JP2016016376A - Wastewater purification apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wastewater purification apparatus of which a size can be reduced.SOLUTION: A wastewater purification apparatus (100a) includes: a drum (120) which has an outer cylinder (121) formed of a mesh and is driven to rotate; a wastewater supply part (110) which supplies wastewater to an inside of the drum (120) so as to accumulate the wastewater in the inside of the drum (120); a purified water receiving part (140) which is arranged beneath the drum (120) and receives purified water passing through the mesh of the outer cylinder (121); a gas supply part (160) which blows gas from an external to the inside at an upper part of the drum (120) and separates a pollutant adhered on an inner circumferential surface of the outer cylinder (121) from the outer cylinder (121); and a pollutant discharge part (170) which guides the pollutant separated by the gas supply part (160) to the external of the drum (120).SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wastewater purification device, and more particularly to a wastewater purification device containing pollutants.

  JP, 2013-22503, A (patent documents 1) is mentioned as a purification device which obtains purified water by separating pollutants from waste water containing pollutants, for example. In this Patent Document 1, a micro floc is formed by stirring waste water and an inorganic flocculant solution for the purpose of treating waste water without causing a reduction in processing capacity due to clogging or the like. The agglomerate flocs with good sedimentation are formed by stirring the wastewater in which water is formed, the precipitation accelerator and the polymer flocculant solution. A system for solid-liquid separation of waste water into coagulated floc containing and purified water as a supernatant is disclosed.

JP 2013-22503 A

  However, in the system disclosed in Patent Document 1 described above, solid-liquid separation that performs solid-liquid separation into a rapid stirring tank that forms micro flocs, a floc-forming layer that forms aggregated flocs with good sedimentation, and aggregated flocs and purified water. At least a tank is required. For this reason, since a space for installing three or more tanks is required, there is room for improvement in downsizing of the system.

  This invention makes it a subject to provide the waste water purification apparatus which aims at size reduction in view of the said problem.

  The waste water purification device of the present invention is a device for purifying by separating pollutants from waste water containing pollutants, and comprises a drum, a drainage supply unit, a purified water receiving unit, a gas supply unit, and pollutant discharge Department. The drum has an outer cylinder formed of a mesh and is driven to rotate. The drainage supply unit supplies drainage into the drum in order to store the drainage in the drum. The purified water receiver is disposed below the drum and receives purified water that has passed through the mesh of the outer cylinder. A gas supply part sprays gas toward the inside from the outside in the upper part of a drum, and isolate | separates the contaminant adhering to the internal peripheral surface of an outer cylinder from an outer cylinder. The pollutant discharge unit guides the pollutant separated by the gas supply unit to the outside of the drum.

  Preferably, the waste water purification apparatus of the present invention further includes an aggregating means for aggregating contaminants in the waste water stored in the drum.

  In the waste water purification apparatus of the present invention, preferably, the aggregating means includes an electrolysis device, the electrolysis device has one electrode and the other electrode, the one electrode is located in the waste water stored in the drum, and the other electrode is the drum. The member which comprises is used.

  In the wastewater purification apparatus of the present invention, the aggregating means may include a flocculant supply unit that supplies the flocculant into the wastewater stored inside the drum.

  Preferably, the waste water purification apparatus of the present invention further includes a purified water supply unit that supplies purified water received by the purified water receiving unit to the inside of the drum.

  In the waste water purification apparatus of the present invention, the outer cylinder is preferably 400 mesh or more and 600 mesh or less.

  In the wastewater purification apparatus of the present invention, the drum is preferably configured to be driven to rotate at 1 rpm (rotation / minute) or less.

  In the waste water purification apparatus of the present invention, preferably, the waste water supply unit includes a drain water receiving tank for storing waste water and a pump for sending the waste water from the drain water receiving tank to the drum, and the pump is a volume type.

  According to the waste water purification apparatus of the present invention, downsizing can be achieved.

It is a schematic diagram which shows the waste water purification apparatus of embodiment of this invention. It is a schematic diagram which shows another waste water purification apparatus of embodiment of this invention. It is a perspective view showing roughly the drum, gas supply part, and pollutant discharge part which constitute the drainage purification device of an embodiment of the invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following drawings, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated.

  With reference to FIGS. 1-3, the waste water purification apparatus of one Embodiment of this invention is demonstrated. As shown in FIGS. 1-3, the waste water purification apparatus 100a, 100b of embodiment of this invention is an apparatus which purifies by isolate | separating a pollutant from the waste_water | drain containing a pollutant. The drainage purification apparatuses 100a and 100b include a drainage supply unit 110, a drum 120, an electrolyzer 130 as an aggregating means, a purified water receiving unit 140, a purified water supply unit 150, a gas supply unit 160, and pollutants. A discharge unit 170 is mainly provided.

  The drainage supply unit 110 supplies drainage into the drum, and includes a drainage receiving tank 111, a first pipe 112, a pump 113, and a second pipe 114. A first pipe 112 is connected to the drain water receiving tank 111, a pump 113 is connected to the first pipe 112, and a second pipe 114 is connected to the pump 113. The drainage water tank 111 stores wastewater containing pollutants. The first pipe 112, the pump 113, and the second pipe 114 supply the waste water in the waste water receiving tank 111 to the drum 120. The pump 113 is not particularly limited, but is preferably a volumetric pump, more preferably a rotary pump, a diaphragm pump or a piston from the viewpoint of sending waste water to the drum 120 while suppressing crushing and dispersion of contaminants. Even more preferred is a pump.

  The drum 120 is located at the outlet of the second pipe 114. The drum 120 includes an outer cylinder 121 and is arranged so that the axis of the outer cylinder 121 extends in the horizontal direction. Drainage is supplied from the drainage water receiving tank 111 to the inside of the outer cylinder 121 of the drum 120 via the first pipe 112, the pump 113, and the second pipe 114, and the drainage is stored inside the drum 120. As shown in FIG. 3, the drum 120 of the present embodiment includes a cylindrical outer cylinder 121, a covering portion 122 that covers the entire surface of one opening of the outer cylinder (the right opening of the drum 120 in FIG. 3), and an outer cylinder. And a flange 123 extending inward from the outer cylinder 121 so as to block a part of the other opening of 121 (the left opening of the drum 120 in FIG. 3), and drainage is supplied from the opening of the flange 123. .

  The outer cylinder 121 is formed of a mesh (porous) and serves as a filter for separating contaminants in the drainage. In FIG. 3, the mesh is illustrated in a rough stripe shape for convenience, but is actually a lattice shape and rough enough to temporarily store drainage. The outer cylinder is preferably 400 mesh or more and 600 mesh or less, and more preferably 400 mesh or more and 500 mesh or less. In the case of 400 mesh or more and 600 mesh or less, it is easy to discharge the purified water separated from the pollutant while storing the drainage in the lower part of the drum 120. In the case of 400 mesh or more and 500 mesh or less, the time for separating the pollutant from the waste water to obtain purified water can be shortened. In addition, a hole may be formed in the outer cylinder. In this case, the outer cylinder preferably has a hole of 1 μm to 40 μm, and preferably has a hole of 5 μm to 15 μm. preferable.

  In addition, although the coating | coated part 122 and the collar part 123 may be formed with the same mesh as the outer cylinder 121, it can store waste_water | drain inside and does not play the role of a filter (suppresses adhesion of contaminants), From the viewpoint of preventing the purified water from leaking, it is preferable that there is no gap. That is, it is preferable that the outer cylinder 121 is formed of a mesh, and the covering portion 122 and the flange portion 123 are formed of a material having no holes.

  The material constituting the drum 120 is not particularly limited, and may be a non-metal such as cloth. However, from the viewpoint of durability, a metal is preferable, and stainless steel (SUS) is more preferable. When the drum 120 is made of stainless steel, wear deterioration is small and replacement is unnecessary over a long period of time, so that the service life can be improved. Moreover, the material which comprises the coating | coated part 122 and the collar part 123 may differ from the outer cylinder 121, and may be the same. When the aggregating means described later is an electrolysis apparatus and the covering portion 122 is used as an electrode, the outer cylinder 121 and the covering portion 122 are preferably made of the same metal.

  The drum 120 is configured to be rotationally driven about the axis of the outer cylinder 121, and is preferably configured to be rotationally driven at 1 rpm or less. By slowly rotating the drum 120 in this manner, the drum 120 is formed so that the centrifugal force hardly acts on the drum 120. In order to rotate the drum 120, a drive member (not shown) may be provided. The driving member is, for example, a motor.

  A water level sensor (not shown) may be provided in the drum 120 in order to measure the amount of waste water staying in the lower part of the drum 120. In addition, a control unit that measures the amount of drainage stored in the lower part of the drum 120 using this water level sensor and controls the pump 113 to supply the drainage so that a certain amount of drainage stays in the lower part of the drum 120 (see FIG. (Not shown) may be provided.

  An aggregating means is provided for aggregating the contaminants in the wastewater stored in the lower part of the drum 120. The aggregating means is not particularly limited. For example, the aggregating means may include an aggregating agent supply unit (not shown) for supplying the aggregating agent into the waste water. When the contaminant is metal powder, the metal powder is aggregated. However, it is preferable that the electrolysis apparatus 130 is included.

  Here, agglomeration of contaminants when the electrolyzer 130 is used will be described. In general, contaminants are positively or negatively charged and repel each other due to their charge. For this reason, the pollutant in waste water is in the state which is hard to aggregate. However, when negative ions and cations are supplied into the waste water using the electrolyzer 130, the positive charge or negative charge of the pollutant is neutralized. For this reason, since aggregation of a contaminant can be accelerated | stimulated, the condensation floc of colloidal particles can be grown.

  When the aggregating means includes the electrolyzer 130, the drum 120 preferably serves as an electrode. Specifically, the electrolyzer 130 has one electrode 131, the other electrode 132, and a power source 133. On the other hand, the electrode 131 is located in the drainage stored in the drum 120, and is provided, for example, at a position 1 mm or more and 10 mm or less, preferably about 5 mm away from the inner peripheral surface of the outer cylinder 121. The other electrode 132 is a member that constitutes the drum 120, and in the present embodiment, the electrode 132 is a covering portion 122 that is continuous with the outer cylinder 121. In FIGS. 1 and 2, only the covering portion located in the vicinity of the shaft is shown as the other electrode 132. The power supply 133 is preferably a DC power supply.

  One electrode 131 and the other electrode 132 are not particularly limited as long as the ionization tendency is different, but when the ionization tendency of the one electrode 131 is larger than the ionization tendency of the other electrode 132 as shown in FIGS. On the other hand, the electrode 131 becomes an anode, and the other electrode 132 becomes a cathode. As such a combination, for example, one electrode 131 is made of aluminum, and the outer cylinder 121 and the covering portion 122 of the drum 120 serving as the other electrode are made of SUS. When the stored wastewater is acidic, the member constituting the drum 120 serving as the other electrode 132 may be made of a metal having a low ionization tendency, and the electrode 131 may be made of a metal having a high ionization tendency.

  A purified water receiver 140 is disposed below the drum 120. The purified water receiver 140 receives purified water that has passed through the mesh of the outer cylinder 121. That is, the purified water receiving unit 140 stores the purified water from which the contaminants are removed from the waste water. The purified water receiving part 140 may be close to the drum 120. That is, the purified water receiver 140 may be in contact with the drum 120, and the upper end of the purified water receiver 140 may be located below the lower end of the drum 120. However, from the viewpoint of preventing the wastewater stored in the drum 120 from entering the purified water receiver 140, it is preferable that the upper end of the purified water receiver 140 is disposed below the lower end of the drum 120.

  The purified water stored in the purified water receiver 140 has reduced contaminants compared to the wastewater stored in the drain water receiving tank 111, but in order to further separate the contaminants in the purified water, the purified water receiver A purified water supply unit 150 that supplies purified water received by the unit 140 to the inside of the drum 120 is provided. As shown in FIG. 1, the purified water supply unit 150 may have a pipe 151 that connects the purified water receiving unit 140 and the pump 113, and as shown in FIG. 2, the purified water receiving unit 140 and the drum A pipe 153 that connects to the pump 120 and a pump 154 that supplies purified water to the drum 120 may be included.

  Further, the purified water and the waste water may be mixed and supplied to the drum 120, and the step of supplying the purified water to the drum 120 and the step of supplying the waste water to the drum 120 are configured to be performed separately. Also good. In the former case, in the waste water purification apparatus 100a of FIG. 1, it can be realized by opening the drainage valve 115 and the purified water valve 152 disposed in front of the pump 113, and in the wastewater purification apparatus 100b of FIG. It can be realized by simultaneously starting the pump 113 for drainage supply and the pump 154 for purified water. In the latter case, the waste water purification apparatus 100a in FIG. 1 can be realized by opening one of the drainage valve 115 and the purified water valve 152 in front of the pump 113 and closing the other, and the waste water purification apparatus 100b in FIG. Then, it can be realized by starting one of the pump 113 for drainage supply and the pump 154 for purified water and stopping the other.

  As shown in FIGS. 1 and 2, the contaminants separated from the waste water at the lower part of the drum 120 adhere to the inner peripheral surface of the outer cylinder 121 and are moved upward by the rotational driving of the outer cylinder 121. In order to remove the contaminants attached to the outer cylinder 121, a gas supply unit 160 is provided above the drum 120 as shown in FIGS. That is, the gas supply unit 160 blows gas from the outside toward the inside at the upper part of the drum 120 to separate the contaminants attached to the inner peripheral surface of the outer cylinder 121 from the outer cylinder 121. Although the gas sprayed on the contaminant is not particularly limited, for example, it is air from the viewpoint of simplicity.

  The gas supply unit 160 is configured to move the spray unit 161 that sprays gas onto the pollutant, and the spray unit 161 along the axial direction of the outer cylinder (from the front side of the drawing in FIGS. 1 and 2 to the depth direction, the arrow in FIG. 3). Part (not shown). In the present embodiment, the spray unit 161 is a nozzle that injects air, and the drive unit enables the spray unit 161 to reciprocate along the axial direction.

  In order to guide the contaminants separated from the inner peripheral surface of the outer cylinder 121 by the gas supply unit 160 to the outside of the drum 120, a contaminant discharge unit 170 is provided. The pollutant discharge unit 170 includes a pollutant receiving unit 171, a discharge pipe 172, and a pollutant tank 173.

  The pollutant receiving part 171 is arranged so as to extend along the entire position facing the moving direction of the spraying part 161 of the gas supply part 160 and receives the pollutant separated from the outer cylinder 121 by the gas supply part 160. is there. The pollutant receiving portion 171 of the present embodiment is a cylindrical body extending along the axial direction, and has a cylindrical slit shape having a cylindrical portion 171a and an opening 171b. The opening 171 b is formed at a position facing the spraying part 161 of the gas supply part 160 through the mesh of the outer cylinder 121. The opening 171b expands in a letter C shape in a cross-sectional view and is formed of a guide plate. The cylindrical portion 171a includes a collision surface of the pollutant, and the collision surface is a curved surface to prevent the pollutant from bouncing back.

  A discharge pipe 172 is connected to the pollutant receiving part 171. The discharge pipe 172 is inclined downward and discharges contaminants to the outside of the drum 120 by its own weight. At the outlet of the discharge pipe 172, a pollutant tank 173 is provided for storing pollutants therein.

  In addition, the waste water purification apparatuses 100a and 100b of the present embodiment may further include a waste water pretreatment device (not shown). The pretreatment device is a device that supplies starch to the drainage water receiving tank 111, for example. In this case, it is suitably used for wastewater containing metal such as plating wastewater. Since a small amount of starch is dissolved in the wastewater by the pretreatment device, when the contaminants in the wastewater stored in the drum 120 are aggregated by electrolysis, the starch is converted into viscous contaminants, and the metal is adsorbed thereto. Can do.

  Then, the waste water purification method of this Embodiment is demonstrated with reference to FIGS. 1-3. The waste water purification method of the present embodiment is performed using the above-described waste water purification devices 100a and 100b.

  First, the wastewater supply unit 110 is used to supply wastewater containing contaminants to the inside of a drum 120 that has an outer cylinder 121 formed of mesh and is driven to rotate. In this step, the pump 113 is activated to supply the waste water stored in the waste water receiving tank 111 to the drum 120 via the first and second pipes 112 and 114.

  Next, while rotating the drum 120, the wastewater stored in the drum 120 is separated into purified water that has passed through the mesh of the outer cylinder 121 and contaminants that have not passed through the mesh. By performing this step, contaminants adhere to the inner peripheral surface of the outer cylinder 121, and the purified water that has passed through the mesh is stored in the purified water receiver 140.

  In this step, it is preferable to agglomerate the contaminants in the wastewater stored in the drum 120 using aggregating means. The aggregating means is not particularly limited, but it is preferable that the pollutant is aggregated by the electrolyzer 130 as described above.

  In this step, the drum 120 is driven to rotate about the axial direction. Specifically, the drum 120 is preferably driven to rotate at 1 rpm or less.

  Next, using the gas supply unit 160, gas is blown from the outside toward the inside at the upper portion of the drum 120, and the contaminants attached to the inner peripheral surface of the outer cylinder 121 are separated from the outer cylinder 121. In this step, air is used as the gas, and the air is sprayed onto the contaminants attached to the outer cylinder 121. Next, the contaminants separated from the outer cylinder 121 are guided to the outside of the drum 120 using the contaminant discharge unit 170.

  By performing the above process, it can purify | clean by isolate | separating a contaminant from the waste_water | drain containing a contaminant. By simultaneously performing the step of obtaining purified water at the lower portion of the drum 120 and the step of discharging the contaminants to the outside at the upper portion of the drum 120, the waste water can be purified efficiently, and the waste water purification device 100a can be continuously provided. 100b can be used.

  In the case of further purifying the waste water, the purified water stored in the purified water receiving unit 140 is supplied to the drum 120 using the purified water supply unit 150, and the drum 120 is rotated as described above to rotate the lower part of the drum 120. In the above, the contaminants in the purified water are adhered to the inside of the outer cylinder 121, and the purified water is further separated into the contaminants and the waste water, while the gas supply unit 160 is used at the upper part of the drum 120 to The pollutant adhering to the inner periphery is separated from the outer cylinder 121 and discharged to the outside of the drum 120. This step may be repeated.

  As described above, the waste water purification apparatuses 100a and 100b in the embodiment of the present invention are apparatuses that purify the waste by separating the contaminants from the waste water including the contaminants, and the outer cylinder 121 formed of a mesh. A drum 120 that is rotationally driven, a drainage supply unit 110 that supplies wastewater to the inside of the drum 120 in order to store the wastewater inside the drum 120, and a mesh of the outer cylinder 121 that is disposed below the drum 120. In the upper part of the purified water receiving part 140 that receives the purified water that has passed through and the drum 120, gas is blown from the outside toward the inside to separate contaminants attached to the inner peripheral surface of the outer cylinder 121 from the outer cylinder 121. A gas supply unit 160 and a contaminant discharge unit 170 that guides the contaminants separated by the gas supply unit 160 to the outside of the drum 120 are provided.

  According to the waste water purification apparatuses 100a and 100b in the embodiment of the present invention, the waste water supplied to the inside of the drum 120 passes through the mesh at the lower portion to obtain purified water. Since the drum 120 is driven to rotate, the contaminants attached to the mesh are moved to the upper part of the drum 120, and the contaminants attached to the inner peripheral surface of the outer cylinder 121 are separated from the outer cylinder 121 by the gas supply unit 160. The matter is discharged to the outside of the drum 120 by the pollutant discharge unit 170. In this way, while the purified water is separated from the waste water at the lower part of the drum 120, the contaminants are removed at the upper part of the drum 120. That is, in one drum 120, waste water can be separated into polluted substances and purified water. Therefore, since the installation space of the waste water purification apparatuses 100a and 100b can be reduced, downsizing can be achieved.

  Furthermore, the drainage purification apparatuses 100a and 100b of the present embodiment have the following effects in addition to being able to be downsized. Purified water is obtained at the lower part of the drum 120, and contaminants are discharged to the outside of the drum 120 at the upper part of the drum 120, so that the waste water can be purified continuously by rotating the drum 120. In addition, since the contaminants are separated from the outer cylinder 121 by the gas supply unit 160, clogging of the contaminants in the mesh of the outer cylinder 121 is suppressed, so that it can be used for a long time. Further, since the drum 120 is driven to rotate, the waste water is agitated, so that a member for agitating the waste water is not necessary, so that the number of parts of the waste water purification apparatuses 100a and 100b can be reduced.

  Preferably, the waste water purification apparatuses 100a and 100b in the present embodiment further include aggregating means for aggregating contaminants in the waste water stored in the drum 120.

  Thereby, since the contaminants in the waste water can be aggregated, the contaminants in the waste water stored in the drum 120 can be easily separated by the mesh of the outer cylinder 121.

  In the wastewater purification apparatuses 100a and 100b of the present embodiment, the flocculating means may include a flocculant supply unit that supplies the flocculant into the wastewater stored in the drum 120.

  When the flocculant is supplied into the wastewater by the flocculant supply unit, the contaminants in the wastewater are aggregated. For this reason, the waste water purification apparatus which can isolate | separate easily the contaminant in the waste water stored in the drum 120 is realizable.

  Preferably, in the waste water purification apparatuses 100a and 100b of the present embodiment, the aggregating means includes an electrolysis apparatus 130, and the electrolysis apparatus 130 has one electrode 131 and the other electrode 132, and the one electrode 131 is stored in the drum 120. A member constituting the drum 120 is used as the other electrode 132.

  Generally, since the pollutants are charged, they are repelled and dispersed in the waste water with the pollutant particles spaced apart. For this reason, by generating positive ions and negative ions by the electrolyzer 130, the contaminants can be neutralized in charge, so that separation from each other can be suppressed and the contaminants can be aggregated. Further, by using the member constituting the drum 120 as the other electrode 132, it is possible to reduce the parts required for the electrolyzer 130. Further, since the drum 120 is driven to rotate, the waste water is agitated, and the occurrence of bias as electrolyzed water can be suppressed. For this reason, it is possible to easily separate the contaminants in the waste water while further reducing the size. In addition, since the electrolysis apparatus 130 does not require a chemical such as a flocculant, the chemical processing is also unnecessary.

  Preferably, the waste water purification apparatuses 100a and 100b of the present embodiment further include a purified water supply unit 150 that supplies the purified water received by the purified water receiving unit 140 to the inside of the drum 120. Thereby, the quality of purified water can be raised more.

  In the waste water purification apparatuses 100a and 100b of the present embodiment, the outer cylinder 121 is preferably 400 mesh or more and 600 mesh or less.

  Accordingly, it is possible to easily realize a configuration in which the contaminants do not pass through the mesh and the purified water passes through the mesh while storing the wastewater supplied to the drum 120.

  In the waste water purification apparatuses 100a and 100b of the present embodiment, the drum 120 is preferably configured to be rotationally driven at 1 rpm or less.

  Thereby, since it can suppress that a centrifugal force is applied, it can suppress that a contaminant larger than the hole of a mesh passes.

  Preferably, in the drainage purification apparatuses 100a and 100b of the present embodiment, the drainage supply unit 110 includes a drainage receiving tank 111 that stores drainage, and a pump 113 that sends the drainage of the drainage receiving tank 111 to the drum 120. The pump 113 is a positive displacement type.

  Thereby, since the wastewater can be supplied to the drum 120 while suppressing the aggregation and pulverization of the contaminants in the wastewater, the contaminants in the wastewater can be efficiently separated.

  As described above, since the wastewater purification apparatuses 100a and 100b of the present embodiment can be reduced in size, they are used for purification of wastewater in various fields, particularly for purification of wastewater discharged from paper mills and food processing. Preferably used. When purifying such wastewater, the wastewater purification devices 100a and 100b preferably include an electrolysis device 130 that agglomerates the contaminants in the wastewater stored in the drum 120. Since such wastewater contains a lot of starch as a contaminant and is viscous, when a general filter is used, there may be a problem with the quality of the purified water passing through the general filter. In the embodiment, since the contaminants are aggregated using the electrolyzer 130, it is possible to suppress the passage through the mesh of the outer cylinder 121, so that the quality of the purified water can be maintained.

  Here, in the present embodiment, the drum 120 has been described as an example including the outer cylinder 121 of one layer, but the outer cylinder 121 may have a plurality of layers. When the outer cylinder is 400 mesh or more and 600 mesh or less, from the viewpoint of increasing the strength, an aggregate formed of a mesh coarser than 400 mesh may be disposed therein. That is, the outer cylinder includes a first layer formed of a mesh, and a second layer formed on the first layer and formed of a finer mesh than the mesh of the first layer. May be. In the case of such an outer cylinder composed of a plurality of layers, for example, the first layer is 10 mesh or less, and the second layer is 400 mesh or more and 600 mesh or less.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above-described embodiment but by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

  100a, 100b Drainage purification device, 110 Drainage supply unit, 111 Drainage water receiving tank, 112 First pipe, 113,154 Pump, 114 Second pipe, 115,152 Valve, 120 drum, 121 Outer cylinder, 122 Covering part, 123 collar part, 130 electrolyzer, 131 one electrode, 132 other electrode, 133 power supply, 140 purified water receiving part, 150 purified water supply part, 151,153 piping, 160 gas supply part, 161 spraying part, 170 pollutant discharge Part, 171 pollutant receiving part, 171a cylindrical part, 171b opening, 172 discharge pipe, 173 pollutant tank.

Claims (8)

An apparatus for purifying by separating pollutants from wastewater containing pollutants,
A drum having an outer cylinder formed of a mesh and driven to rotate;
In order to store the wastewater inside the drum, a drainage supply unit that supplies the wastewater to the inside of the drum;
A purified water receiving portion that is disposed below the drum and receives purified water that has passed through the mesh of the outer cylinder;
In the upper part of the drum, a gas supply unit that blows gas from the outside toward the inside to separate the contaminants attached to the inner peripheral surface of the outer cylinder from the outer cylinder;
A wastewater purification apparatus, comprising: a contaminant discharge section that guides the contaminant separated by the gas supply section to the outside of the drum.   The waste water purification apparatus according to claim 1, further comprising aggregating means for aggregating the contaminants in the waste water stored in the drum. The aggregation means includes an electrolysis device,
The electrolyzer has one electrode and the other electrode,
The one electrode is located in drainage stored in the drum,
The waste water purification apparatus according to claim 2, wherein the other electrode uses a member constituting the drum.   The waste water purification apparatus according to claim 2, wherein the aggregating means includes a flocculant supply unit that supplies a flocculant into waste water stored in the drum.   The waste water purification apparatus of any one of Claims 1-4 further provided with the purified water supply part which supplies the purified water received in the said purified water receiving part to the inside of the said drum.   The said outer cylinder is a waste water purification apparatus of any one of Claims 1-5 which are 400 meshes or more and 600 meshes or less.   The waste water purification apparatus according to any one of claims 1 to 6, wherein the drum is configured to be rotationally driven at 1 rpm or less. The drainage supply unit includes a drainage receiving tank that stores the drainage, and a pump that sends the drainage of the drainage receiving tank to the drum,
The waste water purification apparatus according to any one of claims 1 to 7, wherein the pump is a positive displacement type.

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