KR100987316B1 - Non-point source contaminant purification system of combining oil-water separation with upward movement filtration by using filter medium movable filter and non-point source contaminant purification thereby - Google Patents

Abstract

PURPOSE: In the most of the floatability nonpoint pollutant of the oil lamp is the separation of water from oil settling tank, it separates in initial from the superiority. Inflow to the clarification plant in which all kinds of the filters are installed conspicuously shrinks. CONSTITUTION: The nonpoint pollutant processing unit(2) of the Upward filtration complex method and separation of water from oil. In order to sift out the gasoline and the floatability adulteration quality included in the initial rain inflow water the separation of water from oil is included. With the first process bath in which the precipitate of the precipitability nonpoint pollutant is included.

Description

Non-point source contaminant purification system of combining oil-water separation with upward movement filtration by using filter medium movable filter and Non-point source contaminant purification}

The present invention relates to the treatment of non-point pollutants for preventing the deterioration of water pollution in rivers by collecting and purifying the inflow of contaminants on the surface by naturally occurring rainwater, and more particularly in the rainwater flowing from rainwater pipes. The present invention relates to a non-pollutant treatment technology for efficiently removing and collecting oil components and effectively removing suspended solids through upfiltration in a subsequent treatment tank to efficiently remove contaminants introduced through rainwater pipes.

Generally, pollutants include point pollutants emitted from well-defined and limited point sources, such as domestic sewage, industrial waste and livestock waste, and agricultural land in unspecified areas, grasslands, forests, construction sites, mines, logging sites, Discharge areas can be divided into nonpoint pollutants emitted from an unspecified and widespread nonpoint source, such as waste treatment plants, landfills, urban areas, roads and industrial sites.

In case of point pollutants with a clear discharge point among the pollutants, a separate purification device or wastewater treatment device is installed in homes, factories, livestock farms, etc., but some of the pollutants are purified. Not only is the discharge area wide, but also remains mostly on the surface of the earth, and it becomes the main cause of water pollution by entering the public water or groundwater such as rivers with the initial rainwater.

In addition, the non-point pollutants have a specific gravity higher than that of the rainwater compared to the specific gravity of the rainwater sedimentable non-point pollutant and the specific gravity is lower than the rainwater does not mix in the rainwater, floating on the upper portion such as oil strips or trees floating Non-point pollutants, soluble non-point pollutants dissolved in water, etc. are classified into rainwater, especially with initial rainwater, and may enter the public waters such as rivers or groundwater, causing pollution. It is important not to enter the groundwater directly.

On the other hand, the non-point pollutants have been reported to be able to treat more than about 80% of the total rainfall in the rainwater treatment facility capacity for about 20mm rainfall because it shows a relatively high pollution concentration in the initial rainwater runoff during rain.

That is, most pollutants are discharged at high concentrations within 1 hour during rainfall, so if the initial source of pollution is removed, the water quality of the stream can be effectively reduced.

Therefore, the economical and effective pollutant purification method for non-point pollutant purification in consideration of runoff characteristics during rainfall is economical because it is possible to reduce the size of the purification facility by separating and intensively purifying the initial rainwater with high pollution.

On the other hand, the most recent pollutants include cement or concrete pavement in roads, industrial and residential areas, and pollutants such as automobile dusts, automobile oils and unburned oils, rather than turbidity pollutants caused by soil particles. It does not penetrate and flows into rivers through rainwater pipelines, which has a great impact on river pollution.

Such contaminants are classified as hardly degradable contaminants that are difficult to be naturally purified by microorganisms and that their decomposition time takes tens to hundreds of times longer than naturally occurring contaminants.

Conventional non-point pollutant treatment technology includes horizontal screens to install fine screens to remove contaminants and to remove contaminants by passing through media such as various zeolites or activated carbons. Other conventional techniques include sand, There is a technique for forming a filter media layer such as activated carbon and zeolite so that rainwater flows through the filter media from the top to the bottom, or flows through the filter media layer from the bottom to the top.

However, these prior arts have a specific gravity of the filter medium larger than water, and the filter medium is filled in a fixed manner so that the filter layer is clogged by fine turbidity when rainwater flows in, and there are many difficulties in backwashing the filter medium.

On the other hand, the existing non-point pollutant device type treatment apparatus has a problem that it is difficult to work in a toxic gas or a narrow space because the workers have to deal with the pollutants after entering the manhole after a certain time. Therefore, there is an urgent need to devise a non-point pollutant treatment apparatus and method that allows for convenience and speedy maintenance.

The present invention is to solve the above-mentioned problems, and in order to efficiently clean the non-point pollutants contained in the initial rainwater through a multi-stage treatment, in particular, before separating the floating non-point pollutants including oil into the filtration apparatus, The purpose of the present invention is to provide a non-point contaminant treatment apparatus and a purification method for improving the performance of the purification apparatus and extending the life of the filter by purifying by an upward filtration method using flowable media.

In addition, the present invention prevents the clogging of the filter media due to the concentration and accumulation of fine turbidity, to easily remove the contaminants by the operator during maintenance, and to easily remove the micro-contaminant deposited on the bottom, the convenience of washing the filter The purpose of the present invention is to provide a non-point pollutant treatment device and a purification method of oil-water separation and up-filtration complex method that can increase the flow rate.

In order to achieve the above object, the present invention, the first treatment tank is made of sedimentation of the sedimentary non-point pollutant and the oil and water is separated to filter the oil and floating contaminants contained in the initial rainfall influent; The non-point pollutant of the oil-water separation and up-filtration complex method, characterized in that it comprises a second treatment tank to allow the fine turbidity material to precipitate by natural sedimentation while the influent flowing through the first treatment tank flows from the lower part of the filter to the upper part. A processing device is provided.

On the other hand, according to another aspect of the present invention for achieving the above object, the step of separating the floating non-point pollutants, such as oil contained in the initial rainwater while precipitating the precipitated non-point pollutants contained in the initial rainwater; Reducing the flow rate of the oil-water separated rainwater; Non-point contaminant treatment of oil and water separation and upfiltration, characterized in that it comprises the step of flowing rainwater upward from the bottom of the filter medium filter to precipitate fine turbidity material by natural sedimentation due to the impact of the filter medium A method is provided.

The effects of the present invention are as follows.

In the non-point pollutant treatment device for the initial rainwater of the present invention, as most of the floating nonpoint pollutants such as oil are initially separated from the rainwater in the oil-water separation sedimentation tank, the inflow to the purification device equipped with various filters is drastically reduced. The fine turbidity material of the oil-separated rainwater moves upward and is settled by collision and interference with the media of the media flow filter, which is very effective for improving the performance of the non-point pollutant treatment device and extending the life of the filter.

In addition, the present invention purifies the initial rainwater through the complex multi-stage treatment combined with oil-water separation and up-filtration, while the filter is replaceable, easy to maintain, and effectively cleans the non-point pollutants introduced with rainwater, rivers, appeals In addition to preventing water pollution in public waters and groundwater such as this, it provides a non-point pollutant treatment device for a very useful and effective initial rainwater that can protect the natural ecosystem.

1 is a partial cutaway perspective view of a non-point pollutant reducing apparatus according to an embodiment of the present invention
2 is a cross-sectional view of the non-point pollutant reducing device shown in FIG.
Figure 3 is a reference diagram illustrating the excellent flow path in the non-point pollutant reducing apparatus of the present invention
Figure 4 is a reference diagram illustrating the oil-water separation action in the non-point pollutant reduction device of the present invention
5 is a cross-sectional view of a non-point pollutant reducing apparatus according to a second embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings of FIGS. 1 to 5.

Prior to the description of each embodiment of the present invention, non-point contaminants are divided into sedimentary nonpoint contaminants, suspended nonpoint contaminants, and soluble nonpoint contaminants, all of which are heavy metals, pathogenic microorganisms, organic compounds, radioactive substances, toxic substances and other substances. It is assumed that it can contain a wide variety of things, such as contaminants and suspended solids.

Example 1

1 to 4, the non-point pollutant treatment apparatus according to the first embodiment of the present invention, the oil-water separation to filter the oil and floating impurities contained in the initial rainfall inflow water and sedimentary non-point pollution A first treatment tank in which the material is precipitated, a second treatment tank allowing the fine turbidity material to precipitate by natural sedimentation while the inflow water passing through the first treatment tank flows from the lower part of the filter to the upper part, and the first treatment tank and the second treatment tank. It is formed on the boundary surface to distinguish the tank, and formed by a predetermined height upward from the bottom surface comprises a partition 4 to reduce the flow rate of rainwater flowing into the second treatment tank from the first treatment tank.

At this time, the first treatment tank, the oil and water separation sedimentation tank (1) for precipitating the sedimentary non-point pollutant contained in the initial rainwater flowing through the rainwater inlet pipe 12 and the rainwater inlet pipe 12 Oil and water separation plate (2) installed in the upper space of the oil and water separation sedimentation tank (1) to isolate suspended non-point pollutants such as oil contained in the initial rainwater in the oil and water sedimentation sedimentation tank (1), and the rainwater inlet pipe ( 12) passing through the oil-separation sedimentation tank (1) includes a fine screen (3) provided to filter out the floating non-point pollutants contained in the rainwater.

The second treatment tank is formed from the partition 4 to form a downward flow passage of rainwater introduced from the first treatment tank, but has a first support having a structure in which the lower part is opened so that the rainwater moves to a space below the upward filtration filter. The wall 5, the second support wall 7 formed at a predetermined height upward from the bottom at a position spaced a predetermined distance from the first support wall 5, and the first support wall 5 and the second support It comprises a filter medium movable type filter (6) provided between the walls (7), and a nonwoven fabric (14) with activated carbon attached to the upper portion of the filter medium (6).

On the other hand, the second support tank is a third support which is installed in the same shape as the first support wall 5 at a position spaced apart from the second support wall 7 so that the rainwater passing through the filter medium flow filter 6 moves downward. To the wall 8, the filter medium floating filter 9b installed between the second support wall 7 and the third support wall 8, and the rainwater discharge pipe 11 of rainwater that has passed through the filter. It may further include a sump (10) for the final settling of the sediment contaminant prior to discharge.

On the other hand, the filter medium introduced into the filter medium filter 6 is preferably spherical, preferably made of a resin material such as polypropylene, but is not limited thereto. In addition, zeolite or activated carbon is preferably applied as the filter material filled in the filter medium filter 9b.

On the other hand, the fine screen (3) is a screen with a thin eye to primarily filter out the bulky floating contaminants such as styrofoam or wood chips.

In addition, the filter medium filter (9b) is to filter out the floating non-point pollutant and soluble non-point pollutant contained in the rainwater, the particulate zeolite is filled inside the mesh having a predetermined size of the mesh as a filter, Voids are formed between the particles of the media and the particles.

The filter medium flow filter 6 and filter medium floating filter 9b are disposed between the first support wall 5 and the second support wall 7, and the second support wall 7 and the third support wall 8. It is placed on the lattice holder installed between) and each unit filter is exchangeable.

The fine screen (3), oil-water separation sedimentation tank (1), oil-water separation plate (2), partition wall (4), filter media filter (6), filter media filter (9b), non-woven fabric with activated carbon (14) ), The first to third supporting walls and the like are installed inside the box-shaped housing H having the manholes 13a and 13b on which the manhole covers are installed.

Meanwhile, the manholes 13a and 13b, which are access ports for work, are separately formed in the first treatment tank region and the second treatment tank region, respectively, so as to improve access to the first treatment tank and the second treatment tank.

Initial rainwater purification in the initial rainwater purification facility of the present invention configured as described above is as follows.

When the rain falls, the sedimentary / floating non-point pollutants adhered to the ground with the initial rainwater move along the ground and enter the separation manhole (not shown) through the collecting pipe (not shown), and the separation manhole (not shown) The initial rainwater that enters into the non-point pollutant treatment device of the present invention along the inlet pipe 12.

The sedimentation well nonpoint pollutants in the nonpoint pollutants included in the initial rainwater flowing into the nonpoint pollutant treatment device of the present invention are sedimented and separated from the oil / water separation sedimentation tank 1 by their own weight. The fine screen (3) installed at the outlet side of the rainwater inlet pipe (12) of the) to filter out bulky floating nonpoint pollutants such as styrofoam or wood chips.

Then, some of the initial rainwater flowing into the box-shaped housing (H) through the rainwater inlet pipe 12 hits the oil / water separator plate (2) and then falls into the oil-water separation sedimentation tank (1).

Rainwater flowing into the box-shaped housing (H) is initially filled with the oil-separation sedimentation tank (1), the water level is increased, floating non-point pollution contained in the rainwater flowing into the oil-water separation sedimentation tank (1) during the water level rise The material remains mostly in the region before the oil / water separator plate 2 of the oil / water separator sedimentation tank 1 by the eddy motion of rainwater according to the geometric characteristics of the inclined surface 200 at the bottom of the oil / water separator plate 2.

Accordingly, the floating non-pointed pollutants such as oil are mostly located in an isolated state in front of the oil / water separator 2 when the water level rises above the lower portion of the oil / water separator 2 (the 'A' position in the drawing). After that, as long as the water level is maintained by the rainwater flowing in continuously, floating nonpoint pollutants such as oil contained in the rainwater continue to be segregated and accumulated in front of the oil / water separator 2.

On the other hand, if the water level rises sufficiently and becomes higher than the height of the partition 4 ('B' position in the drawing), the rainwater flows into the space below the media 4 flow filter 6 constituting the second treatment tank beyond the partition 4. do.

If the water level of rainwater flowing into the space on the lower side of the filter fluid filter 6 is continuously increased by this process, the storm water is moved from the lower part to the upper part through the filter medium filter 6, and in the process, the fluid filter medium is flowed. The micro turbidity contaminants settle down due to the interference and collision action of.

Then, the rainwater passing through the filter medium filter 6 passes through the nonwoven fabric 14 treated so that the activated carbon is attached on the surface, and in this process, the oil component and the fine turbidity contaminant are filtered again.

The rainwater passing through the nonwoven fabric 14 to which the activated carbon is attached passes through the filter medium-type filter 9b installed on the flow path between the second support wall 7 and the third support wall 8, wherein the filter medium Soluble non-point contaminants among the non-point contaminants contained in rainwater by the action of zeolite or activated carbon filled in the floating filter 9b are adsorbed to the zeolite or activated carbon charged in the net.

For reference, zeolite has high hydrophilicity and excellent ability to adsorb water molecules without damaging crystal structure. There are natural zeolite produced naturally from rock or clay and artificial zeolite made artificially. It is used for the removal of ammonia nitrogen and heavy metals. In addition, activated carbon is used to strongly adsorb harmful chemicals contained in rainwater to safely purify water.

On the other hand, the rainwater that has undergone filtration in the filter medium-type filter 9b is collected in the water collecting well 10 installed at the lower portion thereof, and the rainwater collected in the water collecting well 10 is discharged as the water level increases. Is discharged through).

At this time, the sump (10) also serves as a final precipitation site for the precipitated non-point pollutant contained in the rainwater.

The non-point contaminant treatment device of the present invention that acts as described above cartridges the filter medium filter (6) and the filter medium floating filter (9b), so that the replacement operation of the filter device can be safely and easily performed according to the purification system. Can improve the maintenance efficiency.

That is, the filter medium flow filter (6) is a filtration device which is filled only within the range of 70 to 90% so that the spherical filter medium made of polypropylene can flow the free space inside the outer case having a mesh as a stainless steel material, and the filter medium floating type The filter 9b is a well-known filtration device filled with zeolite or activated carbon, both of which are factory-manufactured in the form of cartridges, and in the case of replacement, the filter 9b is simply removed by inserting each installed filter and inserting a new filter. In comparison, the size is reduced and the weight is reduced enough to be handled by one worker, so that replacement work for maintenance can be performed very easily.

In particular, the filter medium filter (6) is able to maximize the maintenance efficiency as the micro-contaminants accumulated in the filter material is naturally washed in accordance with the continuous storm generation.

As described above, the present invention is economical because the size of the purification device can be reduced because the initial rainwater having high pollution degree is separated and intensively purified in consideration of the outflow characteristics during rainfall, and the floating boiling point including oil introduced into the initial rainwater The contaminants are separated from the rainwater at the beginning of the inflow into the purifier, and then the oil-separated rainwater takes the upward filtration which is filtered while moving the filter fluid filter 6 from bottom to top. It can effectively prevent clogging, so that the function of the non-point pollutant treatment device can be continuously maintained, thereby maximizing the maintenance efficiency of the device.

Example 2

5 is a cross-sectional view of a non-point pollutant reducing apparatus according to a second embodiment of the present invention, and the basic configuration of the non-point pollutant treatment apparatus according to the present embodiment is the same as that of [Example 1], except that the filter medium filter 6 The difference is that a non-woven fabric 14 having activated carbon attached to the upper and lower portions of the filter medium-type filter 9a is provided, and the filter medium-type filter 9a is provided above. At this time, zeolite or activated carbon may be filled in the filter medium filter 9a as a filter medium, and the nonwoven fabric 14 may be installed only on the upper or lower portion of the filter medium filter 9a.

Therefore, according to the present embodiment, a composite filter device is constructed, because it is treated by the combination of the filter medium flow filter 6 and the filter medium floating filter 9a thereon for the upward flow rainwater.

When configured in this way, the present embodiment, in addition to the action of the basic filter flow filter 6, the filter action and the nonwoven fabric 14 for the soluble non-point pollutants of the floating filter filled inside the floating filter 9a, 9b. Finally, the final oil component adsorption can be achieved, thereby further improving the purification performance of the non-point pollutant treatment device.

On the other hand, the separation and isolation of oil and rainwater due to the action of the oil and water separation plate (2) and the action according to the configuration of the other filter medium flow filter (6) is made of the same as in the above-described [Example 1] .

And, in the above embodiments, after the installation of the non-point pollutant treatment device is completed, if the clean water is filled more than the bottom position ('A' position on the drawing) of the oil-water separator 2, the inflow with the initial rainwater Since floating non-point pollutants such as oil are stacked in front of the oil and water separation plate 2 from the beginning, the purification performance of the non-point pollutant treatment device can be further improved.

The present invention is not limited to the above-described embodiments, and variations and modifications may be made in various forms without departing from the scope of the technical spirit of the present invention. Accordingly, the rights of the present invention are not limited to the embodiments described above, but are defined by what is stated in the claims, and those skilled in the art can make various modifications and adaptations within the scope of the claims. It is self evident.

The present invention is economical because it is possible to reduce the scale of the purification device because the first rainwater with high pollution is separated and intensively purified in consideration of the runoff characteristic during rainfall.

In particular, the present invention can effectively separate the floating non-point pollutants such as oil in the purification of the initial rainwater to prevent water pollution of public water such as rivers, lakes, and groundwater, and thus industrial availability is very high.

H: housing 1: oil separation sedimentation tank
2: oil / water separator 200: inclined surface
3: detail screen 4: bulkhead
5: 1st support wall 6: media flow type filter
7: second support wall 8: third support wall
9a, 9b: media floating filter 10: sump
11: outlet pipe 12: rainwater inlet pipe
13a, 13b: manhole 14: nonwoven fabric with activated carbon

Claims (8)

A first treatment tank in which oil-water separation is performed to filter out oil and suspended contaminants contained in the initial rainfall influent, and precipitation of sedimentary nonpoint pollutants is performed;
And a second treatment tank for allowing fine turbidity material to precipitate due to natural sedimentation while the inflow water passing through the first treatment tank flows from the lower part of the filter to the upper part,
Between the first treatment tank and the second treatment tank, formed in the interface to separate the first treatment tank and the second treatment tank is formed in a certain height upward from the bottom surface flowing into the second treatment tank from the first treatment tank Non-point pollutant treatment apparatus of oil-water separation and upward filtration combined method characterized in that the partition is provided to reduce the flow rate of. The method of claim 1,
The first treatment tank,
An oil-separation sedimentation tank for precipitating sedimentary nonpoint pollutants contained in the initial rainwater flowing through the rainwater inlet pipe,
An oil / water separator plate installed in the upper space of the oil-separation sedimentation tank to isolate floating non-point pollutants such as oil contained in the initial rainwater introduced through the rainwater inlet sedimentation tank;
Non-point pollutant treatment of oil and water separation and upward filtration complex method comprising a fine screen that is provided to filter the floating non-point pollutant contained in the rainwater flowing through the rainwater inlet pipe flowing into the sewage sedimentation tank Device. The method of claim 1,
The second treatment tank,
A first support wall having a structure formed at a distance from the partition to form a downward flow passage of rainwater introduced from the first treatment tank, the lower part of which is opened so that the rainwater moves to a space below the upward filtration filter;
A second support wall formed at a predetermined height upward from a bottom surface at a position spaced apart from the first support wall by a predetermined distance;
A filter medium movable type filter installed between the first support wall and the second support wall;
Non-point pollutant treatment apparatus of oil and water separation and upward filtration composite method characterized in that it comprises a non-woven fabric attached to the activated carbon is installed on the filter medium flow filter. The method of claim 3, wherein
The second treatment tank,
A third support wall installed in the same shape as the first support wall at a position spaced apart from the second support wall so that the rainwater passing through the filter medium flow filter moves downward;
A filter medium floating filter installed between the second support wall and the third support wall;
An oil-water separation and up-filtration complex type boiling point contaminant treatment apparatus further comprising a sump to allow the final precipitation of the sedimentary contaminants prior to discharge to the rainwater excellent discharge pipe passing through the filter. delete delete delete delete

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