KR101742563B1 - Echo terminal disposal plant of sewage - Google Patents

Abstract

The present invention relates to an eco-friendly sewage treatment plant structure, in which sewage water to be introduced and powdered adsorbent to be charged are mixed by a mixing means having an agitating blade and an ultrasonic vibration device, and then mixed with a plurality of horizontal- The mixture of sewage and powder adsorbent is smoothly supplied to the lower primary treatment space of the treatment tank body through the pipe, and the adsorbed and precipitated water is uniformly injected into the entire treatment tank body, , It is possible to perform efficient backwashing by using the self-treated secondary treatment water as the backwash water by controlling the normal treatment mode, the water storage mode and the backwashing mode, thereby improving the quality of the final discharge water.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an eco-

The present invention relates to an environmentally friendly sewage treatment plant structure, more specifically, to a sewage treatment plant which smoothly mixes sewage and an adsorbent, thereby smoothly adsorbing and precipitating pollutants by the adsorbent, And a backwashing of the filtration yarn is facilitated so that the quality of the final effluent water can be improved.

Various methods have been developed to purify sewage, but before reaching the final sewage treatment plant, they are installed in apartment houses or apartment units, for example, to reduce the burden on the final sewage treatment plant by pre- A small facility is needed.

A method of adsorbing contaminants by injecting an adsorbent such as activated carbon, zeolite, and alumina into an adsorption tower to treat such domestic sewage or factory wastewater is known.

That is, the adsorption towers are installed side by side, adsorbents such as activated carbon, zeolite and alumina are introduced into the respective adsorption towers, the pumps are connected to a pump for pumping the wastewater through a pipe provided with a valve at the bottom of each adsorption tower, And the waste water flowing into the adsorption column is purified by the adsorbent and is discharged through the discharge pipe.

In this conventional method, a granular adsorbent is used in order to prevent the adsorbent from being discharged together with the treated water, the flow of the wastewater is not smooth, the pressure drop before and after the adsorption tower is greatly generated, have.

However, when the adsorbent is manufactured into a granular form, it is necessary to prepare the adsorbent in a certain shape by using granular or binder. Therefore, the process of preparing the adsorbent for sewage treatment becomes complicated, and in the regeneration process for reusing the adsorbent, A considerable portion of the formed adsorbent is destroyed, so that a large amount of the adsorbent can not be reused and the sewage treatment cost is increased.

Therefore, it is required to develop a technique for preventing an increase in the sewage treatment cost due to the adsorbent without using the granular adsorbent.

As a conventional prior art in accordance with this demand, Korean Patent No. 10-0236164 (registered 21999.09.29) discloses that the inner space of the adsorption column equipped with the discharge pipe and the adsorbent discharge pipe at the upper and lower ends of one side, And a powder adsorbent inlet pipe connected to the powder adsorbent storage tank is connected to a lower space of the lower space and a waste water inlet pipe is connected to the upper space of the lower space, There is no need to prepare an adsorbent for treating wastewater in a granular form, so that it is easy to manufacture, and the discharge path of the powder adsorbent adsorbing contaminants from the wastewater-treated clean water and the wastewater is different from each other, And it is not necessary to form a uniform shape in the regeneration process for reusing the powder adsorbent, so that it is possible to reuse a large amount of a large amount Discloses a wastewater treatment apparatus capable of using a powder adsorbent.

However, in the prior art, the wastewater flows downward through the wastewater inlet pipe toward the center of the cone portion under the lower space of the adsorption tower, and the adsorbent is supplied independently to the upper end of the lower space through the adsorbent inlet pipe or is injected into the wastewater inlet pipe Since the wastewater and the adsorbent are not sufficiently mixed in the inflow of the wastewater and the adsorbent during the inflow of the wastewater, a stirrer is installed at the central part of the adsorption tower to mix the inflow wastewater with the adsorbent A vortex or a turbulent flow is formed in the lower space of the adsorption tower, and adsorption and precipitation are not smoothly performed.

Therefore, it is required to develop a technique that can smoothly mix the wastewater and the adsorbent, and as a result, adsorption and precipitation can be smoothly carried out, thereby improving sewage treatment efficiency.

Korean Registered Patent No. 10-0236164 (registered on Sep. 21, 9999) "Wastewater Treatment Apparatus Utilizing Powder Adsorbent"

Accordingly, it is an object of the present invention to provide a sewage treatment system that smoothly mixes sewage and an adsorbent, thereby smoothly adsorbing and precipitating pollutants by the adsorbent, thereby forming a sewage treatment efficiency, facilitating backwashing of the filter, And to provide an eco-friendly sewage end treatment plant structure capable of improving the quality of final discharge water.

According to an aspect of the present invention, there is provided an adsorbent comprising: a feed unit for feeding sewage and a powder adsorbent; A mixing unit for mixing the powdery adsorbent with the sewage introduced from the charging unit; A treatment unit in which the mixed sewage and the powder adsorbent are introduced into the mixing unit and the pollutants in the sewage are adsorbed on the powder adsorbent and precipitated; And a backwashing unit that discharges or discharges the treated water discharged from the treatment unit and backwashes the treatment unit periodically, the charging unit including a sewage inlet pipe provided with a sewage inlet valve, And a powder adsorbent inlet pipe connecting the lower end of the powder adsorbent tank and the sewage inlet pipe and provided with a powder adsorbent inlet valve, wherein the mixing section is formed into a cylindrical shape, A mixing tank having an inlet pipe connected to the sewage inlet pipe and an outlet pipe provided at a lower end to discharge sewage and powder adsorbent; a plurality of stirring vanes rotatably installed in the mixing tank; A stirring motor installed on the outside of the tank for rotating the stirring wing, And the ultrasonic vibration device generates ultrasonic vibration. The treatment section includes a treatment tank main body composed of an upper cylindrical part and a lower funnel part, and a treatment tank main body connected to the outflow pipe and passing through the lower end part of the cylindrical part, A processing tube main body provided across the intermediate portion of the cylindrical portion to divide the processing chamber into a primary processing space in the lower portion and a secondary processing space in the upper portion, And a drain pipe connected to a lower end of the funnel portion and connected to one end of the upper portion of the cylindrical portion, and a drain connected to a lower end of the funnel portion, Wherein the injection pipe is provided with a horizontal insertion hole and a vertical insertion hole, The backwashing unit is disposed downstream of the treatment unit, and the discharge pipe passes through one end of the upper end, and the final discharge pipe connected to the discharge pipe passes through the other end. A water storage and backwash pipe connected to the discharge pipe and extending to a lower portion of the water storage tank and provided with a water storage and backwash selection valve in the middle of the discharge water storage tank and a connection pipe between the discharge pipe and the final discharge pipe, And a backwash pump installed at a lower end of the water storage tank and the backwash pipe, wherein the water discharge valve, the powder adsorbent supply valve, the drain valve, the water storage and backwash selection valve, and the three-way Further comprising control means for controlling the valve, the stirring motor, and the backwash pump, wherein the control means includes a normal processing mode, Input unit that inputs and three mode; When the normal processing mode is input to the input unit, an open command for the sewage inlet valve and the powder adsorbent inlet valve, a discharge direction open command for the three-way valve, a closing command for the drain valve, And an operation command for the ultrasonic vibrating device. When the storage mode is input to the input unit, the open command for the sewage inlet valve and the powder adsorbent inlet valve, the reserve opening command for the 3-way valve, And an operation command to the stirring motor, and an operation command to the ultrasonic vibration device, and when the backwash mode is inputted to the input unit, the sewage inlet valve A command to close the powder adsorbent inlet valve, a command to open the backwash direction for the three-way valve and an open command to the drain valve And a control unit for outputting a stop command to the backwash direction selection command for the water storage and backwash selection valves, a stop command for the stirring motor, and a stop command for the ultrasonic vibration apparatus. do.

According to the eco-friendly sewage end treatment plant structure of the present invention, the inflow sewage and the powder adsorbent to be charged are mixed by the mixing means including the stirring vane and the ultrasonic vibration device, and then the injection pipe having the plurality of horizontal direction injection holes and the vertical direction injection holes is formed It is possible to smoothly mix the sewage and the powder adsorbent and to uniformly inject the sewage and the adsorbent throughout the treatment tank body to smoothly perform adsorption and precipitation, By using the treatment mode, the water storage mode and the backwashing mode, the self-treated secondary treatment water is used as backwash water, thereby enabling efficient backwashing and improving the quality of the final discharge water.

FIG. 1 and FIG. 2 show a preferred embodiment of the eco-friendly sewage treatment plant structure according to the present invention,
1 is a general diagram of an eco-friendly sewage end treatment plant structure according to the present embodiment,
FIG. 2 is a functional block diagram showing a control means of the environment friendly simplified sewage end treatment plant structure according to the present embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an eco-friendly sewage treatment plant structure according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 and FIG. 2 show a preferred embodiment of the eco-friendly sewage treatment plant structure according to the present invention.

The eco-friendly sewage treatment plant structure according to the present embodiment includes an input unit 100 for inputting sewage and powder adsorbent; A mixing unit 200 for mixing the powdery adsorbent with the sewage introduced from the charging unit 100; A treatment unit 300 in which the mixed sewage and the powder adsorbent are introduced into the mixing unit 200 and the pollutants in the sewage are adsorbed on the powder adsorbent and precipitated; And a backwashing unit 400 for discharging or storing the discharged and processed water in the processing unit 300 and backwashing the processing unit 300 periodically.

The charging unit 100 includes a sewage inlet pipe 110 provided with a sewage inlet valve 111, a powder adsorbent tank 120 installed at an upper portion of the sewage inlet pipe 110 to store a powder adsorbent, And a powder adsorbent inlet pipe 130 connecting the lower end of the adsorbent tank 120 and the sewage inlet pipe 110 to provide a powder adsorbent inlet valve 131.

The mixing part 200 is formed in a cylindrical shape and has an inlet pipe 211 provided at one side thereof and connected to the sewage inlet pipe 110 and a drain pipe 212 provided at a lower end thereof to discharge sewage and powder adsorbent A plurality of stirring vanes 220 rotatably installed in the mixing tank 210 and an agitating blade 220 installed on the outside of the mixing tank 210 to rotate the stirring vane 220, A motor 230 and an ultrasonic vibrator 240 installed at an upper end of the mixing tank 210 to generate ultrasonic vibrations.

The treatment unit 300 includes a treatment tank main body 310 having an upper cylindrical portion 311 and a lower funnel portion 312 and a lower portion of the cylindrical portion 311 connected to the outflow pipe 212, A charging pipe 320 horizontally installed inside the cylindrical portion 311 and having a plurality of horizontal charging holes 321 and vertical charging holes 322 formed therein; A filtering plate 330 partitioning the processing bath main body 310 into a primary processing space at the lower side and a secondary processing space at the upper side and a wood chip And a discharge pipe 360 connected to one side of the upper end of the cylindrical portion 311. The discharge pipe 360 is connected to the lower end of the funnel portion 312, And a drain pipe (370) connected to the drain valve (371).

Horizontal direction injection holes 321 and vertical direction injection holes 322 are formed in the injection pipe 320. Horizontal direction injection holes 321 and vertical direction injection holes 322 are alternately arranged with respect to the longitudinal direction It is preferable that the mixture of the sewage and the powder adsorbent to be injected is uniformly injected into the entire treatment tank main body 310.

Although a plurality of the inlet pipes 320 are connected to each other at the intermediate portion so that the mixture of the sewage and the powder adsorbent is supplied to the treatment tank main body 310, It is possible to more evenly inject the whole.

The filter plate 330 is made of a member having pores of a size that the filter paper 350 can not pass through.

The backwashing part 400 is installed downstream of the processing part 300 and the final discharge pipe 420 passing through the discharge pipe 360 at one end of the upper part and connected to the discharge pipe 360 passes through the other pipe A water storage and backwash pipe 430 connected to the discharge pipe 360 and extending to a lower portion of the water storage tank 410 and installed with a water storage and backwash selection valve 431, A three-way valve 440 installed at a connection portion between the discharge pipe 360 and the final discharge pipe 420 and the connection between the water discharge pipe and the backwash pipe 430, And a cleaning pump 450.

The three-way valve 440 connects the discharge pipe 360 and the final discharge pipe 420 or connects the discharge pipe 360 and the water storage and backwash pipe 431. The water storage and backwash selection valve 431 is a simple on- (Not shown).

The sewage inflow valve 111, the powder adsorbent inlet valve 131, the drain valve 371, the water storage and backwash selection valve 431 and the three-way valve 440 are all connected to a remote .

The environmentally friendly simple sewage end treatment structure according to the present embodiment includes the sewage inlet valve 111, the powder adsorbent inlet valve 131, the drain valve 371, the water storage and backwash selection valve 431, The control unit 500 for controlling the stirring motor 230 and the backwash pump 450.

The control unit 500 includes an input unit 510 to which a normal processing mode, a water storage mode, and a back washing mode are inputted; When the normal processing mode is input to the input unit 510, an open command for the sewage inlet valve 111 and the powder adsorbent inlet valve 131, a discharge direction open command for the three-way valve 440, a drain valve 371, A closing command for the water storage and backwash selection valve 431 and an operation command for the stirring motor 230 and an operation command for the ultrasonic vibration apparatus 240. When the storage mode is input to the input unit 510 Direction opening command for the three-way valve 440 and a closing command for the drain valve 371 and a command for stopping the water storage and backwashing selection valve < RTI ID = 0.0 > And outputs an operation command to the stirring motor 230 and an operation command to the ultrasonic vibration apparatus 240. When the backwash mode is input to the input unit 510, A closing command for the valve 111 and the powder adsorbent inlet valve 131, A backwash direction opening command for the directional valve 440 and an opening command for the drain valve 371 and a backwash direction opening command for the storage and backwash selection valve 431 and a stop command for the stirring motor 230, And a control unit 520 for outputting a stop command to the ultrasonic vibration apparatus 240.

The closing direction of the water storage and backwash selection valve 431 is a state in which the water storage and backwash pipe 430 is closed and the opening of the water storage and backwash selection valve 431 in the water storage direction is opened to the inside of the water storage tank 410 And the opening of the backwashing selection valve 431 in the backwash direction is a state of connecting the backwashing and backwashing pipe 430 to the backwash pump 450.

The three-way valve 440 is opened in a direction to connect the discharge pipe 360 and the final discharge pipe 420 while the storage water pipe is opened in the discharge pipe 360, 430 are connected to each other.

Hereinafter, the function of the environment friendly simplified sewage end treatment plant structure according to the present embodiment will be described.

When the normal processing mode is input to the input unit 510, the sewage inlet valve 111 and the powder adsorbent inlet valve 131 are opened according to the control command of the control unit 520, and the three-way valve 440 is discharged in the discharge direction The drain valve 371 and the water storage and backwash selection valve 431 are closed and the stirring motor 230 is activated and the ultrasonic vibration Device 240 is activated.

Accordingly, the sewage is introduced through the sewage inlet pipe 110, the powder adsorbent is introduced through the powder adsorbent inlet pipe 130, and the sewage and the powder adsorbent are introduced into the mixing tank 210.

At this time, the stirring motor 230 is operated and the stirring vane 220 is rotated, so that the sewage and the powder adsorbent are mixed and mixed with each other.

Here, the ultrasonic vibration device 240 is operated to generate ultrasonic vibration in the mixing tank 210, so that the inputted sewage and powder adsorbent actively vibrate by ultrasonic vibration, so that the sewage and the powder adsorbent are smoothly mixed.

The mixed sewage and the powder adsorbent are introduced into the treatment tank main body 310 through the inlet pipe 320. At this time, a horizontal insertion hole 321 and a vertical insertion hole 322 are formed in the injection pipe 320, and the horizontal insertion hole 321 and the vertical insertion hole 322 are alternately arranged with respect to the longitudinal direction The mixture of the sewage and the powder adsorbent is uniformly injected into the entire treatment bath main body 310. [ Further, when a plurality of the inlet pipes 320 are connected to each other at the intermediate portion, the mixture of the sewage and the powder adsorbent is uniformly injected into the entire treatment tank main body 310.

When the sewage and the powder adsorbent are put into the treatment tank main body 310, the powder adsorbent is made porous, so that the pollutants in the sewage are adsorbed. The powder adsorbent having a specific gravity smaller than that of water is floated at the initial stage of the introduction of the sewage and the powder adsorbent. However, when the weight of the powder adsorbent increases as the contaminants are adsorbed, the powder adsorbent is precipitated at the lower end of the funnel portion 312 of the treatment tank main body 310, And the primary treatment water becomes equal to the upper layer of the lower primary treatment space.

When the water level of the primary treatment water in the lower primary treatment space rises as the input and treatment process progresses, the primary treatment water is filtered while passing upward through the filter plate 330, and the wood chips 340 and the filtration yarn 350 so that the secondary treatment water becomes equal to the upper layer of the upper secondary treatment space.

The second treated water is discharged through the discharge pipe 360. Since the discharge pipe 360 and the final discharge pipe 420 are connected through the three-way valve 440, they are discharged through the final discharge pipe 420.

When the water storage mode is input to the input unit 510, the sewage inlet valve 111 and the powder adsorbent inlet valve 131 are opened, the drain valve 371 is closed, the stirring motor 230 is operated, The apparatus 240 is operated to perform the same processes as those in the normal processing mode described above, in which the inflow of sewage, the introduction of powder adsorbent, the mixing of the sewage and powder adsorbent, the adsorption and precipitation, and the filtration are performed.

In the water storage mode, the three-way valve 440 connects the discharge pipe 360 and the backwash pipe 430 to each other, that is, connects the discharge pipe 360 and the backwash and backwash pipe 430 And the backwashing selection valve 431 is opened in the direction of opening the water storage tank 410 so that the secondary treatment water discharged through the discharge pipe 360 is discharged to the final discharge pipe 420 And is stored in the water storage tank 410 through the water discharge pipe 360 and the backwash pipe 430.

At this time, a water level sensor (not shown) is installed in the water reservoir 410, and when the water level in the water reservoir 410 reaches the set water level, the control unit 520 can stop the water storage mode and switch it back to the normal processing mode.

When the backwash mode is input to the input unit 510, the sewage inlet valve 111 and the powder adsorbent inlet valve 131 are closed, the stirring motor 230 is stopped, the ultrasonic vibrator 240 is stopped, The directional valve 440 is opened in the backwash direction, i.e., the direction connecting the outlet pipe 360 and the backwash and backwash pipe 430, and the backwash and backwash selection valve 431 is opened in the backwash direction, Is opened in a direction connecting the backwash pipe (430) and the backwash pump (450), and the drain valve (371) is opened.

Accordingly, the sewage and powder adsorbent are stopped, the mixing and treatment of the sewage and the powder adsorbent are stopped, the secondary treatment water stored in the water storage tank 410, the backwash pump 450, the water storage and backwash selection valve 431, And is supplied to the upper portion of the secondary treatment space above the treatment bath main body 310 through the backwash pipe 430, the three-way valve 440, and the discharge pipe 360.

The secondary treated water (backwash water) supplied to the upper secondary treatment space of the treatment bath main body 310 passes through the filter paper 350 while passing downward through the filter paper 350, the wood chip 340 and the filter plate 330, The wood chip 340 and the filtering plate 330 are removed and introduced into the primary treatment space under the treatment bath main body 310. At this time, since the drain valve 371 is opened, (Backwash water) remaining in the lower primary treatment space of the treatment tank main body 310 and the powder adsorbent are discharged together with the drainage water, which is separated from the wood chip 350, the wood chip 340 and the filter plate 330, And then drained through the pipe 370 to be backwashed.

As described above, according to the eco-friendly sewage treatment plant structure according to the present embodiment, the incoming sewage and the powdery adsorbent to be charged are mixed by the mixing means having the stirring vane and the ultrasonic vibration device, and then, Since the wastewater is fed into the lower primary treatment space of the treatment tank body through the inlet pipe formed with the direction injection hole, the sewage and the powder adsorbent are mixed smoothly, and the water is uniformly injected throughout the treatment tank body, And by using the normal treatment mode, the water storage mode and the backwashing mode, the self-treated secondary treatment water is used as the backwash water, so that efficient backwashing is possible and the quality of the final discharge water can be improved.

In addition, since it is not necessary to produce an adsorbent in a granular form, its production is easy, the discharge path of the powder adsorbent adsorbing contaminants from the wastewater-treated clean water and the wastewater is different from each other, so that the flow of the wastewater treatment is smooth, It is not necessary to shape the film in a predetermined shape in the regeneration process to be able to reuse a large number of large quantities.

Further, the powder adsorbent in the treatment section can be recovered through the drain valve and the drain pipe and recycled.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or essential characteristics thereof. Therefore, the embodiments disclosed in the present invention are not intended to limit the scope of the present invention but to limit the scope of the technical idea of the present invention. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: input unit 110: sewage inflow pipe
111: sewage inflow valve 120: adsorption tank
130: Powder adsorbent inlet pipe 131: Powder adsorbent inlet valve
200: mixing section 210: mixing tank
220: stirring wing 230: stirring motor
240: ultrasonic vibration device 300:
310: Treatment tank main body 320:
321, 322: input hole 330: filtration plate
340: Wood Chip 350: Filter
360: discharge pipe 370: drain pipe
371: drain valve 400: backwash section
410: Reservoir 420: Final discharge pipe
430: Reservoir and backwash pipe 431: Reservoir and backwash selection valve
440: Three way valve 450: Backwash pump

Claims (1)

An input unit 100 for inputting sewage and powder adsorbent; A mixing unit 200 for mixing the powdery adsorbent with the sewage introduced from the charging unit 100; A treatment unit 300 in which the mixed sewage and the powder adsorbent are introduced into the mixing unit 200 and the pollutants in the sewage are adsorbed on the powder adsorbent and precipitated; And a backwashing unit 400 for discharging or storing the discharged and processed water in the processing unit 300 and periodically backwashing the processing unit 300,
The charging unit 100 includes a sewage inlet pipe 110 provided with a sewage inlet valve 111, a powder adsorbent tank 120 installed at an upper portion of the sewage inlet pipe 110 to store a powder adsorbent, And a powder adsorbent inlet pipe (130) connecting the lower end of the adsorbent tank (120) to the sewage inlet pipe (110) and providing a powder adsorbent inlet valve (131)
The mixing part 200 is formed in a cylindrical shape and has an inlet pipe 211 provided at one side thereof and connected to the sewage inlet pipe 110 and a drain pipe 212 provided at a lower end thereof to discharge sewage and powder adsorbent A plurality of stirring vanes 220 rotatably installed in the mixing tank 210 and an agitating blade 220 installed on the outside of the mixing tank 210 to rotate the stirring vane 220, A motor 230 and an ultrasonic vibrator 240 installed at an upper end of the mixing tank 210 to generate ultrasonic vibration,
The treatment unit 300 includes a treatment tank main body 310 having an upper cylindrical portion 311 and a lower funnel portion 312 and a lower portion of the cylindrical portion 311 connected to the outflow pipe 212, A charging pipe 320 horizontally installed inside the cylindrical portion 311 and having a plurality of horizontal charging holes 321 and vertical charging holes 322 formed therein; A filtering plate 330 partitioning the processing bath main body 310 into a primary processing space at the lower side and a secondary processing space at the upper side and a wood chip And a discharge pipe 360 connected to one side of the upper end of the cylindrical portion 311. The discharge pipe 360 is connected to the lower end of the funnel portion 312, And a drain pipe (370) connected to the drain valve (371)
Horizontal direction injection holes 321 and vertical direction injection holes 322 are formed in the injection pipe 320. Horizontal direction injection holes 321 and vertical direction injection holes 322 are alternately arranged with respect to the longitudinal direction Lt; / RTI &
The backwashing part 400 is installed downstream of the processing part 300 and the final discharge pipe 420 passing through the discharge pipe 360 at one end of the upper part and connected to the discharge pipe 360 passes through the other pipe A water storage and backwash pipe 430 connected to the discharge pipe 360 and extending to a lower portion of the water storage tank 410 and installed with a water storage and backwash selection valve 431, A three-way valve 440 installed at a connection portion between the discharge pipe 360 and the final discharge pipe 420 and the connection between the water discharge pipe and the backwash pipe 430, A cleaning pump 450,
The water suction valve 131, the drain valve 371, the water storage and backwash selection valve 431 and the three-way valve 440, the stirring motor 230, Further comprising control means (500) for controlling the pump (450)
The control unit 500 includes an input unit 510 to which a normal processing mode, a water storage mode, and a back washing mode are inputted; When the normal processing mode is input to the input unit 510, an open command for the sewage inlet valve 111 and the powder adsorbent inlet valve 131, a discharge direction open command for the three-way valve 440, a drain valve 371, A closing command for the water storage and backwash selection valve 431 and an operation command for the stirring motor 230 and an operation command for the ultrasonic vibration apparatus 240. When the storage mode is input to the input unit 510 Direction opening command for the three-way valve 440 and a closing command for the drain valve 371 and a command for stopping the water storage and backwashing selection valve < RTI ID = 0.0 > And outputs an operation command to the stirring motor 230 and an operation command to the ultrasonic vibration apparatus 240. When the backwash mode is input to the input unit 510, A closing command for the valve 111 and the powder adsorbent inlet valve 131, A backwash direction opening command for the directional valve 440 and an opening command for the drain valve 371 and a backwash direction opening command for the storage and backwash selection valve 431 and a stop command for the stirring motor 230, And a control unit (520) for outputting a stop command to the ultrasonic vibration device (240).

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