KR0161203B1 - Intra-clarifier and a method of backwashing the filter bed - Google Patents

Abstract

The present invention relates to a filtration-integrated settling tank and its backwashing method, wherein sedimentation tanks 30, 70, and 100 which precipitate and remove suspended solids heavier than water by gravity and flow out the supernatant water from which the suspended particles are removed as treated water. Filtration and collection means (60) for collecting the fine floc and particles in the supernatant water and collecting the fine floc and particles from which the fine flocs and particles have been removed and flowing out as treated water is installed on the water surface of the water). As the filtration is performed at the same time, it is very advantageous in terms of facility cost, space required, and maintenance, and the vibration layer is applied to the inside of the filtration layer 64 of the filtration and collecting means 60 to form the filtration layer 64. By separating the solids attached between the filter media, the filter media can be easily backwashed.

Description

Filtration integrated sedimentation tank and its backwashing method

1 is a general water treatment process chart.

2 is a schematic view of the adsorption coagulation filtration integrated settling tank according to the present invention.

Figure 3 (a) is a schematic diagram of one embodiment of a filtration and collection device according to the present invention.

(b) is a schematic diagram of two embodiments of a filtration and collection device according to the present invention;

4 is a schematic representation of one embodiment of a filtration layer according to the invention.

5 is a schematic view of a coagulation filtration integrated settling tank according to the present invention.

6 is a schematic view of a filtration integrated settling tank according to the present invention.

7 is a schematic view of one embodiment of a water treatment apparatus according to the present invention.

8 is a schematic view of a water treatment apparatus equipped with one embodiment of the filter medium backwashing apparatus according to the present invention.

9 is a schematic view of a water treatment apparatus equipped with two embodiments of the filter medium backwashing apparatus according to the present invention.

* Explanation of symbols for the main parts of the drawings

20: inflow tank 30: adsorption coagulation integrated precipitation tank

32: sludge blanket 34: sludge contact

36: concentrated portion 37: treated water outlet

38: sludge withdrawal valve 39: water level adjustment valve

40: stirring and flocculating part 42: cylindrical tube

44: stirrer 50: secondary flocculation unit

52: cylinder tube 54: air supply valve

56 exhaust valve 60 filtration and collection means

62: orifice 64: filtration layer

66: filter medium support plate 67-1: cylinder tube

67-2: Propeller type stirrer 68: Collection plate

69: sump 70: agglomerated sedimentation tank

72: sludge blanket 74: sludge contact

76: thickening portion 78: sludge withdrawal valve

80: rapid stirring tank 82: rapid stirrer

90: slow stirring tank 92: slow stirring

100: sedimentation tank 102: sludge collector

126, 130: wastewater treatment means 140: countercurrent means

150: water gauge

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water treatment apparatus for removing contaminants in raw water, and more particularly, to a filtration-integrated settling tank and a method for backwashing thereof, wherein the sedimentation and filtration are simultaneously performed in one tank.

In general, methods for removing contaminants from raw water, such as water or wastewater, are largely classified into physical, chemical, and biological methods, and various combinations of the above methods are used to remove contaminants in raw water according to contaminants in raw water.

The water treatment process shown in FIG. 1 is one of representative water treatment processes for treating raw water such as water or wastewater by a physicochemical method combining the physical and chemical methods. It consists of four steps.

That is, the conventional water treatment apparatus for performing the above water treatment process, the adsorption tank (2) for adsorbing the dissolved material in the raw water by stirring the raw water and the adsorbent, and the process is performed in the adsorption tank (2) Primary agglomeration tank (4), in which the organic matter, microorganism, colloid, suspended particles or heavy metals in raw water are added by aggregating and stirring in an optimal pH state to agglomerate the particles to agglomerate by chemical reaction for easy precipitation. After agglomeration in the agglomeration tank 4, the agglomeration aid is added and stirred to further promote agglomeration of the particles formed in the primary agglomeration tank 4 so that the agglomerates grow into larger and heavier agglomerates (floc). Sedimentation tank (8) and sedimentation tank (8), which separates the symbolic water from which flocs have been removed by sedimentation and removal of flocs formed in the tank (6) and the secondary flocculation tank (6), Save temporarily Consists of a water storage tank 10 and the water storage tank 10, filter 12 for filtering out the outlet can be treated as a symbol stored in the supplying to the filter (12).

However, as described above, the conventional water treatment device has a very disadvantageous problem in terms of facility cost, space required, and maintenance as the filter 12 is separately installed and used separately from the settling tank 10.

Therefore, the present invention is to solve the above problems of the prior art, it is to perform the sedimentation and filtration process at the same time in one tank, the filtration integral sedimentation tank and the filtration integral sedimentation tank which is very advantageous in terms of facility cost, space required, maintenance The goal is to provide an easy way for backwashing.

In an integrated filtration settling tank according to the present invention for achieving this object, in the settling tank that precipitates by removing the suspended particles heavier than water by gravity, and discharges the supernatant water from which the suspended particles are removed as treated water,

In addition to the removal of the fine floc and particles in the supernatant water, the fine floc and the particles are removed, characterized in that the filtration and collecting means for collecting the outflow as treated water is installed on the surface of the settling tank.

In addition, the filtration-integrated settling tank backwashing method according to the present invention is a method for backwashing a filtration-integrated settling tank equipped with filtration and collecting means on the water surface of the settling tank,

Vibration is applied to the inside of the filtration layer of the filtration and collecting means by an ultrasonic oscillator to separate the solid matter attached between the filter medium forming the filtration layer.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

2 is a schematic diagram of the adsorption coagulation filtration integrated precipitation tank according to the present invention, the adsorption coagulation filtration integrated precipitation tank according to the present invention, the filtration and collecting means 60 is further provided on the upper part of the adsorption aggregation filtration integrated precipitation tank 30 It is.

That is, the adsorption coagulation-integrated settling tank shown in FIG. 2 comprises an inflow tank 20 and an adsorption coagulation-integrated settling tank 30, while stirring and agglomeration means 40 are formed at the center of the adsorption coagulation-integrated settling tank 30. FIG. And secondary agglomeration means 50 are provided, respectively, and the surface of the adsorption agglomeration integrated sedimentation tank 30 has a structure in which filtration and collection means 60 are provided.

The agitation and agglomeration means 40 adsorbs the floc floating in the lower portion of the adsorption agglomeration integrated sedimentation tank 30 and the wastewater, the adsorbent and the flocculant of the inflow tank 20 to adsorb and contaminate the contaminants in the raw water. The secondary agglomeration means 50 is configured to further agglomerate contaminants aggregated by the agitation and agglomeration means 40 to form flocs.

That is, the stirring and aggregating means 40 has a structure in which a stirrer 44 is installed inside the cylindrical tube 42 having both ends of the opening, and the suction is performed by the positive force generated as the stirrer 44 rotates. The floc floating in the lower part of the coagulation integrated precipitation tank 30 and the raw water, the adsorbent, and the coagulant of the inflow tank 20 are introduced and stirred to adsorb and agglomerate contaminants in the raw water.

In this case, powdered activated carbon, granular activated carbon, zeolite, etc. are used as the adsorbent, and as the stirrer 44, a propeller stirrer, a paddle-type stirrer, an air aeration, an underwater pump, an ejector, and a submersible mixer are used. use.

In addition, the secondary agglomeration means 50 has a structure in which a cylindrical tube 52 having an opening at the bottom thereof is formed to surround the exterior of the cylindrical tube 42 of the agitation and agglomeration means 40. By the pumping force generated by the rotation, the contaminants of the raw water that has flown through the cylindrical pipe 42 of the stirring and agglomeration means 40 are further aggregated to form flocs.

In addition, the filtration and collecting means 60 is a floc formed by the secondary flocculating means 50 to remove the fine flocs and particles in the symbol water removed by sedimentation, and the fine flocs and particles are removed The symbol water is collected and flowed out as treated water.

That is, the filtration and water collecting means 60 is installed so that the orifice 62, which is a perforated pipe, is submerged in the water surface, and the filtration layer 64 is formed up to a predetermined depth including the periphery of the orifice 62. .

In addition, a sludge blanket detection sensor (not shown) is installed in the adsorption precipitation integrated sedimentation tank 30 to detect the water level of the sludge blanket 32, and interlocks with the sludge blanket detection sensor to adjust the stirring force of the stirrer 44. By adjusting, the water level of the sludge blanket 32 is kept constant.

In addition, a transparent observation window (not shown) is installed in the adsorption precipitation settling tank 30 so as to observe the inside, and a fog lamp (sodium lamp) for killing the inside of the settling tank 30 is installed, and the settling tank 30 is provided. The internal precipitation state can be observed by the user.

3A is a schematic view of one embodiment of a filtration and collection device according to the present invention. In the filtration and collection device according to the present invention, a collection plate 68 made of a mesh or a porous plate is installed under the water surface. It has a structure in which the filtration layer 64 is formed from the collection plate 68 to below a predetermined depth.

In addition, Figure 3b is a schematic diagram of a second embodiment of the filtration and water collecting device according to the present invention, the filtration and water collecting device according to the present invention is provided with a water collecting passage 69 made of a channel body or a porous plate, etc. The lower portion of the collecting channel 69 is submerged in the water surface, and has a structure in which the filtration layer 64 is formed up to a predetermined depth including the lower portion of the collecting channel 69.

In this case, the filter medium constituting the filter layer 64 is a mixture of ceramic powder and the like mixed with synthetic resin to adjust the specific gravity in the range of 0.8 ~ 0.98 and the particle size of 2 ~ 10mm and the specific gravity in the range of 0.5 ~ 0.85 The 3 mm filter medium is mixed, and when the filter medium is suspended, the filter medium having a large particle size is positioned at the lower portion, and the filter medium having a small particle size is disposed at the upper portion thereof.

In addition, in the case of using sand, anthracite, or the like having a specific gravity greater than water as the filter medium constituting the filter layer 64, as shown in FIG. 4, the filter medium does not go into the water without water. In order to form the filter layer 64 in the vicinity, the filter medium is supported using a filter medium support plate 66 made of a mesh, a porous plate, or the like.

In this case, the particle size range of the filter medium having a specific gravity greater than water is 0.2 to 10 mm, the specific gravity is 1 to 3, the lamination thickness of the filter layer is 50 to 1000 mm, and the range of the surface area loading rate and the filter line speed is 0.6. It is preferable to set it as -5m <3> / m <2> hr.

In addition, in the case of using a multi-layered filter medium having high specific gravity such as sand or anthracite with different specific gravity on the filter medium support plate 66 as described above, the filter medium having a large particle size has a particle size at the lower part by increasing the diameter of the high specific gravity filter medium. The small filter medium is mainly distributed in the upper part and can exhibit a good multilayer filtration function.

Further, by further laminating an ion exchange resin having a particle diameter of 0.2 to 3 mm on the filtration layer 64, other ions such as heavy metals in an ionic state can be removed in parallel with the filtration function, in which case the ion exchange resin is periodically or a predetermined amount. It is preferable to continuously regenerate and fill up.

On the other hand, Figure 5 is a schematic cross-sectional view of the coagulation filtration integrated settling tank according to the present invention, the coagulation filtration integrated settling tank according to the present invention, the filtration and collecting means 60 is further provided on top of the coagulation integrated settling tank 70 It is.

That is, in the coagulation filtration integrated precipitation tank shown in FIG. 5, a rapid agitation tank 80 is provided in the upper center of the agglomeration integrated precipitation tank 70, and a slow stirring tank 90 is provided below the rapid agitation tank 80. On the other hand, the surface of the aggregation integrated sedimentation tank 70 has a structure provided with filtration and collecting means (60).

The rapid agitation tank 80 is configured to rapidly agitate the raw water and the flocculant to adsorb and agglomerate contaminants in the raw water, and the slow agitation tank 90 slows down the raw water introduced from the rapid agitation tank 80 at a low speed. By stirring, the contaminants aggregated by the rapid agitation tank 80 are further aggregated to form flocs.

In addition, the filtration and collecting means 60 is a symbol in which the floc formed by the slow stirring tank 90 removes fine flocs and particles in the symbol water removed by sedimentation, and the fine flocs and particles are removed. The water is collected and flowed out as treated water.

That is, the filtration and water collecting means 60 is installed so that the orifice 62, which is a perforated pipe, is submerged in the water surface, and the filtration layer 64 is formed up to a predetermined depth including the periphery of the orifice 62. .

6 is a schematic cross-sectional view of the integrated filtration settling tank according to the present invention, the filtration integrated settling tank according to the present invention, the filtration and collection on the water surface of the settling tank 100 equipped with a sludge collector 102 for removing the settled sludge The means 60 is further provided.

As shown in FIG. 2, the filtration and collecting means 60 removes the fine floes and particles in the symbol water removed by floc sedimentation and removes the symbol water from which the fine flocs and particles have been removed. The water is collected and discharged as treated water.

That is, the filtration and collecting means 60 is installed so that the orifice 62, which is a perforated pipe, is submerged in the surface of the water, and the filtration layer 64 is formed up to a predetermined depth including the periphery of the orifice 62. In addition, it is easy to install the filtration and collecting means 60 in the existing sedimentation basin already installed and operating.

7 is a schematic cross-sectional view of one embodiment of the water treatment apparatus according to the present invention, in which the adsorption coagulation filtration integrated precipitation tank shown in FIG. 2 is connected in series in two stages.

The water treatment apparatus shown in FIG. 7 includes the first water treatment means 120 for treating raw water and distilling the first stage treatment water, and the first stage treatment water flowing out of the first water treatment means 120. The second water treatment means 130 for treatment and outflow, and the backflow means 140 for introducing a floc circulating in the second water treatment means 130 into the first water treatment means 120. have.

That is, the treated water flowing out of the first wastewater treatment means 120 consisting of the inflow tank 20-1 and the adsorption aggregation integrated precipitation tank 30-1 is combined with the inflow tank 20-2 and the adsorption aggregation filtration integrated precipitation tank 30-. 2) flows into the inflow tank 20-2 of the second water treatment means 130, which is treated by the second water treatment means 130 and flows out as the final treated water, while the second water treatment means Counter flow means 140 flows back into the inlet 20-1 of the first water treatment means 120 through a floc circulating in the lower part of the adsorption coagulation filtration integrated settling tank 30-2 of 130. It is structure to let.

Referring to the operation and effects of the filter-integrated settling tank according to the present invention configured as described above are as follows.

In the adsorption flocculation filtration integrated precipitation tank according to the present invention shown in FIG. 2, when the stirrer 44 of the stirring and flocculation means 40 rotates, the adsorption flocculation integrated precipitation tank 30 is stirred by the stirring force of the stirrer 44. Floc floating in the lower part of the) and the raw water, the adsorbent and the flocculant of the inflow tank 20 is stirred while being introduced into the cylindrical tube 42 of the stirring and flocculating means 40, the amount of the stirrer 44 It flows into the cylindrical tube 52 which is the secondary agglomeration means 50 by hydraulic power, and as floc forms in the cylindrical tube 52, it progresses to the sludge contact part 34 through the opening formed in the lower part of the cylindrical tube 52. Inflow.

In addition, the floc and water are separated from the sludge contact part 34 so that the water rises upward to form a symbolic water, and the floc is formed at a high concentration in the sludge contact part 34 while forming or circulating the sludge blanket 32, and a high concentration of floc. It precipitates and is settled to the concentration part 36.

At this time, the floc of the high concentration settled in the condenser 36 is periodically withdrawn through the sludge withdrawal valve 38.

Then, the supernatant water is removed from the filtration layer 64 of the filtration and collecting means 60, and then the fine floc and particles are introduced into the orifice 62 through the hole of the orifice 62 and flows out as treated water.

In the flocculation filtration settling tank according to the present invention shown in FIG. 5, the raw water and the coagulant introduced from the outside are stirred by the high speed stirrer 82 of the rapid stirring tank 80, and the high speed stirrer 82 is used. Into the slow stirring tank (90) by the pumping force of the slow stirring tank (92) of the slow stirring tank (90) while the floc formation proceeds as the stirring proceeds to the lower portion of the slow stirring tank (90) It is introduced into the sludge contact portion 74 through the formed opening.

In addition, the floc and water are separated from the sludge contact portion 74 so that the water rises up to form a symbolic water, and the floc is formed at a high concentration in the sludge contact portion 74 while forming or circulating the sludge blanket 72, and a high concentration of floc. Is precipitated and settles to the concentration section 76.

At this time, the floc settled in the condenser 76 is periodically withdrawn through the sludge withdrawal valve 78.

In addition, the dissolved fine floc and particles of the supernatant in which the floc is removed by gravity are collected in the filtration layer 64 of the filtration and collecting means 60, and the fine floc and the particles are collected by the filtration layer 64. The removed symbol water flows into the orifice 62 through the hole of the orifice 62 and flows out as the treated water.

In addition, in the filtration-integrated settling tank according to the present invention shown in FIG. 6, the wastewater introduced into the settling tank 100 is separated from the floc and water so that the water rises up to form a symbolic water, and the floc is the bottom of the settling tank 100. To settle.

At this time, the sludge formed by sedimentation of the floc is periodically removed by the sludge collector 102.

In addition, the supernatant water is removed from the filtration layer 64 of the filtration and collecting means 60, and then flows into the orifice 62 through the hole of the orifice 62 and flows out as treated water.

And, in the first embodiment of the water treatment apparatus according to the present invention shown in Figure 7, in the first water treatment means 120 consisting of the inlet tank 20-1 and the adsorption coagulation integrated settling tank 30-1 The outflowed treated water flows into the inflow tank 20-2 of the second water treatment means 130, which is composed of the inflow tank 20-2 and the adsorption coagulation filtration integrated precipitation tank 30-2, and the second water treatment means ( 130 is treated and discharged as the final treated water, while the adsorbent used in the second water treatment means 130, the adsorption flocculation filtration integrated settling tank 30-2, collects a floc circulated at the bottom together with the flocculant. To form.

The second wastewater treatment means 130 with low contamination of the adsorbate reaches an equilibrium state, and the adsorbents with low adsorption capacity are returned to the first water treatment means 120 with higher pollution. Further adsorption capacity is achieved until the state is reached.

Therefore, the backflow means 140 for flowing back the sludge at the lower portion of the second water treatment means 130 again flows the sludge back into the inlet 20-1 of the first water treatment means 120, thereby allowing the first water to flow back. The treatment means 120 to further absorb the absorbed material to reduce the consumption of the adsorbent and to treat the raw water more precisely.

On the other hand, Figure 8 is a schematic diagram of a wastewater treatment apparatus equipped with one embodiment of the filter medium backwashing apparatus according to the present invention, the level control valve 39 for adjusting the water level in the adsorption coagulation filtration integrated settling tank 30 of FIG. On the other hand, the upper portion of the cylindrical tube 52 of the secondary agglomeration means 50 is formed in a closed structure, the air supply valve 54 and the exhaust valve 56 is provided on the upper portion of the cylindrical tube 52 It is a structure provided further.

The method of backwashing the solid matter attached to the filter medium forming the filtration layer 64 in the adsorption coagulation filtration integrated settling tank 30 having the above structure is as follows.

By closing the wastewater control valve 46 to stop the inflow of wastewater and stopping the operation of the stirrer 44, the head of the secondary flocculation means 50 is closed while the exhaust valve 56 is closed. The high pressure compressed air is introduced into the secondary agglomeration means 50 through the air supply valve 54 so as to lower the pulsation low water level (a).

At this time, the sludge withdrawal valve 38 or the water level control valve 39 is opened, so that the turbidity generated during the backwashing process due to the rise of the head due to the backwash pulsation does not overflow into the treated water outlet 37. ), The water level is lowered to the backwash start water level (f).

In addition, when the air supply valve 54 is closed and the exhaust valve 56 is rapidly opened, the air pressure in the upper part of the secondary agglomeration means 50 is drastically lowered and the secondary valve is caused by the water head difference with the filtration layer 64. As the water level of the flocculating means 50 rises rapidly from the pulsation low level (a) to the pulsation high level (b), the filtration layer 64 drops from the backwash initiation level (c) to the pulsation low level (d), and the water head difference generated again. By causing the pulsating motion of the water level in the secondary agglomeration means 50 and the water level of the filtration layer 64 crosses the rise and fall repeatedly, the filtration layer is rubbed with each other as the filtration layer 64 is disturbed by the pulsation motion. Solids adhered between the filter media are separated from the filter layer 64 and settle down.

At this time, by installing a water gauge 150 for detecting the water level of the inflow tank 20 as the water level, it is backwashed in conjunction with the water gauge 150.

That is, as the amount of solids trapped in the filtration layer 64 increases, the filtration rate decreases and the level of the inflow tank 20 increases as the level of the inflow tank 20 increases. Since, it is to perform the backwash in conjunction with the water gauge 150 for detecting the water level of the inflow tank (20).

On the other hand, Figure 9 is a schematic view of the wastewater treatment apparatus equipped with two embodiments of the filter medium backwashing apparatus according to the present invention, the filtration layer of the filtration and collecting means 60 provided on the water surface of the settling tank (30, 70, 100) 64 is provided with a cylindrical tube 67-1 having an opening at its intermediate portion, and a propeller-type stirrer 67-2 provided inside the cylindrical tube 67-1.

That is, when the propeller type stirrer 67-2 is operated, the filter medium of the filtration layer 64 is disturbed by the rotational force of the propeller type stirrer 67-2 to move downward to separate the solid matter attached to the filter medium.

In addition, another method of backwashing the filter medium of the filtration-integrated settling tank according to the present invention, by vibrating the inside of the filter layer 64 with an ultrasonic oscillator to separate the solid matter attached between the filter medium of the filter layer 64.

As described above, according to the present invention, as the precipitation and filtration are simultaneously performed in one tank, not only is it very advantageous in terms of facility cost, space required, and maintenance, and the filter medium can be easily backwashed.

Claims (17)

In the settling tank (30, 70, 100) for sedimentation and removal of suspended particles heavier than water by gravity, and flowing out the supernatant water from which the suspended particles are removed as treated water, removing fine floc and particles in the supernatant water; Filtration and sedimentation tank, characterized in that the filtration and collecting means (60) for collecting the fine water and the fine water from which the fine particles have been removed and discharged as treated water is installed on the water surface of the settling tank (30, 70, 100). According to claim 1, wherein the filtration and collecting means 60, the orifice 62 which is an oil hole pipe is installed so as to be submerged in the water surface of the settling tank (30, 70, 100), including the periphery of the orifice 62 Filtration integrated settling tank, characterized in that the filter layer 64 is formed to a predetermined depth below. 2. The collecting and collecting means (60) according to claim 1, wherein the filtration and collecting means (60) is provided with a collecting plate (68) formed with a plurality of lattice holes under the water surface of the settling tank (30, 70, 100). Filtration integrated settling tank, characterized in that the filter layer 64 is formed to a predetermined depth below. According to claim 1, wherein the filtration and collecting means 60, a collecting channel 69 in the form of a channel formed with a plurality of lattice holes is provided in the settling tank (30, 70, 100), the collecting channel (69) The lower part is immersed in the water surface of the settling tank (30, 70, 100), including the lower portion of the water collecting passage (69), the filtration-integrated settling tank, characterized in that the structure is formed to a certain depth below. The filtration-integrated settling tank according to claim 2, wherein the filtration layer (64) has a specific gravity smaller than that of water and is formed by floating lamination of a filter medium as fine particles. The filter medium according to claim 5, wherein the filter medium has a structure in which a specific gravity of 2 to 10 mm filter medium having a specific gravity adjusted to a range of 0.8 to 0.98 and a 0.2 to 3 mm filter medium having a specific gravity adjusted to a range of 0.5 to 0.95 are mixed. Filtration integrated settling tank, characterized in that. The filter layer (62) according to claim 2, wherein the filter layer (62) has a structure in which a specific gravity is larger than that of water by the filter support plate (66) in which a plurality of lattice holes are formed, and the filter medium is supported by fine particles. Filtration integrated precipitation tank. The filtration-integrated settling tank according to claim 7, wherein the particle size range of the filter medium is 0.2-10 mm, and the specific gravity is 1-3. The filtration integrated settling tank according to claim 2, wherein an ion exchange resin is further laminated on the filtration layer (64). The filtration integrated precipitation tank according to claim 1, wherein the precipitation tank (30, 70, 100) is provided with an observation window for observing the inside and an illumination lamp for irradiating the inside of the precipitation tank (30, 70, 100). While the inlet tank 20 and the adsorption agglomeration integrated sedimentation tank 30 are formed, the central portion of the adsorption agglomeration integrated sedimentation tank 30 is provided with stirring and agglomeration means 40 and a secondary agglomeration means 50, respectively. In the wastewater treatment apparatus equipped with the filtration and collecting means 60, the sludge blanket detection sensor is installed on the water surface of the aggregation integrated sedimentation tank 30, and the sludge blanket detection sensor is detected. Filtration integrated settling tank, characterized in that the agitation force of the stirring and agglomeration means 40 is adjusted in conjunction with the water level of the sludge blanket (32). The first wastewater treatment means 120 consisting of the inflow tank 20-1 and the adsorption flocculation integrated precipitation tank 30-1, and the two consisting of the inflow tank 20-2 and the adsorption flocculation filtration integrated precipitation tank 30-2. While the first water treatment means 130 is connected in series, the floc formed in the second water treatment means 130 is transferred to the inflow tank 20-1 of the first water treatment means 130 by the backflow means 140. Integral filtration settling tank to be introduced. Stirring and agglomeration means 40 and a secondary agglomeration means 50 are respectively provided at the center of the adsorption agglomeration integrated sedimentation tank 30 which receives the raw water from the inflow tank 20, and the water surface of the adsorption agglomeration integrated sedimentation tank 30 is provided. In the adsorption flocculation filtration-integrated sedimentation tank equipped with the filtration and collecting means 60, the upper part of the secondary agglomeration means 50 is formed in a sealed structure, the air supply means 54 in the upper portion of the cylindrical tube 52 ) And an exhaust means 56 are provided so that high pressure compressed air is introduced into the secondary agglomeration means 50 through the air supply means 54, and then the compressed air is rapidly discharged through the exhaust means 56. The water level in the secondary agglomeration means (50) and the filtration layer (64) of the filtration and collecting means (60) cause a pulsating motion to cross the rising and falling repeatedly to form a filter medium forming the filtration layer (64). To separate the attached solids Filtered integral settling tank having a filter medium for backwashing function. 15. The method of claim 13, wherein the adsorption agglomeration integrated sedimentation tank (30) is further provided with a water level control means (39) for adjusting the water level, when the high pressure compressed air into the secondary agglomeration means (50) Open the water level control means 39 to raise the water level of the filtration layer 64 so that the turbidity generated in the backwashing process is not overflowed to the treated water outlet 37 due to the head elevation due to the pulsating motion. Wastewater treatment device having a filter medium backwashing, characterized in that to be lowered to. 14. The filtration-integrated settling tank according to claim 13, wherein a water level gauge (150) for detecting the water level of the inflow tank (20) is additionally installed and backwashing is performed in conjunction with the water level gauge (150). In the filtration-integrated sedimentation tank having filtration and water collecting means 60 on the water surface of the sedimentation tanks 30, 70, and 100, a cylindrical tube having an opening in the middle of the filtration layer 64 of the filtration and water collecting means 60 ( 67-1) is installed, and a propeller type stirrer 67-2 is provided inside the cylindrical tube 67-1, and the filtration layer 64 is formed by the rotational force of the propeller type stirrer 67-2. A filter-integrated settling tank having a filter medium backwashing function, characterized in that the filter medium is disturbed to separate solid matter attached to the filter medium. In the filter medium backwashing method of the filtration-integrated sedimentation tank having filtration and water collecting means 60 on the surface of the sedimentation tanks 30, 70, and 100, an ultrasonic oscillator inside the filtration layer 64 of the filtration and water collecting means 60. The filter medium backwashing method of the filtration-integrated settling tank, characterized in that to separate the solids attached between the filter medium forming the filter layer (64) by applying a vibration.