotton, cotton, polyethylene and polypropylene,
It is preferable that the film is a porous synthetic resin film such as polyethylene or polyvinyl chloride, which is formed into a band-like or string-like form so that it can be easily floated in the water. Any microorganism-adsorbing resin may be used as long as it has a halogenated pyridinium group in its molecule and is insoluble or hardly soluble in water. For example, a polymer compound obtained by copolymerizing 4-vinylpyridine and a monovinyl monomer disclosed in JP-A-3-154417 and quaternizing with a halide, or 4-containing a porous substrate surface After the vinyl pyridine and the crosslinkable divinyl monomer are attached, they are copolymerized 4
Examples include graded products. Microbial adsorption capacity of these microbial adsorption resin, the pyridinium group that the resin has in the molecule is positively charged,
Generally, the cell surface of microorganisms is negatively charged,
It is presumed that it is expressed by the electrical interaction between these pyridinium groups and the microorganism. Unlike ordinary contact base materials, P-C-X has the ability to adsorb microorganisms 60 to 600 times and has the property of not releasing adsorbed microorganisms. Therefore, the microorganism adsorption cloth 6 adsorbs the microorganisms at a high density.

Further, a sludge basin 7 is provided below the biofilm tank 2, and a suction pump P2 is connected to the sludge basin 7. In addition, P3 is a watering pump.

In addition to the above-mentioned device, a water supply line 8 is connected from the sprinkler a to the water storage tank 1, a water sprinkling line 9 is connected to the water storage layer 1, and a water level switch is installed. Is configured.

In the above structure, useful microorganisms are regularly administered to the biofilm tank 2 to operate the aeration device. As a result, as aeration is performed from the tip of the aeration pipe 4b, a rising water flow is generated in the aeration unit 4, and this water flow flows over the water-blocking sheet 3 and reaches the facing wall 1a. On the other hand, as the water in the aeration unit 4 rises, the water in the biofilm tank 2 is changed to the aeration unit 4
Is sucked in. Therefore, the water that has reached the facing wall 1a of the water storage tank 1 flows downward into the biofilm tank 2, passes through the biofilm tank 2, and returns to the aeration unit 4 again. In this way, the pond water becomes an upward flow from the aeration unit 4, descends in the pond, passes through the biofilm tank 2 and returns to the aeration unit 4 again, so that a circulating flow of water is generated in the pond.

As the useful microorganism, it is preferable to use BSK bacteria (registered microorganism). Since BSK bacteria are active in both aerobic and anaerobic environments and have a high organic matter decomposing function and denitrifying function, they also have a phosphorus removing function, so decarbonization,
This is because denitrification can be performed with high efficiency, and it also has a function of producing a proteolytic enzyme and maintaining a good environment. In addition, BSK bacteria are also excellent in phosphate uptake, deodorization, and decomposition of chemical substances such as pesticides. Furthermore, in the aquatic environment, mineralization of organic nitrogen precedes, so that carbon supply as an energy source is expected to be delayed, and BSK bacteria that rapidly decompose organic matter play a large role.

In order to make the action of useful microorganisms more active, water pollutants alone are insufficient as an energy source. Therefore, it is preferable to supplement carbon sources such as ethanol and glucose separately to provide microorganisms with a stable living environment.

Further, denitrifying bacteria and phosphoric acid accumulating bacteria may be appropriately selected and supplied. A typical denitrifying bacterium is Achromob
acter, Alcaligenes, Bacillu
s, Hypomicrobium, Micrococc
us, Paraacoccus, Pseudomona
s, Thibacillus, and the like. In addition, examples of the phosphate-accumulating bacteria include PAB4 (registered microorganism). These denitrifying bacteria and phosphoric acid-accumulating bacteria may be supplied by encapsulating seed bacteria.

In order to make the activity of the useful microorganisms more active, water pollutants alone are insufficient as an energy source. Therefore, it is preferable to supplement carbon sources such as ethanol and glucose separately to provide microorganisms with a stable living environment.

By the way, when the water circulates in the water storage tank 1, the water in the aeration unit 4 rises and the wall 1 facing the water storage tank 1 is raised.
The water reaching a becomes a downward flow, and first, the first biofilm layer 2
Enter a. Since water freely flows through the block-shaped microbial contact material 5 that constitutes the first biofilm layer 2a, an aerobic hydrosphere that does not clog is formed, and when useful microorganisms are supplied to the inside, these microorganisms Is adsorbed on the contact material 5,
Solid organic substances contained in pollutants of river water, SS substances, B
Since OD (COD) substances and nutrients are ingested as energy sources, a biofilm with one ecosystem is formed. In this biofilm, useful microorganisms carry out active growth activity while consuming a large amount of the energy source. By the biochemical reaction at this time, the polluted organic substance is biodegraded into carbon dioxide gas and water, and carbon in the pollutant becomes carbon dioxide gas and is removed to the atmosphere.

Carcasses of microorganisms, hardly decomposed / undecomposed organic substances, and peeled sludge generated in the first biofilm layer 2a are gradually settled and accumulated in the sludge basin 7.

Next, the water passes through the first biofilm layer 2a and migrates to the second biofilm layer 2b, but the second biofilm layer 2b.
Since the dissolved oxygen is consumed by the high-density microbial biomass fixed on the string-shaped microbial adsorption cloth 6 provided inside, the second biofilm layer 2b is always an anaerobic microbial environment suitable for denitrification. Is formed.

The denitrifying bacteria, under anaerobic conditions, have nitric acid or nitrous acid present, and when a suitable carbon source is present, start breathing nitric acid vigorously and cause a biochemical reaction to reduce nitric acid and nitrous acid to nitrogen gas. In this case, the organic matter changes from a suspended state to a dissolved state in which nitrate and nitrite nitrogen are dissolved, and C /
Denitrification activity is exhibited when the N ratio becomes 4.
Then, denitrification is instantaneously performed if an anaerobic microbial environment and a carbon source are supplied. Therefore, in the second biofilm layer 2b, by using a bacterium having a high organic matter decomposing ability such as BSK bacterium, the organic matter in water is changed to a dissolved organic substance, and a carbon source such as ethanol or glucose is appropriately used. It is preferable to supplement the nitric acid respiration of the denitrifying bacteria to provide a stable living environment for microorganisms. Nitric acid respiration is actively performed with the growth activity of denitrifying bacteria having a denitrifying function, and nitrate nitrogen contained in pollutants in water is reduced to nitrogen gas by the nitric acid respiration of denitrifying bacteria and instantaneously from the hydrosphere to the atmosphere. Will be removed. Nitrate nitrogen dissolved in water is NO ₃ −
It is denitrified by gasifying nitrogen like N ₂ O-N ₂ .

Note that denitrifying bacteria such as BSK bacteria can grow under both aerobic and anaerobic conditions, and even under mixed aerobic and anaerobic conditions, the oxygen condition is 1.0 to 1. 3g O
It has been confirmed that both nitrification and denitrification occur at about ₂ · gCOD ⁻¹ .

Thus, organic matter in water, SS substance, B
Most of pollutants such as OD (COD) substances and nutrients are digested and absorbed as metabolic energy sources of microorganisms, and some of them are oxidized or reduced by microorganisms to decarbonize and denitrify. It remains as sludge. Therefore, most of the organic substances are reduced and phosphorus is concentrated in the sludge. Phosphorus is an essential element for the growth of organisms and the production of energy substances, but microorganisms have generally been reported to excessively ingest phosphorus. Therefore, the aerobic microorganisms grown in the contact material 5 of the first biofilm layer 2a ingest phosphorus and the substances contained in water when the denitrifying bacteria, which are heterotrophic bacteria, grow in the contact material as described above. As a nutrient source, carbon and phosphorus are taken in, whereby a part of phosphorus is fixed to the organism. Moreover, the microorganisms that have taken up phosphorus serve as a nutrient source for larger protozoa and the like, and the protozoa and the like are assimilated and catabolized by the food chain that is digested and absorbed by larger organisms. The same applies to BOD substances, SS substances, etc. contained in wastewater. Therefore, the amount of sludge generated is very small. In addition, since phosphorus is accumulated in a high concentration in the sludge that is peeled off and dropped from the first biofilm layer 2a and the second biofilm layer 2b, the phosphorus is efficiently removed by removing it. be able to. The phosphorus can be easily removed by a suction pump P2 provided in the sludge basin 7. Phosphorus can be reused as phosphorus feed.

As described above, in the water purification device, the first biofilm layer 2 having an aerobic microbial environment in the water of the water storage tank 1 is used.
Since a and the second biofilm layer 2b having an anaerobic microbial environment are continuously formed, an aerobic and anaerobic artificial microbial environment can be constructed by making good use of the natural environment. . Then, an ecosystem in which a wide variety of microorganisms are activated is formed, biochemical reactions are promoted, efficient decarbonization and denitrification are achieved, and phosphorus along with sludge can be efficiently removed from the hydrosphere. , The sprinkling can be satisfactorily purified. Further, in the above microbial environment, organic substances are energized by a long food chain such as symbiosis, parasitism, and predation, the purification efficiency is very high, the amount of sludge is small, and management is very easy.

As described above, according to the above-mentioned purification apparatus, the power consumption required for aeration is small and the aeration is also used as circulation energy, so that the energy consumption required for purification is small. And not only decomposition of organic matter but also denitrification
By dephosphorization, extremely high quality water will be produced, turfgrass can be grown healthy, pesticides can be reduced and pollution of the environment of the discharge destination can be prevented, and use of medium water is also possible. can do. Moreover, phosphorus can be removed efficiently and can be taken out of the system and reused as phosphorus feed.

In addition, since it is biologically purified, it can be purified in the water tank 1, maintenance is easy, and a large device outside the water tank 1 is not required, so that the aesthetic appearance of the golf course is not impaired. , Does not hinder play.

The first biofilm layer 2a is formed by filling the inside of the basket-like tank 4 with a block-shaped microbial contact material 5, and the second biofilm layer 2b is above the basket-like tank 4. Since a large number of string-shaped non-woven fabrics for adsorbing microorganisms 6 are arranged in the inside, it is possible to create the best artificial microbial environment currently conceivable.

Experimentally, the amount of water in the water tank 1 is about 800 m.
^In the case of ³ , 20 to 30 turns / day can be purified by a blower (aeration device) of about 1.5 Kw. Since the aeration unit 4 needs only about 1.0 m ² , it consumes little electric power, and since it is also used as circulation energy, the energy consumption required for purification is small.
And, by circulation of up to about 30 times a day, not only decomposition of organic matter but also denitrification and dephosphorization will produce extremely high quality water, which enables healthy growth of turfgrass.
Agricultural chemicals can be reduced to prevent pollution of the environment where they are released, and it is also possible to use reclaimed water. Moreover, phosphorus can be removed efficiently and can be taken out of the system and reused as phosphorus feed.

The structure of the water purifier is not limited to the above. For example, the aeration unit 4 may be configured as shown in FIG. 3, or the aeration unit 4 may be formed at the center of the water storage tank 1 as shown in FIG. Reference numerals in the figure indicate the same parts as those in FIGS.

The above-mentioned example is an example of a water purifying apparatus for a grass lawn watering pond of a golf course, but the water purifying apparatus can be applied to a farm for shrimp and the like, a septic tank for factory wastewater, and the like.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view of a water purification device for a water tank of a golf course according to the present invention.

FIG. 2 is a cross-sectional view of the water purification device of FIG.

FIG. 3 is a plan view of another example of the water purification device.

FIG. 4 is a plan view of still another example of the water purification device.

[Explanation of symbols]

 1 Water Reservoir 1a Wall 2 Biofilm Tank 2a First Biofilm Layer 2b Second Biofilm Layer 3 Impermeable Sheet 4 Aeration Part 7 Sludge Cell

Claims (3)

(57) [Scope of utility model registration request] 1. A biofilm tank is installed so as to come into contact with a wall of a water storage tank, a waste water purification tank, etc., and an aeration part is formed between the biofilm tank and the water surface and the wall of the water storage tank. Forming a first biofilm layer having an aerobic microbial environment on the side farther to the aeration part, and forming a second biofilm layer having an anaerobic microbial environment on the side closer to the aeration part, A water storage tank characterized in that the upper part of the biofilm tank is arranged slightly below the water surface of the water tank, the upper part of the biofilm tank is covered with a water-blocking sheet, and a sludge box is provided at the bottom of the biofilm tank. , Water purification equipment such as wastewater septic tank. 2. The water storage tank according to claim 1, wherein the biofilm tank is arranged in the center of a water storage tank, a waste water purification tank or the like instead of the wall, and the aeration section is formed in the center of the biofilm tank. , Water purification equipment such as wastewater septic tank. 3. The first biofilm layer is formed by filling a block-shaped microbial contact material inside the basket-shaped tank, and the second biofilm layer is string inside the basket-shaped tank. A water purification device such as a water storage tank or a waste water purification tank according to claim 1 or 2, wherein a large number of microbe-adsorbed nonwoven fabrics are arranged.