JP4906709B2 - Waste liquid purification equipment - Google Patents

Description

  The present invention relates to a purification device for purifying waste liquid discharged from the restaurant industry or the like. More particularly, the present invention relates to a waste liquid purifying apparatus for removing oil from a waste liquid in a kitchen of a restaurant or the like and processing it.

  It is obliged to purify the waste liquid discharged from the commercial kitchen and drain it into the sewage after purifying the oil contained therein. In general, a grease trap using a septic tank is used for this purification work. Patent document 1 is an example thereof, and a grease trap using a septic tank is disclosed (see FIG. 6).

  As shown in FIG. 6, the grease strap is divided into a first treatment tank and a second treatment tank by a partition wall 6, and an indoor side path 7 and an outdoor side path 10 are connected. Furthermore, a trap wall is provided and the second treatment tank is divided into two. A supply / exhaust opening 14 lacking the lower part of the partition wall 6 is provided. The drainage is discharged downward from the outlet of the indoor path 7, and coarse dust is removed by the filter frame 9, and the oil floats and accumulates in the upper layer of the first treatment tank. This floating oil is indicated by 16 in the figure.

  The drainage from the indoor side path 7 passes near the bottom of the grease strap, passes through the supply / discharge opening 14 and enters the second processing tank from the first processing tank. When the drainage liquid passes over the trap wall and moves to the outdoor side path 10, impurities having a specific gravity higher than that of water precipitate and accumulate, and the drainage liquid is discharged from the outdoor side path 10. If the grease trap becomes more dirty or clogged due to drainage, drainage, etc. from the kitchen after a certain period of time, remove the lid 13 and remove oil and dust from the first treatment tank and the second treatment tank. , As well as cleaning and cleaning to remove precipitates.

  Thus, the inside of the general grease trap septic tank is divided into a plurality of staying regions by the partition walls. The waste oil is separated according to the specific gravity, and the oil component having a small specific gravity stays in the upper part of the septic tank and is periodically sucked up by a vacuum tube or the like and collected. In addition, many grease traps are injected with ozone or ionized air. For example, Patent Document 2 discloses an apparatus for purifying a waste liquid tank as an example.

  This apparatus uses a highly active gas such as ozone or negative ions to improve the waste liquid. The purification apparatus includes an introduction pipe for introducing and aeration of gas between a plurality of partition walls along the flow path direction of the purification tank, and a negative ion generation apparatus provided on the proximal end side of the introduction pipe It is composed of The negative ion generator includes a negative ion generator and a delivery pump for sending negative ion gas generated by the negative ion generator to an introduction tube.

  The negative ion generator is accommodated in a box, the negative ion generator is provided in a cartridge box, and the cartridge box is exchangeably accommodated in a slot provided in a part of the box. In this apparatus, the effect of aeration is improved by bringing the negative ion generator as close as possible to the waste liquid. Moreover, many things are disclosed as an anion generator (for example, refer patent documents 3-4). In these techniques, a voltage of several thousand volts is provided between two electrodes and the principle of corona discharge is generally used.

A predetermined distance is provided between the needle-like negative electrode and the ground, and ions generated from the negative electrode by silent discharge are directed toward the ground. At the same time, when air is fed by a blower pump, the negative ions can be contained and transported. The purpose of the waste liquid tank purification apparatus disclosed in Patent Document 2 is to send the air ionized by these methods to the waste liquid tank.
Japanese Patent Laid-Open No. 2002-213013 JP 2006-314985 A JP 2004-79388 A JP 2002-198160 A

  However, in the above-described purification apparatus, there are various problems in order to efficiently inject the generated negative ions into the waste liquid. Since the effect of negative ions tends to decrease as the distance from the ion generator increases, it is preferable that the distance between the ion generator and the waste liquid is short. In the case of Patent Document 2, the ion generator is installed inside the introduction tube in order to shorten the distance between the ion generator and the waste liquid. For this reason, the degree of freedom is considerably limited in apparatus design and actual installation work.

  Furthermore, conventionally, the piping of the path for carrying negative ions to the waste liquid has been generally made of a non-conductive material. Thus, when it is made of a non-conductive material, charging occurs in the tube and negative ions stay on the path, which suppresses the generation of negative ions. For example, when negative ions generated by a negative ion generator are carried by one meter with a tube made of vinyl chloride resin and measured with an ion measuring device, negative ions may not be detected at all.

The present invention has been made based on the technical background as described above, and achieves the following objects.
An object of the present invention is to provide a waste liquid purifying apparatus that efficiently guides generated negative ions to a waste liquid.

Purification apparatus for waste of the present invention, a blower in the air supply device for supplying the ion generating means of the ionization unit became sealed structure for generating negative ions is provided an air, the negative ions A waste liquid comprising: a diffuser tube for blowing the air containing air; and a treatment tank for storing and treating the waste liquid in order to purify the waste liquid by injecting the air containing the negative ions from the diffuser pipe The air diffuser tube is formed of a conductive material so as to ensure conductivity to the end of the air diffuser tube, and when the air diffuser tube is composed of two or more members, the member The ion generating means is formed of a conductive material formed in a box shape, and a generating cylinder provided with a space partitioned inside, Stored in the generating cylinder The lead wire is connected to the negative electrode side of the power source, the generator tube is connected to the positive side of the power source, and the positive electrode is completely connected to the negative electrode. a structure enclosing the said supply port blower, is connected the diffuser tube to the outlet, the air from the blower, after containing the negative ions generated by corona discharge generated from the electrode in the generator tube, is discharged to the sparge tube through the discharge port, a portion of the diffuser tube is characterized in that it constitutes a so that exist in the waste liquid in the processing bath.

The waste liquid purifying apparatus of the present invention is characterized in that a voltage applied between the electrode and the generating cylinder is a DC voltage of 3000 V or more and 3200 V or less. The material of the electrode may be tungsten wire or carbon fiber .

  The portion of the diffuser pipe contained in the waste liquid is characterized in that a small hole is formed as one or more through holes formed facing downward to eject the air. The generating cylinder is formed in a cylindrical shape, and the electrode is located near a center line of the cylinder.

  The generating cylinder is formed in a spherical shape, and the electrode is positioned near a center point of the sphere. The generating cylinder is formed in a box shape, and the electrode is located near the center of the box shape.

The present invention has the following effects.
The waste liquid purification apparatus of the present invention was able to sufficiently purify the waste liquid of restaurants. Moreover, the bad odor could be removed.
Further, since the generating cylinder and the diffuser tube are conductive members, it has become possible to introduce air containing a high concentration of negative ions into the waste liquid.

  Furthermore, it is possible to have a considerable distance between the negative ion generating means and the treatment tank, and the degree of freedom in designing the apparatus is increased. Furthermore, since the structure is made up of simple and inexpensive parts, the device itself can be provided at a low price, and maintenance during operation becomes easy.

[Overall structure of the device]
The outline of the present invention will be described with reference to the drawings. FIG. 1 shows an outline of a waste liquid purifying apparatus 1 according to the present invention. The waste liquid purification device 1 of the present invention is for purifying waste liquid, miscellaneous water, and the like discharged from restaurants and the like. The waste liquid and miscellaneous water discharged from restaurants and the like are hereinafter collectively referred to as waste liquid. Waste liquid contains garbage, detergent, oil, etc.

  Specifically, the waste liquid is purified by separating the components of the waste liquid according to the specific gravity using the grease trap 2. Furthermore, the ionized air is aerated in the waste liquid to promote the waste liquid purification operation. The waste liquid purification device 1 includes a grease trap 2, an air supply device 3, and an air diffuser 4. The air supply device 3 is a device for providing the grease trap 2 with air containing negative ions. The air discharged from the air supply device 3 is supplied into the grease strap 2 through the air diffuser 4.

  The grease strap 2 includes a treatment tank 12. The treatment tank 12 is separated into a plurality of regions by the partition wall 6. In the example of FIG. 1, the grease strap 2 is separated into four regions by three partition walls 6. The shape and number of the partition walls 6 are not limited, and vary depending on the properties and components of the waste liquid and the waste liquid purification standards.

  The waste liquid is supplied to the grease trap 2 from the supply port 8, purified through a plurality of regions in the treatment tank 12, and discharged from the discharge port 10. A supply / exhaust opening 14 lacking the lower part of the partition wall 6 is provided. The waste liquid supplied to the grease strap 2 passes near the bottom of the processing tank 12 and is supplied to the adjacent region through the supply / discharge opening 14. In each region, garbage, detergent and oil are separated by their specific gravity. The oil having a small specific gravity floats and accumulates in the upper layer of the treatment tank 12.

  In the figure, 16 represents a floating oil component. In each region, the air diffuser 4 supplies air ionized by negative ions. This air disturbs each area and promotes separation and treatment of garbage, detergent, oil, etc. contained in the waste liquid. Still, there remains residue that cannot be disassembled. It is preferable that the grease trap 2 is cleaned after a certain period of time has elapsed after operating this device.

[Air supply device 3]
The air supply device 3 includes an ionization unit 20 for ionizing air, a blower 22 for supplying air to the ionization unit 20, and a power supply 24 for supplying power to the ionization unit 20. As illustrated in FIG. 1, the ionization unit 20, the blower 22, and the power supply 24 are accommodated in the housing 3 a. The entire housing 3a is also referred to as a main body of the waste liquid purification apparatus 1 of the present invention. The diffuser 4 is mechanically and electrically connected to the ionization unit 20.

  The housing 3a is preferably made of a conductive material for the reason described later. The blower 22 can use any device as long as it supplies air. In this invention, since the existing air blower is used, the detailed structure and operation | movement are abbreviate | omitted. In addition, although ventilation performance is mentioned later, 80-120L per minute is suitable. As the power source 24, any power source device can be used as long as it can supply a necessary voltage to the ionization unit 20.

  For example, a commercial AC power supply may be boosted and converted to a DC power supply. Further, a DC power source such as a battery may be used. Therefore, the detailed structure and operation are omitted. Although the supply voltage will be described later, a direct current of 3000 to 3200 volts is appropriate. The air supply device 3 ionizes the air supplied from the blower 22 with negative ions generated by the ionization unit 20 and discharges the air to the diffuser tube 4.

  FIG. 2 illustrates an overview of the ionization unit 20 in the air supply device 3. FIG. 3 similarly shows a cross-sectional view of the ionization section 20. The ionization unit 20 includes a metal generation tube 26, a lead wire 32, an electrode 40, and the like stored therein. The generating cylinder 26 is formed in a box shape and is provided with a supply port 28 and a discharge port 30. The blower 22 is connected to the supply port 28, and the air diffuser 4 is connected to the discharge port 30. The air from the blower 22 contains the negative ions generated from the electrode 40 in the generating cylinder 26, and then is discharged to the diffuser tube 4 through the discharge port 30.

  Next, details of the inside of the ionization unit 20 will be described. The generating cylinder 26 is formed of a conductive metal member in a box shape, and a lead wire 32 is inserted from an upper hole 36. The ionization unit 20 has a sealed structure, and the lead wire 32 and the generating cylinder 26 are sealed with a seal member 38. The lead wire 32 is connected to the negative electrode side of the power supply 24 via the cord 24a. The generating cylinder 26 is connected to the positive electrode side of the power supply 24 via the cord 24b.

  As a result, the positive electrode is completely included in the negative electrode. It is preferable that the cord 24b is connected not to the generating cylinder 26 directly but to the housing 3a that fixes it. That is, it is preferable to be connected to the housing 3 a that is electrically connected to the generating cylinder 26. By doing so, the equipotentiality at each part in the generating cylinder 26 is enhanced. A plurality of electrodes 40 are attached to the tip of the lead wire 32. The electrode 40 is made of a collection of fine carbon fibers or tungsten wires. That is, the electrode 40 is preferably formed by bundling a large number of tungsten wires or carbon fibers. The electrode fixture 39 fixes the electrode 40 and the lead wire 32 while ensuring conductivity.

  The electrode 40 has a pointed tip, and negative ions are mainly released from this pointed portion into the air by the principle of corona discharge. The principle of ion generation uses the principle of corona discharge by a DC power source. Corona discharge refers to continuous discharge that occurs due to the generation of a non-uniform electric field around a sharp electrode (needle electrode). Thereby, since ions can be increased in the gas, it is applied to a dust collector or the like. Note that the current flowing by corona discharge is extremely small, only about several μA.

  The electrode 40 is electrically connected to the negative side of the power source 24, and the generating cylinder 26 is electrically connected to the positive side of the power source 24, and a DC voltage of 3000 to 3200 volts is applied between the two. However, the two are insulated with air, and this insulation is not broken as long as an appropriate distance is maintained. Therefore, a large amount of negative ions are continuously released from the tip of the electrode 40. A large amount of pressurized air from the blower 22 flows into the generating cylinder 26 through the supply port 28.

  This air develops at a stretch from the narrow supply port 28 into the wide generation cylinder 26, and thus becomes turbulent, and carries negative ions released from the electrodes 40 around the generation cylinder 26. And the part is adsorb | sucked by an inner wall. Here, if the generation cylinder 26 is formed of a non-conductor even at a part, a charging phenomenon occurs at that part, and negative ions stay in the generation cylinder 26. This suppresses the generation of negative ions from the electrode 40, and the negative ion concentration of air from the discharge port 30 is significantly reduced.

  In the present invention, the generating cylinder 26 is made of a conductive metal and is electrically connected to the positive side of the power source 24. For this reason, the negative ions in contact with the inner wall flow toward the power source 24 as free electrons, so that no charging phenomenon occurs at the contact point, and no negative ions stay in the generating cylinder 26. Accordingly, generation of negative ions from the electrode 40 is not suppressed. Therefore, even if the generated negative ions are somewhat reduced, the degree thereof is small, and as a result, a large amount of negative ions can be delivered from the outlet 30.

  Negative ions are inherently very unstable and prone to decay. It is also reduced by the turbulent air flow inside the generating cylinder 26, and is also reduced by being adsorbed on the wall surface in the generating cylinder 26. Therefore, it is necessary to apply a considerable voltage between the electrodes in order to ensure a sufficient amount of negative ions generated in consideration of these reductions. According to various studies, DC 3000-3200 volts is appropriate. If the voltage is further increased, ozone is generated, which is inappropriate.

  The generating cylinder 26 has one or more holes 36 for inserting the lead wires 32 into the generating cylinder 26. A fixing plate 34 is provided on the upper surface of the generating cylinder 26 and is fixed by a set screw 35 or the like. The fixing plate 34 has a hole 36, and the lead wire 32 enters the generating cylinder 26 from the hole 36. Further, a seal member 38 is provided so that the lead wire 32 does not move. The seal member 38 is preferably an insulator. The lead wire 32 is connected to the negative side of the power source 24 through the cord 24a. The generating cylinder 26 is connected to the positive side of the power supply 24 via the cord 24b.

  It is necessary to have a certain distance between the lead wire 32 and the generating cylinder 26. In the examples described later, this distance was specifically a distance of 2 to 3 cm. The higher the applied voltage, the more this distance increases to maintain insulation. If this distance is short, insulation is broken and spark discharge occurs. As a result, since corona discharge is suppressed, negative ions are not generated. Of course, the distance between the electrode 40 and each inner wall of the generating cylinder 26 is preferably as equal as possible, and the electrode 40 is preferably set so as to be positioned in the middle of the space in the generating cylinder 26.

  The device 1 of the present invention is used continuously for a long time. Therefore, the generating cylinder 26 needs to withstand strong air pressure from the blower 22. For example, if air of a considerable air pressure is fed for a long time, fatigue and heat generation of the generating cylinder 26 must be taken into consideration. Since the generating cylinder 26 is made of metal, it sufficiently resists such fatigue and has a sufficient heat resistance effect. Furthermore, an existing heat dissipation device may be provided in the metal generating cylinder.

[Example illustration]
Furthermore, it illustrates from the example of the ionization part 20 of this invention. However, this example does not limit the present embodiment. 2 and 3 were 5 cm high, 5 cm long, and 10 cm wide. Measurement of negative ions coming out from the generating cylinder 26 of this size was performed. In addition, the air ion measuring device AIC-2000 manufactured by Sato Corporation (location: Yokohama, Kanagawa, Japan) was used as the ion measuring device. The most suitable voltage for generating negative ions is DC 3000V to 3200V.

  If the voltage is lower than this, the amount of negative ions generated is insufficient, and if it is higher than this, ozone is generated. In addition, fireworks discharge occurs. Therefore, a voltage in this range is optimal. As a result, 30 million negative ions / cc can be generated per electrode 40. As shown in FIG. 3, when three lead wires 32 were used, 90 million negative ions / cc could be generated. At this time, 120 L per minute was appropriate for the air flow rate of the blower 22. When two lead wires 32 were used, 60 million negative ions / cc could be generated. At this time, the air flow rate of the blower 22 was appropriate to be 80 L / min. The distance between the lead wire 32 and the generating cylinder 26 was 2 to 3 cm. As for the capacity | capacitance of the processing tank 12 of the grease trap 2, 170L and 300L are common.

[Aeration tube 4]
As shown in FIG. 1, a plurality of branch pipes 4 a are connected to the diffuser pipe 4 connected to the generating cylinder 26. Each branch pipe 4 a is installed in a plurality of regions of the processing tank 12. There are a plurality of small holes 17 at the tip of the branch pipe 4a. The ionized air supplied from the air supply device 3 enters the diffuser tube 4 and is supplied to each branch tube 4a. Finally, it is discharged from the small hole 17 and exits into the waste liquid. The ionized air exiting from the small holes 17 disturbs the waste liquid with a large pressure and promotes purification of the waste liquid.

  The air diffuser 4 is a stainless steel tube having an inner diameter of 13 mm and has a basic length of 500 mm. The branch pipe 4a is also a stainless steel pipe. A bellows type flexible pipe (for example, one having a length of 1000 mm or 600 mm) can be used for connection between the main body and the diffuser pipe 4. These connection members include L-type, T-type, and simply extended ones. By combining these members, the branch pipe 4a corresponding to the shape and size of the treatment tank 12 can be formed.

  In addition, a terminal cap for preventing intrusion of wastewater is inserted into the end of the branch pipe 4a and the like. These connecting members are preferably screw-type joints. A rubber ring is contained inside the connecting member, and airtightness and waterproofness are ensured. However, since the outside of the connection member is a metal member, conductivity to the end of the air diffuser 4 is ensured. Due to such a connection structure, a high concentration of negative ions can be carried to the end of the diffuser tube 4.

  A conductive metal material is used as the material of the diffuser tube 4 and is electrically connected to the positive side of the power source 24 through the generating cylinder 26. In this way, negative ions that have contacted the inner wall of the diffusing tube 4 become free electrons and flow toward the power supply 24, so that no charging phenomenon occurs at the contact location. Therefore, even if the negative ions are somewhat reduced, they do not stay there. Further, generation of negative ions in the ionization unit 20 is not suppressed.

  These actions are the same mechanism as that of the generating cylinder 26. By these actions, the negative ions coming out from the generating cylinder 26 smoothly reach the waste liquid. Therefore, the diffuser tube 4 and its branch tube 4a must all be conductive metal tubes. If there is a non-conducting tube such as vinyl chloride or silicon pipe in the middle, the portion will be charged and negative ions will stay there. As a result, even if a metal tube is connected to the end, no negative ions will come out and only air will flow.

  When it is absolutely necessary to use a non-conductive pipe on the way, it is necessary to electrically connect the metal pipes at both ends with a conducting member. For the same reason, it is desirable that the connection portion between the air diffusing tube 4 and the generating cylinder 26 be connected without a non-metallic member. By doing so, negative ions can be transported over a long distance, and the degree of freedom in designing the grease trap apparatus is increased.

  The underwater portion of the branch pipe 4a has one or more small holes 17. FIG. 4 illustrates an example of a cross-sectional view of the branch pipe 4a. FIG. 4 is an example in which two small holes 17 are provided in the same cross section. FIG. 5 is an example in which a small hole 17 is provided at a distance in the longitudinal direction of the branch pipe 4a. Air containing negative ions is introduced into the waste liquid through the small holes 17. Air is injected into the effluent at a high pressure and disturbs the effluent.

  The diameter of the small hole 17 is 1 mm. As shown in FIG. 4, a line connecting the center point of the small hole 17 and the center point of the cross section of the branch pipe 4a forms an angle of about 45 degrees with respect to the horizontal line. The angle of 45 degrees has a great meaning. As described above, when the small holes 17 are provided downward, the vicinity of the bottom of the treatment tank 12 can be efficiently disturbed. Further, when the blower is stopped, the amount of water entering the branch pipe 4a is small.

  In addition, the space | interval of the small hole 17 is a 30 mm space | interval along the longitudinal direction of the branch pipe 4a as shown in FIG. Further, it is not necessary to provide a plurality of small holes 17 in the same cross section as shown in FIG. In addition, it is desirable that the waste liquid purifying apparatus 1 of the present invention does not enter the branch pipe 4a from the small hole 17 even when the waste liquid purification apparatus 1 is in operation or not. Therefore, it is desirable that the blower 22 includes a check valve in order to prevent water from entering during the stop.

  Further, like the generating cylinder 26, the air diffuser 4 is also used continuously for a long time. For this, it is necessary to withstand a considerable amount of air pressure. For example, if air with a considerable air pressure is fed for a long time, fatigue of the diffuser 4 and heat generation must be taken into consideration. Since the air diffuser 4 is made of metal, for example, stainless steel, it sufficiently withstands fatigue and has a sufficient heat resistance effect. Moreover, since it is stainless steel, it hardly corrodes even in water. Therefore, it can be used for a long time without maintenance.

[Effects of the entire device]
The effect of the waste liquid purification device as a whole can be confirmed by measuring the oil content contained in the waste liquid. In a plurality of restaurants where the waste liquid purification device 1 of the present invention was installed, the normal hexane value of waste water treated with the waste liquid of the restaurant was measured. The resulting data is shown in Table 1 below. The first column of Table 1 indicates the type of drainage, the type of restaurant, the location, and the like. The second column indicates the number of operating days, which is the number of days from the date when the waste liquid purification device 1 is installed to the date of inspection.

The third column and the fourth column represent the measurement data of the normal hexane value. The third column shows the measured value of the normal hexane value before installing the waste liquid purifying device 1, and the fourth column shows the measured value on the inspection date after a certain number of days after installation. These figures are “certification method according to the drainage standards established by the Minister of the Environment based on the provisions of the ministerial ordinance that establishes drainage standards” (promulgated: Environmental Agency Notification No. 64 on September 30, 1974, final revision: June 2001) According to Ministry of the Environment Notification No. 37 of March 13), the normal hexane extractable substance content was measured.
The fifth column shows the improvement ratio of the normal hexane value. The improvement magnification is simply a value obtained by dividing the value in the third column by the value in the fourth column.

  According to these measurement results, it can be seen that by introducing the waste liquid purifying apparatus 1 of the present invention, the index indicating the degree of contamination of the wastewater, such as the normal hexane extract substance content, is greatly reduced. Negative ions also have a high deodorizing effect. Since there is no harm to the human body, cleaning and maintenance of the treatment tank 12 is easy. Furthermore, the purification apparatus 1 of the present invention has the advantage that it can be applied to existing septic tanks simply by performing a simple construction.

[Other Embodiments]
The generation cylinder 26 of the ionization unit 20 may be formed in a cylindrical shape inside. Several lead wires 32 are inserted there. If the electrode 40 at the tip of each lead wire 32 is disposed so as to be positioned at the center of the cylinder, a sufficient distance can be maintained with respect to any inner wall of the generating cylinder 26. Thereby, generation | occurrence | production of a fireworks discharge can be suppressed beforehand and a negative ion can be generated efficiently. In addition, when there is only one lead wire 32, the generating cylinder 26 of the ionization unit 20 may be spherical.

The apparatus of the present invention may be used for wastewater treatment in the food and beverage industry. Furthermore, it may be used to purify waste liquid discharged from homes, factories, and the like. Furthermore,
The apparatus of the present invention can be applied to existing septic tanks by simple construction.

It is the schematic of the waste liquid purification apparatus of this invention. It is a general-view figure of the ionization part of the purification apparatus of the waste liquid of this invention. It is sectional drawing of the ionization part of the purification apparatus of the waste liquid of this invention. It is a figure which shows the example of sectional drawing of the branch pipe of the diffuser pipe | tube of the waste liquid purification apparatus of this invention. It is a figure which shows the example which provided the small hole in the branch pipe of the diffuser pipe | tube of the waste liquid purification apparatus of this invention. It is the schematic of the conventional grease strap.

DESCRIPTION OF SYMBOLS 1 .... Waste liquid purification device 2 .... Grease strap 3 .... Air supply device 4 .... Air diffuser tube 6 .... Partition wall 17 ... Small hole 12 ... Treatment tank 16... Floating oil 20... Ionization unit 22... Blower 24. Wire 34 ... Fixed plate 30 ... Discharge port 38 ... Seal member 40 ... Electrode

Claims (7)

A blower in the air supply system for supplying air, and the ion generating means of the ionization unit became sealed structure for generating negative ions is provided for blowing the air containing the negative ions and sparge tube, by injecting the air containing the negative ions from the air diffusing pipe, a treatment tank and purification apparatus for waste consisting for processing stored the waste in order to perform the purification of waste, said diffuser The trachea is formed of a conductive material to ensure conductivity to the end of the diffuser tube, and when the diffuser tube is composed of two or more members, the connection between the members is conductive The ion generating means has a connecting member and is formed of a conductive material formed in a box shape, and includes a generating cylinder having a space partitioned inside, a lead wire stored in the generating cylinder, and Electrodes, and even It consists of a supply port and a discharge port connected to the raw cylinder, the lead wire is connected to the negative electrode side of the power source, the generating cylinder is connected to the positive side of the power source, and the negative electrode is completely included in the positive electrode, the supply port blower, is connected the aeration tube in the outlet, the air from the blower, after containing the negative ions generated by corona discharge generated from the electrode in the generator tube, discharge the sparge tube through the discharge port is, purifier waste portion of said diffuser tube, characterized in that the configuring in so that exist in the waste liquid in the processing bath. 2. The waste liquid purification apparatus according to claim 1, wherein a voltage applied between the electrode and the generating cylinder is a DC voltage of 3000 V or more and 3200 V or less. The waste liquid purification apparatus according to claim 1 or 2, wherein a material of the electrode is tungsten wire or carbon fiber. 4. The apparatus for purifying waste liquid according to claim 1 or 3 , wherein the portion of the air diffuser tube contained in the waste liquid is formed with one or more through holes formed facing downward to eject the air. A device for purifying waste liquid, wherein a small hole is formed. 2. The waste liquid purification apparatus according to claim 1, wherein the generating cylinder is formed in a cylindrical shape, and the electrode is positioned near a center line of the cylinder. 2. The waste liquid purifying apparatus according to claim 1, wherein the generating cylinder is formed in a spherical shape, and the electrode is positioned near a center point of the sphere. 2. The waste liquid purification apparatus according to claim 1, wherein the generating cylinder is formed in a box shape, and the electrode is located near a center of the box shape.

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