JP2011025200A - Method and apparatus for treating water - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and an apparatus for treating water, capable of attaining oxidative decomposition of an organic matter, oxidative decomposition of a difficult-to-resolve compound in wastewater, oxidization of ammoniac nitrogen and the like by improving the activity of useful bacillus. <P>SOLUTION: With the water treatment apparatus, a microorganism activity portion 58 supplies micro nano bubble water containing useful microorganism activated by coarse micro nano bubble and fine micro nano bubble to at least one of a contact adjustment tank 2 and a catalytic oxidation tank 9 through water piping 14 from a microorganism culture tank 27. The activated useful microorganism and coarse and fine micro nano bubbles can enhance the water treatment capacity of the water treatment portion 57 composed of the contact adjustment tank 2, the catalytic oxidation tank 9, a circulation pump tank 15 and a discharge pump vessel 20. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a water treatment method and a water treatment apparatus.

  Conventionally, the use of useful bacteria in wastewater treatment equipment is limited to wastewater containing a relatively large amount of oil (measured as normal hexane extract), such as hotel kitchen wastewater and wastewater from food factories. Has been used. In other words, in these wastewater treatment apparatuses, microorganisms that decompose oils and fats are introduced into adjustment tanks, aeration tanks, or contact oxidation tanks, and oils and fats, organic substances, and the like are efficiently decomposed in a comprehensive manner.

  Incidentally, a water treatment method and a water treatment apparatus using micro-nano bubbles as a conventional technique are disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 2008-36518). In this conventional technology, micro-nano bubbles are mixed with water to be treated containing fats and oils and introduced into a pressurized levitation tank, and both suspended substances and ultrafine suspended substances in the treated water are floated in the pressurized levitation tank. The content to be separated. Therefore, in this prior art, since the water to be treated and the micro / nano bubbles are mixed in the previous stage of the pressurized levitation tank, compared with a general pressurized levitation tank, an ultrafine suspended substance containing fats and oils is also contained. The advantage of being able to float and separate in a pressurized flotation tank is disclosed.

  Patent Document 2 (Japanese Patent Laid-Open No. 2004-121962) discloses a method and apparatus for using nanobubbles as a conventional technique. This technology utilizes the characteristics of nanobubbles such as reduction of buoyancy, increase of surface area, increase of surface activity, generation of local high-pressure field, and surface active action and bactericidal action by realizing electrostatic polarization. More specifically, by interlinking them, various objects can be washed with high functionality and low environmental load by the adsorption function of dirt components, the high-speed washing function of the object surface, and the sterilization function. It discloses that purification can be performed.

  Patent Document 3 (Japanese Patent Application Laid-Open No. 2003-334548) discloses a nanobubble generation method as a conventional technique. In this technique, in a liquid, (1) a step of cracking and gasifying a part of the liquid, (2) a step of applying ultrasonic waves in the liquid, or (3) a step of cracking and gasifying a part of the liquid It discloses that it is composed of a step of applying ultrasonic waves.

  Patent Document 4 (Japanese Patent Application Laid-Open No. 2004-321959) discloses a waste liquid treatment apparatus using ozone microbubbles as a conventional technique. In this technique, ozone gas generated from the ozone generator and waste liquid extracted from the lower part of the treatment tank are supplied to the microbubble generator via a pressure pump. It also discloses that the generated ozone microbubbles are vented into the waste liquid in the treatment tank through the opening of the gas blowing pipe.

  By the way, the use of useful bacteria in the above-mentioned conventional wastewater treatment equipment is a wastewater containing a relatively large amount of fats and oils (measured as a normal hexane extract) like hotel kitchen wastewater and wastewater from food factories. Has been used. In other words, in these wastewater treatment apparatuses, microorganisms that decompose oils and fats are introduced into adjustment tanks, aeration tanks, or contact oxidation tanks to efficiently and comprehensively decompose oils and fats and organic substances.

  However, in the wastewater treatment apparatus using the above-mentioned conventional useful bacteria, not only the activity of the useful bacteria is relatively low, but also the quality of the treated water cannot be remarkably improved. That is, in the conventional waste water treatment apparatus, the treatment is performed only by the action of activated sludge, which is a general microorganism aggregate, and useful bacteria, but there is a problem that the action of useful bacteria is weak. Moreover, in the wastewater treatment apparatus using the conventional useful bacteria, there is a problem that organic matter cannot be oxidatively decomposed. As a matter of course, there is a problem that only the useful bacteria cannot oxidatively decompose the hardly decomposable compound in the waste water. In general useful bacteria, the decomposition of fats and oils can be expected to some extent, but there is also a problem that oxidation of ammonia nitrogen in waste water, that is, nitrification to nitrate nitrogen cannot be performed. Moreover, in the wastewater treatment apparatus using the conventional useful bacteria, there is a problem that neither nitrification of ammonia nitrogen and treatment of nitrate nitrogen as nitrogen gas, that is, denitrification cannot be expected.

JP 2008-036518 A JP 2004-121962 A JP 2003-334548 A JP 2004-321959 A

  Accordingly, the object of the present invention is to provide a water treatment method and a water treatment apparatus capable of increasing the activity of useful bacteria to enable oxidative decomposition of organic substances, oxidative decomposition of hardly decomposable compounds in waste water, oxidation of ammonia nitrogen, and the like. Is to provide.

  In order to solve the above-mentioned problem, the water treatment method of the present invention activates microorganisms with the first micro-nano bubbles and the second micro-nano bubbles having a size smaller than the size of the first micro-nano bubbles. It is characterized by water treatment with the microorganisms.

  According to the water treatment method of the present invention, microorganisms are activated by the first and second micro-nano bubbles having different sizes, so that most of the microorganisms having different sizes can be activated, and most of the activated microorganisms are activated. The efficiency of water treatment by microorganisms can be improved. And since the micro micro-nano bubbles (second micro-nano bubbles) and the microorganisms are mixed with the water to be treated, the treatment efficiency by the activated micro-organisms is improved, and the organic matter by the free radicals of the micro micro-nano bubbles It can exhibit the oxidizing action of oil and the oxidative decomposition action of fats and oils.

  The microorganisms include both relatively large-sized microorganisms (for example, protozoa, thread earthworms, etc.) and relatively small-sized microorganisms such as bacteria. The present invention activates various microorganisms with respect to various microorganisms having different sizes by the synergistic effect of coarse first micro-nano bubbles and minute second micro-nano bubbles. The coarse first micro / nano bubbles have an action of activating microorganisms and an action of stirring the water tank. And water treatment performance can be improved comprehensively with two types of micro-nano bubbles, coarse first micro-nano bubbles and minute second micro-nano bubbles.

  Moreover, as for the water treatment method of one Embodiment, the said microorganisms contain Bacillus subtilis.

  According to the water treatment method of this embodiment, Bacillus subtilis as a microorganism is activated with two types of micro-nano bubbles, so that most of Bacillus subtilis having different sizes can be activated, and most of the activated Bacillus subtilis is activated. The processing efficiency can be improved. Then, since the minute second micro-nano bubbles and Bacillus subtilis as a microorganism are mixed with the water to be treated, the treatment efficiency by the activated Bacillus subtilis is improved and the organic substances by the free radicals possessed by the micro-micro nano bubbles are reduced. Oxidation action and oxidative decomposition action of fats and oils can be exhibited.

  In one embodiment of the water treatment method, the microorganism includes a group of microorganisms mainly composed of Bacillus subtilis sapolophitec.

  According to the water treatment method of this embodiment, a group of microorganisms mainly composed of Bacillus subtilis sapolophitec is activated with two types of micro-nano bubbles. The efficiency of the microbial treatment by the microbial group can be improved. Then, since the minute second micro-nano bubble and the microorganism group mainly composed of Bacillus subtilis sapolophite are mixed with the water to be treated, the microorganism group mainly composed of Bacillus subtilis sapolophite is used. The water treatment efficiency can be improved and the organic radicals can be oxidized by the free radicals of the micro-nano bubbles and the oxidative decomposition action of fats and oils can be achieved.

  In one embodiment, the water treatment method includes a group of microorganisms in which the microorganism is mainly a Cereus species.

  According to the water treatment method of this embodiment, since microorganisms containing a group of microorganisms mainly composed of Cereus species are activated by two types of micro-nano bubbles, the efficiency of microorganism treatment by the group of microorganisms composed mainly of Cereus species is improved. Can be expected.

  Moreover, the water treatment method of one Embodiment introduce | transduces the liquid containing the nutrient of the said microorganisms into a micro nano bubble generator, and generates the said 1st micro nano bubble.

  According to the water treatment method of this embodiment, a liquid containing a nutrient is introduced into the micro / nano bubble generator, and a large amount of coarse first micro / nano bubbles can be produced. , Can improve the efficiency of water treatment. Moreover, by introducing the nutrient component into the micro / nano bubble generator, a large amount of coarse first micro / nano bubbles can be generated, and as a result, water treatment efficiency can be improved. In other words, it has been found that the nutrient is a nutrient for microorganisms, but is also effective for producing a large amount of coarse micro-nano bubbles.

  Moreover, the water treatment method of one Embodiment introduce | transduces the liquid containing the nutrient of the said microorganisms into a micro nano bubble generator, and generates the said 2nd micro nano bubble.

  According to the water treatment method of this embodiment, since the liquid containing the nutrient is introduced into the micro / nano bubble generator to produce a large amount of minute second micro / nano bubbles, a relatively small microorganism is activated. Thus, water treatment efficiency can be improved. In addition, the nutrient component can be introduced into a micro / nano bubble generator to generate a reasonably large amount of micro micro / nano bubbles, thereby improving water treatment efficiency. In other words, it has been found that the nutrient is a nutrient for microorganisms, but is also effective for producing a large amount of minute micro-nano bubbles.

  Moreover, the water treatment method of one Embodiment introduce | transduces the liquid containing the said bubble generation adjuvant into a micro nano bubble generator, and generates the said 1st micro nano bubble.

  According to the water treatment method of this embodiment, it is possible to produce a large amount of coarse first micro / nano bubbles by introducing bubble generation aids (bubble aids such as minerals and surfactants) into the micro / nano bubble generator. , Can improve the efficiency of water treatment.

  Moreover, the water treatment method of one Embodiment introduce | transduces the liquid containing the said bubble generation adjuvant into a micro nano bubble generator, and generates the said 2nd micro nano bubble.

  According to the water treatment method of this embodiment, the bubble generation aid can be introduced into the micro / nano bubble generator to produce a large amount of minute second micro / nano bubbles, thereby improving the efficiency of water treatment. .

  Moreover, the water treatment method of one Embodiment introduce | transduces the liquid containing both the nutrient of the said microorganisms and a bubble generation adjuvant into the micro nano bubble generator, and generates the said 1st micro nano bubble.

  According to the water treatment method of this embodiment, both the nutrients for microorganisms and the bubble generation aid are introduced into the micro / nano bubble generator, and a large amount of coarse first micro / nano bubbles can be produced. Efficiency can be improved.

  Moreover, the water treatment method of one Embodiment introduce | transduces the liquid containing both the nutrient of the said microorganisms and a bubble generation adjuvant into the micro nano bubble generator, and generates the said 2nd micro nano bubble.

  According to the water treatment method of this embodiment, it is possible to produce a large amount of minute second micro / nano bubbles by introducing both the nutrients of the microorganisms and the bubble generation aid into the micro / nano bubble generator, The efficiency of water treatment can be improved.

Moreover, the water treatment apparatus of one embodiment includes an adjustment tank into which treated water is introduced,
A contact oxidation tank into which treated water from the adjustment tank is introduced;
A discharge pump tank for discharging treated water introduced from the contact oxidation tank to the outside;
A microorganism culture tank into which microorganisms are introduced;
An additive tank for adding at least one of the nutrients for the microorganisms and the bubble generation aid to the microorganism culture tank;
A micro-nano bubble generator for generating a first micro-nano bubble and a second micro-nano bubble having a size smaller than the size of the first micro-nano bubble and supplying the first and second micro-nano bubbles to the microorganism culture tank When,
A micro-nano bubble water supply unit configured to supply the microorganism-containing micro-nano bubble water containing the first and second micro-nano bubbles and the microorganism from the microorganism culture tank to at least one of the adjustment tank and the contact oxidation tank;

  According to the water treatment apparatus of this embodiment, the micro-nano bubble water supply unit includes a micro that contains microorganisms activated by adding at least one of the nutrients of the microorganisms and the bubble generation aid to the microorganism culture tank. Nano bubble water is supplied to at least one of the adjustment tank and the contact oxidation tank. The activated microorganisms and the first and second micro / nano bubbles can improve the water treatment capacity of the water treatment unit constituted by the adjustment tank, the contact oxidation tank, and the discharge pump tank.

Moreover, in the water treatment apparatus of one embodiment, the micro-nano bubble generator includes a vortex pump added with a gas shearing part,
A pressurized tank connected to the vortex pump;
And a surplus air tank connected to the pressure tank and having a pressure gauge attached thereto.

  According to the water treatment apparatus of this embodiment, the micro / nano bubble generator is composed of a vortex pump added with a gas shearing part, a surplus air tank attached with a pressure tank and a pressure gauge, Can be manufactured in large quantities. In particular, by using an excess air tank, micro-nano bubbles having a relatively large size (first micro-nano bubbles) can be classified and produced as excess air. Then, micronano bubbles having a relatively small size (second micronano bubbles) can be manufactured separately from micronano bubbles having a large size.

In one embodiment of the water treatment apparatus, the microorganism culture tank includes a first mixing and stirring tank to which the first micro / nano bubbles from the micro / nano bubble generator are supplied,
And a second mixing and stirring tank to which the second micro / nano bubbles from the micro / nano bubble generator are supplied.

  According to the water treatment apparatus of this embodiment, the first micro-nano bubbles and the microorganisms that are coarse can be cultured while being mixed and stirred in the first mixing and stirring tank of the microorganism culture tank. In the mixing and stirring tank, the minute second micro / nano bubbles and the microorganism can be cultured while being mixed and stirred. These micro micro-nano bubbles can be expected to activate microorganisms and oxidize free radicals on organic substances. The coarse micro / nano bubbles are effective for the activation of large microorganisms and air agitation in the tank.

  Moreover, in the water treatment apparatus of one Embodiment, the said additive tank adds both the said nutrient and the bubble generation aid to the said microorganism culture tank.

  According to the water treatment apparatus of this embodiment, since both the nutrient and the bubble generation aid are added from the additive tank to the microorganism culture tank, the nutrient serves as a nutrient source for the microorganism, and at the same time, the nutrient Regardless of whether the component of the agent is inorganic or organic, it is effective for the production of micro-nano bubbles. In short, it has been proved by experiments that a large amount of micro / nano bubbles are generated when an inorganic substance or an organic substance is dissolved in a liquid. In addition, there exist various minerals as a nutrient, and inorganic salts are mentioned as a bubble generation aid. When the minerals as nutrients and inorganic salts as bubble generation aids are added to the microorganism culture tank and the micro / nano bubble generator is operated, a large amount of coarse micro / nano bubbles are generated and microorganisms are generated. It will be activated.

  Moreover, in the water treatment apparatus of one Embodiment, the filler is arrange | positioned at the said contact oxidation tank.

  According to the water treatment apparatus of this embodiment, since the filler is filled in the contact oxidation tank, microorganisms are immobilized on the filler and the treatment with microorganisms is stabilized. In addition, innumerable micro-nano bubbles having a negative charge adhere to the filler, and the microorganisms immobilized on the filler easily use the micro-nano bubbles, and the microorganisms are more activated to improve the processing performance.

  Moreover, in the water treatment apparatus of one Embodiment, the polyvinylidene chloride filler is arrange | positioned as a filler in the said contact oxidation tank.

  According to the water treatment apparatus of this embodiment, since the polyvinylidene chloride filler as the filler is filled in the contact oxidation tank, microorganisms are immobilized on the polyvinylidene chloride filler and the microbial treatment is stabilized. . In addition, countless micro-nano bubbles with negative charges adhere to the polyvinylidene chloride filler, making it easier for microorganisms immobilized on the polyvinylidene chloride filler to use the micro-nano bubbles, activating the microorganisms and improving processing performance. To do.

  Moreover, in the water treatment apparatus of one embodiment, the treated water from the contact oxidation tank is introduced and has a circulation pump that returns the treated water to the contact oxidation tank and introduces the treated water into the discharge pump tank. A circulation pump tank was provided.

  According to the water treatment apparatus of this embodiment, the treatment capacity can be improved by circulating the treated water between the circulation pump tank and the contact oxidation tank.

  Further, in the water treatment apparatus of one embodiment, the contact oxidation tank is an aeration tank to be aerated, and further, treated water from the contact oxidation tank is introduced to contact the microbial sludge contained in the treated water with the contact water. It had a circulation pump which returned to an oxidation tank, and was equipped with a sedimentation tank which introduces the above-mentioned treated water into the above-mentioned discharge pump tank.

  According to the water treatment apparatus of this embodiment, the adjustment tank, the aeration tank, the sedimentation tank, and the discharge pump tank constitute the water treatment unit. Since these tanks are typical tanks in water treatment, they can be used for various wastewater treatment apparatuses, recycling apparatuses, sewage treatment apparatuses, human waste treatment apparatuses, and the like.

  In one embodiment of the water treatment apparatus, the contact oxidation tank is an aeration nitrification tank that performs aeration and nitrification, and further, treated water from the aeration nitrification tank is introduced and microbial sludge contained in the treated water is contained. And a precipitation denitrification tank for introducing the treated water into the discharge pump tank and returning it to the aeration nitrification tank with a circulation pump.

  According to the water treatment apparatus of this embodiment, since the aeration nitrification tank constituting the water treatment unit has both the function of the aeration tank and the function of the nitrification tank, the treatment performance can be improved. Moreover, since the precipitation denitrification tank which comprises a water treatment part has the function of a precipitation tank and the function of a denitrification tank, processing performance can be improved. As a result, the aeration nitrification tank and the precipitation denitrification tank of this embodiment are not only a simple wastewater treatment system, but a simple wastewater treatment system compared to a normal wastewater treatment apparatus composed of an aeration tank, a precipitation tank, a nitrification tank, and a denitrification tank. The construction cost and running cost can be reduced.

  Moreover, in the water treatment apparatus of one Embodiment, reused water flows in into the said adjustment tank as the said to-be-processed water.

  According to the water treatment device of this embodiment, since reused water flows into the adjustment tank constituting the water treatment unit, the reused water can be efficiently treated using microorganisms composed of useful bacteria, Reuse facilities can be made smaller, which helps to reduce initial costs.

  Moreover, in the water treatment apparatus of one Embodiment, sewage flows into the said adjustment tank as the said to-be-processed water.

  According to the water treatment apparatus of this embodiment, since sewage flows into the adjustment tank constituting the water treatment unit, the sewage can be efficiently treated using microorganisms composed of useful bacteria, and the sewage treatment facility can be made small. Can help to reduce initial costs. That is, it is possible to reduce the generated sludge and improve the denitrification performance in the sewage treatment.

  Moreover, in the water treatment apparatus of one Embodiment, urine flows into the said adjustment tank as said to-be-processed water.

  According to the water treatment apparatus of this embodiment, since urine flows into the adjustment tank constituting the water treatment unit, the human waste can be efficiently treated using microorganisms composed of useful bacteria, It can be made smaller and helps to reduce the initial cost.

  Moreover, in the water treatment apparatus of one Embodiment, the submerged membrane is installed in the water tank of the said contact oxidation tank, and a treated water is introduce | transduced into the said discharge pump tank from the submerged membrane of the said contact oxidation tank.

  According to the water treatment device of this embodiment, the water treatment unit is composed of the adjustment tank, the contact oxidation tank in which the liquid film is installed inside the water tank, and the discharge pump tank. It is possible to increase the concentration of useful microorganisms in the submerged membrane installed inside. And the treatment performance of a water treatment apparatus improves because useful microorganisms concentration becomes high concentration. That is, if a submerged membrane is used, the microorganism concentration in the inside of the contact oxidation tank can be efficiently increased by increasing the concentration of MLSS (mixed liquor / suspended solid) as an example to about 10,000 ppm to 30000 ppm. On the other hand, the microorganism concentration in an example of a normal contact oxidation tank that does not use a submerged membrane is in the range of 3000 ppm to 10,000 ppm in terms of MLSS concentration.

  Moreover, in the water treatment apparatus of one Embodiment, the said micro nano bubble water supply part supplies the micro nano bubble water containing the useful microorganisms activated from the said microorganism culture tank to the said adjustment tank.

  According to the water treatment apparatus of this embodiment, since the useful microorganisms activated from the microorganism culture tank to the adjustment tank are added, the adjustment tank becomes a pretreatment facility for the subsequent contact oxidation tank, and the subsequent contact oxidation is performed. The inflow load into the tank can be reduced.

  Moreover, in the water treatment apparatus of one Embodiment, activated useful microorganisms are added to both the adjustment tank of the said water treatment part, and the contact oxidation tank in which the liquid film was installed in the water tank inside.

  According to the water treatment apparatus of this embodiment, the activated useful microorganisms improve the treatment capacity of the adjustment tank and the contact oxidation tank, thereby improving the overall performance of the water treatment apparatus.

  In one embodiment of the water treatment method, the microorganism includes a group of microorganisms mainly consisting of Bacillus licheniformis.

  According to the water treatment method of this embodiment, a group of microorganisms mainly containing Bacillus licheniformis contained in the microorganism is activated synergistically by the minute second micro-nano bubbles and the coarse first micro-nano bubbles. , Processing efficiency can be improved.

  In one embodiment of the water treatment method, the microorganism includes a group of microorganisms mainly composed of Pseudomonas fluorescens.

  According to the water treatment method of this embodiment, the microorganism group mainly composed of Pseudomonas fluorescens is synergistically activated by the minute second micro-nano bubbles and the coarse first micro-nano bubbles, Processing efficiency can be improved.

  Moreover, in the water treatment method of one embodiment, the microorganisms include a group of microorganisms mainly composed of Pseudomonas putida.

  According to the water treatment method of this embodiment, the microorganism group mainly composed of Pseudomonas putida is activated synergistically by the minute second micro-nano bubbles and the coarse first micro-nano bubbles. It can be improved.

  Moreover, in the water treatment apparatus of one Embodiment, the said nutrient contains silicon.

  According to the water treatment apparatus of this embodiment, since the nutrient contains silicon, it is not only effective for activating microorganisms, but silicon is an inorganic ion, so that the inorganic ion dissolves in water. As a result, a larger amount of micro-nano bubbles can be produced. That is, it has been experimentally found that when nano ions are added to water, more micro-nano bubbles are generated.

  Moreover, in the water treatment apparatus of one Embodiment, the said nutrient contains potassium.

  According to the water treatment apparatus of this embodiment, since the nutrient contains potassium, it is not only effective for activating microorganisms, but since potassium is an inorganic ion, the inorganic ion dissolves in water. As a result, a larger amount of micro-nano bubbles can be produced.

  Moreover, in the water treatment apparatus of one Embodiment, the said nutrient contains magnesium.

  According to the water treatment apparatus of this embodiment, since the nutrient contains magnesium, it is effective not only for activating microorganisms, but also because magnesium is an inorganic ion, the inorganic ion dissolves in water. As a result, a larger amount of micro-nano bubbles can be produced.

  Moreover, in the water treatment apparatus of one Embodiment, the said nutrient contains nitrogen.

  According to the water treatment apparatus of this embodiment, since the nutrient contains nitrogen, it is effective not only for activating microorganisms, but also nitrogen is added as nitrate ions, so that inorganic ions are added. In addition, by dissolving inorganic ions in water, a larger amount of micro / nano bubbles can be produced. In addition, nitrate ions are useful for producing micro-nano bubbles and are also effective as nutrient sources for activating microorganisms. In addition, when nitrate ions are present in a large amount in the water to be treated, it may be necessary to denitrify the water in the wastewater treatment apparatus.

  Moreover, in the water treatment apparatus of one Embodiment, the said nutrient contains phosphorus.

  According to the water treatment apparatus of this embodiment, since the nutrient contains phosphorus, not only is it effective for activating microorganisms, but phosphorus is added as phosphate ions, so the addition of inorganic ions Thus, by dissolving inorganic ions in water, a larger amount of micro / nano bubbles can be produced. Phosphate ions are useful for the production of micro-nano bubbles and are also effective as nutrient sources for activating microorganisms. When a large amount of phosphate ions is present in the water to be treated, it may be necessary to dephosphorize the water treatment unit of the waste water treatment apparatus.

  Moreover, in the water treatment apparatus of one Embodiment, the said nutrient contains silicon, potassium, magnesium, nitrogen, and phosphorus.

  According to the water treatment apparatus of this embodiment, since the nutrient contains silicon, potassium, magnesium, nitrogen and phosphorus, not only is it effective for activating microorganisms, but also addition of various inorganic ions, By dissolving various inorganic ions in water, a larger amount of micro / nano bubbles can be produced.

  Moreover, in the water treatment apparatus of one Embodiment, the said bubble generation adjuvant contains inorganic salt.

  According to the water treatment apparatus of this embodiment, since the bubble generation aid contains inorganic salts, not only is it effective for activating microorganisms, but various inorganic salts are added to water by adding various inorganic salts. It is possible to produce a larger amount of micro / nano bubbles by dissolving in the solution.

  Moreover, in the water treatment apparatus of one Embodiment, the said bubble generation aid contains the sodium salt.

  According to the water treatment apparatus of this embodiment, since the bubble generation aid contains a sodium salt, not only is it effective for activating microorganisms, but the sodium salt is dissolved in water by the addition of the sodium salt. As a result, a larger amount of micro / nano bubbles can be produced.

  Moreover, in the water treatment apparatus of one Embodiment, the said bubble generation aid contains the calcium salt.

  According to the water treatment apparatus of this embodiment, since the bubble generation aid contains a calcium salt, not only is it effective for activating microorganisms, but the calcium salt is dissolved in water by the addition of the calcium salt. As a result, a larger amount of micro / nano bubbles can be produced.

  Moreover, in the water treatment apparatus of one Embodiment, the said bubble generation adjuvant contains potassium salt.

  According to the water treatment apparatus of this embodiment, since the bubble generation aid contains a potassium salt, not only is it effective for activating microorganisms, but the potassium salt is dissolved in water by the addition of the potassium salt. As a result, a larger amount of micro / nano bubbles can be produced.

  Moreover, in the water treatment apparatus of one Embodiment, the said bubble generation adjuvant contains magnesium salt.

  According to the water treatment apparatus of this embodiment, since the bubble generation aid contains a magnesium salt, it is effective not only for activating microorganisms but also by adding the magnesium salt, the magnesium salt is dissolved in water. As a result, a larger amount of micro / nano bubbles can be produced.

  According to the water treatment method of the present invention, microorganisms are activated by the first and second micro-nano bubbles having different sizes, so that most of the microorganisms having different sizes can be activated, and most of the activated microorganisms are activated. The efficiency of water treatment by microorganisms can be improved.

It is a figure which shows typically 1st Embodiment of the waste water treatment equipment of this invention. It is a figure which shows typically 2nd Embodiment of the waste water treatment equipment of this invention. It is a figure which shows typically 3rd Embodiment of the waste water treatment equipment of this invention. It is a figure which shows typically 4th Embodiment of the waste water treatment equipment of this invention. It is a figure which shows typically 5th Embodiment of the waste water treatment equipment of this invention. It is a figure which shows typically 6th Embodiment of the waste water treatment equipment of this invention. It is a figure which shows typically 7th Embodiment of the waste water treatment equipment of this invention. It is a figure which shows typically 8th Embodiment of the waste water treatment equipment of this invention.

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

(First embodiment)
FIG. 1 is a diagram schematically showing a first embodiment of the water treatment apparatus of the present invention. The water treatment apparatus of the first embodiment is mainly composed of a water treatment unit 57 and a microorganism activation unit 58. In more detail, the water treatment unit 57 includes a contact adjustment tank 2, a contact oxidation tank 9, a circulation pump tank 15, and a discharge pump tank 20. On the other hand, the microorganism activation unit 58 includes a micro / nano bubble generator 26, a microorganism culture tank 27, and a nutrient / bubble generation assistant tank 28 as an additive tank.

  Next, the first embodiment will be described in more detail with reference to FIG. The raw water flows into the contact adjustment tank 2 via the raw water pipe 1. The contact adjusting tank 2 is a water tank for adjusting the quality and amount of influent water by air agitation by discharging air through the air diffusing tube 5.

  Activated microorganisms from the microorganism activation unit 58 are introduced into the contact adjusting tank 2 via the water pipe 14 under the condition that the motor-operated valve 12 is opened. For this reason, in the contact adjustment tank 2, the process by an activated microbe will also be implemented. In the contact adjusting tank 2, a diffuser pipe 5 is installed at the lower part of the water tank, and air discharged from the blower 3 is discharged from the diffuser pipe 5 via the air pipe 4 to become bubbles 19, and the inside of the contact adjusting tank 2. The air is stirred. And in this contact adjustment tank 2, the to-be-processed water by which the water quality was adjusted by the activated microbe and air stirring is the next tank through the water piping 7 and the screen unit 8 by the contact adjustment tank pump 6. It is introduced into the contact oxidation tank 9. The purpose of the screen unit 8 was simply to remove suspended substances, and a commercially available bar screen type screen unit 8 was adopted.

  A diffuser pipe 10 is installed at the bottom of the water tank of the contact oxidation tank 9. The air diffuser 10 discharges bubbles 55 from the air sent from the blower 50 via the air pipe 11 and performs air agitation in the contact oxidation tank 9. Microorganisms activated by the microorganism activation unit 58 are introduced into the contact oxidation tank 9 via the water pipe 14 under the condition that the electric valve 13 is opened. By introducing the activated microorganisms into the contact oxidation tank 9, the treatment performance in the contact oxidation tank 9 is improved.

  The activated microorganisms in the contact oxidation tank 9 can efficiently decompose not only general microorganisms but also oil and fat components in the water to be treated. When fats and oils are microbially decomposed, they become fatty acids and glycerin, and as a result, the measured value of the normal hexane extract, which is a water quality item, decreases. The basic idea of the decomposition of the oil and fat component is to decompose the oil and fat into fatty acid and glycerin by an enzyme (lipase) secreted by activated microorganisms.

  Further, the activated microorganism is added to the contact oxidation tank 9 from the microorganism culture tank 27 as a specific facility by the addition pump 49 via the water pipe 14 constituting the micro / nano bubble water supply unit. This activated microorganism is in a state of being contained in water as a liquid, and this liquid (water) contains minute micro-nano bubbles. For this reason, the water containing the said activated microorganism exhibits both the effect | action by an activated microorganism and the effect | action by a micro micro nano bubble. A specific example of the activated microorganism is Bacillus subtilis. The fine micro / nano bubbles contain a large amount of ultra fine bubbles having a diameter of about several hundreds of nanometers as the second micro / nano bubbles.

  Here, the effect | action of the said micro micro nano bubble is demonstrated.

  1stly, the said micro micro nano bubble has the effect | action which activates Bacillus subtilis which is a useful microorganism. Secondly, there is an action of oxidizing and decomposing organic substances and hardly decomposed organic substances by an oxidizing action caused by free radicals possessed by the micro-micronano bubbles.

  The water to be treated that has been treated with the activated microorganisms and micro-micro / nano bubbles in the contact oxidation tank 9 flows into the circulation pump tank 15 via the overflow pipe 73. The circulation pump tank 15 returns the activated activated microorganisms that have flowed in to the contact oxidation tank 9 via the water pipe 25 by the circulation pump 17. The sludge from the activated microorganisms does not flow out from the circulation pump tank 15 to the discharge pump tank 20 because the sedimentation in the circulation pump tank 15 is further improved by the micro-micronano bubbles. In the circulation pump tank 15, the air discharged from the blower 50 is discharged from the air diffuser 16 via the air pipe 11. Further, the discharge air from the air diffuser 16 is adjusted by a valve (not shown), and the activated microorganisms are stirred in the circulation pump tank 15. Therefore, the activated microbial sludge flowing into the circulation pump tank 15 is efficiently returned to the contact oxidation tank 9 by the circulation pump 17. In this way, the activated microbial sludge flows from the circulation pump tank 15 to the discharge pump tank 20 by the combination of the contact oxidation tank 9, the circulation pump tank 15, the circulation pump 17 and the activated useful bacteria Bacillus subtilis. There is nothing at all. And finally, the treated water that has flowed into the discharge pump tank 20 is discharged to the outside as treated water by the discharge pump 22 installed in the discharge pump tank 20.

  The discharge pump tank 20 is also provided with a diffuser pipe 21, and the discharge air from the blower 50 is discharged from the diffuser pipe 21. When the discharge pump tank 20 is cleaned about once every several years, the discharge air from the blower 50 is discharged from the diffuser pipe 21 and used.

  Next, the microorganism activation unit 58 will be described in detail. As described above, the microorganism activation unit 58 includes the micro / nano bubble generator 26, the microorganism culture tank 27, and the nutrient / bubble generation assistant tank 28. The micro / nano bubble generator 26 includes a pressurized tank 33, a surplus air tank 32, and a vortex pump 39 to which a gas shearing section 38 is added. Water containing nutrients and bubble generation aids flows into the vortex pump 39 added by the gas shearing section 38 via the suction pipe 41, and the impeller of the vortex pump 39 is driven by the impeller of the vortex pump 39 at high speed. By rotating, gas-liquid mixing and shearing are performed. Note that a certain amount of air as gas is introduced from the air suction pipe 75 under the condition that the valve 76 is opened.

  Here, the mechanism of micro / nano bubble generation in the vortex pump 39 and the gas shearing part 38 constituting the micro / nano bubble generator 26 will be described.

  In the vortex pump 39 and the gas shearing portion 38 of the micro / nano bubble generator 26, in order to generate micro / nano bubbles, a mixed phase swirl flow of liquid and gas is generated, and a gas cavity portion that is swirled at a high speed is formed at the center of rotation. Next, this gas cavity is thinned into a tornado shape by pressure to generate a rotating shear flow that swirls at a higher speed. The gas cavity is automatically supplied with air as a gas using a negative pressure (negative pressure). Further, the multiphase flow is rotated while cutting and pulverizing the gas cavity. This cutting and pulverization occurs due to the difference in the swirling speed of the gas-liquid two-phase fluid inside and outside the vicinity of the apparatus outlet. The rotation speed at that time is 500 to 600 rotations / second.

  That is, in the vortex pump 39 of the micro / nano bubble generator 26, by controlling the pressure hydrodynamically, the gas is sucked from the negative pressure forming portion, and the vortex pump 39, which is a high-lift pump, is caused to move at high speed and move negatively. A pressure part is formed, and micro-nano bubbles and nano bubbles are generated. To make it easier to understand, it is possible to produce micro-nano bubbles and nano-bubbles by effectively self-supplying, mixing, dissolving, pumping and high-speed shearing water and air with a high-lift pump which is a vortex pump 39 It can be done.

  The above is the mechanism of micro / nano bubble generation by the vortex pump 39 added by the gas shearing section 38 in the micro / nano bubble generator 26. Note that the addition of nutrients and bubble generation aids to the water flowing into the vortex pump 39 has the effect of dramatically increasing the amount of micro-nano bubbles generated.

  Thus, the micro / nano bubble water generated by the vortex pump 39 is then introduced into the pressurized tank 33 via the discharge water pipe 37. The purpose of the pressurized tank 33 is to pressurize and dissolve the generated micro / nano bubbles in water. Therefore, by passing through the pressurized tank 33, the micro / nano bubbles are dissolved in water and the dissolved oxygen concentration is increased. The water leaving the pressurized tank 33 is introduced into the surplus air tank 32 via the pipe 35. The surplus air tank 32 has a function of discharging coarse micro / nano bubbles, which are surplus air, from the upper part of the surplus air tank 32 from the open motor-operated valve 34 in order to produce micro micro / nano bubbles in the tank 32. Thereby, it is possible to produce fine micro-nano bubbles having an oxidizing action and good dissolution efficiency.

  Even if it is a coarse micro nano bubble which is surplus air, it is 1 type of a micro nano bubble. The coarse micro / nano bubbles are mostly bubbles of several tens of μm (first micro / nano bubbles). Therefore, the water containing the coarse micro / nano bubbles is discharged from the coarse micro / nano bubble water discharge pipe 48 inside the micro / micro / nano bubble mixing / stirring tank 46 via the coarse micro / nano bubble water pipe 36 as a pipe, and the coarse / micro / nano bubble is discharged. Stream 56 is obtained. The coarse micro / nano bubble stream 56 is used for stirring in the coarse micro / nano bubble mixed stirring tank 46 for Bacillus subtilis culture.

  On the other hand, a pressure gauge 31 is installed in the surplus air tank 32. Then, in producing the micro micro / nano bubbles, the pressure in the surplus air tank 32 is adjusted by adjusting the opening of the electric valve 34 and the electric valve 30 in order to obtain an optimum pressure in the surplus air tank 32. is doing. As a result of operation with actual drainage, the value of the pressure gauge 31 varies slightly depending on the type of drainage, but the pressure is often about 0.4 MPa (megapascal). Under the operating conditions based on this pressure, the micro-micro nano bubbles that have passed through the motor-operated valve 30 are discharged from the micro-micro-nano bubble discharge pipe 42 in the micro-nano-bubble generating tank 40 via the micro-micro-nano bubble water pipe 29, and the micro-micro-nano bubble flow 43 will occur.

  Specifically, the micro / nano bubble generator 26 employs a vortex pump 39 to which a gas shearing unit 38 of Nikuni Co., Ltd., a surplus air tank 32 and a pressurized tank 33 of Nikuni Co., Ltd. are employed. In order to generate two types of coarse micro-nano bubbles and micro-micro-nano bubbles, a vortex pump 39, a surplus air tank 32, a pressurized tank 33 and a nutrient / bubble generating aid added by a gas shearing unit 38 of Nikuni Co., Ltd. Equipment to be added is required.

  Further, as a facility for adding the nutrient / bubble generating aid, the nutrient / bubble generating assistant tank 28, the metering pump 52, and the like are required. That is, the nutrient / bubble generating aid is introduced from the water pipe 54 to the nutrient / bubble generating assistant tank 28. Further, water containing a nutrient / bubble generation aid is sucked from the nutrient / bubble generation aid tank 28 into the suction pipe 51 by the metering pump 52 and then into the micro / nano bubble generation tank 40 via the water pipe 53. Nutrients and bubble generation aids are introduced.

  Next, the microorganism culture tank 27 will be described. The microorganism culture tank 27 is composed of a micro micro / nano bubble mixing / stirring tank 40 and a coarse micro / nano bubble mixing / stirring tank 46. In addition, a hopper 45 and an automatic feeder 44 below the hopper 45 are installed in the upper part of the micro / nano bubble mixing / stirring tank 40 in order to introduce Bacillus subtilis, which is a useful bacterium. Then, Bacillus subtilis sapolophitec was introduced into the hopper 45 as a useful Bacillus subtilis. Bacillus subtilis saporophytech as Bacillus subtilis purchased a product mixed in steam-sterilized wheat bran and put it into the hopper 45. This Bacillus subtilis saporophytec is in a tentative state when mixed in steam-sterilized wheat bran. And this Bacillus subtilis saporophytec is supplied to the micro / micro / nano bubble mixing / stirring tank 40 by the automatic feeder 44, and mixed and stirred with water or micro / micro / nano bubbles as a liquid to activate and proliferate from the premature death state. To act. At this time, if any one or all of silicon, potassium, magnesium, nitrogen, phosphorus and the like are further contained in the water as the liquid, the activation proceeds more efficiently.

  The asphyxia of Bacillus subtilis saporophytec mixed with the bran lasts for up to 3 years. That is, it can be stored for a maximum of 3 years.

  The useful microorganism Bacillus subtilis sapolophytech mixed with the bran is supplied to the micro / micro / nano bubble mixing / stirring tank 40 by the automatic feeder 44 and mixed and stirred with water as a liquid. In particular, the micro micro nano bubbles are discharged from the micro micro nano bubble water discharge pipe 42 to generate a micro micro nano bubble flow, and the micro micro nano bubble mixing and stirring tank 40 is mixed and stirred. The useful microorganisms mixed and stirred in the micro micro / nano bubble mixing / stirring tank 40 then flow into the coarse micro / nano bubble mixing / stirring tank 46 by overflow. In the coarse micro / nano bubble mixing / stirring tank 46, coarse micro / nano bubbles are discharged from the coarse micro / nano bubble water discharge pipe 48 to form a coarse micro / nano bubble flow 56. The activity of useful microorganisms (Bacillus subtilis sapolophitec) gradually increases with the coarse micro / nano bubble flow 56 in the coarse / micro nano bubble mixing and stirring tank 46 and with the passage of time.

  And this useful microorganism (Bacillus subtilis saporophytec) is required for the contact adjusting tank 2 or the contact oxidation tank 9 or both of them by the addition pump 49 via the suction pipe 47 and the water pipe 14. Added accordingly. The control of adding the useful microorganisms to the contact adjusting tank 2 or the contact oxidation tank 9 or both of them is performed by automatically controlling the opening / closing of the motor-operated valve 12 or the motor-operated valve 13. The automatic opening / closing control of the motor-operated valve 12 or the motor-operated valve 13 is performed by control using a timer or control performed in conjunction with the quality of treated water using a water quality measuring device (not shown). be able to.

  As described above, according to this embodiment, in the microorganism activation unit 58, micronanobubble water containing useful microorganisms activated by coarse micronanobubbles and minute micronanobubbles is passed from the microorganism culture tank 27 via the water pipe 14. Then, it is supplied to at least one of the contact adjustment tank 2 and the contact oxidation tank 9. The activated useful microorganisms and coarse, micro-micro / nano bubbles can improve the water treatment capacity of the water treatment unit 57 formed by the contact adjustment tank 2, the contact oxidation tank 9, the circulation pump tank 15, and the discharge pump tank 20. it can.

  Here, various bubbles will be described.

  (i) Normal bubbles (bubbles) rise in the water and eventually disappear on the surface by popping with bread.

  (ii) A microbubble is a bubble having a bubble diameter of 10 to several tens of μm at the time of its generation, and changes to a micro / nano bubble by contraction after the generation.

  (iii) Nano bubbles are bubbles having a diameter of several hundred nm or less.

  (iv) Micro-nano bubbles are bubbles having a diameter of about 10 μm to several hundreds of nm and can be described as a mixture of micro-bubbles and nano-bubbles.

  In the above embodiment, Bacillus subtilis saporophytech as Bacillus subtilis is adopted as an example of a useful microorganism to be introduced into the microorganism culture tank 27. It is good also as the microorganisms which contain the microorganism group mainly composed of Pseudomonas fluorescens, or the microorganism group mainly composed of Pseudomonas ptida. Moreover, in the said embodiment, although both the nutrient and the bubble generation aid were added from the nutrient / bubble generation aid tank 28 to the microorganism culture tank 27, either the nutrient or the bubble generation aid was subjected to the microorganism culture. You may add to the tank 27. As the bubble generation aid, inorganic salts, sodium salts, calcium salts, potassium salts, magnesium salts and the like can be employed.

(Second embodiment)
Next, FIG. 2 shows a second embodiment of the water treatment apparatus of the present invention. This second embodiment is different from the first embodiment described above only in that the contact material 59 is filled in the contact oxidation tank 9 of the water treatment unit 57 of FIG. Therefore, in the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, detailed description thereof is omitted, and parts different from those in the first embodiment are described.

  As shown in FIG. 2, in the second embodiment, a fibrous polyvinylidene chloride filler as a specific example of the contact material 59 is filled in the contact oxidation tank 9. Therefore, in this contact oxidation tank 9, when the activated useful microorganism Bacillus subtilis sapolophite adheres to and propagates on the polyvinylidene chloride filling material as the contact material 59, the contact material 59 is not filled. Compared to many advantages. The merits include the following contents (1) to (3).

  (1) Even if the quality of the influent raw water fluctuates, the quality of the treated water will be stable.

  (2) The quality of treated water can be maintained stably even if the water quality load of inflow raw water increases to some extent.

  (3) Even if a certain amount of bactericidal agent is mixed in as raw inflow water, it is resistant to shock and the quality of treated water is stable.

(Third embodiment)
Next, FIG. 3 shows a third embodiment of the water treatment apparatus of the present invention. In this third embodiment, the point that the water treatment unit 57 has an aeration tank 60 instead of the contact oxidation tank 9 and the point that it has a precipitation tank 61 instead of the circulation pump tank 15 are the first embodiment described above. Is different. Therefore, in the third embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, detailed description thereof will be omitted, and parts different from those in the first embodiment will be described.

  In the third embodiment, the sludge precipitated in the lower part of the settling tank 61 can be returned to the aeration tank 60 via the sludge return pipe 63 by the settling tank sludge return pump 62. In this 3rd Embodiment, the water treatment part 57 has the structure which combined the aeration tank 60, the sedimentation tank 61, and the sedimentation tank sludge return pump 62 for returning sludge.

  In the first embodiment described above, the wastewater treatment device is intended for microbial sludge having good sedimentation properties, and the sludge is naturally precipitated by circulation in the circulation pump tank 15, so that no precipitation tank is required. . On the other hand, in this 3rd Embodiment, it is the waste water treatment equipment which aimed at microbial sludge with comparatively bad sedimentation property, and is the waste water treatment equipment which requires the sedimentation tank 61. FIG. The waste water treatment system constituted by the contact adjusting tank 2, the aeration tank 60, the sedimentation tank 61, and the discharge pump tank 20 of the water treatment unit 57 of the third embodiment is a general waste water treatment than the first embodiment described above. Since it is a system, there are a lot of target wastewater. That is, the third embodiment can be adopted at many wastewater treatment sites.

(Fourth embodiment)
Next, FIG. 4 shows a fourth embodiment of the water treatment apparatus of the present invention. In the fourth embodiment, the water treatment unit 57 has an aeration nitrification tank 64 instead of the contact oxidation tank 9 and a precipitation denitrification tank 65 instead of the circulation pump tank 15. It is different from the embodiment. Therefore, in the fourth embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, detailed description thereof will be omitted, and parts different from those in the first embodiment will be described.

  In the fourth embodiment, the sludge precipitated in the lower part of the precipitation denitrification tank 65 can be returned to the aeration nitrification tank 64 via the sludge return pipe 63 by the precipitation denitrification tank sludge return pump 77. In this 4th Embodiment, the water treatment part 57 has the structure which combined the aeration nitrification tank 64, the precipitation denitrification tank 65, and the precipitation denitrification tank sludge return pump 77 for returning sludge.

  In the first embodiment described above, the wastewater treatment device is intended for microbial sludge having good sedimentation properties, and the sludge is naturally precipitated by circulation in the circulation pump tank 15, so that no precipitation tank is required. . On the other hand, in this 4th Embodiment, it is the waste water treatment equipment which aimed at microbial sludge with comparatively bad sedimentation property, and is a waste water treatment facility which requires the precipitation denitrification tank 65. FIG. That is, the fourth embodiment is an embodiment suitable for removing nitrogen components in the water to be treated in the wastewater treatment.

  The waste water treatment system constituted by the contact adjusting tank 2, the aeration nitrification tank 64, the precipitation denitrification tank 65, and the discharge pump tank 20 of the water treatment unit 57 of the fourth embodiment removes nitrogen components in the treated water (denitrification). )it can. Therefore, according to this 4th Embodiment, compared with the above-mentioned 1st Embodiment, the processing function as a waste water treatment apparatus becomes a content higher than 1st Embodiment. In particular, the nitrification action and denitrification reaction for nitrogen components in the water to be treated are valuable treatment contents as a wastewater treatment apparatus. Therefore, this fourth embodiment is an optimum waste water treatment apparatus in an area where nitrogen regulation is present.

(Fifth embodiment)
Next, FIG. 5 shows a fifth embodiment of the water treatment apparatus of the present invention. This fifth embodiment is different from the above-described fourth embodiment only in that the inflow water to the raw water pipe 1 is replaced with raw water to be reused water. Therefore, in the fifth embodiment, the same parts as those in the above-described fourth embodiment are denoted by the same reference numerals, detailed description thereof will be omitted, and parts different from those in the above-described fourth embodiment will be described.

  In the fifth embodiment, the inflow water is reused water, and the water treatment unit 57 has a combination of an aeration nitrification tank 64, a precipitation denitrification tank 65, and a precipitation denitrification tank sludge return pump 77 for returning sludge. is doing.

  In the first embodiment described above, the wastewater treatment device is intended for microbial sludge having good sedimentation properties, and the sludge is naturally precipitated by circulation in the circulation pump tank 15, so that no precipitation tank is required. . On the other hand, the fifth embodiment is a wastewater treatment apparatus for microbial sludge having a relatively poor sedimentation property, and is a wastewater treatment facility that requires a precipitation denitrification tank 65. That is, the fifth embodiment is an embodiment suitable for removing nitrogen components in the water to be treated in the reuse water treatment apparatus.

  The reuse water treatment system constituted by the contact adjustment tank 2, the aeration nitrification tank 64, the precipitation denitrification tank 65, and the discharge pump tank 20 of the water treatment unit 57 of the fifth embodiment is in the reuse water (treated water). Can be removed (denitrified). Therefore, according to this 5th Embodiment, the treatment function as a reuse water treatment apparatus becomes a content higher than 1st Embodiment. In particular, nitrification and denitrification for nitrogen components in the water to be treated are valuable treatment contents as a reuse water treatment device. Therefore, the fifth embodiment is an optimum reuse water treatment apparatus when there is reuse water from which nitrogen is to be removed.

(Sixth embodiment)
Next, FIG. 6 shows a sixth embodiment of the present invention. This sixth embodiment is different from the above-described fourth embodiment only in that the inflow water to the raw water pipe 1 is changed to raw water and used as sewage. Therefore, in the sixth embodiment, the same portions as those in the above-described fourth embodiment are denoted by the same reference numerals, detailed description thereof is omitted, and portions different from those in the above-described fourth embodiment are mainly described.

  In the sixth embodiment, the inflow water to the raw water pipe 1 is general and large-scale sewage, and the water treatment unit 57 returns the aeration nitrification tank 64, the precipitation denitrification tank 65, and the sedimentation denitrification tank sludge for returning sludge. The return pump 77 is combined.

  In the above-described first embodiment, since the wastewater treatment apparatus is intended for microbial sludge having good sedimentation properties, the sludge naturally settles by circulation in the circulation pump tank 15, so that no sedimentation tank is required. . In contrast, the sixth embodiment is a wastewater treatment apparatus for microbial sludge having a relatively poor sedimentation property, and is a wastewater treatment facility that requires a precipitation denitrification tank 65. In other words, the sixth embodiment is an embodiment suitable for removing nitrogen components in the water to be treated in the sewage treatment apparatus.

  The sewage treatment system of the contact treatment tank 2, the aeration nitrification tank 64, the precipitation denitrification tank 65, and the discharge pump tank 20 of the water treatment unit 57 of the sixth embodiment can remove (denitrify) nitrogen components in the water to be treated. . Therefore, this 6th Embodiment has a processing function as a sewage treatment apparatus higher than the above-mentioned 1st Embodiment. In particular, in a sewage treatment apparatus, nitrification and denitrification for nitrogen components in the water to be treated are valuable treatment contents. Therefore, the sixth embodiment is an optimum sewage treatment apparatus when there is sewage from which nitrogen should be gradually removed.

(Seventh embodiment)
Next, FIG. 7 shows a seventh embodiment of the present invention. This seventh embodiment is different from the above-described fourth embodiment only in that the inflow water to the raw water pipe 1 is replaced with raw water and is generally large in scale and urine. Therefore, in the seventh embodiment, the same portions as those in the above-described fourth embodiment are denoted by the same reference numerals, detailed description thereof is omitted, and portions different from those in the above-described fourth embodiment are mainly described.

  In the seventh embodiment, the inflow water to the raw water pipe 1 is human waste, and the water treatment unit 57 is combined with an aeration nitrification tank 64, a precipitation denitrification tank 65, and a sedimentation denitrification tank sludge return pump 77 for returning sludge. It has a configuration.

  In the above-described first embodiment, since the wastewater treatment apparatus is intended for microbial sludge having good sedimentation properties, the sludge naturally settles by circulation in the circulation pump tank 15, so that no sedimentation tank is required. . On the other hand, in the seventh embodiment, the waste water treatment apparatus is intended for microbial sludge having relatively poor sedimentation properties, and is a waste water treatment facility that requires a precipitation denitrification tank 65. That is, the seventh embodiment is an embodiment suitable for removing nitrogen components in the water to be treated in the human waste treatment apparatus.

  The human waste treatment system of the contact adjusting tank 2, the aeration nitrification tank 64, the precipitation denitrification tank 65, and the discharge pump tank 20 of the water treatment unit 57 of the seventh embodiment can remove (denitrify) nitrogen components in the water to be treated. . Therefore, this 7th Embodiment has a higher processing function as a human waste processing system than the above-mentioned 1st Embodiment. In particular, in a human waste treatment apparatus, nitrification and denitrification for nitrogen components in the water to be treated are valuable treatment contents. Therefore, this seventh embodiment is an optimal human waste treatment apparatus when there is sewage from which nitrogen should be gradually removed.

(Eighth embodiment)
Next, FIG. 8 shows an eighth embodiment of the water treatment apparatus of the present invention. In the eighth embodiment, the water treatment unit 57 has a submerged film installation contact oxidation tank 66 instead of the contact adjustment tank 2, and the point that the circulation pump tank 15 is not provided. Different from one embodiment. Therefore, in the eighth embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals and detailed description thereof is omitted, and parts different from those in the first embodiment are described.

  In the eighth embodiment, the water treatment unit 57 includes the contact adjustment tank 2, the submerged film installation contact oxidation tank 66, and the discharge pump tank 20. In the submerged film installation contact oxidation tank 66, the useful microorganism concentration can be set to 10000 ppm or more in terms of MLSS (activated sludge suspended solids) concentration. A submerged film 69 is installed in the submerged film installation contact oxidation tank 66. Here, the submerged membrane 69 means an alias, an ultrafiltration membrane, and the size of the membrane hole is generally 1 micron or less. Therefore, microorganisms cannot pass through the submerged membrane 69, but water molecules can pass through, so that the microorganisms and water can be separated reasonably.

  The treated water separated by the submerged membrane 69 is supplied from the water pipe 70 to the discharge pump tank 20 through the submerged membrane pump 71 and the treated water pipe 72. In FIG. 8, reference numeral 67 denotes a cleaning air diffuser. The submerged film 69 can be cleaned by the cleaning air 68 discharged from the cleaning air diffuser 67.

  In the eighth embodiment, as described above, in the submerged film-installed contact oxidation tank 66, the useful microorganism concentration can be set to 10000 ppm or more in the MLSS concentration, so that the treatment capacity of the waste water treatment apparatus can be improved. In addition, stabilization of treatment and reduction of generated sludge can be realized.

(Experimental example)
An experimental apparatus was manufactured based on the water treatment apparatus of the first embodiment shown in FIG. In this experimental apparatus, the capacity of the contact adjusting tank 2 is about 1 m ³ , the capacity of the contact oxidation tank 9 is 2 m ³ , the capacity of the circulation pump tank 15 is 1 m ^3, and the capacity of the discharge pump tank 20 is 1 m ³ . . Further, a 0.01 m ³ the capacity of the pressure tank 33 in the micro-nano bubble generator 26, the volume of excess air tank 32 and 0.01 m ³ in the micro-nano bubble generator 26, the capacity of the micro micronanobubble mixture stirred tank 40 and 0.1 m ^3, the volume of coarse micro-nano bubble mixture stirred tank 46 and 0.05 m ^3, were the capacity of the nutrient bubble generating aid tank 28 and 0.05 m ^3. The above experimental apparatus was prepared by preparing two series of A-series experimental apparatus and B-series experimental apparatus.

  For comparison, artificial drainage as water to be treated was introduced and tested for two series of experimental devices, A series and B series. In the A series experimental apparatus, the micro / nano bubble generator 26 was operated. However, in the B series experimental apparatus, the micro / nano bubble generator 26 was not operated.

Then, after both of the above test runs, when comparing the water quality concentration of the inflow water to the contact adjusting tank 2 and the treated water at the outlet of the discharge pump tank 20 in the A-series experimental apparatus and the B-series experimental apparatus, the following comparison was made. The contents are shown in the table.
(Comparison table)

  According to the contents of the experimental result comparison table in the above table, the micro-nano bubble generator is used for each item of biological oxygen demand (BOD), chemical oxygen demand (COD), suspended solids (SS), and normal hexane extract. It was found that the A series that operated the No. 26 performed better in terms of removal rate than the B series that did not operate the micro / nano bubble generator 26.

DESCRIPTION OF SYMBOLS 1 Raw water piping 2 Contact adjustment tank 3 Blower 4 Air piping 5 Aeration pipe 6 Contact adjustment tank pump 7 Water piping 8 Screen unit 9 Contact oxidation tank 10 Aeration pipe 11 Air piping 12, 13 Electric valve 14 Water piping 15 Circulation pump tank 16 Scattering Trachea 17 Circulation pump 18, 19 Bubble 20 Discharge pump tank 21 Diffuser pipe 22 Discharge pump 23 Bubble 24, 25 Water pipe 26 Micro / nano bubble generator 27 Microbial culture tank 28 Nutrient / bubble generation aid tank 29 Micro micro / nano bubble water pipe 30 Motorized valve
31 Pressure gauge 32 Excess air tank 33 Pressurized tank 34 Electric valve 35 Piping 36 Coarse micro / nano bubble water piping 37 Piping 38 Gas shearing part 39 Eddy current pump 40 Micro / micro bubble mixing / stirring tank 41 Suction piping 42 Micro micro / nano bubble water discharge piping 43 Micro Micro-nano bubble flow 44 Automatic feeder 45 Hopper 46 Coarse micro-nano bubble mixing and stirring tank 47 Suction pipe 48 Coarse micro-nano bubble water discharge pipe 49 Addition pump 50 Blower 51 Suction pipe 52 Metering pump 53, 54 Water pipe 55 Bubble 56 Coarse micro-nano bubble stream 57 Water treatment part 58 Microbial activation part 59 Contact material 60 Aeration tank 61 Precipitation tank 62 Precipitation tank sludge return pump 63 Sludge return pipe 64 Aeration nitrification tank 65 Precipitation denitrification tank 66 Submerged film installation contact oxidation tank 67 Aeration pipe 68 for cleaning Cleaning air 69 Submerged membrane 70 Water piping 71 Submerged membrane pump 72 Treated water piping 73, 74 Overflow piping 75 Air suction piping 76 Valve 77 Precipitation denitrification tank sludge return pump

Claims (39)

  A water treatment method characterized by activating a microorganism with a first micro / nano bubble and a second micro / nano bubble having a size smaller than the size of the first micro / nano bubble, and performing water treatment with the activated microorganism. . The water treatment method according to claim 1,
A water treatment method, wherein the microorganism contains Bacillus subtilis. The water treatment method according to claim 1 or 2,
A water treatment method, wherein the microorganism comprises a group of microorganisms mainly consisting of Bacillus subtilis saporophytec. In the water treatment method as described in any one of Claim 1 to 3,
A water treatment method, wherein the microorganism comprises a group of microorganisms mainly comprising Cereus species. In the water treatment method according to any one of claims 1 to 4,
A water treatment method, wherein a liquid containing a nutrient for the microorganism is introduced into a micro / nano bubble generator to generate the first micro / nano bubbles. In the water treatment method as described in any one of Claim 1 to 5,
A water treatment method, wherein a liquid containing a nutrient for the microorganism is introduced into a micro / nano bubble generator to generate the second micro / nano bubbles. In the water treatment method according to any one of claims 1 to 6,
A water treatment method, wherein a liquid containing the bubble generation aid is introduced into a micro / nano bubble generator to generate the first micro / nano bubbles. In the water treatment method as described in any one of Claim 1 to 7,
A water treatment method, wherein a liquid containing the bubble generation aid is introduced into a micro / nano bubble generator to generate the second micro / nano bubbles. In the water treatment method as described in any one of Claim 1 to 8,
A water treatment method, wherein a liquid containing both a nutrient for a microorganism and a bubble generation aid is introduced into a micro / nano bubble generator to generate the first micro / nano bubble. The water treatment method according to any one of claims 1 to 9,
A water treatment method, wherein a liquid containing both a nutrient for a microorganism and a bubble generation aid is introduced into a micro / nano bubble generator to generate the second micro / nano bubble. An adjustment tank into which treated water is introduced;
A contact oxidation tank into which treated water from the adjustment tank is introduced;
A discharge pump tank for discharging treated water introduced from the contact oxidation tank to the outside;
A microorganism culture tank into which microorganisms are introduced;
An additive tank for adding at least one of the nutrients for the microorganisms and the bubble generation aid to the microorganism culture tank;
A micro-nano bubble generator for generating a first micro-nano bubble and a second micro-nano bubble having a size smaller than the size of the first micro-nano bubble and supplying the first and second micro-nano bubbles to the microorganism culture tank When,
A micro-nano bubble water supply unit that supplies the microorganism-containing micro-nano bubble water containing the first and second micro-nano bubbles and the microorganism from the microorganism culture tank to at least one of the adjustment tank and the contact oxidation tank. A water treatment device characterized. The water treatment device according to claim 11,
The micro-nano bubble generator is
A vortex pump with a gas shearing section;
A pressurized tank connected to the vortex pump;
A water treatment apparatus comprising: a surplus air tank connected to the pressure tank and attached with a pressure gauge. The water treatment apparatus according to claim 11 or 12,
The microorganism culture tank is
A first mixing and stirring tank to which the first micro / nano bubbles from the micro / nano bubble generator are supplied;
A water treatment apparatus comprising: a second mixing and stirring tank to which second micro / nano bubbles from the micro / nano bubble generator are supplied. In the water treatment equipment according to any one of claims 11 to 13,
The additive tank is
A water treatment apparatus, wherein both the nutrient and the bubble generation aid are added to the microorganism culture tank. In the water treatment equipment according to any one of claims 11 to 14,
A water treatment apparatus, wherein a filler is disposed in the contact oxidation tank. In the water treatment equipment according to any one of claims 11 to 15,
A water treatment apparatus, wherein a polyvinylidene chloride filler is disposed as a filler in the contact oxidation tank. In the water treatment equipment according to any one of claims 11 to 16,
It has a circulation pump that introduces treated water from the contact oxidation tank and returns the treated water to the contact oxidation tank, and has a circulation pump tank that introduces the treated water into the discharge pump tank. Water treatment equipment. In the water treatment equipment according to any one of claims 11 to 16,
The contact oxidation tank is an aeration tank to be aerated,
Furthermore, it has a circulation pump for introducing treated water from the contact oxidation tank and returning the microbial sludge contained in the treated water to the contact oxidation tank, and a settling tank for introducing the treated water to the discharge pump tank. A water treatment apparatus characterized by that. In the water treatment equipment according to any one of claims 11 to 16,
The contact oxidation tank is an aeration nitrification tank that performs aeration and nitrification,
In addition, the treated water from the aeration nitrification tank is introduced, the microbial sludge contained in the treated water is precipitated, returned to the aeration nitrification tank by a circulation pump, and the treated water is introduced into the discharge pump tank. A water treatment apparatus comprising a nitrogen tank. In the water treatment equipment according to any one of claims 11 to 19,
A water treatment apparatus, wherein recycled water flows as the treated water into the adjustment tank. In the water treatment equipment according to any one of claims 11 to 19,
A water treatment apparatus, wherein sewage flows as the treated water into the adjustment tank. In the water treatment equipment according to any one of claims 11 to 19,
A water treatment apparatus in which human urine flows into the adjustment tank as the water to be treated. In the water treatment equipment according to any one of claims 11 to 16,
A submerged membrane is installed inside the water tank of the contact oxidation tank,
A water treatment apparatus for introducing treated water from a submerged membrane of the contact oxidation tank to the discharge pump tank. The water treatment apparatus according to claim 23,
The micro / nano bubble water supply unit
A water treatment apparatus for supplying micro-nano bubble water containing useful microorganisms activated from the microorganism culture tank to the adjustment tank. The water treatment apparatus according to claim 23,
An activated useful microorganism is added to both the adjustment tank and the contact oxidation tank of the water treatment section. The water treatment method according to claim 1 or 2,
A water treatment method, wherein the microorganism comprises a group of microorganisms mainly composed of Bacillus licheniformis. The water treatment method according to claim 1 or 2,
A water treatment method, wherein the microorganism comprises a microorganism group mainly composed of Pseudomonas fluorescens. The water treatment method according to claim 1 or 2,
A water treatment method, wherein the microorganism comprises a microorganism group mainly composed of Pseudomonas putida. The water treatment device according to claim 14, wherein
A water treatment apparatus, wherein the nutrient contains silicon. The water treatment device according to claim 14, wherein
A water treatment apparatus, wherein the nutrient contains potassium. The water treatment device according to claim 14, wherein
A water treatment apparatus, wherein the nutrient contains magnesium. The water treatment device according to claim 14, wherein
A water treatment apparatus, wherein the nutrient contains nitrogen. The water treatment device according to claim 14, wherein
A water treatment apparatus, wherein the nutrient contains phosphorus. The water treatment device according to claim 14, wherein
A water treatment apparatus, wherein the nutrient contains silicon, potassium, magnesium, nitrogen, and phosphorus. The water treatment device according to claim 14, wherein
A water treatment apparatus, wherein the bubble generation aid contains an inorganic salt. The water treatment device according to claim 14, wherein
The water treatment apparatus, wherein the bubble generation aid contains a sodium salt. The water treatment device according to claim 14, wherein
The water treatment apparatus, wherein the bubble generation aid contains a calcium salt. The water treatment device according to claim 14, wherein
The water treatment apparatus, wherein the bubble generation aid contains a potassium salt. The water treatment device according to claim 14, wherein
The water treatment apparatus, wherein the bubble generation aid contains a magnesium salt.

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