KR101621030B1 - Water treatment apparatus and Water treatment methods using the same - Google Patents

Water treatment apparatus and Water treatment methods using the same Download PDF

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Publication number
KR101621030B1
KR101621030B1 KR1020150061884A KR20150061884A KR101621030B1 KR 101621030 B1 KR101621030 B1 KR 101621030B1 KR 1020150061884 A KR1020150061884 A KR 1020150061884A KR 20150061884 A KR20150061884 A KR 20150061884A KR 101621030 B1 KR101621030 B1 KR 101621030B1
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South Korea
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water
treatment
filtration
tank
filtration layer
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KR1020150061884A
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Korean (ko)
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김중삼
김치열
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(주) 디아이엔바이로
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/02—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration
    • B01D24/10—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being held in a closed container
    • B01D24/14—Downward filtration, the container having distribution or collection headers or pervious conduits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/46—Regenerating the filtering material in the filter
    • B01D24/4631—Counter-current flushing, e.g. by air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/48—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof integrally combined with devices for controlling the filtration
    • B01D24/4807—Handling the filter cake for purposes other than regenerating
    • B01D24/4815—Handling the filter cake for purposes other than regenerating for washing
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C02F1/004—Processes for the treatment of water whereby the filtration technique is of importance using large scale industrial sized filters

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Filtration Of Liquid (AREA)

Abstract

Wastewater, wastewater, and rainwater reuse filtration type treatment apparatus, and water treatment and backwashing method using the same. According to an embodiment of the present invention, there is provided a processing apparatus for processing wastewater and rainwater reuse, comprising: a pretreatment tank for filtering contaminants included in a treatment target water by using a natural sedimentation system; A water treatment tank in which the treated water that has undergone the final filtration treatment through the filtration treatment tank and a filtration treatment tank in which the fine solids contained in the water are filtered, And a mechanical chamber having an air blower for recovering the filtering function of the filtration layer by using the treated water and air stored in the treatment bath.

Description

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

More particularly, the present invention relates to a treatment apparatus for reducing a nonpoint pollution source in which a pollution source is not specified. More particularly, the present invention relates to a treatment apparatus for filtering pollutants mixed in a treatment target water (for example, rainwater) through a downflow filtration method using a granular filter medium, Water and rainwater reuse filtration type processing apparatus having a backwash function for recovering the function of a filter medium, and water treatment and backwashing method using the same.

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.

Accordingly, various types of water treatment facilities for filtering intermittently introduced contaminants and discharging them to the water system have been proposed. For example, the water treatment facility disclosed in Korean Patent Publication No. 0538124 attempts to improve the water quality by separating the non-point pollutant flowing into the river together with the rainwater by using a carrier made of polyethylene and waste tire will be.

However, in the conventional water treatment facilities including the technology disclosed in the above-mentioned patent publications, filtration performance and treatment efficiency are deteriorated due to the clogging of the filter layer due to the absence of the cleaning function, and maintenance of facilities such as replacement and cleaning of filter media And there is a problem that the life of the filter medium and the facility is short because the load on the filter medium is large during the filtration process.

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

SUMMARY OF THE INVENTION It is an object of the present invention to provide a filtration-type treatment apparatus for wastewater and rainwater reuse capable of effectively filtering contaminants mixed with water to be treated through a downflow filtration system using granular filter media.

Another object to be solved by the present invention is to provide a filtration-type treatment apparatus for rainwater, wastewater, and rainwater having a backwash function for recovering filtration performance at the time of clogging of filter media.

Another object to be solved by the present invention is to provide a treatment device for a wastewater, a wastewater and a rainwater reuse capable of uniformly and effectively backwashing through the filter medium using treated water and air in the backwashing treatment tank.

Another object of the present invention is to provide a waste water / wastewater reuse filtration type treatment apparatus capable of reducing the maintenance cost by recycling treatment water remaining in the backwash treatment tank to backwash water.

Another object of the present invention is to provide a treatment device for a wastewater, a wastewater and a rainwater reuse type which can be easily maintained and maintained, such as replacement of a filter media, by using a lightweight granular filter media.

Another object to be solved by the present invention is to provide a method for reducing the amount of filtration in a filtration tank by pretreatment such as trapping of coarse particles through a pretreatment tank and natural sedimentation of a needle bed prior to full- And to provide a filtration-type treatment apparatus.

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,

As a three-dimensional structure to be buried underground for wastewater treatment,

A pretreatment tank for primary treatment using gravity type sedimentation and collection network;

A filtration treatment tank for filtering the primary treated water flowing from the pretreatment tank by a downflow filtration method; And

And a primary treatment water inflow pipe connecting the upper space of the filtration layer of the filtration treatment tank and the upper space of the pretreatment tank and having a water hole having a bleed- Consistently,

The storage water in the pre-treatment tank is supplied to the inside of the filtration treatment tank through the primary treatment water inflow pipe or the storage water in the upper part of the filtration layer is moved to the pretreatment tank through the primary treatment water inflow pipe according to the water level of the pre- And a rainwater reuse filtration type treatment device.

According to a preferred aspect of the present invention as a means for solving the problems,

A three-dimensional structure to be buried in the ground for the treatment of wastewater and wastewater. The three-dimensional structure is connected to an inflow pipe through which water to be treated flows and is connected to a contaminant collection network for removing contaminants contained in the water to be treated, A pretreatment tank with drainage pump and piping for discharge of wash water;

A filtration layer formed to a predetermined thickness by granular filtration media; and a collecting layer below the filtration layer composed of a plurality of collecting devices, wherein the first treated water having passed through the pretreatment tank is passed through the first treated water inflow pipe A filtration treatment tank for filtering fine solids contained in the primary treatment water as a downflow filtration introduced and passing through the filtration layer;

A treatment water tank in which a treated water having been purified through the filtration treatment tank is stored, and an outflow pipe is connected to a predetermined height so that the stored treatment water can be discharged to the outside when the stored water reaches a certain water level; And

And a mechanical chamber provided with a backwash pump and an air blower for supplying water and air for washing the filtration layer in the space, the mechanical chamber being separated from the filtration treatment tank and the treatment water tank,

A water channel is formed on one side of the bottom of the water collecting layer in the filtration treatment tank, an air header pipe connected to the air blower is piped to the water channel, the water treatment tank and the water channel are connected to each other through a reverse water introduction pipe, And the backwash pump is installed in the middle of the pipe.

In the present invention, the pretreatment tank and the filtration treatment tank are separated by the first bank, the treatment tank and the mechanical chamber are separated from each other through the second bank, and an entrance may be formed in the upper portion of the first bank.

In the present invention, the filtration layer is divided into a lower filtration layer and an upper filtration layer. In this case, the grain size of the granular filtration media of the lower filtration layer is made smaller than that of the upper filtration layer, .

In addition, the water channel is connected to the treatment water tank through a treatment water pipe passing through the machine room, so that the final treated water filtered through the filtration layer and flowing through the treatment water can be introduced into the treatment water tank through the treatment water pipe.

The primary treatment water inflow pipe according to the present invention is extended from the pretreatment tank and is disposed on the upper part of the filtration layer. The primary treatment water inflow pipe above the filtration layer has water holes formed at regular intervals, It may be a configuration in which a drain hole is provided in the water supply hole.

Preferably, the filtration treatment tank may be divided into two or more filtration treatment spaces by at least one partition wall formed at a lower height than the primary treatment water inflow pipe.

According to an aspect of the present invention, there is further provided a filtration tank discharge pipe connecting the water channel and the pre-treatment tank to discharge the treated water in the filtration tank to the pretreatment tank.

According to another aspect of the present invention as a means for solving the problem, there is provided a water treatment and backwashing method using a water / wastewater / rainwater reuse filtration type treatment apparatus according to the above aspect,

Among the contaminants introduced into the pretreatment tank of the waste water and rainwater reuse filtration type treatment apparatus together with the number of the objects to be treated, the bulky contaminants are filtered through the trap net and the contaminants having a larger specific gravity than the water are removed from the treated water A pretreatment step of separating;

A filtration treatment step of passing the primary treated water through the pretreatment step from the top to the bottom of the filtration tank in the filtration treatment tank of the right wastewater and rainwater reuse filtration type treatment apparatus to filter out the fine solids contained in the primary treatment water;

A discharge step of temporarily storing the final treated water filtered through the filtration treatment step to the micro-solids in the treated water tank and allowing the natural treated water to be naturally discharged when the water reaches a certain level; And

And a backwash step of performing a washing operation to recover the function of the filtration layer in the filtration treatment tank after the inflow of the water to be treated is terminated.

Here,

A first backwash that uses air blowers to spray air at a predetermined pressure from the bottom of the filtration layer toward the filtration layer to disturb the filtration layer and desorb the contaminants;

A second backwash that draws the treated water stored in the treated water tank by using a backwash pump together with air blowing and injects the water at a certain pressure toward the filtration layer from below the filtration layer to disturb the filtration layer and to desorb the contaminants;

A third backwash that allows the treated water stored in the treated water tank to flow into the filtration treatment tank to allow the suspended matter above the filtration layer to be discharged to the pretreatment tank through the primary treated water inflow pipe; The backwash can be performed through a single backwash using only one selected backwashing method or a multi-stage backwash using a combination of two or more backwashing methods.

In addition, when the washing of the filtration layer is completed through the backwashing step, a drying step of discharging all the washing water stored in the pretreatment tank and the filtration tank to the outside using a drain pump installed in the pretreatment tank and then keeping the interior of the treatment apparatus in a dry state; As shown in FIG.

According to the embodiment of the present invention, contaminants mixed with the water to be treated can be more efficiently filtered and discharged through the downflow filtration method using the granular filter media, and filtration performance can be recovered through backwashing when the filter media is closed, It is possible to continuously maintain high filtration efficiency even in the subsequent treatment.

Further, since a mixture of air and water is used for backwashing, uniform and efficient backwashing can be performed over the floating filter media constituting the filtration layer. Therefore, the filtration duration can be increased and the filtration water quality can be improved, (Tap water) is drawn from the outside and used for backwashing water, it is advantageous from the viewpoint of economical efficiency because the maintenance cost is greatly reduced as compared with the method of backwashing the water.

Furthermore, since pretreatment such as sediment filtration in the sedimentation method is carried out prior to the full-scale filtration treatment, the filtration load on the filtration layer in the full-scale filtration treatment can be extremely reduced, and thus, the high-quality filtration treatment state can be maintained for a long time And it is also advantageous in that it can disturb the filter medium with less energy at the time of backwashing so that the pollutant can be desorbed and discharged.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a processing apparatus for filtration of rainwater, wastewater and rainwater according to an embodiment of the present invention; FIG.
FIG. 2 is a cross-sectional view of the processing apparatus for right / left-hand and rainwater reuse used in FIG.
FIG. 3 is a cross-sectional view of the right-wastewater and rainwater reuse-filtering type processing apparatus shown in FIG. 1 viewed from the BB line direction.
FIG. 4 is a cross-sectional view of the processing apparatus for the right, the waste water and the rainwater reuse shown in FIG. 1 viewed from the CC line direction.
FIG. 5 is a cross-sectional view of the right-wastewater and rainwater reuse-filtering type processing apparatus shown in FIG.
6 is a cross-sectional view taken along the line EE of Fig. 1 showing the processing apparatus for the waste water and rainwater reuse;
7 is a sectional view taken along the line EE of Fig. 1 showing another preferred embodiment of the filtration treatment tank.
FIG. 8 is a flow chart of a process of water treatment through a waste water / rainwater reuse filtration type 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.
FIG. 10 is a flow chart of a process of backfiltering a filtration layer through a treatment device for the waste water and rainwater reuse type according to the present invention. FIG.
Fig. 11 and Fig. 12 are operational states of the present invention when the filtration layer is reversed.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the present invention, a detailed description of known configurations will be omitted, and a detailed description of configurations that may unnecessarily obscure the gist of the present invention will be omitted.

FIG. 1 is a plan view of a water treatment apparatus according to an embodiment of the present invention, and FIGS. 2 to 6 show cross-sectional views of the right, the waste water and the rainwater reuse-filtering type treatment apparatus shown in FIG. 1 in various directions.

Referring to FIGS. 1 to 6, the three-dimensional structure to be buried in the ground for reducing the pollution source includes a pretreatment tank 10, a filtration treatment tank 10, (20), and a treatment water tank (30). And a machine room (40) which is separated from the filtration treatment tank (20) and the treatment water tank (30) to form an independent closed space.

The pretreatment tank 10 and the filtration treatment tank 20 are separated by the first partition 15 and the treatment tank 30 and the machine chamber 40 are partitioned by the second partition wall 25 ). The treatment tank 30 and the machine room 40 are separated from each other through a third partition wall and an upper portion of the first partition wall 15 is provided with an entrance 150 are formed.

In the pretreatment tank 10, an inflow pipe 100 through which a treatment target water (for example, rainwater or sewage, wastewater, etc.) flows is connected, and a coarse contaminant contained in the treatment target water flowing through the inflow pipe 100 is removed A scum collection net 110 is installed. In addition, a drain pump 130 for discharging residual water and backwash water is installed on the bottom of the pretreatment tank 10, and a manhole entrance (not shown) for forming a passage for the maintenance of the facility is formed in the upper part do.

A pipe 132 extending from the drain pump 130 at the bottom of the pretreatment tank 10 extends to the upper side of the pretreatment tank 10 and extends outside the treatment apparatus according to the present invention, The inlet 52 of the primary treated water inflow pipe 50 for introducing the primary treated water passing through the pretreatment tank 10 to the side of the filtration treatment tank 20 is located at a predetermined distance from the bottom of the filtration treatment tank 20 .

The mesh screen 110 installed in the pretreatment tank 10 may be a three-dimensional structure having a constant volume composed of screen nets. In this case, the size of the mesh screen nets is not limited to a specific numerical value, It is appropriate that the coarse floats and so on are filtered out and the fine particles of solid matter can pass with the rain.

The contaminant collecting net 110 installed in the pretreatment tank 10 can collect the contaminants introduced into the pretreatment tank 10 through the inflow pipe 100 together with the water to be treated with the coarse contaminants such as vinyl, . And sediments having a specific gravity larger than that of water, such as sand or soil, are separated from the primary treatment water flowing into the filtration tank by sinking to the bottom of the pretreatment tank 10 by natural sedimentation.

Here, the pretreatment tank 10 can be used as a storage tank when it is interlocked with a facility for reusing rainwater.

In the filtration treatment tank 20, the filtration layer 210 is formed to have a certain thickness by the spherical granular media 212. In the lower part of the filtration layer 210, a water collecting layer 230 is formed by a plurality of collecting devices 232. The water collecting layer 230 composed of the water collecting devices 232 supports the filtration layer 210 constituted of the granular filter media and functions for the even distribution of the collected water and the backwash water.

The water collecting device 232 constituting the water collecting layer 230 may be a known water collecting device through Korean Patent Registration No. 1435017 (published on Apr. 2014 08), but is not limited thereto, And may include any known type of collecting device that supports the filter media and has the function of collecting the filtered treated water and evenly distributing the backwash water.

The primary treatment water inflow pipe 50 is elongated from the pretreatment tank 10 to the upper part of the filtration layer 210. The inlet 52 of the pre- And a water hole 54 is formed at a predetermined interval in the primary treated water inflow pipe 50 located above the filtration layer 210. In this case, (Not shown) is provided in the water supply hole 54.

And the contaminants having a small particle size that are not filtered by the pretreatment are filtered by the through holes or the mesh formed around the inlet 52. The filter medium in the water hole 54 is partially washed with washing water, It is possible to reduce the cost of replenishment due to the filter medium loss by preventing the filter from being backflowed to the outside.

The primary treatment water that has passed through the pretreatment tank 10 through the primary treatment water inflow pipe 50 flows from the upper portion of the filtration layer 210 and the filtration layer 210 composed of the particulate media 212, Through a downflow filtration that passes from top to bottom, to the water-collecting layer 230 below the filtration layer 210.

The fine solids contained in the primary treatment water subjected to the pretreatment by the downflow filtration through the filtration layer 210 are adsorbed on the granular filter media 212 and filtered and the final purified water filtered through the fine solids Is collected in the water collecting layer 230 and is moved to the treatment water tank 30 along the water channel 240 formed at one side of the bottom of the filtration treatment tank 20.

Although not shown, the filtration layer 210 constituting the filtration treatment tank 20 may be provided in a form separated into a lower filtration layer and an upper filtration layer. In this case, by changing the particle diameter and the specific gravity of the granular filtration media 212 constituting the lower filtration layer and the upper filtration layer, it is possible to prevent the early clogging of the granular filtration media 212 constituting the filtration layer 210, Can be maximized.

If the particle size of the granular media of the lower filtration layer is smaller than the granular media size of the upper filtration layer, the filtration efficiency can be further improved. When the filtration layer 210 is divided into two layers, And the lower filtration layer 210 may be provided with a perforated plate so as to prevent the inter-layer movement and the outflow of the particulate media 212.

The water collecting layer 230 may be constructed in such a manner that a plurality of the water collecting devices 232 described above are connected to each other horizontally and vertically in accordance with the plane area of the filtering treatment tank 20, The water channel 240 is formed at a predetermined depth in the left and right width direction of the filtration treatment tank 20 and the air header pipe 250 to be described later is piped to the water channel 240, ).

The washing water and the air supplied through the water channel 240 and the air header pipe 250 after the inflow of the water to be treated are sprayed to the filtration layer 210 through the water collecting device at a predetermined pressure and a uniform distribution, The filtration layer 210 is disturbed and adsorbed on the particulate filter medium 212 in the filtration process or the contaminants existing between the particulate filter media 212 are desorbed and discharged from the filtration treatment vessel 20 (see backwash process to be described later).

6 and 7, the filtration treatment tank 20 is divided into two or more areas by at least one partition 270a-270c formed at a lower height than the primary treatment water inlet pipe 50 In this case, the cleaning load can be reduced by sequentially backwashing by area, so that a more economical and efficient cleaning can be performed without increasing the capacity of the pump or the blower.

The treatment water tank 30 is separated from the filtration treatment tank 20 through the second partition 25 formed between the filtration treatment tank 20 and the treatment water pipe 242 (Not shown). Accordingly, the final treated water filtered through the filtration layer 210 and passing through the micro-solids can be introduced into the treatment water tank 30 through the treatment water pipe 242.

An outflow pipe 300 for the external discharge of the treated water is connected to a certain height of one side wall of the treatment water tank 30 and thus the treated water flowing into the treatment water tank 30 through the treatment water pipe 242 is discharged The water is temporarily stored in the water tank 30 and reaches a predetermined water level (height at which the outflow pipe 300 is located), and is discharged to the outside of the treatment water tank 30 through the outflow pipe 300, And discharged.

The machine room 40 is equipped with a backwash pump 410 and an air blower 420 for supplying wash water and air to the filtration layer 210 in an airtight space. The backwash pump 410 is installed in the middle of the reverse water introduction pipe 412 connecting the water channel 240 and the treatment water tank 30 and the air blower 420 is connected to the air header pipe (250) and the air introduction pipe (422).

The branch pipes 252 are connected to the air header pipe 250 at predetermined intervals and the branch pipes 252 are laid on the bottom of the filtration treatment vessel 20 to collect the water in the water collecting apparatus columns constituting the water collecting unit 230 The water generated by the air blower 420 can be uniformly distributed throughout the water collecting unit by extending the outward water collecting device (water collecting device located above the water channel 240) one by one.

Accordingly, when the air blower 420 is driven together with the residual water removal of the pre-treatment tank 10 through the drain pump 130 after the inflow of the object water to be treated, the air for backwashing flows through the air introduction pipe 422, The water is uniformly distributed to the respective water collecting devices through the header pipe 250 and the branch pipe 252 and is sprayed to the filtration layer 210 through the water collecting device at a predetermined pressure to disturb the particulate filter media ).

The backwash pump 410 is driven with the above-mentioned first backwash termination using air and draws the treated water stored in the treatment water tank 30 into the filtration treatment tank to clean the filtration layer 210 again See the second backwash). The treated water functions to be used as wash water. At this time, the backwash pump 410 may be a general pump installed on the ground or a submersible pump that can be driven in water.

When the backwash pump 410 is driven for backwashing, the backwash pump 410 is supplied to the waterway 240 through the treated water tank wash water introduction pipe 412 stored in the treatment water tank 30, So that the particulate filter media 212 constituting the filtration layer 210 are disturbed to adhere to the particulate filter media surface or to remove the particulate filter material sandwiched between the particulate filter media .

Although the air blower 420 and the backwash pump 410 are disposed in the machine room 40, the air blower 420 and the backwash pump 410 are not limited thereto. The backwash pump 410 may be disposed on the bottom side of the treatment water tank 30 when the submerged pump is used as the backwash pump 410. [

2, reference numeral 432 denotes a filtration tank discharge pipe connecting the water channel 240 of the filtration treatment tank 20 and the pretreatment tank 10. When the washing (backwashing) of the filtration layer 210 is completed, And discharges the remaining water remaining in the filtration treatment tank 20 after the final cleaning to the pretreatment tank 10 and has a gradient toward the pretreatment tank 10 in the filtration treatment tank 20.

The reference numerals V1, V2 and V3 denote control valves which are installed between the treatment water pipe 242, the reverse water introduction pipe 412 and the air introduction pipe 422 to control the passage of the pipe concerned, The control valves V2 and V3 provided in the reverse water introduction pipe 412 and the air introduction pipe 422 are opened only during backwashing.

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 when water treatment is performed. do. Hereinafter, in describing the operation of the present invention, the rainwater will be described as an object to be treated.

As shown in FIG. 8, the water treatment performed through the present invention can be roughly classified into a coarse particle having a specific gravity smaller than that of water such as vinyl, can, and styrofoam, and a pretreatment for separating and removing contaminants having a specific gravity larger than that of water, And a filtration process for filtering fine contaminants mixed with rainwater through downflow filtration using the granular filtration media 212.

9, when the rainwater flows into the pre-treatment tank 10 through the inflow pipe 100, the coarse material having a specific gravity smaller than that of water among the impurities contained in the rainwater is caught by the trapping net 110 And sediments such as sand or soil which have passed through the scum trap net have a larger specific gravity than water and are separated from the rainwater by natural sedimentation to the bottom of the pretreatment tank (10).

The sludge or the like that has settled on the bottom of the pretreatment tank 10 is discharged to the outside of the water treatment apparatus within a predetermined time after the end of the rain through the pipeline 132 by driving the drain pump 130 and the water level of the rainwater from which the sludge and coarse contaminants are removed (The height of the outlet of the primary treated water inflow pipe 50), it flows into the filtration treatment tank 20 naturally from the pretreatment tank 10 through the primary treated water inflow pipe 50.

The primary treated water flowing into the filtration treatment tank 20 passes through the filtration layer 210 from the top to the bottom. At this time, in passing through the filtration layer 210, The filter media 212 are adsorbed or separated from the primary treatment water channel 240 by being sandwiched between the granular media 212 and the final treated water from which the fine solids are separated are separated from the water retaining layer 230 below the filtration layer 210 Gathered.

The treated water collected in the water collecting layer 230 is transferred to the water channel 240 formed at the bottom of the filtration treatment tank 20 on the lower side of the water collecting layer 230 and is discharged to the treated water pipe passing through the water channel 240 and the machine room 40 242 to the treatment water tank 30 and stored. When the water level of the stored treatment water reaches a certain level, the water is naturally discharged to a water system such as a reservoir or a river through an outflow pipe 300 connected to the sidewall of the treatment water tank 30.

As the filtration treatment through the filtration treatment tank 20 is continued, the filtration layer 210 is occluded due to the fine contaminants adsorbed on the particulate media 212, and the filtration flow rate is changed, and the throughput is rapidly lowered. Therefore, when the rainfall is terminated, filtration performance needs to be restored by washing (backwashing) the surface of the particulate filter medium 212 of the filtration layer 210 or the fine contaminants present between the particulate filter media.

The cleaning of the filtration layer will be described later with reference to Figs. 10 to 12. Fig.

FIG. 10 is a flow chart of the filtration layer back-up process through the filtration-type treatment device for rainwater, wastewater, and rainwater according to the present invention, and FIGS. 11 to 12 are operational state diagrams of the present invention when the filtration layer is reversed.

Referring to FIGS. 10 and 11, the backwashing step includes a first backwash using air, a second backwash using air as the backwash water and a final washing water stored in the treatment water tank 30 together with air, And a third backwash for stopping the air injection and discharging the contaminants above the filtration layer to the pretreatment tank through the first treatment water inflow pipe using only the treated water stored in the treatment water tank.

In the first backwash, the air blower 420 is driven with the end of inflow of rainwater, and the backwashing air is sprayed to the filtration layer 210 at a predetermined pressure to disturb the filtration layer 210 and to remove contaminants from the particulate media 212 Is performed.

At this time, the air having the predetermined pressure generated by the air blower 420 is supplied to the air header pipe 250 through the air introduction pipe 422 and is directed toward the filtration layer 210 at a predetermined pressure through the water collecting device 232 Can be injected into the distribution

After the first backwash is completed for a predetermined time, the backwash pump 410 is driven together with the air blower 420 to perform the second backwash for the filtration layer 210. That is, together with the end of the first backwash for a predetermined time, the air and the treated water stored in the treatment water tank 30 are used together to disturb the filtration layer 210 again to thereby desorb the contaminants, .

In the second backwash, the treated water stored in the treatment tank 30 is supplied to the water channel 240 via the backwash water introduction pipe 412 by driving the backwash pump 410, Is uniformly sprayed at a predetermined pressure together with the air toward the filtration layer 210 through the water collecting device of the filtration unit 210, thereby disturbing the filtration layer 210 once again, thereby removing the contaminants and discharging the contaminants.

During the second backwashing operation, the drain pump 130 is driven to generate a water level difference between the pretreatment tank 10 and the filtration treatment tank 20. Accordingly, the water level of the filtration treatment tank 20 (Treated water) used for the backwash is moved back to the pre-treatment tank 10 through the primary treated water inflow pipe 50, and the waste water (130).

In the third backwash, the air jetting is stopped, and only the treated water stored in the treatment water tank 30 is used to clean the upper portion of the filtration layer 210 generated during the first and second backwashes through the primary treatment water inflow pipe 50 And then discharged to the tank 10 is performed.

That is, in the third backwash, the treated water is introduced to raise the water level in the filtration treatment tank 20, whereby the contaminants on the filtration layer 210 formed during the backwashing of the filtration layer through the first and second backwashes The waste water can be discharged to the pretreatment tank 10 through the primary treated water inflow pipe 50 and discharged out of the treatment tank through the drain pump 130.

On the other hand, when the backwashing over the first, second, and third stages is completed, the filtrate discharge pipe 432 is opened as shown in FIG. 12 so that the stagnant stagnant water can be moved to the pretreatment tank 10 side in the filtration treatment tank 20 . In this process, the level of the stagnant washing water in the filtration treatment tank 20 is lowered, and the filtration layer 210 is once again disturbed and washed by the flow passing through the filtration layer 210 from top to bottom.

For efficient backwashing, it is preferable to construct the system so that the first, second, and third backwashes are successively performed as described above. However, the present invention is not limited to this, but a single backwash using only one backwashing method selected from the first to third backwashes The backwash may be performed by various methods such as a combination backwash which selects two or more and backwash is performed through a combination that can be implemented by the selection.

On the other hand, after the stagnant water in the filtration treatment tank 20 is discharged as described above and the washing water stored in the pretreatment tank 10 is discharged to the outside, the inside of the treatment tank is maintained in a dry state for a certain period of time, Avoid pests.

According to the embodiment of the present invention as described above, it is possible to more efficiently filter and discharge pollutants mixed with the water to be treated through the downflow filtration method using the granular filter media, and to recover the filtration performance through the backwash And it is possible to continuously perform the treatment, and the efficiency of the high filtration treatment can be continuously maintained even in the subsequent treatment.

Further, since a mixture of air and water is used for backwashing, uniform and efficient backwashing is possible over the floating filter media constituting the filtration layer, and therefore, the filtration duration can be increased and the filtration water quality can be improved, (Tap water) is drawn from the outside and used for backwashing water, it is advantageous from the viewpoint of economical efficiency because the maintenance cost is greatly reduced as compared with the method of backwashing the water.

Furthermore, since pretreatment such as sediment filtration in the sedimentation method is carried out prior to the full-scale filtration treatment, the filtration load on the filtration layer in the full-scale filtration treatment can be extremely reduced, and therefore, the high-quality filtration treatment state can be maintained for a long time And it is also advantageous in that it can disturb the filter medium with less energy at the time of backwashing so that the pollutant can be desorbed and discharged.

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.

10: Pretreatment tank 15: First partition
20: Filtration treatment tank 25: Second partition
30: water treatment tank 35: third partition
40: machine room 50: primary treatment water inlet pipe
100: inlet pipe 110:
130: drainage pump 140: piping
150: Entrance 210: Filter layer
212: granular filter media 220a: upper porous plate
220b: lower perforated plate 230:
240: channel 242: process water pipe
250: air header tube 252: branch tube
270: Separation barrier 410: backwash pump
412: reverse water introduction pipe 420: air blower
422: air introduction pipe 432: filtration tank discharge pipe

Claims (11)

delete As a three-dimensional structure to be buried underground for wastewater treatment,
A sewage collection network for removing contaminants contained in the treatment water flowing through the inflow pipe is installed and a pretreatment including a drainage pump for discharging residual water and backwash water and a pretreatment article;
A plurality of water collecting devices arranged under the filtration layer for collecting the filtration treated water while passing through the filtration layer or for equal distribution of backwash water during backwashing, Wherein the primary solid water contained in the primary treatment water is filtered by a downflow filtration through which the primary treatment water is supplied through the primary filtration layer through the primary treatment water inlet pipe and through the filtration layer, A filtration treatment tank configured to be treated;
A treatment water tank in which a treated water having been filtered through the filtering treatment tank is stored and an outlet pipe is connected to a predetermined height so that the stored treated water reaches a predetermined water level; And
And a mechanical chamber in which a backwash pump and an air blower are installed to supply water and air for washing the filtration layer, respectively, separated from the filtration treatment tank and the treatment water tank,
A water channel is formed on one side of the bottom of the filter layer in the bottom of the water collecting layer, an air header pipe connected to the air blower is installed in the water channel,
Wherein the water channel is connected to the treatment water tank so as to receive treatment water from the treatment water tank through a reverse water introduction pipe through the machine room, the backwash pump is installed in the reverse water introduction pipe in the machine room,
Wherein the filtration treatment tank is partitioned into two or more treatment spaces by at least one partition wall formed at a lower height than the primary treatment water inflow pipe,
And a filtration tank discharge pipe extending from the water channel and connected to the pre-treatment tank through the first partition wall.

delete 3. The method of claim 2,
Wherein the filtration layer is divided into a lower filtration layer and an upper filtration layer,
Wherein the grain size of the granular media of the lower filtration layer is smaller than that of the upper filtration layer.
3. The method of claim 2,
Wherein the water channel is connected to the treatment water tank through a treatment water pipe passing through the machine room.
3. The method of claim 2,
The primary treatment water inflow pipe extends from the pretreatment tank and is disposed over the filter layer,
Wherein a water supply hole is formed in the primary treatment water inflow pipe above the filtration layer at a predetermined interval and an oil supply and discharge net is installed in each water supply hole.
delete delete delete delete delete
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101917632B1 (en) * 2018-04-27 2018-11-13 주식회사 송림 water treatment media and manufacturing method thereof and treatment apparatus for non-point source contaminant
KR101932402B1 (en) * 2018-03-29 2018-12-31 케이원에코텍 주식회사 Water Treatment System

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Publication number Priority date Publication date Assignee Title
KR100951098B1 (en) * 2009-10-06 2010-04-07 (주)신우이앤씨 Apparatus for filtering nonpoint source pollutants using a cartrage filter
KR101150675B1 (en) * 2011-09-20 2012-05-25 신지훈 The constant filtration system which has a backwash-water and the filtration method
KR101511967B1 (en) * 2014-08-27 2015-04-14 (주) 디아이엔바이로 Water treatment apparatus and Water treatment methods using the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100951098B1 (en) * 2009-10-06 2010-04-07 (주)신우이앤씨 Apparatus for filtering nonpoint source pollutants using a cartrage filter
KR101150675B1 (en) * 2011-09-20 2012-05-25 신지훈 The constant filtration system which has a backwash-water and the filtration method
KR101511967B1 (en) * 2014-08-27 2015-04-14 (주) 디아이엔바이로 Water treatment apparatus and Water treatment methods using the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101932402B1 (en) * 2018-03-29 2018-12-31 케이원에코텍 주식회사 Water Treatment System
KR101917632B1 (en) * 2018-04-27 2018-11-13 주식회사 송림 water treatment media and manufacturing method thereof and treatment apparatus for non-point source contaminant

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