KR101758049B1 - Hybrid water treatment apparatus removable nitrogen and phosphorus by floatation and consecutive filtration - Google Patents

Abstract

The present invention relates to an air conditioning system, A pH reactor in which a neutralizing agent is added to the fluid, the pH is adjusted by stirring with a stirrer, the air is oxidized through the acid ore and the nitrogen is removed by ammonia dissociation; A rapid reaction tank in which a flocculant is added, stirred with a stirrer, subjected to rapid mixing reaction, and flocculated with fine flocs; A coagulation tank in which a coagulant is added and stirring is performed with a stirrer to mix and react with the grown floc; The sedimentation and floatation are solid-liquid separation, and the separated water of solid-liquid separation is filtered through a filter and introduced into a filtration water storage tank, and a floatation filter installed with a water level meter; A bubble supplying unit for supplying the pressurized water containing compressed air to the floating filtration tank through a pressurized water discharge pipe provided with an automatic pressure regulator to generate minute bubbles to float the floating material into the floating space; A sludge storage tank in which the floating sludge removed by the floating sludge remover flows in and stored; A filtered water storage tank in which solid-liquid separation and filtered water from the floating filter tank are introduced and stored; A backwashing unit for backwashing the filtered water with a filter to remove foreign substances occluded in the filter by backwashing; A flow-out tank through which filtered water flows and flows out through an outflow pipe; And a controller for controlling the operation of the apparatus, wherein a filtration and a backwashing process are alternately performed to simultaneously remove nitrogen and phosphorus which are controlled so that continuous filtration is possible.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a flotation treatment system for flotation and continuous filtration, which simultaneously removes nitrogen and phosphorus.

The present invention relates to a water treatment apparatus, and more particularly, to an apparatus and a method for simultaneously treating flotation and continuous filtration in a single apparatus, thereby reducing the size and volume of the apparatus, increasing the treatment efficiency for influent water, The present invention relates to a flotation and continuous filtration type water treatment apparatus capable of simultaneously removing phosphorus and phosphorus.

The sewage treatment plant is designed and constructed to handle the daily sewage discharged from the city. In general sewage treatment, the sewage introduced through the sewage pipe is first treated through sedimentation or floatation, and then the anaerobic tank, anoxic tank, Biological treatment is performed using a microorganism in a microorganism reaction tank composed of an aerobic tank, and then sedimentation is carried out again in a secondary settling tank, and finally treated water is discharged through a total phosphorus treatment by floatation separation, sedimentation, filtration and the like.

In the sewage treatment process, the sludge concentration tank, the digester, the dehydrator, the filter, and the like generate a counter current, and relatively high concentration of counter current such as the dehydrated filtrate discharged from the dehydrator, the backwash water backwashed by the filter, .

Although the influent amount is less than 1 to 5% of the total sewage inflow, the inflow concentration is 10 to 30 times higher than the total sewage inflow concentration, which increases the inflow load. In recent years, the sewage sludge energy self- As the installation of digester is increasing, it is expected that the number of rebound due to the installation of digester will continue to increase.

There are sedimentation method and floatation separation method for treating sewage and reflux water. Here, the sedimentation method is for sedimentation of a solid suspended material (SS) contained in sewage and recirculated water and removal by solid-liquid separation, and the removal rate is determined by the settling velocity of the particles and the residence time according to the specific gravity of the suspended material , And a typical residence time is 2 to 4 hours.

Recently, a sloped sedimentation basin has been used in which a slope plate is installed on the sedimentation part of the sedimentation basin to increase the sedimentation area and reduce the residence time. The sedimentation time of the slope sedimentation basin is designed to be 1 to 1.5 hours, However, there is a problem that the removal rate is somewhat low, the internal structure is complicated, and maintenance is difficult. As a result, floatation and recirculation water are applied mainly by the floating separation method, so that the residence time is shortened and the site area is reduced.

FIG. 1 is a view showing a sewage treatment apparatus, which is a general physicochemical treatment facility. The sewage treatment apparatus includes an inlet tank 10 through which sewage flows into a sewage pipe, a reaction tank 20 through which a coagulant is introduced, ), A coagulation tank (30) which is filled with a flocculant and agitated by the flocculation agitator (31) to flocculate the floc, and a float sludge collector (41) A sedimentation tank 40 for discharging and discharging the discharge pump 42, and an outflow tank 50 for storing and discharging the treated water.

In addition, Patent Document 1 discloses a microbial reaction tank including a primary settling tank for introducing sewage and causing precipitation, an aerobic tank for nitrifying the effluent of the primary settling tank using microorganisms, and a secondary tank for precipitating the microbial sludge in the microbial reaction tank. A denitrification tank for receiving the effluent of the second settling tank, a denitrification tank for denitrification through an internal carrier, and an denitrification filtration tank for removing suspended solids contained in the effluent of the denitrification tank through an inner filter and removing residual nitrate of the effluent, There is disclosed a sewage treatment apparatus and a sewage treatment method using the sewage treatment apparatus for reducing environmental pollution by reducing the nitrogen content of the final effluent at the time of treatment.

In addition, Patent Document 2 discloses a bioreactor for treating inflow sewage by a biological reaction and a denitrification process which is installed on the discharge side of the bioreactor and introduces treated water during aeration to deposit a sludge having a high concentration, (BOD) and suspended solids (SS), which are included in the treated water flowing from the reaction tank, from the reaction type precipitation means for subjecting the sludge having low concentration to inducing the upflow and re- There is disclosed a high-efficiency sewage and wastewater treatment apparatus using a reaction-type sedimentation apparatus including a secondary settler provided with means for sedimenting and removing a part of treated water and returning a part of the treated water to the bioreactor.

However, the sedimentation tanks included in the above-described conventional techniques are poor in treatment efficiency due to solid-liquid separation due to gravity settling, and it is difficult to cope with load fluctuation and toxic substance inflow, increase the size and volume of the construction site area, Due to the large size of the device, the operation cost is high and there is a problem that many experts are needed. In addition, the floating separator included in the above-described conventional techniques has a problem that the concentration of the treated water is not significantly reduced because the filtration efficiency of the separated water is poor due to the low efficiency of removal of fine floating materials and nitrogen.

Korean Registered Patent No. 10-0783789 (issued October 10, 2007) Korean Patent Publication No. 10-2006-0024288 (published on March 16, 2006)

SUMMARY OF THE INVENTION The present invention has been conceived to solve all of the problems described above, and it is an object of the present invention to solve the above-mentioned problems and to provide an apparatus and a method for simultaneously processing floating and continuous filtration in a single apparatus, reducing the size and volume of the apparatus, reducing unnecessary power, It is possible to remove nitrogen and phosphorus simultaneously with the influent concentration and to cope with the fluctuation and toxic substance inflow. Also, it is possible to remove both nitrogen and phosphorus which can increase the utilization of pretreatment process or other process composition. The object of the present invention is to provide a water treatment apparatus.

According to an aspect of the present invention, there is provided an inflow pump comprising: an inflow portion having an inflow pipe through which a fluid to be water-treated flows; The neutralizing agent is added to the fluid introduced from the inlet, and the pH is adjusted by stirring with an agitator. The air supplied from the air blower installed at the outside is generated through the air diffuser provided at the lower part to dissipate the ammonia contained in the fluid, PH; A rapid reaction tank in which a flocculant is added to a fluid introduced from the pH reactor and stirred with a stirrer to rapidly mix and react with each other to form fine flocs; An agglomeration tank in which a flocculant is injected into a fluid containing flocs introduced from the rapid reaction tank and agitated by a stirrer to mix and react with the floc; After the fluid containing the flocculated flocculant in the flocculation tank flows, sedimentation and floatation are carried out to separate the solid-liquid separated liquid. The separated liquid of solid-liquid separation is filtered through a filter installed in the lower part, And a plurality of sintered mesh filter tubes each having a mesh size different from that of the sintered mesh filter and joined to each other through a sintering and heat treatment process, The filter tube is a flotation filtration tank divided into first and second groups; A bubble supplying unit for supplying pressurized water containing compressed air to the floating filtration tank through a pressurized water discharge pipe provided with an automatic pressure regulator to generate minute bubbles to float the floating material into the floating space; A sludge storage tank in which the floating sludge removed by the floating sludge remover flows in and stored; A filtered water storage tank in which solid-liquid separation and filtered water from the flotation filtration tank is introduced and stored; A backwashing unit connected to the filtered water storage tank and backwashing the filtered water with the filter to remove foreign matter clogged by the filter by backwashing; A drain tank through which filtered water flows from the filtered water storage tank and flows out through an outflow pipe; And a control unit for controlling the operation of the apparatus. When the measured value measured by the level meter and transmitted to the control unit exceeds a reference value, the control unit controls the sintered mesh filter tube of the first set and the sintered mesh filter tube of the second set Wherein the filtration step and the backwashing step are alternately performed so that continuous filtration is possible. The present invention also provides a flotation and continuous filtration type water treatment apparatus for simultaneously removing nitrogen and phosphorus.

The inlet unit of the present invention may include an inlet pipe, an inlet flow meter for measuring an inflow amount of the fluid flowing into the pH reactor through the inlet pipe, and transmitting the measured value to the control unit, And an inflow TP meter for measuring the total concentration of the fluid and transmitting the measured value to the controller.

In addition, the flocculation tank of the present invention is provided with a pH meter. The pH meter measures the pH of the fluid and sends the measured value to the control unit. The control unit determines whether the pH is increased or decreased according to the measured value, can do.

The floatation filtration tank of the present invention may further include a floatation sludge remover disposed at an upper portion of the floatation filtration tank to remove floatation sludge collected in the floatation space and to guide suspended matter having minute bubbles, The fluid direction change induction plate is formed so as to be inclined toward the rear upper side and the micro bubble jet nozzles are provided at the front and rear lower portions of the fluid direction change induction plate so that the primary and secondary lifting can be performed.

Further, in the present invention, the filtered water outlet pipe and the pressurized water discharge pipe are connected to each other through a micro-bubble inflow pipe provided with a micro-bubble automatic valve, and the back-washing unit is connected between the filtered water storage bath and the micro- A backwash pump installed in the backwash pipe for backwashing the filtered water stored in the filtration water storage tank and a backwashing automatic opening / closing valve for opening / closing the flow of filtered water backwashed in the backwash pipe, And the backwashing section is provided with the pressurized water in which compressed air is saturated in the state where the filtered water automatic valve is closed and the backwash automatic valve and the microbubbles automatic valve are opened and the backwash water supplied through the backwash pipe 810 The sintered mesh filter tube is backwashed by the filter to remove the foreign matter clogged with the sintered mesh filter tube and then floated up by fine bubbles .

Further, the bubble supplying unit of the present invention pressurizes a part of the filtered water stored in the filtered water storage tank with a pressurized water pump to generate pressurized water, flows into the air dissolution reactor through a pressurized pipe connected to the filtered water storage tank, And the air dissolution reactor reacts with the pressurized water and the compressed air to generate pressurized water containing compressed air.

Further, in the present invention, the filtrate water storage tank is provided with a water level adjusting device, and the filtered water stored by the operation of the water level adjusting device can be flowed into the outflow tank.

The outflow tank of the present invention may further comprise an outflow pipe, an outflow meter for measuring the outflow amount of the fluid flowing out through the outflow pipe and transmitting the measured value to the control unit, And an outflow TP meter for measuring a total concentration of the fluid stored in the outflow tank and transmitting the measurement value to the control unit.

According to the present invention, it is possible to reduce the size and volume of the apparatus, reduce unnecessary power, increase the treatment efficiency, cope with the instantaneous load fluctuation and the inflow of the toxic substance quickly by treating the float and the continuous filtration simultaneously in one apparatus , It is possible to simultaneously remove nitrogen and phosphorus according to the influent concentration, and it has an effect that it can be utilized for the pretreatment process and other process configurations.

Further, according to the present invention, a sintered mesh filter tube is used as a filter in a flotation filtration tank, which is excellent in corrosion resistance, high pressure resistance, high viscosity filtration, and excellent regeneration efficiency.

1 is a view showing a sewage treatment apparatus which is a general physicochemical treatment facility.
FIG. 2 is a view showing a configuration of a flotation and continuous filtration type water treatment apparatus according to an embodiment of the present invention.
3 is a plan view showing the configuration of the reverse detail for continuous filtration according to an embodiment of the present invention.
FIG. 4 is a view showing a flow of a fluid in a filtration and backwashing process according to an embodiment of the present invention. FIG. 4 (a) shows a backwashing process and FIG. 4 (b) shows a filtration process.
FIG. 5 is a block diagram illustrating a control unit of a combined water and continuous filtration type water treatment apparatus according to an embodiment of the present invention. Referring to FIG.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings, with reference to the accompanying drawings, wherein like reference numerals refer to like elements throughout.

According to the present invention, the floatation and continuous filtration type water treatment apparatus for simultaneously removing nitrogen and phosphorus simultaneously treats floatation and continuous filtration in one apparatus to reduce the size and volume of the apparatus, And it is possible to remove nitrogen and phosphorus simultaneously according to the influent concentration.

2, the present invention includes an inlet 100, a pH reactor 200, a rapid reaction vessel 300, an aggregation vessel 400, a floatation filtration vessel 500, a bubble supplying unit 600, a sludge storage vessel 710, a filtrate storage tank 720, an outflow tank 730, a backwashing unit 800, and a control unit 800 receiving signals transmitted from the respective units and controlling operations of the respective units accordingly.

The inflow section 100 receives sewage that has passed through a sewer line, fluid that has been generated during the sewage treatment process and has been rebounded.

The inlet unit 100 includes an inlet pipe 110 through which the fluid flows and an inlet flow meter 120, an inlet SS concentration meter 130, an inlet TP meter 140, Respectively. The influent flow meter 120 measures an inflow amount of fluid flowing into the pH reactor 200 through the inflow pipe 110 and the inflow SS concentration meter 130 measures the concentration of suspended solids , And the influent TP meter 140 measures the total phosphorus (TP) concentration of the fluid. The influent flow meter 120, the influent SS concentration meter 130 and the influent TP meter 140 transmit respective measurement values to the control unit 900. The control unit 900 receives the measured values The operation of the stirrers 210, 310 and 410, the air blower 220, the floating sludge remover 510, the pressurized water pump 630 and the like to be described later are proportionally controlled according to the size of the operation.

In the pH reactor 200, a neutralizing agent such as calcium hydroxide and caustic soda is added to the fluid introduced from the inlet 100, the pH is adjusted by stirring with the stirrer 210, and the pH of the air blower 220 The supplied air is generated through the air diffuser 230 installed at the lower part to convert ammonium ions contained in the fluid into ammonia. The ammonia is dissipated into a gaseous state to remove nitrogen, and a pH meter 240 is installed, the pH of the fluid introduced into the pH reactor 200 is measured.

When the pH meter 240 measures the pH of the fluid flowing into the pH reactor 200 and transmits the measured pH value to the controller 900, The pH of the fluid is elevated to 11 to 12 in proportion to the amount of the neutralizer introduced into the pH reactor 200 and the operation of the stirrer 210 and the air blower 220 according to the size thereof, Min, the ammonia contained in the fluid is dissipated to remove nitrogen. This removes more than 50% of the ammonia contained in the fluid, depending on the water temperature.

The rapid reaction tank 300 is charged with an inorganic coagulant such as sulfuric acid and ALUM into the fluid introduced from the pH reactor 200 and is agitated by a stirrer 310 to rapidly mix and react to form fine flocs. At this time, the inorganic phosphate included in the fluid reacts with the inorganic coagulant to cause coagulation reaction, and then the phosphor is finally removed through the flocculation tank 400 and the floating filtration tank 500.

For example, in the phosphorus removal process described above, reactions of Al ₂ (SO ₄ ) ₃ + 2PO ₄ ^3- → 2AlPO ₄ ↓ + 3SO ₄ ^2- and FeCl ₃ + PO ₄ ^3- → FePO ₄ ↓ + 3Cl ^- have. And has a removal rate of about 80% or more on a total phosphorus (TP) basis.

The coagulation tank 400 is filled with a flocculant such as a polymer into the fluid containing the flocs flowing in the rapid reaction tank 300, stirred with a stirrer 410,

At this time, a pH meter 420 is installed in the flocculation tank, and the pH meter measures the pH of the fluid and sends the measured value to the controller 900. The controller 900 controls the pH Judge, alarm or perform subsequent processing. For example, when the pH of the inflow water is rapidly increased or rapidly increased, it is determined that a toxic substance has been introduced, and the subsequent treatment such as neutralization can be performed quickly.

In addition, the controller 900 can proportionally control the amount of the coagulant supplied to the rapid reaction tank 300 according to the measured value of the pH meter 420.

The flotation filtration tank 500 is formed of flotation and continuous filtration in a single tank. After flotation fluid flows in the flocculation tank 400, sedimentation and flotation are carried out to separate the flotation fluid, The filtrate is introduced into the filtrate storage tank 720 through a filtrate outlet pipe 550 having a filtrate water automatic valve 551. The filtered water is introduced into the filtrate storage tank 720 through the filter 530 installed in the flotation filtration tank 500 And a water level measuring instrument 540 are installed to measure the inside water level, and transmit the measured water level value to the controller 900.

The floatation filtration tank 500 is formed with a sedimentation zone D in which a flocculation precipitate is formed on the lower side of the filter 530 and a floatation space Z in which a suspended material floats upward to form a floatation zone Z is formed, Separated water separated by solid-liquid separation is accommodated in a separation water zone C between the zone D and the floating space Z. A filter 530 is installed under the separation water zone C to filter the separated water, And then discharged to the filtered water storage tank 720 through the filter 550.

The floatation filtration tank 500 is provided with a floating sludge remover 510 for removing floatation sludge collected in the floatation space Z by floatation of suspended solids by fine bubbles in the rear upper part, The fluid direction change induction plate 520 is formed to be inclined toward the rear upper side for guiding the suspended material having fine bubbles injected from the fluid direction change induction plate 520 to the floating space Z, The tilting angle gradually becomes gradually from the steep slope to the mild slope so that the floating material can be moved backward without falling down directly, and the float is guided to the sedimentation area D in the rear lower part, To the floating space (Z) while guiding the suspended material in the floating space (Z). Here, a sedimentation zone may be formed on the lower side of the fluid direction change-over guide plate 520.

The floatation sludge floated rapidly in the floatation space Z by the floatation force of the minute bubbles and the stepwise induction of the fluid direction conversion plate 450 is removed by the floatation sludge remover 510 provided at the upper part, The sludge storage tank 710 of FIG.

The front portion of the fluid direction change induction plate 520 is formed in a narrow region and the rear portion thereof is formed in a wide region. The fine bubble jetting nozzles 670 are disposed at the front and rear lower portions of the fluid direction change- And the micro-bubble injection nozzle 670 generates micro-bubbles at the bottom of the floatation filtration tank 500 to float the floating material into the floating space Z.

That is, when the fluid containing the flocculated flocculant in the flocculation tank 400 flows through the lower portion of the floe filtration tank 500, the pressure of the inflow water and the pressure of the microbubbles The suspended material is firstly lifted up and guided to the rear upper side promptly by the guidance of the fluid direction changeover guide plate 520 in the narrow region due to the injection of the fine bubbles by the pressurized water of the injection nozzle 670, The floating material which has not yet been lifted up during the first float by the minute bubbles injected from the minute bubble jetting nozzles 670 provided on the rear side of the switching guide plate 520 is further lifted into the floating space Z, So that the floc is gradually settled into the lower sedimentation zone (D) and solid-liquid separation is carried out.

In addition, the filter 530 is composed of a plurality of sintered mesh filter tubes in which several layers of stainless mesh having different mesh sizes are combined so as not to be separated from each other through a sintering and heat treatment process. A sintered mesh filter tube 531 and a plurality of second sintered mesh filter tubes 532 can be separately controlled. Such a sintered mesh filter tube has excellent corrosion resistance, high internal pressure, high viscosity filtration, and excellent regeneration efficiency, thereby enabling stable filtration.

The bubble supplying unit 600 supplies the pressurized water containing compressed air to the upper side of the floating filtration tank 500 through the bottom of the floating filtration tank 500 through the pressurized water discharge pipe 660 equipped with the automatic pressure regulator 661, So that the floating material can float into the floating space (Z).

The bubble supplying unit 600 may pressurize a part of the filtered water stored in the filtered water storage tank 720 with a pressurized water pump 630 to generate pressurized water and pressurize the pressurized water stored in the pressurized water pipe 720 connected to the filtered water storage tank 720 620 into the air dissolution reactor 610 and the compressed air compressed by the air compressor 640 is introduced into the air dissolution reactor 610 through the air piping 650.

The air dissolution reactor 610 reacts pressurized water with compressed air to generate pressurized water containing compressed air. The pressurized water in which the compressed air is saturated in the air dissolution reactor 610 is supplied to the pressurized water discharge pipe The pressure of the pressurized water saturated with the compressed air is maintained at a pressure in the range of 4.8-5.2 kgf / & squ & by the automatic pressure regulator 661 installed on the pressurized water discharge pipe 660, The fine bubbles are injected upward from the inner bottom of the floatation filtration tank 500 while the pressure is lowered near the atmospheric pressure by being injected through the nozzle 670. The fine bubbles injected through the fine bubble jetting nozzle 670 are injected toward the upper side to adhere to the floating material to lighten the weight of the floating material and provide a levitation force, ), And is collected into floating sludge.

The filtered water outflow pipe 550 and the pressurized water discharge pipe 660 are connected to each other through a fine bubble inflow pipe 680 provided with a minute bubble automatic valve 681 to supply pressurized water saturated with compressed air, The microbubbles are generated while being blown toward the filter 530, and the foreign substances filtered by the filter 530 are lifted upward to be collected in the floating space Z.

The sludge storage tank 710 is removed by the floating sludge remover 510, and the floating sludge that has been overflowed flows and is stored.

The filtered water storage tank 720 is connected to the water level regulating device 721 by the water level control device 721. The water level regulating device 721 is installed in the filtrate storage tank 550, The filtered water is flowed over and flows into the outflow tank.

The effluent tank 730 flows filtered water from the filtrate storage tank 720. The outflow tank 730 has an outflow pipe 731 for discharging filtered water and an outflow meter 732, an outflow SS concentration meter 733, an outflow TP meter 734, Respectively.

The outflow meter 732 measures the outflow amount of the process water flowing out through the outflow pipe 731. The outflow SS concentration meter 733 measures the concentration of suspended solids (SS) in the process water, The meter 734 measures the total phosphorus (TP) concentration of the treated water. At this time, the outflow meter 732, the outflow SS concentration meter 733, and the outflow TP meter 734 transmit respective measured values to the controller 900, and the controller 900 calculates each measured value The water quality of the treated water can be constantly monitored and monitored. When the quality of the treated water is lowered, the stirring of the PH reaction tank 200, the rapid reaction tank 300, the flocculation tank 400, , The dosage of the drug, and the amount of minute bubbles generated, thereby increasing the treatment efficiency.

The backwashing unit 800 is connected to the filtering water storage tank 720 and backwashes the filtered water with the filter 530 to remove the foreign substances clogged by the filter 530 by backwashing.

3 and 4, the backwashing section 800 is connected to the backwash pipe 810 between the filtration water storage tank 720 and the microbubble inflow pipe 680, A part of filtered water stored in the filtered water storage tank 720 is backwashed to the pipe 810 and is supplied to the filter 530 through the filtered water outflow pipe 550. The backwash pipe 810 is provided with a filter A backwash automatic valve 830 for opening and closing the flow of filtered water backwashing the washing pump 820 is installed.

In addition, the backwashing unit 800 operates the backwash pump 820 in a state where the filtered water automatic valve 551 is closed and the backwash automatic valve 830 and the microbubble automatic valve 681 are opened The pressurized water saturated with the compressed air and the backwash water are backwashed by the filter 530 to remove the foreign substances occluded in the sintered mesh filter tube and the separated foreign matter is lifted up by the minute bubbles into the upper floating space Z Is removed by the floating sludge remover (510).

That is, in the flotation filtration tank 500, the backwashing process is performed on the filter 530, and the filtration is simultaneously performed while continuous filtration is performed. The continuous filtration is performed by the level meter 540, If the measured value exceeds the reference value, the controller 900 alternately performs the filtration process and the backwash process alternately on the sintered mesh filter tube 531 of the first tier and the sintered mesh filter tube 532 of the second tier So that continuous filtration can be performed.

For example, referring to FIG. 3, the sintered mesh filter tube 531 and the sintered mesh filter tube 532 of the first set and the sintered mesh filter tube 532 of the first set are spaced apart from each other, The filtration water outlet pipe 550 is connected to the filtration water storage tank 720 and each filtration water discharge pipe 550 is provided with a filtration water automatic valve 551 and the microbubble inflow pipe 680 and the backwash pipe 810 are connected to each other so that the filtration process and the backwash process for the first sintered mesh filter tube 531 and the second sintered mesh filter tube 532 can be alternately performed will be.

Referring to FIG. 4, the continuous filtration process will be described in more detail. As shown in FIG. 4 (a), the sintered mesh filter tube 531 of the first set is subjected to a backwash process, The pressure regulator 661 is closed and the backwash pump 820 is operated and the backwash automatic valve 830 and the microbubbles automatic valve 681 are opened, The sludge is supplied to the sintered mesh filter tube 531 to remove the foreign matter clogged by the sintered mesh filter tube 531 of the first trough. Is removed by the remover (510), and the heavy one of the removed foreign matters is settled to the settling zone (D).

At the same time, the filtering process of the sintered mesh filter tube 532 of the second set is continued as shown in Fig. 4 (b), at which time the filtered water automatic valve 551 and the automatic pressure regulator 661 are opened, The pump 820 stops operating and the filtered water filtered in the sintered mesh filter tube 532 of the second set is returned to the filtered water outlet pipe 550 while the backwash automatic valve 830 and the microbubble automatic valve 681 are closed, And then flows into the filtrate storage tank 720.

Next, the backwashing process and the filtration process for the sintered mesh filter tube 531 of the first set and the sintered mesh filter tube 532 of the second set are exchanged with each other, so that the sintered mesh filter tube 531 The filtration process is continued and the sintered mesh filter tube 532 of the second set is subjected to a backwash process.

As a result, the floatation and continuous filtration combined type water treatment apparatus for simultaneously removing nitrogen and phosphorus according to the present invention can reduce the size and volume of the apparatus, reduce unnecessary power, The treatment efficiency can be increased, instantaneous load fluctuation and toxic substance inflow can be coped with quickly, nitrogen and phosphorus can be removed simultaneously according to the concentration of the inflow, the utilization for the pretreatment process or other process configuration can be enhanced, By using a sintered mesh filter tube as a filter, it is possible to perform stable filtration because of excellent corrosion resistance, high pressure resistance, high viscosity filtration, and excellent regeneration efficiency.

The present invention is not limited to the above-described embodiments. Anything having substantially the same constitution as the technical idea described in the claims of the present invention and achieving the same operational effect is included in the technical scope of the present invention.

100. Inflow section 110. Inflow pipe
120. Inlet flow meter 130. Inlet SS concentration meter
140. Inlet TP meter 200. pH reactor
210. Stirrer 220. Air blower
230. Acoustic engine 240. pH meter
300. Rapid reaction tank 310. Stirrer
400. Flocculation tank 410. Stirrer
420. pH meter 500. Floating filtration tank
510. Floating sludge remover 520. Fluid direction switching plate
530. Filter 531. The sintered mesh filter tube
532. Sintered mesh filter tube of Article 2 540. Level gauge
550. Filtered water outlet pipe 551. Filtered water automatic valve
600. Bubble supplying part 610. Air dissolving reactor
Pressurized piping 630. Pressurized water pump
640. Air compressor 650. Air piping
660. Pressurized water discharge piping 661. Automatic pressure regulator
670. Micro-bubble injection nozzle 680. Micro-bubble introduction pipe
681. Micro bubble automatic valve 710. Sludge reservoir
720. Filtration water storage tank 721. Level control system
730. Spillway 731. Spillway
732. Spill flow meter 733. Spill SS concentration meter
734. Runoff TP meter 800. Backwash section
810. Backwash piping 820. Backwash pump
833. Backwash automatic valve 900. Control
C. Separation zone D. Deposition zone Z. Injury space

Claims (8)

An inflow portion having an inflow pipe through which a fluid to be water-treated flows;
The neutralizing agent is added to the fluid introduced from the inlet, and the pH is adjusted by stirring with an agitator. The air supplied from the air blower installed at the outside is generated through the air diffuser provided at the lower part to dissipate the ammonia contained in the fluid, PH;
A rapid reaction tank in which a flocculant is added to a fluid introduced from the pH reactor and stirred with a stirrer to rapidly mix and react with each other to form fine flocs;
An agglomeration tank in which a flocculant is injected into a fluid containing flocs introduced from the rapid reaction tank and agitated by a stirrer to mix and react with the floc;
After the fluid containing the flocculated flocculant in the flocculation tank flows, sedimentation and floatation are carried out to separate the solid-liquid separated liquid. The separated liquid of solid-liquid separation is filtered through a filter installed in the lower part, And a plurality of sintered mesh filter tubes each having a mesh size different from that of the sintered mesh filter and joined to each other through a sintering and heat treatment process, The filter tube is a flotation filtration tank divided into first and second groups;
A bubble supplying unit for supplying pressurized water containing compressed air to the floating filtration tank through a pressurized water discharge pipe provided with an automatic pressure regulator to generate minute bubbles to float the floating material into the floating space;
A sludge storage tank in which the floating sludge removed by the floating sludge remover flows in and stored; A filtered water storage tank in which solid-liquid separation and filtered water from the flotation filtration tank is introduced and stored; A backwashing unit connected to the filtered water storage tank and backwashing the filtered water with the filter to remove foreign matter clogged by the filter by backwashing; A drain tank through which filtered water flows from the filtered water storage tank and flows out through an outflow pipe; And a control unit for controlling operation of the apparatus,
If the measurement value measured by the water level meter and transmitted to the control unit exceeds the reference value, the control unit alternately performs the filtration process and the backwash process on the first sintered mesh filter pipe and the second sintered mesh filter pipe So that continuous filtration can be performed. [Claim 6] The flotation and continuous filtration type water treatment apparatus for simultaneously removing nitrogen and phosphorus.
The method according to claim 1,
The inlet includes an inlet pipe, an inlet flow meter for measuring an inflow amount of the fluid flowing into the pH reactor through the inlet pipe, and a measurement value transmission unit for transmitting the measurement value to the control unit. The control unit measures the concentration of suspended substances in the fluid, An inflow SS concentration meter, and an inflow TP meter for measuring the total concentration of the fluid and transmitting the measured value to the control unit, wherein both nitrogen and phosphorus are simultaneously removed.
The method according to claim 1,
The pH meter measures the pH of the fluid and sends the measured value to the controller. The controller determines whether the pH is increased or decreased according to the measured value, and alerts or performs a subsequent treatment. Combined water and water treatment system for simultaneous removal of nitrogen and phosphorus.
The method according to claim 1,
The floatation filtration tank includes a fluid direction switching induction plate for removing floating sludge collected in the floating space and having a microstructure attached thereto and guiding suspended particles attached to the microstructure to the floating space, And is inclined toward the rear upper side,
Characterized in that the micro-bubble spray nozzles are provided on the front and rear sides of the fluid direction change-over guide plate, respectively, to perform primary flotation and secondary flotation, simultaneously removing nitrogen and phosphorus.
The method according to claim 1,
Wherein the filtered water outflow pipe and the pressurized water discharge pipe are connected to each other through a micro bubble inflow pipe provided with a micro bubble automatic valve,
The backwashing unit includes a backwash pipe connected between the filtration water storage tank and the microbubble inflow pipe and through which the filtered water is backwashed, a backwash pump installed in the backwash pipe for backwashing the filtered water stored in the filtration water storage tank, And a backwashing automatic valve installed in the backwash pipe to open and close the flow of filtered water backwashed,
In the backwashing section, the filtered water automatic valve is closed and the backwash automatic valve and the micro-bubble automatic valve are opened, the pressurized water saturated with compressed air and the backwash water supplied through the backwash pipe 810 are backwashed by the filter Wherein the sintered mesh filter tube is desorbed and floated so as to be floated up by fine bubbles, wherein both the nitrogen and phosphorus are removed simultaneously.
The method according to claim 1,
The bubble supplying unit pressurizes a part of the filtered water stored in the filtered water storage tank with a pressurized water pump to generate pressurized water and introduce it into the air dissolution reactor through a pressurized pipe connected to the filtered water storage tank, Wherein the air-dissolving reactor reacts pressurized water with compressed air to generate pressurized water containing compressed air, wherein the pressurized water contains nitrogen and phosphorus, Combined water treatment system for flotation and continuous filtration.
The method according to claim 1,
Wherein the filtered water storage tank is provided with a water level adjusting device, and the filtered water collected by the operation of the water level adjusting device is flowed into the outflow tank, thereby simultaneously removing nitrogen and phosphorus.
The method according to claim 1,
The outflow tank includes an outflow pipe, an outflow meter that measures an outflow amount of the fluid flowing out through the outflow pipe and transmits a measurement value to the control unit, a measurement unit that measures a concentration of a suspended matter in the fluid stored in the outflow tank, And an outflow TP meter for measuring the total concentration of the fluid stored in the outflow tank and transmitting the measured value to the control unit, wherein both nitrogen and phosphorus are simultaneously removed.

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