KR101511967B1 - Water treatment apparatus and Water treatment methods using the same - Google Patents

Abstract

The present invention relates to a rain · wastewater treatment equipment and a method of water treatment and back wash using the same. According to an embodiment of the present invention, the water treatment equipment comprises: a pretreatment tank to filter off contaminants contained in the influent water using a natural sedimentation method; a filtering tank to absorb and remove fine contaminants by upstream filtering using a floating filter medium; and a treatment tank to store the water filtered and treated by the floating filter medium of the upstream treatment tank; and a back wash pipe and an air feed pipe installed in a the filtering tank to back wash the filter bed inside the filtering tank consisting of the floating filter medium, which features back wash implemented with 1, 2, and 3 steps by using the treated water in the lower part of the filtering tank, a water head difference between the pretreatment tank and the filtering tank, and the treated water stored in the treatment tank.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water treatment apparatus and a water treatment method using the same,

The present invention relates to a water treatment apparatus and a water treatment and backwashing method using the water treatment apparatus, and more particularly, to a water / wastewater treatment apparatus having a backwash function for cleaning the filter media at the end of inflow of treated water, To a water treatment and a backwashing method.

Water pollution sources are classified as point pollution sources and nonpoint pollution sources depending on the nature of pollution source. Point pollution sources are pollutants emitted in the form of sewage or ditches from the point of clearly recognizing pollutant emissions. Nonpoint pollutants are discharged from a large area by being washed away by rainwater, and are discharged from scattered pollutants which are difficult to understand exactly what is the source it means.

Generally, nonpoint pollution sources are also called non-specific pollution sources, surface pollution sources, mobile pollution sources, or other pollutants. Unlike point pollution sources having specific discharge paths, nonpoint pollution occurs through unspecified discharge paths such as urban road drainage and agricultural drainage. To indicate the place or area.

Non-point pollutants are mainly pollutants that run out along with surface runoffs during rainfall. They include fertilizers and pesticides applied to farmland, soil spatulas, housing spills, traffic pollutants, dust and waste in urban areas, Water, and air pollutants that have fallen on the surface of the earth.

Recently, the management of water pollution total amount management system has been strengthening the management of non-point pollutants such as roads and parking lots where inflow of pollutants intermittently occurs. In order to maintain stable water quality, There is a growing interest in road surface drainage.

Korean Patent Publication No. 0538124 discloses a water treatment system for purifying water quality through a carrier made of polyethylene and waste tires in order to efficiently treat nonpoint pollutants introduced into rivers in the treatment of nonpoint pollutants.

However, in the conventional water treatment apparatus, there is no backwash function for washing the filter medium, so that the filter layer is blocked with time, and the filtration performance and the treatment efficiency are extremely low, and maintenance costs such as replacement and cleaning of the filter medium are expensive. And maintenance is difficult, and there is a problem in that the life of the filter medium and the facility is short due to a large load applied to the filter medium during the filtration process.

Korean Patent No. 10-0538124 (Date of Notification: Dec. 21, 2005)

SUMMARY OF THE INVENTION An object of the present invention is to provide a wastewater treatment apparatus which has a backwash function and can maintain a high filtration efficiency even in a subsequent treatment.

Another object to be solved by the present invention is to provide a wastewater treatment apparatus capable of backwashing the wastewater several times at the time of backwashing so that uniform and efficient backwashing is possible throughout the media.

Another object to be solved by the present invention is to provide a wastewater treatment apparatus capable of reducing the maintenance cost by recycling treatment water stored in a backwash treatment tank to backwash water.

Another object of the present invention is to provide a water / wastewater treatment apparatus which can ensure ease of maintenance in the future such as replacement of filter media by performing filtration treatment using a floating lightweight filter medium.

Another problem to be solved by the present invention is to provide a water treatment and sewage treatment device capable of extremely reducing the filtration load on the filtration treatment tank through pretreatment such as sedimentation filtration by natural sedimentation method and collection of impurities through a pretreatment tank prior to full- .

Another object to be solved by the present invention is to provide an efficient filtration process for treated water and a right / wastewater treatment and backwashing method for effectively backwashing filter media.

According to an aspect of the present invention as a means for solving the problems, A drain pipe for collecting the coarse contaminants contained in the inflow water flowing through the inflow pipe is installed, and a residual water discharge pump and a residual water discharge pipe Pre-treatment tank; And a filtering layer formed of a floating filter material and communicating with the pretreatment tank through a gate so that the pre-treated primary treatment water flows from below through the gate and passes through the filter layer, ; A treated water tank for storing the treated water filtered through the filtration treatment tank and discharging the treated water out of the main body through an outflow pipe on the other side of the main body; And a mechanical chamber provided with a backwash pump and an air blower for supplying washing water and air for washing the filtration layer, the filter chamber being separated from the filtration treatment tank, A first reverse water introduction pipe for introducing the reverse flow pipe into the filtration treatment tank and using the primary treatment water filled in the filtration treatment tank below the filtration layer as backwash water, And a second reverse water introduction pipe for introducing the treated water into the reverse osmosis water introduction pipe and utilizing it as reverse osmosis water.

In one aspect of the present invention, the gate is formed on a first partition wall separating the pretreatment tank and the filtration treatment tank, and an open water gate may be installed on the gate.

At this time, it is preferable that the gate and the open water gate are provided lower than the lower portion of the filtration layer.

The apparatus may further include a V-shaped channel formed through the bottom of the filtration treatment vessel to communicate with the gate.

The V-type water channel is composed of a flow passage communicating with the gate and an inclined surface at an upper portion of the flow passage inclined toward the flow passage, and a spray pipe can be piped to the apex of the inclined surface.

At this time, the spray pipe may be connected to a backwash pump installed in a machine room.

The impurity collection net applied to one aspect of the present invention is installed on a wall surface of the inner wall of the pre-treatment tank at the outlet of the inlet pipe, and can be elevated and lowered on a guide rail attached to the inner wall surface so as to be drawn out to the outside through a check passage in the upper portion of the pre- Lt; / RTI >

As another example, the impurity collection net may be configured such that the lower side thereof is hinged to the inner wall surface of the pre-treatment vessel on the outlet side of the inlet pipe so that the upper side can be turned toward the inspection passage on the upper portion of the pretreatment vessel.

In this case, the impurity collection network may be configured such that the collection net is separated / stored in the collection net support, one end of the towing line is connected to one side of the collection network, and the other end of the towing line is connected to the check passage entrance side ring .

One aspect of the present invention may further include an upper screen for limiting the floating height of the floating filter media constituting the filter layer.

At this time, the upper screen may be installed lower than the overflow between the filtration treatment tank and the treatment water tank.

The apparatus may further include a lower screen for limiting the downward movement of the floating filter media constituting the filtration layer.

The first reverse water introduction pipe applied to one side is connected to the backwash pump installed in the machine room through a second partition wall separating the filtration treatment vessel and the machine room, and the second reverse water introduction pipe is connected to the treatment water tank and the machine room And may be connected to the backwash pump through a third partition wall which separates and separates.

Also, first and second automatic valves, which are individually controlled to be opened and closed, may be installed in the first reverse water introduction pipe and the second reverse water introduction pipe, respectively.

At this time, during backwashing using the primary treated water under the filtration layer in the filtration treatment tank as wash water, the first automatic valve is opened and the second automatic valve is maintained in the closed state, and the treated water stored in the treated water tank is discharged into the washing water In the used backwash, the first automatic valve may be closed and the second automatic valve may be open.

According to another aspect of the present invention, there is provided a water treatment and backwashing method using a water / wastewater treatment apparatus according to one aspect of the present invention, wherein natural contaminants are used to remove contaminants contained in influent water in a pretreatment tank of the water treatment apparatus A pretreatment step of precipitating and removing; The filtration treatment for filtering and adsorbing the fine contaminants contained in the primary treatment water through the upward flow filtration treatment in which the treated water passed through the pretreatment step is passed through the filtration layer composed of the floating filter medium in the water treatment apparatus filtration treatment tank step; And a backwash step of performing washing to recover the function of the filtration layer after inflow of the influent water is completed. The present invention also provides a water treatment and backwashing method using the right wastewater treatment apparatus.

Wherein the backwashing step comprises circulating the primary treated water in the lower portion of the filtration tank through the filtration layer by using a backwash pump and spraying the filtrate through the reverse osmosis tube with a strong pressure toward the filtration layer, A primary backwash for desorbing contaminants; A second backwash for washing the filtration layer through automatic backwash using a difference in level between the pretreatment tank and the filtration treatment tank; And a tertiary backwash for circulating the treated water stored in the treated water tank to the upper portion of the filtration layer by using a backwash pump and injecting the filtered water through the reverse osmosis tube with a strong pressure to clean the floating filter media again .

Preferably, in the primary backwash, air is sprayed toward the filtration layer at a predetermined pressure from the bottom of the filtration layer together with the primary treated water injection through the retrofit tub, thereby removing the contaminants adhering to the floating filter media.

In the second backwash, the water gate is closed and the residual elimination pump is operated to lower the water level of the pre-treatment tank. Thereafter, the water gate is opened and the automatic backwashing is performed through the head difference between the pre-treatment tank and the filtration tank.

After the filtration layer is backwashed through the backwashing step, the residual water rejection pump is operated to discharge the treated water stored in the pretreatment tank and the filtration tank to the outside, and then the inside of the treatment tank is maintained in a dry state. .

According to the embodiment of the present invention, since the backwash function is provided, it is possible to maintain a high filtration efficiency even in the subsequent treatment. By using water and air during backwashing, uniform and efficient backwashing over the floating filter media is possible. Therefore, it is possible to increase the filtration duration time and improve the filtration water quality.

In addition, the backwash is performed several times, such as the primary backwash using the primary treated water and the air, and the secondary backwash using automatic backwash using the water level difference between the treatment baths and the tertiary backwash using treated water, The efficiency can be greatly improved and the maintenance cost can be greatly reduced as compared with the method of withdrawing the washing water (tap water) from the outside by recycling the treated water stored in the treatment tank in the backwashing tank to the backwash water.

Furthermore, the use of a lightweight filter material that can float is advantageous in ensuring ease of maintenance such as replacement of filter media. Prior to the full-scale filtration process, pre-processing such as sedimentation filtration of natural sedimentation method, The filtration load on the filtration treatment tank can be extremely reduced, so that the filtration treatment state of high quality can be maintained for a long time.

1 is a plan view of a wastewater treatment apparatus according to an embodiment of the present invention;
2 is a cross-sectional view of the right-wastewater treatment device shown in Fig.
3 is a cross-sectional view of the right / wastewater treatment apparatus shown in Fig.
4 is a cross-sectional view of the right / wastewater treatment apparatus shown in Fig.
5 is a cross-sectional view of the right / wastewater treatment apparatus shown in Fig. 1 viewed from the DD line direction.
6 is a cross-sectional view of the waste water treatment apparatus shown in Fig.
FIG. 7 is a view showing a preferred embodiment of a contaminant collecting net installed in a pretreatment tank; FIG.
FIG. 8 is a flow chart of a process of water treatment through the right wastewater treatment apparatus according to the present invention. FIG.
Fig. 9 is an operational state diagram of the present invention at the time of water treatment; Fig.
10 is a flow chart of the process of filtering back the filtration layer through the waste water treatment device according to the present invention.
11 to 13 are operating state diagrams of the present invention when the filter layer is reversed.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a plan view of a water treatment apparatus according to an embodiment of the present invention, and FIGS. 2 to 6 are cross-sectional views of the water treatment apparatus shown in FIG. 1 in various directions.

1 to 6, a right and wastewater treatment apparatus according to an embodiment of the present invention includes a pretreatment tank 10 provided at one side of a main body 1 and provided with a scum trapping net 110, A filtration treatment tank 20 communicating with the pretreatment tank 10 through the filtration treatment tank 20 and a treatment water tank 30 storing the treated water subjected to the final filtration treatment through the filtration treatment tank 20. And a machine room 40 separated from the filtration treatment tank 20 and the treatment water tank 30.

The pretreatment tank 10 is provided with a residual water discharge pump 130 and a residual water discharge pipe 140 extending from the residual water discharge pump 130 extends to the outside of the main body 1. [ In the filtration treatment tank 20, a filtration layer 210 composed of spherical floating filter media 212 is provided. In addition, a reverse flow pipe 240 and an air supply pipe 250 are connected to the upper and lower portions of the filtration layer 210 to prevent the filtration layer 210 from being blocked and to recover filtration performance, respectively.

The machine room 40 is provided with a backwash pump 400 and an air blower 410 for supplying washing water and air for washing the filter layer 210, respectively. The backwash tube 240 and the air supply pipe 250 are connected to the delivery side of the backwash pump 400 and the air blower 410 and extend to the filtration treatment tank 20 side. The washing water and the washing air can be injected at a predetermined pressure toward the filtration layer 210 from above and below the filtration layer 210 through the backwash pump 400 and the air blower 410. [

The inflow water flows into the pretreatment tank 10 through the inflow pipe 100 connected to one side portion of the main body 1 and a part of the contaminants is removed through natural sedimentation in the pretreatment tank 10, To the filtration treatment tank 20 through the filtration tank. Then, the filtration layer 210 of the filtration treatment tank 20 is passed through from below to move to the treatment tank 30 through upward flow filtration to remove fine contaminants.

The pretreatment of the inflow water performed in the pretreatment tank 10 is performed by a first coarse contaminant filtration process by the contaminant trapping net 110 installed on the wall surface of the pretreatment tank 10 so as to cover the outlet of the inflow pipe 100, A natural sedimentation method using a specific gravity difference can be classified into a second sedimentation treatment in which the specific gravity of the sediment is greater than that of water such as sand or soil so that the contaminants that have settled to the bottom of the pretreatment tank 10 are discharged to the residual water discharge pump 130 .

The pretreatment tank 10 and the filtration treatment tank 20 are separated from each other through a first partition 15 in the main body 1 and the gate 200 is formed on the first partition 15. Therefore, the primary treated water after the pretreatment can be transferred to the filtration treatment tank 20 through the gate 200. At this time, the gate 200 is located on the lower side of the filtration treatment tank 20, so that the primary treatment water has an upward flow that flows upward under the filtration treatment tank 20.

The gate 200 of the first partition 15 is provided with an openable water gate 160 which is openable and closable. The gate 200 and the open sluice 160 may be provided at a position lower than the lower surface of the filtration layer 210 so that the primary treatment water 20 stored in the automatic backwashing filtration treatment tank 20, The filtration layer 210 can be cleaned while flowing back to the pretreatment tank 10 side.

As shown in FIG. 5, a V-shaped channel 260 is formed on the bottom of the filtration treatment tank 20 to communicate with the gate 200 and extend toward the opposite side from the pretreatment tank. The V-shaped channel 260 is composed of a flow passage 262 communicating with the gate 200 and a slope 265 located above the flow passage inclined toward the flow passage 262, The water spray pipe 270 may be piped.

The water spray pipe 270 is connected to the backwash pump 400 installed in the machine room 40 and discharges the treated water to the slope 265 during the third backwashing of the filtration layer 210 using the treated water stored in the water treatment tank do. Accordingly, in the filtration and backwashing process, the contaminants deposited on the inclined surface 265 are swept down to the flow passage 262 by the treatment water injected through the water spray pipe, and are sent to the pretreatment tank 10 side via the gate 200 Can be moved.

The primary treatment water pretreated through the pretreatment tank 10 flows downward into the filtration treatment tank 20 through the gate 200 and the filtration layer 210 composed of the floating filter media 212 flows downward And then moves to the treatment water tank 30. At this time, fine contaminants contained in the primary treatment water are adsorbed on the floating filter media 212 and filtered (upward flow filtration) during the passage through the filtration layer 210.

The floating filter material 212 forming the filtration layer 210 is composed of a spherical filter medium having a specific gravity smaller than that of the treated water so as to be able to float with the rise of the water level in the filtration treatment tank 20, (Not shown), or may be filled in a mesh network of a box shape to form a plurality of unit filter bodies, though not shown in the figure.

The upper screen 220 and the lower screen 230 serve to divide a space into which the floating filter material 212 forming the filter layer 210 can be housed as described above, 20, the upward and downward movements of the floating filter media 212 in accordance with the change in the level of the primary treated water in the primary treatment water are restricted to a certain height.

The upper screen 220 is provided between the filtration treatment tank 20 and the treatment water tank 30 so as to prevent the floating filter medium 212 from flowing along the overflow weir 28 to the treatment water tank 30 side during filtration treatment. And the lower screen 230 is disposed higher than the gate 200 so as to flow to the side of the pretreatment tank 10 through the passage 150 together with the automatic backwashing water to be described later It does not.

The treatment water tank 30 is connected to an outlet pipe (not shown) provided on the other side of the main body 1 to communicate with the filtration treatment tank 20 so that the treatment water can flow through the overflow warehouse 28, 300). Therefore, the treated water that has undergone the final filtration through the filtration treatment tank 20 is moved to and stored in the treatment water tank 30 through the overflow ware 28. When the water reaches the predetermined level, To the outside of the main body (1).

3 and 6, the waste water treatment system according to the embodiment of the present invention includes a first reverse water introduction pipe 243 and a second reverse water introduction pipe 247. As shown in FIGS. The first countercleaning water introducing pipe 243 is used to utilize the primary treated water filled in the filtration treatment tank 20 under the floating filter medium 212 as the primary countercurrent water, Is to utilize the treated water stored in the treated water tank 30 as a tertiary backwash water.

The first reverse water introduction pipe 243 has a second partition 25 for separating the filtration treatment tank 20 and the mechanical chamber 40 from the lower side of the filtration treatment tank 20 below the filtration layer 210 And is connected to a backwash pump (400) installed in the machine room (40). The second reverse water introduction pipe 247 passes through the third partition wall 35 separating the processing water tank 30 and the machine room 40 from the lower side of the treatment water tank 30 and is connected to the backwash pump 400 .

First and second automatic valves V1 and V2 which are individually controlled to be opened and closed are respectively installed in the first and second counter-water introduction pipes 243 and 247, The first and second automatic valves V1 and V2 can be independently opened and closed to use the lower primary treated water of the filtration treatment tank 20 as wash water or to store the treated water in the treated water tank 30 The treated water can be used as washing water.

The first automatic valve V1 is opened and the second automatic valve V2 is maintained in the closed state in the primary backwash (to be described later) using the treated water downstream of the filtration treatment tank 20 as washing water. In the third backwash (to be described later), the first automatic valve V1 is closed and the second automatic valve V2 is opened, so that the treated water stored in the process water tank 30 is used as the washing water.

7 (a), the contaminant collecting net 110 is arranged on the inner wall surface of the pretreatment tank 10 on the outlet side of the inflow pipe 100, And can be configured to be able to move up and down along a guide rail 160 attached to the inner wall surface so as to be drawn out through the inspection passage 170 on the upper portion of the pretreatment tank 10.

7 (b), the pre-treatment tank 10 at the outlet side of the inflow pipe 100 can be rotated upward toward the inspection passage 150 above the pre-treatment tank 10, And the lower side is hinged to the inner wall surface so that the coarse contaminants collected in the scum trapping net 110 can be easily opened by opening the inlet of the inspection passage 170.

As shown in FIG. 7 (c), the dust collecting net support 110a is configured to be rotatable and rotatable with a plurality of frames, and the dust collecting net support 110a can be separated / And one end of the pull string is connected to one side of the collecting net 110b and the other end of the pull string is connected to the loop on the inlet side of the check passage to pull the pull string to the outside of the check passage It may be configured to be pulled out.

The water treatment process performed through the water treatment apparatus according to the embodiment of the present invention and the washing process (backwashing) after the water treatment will be described in connection with the operation of the present invention.

FIG. 8 is a flowchart illustrating a process of water treatment through the water treatment apparatus according to the present invention. FIG. 9 is an operational state diagram of the present invention at the time of water treatment, and a water treatment process performed through the water treatment apparatus according to the present invention will be described with reference to these drawings.

8 and 9, the water treatment through the wastewater treatment apparatus according to the embodiment of the present invention includes a pretreatment for separating and removing contaminants having a specific gravity larger than water, such as sand or soil, through the pretreatment tank 10 , And a full-scale filtration treatment step of passing the primary treatment water through the filtration layer 210 composed of the floating filter media 212 to filter the fine contaminants.

In the pretreatment step through the pretreatment tank 10, a process of precipitating and removing contaminants contained in the influent water is performed through natural sedimentation using the difference in specific gravity with respect to the water. In the filtration process step through the filtration treatment tank 20, A process of filtrating and adsorbing the fine contaminants contained in the primary treatment water is performed through an upward flow filtration process in which the filtration layer 210 composed of the filter medium 212 is passed upwardly.

In the pretreatment step, relatively large coarse contaminants such as vinyl, styrofoam, cans, leaves, and branches contained in the inflow water are filtered through the contaminant trapping net 110, and the specific gravity of the water passing through the contaminant trapping net 110 Large contaminants are precipitated on the bottom of the pretreatment tank 10 through natural sedimentation while being retained in the pretreatment tank 10 for a predetermined time, and are discharged to the outside of the pretreatment tank intermittently through the residual water discharge means 130 and 140.

The fine contaminants not precipitated in the pretreatment step are sent to the filtration treatment tank 20 through the flow passage 262 of the V-shaped channel 260 at the bottom side of the filtration treatment tank 20 through the gate 200 together with the primary treatment water Flow. Then, an upward flow filtration process is performed in which the filtration layer 210 composed of floating oil media in the filtration treatment tank 20 is passed through from above and below together with the primary treatment water, and most of the water is removed through the filtration layer 210 do.

The final treated water filtered through the upflow filtration treatment in the filtration treatment tank 20 to the fine contaminants flows over the overflow ware 28 between the filtration treatment tank 20 and the treated water tank 30, And is transported to the treatment water tank 30 and stored. When the level of the treated water stored in the treated water tank 30 reaches a certain level, the water is naturally discharged to the outside through the outflow pipe 300 communicated with the sidewall of the treated water tank 30.

As the filtration treatment through the filtration treatment tank 20 continues, the filtration layer 210 is occluded due to the fine contaminants adsorbed on the floating filter media 212, and the filtration flow rate is changed, so that the treatment efficiency may drop sharply. Accordingly, the filtration flow rate is continuously monitored to reduce the filtration performance by dropping below the set flow rate, or by removing fine contaminants adhering to the filtration layer 210 through backwashing when inflow water is terminated.

The washing (backwashing) of the filtration layer will be described later with reference to FIG. 10 and FIG.

FIG. 10 is a processing flow chart for cleaning the filtration layer through the water treatment apparatus according to the present invention, and FIGS. 11 to 13 are operational status views of the present invention in the filtration layer washing (backwashing).

10 to 13, in the backwashing step for washing the filtration layer 210, a primary backwash (not shown) for washing the filtration layer 210 using the lower primary treated water of the filtration treatment tank 20 of the water treatment apparatus, The second backwash of the natural washing method using the difference in level between the pretreatment tank 10 and the filtration treatment tank 20 and the final washing of the filtration layer 20 using the treated water stored in the treatment tank 30 Includes tertiary back taxes.

11, the primary treated water at the lower side of the filtration treatment tank 20 is circulated to the upper portion of the filtration layer 210 by using the backwash pump 400 and is sprayed with strong pressure through the retrofit tube 240, At the same time, air is blown out with a uniform distribution toward the filtration layer 210 at a predetermined pressure through an air supply pipe 250 under the filtration layer 210 to desorb the contaminants attached to the floating filter media 212.

The filtration treatment tank 241 is connected to the bottom of the filter treatment tank 20 through the first reverse water supply pipe 243 connected to the bottom of the filtration treatment tank 20 and the backwash pump 400 connected to the first reverse water supply pipe 243, The first automatic valve V1 can be opened and closed so that the first treated water can flow along the first countertop water inlet pipe 243, State.

After the first backwash using the primary treated water and air is completed, a difference in level between the pretreatment tank 10 and the filtration treatment tank 20 is generated, and the filtration layer 210 is washed again using the water level difference. Second backwash is done. That is, after the primary backwashing, the filtration layer 210 is once again cleaned through automatic backwashing secondary backwash using the water level difference between the pretreatment tank 10 and the filtration treatment tank 20.

In the second automatic backwash, the gate 160 is closed to close the gate 200, the operation of the backwash pump 400 is stopped, the residual water discharge pump 130 is operated, and the residual water in the pre- So that the treated water in the filtration treatment tank 20 flows back to the pretreatment tank 10 by opening the water gate 160 as shown in FIG. 12 to generate a water head difference between the pretreatment tank 10 and the filtration treatment tank 20 So that the filter layer 210 can be cleaned.

After the inflow of the treated water is finished, the water level in the filtration treatment tank 20 immediately before the backwash is maintained at the height of the overflow ware 28, and the waterway door 160 is positioned lower than the lower portion of the filtration layer. Thus, when the residual water in the pretreatment tank 10 is forcibly discharged and then the water gate 160 is opened, the primary treated water below the filtration layer and the treated water above the filtration layer stored in the filtration treatment tank 20 are naturally pretreated And flows back to the tank 10 side.

In this process, the treatment water on the filtration layer 210 passes through the filtration layer 210 inversely to the above-described filtration treatment, and the filtrate layer 210 is washed again to remove the floc-type contaminants adhering to the filtration layer 210 It is done. That is, the filtration layer 210, which has been immersed in the treated water in the process water backwashing process, is cleaned by the flow of the backwashing water, thereby performing automatic washing.

The residual water discharge pump 130 is continuously driven during the above-described second automatic backwash using the water level difference, so that when the second automatic backwashing is terminated, the filtration treatment tank 20 and the pretreatment tank 10 Only a small amount of treated water is present. In this state, tertiary backwash is performed to wash the filtration layer 210 again using the treated water stored in the treatment water tank 30 as wash water.

13, the treated water stored in the treated water tank 30 is sprayed at a strong pressure through the retrofit tube 240 at the upper portion of the filtration layer 210 using the backwash pump 400, 212 is again washed. In the tertiary backwash, the treated water stored in the treatment water tank 30 is forcedly transferred to the backwash water 240 through the second reverse water introduction pipe 247 and the backwash pump 400 to perform cleaning.

In the third backwash, the water gate 160 is opened again, the residual water discharge pump 130 is operated, and the washing water having been cleaned by the filtering layer is supplied to the pretreatment tank 10 by the residual water discharge pump 130 through the pretreatment tank 10, The process of removing the contaminants deposited on the bottom side inclined surface 265 of the filtration treatment tank 20 is carried out at the same time.

The treatment of the contaminants deposited on the inclined plane 265 can be removed by spraying wash water (treated water stored in the treatment water tank) to the inclined plane 265 through the water spray pipe 270 at a constant pressure, as shown in FIG. That is, washing water is sprayed on the inclined surface 265 to wash contaminants together with the washing water into the flow passage 262, and the washing water is moved to the pretreatment tank 10 through the gate 200, And discharged out of the main body 1 by force.

On the other hand, when the backwashing of the filtration layer 210 through the backwashing step is completed as described above, all the treated water stored in the pretreatment tank 10 and the filtration treatment tank 20 is discharged to the outside The method may further include a drying step of keeping the inside of the treatment tank in a dry state for a predetermined period of time. Through the drying step, odor and insect pests can be prevented from being generated in the treatment facility.

According to the embodiment of the present invention as described above, since the backwash function is provided, it is possible to maintain a high filtration efficiency even in the subsequent treatment. By using water and air during backwashing, uniform and efficient backwashing Thus, it is possible to increase the filtration duration time and improve the filtration water quality.

In addition, the backwash is performed several times, such as the primary backwash using the primary treated water and air, the secondary backwash using automatic backwash using the water level difference between the treatment baths, and the tertiary backwash using treated water , The backwash efficiency can be greatly improved, and the maintenance cost can be greatly reduced as compared with the method of backwashing the wash water from outside by recycling the treated water stored in the backwash treatment tank to the backwash water.

Furthermore, the use of a lightweight filter material that can float is advantageous in ensuring ease of maintenance such as replacement of filter media. Prior to the full-scale filtration process, pre-processing such as sedimentation filtration of natural sedimentation method, The filtration load on the filtration treatment tank can be extremely reduced, so that the filtration treatment state of high quality can be maintained for a long time.

While the invention has been shown and described with reference to certain embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. The present invention can be variously modified and changed by those skilled in the art, and it is also within the scope of the present invention.

1: Body 10: Pretreatment tank
15: first partition 20: filtration tank
25: second partition 28: overflow ware
30: water treatment tank 35: third partition
40: Machine room
100: inlet pipe 110:
130: Residual water discharge pump 140: Residual water discharge pipe
150: passage 160:
200: gate 210: filtration layer
212: floating filter material 220: upper screen
230: Lower screen 240: Flow and flushing tube
243: first stationary water introduction pipe 247: second station water introduction pipe
250: Air supply pipe 260: V-shaped channel
262: flow passage 265: inclined surface
270: Water pipe
V1, V2: Automatic valve

Claims (20)

main body;
And a residual water discharge pump for discharging the residual water and a residual water discharge pipe for discharging the residual water are provided in the main body of the main body, Pretreatment tank;
And a filtering layer formed of a floating filter material and communicating with the pretreatment tank through a gate so that the pre-treated primary treatment water flows from below through the gate and passes through the filter layer, ;
A treated water tank for storing the treated water filtered through the filtration treatment tank and discharging the treated water out of the main body through an outflow pipe on the other side of the main body; And
And a mechanical chamber provided with a backwash pump and an air blower for separating the filtration treatment tank and the treatment water tank and supplying wash water and air for cleaning the filtration layer,
Wherein a reverse flow pipe is disposed above the filtration layer of the filtration treatment tank and an air supply pipe is disposed below the filtration layer and a first reverse water introduction pipe for utilizing the primary treatment water filled in the filtration treatment tank below the filtration layer as counter- A second reverse water introduction pipe for introducing treated water stored in the treatment water tank into the reverse water wash water and a V-shaped water channel formed along the bottom of the filtering treatment tank,
Wherein the V-type water channel includes a flow path communicating with the gate and an inclined surface on an upper portion of the flow path, and a water spray pipe is disposed on the inclined surface.
The method according to claim 1,
Wherein the gate is formed in a first partition wall separating the pretreatment tank and the filtration treatment tank, and an open water gate is provided in the gate.
3. The method of claim 2,
Wherein the gate and the open water gate are provided lower than the lower portion of the filtration layer.
delete delete The method according to claim 1,
Wherein the water spray pipe is connected to a backwash pump installed in a machine room.
The method according to claim 1,
Wherein the impurity collection net is installed on a wall surface of the pre-treatment tank on the inlet pipe outlet side,
And a guide rail mounted on the inner wall surface so as to be able to be drawn out to the outside through a check passage in the upper portion of the pre-treatment tank.
The method according to claim 1,
Wherein the impurity collection net is hingedly coupled to a wall surface of the pre-treatment vessel on the outlet side of the inlet pipe so that the impurity collection net can be turned upward toward the inspection passage on the upper portion of the pre-treatment vessel.
9. The method of claim 8,
Wherein the trapping net is constructed so that the trapping net can be separated / stored in the trapping net support, one end of the traction line is connected to one side of the trapping net, and the other end of the traction line is connected to the check passage entrance side ring. Sewage treatment device.
The method according to claim 1,
And an upper screen for limiting the floating height of the floating filter media constituting the filtration layer,
11. The method of claim 10,
Wherein the upper screen is installed lower than the overflow between the filtration treatment tank and the treatment water tank,
11. The method of claim 10,
And a lower screen for restricting downward movement of the floating filter media constituting the filtration layer,
The method according to claim 1,
Wherein the first reverse water introduction pipe is connected to the backwash pump installed in the machine room through a second partition wall separating the filtration treatment vessel and the machine room,
Wherein the second reverse water introduction pipe is connected to the backwash pump through a third partition wall separating the processing water tank and the machine room,
14. The method of claim 13,
Wherein the first reverse water supply pipe and the second reverse water supply pipe are provided with first and second automatic valves that are individually controlled to be opened and closed,
15. The method of claim 14,
The first automatic valve is opened and the second automatic valve is maintained in a closed state in the backwash using the primary treated water below the filtration layer in the filtration treatment tank as the washing water,
Wherein the first automatic valve is closed and the second automatic valve is opened and closed in backwash using treated water stored in the treated water tank as washing water.
15. A water treatment and backwashing method using the right wastewater treatment apparatus according to any one of claims 1 to 15,
A pretreatment step of precipitating contaminants contained in influent water in a pretreatment tank of the water treatment apparatus using natural sedimentation;
The filtration treatment for filtering and adsorbing the fine contaminants contained in the primary treatment water through the upward flow filtration treatment in which the treated water passed through the pretreatment step is passed through the filtration layer composed of the floating filter medium in the water treatment apparatus filtration treatment tank step; And
And a backwash step of performing washing to recover the function of the filtration layer after inflow of influent water is completed,
The back-
The primary treated water under the filtration layer in the filtration treatment tank is circulated to the upper portion of the filtration layer by a backwash pump and is sprayed at a strong pressure toward the filtration layer through a reverse flow pipe to remove contaminants adhering to the floating filter media Backwash;
A second backwash for washing the filtration layer through automatic backwash using a difference in level between the pretreatment tank and the filtration treatment tank;
And a tertiary backwash for circulating the treated water stored in the treated water tank to the upper portion of the filtration layer by using a backwash pump and jetting the treated water to the filtration layer through a reverse osmosis tube with a strong pressure to wash the floating filter media again. And water treatment and backwashing method using a wastewater treatment device.
delete 17. The method of claim 16,
Wherein the first primary backwash injects primary treated water through a reverse osmosis tube and injects air toward the filtration layer under a predetermined pressure from the bottom of the filtration layer to thereby desorb the contaminants adhering to the floating filter media. (WATER TREATMENT AND STACKWAY METHOD USING TREATMENT DEVICE)
17. The method of claim 16,
In the second backwash, the water gate is closed and the residual water discharging pump is operated to lower the water level of the pre-treatment tank, and then the water gate is opened so that automatic backwashing is performed through the head difference between the pretreatment tank and the filtration tank. Used water treatment and backwashing method.
17. The method of claim 16,
And a drying step of operating the residual water discharge pump after the backwash of the filtration layer through the backwashing step to discharge the treated water stored in the pretreatment tank and the filtration tank to the outside and then maintaining the interior of the treatment tank in a dry state Water treatment and backwashing method using a wastewater treatment device.

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