JP2006314968A - Frozen and concentrated wastewater treatment apparatus for recovering recirculated water - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a frozen and concentrated wastewater treatment apparatus for efficiently recovering recirculated water which can be used for irrigation water, recycled waste-water or the like from wastewater (non clean water). <P>SOLUTION: An apparatus including a supercooled water producing heat exchanger for supercooling the waste water, suspended matter removal means for removing a suspended matter in the waste water to be supplied to the supercooled water producing heat exchanger, supercooling release means for releasing the supercooling of supercooled wastewater supercooled by the supercooled water producing heat exchanger to generate an ice particle in the wastewater and recirculated water generation means for separating the ice particle from the wastewater containing the ice particle to obtain clean recirculated water from the separated ice particle is used as the frozen and concentrated wastewater treatment apparatus for recovering the recirculated water. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a freeze-concentrated wastewater treatment apparatus that can easily recover reusable water from non-clean water (wastewater) such as daily wastewater, various sewage, underground salt water, and rainwater. In the present invention, the non-clean water to be treated is represented by the term “waste water” to explain the present invention.

  Water is the most important resource for animals and plants, and its importance is no different in any region. However, considering its ease of supply, it is no exaggeration to say that securing water is the most important issue, especially in areas where the amount of available water is extremely small, such as dry areas. In such an area, it is very difficult to secure a particularly large amount of irrigation water, and various attempts have been made to secure it.

  First, water is secured by pumping up groundwater. In this method of pumping up groundwater and using it as irrigation water, it is used for irrigation water, so the amount of water used is large, lowering the level of groundwater, and eventually leading to depletion of groundwater.

  As another method, a centralized sewage treatment plant is provided, and sewage is purified to obtain reused water, and an attempt is made to use this reused water as irrigation water. This method requires a large amount of cost just by constructing a centralized sewage treatment plant, and the operating cost of the reverse osmosis membrane treatment used to purify the sewage is high, so that the capital investment and operating cost can be covered. The enormous amount of money is required. On the other hand, if the sewage treatment is left unattended, various wastewaters will sag, causing water pollution and, consequently, environmental pollution.

  When considering economically securing various types of irrigation water in areas where water resources are scarce and sewage is not widespread as described above, it is not a large-scale centralized sewage treatment facility, but rather distributed, relatively small, reused water production I come up with the need for a device. As an apparatus that can be diverted to such a dispersion-type relatively small reused water production apparatus, a freeze-concentrated wastewater treatment apparatus developed for the purpose of reducing wastewater can be cited (Patent Document 1).

  The freeze-concentrated wastewater treatment device is a device that continuously generates sherbet-like ice (ice particles) using supercooled waste water and mechanically separates the generated ice particles. In this apparatus, as shown in FIG. 10, a stirring blade 1012 is provided in an ice making tank 1011, and waste water H is supplied via a pipe 1013. A supercooling release plate 1014 is disposed on the inner peripheral wall of the ice making tank 1011. The waste liquid H in the ice making tank 1011 is supercooled by the supercooling water production heat exchanger 1015 and then returned to the ice making tank 1011. At this time, the waste liquid H is sprayed toward the supercooling release plate 1014. When the supercooled waste water H collides with the supercooling release plate 1014, ice I is instantaneously generated in a part thereof. The generated sherbet-like ice I and the supercooled waste water H as a liquid are stored in the ice making tank 1011. Therefore, in the ice making tank 1011, waste water H (mixed waste water of waste water supplied from the pipe 1013 and waste water returned after being cooled by the supercooling water production heat exchanger 1015) and ice I are mixed. Thus, the waste water H and ice I are stirred by the stirring blade 1012.

  The ice I in the ice making tank 1011 is supplied to the centrifuge 1016 together with the waste water H, and the waste water H and the ice I are mechanically separated by the centrifuge 1016. Ice I is a clear ice crystal and does not contain impurities. Therefore, by separating the ice I, the amount of water in the waste water H decreases, and the concentration of the waste water H increases accordingly.

  The waste liquid H separated by the centrifugal separator 1016 is supplied to the supercooled water production heat exchanger 1015 again. Since the wastewater H contains impurities, its freezing point is lower than 0 ° C. Therefore, the waste water H is cooled to about −0.5 to −2.0 ° C. by the supercooled water production heat exchanger 1015 and is brought into a supercooled state. The wastewater H thus supercooled collides with the supercooling release plate 1014 to release supercooling, and ice I is generated.

  The ice I separated by the centrifugal separator 1016 is supplied to the ice melting heat exchanger 1017 and is melted into the molten water W in the ice melting heat exchanger 1017. The dirt concentration of the molten water W is below the discharged water quality standard.

  Thus, the conventional freeze-concentrated wastewater treatment apparatus has a function of taking out only moisture from the wastewater H as ice I and discharging the ice I as melt water W. This freeze-concentrated wastewater treatment device is mainly intended to reduce the volume of wastewater that is treated as waste in wastewater treatment, continuously generating ice, and separating and removing the generated ice from wastewater, Concentrate wastewater H to reduce the volume of wastewater used as waste. In this freeze-concentrated wastewater treatment device, the volume of wastewater can be reduced to about 1/10 of the initial input amount, and the wastewater treatment cost can be reduced. In addition, the code | symbol 1018 in a figure shows the waste water circulation supply pipe | tube which supplies the waste water in the said ice making tank 1011 and the waste water isolate | separated by the said separator 1016 to the said supercooled water production heat exchanger 1015.

  By diverting the freeze-concentrated wastewater treatment device to a distributed and relatively small reused water production device, the amount of water available for irrigation water in areas where water resources are small and sewerage is insufficient is reduced. It is expected to be secured without contamination or destruction.

JP 2003-275748 A

  However, when the freeze-concentrated wastewater treatment apparatus is actually used as a reuse water production apparatus, it has been found that there are the following problems that must be solved.

  (1) Wastewater usually contains suspensions such as paper cake, but in the process of generating ice particles when the supercooled wastewater is released from supercooling, Since it plays the role of hindering the generation of ice particles, the amount of ice particles generated is greatly influenced by the content of the suspended matter. In addition, if suspended matter is present in the wastewater, when ice particles are generated by the release of supercooling, the suspended matter is taken into the ice particles, so that it can be reused water obtained by melting the ice particles. Suspended materials will contaminate the water quality. In addition, since suspended matter can become ice nuclei, when untreated water (waste water) containing suspended matter is introduced into the supercooled water production heat exchanger, the phenomenon of supercooling release occurs on the spot, There is a high possibility that the piping will be blocked (freezing).

  (2) Supercooled water is easily frozen by environmental temperature and external physical stimulation. Therefore, ice particles are obtained by making the supercooling water collide with a plate-like member called a supercooling release plate. However, the temperature of the supercooling water varies slightly depending on the composition of the wastewater used as the supercooling water, and the degree of icing varies accordingly. Ideally, the supercooling water colliding with the supercooling release plate flows down from the supercooling plate, and at the same time, forms ice particles and falls into the ice making tank. However, depending on the environmental temperature and fluctuations in the composition of the wastewater, even if the operating conditions are the same, the icing speed when colliding with the supercooling plate is fast and icing may occur on the supercooling plate. When icing starts on the supercooling plate, the icing layer easily grows with time, and if the growth continues, the supercooling water supply pipe located above the supercooling plate may be blocked. When the tip of the supercooling supply pipe freezes, the entire supply pipe is frozen. In that case, it is necessary to stop the operation of the apparatus, peel off the grown ice from the supercooling plate, and release the freezing of the supply pipe. If the attached ice on the cooling release plate is peeled before reaching that point, the device can be stopped for a long time, but the operation of the device must still be stopped during the removal of the attached ice on the cooling release plate. Absent.

  (3) The ice particles generated by releasing the supercooling float in the waste water in the ice making tank, and are then sent to the separator together with the waste water to be separated from the sewage. When the conventional frozen wastewater treatment apparatus is used mainly for obtaining a large amount of reused water, it is necessary to increase the efficiency of separating ice particles from sewage.

  (4) In the conventional freeze-concentrated wastewater treatment apparatus, when harmful microorganisms are present in the wastewater, the microorganisms are not separated during the formation of ice grains but are also taken into the ice grains. That is, the microorganisms in the wastewater cannot be separated and removed in the steps from the generation of ice particles to the generation of reused water, and are included in the reused water as they are. Therefore, when there is a possibility that harmful microorganisms are contained in the wastewater, the obtained reused water cannot be used as it is for middle water or irrigation water.

  As described above, when the conventional freeze-concentrated wastewater treatment device is used as a reused water production device for obtaining a large amount of high-quality reused water, stable generation of ice particles, improvement of the production amount, and production It is necessary to improve the efficiency of separating ice particles from sewage and to improve the sterilization degree of the recycled water produced. Furthermore, in order to obtain a large amount of reused water, continuous operation of the apparatus is essential, so it is important to prevent freezing of the supercooling plate.

  The present invention has been made in view of the above-described conventional circumstances, and is a freezing capable of efficiently recovering high-quality reused water that can be used as a large amount of water such as irrigation water and middle water from wastewater. It is to provide a concentrated wastewater treatment apparatus.

  In order to solve the above-mentioned problems, a freeze-concentrated wastewater treatment apparatus for recovering reused water according to claim [1] of the present invention includes a supercooling water production heat exchanger for supercooling wastewater, and the supercooling water production heat. Suspension removing means for removing suspended matter in the wastewater supplied to the exchanger, supercooling wastewater supercooled by the supercooled water production heat exchanger is desupercooled, and ice is added to the wastewater. It has a supercooling release means for generating grains, and a reuse water generating means for separating ice grains from the waste water containing the ice grains and obtaining clean reuse water from the separated ice grains.

  According to claim [2] of the present invention, the freeze-concentrated wastewater treatment apparatus for recovering reused water is the freeze-concentration wastewater treatment apparatus for recovering reused water according to the above-mentioned claim [1], wherein the suspension removing means is It is a microfiltration membrane separation tank.

  A freeze-concentrated wastewater treatment apparatus for recovering reused water according to claim [3] of the present invention is the freeze-concentration wastewater treatment apparatus for recovering reused water according to claim [2]. Is characterized by the addition of useful microorganisms.

  According to claim [4] of the present invention, the freeze-concentrated wastewater treatment apparatus for recovering reused water is the freeze-concentration wastewater treatment apparatus for recovering reused water according to the above-mentioned claim [1], wherein the suspension removing means is It is a coagulation filtration device.

  A freeze-concentrated wastewater treatment apparatus for recovering reused water according to claim [5] of the present invention is the freeze-concentration wastewater treatment apparatus for recovering reused water according to claim [1], wherein the suspension removing means is It is a pressure levitation device.

  According to claim [6] of the present invention, the freeze-concentrated wastewater treatment apparatus for recovering reused water is the freeze-concentration wastewater treatment apparatus for recovering reused water according to claim [1], wherein the suspended matter removing means It is a foam separation device.

  A freeze-concentrated wastewater treatment apparatus for recovering reused water according to claim [7] of the present invention is a freeze-concentration wastewater treatment apparatus for recovering reused water according to any one of claims [1] to [6]. Further, the present invention is characterized by further comprising a waste water constant temperature means for keeping the temperature of the waste water supplied to the supercooled water production heat exchanger constant.

  The freeze-concentrated wastewater treatment apparatus for recovering reused water according to claim [8] of the present invention is the freeze-concentrated wastewater treatment apparatus for recovering reused water according to the above-mentioned claim [7], wherein the waste water isothermalizing means comprises: It is characterized by having a circulation tank that temporarily stores inflow wastewater from outside and supplies the stored wastewater to the supercooled water production heat exchanger.

  The freeze-concentrated wastewater treatment apparatus for recovering reused water according to claim [9] of the present invention is flowed into the circulation tank in the freeze-concentrated wastewater treatment apparatus for recovering reused water according to claim [8]. An outdoor temperature adjusting pipe is provided for exposing at least a part of the waste water to solar heat and then supplying it to the circulation tank.

  According to claim [10] of the present invention, the freeze-concentrated wastewater treatment apparatus for recovering reused water is the freeze-concentrated wastewater treatment apparatus for recovering reused water according to the above-mentioned claim [8]. A recycled water supply pipe for supplying the obtained reused water to the outside of the apparatus is attached, a solar irradiation unit is provided in a part of the supply pipe, and a pipe downstream from the solar irradiation unit is at least partially In particular, it passes through the circulation tank.

  A freeze-concentrated wastewater treatment apparatus for collecting reused water according to claim [11] of the present invention is a freeze-concentrated wastewater treatment apparatus for collecting reused water according to any one of the above-mentioned claims [1] to [10]. The reclaimed water generating means is provided below the supercooling release means and an ice making tank into which waste water from a waste water source is injected, and a washing means for washing the ice particles discharged from the ice making tank, It is characterized by comprising a separator for separating the washing water discharged from the washing means and the ice particles.

  According to claim [12] of the present invention, the freeze-concentrated wastewater treatment apparatus for recovering reused water is the freeze-concentrated wastewater treatment apparatus for recovering reused water according to the above-mentioned claim [11], wherein the cleaning means supplies clean water. It is characterized by being a filled washing tank.

  The recycle water recovery freeze concentration wastewater treatment apparatus according to claim [13] of the present invention is the recycle water recovery freeze concentration wastewater treatment apparatus according to claim [11], wherein the cleaning means is a hot air apparatus. It is characterized by being.

  According to claim [14] of the present invention, the freeze-concentrated wastewater treatment apparatus for recovering reused water is the freeze-concentration wastewater treatment apparatus for recovering reused water according to the above-mentioned claim [11], wherein the cleaning means supplies clean water. It is a shower device for spraying.

  A freeze-concentrated wastewater treatment apparatus for collecting reused water according to claim [15] of the present invention is a freeze-concentrated wastewater treatment apparatus for collecting reused water according to any one of the above-mentioned claims [1] to [10]. In the above, the reuse water generating means includes a rotating shaft to which the supercooling release plate is fixed at a tip thereof, and an inverted conical solid-liquid separation wall fixed to the rotating shaft so as to surround the rotating shaft. It is characterized by being a centrifuge which has.

  A freeze-concentrated wastewater treatment apparatus for collecting reused water according to claim [16] of the present invention is a freeze-concentrated wastewater treatment apparatus for collecting reused water according to any one of claims [1] to [15]. In the above, a reuse water supply pipe for supplying the reuse water generated in the reuse water generating means to the outside of the apparatus is attached, and the supply pipe is provided with a solar heat sterilization structure.

  The freeze-concentrated wastewater treatment apparatus for recovering reused water according to the present invention is capable of efficiently recovering reused water having good water quality that can be used as irrigation water or middle water from sewage composed of domestic wastewater or the like. Play.

  Below, the Example of the freeze concentration waste water processing apparatus for the reuse water collection | recovery concerning this invention is described in detail based on drawing. In addition, the Example shown below is only the illustration for demonstrating this invention suitably, and does not limit this invention at all.

  FIG. 1 shows a schematic configuration of a freeze-concentrated wastewater treatment apparatus for recovering reused water according to the present invention. The same components as those shown in FIG.

  As shown in FIG. 1, the freeze-concentrated wastewater treatment apparatus for recovering reused water according to the present invention is supplied to a supercooling water production heat exchanger 1015 for supercooling wastewater and the supercooling water production heat exchanger 1015. Suspension removing means 1 for removing suspended matter in the wastewater and supercooling wastewater supercooled by the supercooled water production heat exchanger 1015 are desupercooled to generate ice particles in the wastewater. And a recycle water generation unit 4 for separating ice particles from the waste water containing the ice particles and obtaining clean reuse water from the separated ice particles. In contrast to the basic configuration of the present invention, the present embodiment further includes waste water thermostatic means 2 for keeping the temperature of waste water supplied to the supercooled water production heat exchanger 1015 constant. In the present invention, the supercooling release means 3 may be a conventional supercooling release plate formed in a plate shape, a block having a plane on which supercooled wastewater collides, or other shapes. It doesn't matter. In short, the shape and material are not limited as long as the supercooling can be released. Further, a concentrated waste water extraction pipe 1011 a is provided at the bottom of the ice making tank 1011.

  In the freeze-concentrated wastewater treatment apparatus having the above-described configuration, first, the wastewater is removed from the suspended matter by the suspended matter removing means 1 before being supplied to the ice making tank 1011. The waste water from which the suspended matters have been removed is temporarily stored in the ice making tank 1011 and supplied to the supercooled water production heat exchanger 1015 via the waste water isothermal means 2. The waste water isothermal means 2 serves to maintain the temperature of the waste water supplied to the supercooled water production heat exchanger 1015 in a substantially constant temperature range (a temperature range in which no ice nuclei remain in the waste water) throughout the year. is there. The waste water isothermal means 2 can supply waste water in a temperature range in which ice nuclei cannot exist to the supercooled water production heat exchanger 1015, and by maintaining the supplied waste water temperature constant, It is possible to avoid an abnormal situation where icing starts immediately after being cooled by the production heat exchanger 1015. Further, the supercooled water production heat exchanger 1015 not only reduces the load, but also improves the efficiency of ice particles. Subcooling can be performed on the wastewater, which is suitable for inducing the formation. Regarding this point, that is, the effect of keeping the waste water temperature constant in the waste water thermostatic means 2 will be further described in the following two points.

  First, the temperature at which ice nuclei in the wastewater can be melted [approx. 0.5 ° C: Conversely, if the temperature is set high, the wastewater is heated to a predetermined temperature (supercooled state) in the supercooled water production heat exchanger The cooling energy required to reduce the pressure to the maximum (the load on the supercooled water production heat exchanger increases and the running cost increases) can be maintained to prevent clogging (freezing) in the piping. .

  Second, it is possible to easily control the supercooling temperature. By keeping the temperature of the wastewater flowing into the supercooling water production heat exchanger constant, the load on the supercooling water production heat exchanger becomes constant, and the temperature of the supercooling water cooled by the supercooling water production heat exchanger Can be kept constant. The supercooling temperature needs to be controlled with an accuracy of about ± 0.2 ° C. with respect to the set value. This is because when the supercooling temperature is high, the amount of ice produced is reduced, and the amount of recovered water is reduced. Conversely, when the supercooling temperature is low, the supercooling is released in the heat exchanger, and the piping is This is because the possibility of causing occlusion becomes extremely large.

  The supercooled wastewater supercooled in the supercooled water production heat exchanger 1015 is jetted toward the supercooling release means 3, and the supercooling is released by colliding with the supercooling release means 3. Arise. Since the suspension in the wastewater is removed by the suspension removing means 1, since the suspension is not included in the supercooled wastewater, a larger amount of ice particles is generated compared to the conventional case. be able to. In addition, since the suspended ice is not taken into the generated ice particles and there is no suspended solids in the wastewater stored in the ice making tank 1011, it is obtained by melting ice particles in the subsequent process. Suspended materials are not entrained in the reused water. Therefore, according to the freeze concentration wastewater treatment apparatus of the present invention, it is possible to reliably prevent the reused water from being contaminated by the suspended solids.

  The ice particles are efficiently separated from the waste water by the reuse water generation means 4, melted by the ice melting heat exchanger 1017, and recovered as reuse water.

  As described above, the waste water in the ice making tank 1011 is supercooled and then released from supercooling to generate ice particles. The ice particles are collected as reused water. Concentrate gradually. If the concentration becomes excessive, it becomes difficult to obtain clean ice particles. Therefore, as shown in FIG. 1, a concentrated waste water extraction pipe 1011a is installed at the bottom of the ice making tank 1011, and the concentrated waste water is withdrawn as needed. It is desirable to prevent it from being concentrated.

  The basic configuration and the operation of the freeze-concentration wastewater treatment apparatus according to the present invention have been described above. In the following examples, details of each component of the freeze-concentration wastewater treatment apparatus of the present invention having such a configuration will be sequentially described. explain.

  The present Example 2 demonstrates the case where the microfiltration membrane separation tank 11 shown in FIG. 2 is used as an example of the specific structure of the suspension removal means 1 in the said structure.

  As shown in FIG. 2, the microfiltration membrane separation tank 11 is an apparatus having a configuration in which a microfiltration membrane cartridge 13 is installed in a chamber 12 into which waste water is introduced. The filtration membrane cartridge 13 includes a cartridge body 14 and a microfiltration membrane 15 fixed to the side surface of the body 14. A large number of flow paths are formed in the cartridge main body 14 so as to open to the side surface and the upper part, and the water that has permeated the microfiltration membrane 15 is led out from the upper opening through the internal flow path. ing. That is, the suspended matter in the waste water in the chamber 12 is filtered by the microfiltration membrane 15, and the water from which the suspended matter has been removed by filtration is taken into the cartridge body 14, and the separated suspended matter is stored in the chamber. 12 is left in the wastewater. Since the flocculant is not required to remove the suspended matter, the amount of secondary waste deposited as scum in the chamber 12 can be reduced. The waste water from which the suspended substances are separated in this way is led out from the upper opening and is poured into the ice making tank 1011 shown in FIG. At the bottom of the chamber 12, an air diffuser 16 for generating compressed air from the blower as bubbles is provided. The suspended matter adhering to the surface of the microfiltration membrane 15 is peeled off by a large number of bubbles generated from the air diffuser 16 so as to prevent a decrease in filtration performance.

  The microfiltration membrane 15 is a membrane filter, and a mesh size of 0.4 μm can be suitably used. This is because the suspended matter removal means 1 can be fulfilled if the suspended matter having a diameter exceeding 1 μm can be removed. Water-insoluble components having a size of 1 μm or less do not become ice nuclei when ice is formed, and water-insoluble components having a diameter exceeding 1 μm can become ice nuclei of ice grains formed when the supercooling is released. Therefore, if the suspended matter having a diameter exceeding 1 μm is not removed, the water collected as ice particles may be contaminated by the suspended matter. In this embodiment, since the microfiltration membrane having a mesh size of 0.4 μm is used as described above, the suspended matter is not taken into the ice particles generated by the release of the supercooling. In addition, since the waste water from which the suspended matter has been removed by the microfiltration membrane separation tank 11 is poured into the ice making tank 1011, the waste water in the ice making tank 1011 is not mixed with the suspended matter, and is not contained in the ice grain tank 1011. The suspended particles will not adhere to the surface of the falling ice particles and contaminate the ice particles.

  As a modification of the present embodiment, a configuration in which useful microorganisms are added to the microfiltration membrane separation tank 11 is possible. As a method for adding useful microorganisms, for example, a method of adding activated sludge to the tank can be mentioned. As is well known, activated sludge is a collection of useful microorganisms such as useful bacteria, molds, algae, protozoa, rotifers, nematodes, etc., and each microorganism is a pollutant through their metabolic activity. Transforms into a substance that is harmless to living things. That is, activated sludge (useful microorganism aggregates) is added to the microfiltration membrane separation tank 11 and kept in an aerobic atmosphere (a state where oxygen is present) (for example, aerated), thereby decomposing pollutants in the wastewater. Is done.

  In this way, if the microfiltration membrane separation tank 11 is operated in a state where useful microorganisms are added, in addition to the removal of suspended matter in the microfiltration membrane 15, the organic substance is decomposed simultaneously with the metabolic activity of the useful microorganisms. As a result, the degree of purification of sewage can be further increased. As a result, the waste water in the ice making tank 1011 is further purified, and the contamination of ice particles that are temporarily mixed with the waste water is also reduced. Therefore, it is possible to reduce the load of the subsequent ice particle cleaning process.

  In the third embodiment, as another example of the specific configuration of the suspended matter removing means 1, a case where a coagulation filtration device 21 shown in FIG. 3 is used will be described.

  As shown in FIG. 3, this agglomeration filtration device 21 contains a reaction tank 22 for reacting a wastewater with a flocculant and a coagulant aid as required, and stores waste liquid reacted with the flocculant in the waste liquid. The agglomeration tank 23 for agglomerating the suspended matter and the filtration tank 24 for filtering the agglomerated components are sequentially connected. The reaction tank 22 and the coagulation tank 23 are adjacent to each other, and waste water in the coagulation tank 23 is pumped out by a pump 25 and poured into a filtration tank 24. As shown in the figure, the filtration tank 24 has a filtration layer 26 in the middle part, and waste water is introduced from the lower part and passes through the middle filtration layer 26 to filter the floating agglomerated components, and from the upper part. It is taken out as waste water containing no suspended matter and poured into the ice making tank 1011. An air diffuser for generating compressed air from the blower as bubbles is provided at the bottom of the filtration tank 24. The floating coagulation component adhering to the filtration layer 26 is peeled off by a large number of bubbles generated from the air diffuser, thereby preventing the filtration performance from deteriorating. As described above, since the filtration layer 26 is maintained by foam washing without using a chemical for washing the filtration layer 26, the treatment of the chemical waste liquid is unnecessary, which is excellent in terms of economy and environmental protection.

  The coagulation filtration device 21 cannot perform filtration as fine as the microfiltration membrane, but can remove suspended matters having a size exceeding 1 μm. In addition, since filtration is performed using a flocculant, not only the suspended matter but also semi-dissolved impurities can be aggregated and removed, so that it can be said that the purification property of wastewater is high. Therefore, by using the coagulation filtration device 21 of this embodiment as the suspended matter removing means 1, suspended matter is not taken into the ice particles produced by the release of supercooling. In addition, since the waste water from which the suspended matter has been removed by the agglomeration filtration device 21 is poured into the ice making tank 1011, the waste water in the ice making tank 1011 is not mixed with the suspended matter and falls into the ice grain tank 1011. The suspended particles do not adhere to the surface of the incoming ice particles and contaminate the ice particles.

  In the fourth embodiment, as another example of the specific configuration of the suspended matter removing means 1, a case where a pressure levitation device 31 shown in FIG. 4 is used will be described.

  As shown in FIG. 4, the pressure levitation device 31 includes a reaction tank 32 in which a flocculant is mixed and reacted with waste water, and agglomeration in which waste liquid that has reacted with the flocculant is stored to aggregate the suspended matter in the waste liquid. It is an apparatus having a configuration in which a tank 33 and a floating separation tank 34 for removing the agglomerated components using fine bubbles are sequentially connected. The reaction tank 32 and the agglomeration tank 33 are adjacent to each other, and waste water in the agglomeration tank 33 is pumped out by a pipe 35 into which pressurized water is merged, and is poured into a floating separation tank 34. The reaction tank 32 and the agglomeration tank 33 are each provided with a stirring means. As shown in the drawing, the levitation separation tank 34 causes the flocculated component in the wastewater sent from the flocculation tank 33 to adhere to the fine bubbles 34a contained in the pressurized water to forcibly float, thereby Is a device configured to remove suspended components that have floated as above by the sweeping means 34b provided at the top. In addition, since a part of treated water is used for the said pressurized water, an extra water source is unnecessary.

  The levitation separator 31 cannot filter as finely as the microfiltration membrane, but can sufficiently remove suspended matters having a size exceeding 1 μm. In addition, since filtration is performed using a flocculant, not only the suspended matter but also semi-dissolved impurities can be aggregated and removed, so that it can be said that the purification property of wastewater is high. In addition, the separation after agglomerating the suspended matter has a configuration in which the apparatus can be reduced in size because it is forcibly lifted and removed by extremely fine bubbles generated by injection of pressurized water. When the bubbles reach the surface of the waste water, it is desirable that the bubbles are not immediately removed. Therefore, in such a separation apparatus using bubbles, the addition of a foaming agent has become a conventional means. However, since most of the wastewater contains a detergent component, the contained detergent component can serve as a foaming agent, and in some cases, only a small amount of foaming agent is added. Even if it is not added, forced flocculation of agglomerated components can be realized.

  By using the pressurized levitation device 31 of the present embodiment as the suspended matter removing means 1, suspended matter is not taken into the ice particles generated by the release of supercooling. Further, since the waste water from which the suspended matter has been removed by the pressurized levitation device 31 is poured into the ice making tank 1011, the waste water in the ice making tank 1011 is not mixed with the suspended matter and falls into the ice grain tank 1011. The suspended particles do not adhere to the surface of the incoming ice particles and contaminate the ice particles.

  In the fifth embodiment, a case where a foam separation device 41 shown in FIG. 5 is used as another example of the specific configuration of the suspension removing means 1 will be described.

  As shown in FIG. 5, the foam separation device 41 includes a reaction tank 42 in which a flocculant is mixed and reacted with waste water, and a coagulation tank in which the waste liquid reacted with the flocculant is stored and the suspension in the waste liquid is agglomerated. 43 and a gas-liquid contact tower 44 for removing the agglomerated component using fine bubbles are sequentially connected. The reaction tank 42 and the coagulation tank 43 are adjacent to each other, and the waste water in the coagulation tank 43 is led out by the pipe 45 and poured into the gas-liquid contact tower 44. The reaction tank 42 and the agglomeration tank 43 are each provided with stirring means. As shown in the figure, the gas-liquid contact tower 44 causes the flocculated components in the waste water sent from the flocculation tank 43 to adhere to the fine bubbles 44b formed by the filter 44a at the bottom and forcibly float up. It is an apparatus configured to remove suspended components floating as scum from the top. Air is blown into the filter 44 from an air supply pump 46 outside the tower. This air is refined by the filter 44a to form fine bubbles and float in the waste water in the tower. The fine bubbles are not as fine as the bubbles in the pressurized levitation apparatus 31 shown in the fourth embodiment, but can agglomerate components having a diameter of 1 μm or more to float and be separated. When the bubbles reach the surface of the waste water, it is desirable that the bubbles are not immediately removed. Therefore, in such a separation apparatus using bubbles, the addition of a foaming agent has become a conventional means. However, since most wastewater contains detergent components, these contained detergent components can serve as a foaming agent, and a small amount of foaming agent can be added, or in some cases, completely added. Even without this, the forced levitation of the agglomerated components can be realized.

  The foam separation device 41 cannot perform filtration as fine as the microfiltration membrane, but can sufficiently remove suspended matters having a size exceeding 1 μm. In addition, since filtration is performed using a flocculant, not only the suspended matter but also semi-dissolved impurities can be aggregated and removed, so that it can be said that the purification property of wastewater is high. Further, the separation after agglomeration of the suspended matter is a configuration in which the air bubbles are forcibly lifted and removed by fine bubbles, so that the apparatus can be miniaturized.

  By using the foam separation device 41 of the present embodiment as the suspended matter removing means 1, suspended matter is not taken into the ice particles generated by the release of supercooling. Further, since the waste water from which the suspended matter has been removed by the foam separation device 41 is poured into the ice making tank 1011, the waste water in the ice making tank 1011 is not mixed with the suspended matter and falls into the ice grain tank 1011. The suspended particles do not adhere to the surface of the incoming ice particles and contaminate the ice particles.

  In the sixth embodiment, as an example of a specific configuration of the waste water thermostatic means 2, a case where a configuration in which a new circulation tank 51 and an outdoor temperature adjustment pipe 52 shown in FIG. 6 are combined is used will be described. .

  A part of the waste water from which the suspended matter has been removed by the suspended matter removing means 1 is stored in the circulation tank 51. The waste water pipe that has passed through the suspension removal means 1 is branched, one of which opens to the circulation tank 51 as described above, and the other branch pipe, that is, the outdoor temperature adjustment pipe 52 extends to the outside. After the temperature is adjusted by the outside air temperature, the circulation tank 51 is opened. The outdoor temperature adjustment pipe 52 is exposed so as to meander outdoors, so that the temperature is raised by the action of outside air temperature and sunlight, and a flow rate controller is used to keep the waste water temperature in the circulation tank 51 constant. An appropriate flow rate is supplied to the circulation tank 51 by 53. The adjustment in the flow rate controller 53 is performed based on the waste water temperature in the circulation tank 51 measured by the temperature sensor 54 installed in the circulation tank 51.

  In the above-described configuration, the ice making tank 1011 stores the ice particles and the cooling waste water generated by releasing the supercooling wastewater, so that the temperature in the tank is kept low and the melting of the ice particles is promoted. There is no risk of ice volume reduction. That is, if waste water having a high temperature is directly supplied to the ice making tank, the generated ice is melted, and the amount of recovered ice is reduced. On the other hand, as described above, by providing a circulation tank and supplying waste water thereto, loss (melting) of generated ice in the ice making tank can be prevented.

  Cooling wastewater flows into the circulation pump 51 from the ice grain tank 1011. However, since the temperature of wastewater supplied from outside is high in summer, the wastewater in the tank is adjusted to an appropriate temperature simply by stirring the circulation tank 51. As a result, the ice nuclei present in the cooling wastewater are melted. However, in the winter season, etc., the waste water from the outside is at a low temperature, and the waste water mixed with these remains at a considerably low temperature, so that ice nuclei generated in the waste water in the ice making tank 1011 continue to exist as they are. It will be. When such cooling wastewater is directly sent to the supercooling water production heat exchanger 1015 and is supercooled, ice particles are easily generated. As a result, there arises a problem that the waste water is iced in the pipe heading to the supercooling release means 4 or that the ice particles adhere to the supercooling release means 4 and are difficult to peel off. The situation so far is the same as that occurring in the conventional ice making tank 1011 without the circulation tank 51. In the conventional case, when the supply wastewater temperature decreases in winter, it is difficult to prevent ice nuclei from being mixed into the wastewater supplied to the supercooled water production heat exchanger 1015. In contrast, in this embodiment, the circulation tank 51 is provided, and at least a part of the waste water supplied to the circulation tank 51 is passed through the outdoor temperature adjustment pipe 52 to raise the temperature, and the amount of waste water that has been raised in temperature is increased. It supplies to the circulation tank 51, controlling. Therefore, in winter, most of the supplied wastewater is diverted to the outdoor temperature adjustment pipe 52 and then flows into the circulation tank 51, so that the temperature of the wastewater in the circulation tank 51 is not significantly different from the temperature of the wastewater in other seasons. It is possible to keep the range, i.e. the temperature range sufficient to melt the ice nuclei.

  In the seventh embodiment, as another example of the specific configuration of the waste water isothermal unit 2, a circulation tank 51 shown in FIG. 7 and a reused water supply pipe 62 having a sunlight irradiated portion 61 in a part thereof are provided. The case where the structure which combined these is used is demonstrated.

  Similarly to the sixth embodiment, waste water from which the suspended matter has been removed by the suspended matter removing means may flow into the circulation tank 51. Similarly, after flowing into the ice making tank 1011, waste water may be supplied from the ice making tank 1011, or waste water may be supplied simultaneously from both.

  The reused water obtained by melting the ice particles by the ice melting heat exchanger 1017 is supplied to the outside through the reused water supply pipe 61. The reuse supply pipe 62 is exposed to the outdoors, and a sunlight irradiated portion 61 is provided in a part thereof, and the temperature of the used water can be increased in this part. As the structure of the sunlight irradiated portion 61, a structure commonly used as a solar water heater can be used. If the pipe has a double-pipe structure, it is possible to secure heat insulation and suppress the dissipation of absorbed heat. As this sunlight irradiated part 61, the structure which makes a pipe meander and coat | covers with the black coating can be simply performed.

  A bypass pipe 62 a is provided downstream of the use water supply pipe 62. The bypass pipe 62 a branches from the use water supply pipe 62, then bypasses the circulation tank 51, and then returns to the use water supply pipe 62. It is configured to merge. Therefore, the bypass pipe 62a gives the heat energy obtained by the sunlight irradiated portion 61 to the waste water in the circulation tank 51.

  The amount of heat energy supplied to the wastewater in the circulation tank 51 by the bypass pipe 62 a is controlled by a flow rate adjuster 63 that is linked to the temperature sensor 54.

  Even when the waste water thermostatic means 2 according to the present invention is realized by the combination of the circulation tank 51 and the recycled water supply pipe 62 having the sunlight irradiated part 61 in a part thereof as described above. The same temperature adjustment effect (in other words, ice nucleation effect) can be obtained as in the case where the outdoor temperature adjustment pipe 52 of the supply wastewater described in the sixth embodiment is used.

  As a modification of the seventh embodiment, the sunlight irradiated portion 61 can be made of a material that is excellent in ultraviolet transparency. By constructing the sunlight irradiated portion 61 from a material having excellent ultraviolet transmittance, the reused water passing through the supply pipe 62 can be sterilized in the sunlight irradiated portion 61. If the wastewater contains harmful bacteria, the bacteria will not be killed even in a supercooled state, and will remain contained in the generated ice particles. Will remain contaminated. Therefore, it is very significant to sterilize the reused water obtained by the apparatus of the present invention before supplying it to the outside of the apparatus for use as middle water or irrigation water. As a sterilization structure for that purpose, the sunlight irradiated portion 61 made of a material excellent in ultraviolet transmittance can be easily and inexpensively manufactured and is useful.

  In the present embodiment, another example of the specific configuration of the waste water thermostatic means 2 is shown. This specific configuration is for dealing with a case where the device of the present invention is used in an area where the temperature is high.

  In the apparatus of the present embodiment, first, as shown in FIG. 8, the waste water that has passed through the suspension removal means 1 is caused to flow into the circulation tank 51. A waste water cooling heat exchanger 75 is attached to the waste water inflow pipe 1013, and a reuse water supply pipe 76 for flowing reuse water obtained from the ice melting heat exchanger 1017 passes through the heat exchanger 75. It has become. As a result, the waste water in the pipe 1013 exchanges heat with reused water, and the temperature is lowered. A flow rate controller 77 is attached to the reuse water supply pipe 76, and a control signal is input to the flow rate controller 77 from a temperature sensor 54 that detects the waste water temperature in the circulation tank 51. ing. In the present embodiment, the circulation tank 51, the temperature sensor 54, the waste water cooling heat exchanger 75, the reuse water supply pipe 76, and the flow rate controller 77 constitute the waste water constant temperature means 2.

  When using freeze-concentrated wastewater treatment equipment to obtain reused water in high-temperature areas, the temperature of the influent wastewater is too high, and the temperature of the wastewater in the circulation tank 51 is kept at an appropriate temperature (about 0.5 ° C). I can't keep it. When the temperature of the waste water in the circulation tank 51 rises, the load (energy required for cooling) applied to the supercooled water production heat exchanger 1015 increases, and the water production cost increases.

  The problem when installing in such a high temperature area is that the configuration of the waste water temperature isolating means of the apparatus of this embodiment, that is, a part of the reused water (ice melting water) is bypassed to exchange heat with the inflow waste water. This can be solved by lowering the influent wastewater temperature.

  As described above, according to the present embodiment, it is possible to lower the inflow wastewater temperature by exchanging heat between the inflow wastewater and the reused water, and to prevent the temperature of the wastewater in the circulation tank 51 from rising. Thereby, the load (energy required for cooling) applied to the supercooled water production heat exchanger 1015 can be reduced, and the waste water temperature in the circulation tank 51 can be kept constant at a predetermined temperature (about 0.5 ° C.). Control of the supercooling water temperature becomes easy.

  The reuse water generating means 4 which is a component in the present invention may be a combined configuration of an ice making tank 1011 and a centrifuge 1016 provided in a conventional apparatus, but more preferably the combination shown in this embodiment. A centrifuge having a double wall structure as shown in Example 10 is used.

  The reuse water generating means 4 shown in this embodiment is commonly used in the apparatus shown in FIGS. 1 and 7, and is provided in the lower part of the supercooling release means and ice making from which waste water from a waste water source is injected. The tank 1011 includes a cleaning unit 71 that cleans the ice particles discharged from the ice making tank 1011, and a separator 1016 that separates the cleaning water discharged from the cleaning unit 71 from the ice particles.

  As the cleaning means 71, a cleaning tank (not shown) filled with clean water, a warm air device (not shown), or a shower device (not shown) for spraying clean water can be used.

  When the washing means 71 is a washing tank filled with clean water, the sewage is washed away from the surface of the ice particles by the clean water in the tank by transferring the ice particles from the ice making tank 1011 to the washing tank. Further, when the cleaning means 71 is a hot air device, the ice particles are melted by the hot air by transferring the ice particles from the ice making tank 1011 to the hot air device, and sewage is generated from the ice particles by the molten water. Washed away. In this case, the volume of ice particles is reduced even in a small amount. In the case where the cleaning means 71 is a shower device that sprays clean water, by transferring ice particles from the ice making tank 1011 to the shower device, dirty water is washed away from the surface of the ice particles by the sprayed clean water.

  By applying the ice particles washed by the cleaning means 71 to the centrifugal separator 1016, the waste water is reliably removed from the surface of the ice particles, and clean ice particles are obtained. Ice particles from which the waste water has been reliably removed can be melted by the ice melting heat exchanger 1017 to obtain clean recycled water.

  In this embodiment, another example of the reused water generating means 4 which is a component in the present invention is shown. As shown in FIG. 9, another example of the reused water generating means 4 includes a rotary shaft 81 to which the supercooling release means 3 is fixed at the tip thereof, and the rotary shaft 81 surrounds the rotary shaft 81. And a solid-liquid separation wall 82 having an inverted conical shape fixed to the centrifugal separator.

  The solid-liquid separation wall 82 is an inverted conical member whose diameter is increased upward, and is fixed to the rotating shaft 81, and rotates at a high speed when the rotating shaft 81 is driven. The solid-liquid separation wall 82 includes an outer wall portion 82a that faces the supercooling water supply pipe 83 that guides supercooling water from the supercooling water production heat exchanger 1015, and an inner wall portion 82b that is opposite to the outer wall portion 82a. It has a heavy wall structure. The outer wall portion 82a has a liquid-tight structure, and the inner wall portion 82b has a mesh structure. The inner bottom portion 84a of the support body 84 that supports the rotating shaft 81 is inclined, and a liquid path 85 is formed at the lowermost part of the inclination. The liquid path 85 is guided to the waste water isothermal means 2. Further, the outer periphery of the support 84 rises as a double wall structure, and an ice particle transport path 86 is formed inside. The upper edge of the ice particle conveyance path 86 is close to the upper opening edge of the inverted conical solid-liquid separation wall 82. The ice particle conveyance path 86 is guided to the ice melting heat exchanger 1017.

  The supercooled waste water sprayed downward from the supercooling supply pipe 83 collides with the supercooling release means 3 fixed to the tip of the rotating shaft 81 to generate ice particles. The generated ice particles are taken into the solid-liquid separation wall 82 together with the remaining waste water by the centrifugal force accompanying the high-speed rotation of the rotating shaft 81, and the waste water is shaken off from the ice particles through the inner wall portion 82b of the mesh structure. . The waste water shaken off is guided to the inclined inner bottom portion 84a of the support 84 and enters the liquid path 85, and is sent from the liquid path 85 to the waste water constant temperature means 2.

  On the other hand, the ice particles are moved up along the inner wall 82 b of the mesh structure while being separated from the waste water by centrifugal force, reach the upper end edge of the solid-liquid separation wall 82, and then fall into the ice particle conveyance path 86. The ice particles falling on the ice particle conveyance path 86 are sent to the ice melting heat exchanger 1017 via the ice particle conveyance path 86 and melted to become reused water.

  In the present embodiment, as the reuse water generation means 4, one unit of a double wall structure in which the supercooling release means 3 is incorporated inside instead of the combined structure consisting of the ice making tank 1011, the cleaning means 71 and the centrifuge 1016. Therefore, a remarkable effect can be obtained that the installation area and the installation cost of the entire freeze-concentrated wastewater treatment apparatus according to the present invention can be reduced. In addition, it is also possible to provide a clean water shower means inside the double-wall structure centrifugal separator, and the ice particle cleaning effect can be enhanced by installing the shower means.

  In the freeze-concentrated wastewater treatment apparatus of the present invention, in order to efficiently obtain a large amount of clean reused water, the suspended matter removal means is an essential component, and the wastewater isothermal means or specific reuse Although it is said that the effect can be further improved by combining the water generating means, even when these three elements are each installed in a conventional freeze-concentrated wastewater treatment apparatus, compared with the conventional apparatus, It can be expected that clean reuse water can be obtained, reuse water can be obtained more efficiently, or these effects can be obtained simultaneously.

  As described above, the freeze-concentrated wastewater treatment apparatus according to the present invention can efficiently and economically recover water with good water quality from wastewater without constructing a large-scale facility. It can be used as a small-to-medium-scale wastewater purification device in areas where there is a shortage of intermediate water or where sewage is not complete, and there are problems with sewage treatment and water used in large quantities such as irrigation water and intermediate water. Can be solved at the same time, contributing to environmental conservation and environmental improvement.

1 shows a first embodiment of a freeze-concentrated wastewater treatment apparatus according to the present invention, and is a schematic configuration diagram of the apparatus. FIG. Example 2 of the freeze concentration wastewater treatment apparatus concerning this invention is shown, and it is a schematic block diagram of the microfiltration membrane separation tank which is the principal part of an apparatus. Example 3 of the freeze concentration wastewater treatment apparatus according to the present invention is a schematic configuration diagram of a coagulation filtration apparatus which is a main part of the apparatus. Example 4 of the freeze concentration wastewater treatment apparatus concerning this invention is shown, and it is a schematic block diagram of the pressurization flotation apparatus which is the principal part of an apparatus. Example 5 of the freeze concentration waste water treatment apparatus concerning this invention is shown, and it is a schematic block diagram of the foam separation apparatus which is the principal part of an apparatus. Example 6 of the freeze concentration waste water treatment apparatus concerning this invention is shown, and it is a schematic block diagram which shows an example of the waste water constant temperature means which is the principal part of an apparatus. Example 7 of the freeze concentration wastewater treatment apparatus according to the present invention is a schematic configuration diagram showing another example of the wastewater constant temperature means which is a main part of the apparatus. Example 8 of the freeze concentration wastewater treatment apparatus according to the present invention is a schematic configuration diagram showing still another example of the wastewater constant temperature means which is a main part of the apparatus. 9 shows a ninth embodiment of a freeze-concentrated wastewater treatment apparatus according to the present invention, and is a schematic configuration diagram showing an example of a reuse water generating unit that is a main part of the apparatus. FIG. It is a schematic block diagram of the conventional freeze concentration wastewater processing apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Suspension removal means 2 Waste water constant temperature means 3 Supercooling cancellation means 4 Recycled water production | generation means 11 Microfiltration membrane separation tank 12 Wastewater chamber 13 Microfiltration membrane cartridge 14 Cartridge main body 15 Microfiltration membrane 16 Aeration means 21 Aggregation filtration Equipment 22 Reaction tank 23 Coagulation tank 24 Filtration tank 25 Pump 26 Filtration layer 31 Coagulation filtration apparatus 32 Reaction tank 33 Coagulation tank 34 Floating separation tank 35 Piping line for joining pressurized water 34a Fine bubbles 34b Sweep means 41 Foam separation apparatus 42 Reaction Tank 43 Coagulation tank 44 Gas-liquid contact tower 45 Piping 44a Filter 44b Fine bubbles 46 Air supply pump 51 Circulating tank 52 Outdoor temperature adjusting pipe 53 Flow rate controller 54 Temperature sensor 61 Solar irradiated part 62, 76 Reused water supply pipe 62a Bypass pipe 63, 77 Flow controller 71 Cleaning means 75 Waste water Rejection heat exchanger 81 Rotating shaft 82 Inverted conical solid-liquid separation wall 83 Supercooling water supply pipe 82a Outer wall portion 82b Inner wall portion 84 Support body supporting the rotating shaft 84a Inner bottom portion 85 Liquid passage 86 Ice grain conveyance passage 1011 Ice making Tank 1011a Concentrated waste water extraction pipe 1012 Agitating blade 1013 Pipe 1014 Supercooling release plate 1015 Supercooling water production heat exchanger 1016 Centrifugal separator 1017 Ice melting heat exchanger

Claims (16)

A supercooled water production heat exchanger that supercools wastewater;
Suspension removal means for removing suspension in wastewater supplied to the supercooled water production heat exchanger;
Supercooling release means for performing supercooling release of supercooled wastewater subcooled by the supercooled water production heat exchanger, and generating ice particles in the wastewater,
Recycled water generating means for separating ice particles from waste water containing ice particles and obtaining clean recycled water from the separated ice particles;
A freeze-concentrated wastewater treatment apparatus for collecting recycled water.   The freeze-concentrated wastewater treatment apparatus for collecting reused water according to claim 1, wherein the suspension removing means is a microfiltration membrane separation tank.   The freeze-concentrated wastewater treatment apparatus for collecting reused water according to claim 2, wherein useful microorganisms are added to the microfiltration membrane separation tank.   The freeze-concentrated wastewater treatment apparatus for collecting reused water according to claim 1, wherein the suspension removing means is a coagulation filtration apparatus.   The freeze-concentrated wastewater treatment apparatus for collecting reused water according to claim 1, wherein the suspension removing means is a pressurized flotation device.   The freeze-concentrated wastewater treatment apparatus for reused water recovery according to claim 1, wherein the suspension removing means is a foam separation device.   Furthermore, it has a waste water constant temperature means to keep the temperature of the waste water supplied to the said supercooled water production heat exchanger constant, For reused water collection | recovery of any one of Claims 1-6 characterized by the above-mentioned. Freezing and condensing wastewater treatment equipment.   8. The waste water isothermal unit has a circulation tank that temporarily stores inflow waste water from outside under agitation and supplies the stored waste water to the supercooled water production heat exchanger. The freeze-concentrated wastewater treatment apparatus for recycling water described.   9. The recycled water recovery pipe according to claim 8, further comprising an outdoor temperature adjusting pipe that is attached to solar heat after at least a part of the waste water flowing into the circulation tank is exposed to solar heat. Freezing and condensing wastewater treatment equipment.   A reuse water supply pipe for supplying the reuse water obtained by the reuse water generating means to the outside of the apparatus is attached, and a sunlight irradiated part is provided in a part of the supply pipe, the sunlight irradiated part. The freeze-concentrated wastewater treatment apparatus for collecting reused water according to claim 8, wherein a pipe downstream from at least partially passes through the circulation tank.   An ice making tank in which the reuse water generating means is provided below the supercooling release means and waste water from a waste water source is injected, a washing means for washing ice particles discharged from the ice making tank, and the washing The freeze-concentrated wastewater treatment apparatus for collecting reused water according to any one of claims 1 to 10, characterized in that it comprises a separator that separates the washing water discharged from the means and the ice particles. .   The freeze-concentrated wastewater treatment apparatus for collecting reused water according to claim 11, wherein the washing means is a washing tank filled with clean water.   The freeze-concentrated wastewater treatment apparatus for collecting reused water according to claim 11, wherein the washing means is a hot air apparatus.   The freeze-concentrated wastewater treatment apparatus for collecting reused water according to claim 11, wherein the cleaning means is a shower apparatus for spraying clean water.   The reuse water generating means has a rotating shaft to which the supercooling release means is fixed at the tip, and an inverted conical solid-liquid separation wall fixed to the rotating shaft so as to surround the rotating shaft. The freeze-concentrated wastewater treatment apparatus for collecting reused water according to any one of claims 1 to 10, wherein the apparatus is a centrifugal separator.   The reuse water supply pipe which supplies the reuse water produced | generated by the said reuse water production | generation means out of an apparatus is attached, and the sterilization structure by a solar heat is provided in this supply pipe, The said claim 1 characterized by the above-mentioned. The freeze-concentrated wastewater treatment apparatus for recovering reused water according to any one of 15.

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