KR100648794B1 - The Method and Device to Treat Rivers and Lakes through the Combination of Upflow Contact/Filtration Facility and Artificial Wetland with Rolls/Mats to Grow Vegetation - Google Patents

Abstract

The present invention relates to a river water or lake water purification device composed of an upstream contact filtration facility and an artificial wetland facility using vegetation rolls. More specifically, filtration, adsorption, biological oxidation, ion exchange, denitrification, dephosphorization, and the like are performed by a two stage upflow contact filtration facility. More specifically, the primary removal of contaminants, such as river water or lake water, introduced through screens and settlements, and secondly, physical removal such as absorption, filtration and adsorption by artificial wetland facilities using vegetation rolls. After this is done, the final discharge is directed to an upstream contact filtration plant and an artificial wetland plant using vegetation rolls.

Unlike the existing filtration equipment, the water purifying apparatus according to the present invention adopts a two-stage upflow method to minimize clogging of the media to efficiently remove physical and biological contaminants, thereby enabling an advanced treatment in a short time. By minimizing the area of artificial wetland facilities using vegetation rolls designed for the purpose of additional physical removal and eco-friendly scenery, the water purification of mixed wetland facilities using two stage upflow contact filtration facilities and vegetation rolls The module of the unit structure can be continuously arranged according to the load fluctuations or the environment of the river or the appeal to be applied by modularizing the unit structure.

Description

River and Lake Water Purification {The Method and Device to Treat Rivers and Lakes through the Combination of Upflow Contact / Filtration Facility and Artificial Wetland with Rolls (/ Mats) to Grow Vegetation}

1 is an installation state perspective view showing a state in which the present invention is installed in a partially cut state;

Figure 2 is a block diagram showing the structure of a two-stage upflow contact / filtration equipment that is part of the water purification device of the present invention,

3 is a configuration diagram in which the primary and secondary media layers are coupled to the media layer layer case,

4 is a configuration diagram showing a forced discharge method of the excess treated water of the present invention,

5 is a block diagram of an artificial wetland facility using a vegetation roll that is part of the mixed water purification apparatus according to the present invention,

6 is an exemplary view of a material for planting vegetation in an artificial wetland facility that is part of a mixed water purification apparatus according to the present invention;

Figure 7 is a block diagram showing the structure of the inlet distribution pipe located in the front end of the primary upstream contact / filtration tank which is part of the mixed water purification apparatus according to the present invention,

8 is a block diagram showing a preferred example of controlling the water flow using the baffle in an artificial wetland facility that is part of the mixed water purification device according to the present invention,

9 is a block diagram showing a sludge collection method that is part of the mixed water purification apparatus according to the present invention,

10 is a bird's eye view of the actual installed state of the present invention,
Figure 11 is a perspective view of the present invention installed in parallel parallel state.

<Description of the symbols for the main parts of the drawings>

100: inflow 200: mesh screen 300: settlement

400; inlet distribution line 500: 1st upstream contact / filtration tank

600: secondary upstream contact filtration tank 700: treatment water tank

800: artificial wetland equipment using vegetation roll 900: effluent

The present invention relates to river water and lake water purification apparatus. More specifically, the contaminants are removed through the mechanism of filtration, adsorption, ion exchange, dephosphorization, biological oxidation, and denitrification in a two-stage upflow contact filtration system after the stream or lake water passes through the mesh screen and the settlement. Upstream contact and filtration, which, in turn, allow for additional physical removal by artificial wetland facilities using vegetation rolls (hereinafter referred to as vegetation rolls), as well as for the creation of landscape and ecological functions, and then circulating back to the inflowing streams or lakes. The present invention relates to a purification apparatus for river water and lake water in which artificial wetland facilities are installed.

Natural causes of water pollution include decreases in river capacity due to yearly imbalances of rainfall, discontinuities in flow rates and flow rates due to riverbeds, and inflow of streams of suspended solids due to sediment deposition in river basins. It doesn't matter that much. This is because after a certain amount of time it is naturally purged by nature with midnight power.

However, pollution of the natural water system due to the inflow of large amounts of organic substances or nutrients (phosphorus, nitrogen) generated by anthropogenic factors such as population growth, urban concentration, and industrial development are increasing, and especially, the sewage of living water is a weak source of water pollution. It occupies about 70%.

 Excess nutrients cause eutrophication in the water, causing abnormal reproduction of algae.They use water resources such as suppressing oxygen supply, destroying ecosystems through their own toxicity, and reducing landscape by changing water color and decreasing transparency. It causes problems such as reduction and deterioration of water quality due to the settling rot of dead body.

In order to prevent the contamination of rivers or appeals caused by anthropogenic factors, it is necessary to completely separate and collect the pollutants from these pollutants, and then discharge them into the natural water system, which is expensive and time-consuming. Therefore, methods for directly treating untreated and introduced pollutants in rivers or lakes have been researched and implemented. Examples include contact oxidation facilities using various materials and artificial wetland composition using vegetation.

Conventional techniques, despite their advantages, have a low treatment efficiency, resulting in a large site area required for a certain treatment or difficult maintenance, resulting in a significant reduction in the purification effect even after about a year. Has been pointed out that the environment is not environmentally friendly.

In particular, in order to continuously maintain high treatment efficiency of contact oxidation facilities that are more efficient than artificial wetlands, clogging of media by suspended solids or microorganisms that are generated and attached to a large amount should be minimized. Biological oxidation by microorganisms attached and growing between media must be actively performed at the same time, but the conventional downflow method is a frequent blockage phenomenon, which cannot be achieved faithfully, which has been a factor in reducing economic efficiency and processing capacity.

Separation and collection of the generated sludge forms a slope in the lower portion and is collected and removed. However, due to the flow of air or water, fine suspended solids in the discharged water are discharged together, so that efficient concentration is not achieved, which inevitably increases treatment costs.

On the other hand, conventional catalytic oxidation or artificial wetland has a disadvantage in that the treatment efficiency of nutrients (phosphorus, nitrogen), which is a causative agent of eutrophication, which is gradually attracting attention as mentioned above.

The present invention is to install a two-stage upflow contact filtration facility in the basement, which can be efficiently filtered, adsorption, ion exchange, biological oxidation, the upper side is installed artificial wetland using vegetation rolls with landscape creation and ecological functions pollutants We have developed a device that can simultaneously achieve two effects: removal and installation of a beautiful landscape.
That is, physical removal such as sedimentation or absorption is performed while passing through the lower stage two stage upstream contact filtration installation, so that the water purification effect can be achieved in a short time by achieving more advanced treatment than conventional river or lake purifier. In addition, it is possible to suppress the fine suspended solids flowing out together in the final effluent.

The sludge collection part of the two-stage upflow contact filtration system has a conical shape of the lower part so that sludge composed of suspended solids and desorption microorganisms in the filter bed can be efficiently concentrated in the sedimentation part before passing through the filter bed. Reduce. In the lower part of the filter, an air supply pipe (acid pipe) is installed for desorption of microorganisms and suspended solids that are excessively attached between the filter media, which delays the blockage of the filter and efficiently performs filtration and biological oxidation. Capability and longer media exchange cycles than conventional contact oxidizers.

On the other hand, the two-stage upstream contact filtration system and the mixed water purification system of artificial wetland using vegetation rolls are aimed at compact module structure so that one or more modules can be easily connected in series or parallel according to pollution load or surrounding environment. It can be deployed so that streams or appeals can be handled economically at all times.

An artificial wetland using vegetation rolls is installed in the upper ground part of the two-stage contact filtration facility, and at the same time, a walkable deck is installed to enable the creation of an environment-friendly space for viewing planted plants.

The present invention mainly relates to an apparatus for purifying river water or lakes or lakes contaminated with domestic sewage.

The present invention is a mesh screen installed on the riverbank or lake stool to filter out the suspended solids, such as garbage, leaves; Settlement paper to remove sand or soil; An inlet distribution pipe which is connected to the settlement and installed in an underground buried structure, and gradually reduces the perforated plate hole spaced away from the settlement so that the top water of the settlement is introduced evenly over the entire surface; Primary contact filtration tanks in which filtration, adsorption, ion exchange, and dephosphorization by particulate multi-layer media occur; A secondary contact filtration tank in which additional organic matter removal and nitrification and denitrification mechanisms are performed at the same time by the sticky media; A treatment tank for storing treated water and having a function of automatically forcibly discharging the treated water during heavy rain or freezing; It consists of an artificial wetland using vegetation rolls, in which the physical removal of pollutants through absorption, sedimentation and adsorption as well as the creation of landscape and ecological functions are performed.

In addition, even water flows into the contact oxidizer throughout the entire area, so that head loss does not occur in any part, and smooth operation is possible. In this two-stage upflow contact filtration system, the spacing of the perforated plates in the wall of the inlet distribution pipe is gradually reduced as it moves away from the settlement, so that the inflow is equalized across the entire surface. It is desirable to be able to.

In addition, the artificial wetland using the vegetation roll is preferably formed in a structure that can increase the residence time for physical removal such as absorption, precipitation by inducing the baffle to induce the flow of water in the form of a zigzag. .

The present invention further further comprises reducing the influent influent suspended matter load by reducing the suspended matter load of the stream water and the lake water flowing into the mixed water purification apparatus through the screen and the settling paper so as to efficiently process the mixed water purification apparatus; An influent distribution step in which the perforated plate hole spacing is gradually reduced as it is separated from the settling basin so as to be connected to the settling basin and the sedimentary supernatant flows evenly over the front of the second stage upflow contact / filtration system; A first upflow contact filtration step in which filtration by sludge blanket and filtration by sludge blanket and filtration, adsorption, ion exchange, and dephosphorization occur with sedimentation in which sedimentation of suspended matter that has not been removed from the sedimentation basin in the influent flows evenly; A second upflow contact / filtration step in which additional organic matter removal and nitrification and denitrification mechanisms are performed simultaneously by filtration by sludge blanket and by sticky media with a settling section having additional sedimentation; The final physical removal step is performed by the zigzag water flow by vegetation roll, baffle, etc., and additionally removing the contaminants through the absorption, sedimentation, as well as the creation of landscape and ecological functions.

On the other hand, in the two-stage upflow filtration / contacting equipment, there is a sediment which reduces the load of the media through the removal of the suspended solids introduced in the previous stage in the front of the media, and at the bottom of the media for the aerobic maintenance of the influent. It is preferable to form an air supply pipe (acid pipe) to the structure that can supply air for the activity of aerobic microorganisms.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

Figure 1 shows the overall configuration of the mixed water purification device according to the present invention.

As shown, the mixed water purifying apparatus according to the present invention includes a mesh screen 200 for filtering out inflow water 100 which is introduced into the mixed water purifying apparatus, wastewater of lake water, lake water, modeling materials, etc .; A sedimentation basin 300 having a sludge collection unit 590 for separating soil or sand in the influent 100 and collecting sludge separated therefrom; An inlet distribution pipe 400 positioned at the front of the apparatus and configured to distribute the inflow water evenly over the front of the first upstream two-stage contact filtration tank 500; The sludge difference designed in the shape of a cone at the bottom of the sediment and the primary filter layer 560 which is installed in the lower part of the device as a sediment, and the sediment and the filtration, adsorption, ion exchange, biological oxidation, etc. A primary contact filtration tank 500 having a collecting portion 590a; A second contact filtration tank 600 including a sedimentation unit, a sludge collection unit 590a, a string contact medium layer 660 in which additional organic matter removal and nitrification and denitrification occur; A treatment tank 700 for storing the treated water of the secondary contact filtration tank 600 before being pulled into the artificial wetland facility 800 using the vegetation roll which is a ground facility; Located on the upper ground of the treatment tank (700), it has a landscape creation and ecological functions, and after additional physical removal such as absorption, sedimentation, adsorption, etc., using the vegetation roll to introduce the effluent (900) into the river or lake It consists of an artificial wetland 800. In addition, the artificial wetland 800 is located on the upper part of the two-stage upflow filtration contact facility, which is an underground structure. It is useful to watch planted plants in normal times, and if maintenance is required such as exchanging media, dismantle the prefabricated deck 860 existing on the media layer and open the maintenance cover to carry out management work. .

Hereinafter, a detailed configuration of each part of the apparatus will be described in detail with reference to the drawings.

Figure 2 shows the structure of the two-stage upflow contact / filtration equipment that is part of the mixed water purification apparatus according to the present invention.

The structure of the primary contact filtration tank 500 which is installed in the lower part of the device as underground buried material is that the influent water that has passed through the settler is not removed from the settler first, but the suspended matter present in the stream water or the lake water that is introduced through the inlet distribution pipe 400. It passes through the sedimentation section, where the water flow is changed from the downstream to the upstream just before passing through the filter bed, which is filtered by Sludge Blanket and consists of a multi-layered primary filtration layer 560 that passes through the upstream. ) Are from below the coarse gravel layer 510 having a particle diameter of 60 to 70 mm, the intermediate gravel layer 520 of 30 to 45 mm, the granular zeolite layer 530 of 10 to 15 mm, and the active alumina layer 540 of 2 to 5 mm, respectively. It is composed of 400 ~ 500mm, 400 ~ 500mm, 300 ~ 500mm, 200 ~ 300mm thickness and the organic media and the removal of organic matter and particulate matter by filtration, adsorption, biological oxidation, zeolite The mechanism of removal of ammonium nitrogen by the cation exchange capacity, such as the removal (dephosphorization) by the activated alumina takes place as the incoming water passes through.

Water passing through the primary contact filtration tank 500 is introduced into the secondary contact filtration tank 600, and through the same settling portion as described above to create an environment in which additional organic matter removal, nitrification, and denitrification are generated by the microorganisms. Pass through the contact media layer in the form of a string.

The primary contact filtration tank 500 and the secondary contact filtration tank 600 both supply air to the lower end of the settling portion and to the lower end of the secondary filter layer 660 composed of the multilayer and the primary contact filter media. Continuously high processing efficiency by installing air supply pipe 580 and desorption air supply pipe 585 for desorption of particles and microorganisms, which are largely adhered between the dragon and the media, to enhance the activity of aerobic microorganisms and suppress the blockage of the media. It is preferable to set it as the structure which can achieve this. In addition, the sludge is drawn out from the sludge collector 590a designed in a cone shape for efficient concentration of the settled sludge.

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On the other hand, since pollutants that need to be added or focused on the treatment target vary according to the surrounding environment of the river or the lake, it is impossible to optimally respond to each case in one way.

In other words, if there are restaurants and restaurants in the vicinity, the necessity of removing surfactants caused by oil or detergent from rivers and lakes is emphasized even if they are sent after individual treatment. Means that it is desirable to give greater weight to the removal of nitrogen and phosphorus caused by manure, fertilizers, pesticides and the like.

As mentioned above, this method envisions a case that has a ring at the top and contains the entire primary filter layer for the convenience of replacement. By pre-manufacturing the case, it is also possible to easily change the field to a case corresponding to the need.

For example, in a situation in which heavy metals need to be removed, such as small factories, etc., a garnet having a particle diameter of 1 to 2 mm, which is effective for removing heavy metals in the active alumina site in the upper portion of the primary filter layer in the above filter layer. (Garnet) is placed, and if there are a large number of restaurants, the zeolite and activated alumina layer is replaced by diatomaceous earth with particle diameter of 1.5 to 3.0 mm to remove activated carbon and oil with particle size of 15 to 20 mm to remove surfactant. .

If high turbidity is a problem, replace the zeolite layer and the activated alumina layer with a garnet with a particle diameter of 1-2 mm and an anthracite layer with a diameter of 0.7-1.5 mm.

In the case of relatively low turbidity, but in the vicinity of farmland, nutrients contained in fertilizers or pesticides are a problem, especially nitrogen content is high.

In this case, the media layer is composed of an intermediate gravel layer with a particle size of 30 to 45 mm, a granular zeolite layer with a particle size of 10 to 15 mm, activated carbon with a particle size of 5 to 15 mm, and an activated alumina layer with a particle size of 2 to 5 mm, which are effective for removing additional ammonia nitrogen. Configure.

In addition, the two-stage upflow contact filtration facility to be installed as underground buried is installed at a distance of about 1m from the ground to minimize the damage to the facility frozen in winter.

3 is a configuration diagram in which the primary and secondary media layers are coupled to the media layer layer case.

The primary filter layer 560 made of a multi-layer is preferably configured by filling the individual filter medium in the module case consisting of a porous plate in the lower part to enable the flow of water to minimize the mixing between media, two-stage upflow contact filtration The parts except for the medial layer part in the facility are installed as semi-permanent facilities, and the primary medial layer 560 and the secondary medial layer 660 are contained in separate cases 560a and 660a provided with loops on the upper side, so that individual upflow contact is made. It is desirable to maximize the ease of maintenance by installing it in a filtration tank and replacing it with a new filter bed case by lifting it with heavy equipment, etc. at the time of replacing the filter.

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Figure 4 shows the forced discharge of the treated water for the maintenance of the apparatus of the freezer or during heavy rain in the treatment tank which is part of the mixed water purification apparatus according to the present invention.

In general, a two-stage upflow contact / filtration system is used for supplying treated water to the artificial wetland 800 using the vegetation roll on the ground by the self-suction pump 710 on the ground, or in an inflow period in which the flow rate increases due to flooding or the like. Water flows from the artificial wetland facility 800, which is the next step, to greatly reduce treatment efficiency and landscape, and there is no water flow in winter when the treated water supply pipe to the artificial wetland exposed to the ground can be frozen. If the self-suction pump 710 is idle in the situation, frequent failure of the pump is foreseen, so it is desirable to devise a structure of the treatment tank to prepare for both cases.
To this end, in the present method, two auto valves 730a and 730b are installed in the treatment tank 700, and the flow rate sensor 720 installed in the treatment water pipe detects this in a freezer having very high flow rate and very little flow rate. In this case, the two auto valves 730a and 730b are signaled to open the upper auto valve 730a in the former case, the lower auto valve in the latter case to be opened (730b), and in each case, self-suction type. By stopping the operation of the pump 710, the treated water is discharged directly to a river or lake without passing through the artificial wetland 800 using the vegetation roll.
In the general case except for the two cases, the two auto valves 730a and 730b are closed and the self-suction pump 710 is restarted to achieve the desired purpose.

Figure 5 shows the configuration of the artificial wetland facility 800 using the vegetation roll that is part of the mixed water purification apparatus according to the present invention.

The structure of the artificial wetland facility is the bottom of the vegetation roll 810 gravel layer 820 having a particle size of about 10 ~ 20mm, sandy loam to prevent the sandy loam 830 in which wetland plants are planted together with the inflow water from the top. Layer 830, porous ceramic layer 840 having a particle diameter of 5 to 10 mm to allow further removal by adsorption, are filled to a height of 50 to 100 mm, 100 to 200 mm, and 50 to 100 mm, respectively, and the flow of water is zigzag. The baffle 850 can be stacked. The deck 860 is placed on the unit.

6 shows a material for planting vegetation in an artificial wetland facility which is part of the mixed water purification apparatus according to the present invention.
The vegetation roll 810 or the vegetation mat 810a is used for this purpose.

Figure 7 shows the structure of the inlet distribution pipe 400 located in front of the primary contact filtration tank which is part of the mixed water purification apparatus according to the present invention. If the influent is not evenly distributed in the primary contact filtration tank 500, the head loss of the contact filtration layer rises quickly, causing a decrease in treatment efficiency, so that the uniform inflow over the entire surface is very important. The inlet distribution pipe is preferably located at the front end of the primary contact filtration tank to reduce the spacing of the perforated plate hole gradually away from the settling paper 300 so that the inlet water is evenly introduced to the front.

Figure 8 shows a preferred example of controlling the water flow using the baffle in the artificial wetland facilities that are part of the mixed water purification apparatus according to the present invention.
By installing a baffle 850 to zigzag the flow of water introduced from the treated water tank 700, after additional physical removal such as absorption and precipitation within the increased residence time, the effluent 900 to the river or lake or Let out.

9 shows a sludge collection method of the mixed water purification apparatus according to the present invention.

The shape of the sludge collectors 590 and 590a of the clarifier 300, the primary contact filtration tank 500 and the secondary contact filtration tank 600 increases the concentration efficiency of the sludge by the precipitated particles and the desorption microorganisms, and In order to reduce the sludge volume due to digestion by the microorganisms present, it is preferable to form a cone, and discharged out of the system through the sludge collecting pipe 595 to be treated in consignment or sewage collection.

10 schematically shows an embodiment of the present invention.

Untreated raw sewage in the middle of the river basin in the middle of the stream through the small pipe (1000) to increase the pollution of the stream, so that the mixed water purification device according to the present invention in the stream near the sewage inlet and By installing and discharging the discharged water 900 downstream to the stream by installing the process over a low lake, it can be differentiated from the existing water purification apparatus that draws and treats the river water to the stream side.

On the other hand, the above examples and drawings are merely for the purpose of describing the contents of the invention in detail, not intended to limit the scope of the technical idea of the invention, those of ordinary skill in the art to which the present invention described above belongs As various substitutions, modifications, and changes are possible without departing from the spirit and scope of the present invention, it is not to be limited to the embodiments and the accompanying drawings, as well as the claims below and equivalents together with the claims. It should be judged including the scope.

As another feature of the present invention shown in Figure 11 is a repeating arrangement of the purification device of the same structure consisting of the mesh screen, the settlement, the distribution pipe, the primary contact / filtration tank, the secondary upflow contact and filtration tank, the treatment tank It is. Depending on the river, lake, lake water quality, size, etc., these devices are installed repeatedly to maximize the purification efficiency.

On the other hand, according to the present invention as described above, the water purification device is primarily used to filter the contaminants, such as river water or lake water, introduced through the screen and the settlement through the mechanism of filtration, adsorption, biological oxidation, ion exchange, denitrification, dephosphorization, etc. By combining upstream contact / filtration equipment that is removed by water and artificial wetland equipment that uses landscape vegetation and vegetation rolls with additional physical removal such as absorption, sedimentation and adsorption, eco-friendly and high-level treatment is achieved in a short time. By adopting upflow and desorption air supply pipe in contact filtration equipment, it minimizes clogging of media compared to existing contact or filtration equipment, and maintains high efficiency treatment, and is based on compact module that is easy to install and maintain. There is an advantage that can cope with load fluctuations efficiently and economically.

In addition, the treated water tank has a high inflow rate so that the mandatory flooding of the artificial wetland using the vegetation roll is expected, or for the maintenance of the winter season, which is expected to be damaged due to the idling of the self-priming pump due to the freezing of the treated water supply pipe, which is a ground equipment. By using two auto valves connected to the flow rate sensor, both cases can be operated to stop the self-priming pump and drain the treated water directly to a river or lake without sending it to an artificial wetland using vegetation rolls. It has the advantage of making it possible.

The purpose of this method is to reduce the pollution load on the water system near the inflow point before the raw water enters through the small pipes and spreads into the water system in the middle of the river or lake basin. It is intended to economically reduce the pollution of the entire water system, unlike the existing water purification device, in which the water of the object to be treated has a large volume by treating the material by raising it to a stream or lakeside in the state of diffusion. .

For this purpose, this process, unlike the conventional downflow filtration or contact type, adopts the upflow to efficiently perform filtration and biological oxidation, minimizing filter blockage, and in addition, dephosphorization, nitrification, Denitrification, adsorption, and absorption were designed to coexist as additional removal mechanisms. In order to evaluate the actual treatment capacity, a batch experiment as shown in Figure 1 was conducted.

In order to implement the two-stage upflow contact filtration system at the front of the process, two fixed bed columns were connected in series and the raw water and the primary treated water were introduced into the pump from the bottom of each fixed bed column.

The fixed-phase column used had a cylindrical structure having an inner diameter of 30 mm and a height of 300 mm. The primary column was filled with gravel, activated alumina and zeolite from below, and the secondary column was filled with Saranok, which is one of string media.

The particle size (fill height) of the filler for the primary column is 5 mm (100 mm) in average, 3 mm (30 mm) in average, and 1.25 mm (50 mm) in average, and the filling height of the filler for the secondary column (sarang green) is 100 mm. It was.

The raw water inflow flow rate was set to 12 ml / min.

The experiment was conducted 20 times, and the raw water was used for the inflow of the sewage treatment facility in Jeonbuk, Korea (June 2004). The water quality was averaged with BOD 40mg / L, SS 52mg / L, TN 25 mg / L, TP 3 mg / L.

Figure 1. Schematic diagram of batch test

On the other hand, Jung et al. (2003) showed that the high-efficiency sewage treatment tanks were the highest at 56 sites, according to the results of field visits from 207 village sewers operated in 13 cities and counties in Jeollabuk-do from March to August 2003. Infiltration trench method was found in 39 places. There are 33 advanced manure and high concentration organic wastewater treatment methods, 24 places of batch activated sludge process, 11 places of GBM process, 6 places of soil type sewage purification device (machining hole trench), 5 places of contact oxidation method, 4 points of suspension microorganism contact aeration method. It was investigated.

In addition, the water quality distribution of BOD, TN, and TP of influent of village sewage treatment facilities was investigated. BOD accounts for most of 50mg / L or less and TN of 20 ~ 30mg / L has the largest distribution. The concentration of nitrogen was higher than that of organic materials. Most of T-P was below 10mg / L, and the distribution of 1 ~ 5mg / L was the highest. The mean influent water quality at 37 survey sites was 39mg / L, T-N 27mg / L, and T-P 2mg / L. As a result, the raw water used in this experiment has similar water quality, and according to Jeong et. (2003), the treatment facilities in Chungnam and Jeonbuk areas in 2001 and 2002 were over 100ton / day. It can be seen that it is similar to BOD 52mg / L, TN 35mg / L, and TP 4.5mg / L. Therefore, it is reasonable to assume that the water quality of the influent of many small village sewage treatment plants in the whole country is in the same range as above.

Table 1 shows the BOD, T-N, T-P average treatment efficiency by the method, the overall BOD removal efficiency was 57%, T-N 31%, T-P 17%.

Table 1. Average Processing Efficiency of BOD, T-N, and T-P by Process

The treated water by these methods is the point of survey for BOD, TN, and TP in certain local village sewage effluent water quality standards (BOD 10mg / L or less, SS 10mg / L or less, TN 20mg / L or less, TP 2mg / L or less) About 50% of them exceeded the effluent water quality standards.

The results obtained in the above experiments simulating this method are shown in Figure 2.

Figure 2. Evaluation of treatment efficiency of the present invention

Therefore, it can be seen that the above results can sufficiently satisfy the quality of the sewage effluent water quality standards in certain local villages. Of course, there may be some difference between the actual application and the lab experiment, but this method is performed through the artificial wetland using vegetation roll after the two-stage contact filtration step, and additional physical treatment such as absorption, adsorption, and precipitation is performed. Therefore, it may be possible to show similar or better treatment efficiency in actual application.

In the above, the present invention is compared with the existing similar method, by having a superior application effect, it is determined that it can be an alternative that can efficiently complement or replace the existing small village sewage treatment facilities.

Claims (13)

It is installed in the river water channel or lakeside to filter out plastic floating materials such as trash and leaves, a settlement screen to remove sand or soil, and a distribution pipe and media layer connected to the settlement so that the contaminated water flows evenly. In the case of the river and lake water purification device which is individually filled in the module case consisting of a plate of the substructure, consisting of artificial wetland using a contact filtration tank, vegetation roll or vegetation mat for decomposition and removal of contaminants The contact filtration tank is composed of a coarse gravel layer having a particle diameter of 60 to 70 mm, a middle gravel layer of 30 to 45 mm, a granular zeolite layer of 10 to 15 mm, and an active alumina layer of 2 to 5 mm in order from the bottom to the top, and Continuously adjacent to the above-mentioned primary contact filtration tank, the filter medium composed of a string-like form of a flexible structure is composed of a secondary contact filtration tank is multi-arranged, The artificial wetland 800 at the top has a gravel layer having a particle size of about 10 to 20 mm, a sandy loam layer, and a porous ceramic layer having a particle diameter of 5 to 10 mm, respectively, 50 to 100 mm from the bottom to the top to allow further removal by adsorption. , 100 ~ 200mm, 50 ~ 100mm is filled in height, the vegetation roll 810 or vegetation mat 810a which is a vegetation base material is installed in the space between the baffle consisting of zigzag The treatment tank 700 for storing the decontaminated water that has passed through the first and second contact filtration tanks is installed adjacent to the second contact filtration tank, and the flow rate is detected by the flow sensor 720 to detect the auto valve. 730a, 730b) and self-acting pump 710 on. River water and lake water, characterized in that configured to discharge the first and second filtered water stored in the treatment tank off in the natural water system through the artificial wetland 800 or immediately into the natural water system without passing through the artificial wetland 800. , Purifier. delete delete delete delete delete The method of claim 1, River water characterized in that the primary contact filtration tank is laminated from below with a coarse gravel layer having a particle diameter of 60 to 70 mm, an intermediate gravel layer of 30 to 45 mm, a granular zeolite layer of 10 to 15 mm, and a garnet layer of 1 to 2 mm. Purifier of appealing water. The method of claim 1, The primary contact filtration tank is laminated from below with a coarse gravel layer having a particle diameter of 60 to 70 mm, an intermediate gravel layer of 30 to 45 mm, an activated carbon layer of 15 to 20 mm, and a diatomaceous earth layer of 1.5 to 3.0 mm to remove oil. Purifiers for river and lake water. The method of claim 1, The median layer of the primary contact filtration tank is characterized by laminating a coarse gravel layer having a particle diameter of 60 to 70 mm, an intermediate gravel layer of 30 to 45 mm, a garnet layer of 1 to 2 mm, and an anthracite layer of 0.7 to 1.5 mm from below. Purification device for river water and lake water. The method of claim 1, The medial layer of the primary contact filtration tank is composed of a middle gravel layer having a particle diameter of 30 to 45 mm, a granular zeolite layer of 10 to 15 mm, activated carbon of 5 to 15 mm and an activated alumina of 2 to 5 mm, which are effective for removing additional ammonia nitrogen. Stream water and lake water purification apparatus characterized in that the lamination in layers. delete delete delete

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