JP2009082813A - Water treatment method and apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water treatment method and apparatus which can remarkably improve the treatment capacity of microorganisms. <P>SOLUTION: In the water treatment apparatus, nanobubble-containing water containing a nutrient and receiving application of magnetism is introduced into an aeration tank 6 from a water magnetically activating and nanobubble generating tank 40. Thereby, for example, if decreased by the clogging of a submerged membrane 32 and the like, the treatment capacity of the aeration tank 6 can be returned to normal by the above nanobubble-containing water. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a water treatment method and a water treatment device that contain nutrients in nanobubble-containing water that has been subjected to magnetism and are useful for water treatment of water to be treated. For example, in a more specific example, the present invention generates nano-bubbles with a nano-bubble generator and generates magnetic active water by applying magnetic force lines, and soaks corn as a nutrient containing a well-balanced mineral in the magnetic active water. The present invention relates to a water treatment method and a water treatment apparatus that contain a liquid (corn steep liquor) and raise the state of microorganisms in various water treatments to the highest level. In another example, the present invention takes in magnetically active water containing nutrients and nanobubbles from the pores of activated carbon as a filler, and is the smallest among the smallest bacteria or microorganisms that propagate in the pores of activated carbon. The present invention relates to a water treatment method and a water treatment apparatus that can activate bacteria and microbially decompose organic matter adsorbed by activated carbon.

  Conventionally, a method of performing water treatment using micro / nano bubbles generated by a micro / nano bubble generator has been proposed.

  For example, Patent Document 1 (Japanese Patent Application Laid-Open No. 2004-121962) proposes a nanobubble utilization method and apparatus as a conventional technique. This prior art utilizes characteristics such as a reduction in buoyancy of nanobubbles, an increase in surface area, an increase in surface activity, generation of a local high-pressure field, and an interfacial activity and bactericidal action by realizing electrostatic polarization. More specifically, they can be used to clean various objects with high performance and low environmental load by demonstrating the function of adsorbing dirt components, the high-speed cleaning function of the object surface, and the sterilization function. It discloses that purification of polluted water can be performed.

  Further, another method for generating nanobubbles as a prior art is disclosed in Patent Document 2 (Japanese Patent Laid-Open No. 2003-334548). In this conventional 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) cracking and gasifying a part of the liquid It is comprised from the process and the process of applying an ultrasonic wave.

  Furthermore, a waste liquid treatment apparatus using ozone microbubbles as another prior art is disclosed in Patent Document 3 (Japanese Patent Laid-Open No. 2004-321959). In this prior art, the ozone gas generated from the ozone generator and the 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.

  On the other hand, the conventional wastewater treatment using microorganisms has the following problems (1) to (7).

  (1) Treatment in microorganism treatment becomes unstable due to fluctuations in water temperature depending on the season.

  (2) In particular, organic wastewater from semiconductor factories does not contain the minerals necessary for various microorganisms, so that stable propagation of microorganisms is difficult and microorganism treatment is not stable.

  (3) In a wastewater treatment system using a submerged membrane, when the state of microorganisms deteriorates, the submerged membrane is clogged, the amount of permeated water is reduced, and the treatment capacity is lowered.

  (4) When the state of microorganisms deteriorates, the submerged membrane is clogged, increasing the need for chemical cleaning of the submerged membrane, resulting in an increase in management costs.

  (5) In a microbial treatment system using a submerged membrane, it is difficult to improve the quality of the treated water and improve the treatment capacity of the wastewater treatment equipment.

  (6) The organic fluorine compound-containing water cannot be treated by a simple method.

(7) Organic wastewater generated in large quantities from LCD factories cannot be rationally treated with compact equipment at reduced running costs.
JP 2004-121962 A JP 2003-334548 A JP 2004-321959 A

  Then, the subject of this invention is providing the water treatment method and water treatment apparatus which can improve the processing capability by microorganisms markedly.

In order to solve the above problems, the water treatment method of the present invention contains a nutrient in nanobubble-containing water in which magnetism is applied,
The water treatment is performed by adding nanobubble-containing water containing the nutrient and magnetized to the water to be treated.

  According to the water treatment method of the present invention, the effects of magnetically active water, nanobubbles, and nutrients are exhibited in water treatment, and in particular, when microbial treatment is performed as water treatment, microorganisms are produced by the magnetically active water, nanobubbles, and nutrients. It is activated and the processing capability can be greatly improved as compared with the conventional case.

  Moreover, in the water treatment method of one Embodiment, the said nutrient is an agricultural product immersion liquid.

  According to the water treatment method of this embodiment, since the nutrient is an agricultural product immersion liquid, it contains various minerals, and when microbial treatment is performed as water treatment, it becomes an indispensable mineral of microorganisms. A normal function in processing can be maintained. The agricultural product immersion liquid is, for example, a liquid obtained by immersing agricultural products in water.

  Moreover, in the water treatment method of one embodiment, the agricultural product immersion liquid is a corn immersion liquid (corn steep liquor).

  According to the water treatment method of this embodiment, a particularly well-balanced mineral can be supplied because the nutrient is a corn soak.

  Moreover, in the water treatment method of one Embodiment, the said nutrient is a medicinal plant immersion liquid. In addition, the said medicinal plant immersion liquid is the liquid which immersed the medicinal plant in water, for example.

  According to the water treatment method of this embodiment, various minerals contained in the medicinal plant and medicinal components derived from the medicinal plant can be used as nutrients.

Moreover, in the water treatment apparatus of one embodiment, an aeration tank in which the submerged membrane is installed and the water to be treated is introduced,
The nanobubble-containing water that has been subjected to magnetism is generated and the nanobubble-containing water that has been subjected to magnetism is made to contain a nutrient, and the nanobubble-containing water that contains the nutrient and is magnetized is added to the aeration tank. A magnetically active water nanobubble generation tank to be introduced into
A nutrient tank for supplying a nutrient to the magnetic active water nanobubble generation tank.

  According to the water treatment apparatus of this embodiment, the nanobubble-containing water that contains the nutrient and is magnetized from the magnetically active water nanobubble generation tank is introduced into the aeration tank. Thereby, for example, even if the state of the aeration tank deteriorates due to clogging of the submerged filtration membrane or the like, the state of the aeration tank is contained by the nanobubble-containing water that contains the nutrient and acts magnetically. Can be restored to normal. The submerged filtration membrane is a filtration membrane disposed in the liquid, and an example of the submerged membrane (registered trademark) is a submerged membrane.

  Moreover, in the water treatment apparatus of one Embodiment, the said to-be-processed water is either drainage, reuse water, lake river water, and organic fluorine compound containing water.

  According to the water treatment apparatus of this embodiment, any one of drainage, reuse water, lake and river water, and organic fluorine compound-containing water as the water to be treated can be efficiently and rationally treated. The lake river water represents at least one of lake water and river water.

  Moreover, in the water treatment apparatus of one Embodiment, the filler was installed in the said aeration tank.

  According to this embodiment, the above-mentioned filler installed in the aeration tank is attached to the nano-bubbles containing the above-mentioned nutrients and magnetically acted on the nano-bubble-containing water for a long time, and is useful for treatment among microorganisms. Bacteria can be attached to the filler and the activity of the bacteria can be increased to increase the water treatment capacity.

  Moreover, in the water treatment apparatus of one Embodiment, the said magnetically active water nanobubble generation tank has a magnetic water heater which makes magnetism act on the introduce | transduced water, and a nanobubble generator which generates a nanobubble in the said introduce | transduced water.

  According to this embodiment, in the magnetically active water nanobubble generating tank, the magnetic lines of force from the magnetic active water device and the nanobubbles from the nanobubble generator are combined to generate nanobubble-containing water in which magnetism is applied. Moreover, nanobubbles are efficiently generated by salts and organic substances contained in the nutrient.

  Moreover, in the water treatment apparatus of one Embodiment, the nano bubble generator which the said magnetic active water nano bubble generation tank has has two or more gas shearing parts.

  According to the water treatment apparatus of this embodiment, the nanobubble generator can produce a large amount of nanobubbles by two or more gas shearing sections, and at the same time, can enhance the oxidizing action by free radicals attached to the nanobubbles.

  Moreover, in the water treatment apparatus of one Embodiment, the corn immersion liquid (corn steep liquor) is added to the said nutrient tank as said nutrient.

  According to the water treatment apparatus of this embodiment, a well-balanced mineral can be easily added to the water treatment apparatus by the corn soaking liquid (corn steep liquor). That is, on the other hand, it can be used as an effective utilization destination of the corn soaking solution, and the effective utilization of resources can be enabled.

  Moreover, in the water treatment apparatus of one Embodiment, it has a treated-water introduction part which introduces into the said magnetic active water nanobubble generation tank the treated water filtered with the said submerged membrane in the said aeration tank.

  According to the water treatment apparatus of this embodiment, since the treated water after filtering through the submerged membrane is introduced into the magnetically active water nanobubble generation tank, the nanobubble generator itself due to suspended solids, which is a weak point of the nanobubble generator Blockage phenomenon can be prevented.

Moreover, in the water treatment device of one embodiment, a submerged filtration membrane pump for deriving filtered water from the submerged filtration membrane,
An operation pressure gauge for detecting the operation pressure of the submerged membrane pump,
And an operation control unit that controls the operation of the nanobubble generator of the magnetically active water nanobubble generation tank based on the operation pressure detected by the operation pressure gauge.

  According to the water treatment apparatus of this embodiment, the abnormality of the aeration tank can be automatically sensed with the operation pressure detected by the operation pressure gauge, and by the operation control of the nanobubble generator by the operation control unit, It is possible to cope with the abnormality of the aeration tank. For example, when the state of microorganisms in the aeration tank deteriorates, a phenomenon occurs in which the submerged filtration membrane in the aeration tank is blocked by microbial sludge due to microbial clumps. When the submerged membrane is blocked, the operating pressure rises. Therefore, by detecting the operating pressure, the submerged membrane can be detected as a clogging phenomenon. By controlling the nanobubble generator to operate in the operation control unit, the microbial state in the aeration tank can be improved.

Moreover, in the water treatment apparatus of one embodiment, an adjustment tank into which treated water is introduced,
A regulating tank pump for introducing the treated water from the regulating tank to the aeration tank;
A submerged membrane pump for extracting filtrate from the submerged membrane,
An operation pressure gauge for detecting the operation pressure of the submerged membrane pump,
An operation control unit that controls the operation of the adjustment tank pump based on the operation pressure detected by the operation pressure gauge.

  According to the water treatment apparatus of this embodiment, since the operation control unit controls the operation of the adjustment tank pump based on the operation pressure detected by the operation pressure gauge, when the operation pressure increases. The amount of water flowing into the aeration tank and the amount of outflow water from the aeration tank can be automatically controlled by controlling the discharge amount of the adjustment tank pump.

Moreover, in the water treatment device of one embodiment, a submerged filtration membrane pump for deriving filtered water from the submerged filtration membrane,
An outflow capable of a first operation for flowing out the filtrate water derived from the submerged membrane pump as treated water and a second operation for returning the filtrate water derived from the submerged membrane pump to the magnetically active nanobubble generation tank A return section;
An operation pressure gauge for detecting the operation pressure of the submerged membrane pump,
An operation control unit that controls the outflow return unit to perform any one of the first operation and the second operation based on the operation pressure detected by the operation pressure gauge.

  According to the water treatment apparatus of this embodiment, the outflow return unit is controlled according to the level of the operation pressure of the submerged membrane pump, and the filtrate derived from the submerged membrane pump is caused to flow out as treated water. It is possible to select whether to return the filtered water derived by the submerged membrane pump to the magnetically active water nanobubble generation tank. For example, when the operating pressure of the submerged membrane pump suddenly increases due to a sudden deterioration of the state of microorganisms in the aeration tank, the quality of treated water is also deteriorated. For this reason, the said operation control part controls the said outflow return part, and returns the filtrate extracted with the said submerged membrane pump to the said magnetic active water nanobubble generation tank. On the other hand, when the operation pressure is lower than the set value and the submerged membrane is almost not clogged, the quality of the treated water is good, so the operation control unit controls the outflow return unit, The filtered water derived from the submerged membrane pump is discharged as treated water. Thereby, the whole water treatment apparatus including the aeration tank can be rationally operated, maintained, and managed according to the quality of the treated water.

  In one embodiment of the water treatment apparatus, a contact aeration tank in which activated carbon is filled in the tank, a rapid filtration tower in which the activated carbon is partially filled in the tower, and an activated carbon adsorption tower in the latter stage of the aeration tank. And are installed in order.

  According to this embodiment, the nanobubble-containing treated water containing a nutrient and magnetized from the aeration tank is sequentially introduced into the contact aeration tank, the rapid filtration tower, and the activated carbon adsorption tower, and the nanobubble is in the contact It can be introduced continuously into activated carbon in an aeration tank, rapid filtration tower, and activated carbon adsorption tower. Therefore, since the said nano bubble raises the activity of the microorganisms propagated on the said activated carbon, processing efficiency can be improved. Also, microorganisms propagated on the activated carbon are activated and adsorbed on the activated carbon, so that organic substances can be decomposed microbiologically. Moreover, the organic substance adsorbed by each activated carbon can be decomposed by an oxidizing action by free radicals attached to the nanobubbles.

  Moreover, in the water treatment apparatus of one Embodiment, the said filler installed in the said aeration tank is a polyvinylidene chloride filler or activated carbon.

  According to the water treatment apparatus of this embodiment, the nanobubble-containing treated water nanobubbles containing a nutrient and magnetized adhere to the polyvinylidene chloride filling or activated carbon. As a result, the microorganisms propagated on the polyvinylidene chloride filler or activated carbon can be activated, and at the same time, the water treatment capacity can be improved.

  Moreover, in the water treatment apparatus of one Embodiment, the said magnetic water heater has a permanent magnet or an alternating current magnetism generation part.

  According to the water treatment apparatus of this embodiment, when the permanent magnet is provided, magnetism that does not require a power source and does not change the pole can be applied to the introduced water. On the other hand, in the case of having the AC magnetic field generation unit, it is possible to act on the introduced water with magnetism that requires a power source but whose poles (S pole and N pole) change.

  In the water treatment method of the present invention, a nutrient is contained in nanobubble-containing water subjected to magnetism, and the water is treated by adding the nanobubble-containing water subjected to magnetism while containing the nutrient to water to be treated. Therefore, the effects of magnetically active water, nanobubbles and nutrients are exhibited in water treatment, and in particular, when microbial treatment is performed as water treatment, microorganisms are activated by the magnetically active water, nanobubbles and nutrients, compared to the conventional case. The processing capacity can be greatly improved.

  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 nutrient-containing magnetic nanobubble water treatment device 49 as a first embodiment of the water treatment device of the present invention.

  The nutrient-containing magnetic active water nanobubble water treatment device 49 is mainly composed of a nutrient-containing magnetic active water nanobubble generation tank 40 having the adjustment tank 1 and the magnetic active water nanobubble generator 48, the nutrient tank 24, the aeration tank 6, and the like. ing.

  First, wastewater as treated water is introduced into the adjustment tank 1 from the inflow pipe 2. There are many types of wastewater, but organic wastewater in semiconductor factories and liquid crystal factories is one of the suitable wastewaters because it contains almost no minerals necessary for microorganisms when treating microorganisms. is there.

  In any case, this embodiment is suitable when the wastewater is treated with microorganisms and the components in the wastewater contain no mineral, or even if contained, the content is small.

  The water to be treated whose water amount and quality are adjusted in the adjustment tank 1 is introduced into the aeration tank 6 through the discharge pipe 4 by the adjustment tank pump 3.

  The aeration tank 6 corresponds to an aeration tank used in an ordinary waste water treatment apparatus. In the first embodiment, a liquid for separating microorganisms and treated water, that is, solid-liquid separation, in the water tank of the aeration tank 6. The middle film 32, the diffuser pipe 34 for cleaning the submerged film (registered trademark) 32 with air, the diffuser pipe 37 for stirring the air inside the aeration tank 6, and the air for connecting the diffuser pipe 34 and the blower 36 The pipe 35 is composed of an air pipe 39 for connecting the diffuser pipe 37 and the blower 36. Instead of the submerged membrane 32, other types of filtration membranes (for example, ultrafiltration membranes, microfiltration membranes, etc.) can be employed.

  Normally, when the state of microorganisms in the aeration tank 6 is good, microbial sludge, which is a mass of microorganisms, is operated without blocking the submerged membrane 32. That is, the submerged membrane 32 is connected to the submerged membrane pump 29 through a water pipe, and the operation pressure of the submerged membrane pump 29 detected by the operation pressure gauge 28 is operated in a state lower than a predetermined value.

  Normally, the operation is detected with the operation pressure detected by the operation pressure gauge 28 being lower than a predetermined value. In this case, when the pressure signal indicating the operation pressure detected by the operation pressure gauge 28 is input to the operation pressure controller 27 serving as a control unit, the electric valve 30 is controlled by the control signal output from the operation pressure controller 27. Is closed and the electric valve 31 is open, and the treated water is discharged to the outside. The electric valves 30 and 31 constitute an outflow return part.

  On the other hand, if the state of microorganisms in the aeration tank 6 is poor, microbial sludge, which is a mass of microorganisms, tends to block the submerged membrane 32, making it difficult to secure treated water. In this case, the operation pressure of the submerged membrane pump 29 detected by the operation pressure gauge 28 becomes higher than a predetermined value, and the ability as a wastewater treatment device is reduced.

  When the operation pressure of the submerged membrane pump 29 detected by the operation pressure gauge 28 is higher than a predetermined value, it is considered that the state of microorganisms in the aeration tank 6 has deteriorated. The cause of the deterioration of the state of microorganisms is mainly the lack of minerals in the wastewater, or the absence of minerals in the wastewater. Therefore, it is necessary to add the missing mineral. Since organic wastewater in semiconductor factories and liquid crystal factories does not contain minerals in a well-balanced manner, in this embodiment, nutrients are added to improve the state of microorganisms.

  For example, there is a corn steep liquor as a nutrient that is economically low in cost and contains almost all the minerals required by microorganisms. As an example, the composition of the stock solution of corn soaked liquid (corn steep liquor) (product of Oji Cornstarch Co., Ltd.) is TOC (total organic carbon) 160000, TP (total phosphorus) 23000, TN (Total nitrogen) is 42000, K (potassium) is 18000, Mg (magnesium) is 11000, Na (sodium) is 2600, Ca (calcium) is 400, Si (silica) is 200, and Fe (iron) is 320. . The unit of each numerical value is mg / liter.

  In addition, the corn soaking liquid (corn steep liquor) as the nutrient is merely an example, and other agricultural product soaking liquid or medicinal plant soaking liquid may be used. For example, the nutrient may be a liquid, an agricultural product such as a vegetable or a fruit, and discarded. For example, it may be vegetable waste or garbage to be discarded. In this case, the resource is effectively used, and the waste resource is preferably used. Further, as the nutrient, basically any material can be used as long as it is a plant-derived material.

  However, when the operating pressure of the submerged membrane pump 29 detected by the operating pressure gauge 28 is higher than a predetermined value, the electric valve 31 is closed and the electric valve 30 is opened, and the submerged membrane 32 is filtered. The treated water is introduced (returned) to the nutrient-containing magnetic active water nanobubble generation tank 40 through the submerged membrane water pipe 22. Along with this, the operation pressure gauge 28 operates the nutrient tank pump 25 attached to the nutrient tank 24 to operate the corn soaked liquid stored in the nutrient tank 24. It is added to the nutrient-containing magnetic active water nanobubble generation tank 40 through the water pipe 26. In the nutrient tank 24, the corn soaking liquid is diluted and stirred by the stirrer 23 and stored. Further, the operation pressure gauge 28 operates a magnetic active water nanobubble generator 48 installed attached to the outside of the nutrient-containing magnetic active water nanobubble generation tank 40. Thereby, in this nutrient-containing magnetic active water nanobubble generating tank 40, the submerged membrane treated water introduced from the aeration tank 6 is made to contain a nutrient, acts magnetically, and contains nanobubbles. Is generated.

  The nanobubble-containing magnetic active water generated in the nutrient-containing magnetic active water nanobubble generating tank 40 is introduced into the aeration tank 6 through the overflow pipe 21.

  Here, the generation mechanism of magnetic active water nanobubbles and magnetic active water nanobubbles will be described. The nanobubble-containing magnetic active water can be produced by a magnetic active water nanobubble generator 48 having a magnetic water heater 47. A magnetically active water nanobubble generator 48 installed attached to the outside of the nutrient-containing magnetically active water nanobubble generating tank 40 includes a gas-liquid mixing circulation pump 7 having a first gas shearing part 8, a second gas shearing part 9, and a magnetic field. It is comprised from the water heater 47, the 3rd gas shearing part 20, the electric needle valve 17 for introduce | transducing air, and piping 16,19,39 which connects them.

  Moreover, the magnetic water heater 47 is installed between the flange 10 and the flange 15, and the liquid passage portion 14 having a thickness of 30 mm or less is formed in a flat plate shape having a thickness of 30 mm or less inside the magnetic water heater 47. . In addition, three S poles 12 and N poles 11 of magnets are provided with a flat liquid passage 14 interposed therebetween, and magnetic lines 13 are provided between the S pole 12 and the N pole 11. The strength of the magnetic field lines is about 1000 gauss at the center of the liquid passage portion 14. Although the magnet is a permanent magnet here, it may be an electromagnet. Moreover, it is good also as an alternating current magnetism generation part which generate | occur | produces alternating current magnetism in the said liquid passage part 14 instead of the said magnet.

  Then, when the gas-liquid mixing circulation pump 7 having the first gas shearing portion 8 is operated, the treated water from the submerged film 32 is introduced from the first gas shearing portion 8 to the second gas shearing portion 9. The gas is sheared, that is, the microbubbles are sheared to produce nanobubbles in part. Here, air is introduced into the first gas shearing portion 8 under the condition that the electric needle valve 17 is open. This introduction of air is performed after 60 seconds or more after the gas-liquid mixing and circulating pump 7 is operated. That is. The reason is that if air is introduced from the beginning of the operation of the gas-liquid mixing circulation pump 7 under the condition that the electric needle valve 17 is opened, the gas-liquid mixing circulation pump 7 causes a cavitation phenomenon, and the gas-liquid mixing circulation pump 7 It is because it is damaged. The treated water as the liquid exiting from the gas-liquid mixing circulation pump 7 is introduced into the second gas shearing section 9, where the gas is sheared, that is, the microbubbles are sheared to produce some nanobubbles.

  Next, the mechanism of the magnetic active water nanobubble generator 48 will be described in detail. As described above, the magnetic active water nanobubble generator 48 includes the gas-liquid mixing and circulation pump 7, the first gas shearing unit 8, the second gas shearing unit 9, the magnetic active water device 47, the third gas shearing unit 20, and the electric needle valve 17. And piping connecting them. In the magnetically active water nanobubble generator 48, the nanobubbles are mainly manufactured through the first stage and the second stage.

  First, the first stage will be briefly described. In the first gas shearing portion 8, the pressure is controlled hydrodynamically, gas is sucked from the negative pressure forming portion, the fluid is moved at a high speed, the negative pressure portion is formed, and microbubbles are generated. In a simple and easy-to-understand manner, the first step is to produce microbubble cloudy water containing useful substances by effectively self-sufficiency, mixing, dissolving and pumping water and air.

  Next, the second stage will be briefly described. The above-mentioned useful substance-containing microbubbles are introduced into the second gas shearing part 9 and the third gas shearing part 20 through the water pipes 39 and 19, and the second gas shearing part 9 and the third gas shearing part 20 are subjected to high-speed fluid motion, By forming a negative pressure portion and shearing as a fluid motion, nanobubbles are generated from microbubbles.

  Next, the first stage and the second stage in the magnetically active water nanobubble generator 48 will be described in further detail.

(First stage)
The gas-liquid mixing / circulation pump 7 used in the magnetically active water nanobubble generator 48 is a high-lift pump having a lift of 40 m or higher (that is, a high pressure of 4 kg / cm ² ). That is, it is preferable to select a gas / liquid mixing / circulation pump 7 having the first gas shearing portion 8 that has a high head and has a stable torque. There are two-pole and four-pole pumps, and the torque of the 2-pole pump is more stable than the 4-pole pump.

  Further, the gas-liquid mixing circulation pump 7 needs to control the pressure, and the rotation speed of this high-lift pump is controlled to a desired pressure by a rotation speed controller generally called an inverter. Yes. With the pressure suitable for this purpose, it is possible to manufacture microbubbles with a bubble size. Here, the mechanism of microbubble generation in the gas-liquid mixing circulation pump 7 having the first gas shearing portion 8 will be described. In the first gas shearing portion 8, in order to generate microbubbles, a mixed-phase swirling flow of liquid and gas is generated, and a gas cavity that swirls at a high speed is formed at the center of the first gas shearing portion 8. Next, this gas cavity is thinned into a tornado shape by pressure to generate a rotating shear flow that swirls at a higher speed. Air as a gas is automatically supplied to the cavity using a negative pressure (negative pressure), and the mixed phase flow is rotated while being cut and pulverized. This cutting and crushing occurs due to the difference in the swirling speed of the gas-liquid two-phase fluid inside and outside in the vicinity of the apparatus outlet. The rotation speed at that time is 500 to 600 rotations / second. In addition, although the said gas was just air in this embodiment, the carbon dioxide gas, nitrogen gas, oxygen gas, ozone gas can also be selected according to the objective, and other gas can also be selected.

  In this way, in the first gas shearing portion 8, by controlling the pressure hydrodynamically, the gas is sucked from the negative pressure forming portion, and the fluid is moved at high speed by the high lift pump to form the negative pressure portion, Generate microbubbles. To explain more easily and simply, the first step is to produce micro-bubble cloudy water by effectively self-suppliing, mixing, dissolving and pumping water and air with a high head pump.

  The operation of the gas-liquid mixing circulation pump 7 is controlled by a control signal input from a sequencer (not shown). Moreover, although the internal shape of the 1st gas shearing part 35 is an ellipse as an example, it is a perfect circle as a shape which can exhibit the maximum effect. Further, the first gas shearing portion 35 has a mirror finish to reduce the internal friction. In this embodiment, a groove having a groove depth of 0.3 mm to 0.6 mm and a groove width of 0.8 mm or less is provided in the first gas shearing portion 35 in order to control the swirling turbulent flow of the fluid.

(Second stage with magnetic active water nanobubble generator)
The microbubbles generated by the gas-liquid mixing circulation pump 7 having the first gas shearing part 8 are pumped to the second gas shearing part 9 through the water pipe 39. In the second gas shearing portion 9 and the third gas shearing portion 20 after the first stage, the pipe size is further reduced and the fluid is moved at high speed to make the gas cavity narrower in a tornado shape. Generate a rotating shear flow that swirls at a higher speed. As a result, nanobubbles are generated from the microbubbles, and at the same time, an extremely high temperature limit reaction field is formed. The reason why the second gas shearing part 9 and the third gas shearing part 20 are constructed is that the construction of the gas shearing part in two stages is larger than the construction of the gas shearing part in one stage. This is because it can occur. That is, when an ultra-high temperature extreme reaction field is formed, a high temperature and high pressure state is locally generated, unstable free radicals are formed, and heat is simultaneously generated.

  The second gas shearing portion 9 and the third gas shearing portion 20 are generally made of stainless steel, and the shape thereof is an ellipse, preferably a perfect circle. Moreover, although the small hole is opened in the 2nd gas shear part 9 and the 3rd gas shear part 20, the discharge port diameters are 4 mm-9 mm optimal.

  Next, the high speed fluid motion in the first stage described above will be described. In order to generate microbubbles in the first gas shearing section 8, first, as a “high-speed fluid motion”, a wing called a pump impeller is rotated at a very high speed to generate a mixed phase swirl of liquid and gas. And a gas cavity that swirls at a high speed is formed at the center of the first gas shearing portion 8. Next, this gas cavity is thinned into a tornado shape by pressure to generate a rotating shear flow that swirls at a higher speed. This gas cavity is self-supplied with air as a gas. The gas may be oxygen gas. Further, the multiphase flow is rotated while cutting and pulverizing the gas cavity. This cutting and crushing occurs due to the difference in the swirling speed of the gas-liquid two-phase fluid inside and outside in the vicinity of the apparatus outlet. The rotation speed has been found to be 500-600 rotations / second. When the thickness of the metal constituting the first gas shearing portion 8 is thin, the gas-liquid mixing and circulation pump 7 is operated to generate vibration, and the fluid kinetic energy propagates to the outside as vibration and escapes. This reduces the required high velocity flow motion, i.e., high speed swirl and shear energy. Therefore, the thickness of the metal constituting the first gas shearing portion 8 is preferably in the range of 6 mm to 12 mm.

    Next, “shearing as a fluid motion” will be described. The microbubbles generated by the gas-liquid mixing circulation pump 7 having the first gas shearing part 8 are pumped to the second gas shearing part 9 and the third gas shearing part 20 through the water pipes 39 and 19. In the second gas shearing portion 9 and the third gas shearing portion 20 after the first stage, the pipe size is reduced, and the fluid is moved at high speed to make the gas cavity narrower in a tornado shape, thereby increasing the speed. Rotating shear flow that swirls at is generated.

  Next, the “negative pressure forming portion” will be described. The “negative pressure forming portion” is generated due to the difference in the swirling speed of the gas-liquid two-phase fluid inside and outside in the vicinity of the apparatus outlet. As described above, the rotation speed is 500 to 600 rotations / second. Next, the “negative pressure part” will be described. This “negative pressure part” means a region in the gas-liquid mixture where the pressure is lower than the surroundings. The above is the mechanism of the magnetically active water nanobubble generator 48.

  In the first embodiment, the control tank pump 3 outputs a control signal to the adjustment tank pump 3 via the signal line 5 based on the operation pressure of the submerged film 32 detected by the operation pressure gauge 28. By controlling the discharge amount 3, the amount of water flowing from the adjustment tank 1 to the aeration tank 6 and the amount of water flowing out of the aeration tank 6 are automatically controlled.

  As the magnetic active water nanobubble generator 48, a commercially available one can be adopted, but the manufacturer is not limited. As a specific example, the magnetic water heater 47 is a BK type BK manufactured by BCE, Inc. -50 can be adopted. In addition, as a nanobubble generator, Babytas HYK-32, a product of Kyowa Kikai Co., Ltd., can be used.

  Here, three types of bubbles will be described.

  (1) A normal bubble (bubble) rises in the water and finally disappears by popping on the surface.

  (2) When microbubbles are generated, they are fine bubbles having a bubble diameter of 10 to several tens of μm, shrink in water, and eventually disappear (completely dissolve). Microbubbles change to “micronanobubbles” by contraction movement after generation.

  (3) Nanobubbles are bubbles (diameters of several hundred nm or less) that are even smaller than microbubbles and can exist in water indefinitely. It is said.

  A micro-nano bubble can be described as a bubble in which micro-bubbles and nano-bubbles are mixed, and is a bubble having a diameter of about 10 μm to several hundreds of nm.

(Second embodiment)
Next, FIG. 2 shows a second embodiment of the water treatment apparatus of the present invention. In the second embodiment, a contact aeration tank 50, a rapid filtration tower 51, and an activated carbon adsorption tower 52 are installed in the subsequent stage of the aeration tank 6 of the nutrient-containing magnetic active water nanobubble water treatment device 49 of the first embodiment described above. Only the points described above are different from the first embodiment described above. Therefore, in the second embodiment, the same parts as those of the first embodiment described above are denoted by the same reference numerals, detailed description thereof will be omitted, and parts different from those of the first embodiment will be described.

  In this 2nd Embodiment, the treated water from the said aeration tank 6 is introduce | transduced into the contact aeration tank 50, the rapid filtration tower 51, and the activated carbon adsorption tower 52 in order, and the treated water is processed further. Therefore, according to the second embodiment, it is possible to construct a wastewater treatment apparatus in an area where discharge regulation is considerably severe.

  That is, according to this embodiment, the nanobubble-containing treated water containing nutrients and magnetized from the aeration tank 6 is sequentially introduced into the contact aeration tank 50, the rapid filtration tower 51, and the activated carbon adsorption tower 52. Then, nanobubbles can be introduced continuously into the activated carbon in the contact aeration tank 50, the rapid filtration tower 51, and the activated carbon adsorption tower 52.

  For example, if activated carbon is filled in each of the contact aeration tank 50, the rapid filtration tower 51, and the activated carbon adsorption tower 52, the processing performance is improved as compared with the conventional contact aeration tank, rapid filtration tower, and activated carbon adsorption tower. . The reason is that the microorganisms propagated on the activated carbon are activated and adsorbed on the activated carbon, so that the organic matter can be decomposed microbiologically. As an example, the pores of activated carbon and the microorganisms that contribute to the treatment are approximately the same size. Thus, since the said nano bubble raises the activity of the microorganisms propagated on the said activated carbon, processing efficiency can be improved. Also, magnetically active water nanobubbles enter into the pores of the activated carbon, and the organic matter adsorbed by the activated carbon can be decomposed by the oxidizing action by free radicals attached to the nanobubbles.

  Moreover, in this 2nd Embodiment, since the to-be-processed water is processed highly, it can also be reused for another use. In particular, in the second embodiment, magnetically active water nanobubbles (nanobubbles existing in the water in which magnetism is applied) remain in the treated water, and these magnetically active water nanobubbles are continuously present in water for 4 weeks or more. Therefore, it is possible to affect the subsequent processing equipment.

(Third embodiment)
Next, FIG. 3 shows a third embodiment of the water treatment apparatus of the present invention. The third embodiment differs from the first embodiment only in that the waste water that is the inflow water in the first embodiment is replaced with reused water. 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, since the inflow water is reused water, when the concentration of organic matter in the reuse water suddenly increases or a substance harmful to microorganisms flows in, the state of microorganisms in the aeration tank 6 It becomes a corresponding water treatment device that can cope with deterioration. In this 3rd Embodiment, since it can be such a corresponding water treatment apparatus, even if the water quality of inflow reuse water changes, the quality of treated water can be stabilized and treated water can be reused. . A specific example of this reused water is organic material-containing reused water in semiconductor factories and liquid crystal factories where a large amount of reused water exists.

(Fourth embodiment)
Next, FIG. 4 shows a fourth embodiment of the water treatment apparatus of the present invention. The fourth embodiment is different from the first embodiment only in that the drainage that is the inflow water in the first embodiment is replaced with lake water. 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, since the inflow water is lake river water, the organic matter concentration in the lake river water suddenly rises for some reason, or the substance harmful to microorganisms flows into the microorganism in the aeration tank 6. It becomes a corresponding water treatment device that can cope with the situation of the worsening. Since this 4th Embodiment can be such a corresponding | compatible water treatment apparatus, even if the water quality of inflow lake water is changed, the quality of treated water can be stabilized and treated water can be used. That is, according to this 4th Embodiment, the water treatment apparatus in a water purification plant is realizable as a specific example.

(Comparative example)
Next, FIG. 5 shows a comparative example of the water treatment apparatus of the present invention. This comparative example is different from the first embodiment described above in that the magnetic water heater 47 in the first embodiment is deleted. Therefore, in this comparative example, 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 this comparative example, since the magnetic water heater 47 in the first embodiment is omitted, the effect of the magnetic water heater 47 cannot be expected. However, according to this comparative example, there is an effect that the initial cost can be considerably reduced.

  As an effect of the magnetic water purifier 47, the magnetic lines 13 are present inside the liquid passage portion 14 of the magnetic active unit 47. When the liquid flows through the magnetic lines, a weak current is generated. Then, a liquid such as water containing the weak current is introduced into the aeration tank 6 to activate the microorganisms with the force of the magnetic lines of force.

  In this comparative example, the effect of the magnetic water heater 47 cannot be expected. Therefore, in this comparative example, only the action of the nutrient-containing nanobubbles by the nanobubble generator is exhibited, but depending on the water content of the wastewater, there may be a sufficient water treatment device.

(Fifth embodiment)
Next, FIG. 6 shows a fifth embodiment of the present invention. The fifth embodiment is different from the first embodiment only in that a string-like polyvinylidene chloride filler 41 as a filler is filled in the water tank of the aeration tank 6 in the first embodiment. Different. Therefore, in the fifth embodiment, the same portions as those in the first embodiment are denoted by the same reference numerals, detailed description thereof is omitted, and portions different from those in the first embodiment are described.

  In the fifth embodiment, a string-type polyvinylidene chloride filler 41 as a filler is attached to a fitting 43 and filled in the water tank of the aeration tank 6. As a result, nanobubbles (nutrient-containing magnetically active water nanobubbles) containing nanobubbles containing nutrients and magnetized adhere to the string-like polyvinylidene chloride filler 41 and are fixed and last for a long time. It will be. Further, bacteria as microorganisms effective for the treatment also adhere to and propagate on the string-like polyvinylidene chloride filler 41.

  As a result, both bacteria and nutrient-containing magnetic nanobubbles adhere to the string-like polyvinylidene chloride filler 41, and the activity of bacteria effective for treatment increases, so that the treatment capacity of the aeration tank 6 is improved. It will be.

(Sixth embodiment)
Next, FIG. 7 shows a sixth embodiment of the water treatment apparatus of the present invention. The sixth embodiment differs from the fifth embodiment only in that the waste water that is the inflow water in the fifth embodiment is replaced with reused water. Therefore, in the sixth embodiment, the same parts as those in the above-described fifth embodiment are denoted by the same reference numerals, detailed description thereof will be omitted, and parts different from those in the above-described fifth embodiment will be described.

  In this sixth embodiment, since the inflow water is reused water, the state of microorganisms in the aeration tank 6 when the concentration of organic substances in the reused water suddenly increases or when substances harmful to microorganisms flow in. It becomes a corresponding water treatment device that can cope with deterioration. In this sixth embodiment, since it can be such a corresponding water treatment apparatus, even if the quality of the inflow reused water changes, the quality of the treated water can be stabilized and the treated water can be reused. Become. Specific examples of the reused water include organic matter-containing reused water in semiconductor factories and liquid crystal factories where a large amount of reused water exists.

(Seventh embodiment)
Next, FIG. 8 shows a seventh embodiment of the present invention. In the eighth embodiment, only the point that the ring-type polyvinylidene chloride filling 42 as a filler is filled in the mesh container 44 in the water tank of the aeration tank 6 in the above-described fourth embodiment is described above. This is different from the seventh embodiment. 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 described.

  In the seventh embodiment, a ring-type polyvinylidene chloride filler 42 as a filler is filled in the water tank of the aeration tank 6. Therefore, in the seventh embodiment, the nutrient-containing magnetically active water nanobubbles adhere to the ring-type polyvinylidene chloride filler 42 and are immobilized for a long time. In addition, bacteria as microorganisms effective for treatment adhere to and propagate on the ring-type polyvinylidene chloride filler 42. As a result, both bacteria and nutrient-containing magnetic nanobubbles adhere to the ring-type polyvinylidene chloride filler 42, and the activity of bacteria effective for the treatment increases, so that the treatment capacity of the aeration tank 6 is improved. become.

(Eighth embodiment)
Next, FIG. 9 shows an eighth embodiment of the water treatment apparatus of the present invention. The eighth embodiment differs from the seventh embodiment in that the lake water as the inflow water in the seventh embodiment is replaced with organic fluorine compound-containing water. In the seventh embodiment described above, the ring-type polyvinylidene chloride filler 42 filled in the mesh container 44 is arranged in the aeration tank 6, whereas in the eighth embodiment, the mesh bag 45 is provided in the mesh bag 45. The point which the accommodated activated carbon 46 is filled in the aeration tank 6 differs from the above-mentioned 7th Embodiment. Therefore, in the eighth embodiment, the same parts as those in the above-described seventh embodiment are denoted by the same reference numerals, detailed description thereof will be omitted, and parts different from those in the above-described seventh embodiment will be described.

  In the eighth embodiment, the activated carbon 46 is accommodated in the net bag 45 and installed in the aeration tank 6. In the eighth embodiment, it has been experimentally found that the organic fluorine compound in the water containing the organic fluorine compound as the influent water is adsorbed by the activated carbon 46.

  Therefore, in the eighth embodiment, the organic fluorine compound in the water containing the organic fluorine compound is adsorbed on the activated carbon 46, and the nanobubbles in the magnetically active water nanobubbles activate the microorganisms propagated on the activated carbon, and the organic fluorine adsorbed on the activated carbon. The compound can be decomposed. In addition, the organic fluorine compound adsorbed by the activated carbon can be decomposed by an oxidation action by free radicals accompanying the nanobubbles (magnetically active water nanobubbles) existing in the water subjected to magnetism.

  Therefore, according to the eighth embodiment, the organic fluorine compound-containing water can be treated.

(Experimental example)
Corresponding to the water treatment apparatus of the first embodiment shown in FIG. 1, the capacity of the adjustment tank 1 is 2 m ³ , the capacity of the aeration tank 6 is 4 m ³ , and the nutrient-containing magnetic active water nanobubble generation tank 40 capacity is 1 m ^3, the capacity of the nutrient tank 24 is 0.8 m ^3, the electric motor of the gas-liquid mixture circulating pump 7 as a specification of 2.2 kw, were fabricated nutrient-containing magnetic water activator nanobubble water treatment apparatus 49 . Then, the developer-containing wastewater discharged from the semiconductor factory was introduced into the nutrient-containing magnetic active water nanobubble water treatment device 49 to conduct a treatment experiment. The developer-containing wastewater discharged from the semiconductor factory does not contain various minerals required by microorganisms.

When the nutrient-containing magnetic active water nanobubble generation tank 40 is not operated, the trial operation of the nutrient-containing magnetic active water nanobubble water treatment device 49 is started, and after about four months, the treatment capacity of the submerged membrane 32 is started. The initial processing capacity was reduced to about 50% (0.6 m ³ / day), and the operating pressure of the submerged membrane pump 29 was increased to 160% compared to the initial pressure. The microbial sludge in the aeration tank 6 at this time was sampled as a sample A.

Then, in this nutrient-containing magnetic active water nanobubble water treatment device 49, the nutrient-containing magnetic active water nanobubble generation tank 40 is operated, and the operation pressure of the submerged membrane pump 29 is compared with the initial pressure. When the concentration exceeds 150% (30 kPa / 30 kPa), the system is configured such that the nutrient-containing magnetic active water nanobubbles are automatically added from the nutrient-containing magnetic active water nanobubble generation tank 40 to the aeration tank 6. . For this reason, within a few days after operation, there is a tendency for operating pressure (20 kPa / 20 kPa) and recovery of processing capacity (1.2 m ³ / day). The ability has returned. The microbial sludge in the aeration tank 6 at this time was sampled as a sample B.

  In order to compare the filtration performance of the microbial sludge sample A and the microbial sludge sample B, the filtration amount of the microbial sludge on the filter paper per fixed time (5 minutes) and the water quality of the filtrate were measured and compared. As a result, the microbial sludge sample A at the time of abnormality in the aeration tank 6 had a filtration amount of 8 ml with a filter paper in 5 minutes, and a total organic carbon (TOC) as the water quality of the filtrate was 96 ppm. On the other hand, the normal microbial sludge sample B had a filtration amount of 16 ml with a filter paper in 5 minutes and a total organic carbon (TOC) of 42 ppm as the water quality of the filtrate.

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

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Adjustment tank 2 Inflow piping 3 Adjustment tank pump 4 Discharge piping 5 Signal line 6 Aeration tank 7 Gas-liquid mixing circulation pump 8 1st gas shear part 9 2nd gas shear part 10 Flange 11 N pole 12 S pole 13 Magnetic field line 14 Liquid passage Part 15 Flange 16 Air pipe 17 Electric needle valve 18 Suction pipe 19 Water pipe 20 Third gas shearing part 21 Overflow pipe 22 Submerged membrane water pipe 23 Stirrer 24 Nutrient tank 25 Nutrient tank 26 26 Water pipe 27 Operation pressure adjustment Total 28 Operation pressure gauge 29 Submerged membrane pump 30 Electric valve 31 Electric valve 32 Submerged membrane 33 Air bubble 34 Air diffuser pipe 35 Air pipe 36 Blower 37 Air diffuser pipe 38 Water flow 39 Air pipe 40 Nutrient-containing magnetic active water nanobubble generation tank 41 String Type Polyvinylidene Chloride Filler 42 Ring Type Polyvinylidene Chloride Filler 43 Mounting Bracket 44 Mesh 45 net bag 46 activated carbon 47 magnetic water activator 48 magnetic water activator nano bubble generator 49 nutrient-containing magnetic water activator nanobubble water treatment apparatus 50 contact aeration tank 51 rapid filtration tower 52 activated carbon adsorption tower

Claims (17)

Incorporating nutrients into nanobubble-containing water that has been magnetized,
The water treatment method characterized by adding the nanobubble containing water which contained this nutrient and made the magnetism act on the to-be-treated water. The water treatment method according to claim 1,
The water treatment method, wherein the nutrient is an agricultural product immersion liquid. The water treatment method according to claim 2,
The water treatment method, wherein the agricultural product immersion liquid is a corn immersion liquid. The water treatment method according to claim 1,
A water treatment method, wherein the nutrient is a medicinal plant immersion liquid. An aeration tank in which a filtration membrane is installed and treated water is introduced;
The nanobubble-containing water that has been subjected to magnetism is generated and the nanobubble-containing water that has been subjected to magnetism is made to contain a nutrient, and the nanobubble-containing water that contains the nutrient and is magnetized is added to the aeration tank. A magnetically active water nanobubble generation tank to be introduced into
A water treatment apparatus comprising: a nutrient tank for supplying a nutrient to the magnetic active water nanobubble generation tank. The water treatment apparatus according to claim 5,
The water treatment apparatus, wherein the water to be treated is any one of waste water, reused water, lake and river water, and organic fluorine compound-containing water. The water treatment apparatus according to claim 5 or 6,
A water treatment apparatus, wherein a filler is installed in the aeration tank. In the water treatment apparatus according to any one of claims 5 to 7,
The magnetic active water nanobubble generation tank is
A magnetic water heater that causes magnetism to act on the introduced water;
A water treatment apparatus comprising: a nanobubble generator for generating nanobubbles in the introduced water. The water treatment apparatus according to claim 8,
The water treatment apparatus, wherein the nanobubble generator included in the magnetically active water nanobubble generation tank has two or more gas shearing portions. In the water treatment equipment according to any one of claims 5 to 9,
A water treatment apparatus, wherein a corn dipping solution is added as the nutrient to the nutrient tank. In the water treatment equipment according to any one of claims 5 to 10,
A water treatment apparatus comprising: a treated water introduction unit for introducing treated water filtered through the submerged membrane in the aeration tank into the magnetically active water nanobubble generating tank. In the water treatment equipment according to any one of claims 8 to 11,
A submerged membrane pump for extracting filtrate from the submerged membrane,
An operation pressure gauge for detecting the operation pressure of the submerged membrane pump,
A water treatment apparatus comprising: an operation control unit that controls operation of the nanobubble generator included in the magnetically active water nanobubble generation tank based on the operation pressure detected by the operation pressure gauge. In the water treatment equipment according to any one of claims 8 to 12,
An adjustment tank into which treated water is introduced;
A regulating tank pump for introducing the treated water from the regulating tank to the aeration tank;
A submerged membrane pump for extracting filtrate from the submerged membrane,
An operation pressure gauge for detecting the operation pressure of the submerged membrane pump,
A water treatment apparatus comprising: an operation control unit that controls the operation of the adjustment tank pump based on the operation pressure detected by the operation pressure gauge. In the water treatment equipment according to any one of claims 5 to 13,
A submerged membrane pump for extracting filtrate from the submerged membrane,
An outflow capable of a first operation for flowing out the filtrate water derived from the submerged membrane pump as treated water and a second operation for returning the filtrate water derived from the submerged membrane pump to the magnetically active nanobubble generation tank A return section;
An operation pressure gauge for detecting the operation pressure of the submerged membrane pump,
An operation control unit that controls the outflow return unit to perform any one of the first operation and the second operation based on the operation pressure detected by the operation pressure gauge. Water treatment equipment. In the water treatment equipment according to any one of claims 5 to 14,
A contact aeration tank in which the activated carbon is filled in the tank, a rapid filtration tower in which the activated carbon is partially filled in the tower, and an activated carbon adsorption tower are installed in order after the aeration tank. Water treatment equipment. In the water treatment equipment according to any one of claims 7 to 15,
The water treatment apparatus, wherein the filler installed in the aeration tank is a polyvinylidene chloride filler or activated carbon. In the water treatment equipment according to any one of claims 8 to 16,
The water treatment apparatus, wherein the magnetic water heater has a permanent magnet or an AC magnetism generator.

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