JP2007007603A - System for purifying water quality - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a system for purifying water quality enabling combined use of physical treatment, biological purification and water quality maintenance management. <P>SOLUTION: The system comprises combined installation of each of a water quality quick purification device 2 using artificial zeolite for activating water quality by supplying mineral, a biofan water cultivation device 3 causing circulation flow between water surface and water bottom as biological purification by an aerobic microbe, and an ultrafine air bubble generator 4 for growing the aerobic microbe by generating an ultrafine air bubble which is magnetically activated and has a size of 3 μm or smaller. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a water purification system for efficiently performing a wide range of water quality improvements.

Conventionally, as this type of purification treatment method, a biological purification treatment method (for example, Patent Document 1) that causes microorganisms to eat and decompose pollutants, and a physical treatment method (for example, a method for coagulating and precipitating contaminants using charges) (for example, Patent Document 2), an aeration process method (for example, Patent Document 3) that promotes the activity of microorganisms by increasing dissolved oxygen in water, and a plant treatment system (for example, Patent Document 4) that absorbs and removes contaminants using aqueous plants.
JP-A-5-296 JP 2003-31288 A JP 2002-35781 A Japanese Patent Laid-Open No. 10-263589

  However, in the conventional purification treatment method, the biological purification treatment method is affected by the climate and water temperature because of the microorganism treatment, and the effect is uneven. In the aeration treatment method, water is agitated and there is little expectation for purification. For example, bubbles produced by a conventional blower method or bubble generator have a large diameter, and the residence time in water is instantaneously released to the atmosphere in a short time. Therefore, bubbles having a large diameter and a short residence time in water have a short chance of contact between air and water, so there is no time for oxygen to dissolve in water. In addition, the conventional aeration method alone is merely a stirring action of water, and has almost no effect on dissolved oxygen. In addition, the plant treatment method is an inexpensive method for natural purification, but cannot function during the winter season. Of these, only the physical treatment method is effective for rapid purification and is best for shortening the construction period.

  Therefore, the present invention was created in view of the existing circumstances as described above. In order to efficiently improve a wide range of water quality, it is possible to combine physical treatment, biological purification, and water quality maintenance management. The purpose is to provide an improved water purification system.

In order to solve the above-described problem, the water purification system according to claim 1 according to the present invention uses a water quality activator using artificial zeolite for water quality activation by supplying minerals, and for instantaneous flocification of polluted water. A water quality rapid purification device using a non-aluminum aggregation promoter, a biofan cultivating device for generating a circulating flow between the water surface and the bottom as a biological purification by aerobic microorganisms, and magnetically activated 3 It is characterized in that it is used in combination with an ultrafine bubble generator for generating aerobic microorganisms by generating ultrafine bubbles of micron or less.
The water purification system according to claim 2 is the invention according to claim 1, wherein the rapid water purification device includes a water absorption pump for pumping up polluted water, a pressure-feeding agitation pump and a reaction layer, and instantaneous flocking of the polluted water. An automatic inorganic activator supply device using an agglomeration accelerator, a floc-generating layer, a blower, a cylindrical filter made by blowing the water-based activator into the inside made of a blown-out mesh resin, and sludge suction A pump, a sedimentation tank, and a sludge dewatering device can be used.
The water purification system according to claim 3 is the invention according to claim 1, wherein the biofan tillage device is attached to a central rotation drive unit provided with a solar panel for solar cell charging, and the rotation drive unit. Thus, it is possible to construct a watering blade whose number of revolutions per minute is changed from one low speed to five quasi-high speeds.
A water purification system according to a fourth aspect of the present invention is the invention according to the first aspect, wherein the ultrafine bubble generating device comprises a pressure feed pump, an oxygen suction part, and a nozzle having a ferromagnetic material at the discharge port. Can do.
The water purification system according to claim 5 is the invention according to claim 1 or 2, wherein the non-aluminum instantaneous flocculant is Cinderellite (registered trademark) S.

  In the water purification system according to the present invention configured as described above, the water quality rapid purification apparatus is a non-aluminum Cinderellite S as an inorganic activator, etc. And agglomeration accelerators are instantly separated into clear water and floc. This primary treated water is sent to the floc generating layer to further generate pollutants into stronger flocs, and the generated floc and clarified water are fed into a blown cylindrical filter in water. This blow-off cylindrical filter separates treated water into floc and clarified water, and releases only clarified water into the water through the cylindrical filter. At this time, the water quality activator by the artificial zeolite thrown into the cylindrical filter supplies minerals to the clarified water to activate it.

  The biofan cultivator cultivates water by gently rotating the water scraping blades that are spread and floated in the direction of the water surface within the range of 1 rotation of low speed to 5 rotations of quasi-high speed, In the water, a flow tube having a spread proportional to the length R of the water scraping blade is formed. Water flows inside the flow tube and rises, spreads in the water surface direction, and is exposed to the sun and the wind. The water that has obtained oxygen on the surface of the water returns to the bottom of the water, converges at the starting point of the original flow even if it flows over the bottom of the water from a distance of 40 times the length R of the water scraping blade, and repeats circulation. That is, oxygen-free water covering sludge deposited on the bottom of the water is guided to the surface of the water, and water on the surface of high demand oxygenogen DO is sent to the bottom of the water, thereby causing a laminar flow due to the viscosity of the water.

  The ultrafine bubble generator draws oxygen from the oxygen suction part by the operation of the pressure pump and generates ultrafine bubbles of 3 microns or less from the discharge port of the nozzle. At this time, the water cluster is made into a single molecule by the magnetic effect of the ferromagnetic material provided in the discharge port of the nozzle to generate active water with high dissolving power and osmotic power, and the bubbles are well dissolved in the water to reduce the dissolved oxygen concentration. Increase it. The ultrafine bubbles of 3 microns or less generated from this nozzle have a large specific surface area, and the ascending speed is very slow, for example, 12 mm / min, and the residence time in water is long, so that oxygen is efficiently dissolved in water. For this reason, dissolved oxygen can be increased and the reproduction of aerobic microorganisms can be promoted, and organic substances are decomposed into inorganic substances by these microorganisms. Moreover, it is charged by the polarization action of the ultrafine bubbles themselves, and after the virus is attracted by electrostatic force, the virus is destroyed by free radicals generated when the bubbles disappear.

  ADVANTAGE OF THE INVENTION According to this invention, in order to perform a wide range of water quality improvement efficiently, the water quality purification system which enabled combined use of physical treatment, biological purification, and water quality maintenance management can be provided.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings. Reference numeral 1 shown in the drawing represents the configuration of a water purification system according to the present invention. For supplying minerals into the water by, for example, a blow-off method using a water quality activator such as artificial zeolite containing aluminum oxide as a component, and separating the contaminated water sucked from the bottom into clear water, floc and sludge Laminar flow that generates a circulating flow between the water surface and the bottom of the water as a biological purification by aerobic microorganisms based on a self-cleaning action, and a water quality rapid purification device 2 using an instantaneous flocculant such as non-aluminum Cinderellite S Biofan cultivator 3 for improving the water quality by supplying oxygen to the bottom of the water by using the principle to improve the water quality, and magnetically activated Ultrafine bubble generator 4 for maintaining and managing water quality by growing aerobic microorganisms by generating a large amount of ultrafine bubbles (microbubbles) having a diameter of about 0.5 to 10 microns and a large amount of 3 microns or less. The system is configured by using both together.

  As shown in FIG. 2, the water quality rapid purification device 2 by the blow-off system includes a water absorption pump 2A for pumping up polluted water, a pressure stirring pump 2B and a reaction layer 2C, and an inorganic activator automatic supply device 2D for instantaneous floc formation. And a floc generation layer 2E, a blower 2F, a cylindrical filter 2G made of a mesh resin in the shape of an underflow, a sludge suction pump 2H, a sedimentation tank 2I, and a sludge dewatering device 2J. . At this time, the cylindrical filter 2G is connected in series in a blow-off shape by, for example, several joint buckles or the like equipped at both ends, and these are installed in parallel, and the cylindrical filter 2G is supplied with minerals. For example, a water quality activator such as artificial zeolite is used for water quality activation.

  Next, the use and operation of the water quality rapid purification apparatus 2 will be described. For example, when there is a large amount of sedimentation sludge accumulated at the bottom of the water, the polluted water pumped up by the suction pump 2A is sent to the reaction layer 2C for inorganic activity. An automatic flocculant such as non-aluminum Cinderellite S which does not use any sulfate or aluminum sulfate as an inorganic activator is charged by the automatic agent supply device 2D and simultaneously stirred by the pressure feed stirring pump 2B. At this time, the contaminated water is instantaneously separated into clear water and floc as a primary treatment. This primary treated water is sent to the floc generating layer 2E, and further generates pollutants into stronger flocs. The generated floc and clarified water are fed into a submerged cylindrical filter 2G by a pump. The cylindrical filter 2G in the water separates the treated water into floc and clarified water, and releases only the clarified water into the water through the cylindrical filter 2G. At this time, a large amount of mineral is supplied to the clarified water by the water quality activator such as artificial zeolite charged in the cylindrical filter 2G. The flocs are transported through the cylindrical filter 2G to the rear by a water flow, and the flocs and a part of the wastewater transported to the rear are sent to the dewatering device 2J by the sludge suction pump 2H, dehydrated and collected as sludge cake. After that, it is disposed of or reprocessed as a secondary product.

  The above-mentioned instantaneous flocculant is added with a small amount of Cinderellite S as an auxiliary agent by forcibly applying a charge at a high pressure to a substance as a special base material for the purpose of improving the aggregation rate and generating strong floc. The Cinderellite S has, for example, pH 6.7, high specific gravity and water insolubility, and its components and contents are 41.4% sulfur trioxide, 29% calcium oxide, and 15.1 silicon dioxide. %, Dialuminium trioxide 9.2%, Ferric trioxide 2.1%, Sodium oxide 1.3%, Potassium oxide 0.9%, Magnesium oxide 0.5%, Titanium dioxide 0.2% is used.

  Further, as an inorganic water quality activator charged into the cylindrical filter 2G, an artificial zeolite containing silicon oxide and aluminum oxide as a composition is used. This artificial zeolite is porous, has a large specific surface area by reacting coal ash with alkali, has the property of adsorbing and holding various substances, and supplies minerals generated by its own ion exchange function into water. It is assumed that the activation of water quality can be achieved. This artificial zeolite is known to be rich in minerals, for example, sodium type, calcium type, potassium type, magnesium type, aluminum type, iron type and the like.

  As shown in FIG. 4, the specific configuration of the biofan tillage device 3 includes three pieces attached at every 120 ° angle from the central rotational drive unit 3A in which the solar panel 3C for solar cell charging is disposed. It is comprised so that the water scraping blade 3B may rotate slowly on the water surface. At this time, in order to prevent the biofan cultivator 3 itself from rotating backward due to the reaction caused by the rotation of the water scraping blade 3B, a horizontally long support rod is projected at the lower center of the biofan cultivator 3 and both ends of the support rod are roped. It connects with the anchor installed in the bottom of the water. When the ultrafine bubble generating device 4 is provided together with the biofan tillage device 3, for example, a plurality of nozzles 4C described later of the ultrafine bubble generating device 4 are attached along the anchor portion.

  Further, when the water area is large, as shown in FIG. 5, a solar panel S for charging solar cells is disposed on the roof of the water deck, and the rotation drive unit 3A at the center of the lower submerged portion of the water deck A plurality of water quality rapid purification devices 2 using a biofan tillage device 3 in which three watering blades 3B mounted at every 120 ° are arranged, and a blow-off cylindrical filter 2G installed on the peripheral side of the water deck It is set as the structure which used together. At this time, when the water depth is several tens of meters or more and the amount of demand oxygenogen DO is large, the ultrafine bubble generating device 4 is not used because it does not exert its power. Is shallow and the amount of demand oxygen DO is small, it is also possible to install the ultrafine bubble generator 4 on the lower side of the watering blade 3B.

  Next, the principle of water purification by the biofan cultivator 3 will be explained. When water scraping blades 3B spread and floated in the direction of the water surface are gently rotated at low speed or semi-high speed to cultivate the water, the water near the water surface is retreated to the surroundings. The so-called artificial uplift effect in which the water is pushed up from the bottom so as to compensate for the retreated water forms a flow tube that expands in proportion to the length R (rotation radius) of the watering blade 3B in the water, Water flows up inside this flow tube, which is shaped like Mt. Fuji, spreads in the direction of the water surface, and is exposed to the sun and wind. The water that has obtained oxygen on the water surface returns to the bottom of the water and converges at the starting point of the original flow even if it flows over the bottom of the water from a distance 40 times longer than the length R of the water scraping blade 3B and repeats circulation. That is, the oxygen-free water covering the sludge accumulated on the bottom of the water is guided to the surface of the water, and the water with a high demand oxygen DO is sent to the bottom of the water, thereby causing a laminar flow due to the viscosity of the water.

  In this way, waves are generated on the water surface to rotate the surface water vertically, increasing the contact between the wind and water, and organic components such as odors that have been reduced in molecular weight by the action of microorganisms are exposed to the water surface by rotation. To remove the malodorous water. Moreover, the dissolved oxygen concentration of surface water is raised by the contact of water exposed to the water surface by rotation and air. Furthermore, the water exposed to the water surface by rotation is irradiated with visible light from sunlight, nitrogen and phosphorus are removed by growth of phytoplankton, oxygen is produced by photosynthesis, and by irradiation with ultraviolet rays of sunlight, Aggregating flocs of pollutants and elimination of E. coli and bad bacteria are performed.

The area of the water area where the purification effect can be obtained is S square meter, the average water depth is H meter, the amount of water cultivated by the biofan cultivator 3 used is M cubic meters per minute, and the water purification effect is obtained. S = {So (Ho / Mo) ² } (M / H) ^2, where Ho is the water depth and the amount of water cultivated by the biofan cultivator 3 used is Mo cubic meters per minute.

In addition, the installation condition of the biofan tillage device 3 is the first condition. As a second condition, the average water depth H meter of the purification target water area is 8πEσρεnηP / 3 gS or less. As a third condition, the area S square meter of the water area to be purified should be K (nM / H) ² or less. Here, n is the number of biofan tillage devices 3 used, P is the drive motor output, σ is the specific heat of water, ρ is the average density of water, g is the acceleration of gravity, M is the amount of water cultivated by the biofan tillage device 3, η is the efficiency of the speed reduction mechanism, ε is the structure coefficient of the water scraper blade 3B, and β ² (1-α ³ ): α = r / R, β = W / R (see FIG. 4).

  For example, in the case of R = 750 mm and P = 25 W, the specific rotation speed of the three water blades 3B in the biofan cultivator 3 is 5 rotations / min, R = 1500 mm, P = 60 W. In this case, the rotation speed is 3 rotations / min. In the case of R = 1900 mm and P = 90 W, the rotation speed is 2.5 rotations / min. In addition, when the area S square meters of the water area to be purified has a large area such as Lake Biwa, the number of water scraping blades 3B with R = 2.5 m is minimized. Therefore, at least three. Further, it is preferable to set the rotation speed to 1.64 rotations / min with a drive motor output of P = 200 to 300 W. Needless to say, the number of webs 3B is not intended to limit the present invention, and three or more may be used.

  Moreover, according to the comparative experiment example by the water quality test with and without the biofan cultivator 3, 3 mg / l of BOD is 2.2 mg / l when used (weighing method JIS K0102). -21), 11 mg / l of COD becomes 8 mg / l (weighing method JIS K0102-17), PH8.4 becomes PH8.5 (weighing method JIS K0102-12-1), and SS13 mg / l becomes 2 mg / l. (Weighing method JIS K0102-14-1), 0.84 mg / l of total nitrogen is 0.52 mg / l (weighing method JIS K0102-45-2), and 0.33 mg / l of total phosphorus is 0.14 mg / L (weighing method JIS K0102-46-3), and 3.98 mg / l of iron is 1.40 mg / l (weighing method JIS K0102-57-2) Next, 0.12 mg / l of manganese is 0.04 mg / l (weighing JIS K0102-56-2). Further, the transparency is changed from 10 degrees to 20 degrees (measurement method JIS K0102-9), the turbidity is changed from 24 degrees to 12 degrees (measurement method JIS K0101-9-4), and the chromaticity is changed from 64 degrees to 33 degrees (measurement method). JIS K0101-1-10-1), and the decay of the bottom of the water has been eliminated.

In addition, regarding the uniformity of the temperature and dissolved oxygen of the surface layer and bottom layer water by the biofan cultivator 3, as a result of the experiment, the water temperature (about approx. 30 ° C.) and oxygen concentration (about 10 ppm) are substantially constant regardless of water depth.
That is, in the case of a pond with an average water depth of 2.5 m and an area of 10,000 m ² , and a biofan is not used, the water temperature suddenly rises from 30 to 32 ° C. with a water depth of 10 to 25 cm, and from 25 to 70 cm Constant 32 ° C. The temperature gradually decreases from 100 cm, and reaches a temperature of 29 ° C. at a water depth of 250 cm. Further, when the water depth becomes deeper than 150 cm, the oxygen concentration gradually decreases from 14 ppm.

On the other hand, when three biofans are used, the water temperature is about 30 ° C., which is substantially constant regardless of the water depth, and the oxygen concentration is also about 8 ppm, regardless of the water depth.
In addition, when five biofans are used in a pond with an average water depth of 5 m and an area of 71000 m ² , the water temperature remains unchanged at 30 ° C. and the PH is 8 between the water depths of 0.2 m to 4.5 m immediately below one biofan. Demand oxygenogen DO is substantially constant at 7.0 to 6.8 mg / L, unchanged from 0.7 to 8.6.

  At a point of 5.6 m from one biofan, the water temperature is almost 30 ° C. and the pH is 8.6 to 8.5 at a water depth of 0.2 m to 5.8 m, and demand oxygenogen DO is 7 Decrease slightly from 3 mg / L to 6.2 mg / L.

  When the maximum water depth is 6.6 m, the pH is 8.8 at a water depth of 5.7 m, but suddenly decreases to a pH of 7.3 at a water depth of 6.2 m, and slightly decreases to a pH of 7.2 at a water depth of 6.6 m. In addition, DO is 6.8 mg / L at a water depth of 5.7 m, but rapidly decreases to 0.3 mg / L at a water depth of 6.2 m.

  As shown in FIG. 3, the ultrafine bubble generator 4 is generally composed of a pressure pump 4A, an oxygen suction part 4B, and a nozzle 4C having a ferromagnetic body 4D of about 4500 gauss at the discharge port. The so-called microbubbles of 3 microns or less generated at this time have a large specific surface area, and the ascending speed is very slow, for example, 12 mm / min, the residence time in water is long, and oxygen is efficiently consumed. It's something that melts into the water. For this reason, dissolved oxygen can be increased and reproduction of aerobic microorganisms can be promoted. In addition, the magnetic effect of the ferromagnetic material 4D makes the water cluster unimolecular, generating active water with high dissolving power and penetrating power, and bubbles dissolve well in the water to increase the dissolved oxygen concentration. While aerobic microorganisms are grown, organic substances are decomposed into inorganic substances by these microorganisms.

  In particular, aerobic microorganisms decompose bottom mud, release nitrogen as a gas, and fix phosphoric acid as an insoluble solid. Further, such ultrafine bubbles of 3 microns or less are charged by their own polarization, and can be destroyed by free radicals generated when the bubbles disappear after attracting the virus by electrostatic force. Instead of using the ultrafine bubble generating device 4, a nanobubble generating device may be used.

It is a block diagram which shows the best form for implementing this invention. It is a flow block diagram of a water quality rapid purification apparatus similarly. It is a system configuration diagram of the same ultrafine bubble generator. It is a side view of a biofan tillage device. It is explanatory drawing which shows an example at the time of using together a biofan water cultivating apparatus and a water quality rapid purification apparatus.

Explanation of symbols

1 Water purification system
2 Rapid water purification device 3 Biofan cultivator 4 Ultra fine bubble generator

Claims (5)

  Water quality rapid purification device using water quality activator by artificial zeolite for water quality activation by mineral supply and non-aluminum aggregation promoter for instant flocification of polluted water, and aerobic microorganism Biofan tillage device that generates a circulating flow between the water surface and the bottom of the water as a biological purification, and an ultrafine bubble generator that grows aerobic microorganisms by generating magnetically activated ultrafine bubbles of 3 microns or less A water purification system characterized by being combined with each other.   The water quality rapid purification apparatus includes a water absorption pump for pumping up polluted water, a pressure-feeding agitation pump and a reaction layer, an automatic inorganic activator supply device using an agglomeration accelerator for instantaneous flocking of polluted water, a floc generating layer, And a blower, a cylindrical filter formed by introducing the water quality activator into a blowout mesh resin in water, a sludge suction pump, a sedimentation tank, and a sludge dewatering device. 1. The water purification system according to 1.   The biofan cultivator includes a central rotation drive unit provided with a solar panel for charging a solar cell, and a rotation speed per minute that is attached to the rotation drive unit, ranging from a low speed of 1 rotation to a quasi-high speed of 5 The water purification system according to claim 1, wherein the water purification system is composed of a rotating watering blade.   2. The water purification system according to claim 1, wherein the ultrafine bubble generating device includes a pressure feed pump, an oxygen suction unit, and a nozzle having a ferromagnetic body at a discharge port. 3. The water purification system according to claim 1, wherein the non-aluminum instantaneous flocculant is Cinderellite (registered trademark) S. 4.

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