KR100450486B1 - Device for filtering rainwater consisting of non-woven fabric layer, sponge layer and regenerated waste tire filter media layer and wastewater reclamation and reusing system by using the same - Google Patents

Abstract

PURPOSE: To provide a device for filtering rainwater and a wastewater reclamation and reusing system that is capable of removing turbidity components, microorganisms and bacteria from the water treated by the rainwater filtering device to produce recycled water adequate for water quality standards of the wastewater reclamation and reusing system. CONSTITUTION: The system comprises a water collection tank (2) where rainwater is collected through a water inlet path (1), a water pump (4) that is installed at the water collection tank, a storage tank (7) where the collected rain water is supplied through a check valve (6) of a transfer pipe (5) to be filtered by upwardly passing through a filter media consisting of a filter media layer, a non-woven fabric layer and a sponge layer and the filter media is downwardly back-washed through a backwash water discharge pipe (19) having a solenoid valve (20), a separation membrane treatment tank (11) where the rainwater that is overflown from the storage tank after having been passed through the filter media is collected, a submerged hollow fiber separation membrane (12) that is installed at the separation membrane treatment tank, a vacuum pump (15) that supplies the rain water passed through the separation membrane (12) through a filtered water transfer pipe (13) as a recycled water and a blower (17) that supplies air to the separation membrane (12) through an air pipe (18).

Description

Rainwater filtration system and heavy water treatment system using the same

The present invention relates to a rainwater filtration device as a base technology for reusing recycled rainwater into heavy water having a large amount of non-point source containing a wide range of nonpoint sources, and a water treatment system and method using the same.

Conventional techniques for filtering rainwater and rainfall are as follows.

Purification cartridge of Application No. 10-2003-0025867, filter medium consisting of expanded polypropylene of 20-2002-0017155, etc., proposed for filtration of conventionally discharged rainwater, high density polyethylene filtration membrane and filtration filter of 20-2002-0018434, 20 The filters provided in the sand and charcoal layers of 2002-0007163, the filter media of 20-2000-0079586 and the particulate filter of 20-2002-0017700 were primarily focused on the removal of suspended solids.

However, since rainwater contains various pollutants due to industrialization, and especially heavy metals and harmful organic substances, that is, organic carbon, it contains facilities such as landscaping water, cleaning water, and park water for maintenance even if the filter is used. There was a problem that can cause the risk of environmental pollution when used in.

In addition, as a method of purifying and reusing rainwater, the present technology includes re-use slag of neutralization function and re-use method using filter medium of filtration function, 20-2002-0017700 storage, collection, floatation blocking network and Recycling method using rain water purifier, sand layer of 20-2002-0007163, reusing method using filtration device of charcoal layer, reusing rainwater through 20-2002-0018434 high density polyethylene filtration membrane and filtration filter, and 20-20030020851 There is a method of using a clean excellent collection device using the collection and the non-woven filtering member of the prior art, such a conventional technique has a limited effect on the filtering or filtering of suspended solids which is a function that can generally have a variety of media in the filter device.

Some sources have proposed a mixture of media with adsorption and media with filtration, but rainwater or rainfall treated only with media with filtration and adsorption have high turbidity and can be a hygienic problem. Since bacteria and the like cannot be removed, there is a problem such as high risk of environmental pollution when reused in general water such as heavy water and landscaping water.

For this reason, not only suspended solids, heavy metals and organic substances, but also turbidity can be lowered, which can cause psychological effects, as well as microorganisms and germs that can be hygienic. There is an urgent need for a way to use water.

Technical problem to be achieved by the present invention is a non-woven fabric layer and sponge layer that can filter the suspended matter and turbidity of the rain water; A reclaimed waste tire filter material layer for absorbing and removing heavy metals and organic substances; It is composed of a system consisting of a filtration device consisting of a filtration device and an immersion hollow fiber membrane to remove the turbidity components, microorganisms and bacteria of the treated water collected from the filtration device to provide a method for producing recycled water that meets the water quality standards. It is for.

Another technical problem to be achieved by the present invention is to maintain backwashing with rainwater that has passed through the filter medium without requiring other power, thus making maintenance easy, and minimizing the flow that interferes with normal flow due to the upstream flow. This is to improve the treated water quality.

Technical problem to be achieved by the present invention is a sump collecting rainwater through the inlet; An underwater pump installed in the sump; Rainwater collected from the submersible pump is connected to the lower part and supplied through a check valve of the transfer pipe, and is filtered by an upward flow method that sequentially passes through a filter material consisting of a regenerated waste tire filter medium layer, a nonwoven fabric layer, and a sponge layer, and a solenoid A reservoir configured to generate a downflow for backwashing the filter medium through a backwash water discharge pipe having a valve; A membrane treatment tank for collecting rainwater flowing over the filter medium from the reservoir; Immersion hollow fiber membrane installed in the membrane treatment tank; A suction pump for providing rainwater that has passed through the submerged hollow fiber separator to the reuse water through a permeate transfer pipe in a state in which turbidity, microorganisms and bacteria are removed by filtration; A blower for supplying air to the immersion hollow fiber separator through an air pipe and cleaning the air; It is achieved by a filtration device consisting of the water treatment system consisting of the above and the reservoir used therein.

1 is a view showing a rainwater filtering device according to the present invention

Figure 2 is a view for explaining the structure of the filtering means used in the rainwater filtering device of the present invention

3 is a view showing a water treatment system of the present invention.

<Description of the code | symbol about the principal part of drawing>

1: inflow channel 2: water tank

4: Submersible pump 5: Transfer piping

6: check valve 7: reservoir

8a: porous plate 8b: recycled waste tire filter layer

8c: nonwoven fabric layer 8d: sponge layer

11: Separation membrane treatment tank 12: Immersion hollow fiber membrane

13: permeate feed pipe 14: vacuum pressure gauge

15: suction pump 17: blower

18: air piping 19: backwash water discharge piping

20: solenoid valve

Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing a filtration device of the present invention, Figure 2 is a view showing the configuration of the filter medium installed in the rainwater storage tank of the filtration device.

As shown in FIG. 2, the filter medium provided in the storage tank 7 of the present invention has the recycled waste tire filter layer 8b, the nonwoven fabric layer 8c, and the sponge layer 8d sequentially from the bottom by the porous plate 8a. To be deployed.

The porous plate 8a is formed with a plurality of through holes, the through hole is to act as a flow path of rainwater flowing into the reservoir (7), Figure 1 and Figure 2 shows the recycled waste tire media layer (8b), nonwoven fabric Although the structures provided on the upper and lower portions of the layer 8c and the sponge layer 8d are illustrated, respectively, the recycled waste tire filter layer 8b, the nonwoven fabric layer 8c, and the sponge layer 8d are stacked in order from the bottom, and the storage tank ( 7) It may be used in the present invention as long as it is a structure that can be disposed within or disposed in order from the bottom in a state where a gap is formed between the recycled waste tire media layer 8b, the nonwoven fabric layer 8c, and the sponge layer 8d. have.

The recycled waste tire filter material constituting the recycled waste tire filter material layer 8b is a spherical to elliptical shape having a diameter of 3 to 15 mm coated with activated carbon on the surface by extruding waste tire powder to filter turbidity and suspended matter in rainwater. In particular, it serves to adsorb and remove heavy metals and organics.

The nonwoven fabric layer 8c serves to remove fine suspended matter in the rainwater that has passed through the recycled waste tire filter layer 8b, and the sponge layer 8c passes through the nonwoven fabric layer 8d together with the final filtering function. It plays a role of minimizing the flow of rainwater through the entire flow of a rainwater.

As shown in FIG. 2, the filtration device of the present invention includes a storage tank 7 provided with a filter medium as described above, and is provided with a check valve 6 so that rain water flows into the lower portion of the filter medium, and a solenoid. The valve 20 is provided with a backwash water discharge pipe 19 which is used to clean the filter medium. Rainwater in the storage tank 7 passes through the non-woven fabric layer 8c and the sponge layer through the recycled waste filter medium layer 8b of the filter medium. It is an upstream filtration system passing 8d in order from bottom to top.

3 is a view showing a heavy water treatment system using the filtration device of the present invention, which is a collection tank (2) in which rainwater is collected through the inlet (1) as shown; An underwater pump (4) installed in the sump (2); Rainwater collected from the submersible pump 4 is connected to the lower part and supplied through the check valve 6 of the conveying pipe 5 so that the recycled waste tire media layer 8b, the nonwoven fabric layer 8c, and the sponge layer 8d are provided. A storage tank 7 which is filtered by an upward flow method sequentially passing through a filter medium consisting of a) and a downward flow for backwashing the filter medium through a backwash water discharge pipe 19 having a solenoid valve 20; A membrane treatment water tank 11 collecting rainwater flowing over the filter medium from the storage tank 7; An immersion type hollow fiber separator 12 installed in the separator treatment tank 11; A suction pump 15 which passes through the immersion hollow fiber membrane 12 and provides rainwater from which turbidity, microorganisms and bacteria have been removed, to the reused water through the permeate transfer pipe 13; Blower (17) for supplying air through the air pipe 18 to the immersion hollow fiber membrane (12) to clean;

A vacuum pressure gauge 14 is installed in the permeate feed pipe 13 to determine whether the immersion hollow fiber membrane 12 is normally operated by measuring the vacuum filtration pressure when the immersion hollow fiber membrane 12 is operated.

The immersion hollow fiber membrane 12 is a hollow yarn having a tensile strength of 35 ~ 40kgf / fil and a pore diameter of 0.4㎛ or less.

In the water treatment system using the filtration device of the present invention as described above, the rainwater collected in the water collecting tank 2 through the inflow channel 1 is pumped by the submersible motor 4, and the storage tank 7 through the transfer pipe 5. Supplied to.

The check valve 6 installed in the transfer pipe 5 serves to prevent the phenomenon of backflow from the reservoir 7 to the collection tank 2.

Rainwater in the storage tank 7 penetrates through the reclaimed waste tire filter media layer 8b, the nonwoven fabric layer 8c, and the sponge layer 8d in order when the water level rises due to the continuous operation of the submersible pump 4. In this process, it is purified by the filtration and adsorption function of the filter medium.

The rainwater filtered through the filter medium flows into the storage tank 7 and flows into the membrane treatment tank 11.

Filtration rainwater introduced into the membrane treatment tank 11 is the permeated water transport pipe 13 in a state in which turbidity, microorganisms and bacteria are removed from the submerged hollow fiber membrane 12 vacuum-filtered by the suction pump 15. Are provided for reuse.

Stopping the submersible pump (4) when the filter medium installed in the storage tank (7) of the present invention attempts to clean foreign substances that are stuck in the process of being filtered; Opening the solenoid valve 20 to generate a downflow of the rainwater in the reservoir 7 from the sponge layer 8d through the nonwoven fabric layer 8c to the regenerated waste tire media layer 8b. This is used.

Hereinafter, the rainwater filtration effect by the filtration device of the present invention will be described in detail based on the comparative example and the example without the sponge layer.

Comparative example)

Only the reclaimed waste tire filter media layer and the nonwoven fabric layer were installed in the reservoir as shown in FIG. 2 so as to be supported by the porous plate, and the rainwater was supplied at a surface load rate of 27.7 mL / min · cm 2.

Example

The reclaimed waste tire filter medium layer, the nonwoven fabric layer, and the sponge layer were installed in the reservoir as shown in FIG. 2 so as to be supported by the porous plate, and the rainwater was supplied at a surface load rate of 27.7 mL / min · cm 2.

In the examples, the suspended solids concentration could be lowered to 559.5 mg / L, and the permeability and the backwashing ability were excellent as in the comparative example.

In the case of total organic carbon, 62.3% was removed in the comparative example and 62.6% was also removed in the example, showing similar results.However, the comparative example showed 43.6% in terms of the removal rate of turbidity, while in the example, the removal rate was 66.5%. As shown in Fig. 1, the difference is remarkable.

Table 1) Rainwater filtration effect comparison table according to Comparative Example and Example

The present invention can be backwashed with rainwater that has passed through the filter medium without requiring other power, so maintenance is easy, and the filtration process is performed by the upstream flow, thereby minimizing the flow disturbing the normal flow, thereby improving the treated water quality. In addition, the treated rainwater can penetrate through the immersed hollow fiber membrane with micropore separation function of less than 0.4 ㎛ to remove residual turbidity, microorganisms and bacteria. It is a useful invention which has such an effect.

In addition, the reclaimed waste tire filter media has been recognized to be capable of replacing activated carbon because of its ability to adsorb heavy metals and organic substances as known from previous studies. According to the experiment, the organic matter contained in the outflow was induced to be removed by adsorption. As a result of the experiment, the sponge layer was found to have an effect of significantly reducing turbidity without damaging the permeability.

The present invention is environmentally friendly and recycles waste because it uses recycled waste tire media using waste tires discarded as waste.

As of February 2003, the number of registered vehicles in Korea is 14,131,147, and the amount of waste tires generated from this is 1,555,000 large, small and medium 17,106,000, and 935,000 two-wheeled vehicles. If it is used in the filtration device of the present invention, it is judged that the recycling of waste tires will be greatly increased, as well as the use of inexpensive recycled waste tire media, nonwoven fabrics, and sponges has the advantage of low economic burden for recycling rainwater.

The present invention has been described above with reference to the accompanying drawings, but is not limited thereto, and various modifications may be made without departing from the technical spirit of the present invention.

Claims (5)

Storage tank (7) provided with a check valve (6) is provided with a transfer pipe (5) for rain water flows into the lower portion of the filter medium, and the solenoid valve (20) is provided with a backwash water discharge pipe (19) used to clean the filter medium. ; Reclaimed waste tire media layer 8b and nonwoven fabric layer 8c having a diameter of 3 to 15 mm, supported by a porous plate 8a having a plurality of through holes serving as flow paths of rainwater, and coated with activated carbon on the surface of the reservoir 7. Rainwater filtration device consisting of; filter material, the sponge layer (8d) is arranged in order from the bottom. The rainwater filtering device according to claim 1, wherein the porous plate (8a) is disposed above and below each of the reclaimed waste tire media layer (8b), the nonwoven fabric layer (8c), and the sponge layer (8d). A water collecting tank 2 in which rainwater is collected through the inflow channel 1; An underwater pump (4) installed in the sump (2); Rainwater collected from the submersible pump 4 is supplied through the check valve 6 of the conveying pipe 5 connected to the lower part, so that the recycled waste tire media layer 8b, the nonwoven fabric layer 8c, and the sponge layer 8d are discharged. A storage tank 7 that is filtered by an upward flow method that sequentially passes through a filter medium, and has a downward flow for backwashing the filter medium through a backwash water discharge pipe 19 having a solenoid valve 20; A membrane treatment water tank 11 collecting rainwater flowing over the filter medium from the storage tank 7; An immersion type hollow fiber separator 12 installed in the separator treatment tank 11; A suction pump 15 which passes through the immersion hollow fiber membrane 12 and provides rainwater from which turbidity, microorganisms and bacteria have been removed, to the reused water through the permeate transfer pipe 13; And a blower (17) for supplying air to the immersed hollow fiber separator (12) through an air pipe (18) to clean the air. The water treatment system according to claim 3, wherein the submerged hollow fiber membrane 12 is a hollow yarn having a tensile strength of 35 to 40 kgf / fil and a pore diameter of 0.4 µm or less. The heavy water treatment system according to claim 3, wherein the permeate feed pipe (13) is provided with a vacuum pressure gauge (14) capable of confirming normal operation of the submerged hollow fiber membrane (12).