KR20060028233A - 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 stream or lake water purification method and apparatus consisting of an upstream contact / filtration system and an artificial wetland facility using vegetation rolls (/ mats). The two-stage upflow contact / filtration system includes filtration, adsorption, and biological treatment. Through mechanisms such as oxidation, ion exchange, denitrification, and dephosphorization, contaminants such as river water and lake water introduced through screens and settlements are primarily removed, and secondly, artificial wetland facilities using vegetation rolls (/ mats) are used. Physical removal such as absorption, filtration, and adsorption by means of additional removal, and the method of purifying river water and lake water, which is a mixture of an upstream contact / filtration facility for final discharge and an artificial wetland facility using vegetation roll (/ mat); To the device.

Unlike the existing filtration equipment, the water purification device according to the present invention adopts a two-stage upflow method to minimize clogging of the media to efficiently remove the physical and biological contaminants, thereby enabling high-level treatment in a short time. Two-stage upflow contact / filtration and vegetation rolls (/ mats) by providing an environment and minimizing the area of artificial wetland facilities using vegetation rolls (/ mats) designed for additional physical removal and eco-friendly landscapes. It is possible to cope economically and easily in various cases by arranging one or more modules consecutively if necessary according to the load fluctuation or environment of river or appeal to be applied by modularized mixed water purification of artificial wetland facility using compact structure. It has advantages.

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 block diagram showing a forced discharge method of excess treated water of the present invention,

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

5 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 6 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,

Figure 7 is a block diagram showing a preferred example of controlling the flow of water using baffle in the artificial wetland equipment that is part of the mixed water purification apparatus according to the present invention,

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

9 is a bird's eye view of the actual installed state of the present invention,

10 is a perspective view of the present invention installed in parallel parallel state.

<Description of Symbols for Main Parts of Drawings>

100: inflow 200: mesh screen 300: settlement

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

600: 2nd upstream contact / filtration tank 700: treatment tank

800: artificial wetland equipment using vegetation roll (/ mat) 900: effluent

The present invention relates to a method for purifying river water and lake water, and a purification device for achieving the same. The method includes filtration, adsorption, ion exchange, and dephosphorization in a two-stage upflow contact / filtration unit after river water or lake water passes through a mesh screen and a settlement. The pollutants are removed through mechanisms of biological oxidation, denitrification, and secondly, additional physical removal by artificial wetland facilities using vegetation rolls (/ mats) as well as the creation of landscapes and the execution of ecological functions are carried out. The present invention relates to an apparatus for purifying river water and lake water, which is a mixture of an upstream contact and filtration facility for recycling back to an lake or an artificial wetland facility using a vegetation roll (/ mat).

 The natural causes of water pollution include lowering of river capacity due to yearly imbalance of rainfall, discontinuity of flow rate and flow rate due to riverbed type, and inflow of various suspended solids due to sediment deposition in river basin. It doesn't matter that much. This is because nature has a self-cleaning ability and after a certain period of time it is purified.

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 accounts for 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. Continue to cause problems such as reduction, deterioration of water quality due to the settling rot of the dead body.

In order to prevent contamination of rivers or appeals caused by anthropogenic factors, the complete collection and treatment of these pollutants must be carried out and discharged into natural water systems, but this requires enormous cost and long time. 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.

The sludge collection generated has a lot of gradients in the lower part, which may be discharged with fine suspended solids in the effluent by air or water flow, or increase the cost of treatment because efficient concentration does not occur. Have

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.

In view of the above problems, the present invention is based on a two-stage upflow contact / filtration system that can efficiently perform filtration, adsorption, ion exchange, and biological oxidation. By physically removing sediment and absorption while passing through the used artificial wetland, the water treatment effect can be achieved within a short time by achieving more advanced treatment than existing river or lake purifier, and fine suspended matter in the final effluent. This can be suppressed from flowing out together.

The sludge collector of the two-stage upflow contact / filtration system is constructed in the shape of a cone so that sludge composed of suspended solids and desorption microorganisms in the filter bed can be efficiently concentrated in the settling section 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, this two-stage upflow contact / filtration system and artificial wetland water purification system using vegetation roll (/ mat) is aimed at compact module structure, and one or more modules can be connected in series or parallel according to pollution load or surrounding environment. It can be easily arranged so that it is possible to economically treat streams or appeals.

The two-stage upflow contact / filtration facility installs an artificial wetland using vegetation rolls in the upper ground as underground buried material, but maintains cover 2 (primary upflow contact / filtered tank at the top of underground buried ground for maintenance such as filter exchange). For the second and second upflow contact / filtration tanks, with a little space on the cover and an easy-to-detachable deck that can be easily attached or detached. By constructing an artificial wetland and a deck, it is possible to create an environment-friendly space for viewing the planted plants while using the deck for walking.

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 upflow contact / filtration baths where filtration, adsorption, ion exchange, dephosphorization by particulate multilayer media occurs; Secondary upflow contact / filtration baths in which additional organic material removal and nitrification and denitrification mechanisms are performed simultaneously by the string media; A treatment tank for storing treated water and having a function of automatically forcibly discharging the treated water in case of heavy rain or freezing; It is composed of artificial wetlands using vegetation rolls (/ mats), in which physical removal of pollutants through absorption, sedimentation and adsorption as well as the creation of landscapes 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 plant, the spacing of the perforated plates in the wall of the inlet distribution pipe is gradually reduced as it moves away from the settling basin. It is desirable to be able to equalize.

In addition, the artificial wetland using the vegetation roll (/ mat) is formed in a structure that can increase the residence time for physical removal such as absorption, sedimentation, etc. by installing the baffle appropriately to induce the flow of water into a zigzag form It is desirable to be.

The present invention further further comprises reducing the load of influent water suspended solids to efficiently process the mixed water purification apparatus by reducing the amount of suspended solids in the stream and lake water flowing into the mixed water purification apparatus through the screen and the settlement. 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; Primary upflow contact / filtration stage with filtration by sludge blanket and filtration, adsorption, ion exchange, and dephosphorization by sludge blanket and sedimentation by sedimentation of suspended solids that have not been removed from the sedimentation basin in evenly influent. ; 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 of additionally creating a landscape, performing ecological functions as well as removing contaminants through absorption and sedimentation by zigzag water flow by vegetation roll (/ mat) and baffle.

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-type water purifying apparatus according to the present invention includes a mesh screen 200 for filtering out inflow water 100 flowing into the mixed-type water purifying apparatus, the wastewater of the lake water, the garbage of the modeling material, and the like; Sedimentation 300 having a sludge tea house 590 to separate the soil or sand in the inflow water 100 is separated sludge is collected; An inlet distribution pipe 400 positioned at the front of the apparatus and configured to distribute the inflow water evenly over the first upstream two-stage contact / filtration tank 500; The lower portion of the primary filter layer 560 and the settling portion 510 which is installed in the lower part of the device as a underground buried material and consists of a multi-layered structure where the mechanism of filtration, adsorption, ion exchange, biological oxidation, etc. is performed efficiently at the same time. A primary upflow contact / filtration tank 500 having a sludge collection portion 590a designed to have a cone shape; The secondary water is composed of a sedimentation unit 510a, a sludge collection unit 590b, and a string contact medium layer 610 in which additional organic matter removal, nitrification and denitrification occur. Upflow contact / filtration bath 600; A treatment tank 700 for storing the second upstream contact / filtration tank 600 before it is drawn up to the artificial wetland facility 800 using a vegetation roll (/ mat) as a ground facility; Located on the upper ground of the treatment tank (700), the vegetation rolls to keep the effluent (900) into the river or lake after the additional physical removal, such as absorption, sedimentation, adsorption, etc. to retain the landscape and ecological functions, Mat) is composed of artificial wetland (800). And the artificial wetland 800 is located in the upper part of the two-stage upflow filtration / contact facility, which is an underground structure, but it is necessary to consider maintenance for the exchange of media, etc. It is necessary to install it with a margin to watch the planted plant in normal times, and when maintenance such as media exchange is required, dismantle the prefabricated deck 870 present on the media layer and open the maintenance cover to perform management work. do.

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 upflow contact / filtration tank 500 which is installed as underground buried in the lower part of the device is that the influent water that has passed through the settler 300 is not first removed from the settler 300 but through the inlet distribution pipe 400. Through the settling section 510 to remove the suspended substances present in the incoming river or lake water, where the water flow is changed from the downflow to the upstream just before passing through the filter bed, the filtration by the Sludge Blanket The primary filtration layer 560 composed of multiple layers passed through the upstream has a coarse gravel layer 520, a middle gravel layer 530, and granules having a particle diameter of 60 to 70 mm, 30 to 45 mm, 10 to 15 mm, and 2 to 5 mm, respectively, from below. The zeolite layer 540 and the active alumina layer 550 are each loaded with a thickness of 400 to 500 mm, 400 to 500 mm, 300 to 500 mm, and 200 to 300 mm, and thus are filtered, adsorbed, and biologically oxidized in the primary filter layer 560. Removal of organic matter and particulate matter by zeolite The removal of ammonia nitrogen by the positive ion-exchange capacity and the phosphorus removal (dephosphorization) by activated alumina are carried out through the inflow water.

The water passing through the first upstream contact / filtration tank 500 enters the second upflow contact / filtration tank and passes through the same settling as described above, whereby additional organic matter removal, nitrification and denitrification are advantageously caused by microorganisms. In order to form a pass through the contact medium in the form of a string.

The first upflow contact / filtration tank 500 and the second upflow contact / filtration tank 600 are composed of a primary filter layer 560 and a string contact filter, which are composed of the bottom and the multilayer of the settling parts 510 and 510a. At the lower end of the secondary filter layer 610, an air supply pipe 580 and a desorption air supply pipe 585 are installed for desorption of particles and microorganisms, respectively, which are attached between the air supply and the filter medium, respectively. It is desirable to have a structure that can attain continuous high processing efficiency by strengthening and suppressing clogging of the media. In addition, the sludge is drawn out from the sludge collectors 590a and 590b designed in a cone shape for efficient concentration of the settled sludge.

In particular, the primary filter layer consisting of a multi-layer is preferably configured by filling the individual filter in the module case consisting of a porous plate in the lower part in order to enable the flow of water to minimize the mixing between media, two-stage upflow contact / filtration In the facility, the part except the filter layer part is installed as a semi-permanent facility, and the first and second filter layers are placed in a separate case with a hook installed at the top and mounted in individual upflow contact / filtration tanks. It is desirable to maximize the ease of maintenance by lifting it using heavy equipment and replacing it with a new filter case.

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 a small factory, 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 filter layer. (Garnet) and if there are a large number of restaurants, replace the zeolite and activated alumina layer with diatomaceous earth with particle size 1.5 ~ 3.0mm to remove activated carbon and oil with particle size 15-20mm to remove surfactant .

In addition, when high turbidity is a problem, instead of a zeolite layer and an activated alumina layer, a garnet having a particle diameter of 1-2 mm and an anthracite layer of 0.7-1.5 mm are replaced.

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 median layer is composed of an intermediate gravel layer with a particle diameter of 30 to 45 mm, a granular zeolite layer with a particle diameter of 10 to 15 mm, activated carbon with a particle diameter of 5 to 15 mm, and an activated alumina layer with a particle diameter 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 in order to minimize the damage of the facility frozen in winter.

Figure 3 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.

Normally, the treated water is supplied to the artificial wetland 800 by using the upper vegetation roll (/ mat) by the self-priming pump 710 on the ground. Water flows from the artificial wetland facility 800 using vegetation roll (/ mat), which is the next step of the contact / filtration facility, which can greatly reduce treatment efficiency and landscape, and supply treated water to the artificial wetland exposed to the ground. In winter when the pipe can be frozen, if the self-priming pump 710 idles in the absence of water flow, frequent failure of the pump is foreseen. Therefore, it is recommended to design the structure of the treatment tank to prepare for both cases. desirable.

To this end, in the present method, an auto valve 730 is installed at the top and bottom of the treatment tank 700, respectively, and the treated water supply pipe near the self-suction pump 710 is used for a very fast flow rate and a freezing case having almost no flow rate. The flow rate sensor 720 installed in the sensor detects this and sends a signal to the two auto valves 730, opening the upper auto valve in the former case, and opening the lower auto valve 730 in the latter case. In the case of stopping the operation of the self-suction pump 710 in both cases directly discharged the treated water to the stream or lake without going through the artificial wetland by the vegetation roll (/ mat) and if the flow rate is detected except in both cases Auto By closing the valve 730 and restarting the self-priming pump 710 it is possible to achieve the desired purpose.

Figure 4 shows the configuration of the artificial wetland facility 800 using the vegetation roll (/ mat) 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 diameter of about 10 ~ 20mm, sandy loam to prevent the outflow of sandy loam 830 in which wetland plants are planted with inflow water from above. Layer 830, porous ceramic layer 840 having a particle diameter of 5 to 10 mm to allow further removal by adsorption, is 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. It is preferable that the baffle 850 can be contained and it can contain both and the case 860 with a hole left and right for the flow of water. And the deck 870 is placed on this unit.

5 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.

For this purpose, a vegetation roll 810 or a vegetation mat 810a is used.

Figure 6 shows the structure of the inlet distribution pipe 400 located at the front end of the primary upflow contact / filtration tank 500 that is part of the mixed water purification apparatus according to the present invention. If the influent is not evenly distributed in the first upstream contact / filtration tank 500, the head loss of the contact / filtration layer rises rapidly, leading to a decrease in treatment efficiency, so the equal inflow over the front is very important. Do. The inflow distribution pipe is preferably located at the front end of the first upstream contact / filtration tank to gradually reduce the distance between the perforated plate hole spaced away from the settling paper 300 so that the inflow water is uniformly introduced to the front.

Figure 7 shows a preferred example of controlling the water flow using the baffle in an artificial wetland facility that is part of the mixed water purification apparatus according to the present invention.

Baffle (850) and landscape creation and ecological functions to zigzag the flow of water from the treatment tank (700) and additional physical removal such as absorption and precipitation within the increased residence time by the baffle (850) After it is made, the effluent 900 is streamed, appealed, or spilled.

Figure 8 shows the sludge collection method of the mixed water purification apparatus according to the present invention.

The shape of the sludge collectors 590, 590a, and 590b of the settler 300, the first upflow contact / filtration tank 500, and the second upflow contact / filtration tank 600 is sludge due to sedimented particles and desorption microorganisms. In order to increase the concentration efficiency of the and to reduce the sludge volume by the digestion action by the microorganisms in the influent is preferably in the form of a cone and discharged / consigned out of the system through the sludge collecting pipe (595).

9 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 discharging the discharged water 900 downstream to the stream by installing / processing it over a low shore, it can be distinguished from the existing water purification apparatus which 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 10 is composed of a mesh screen, sedimentation basin, distribution pipe, the first upstream contact / filtration tank, the second upflow contact and filtration tank, the treatment tank to be connected to the treatment tank 700 The purification device of the same structure is repeatedly arranged. 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. Fast time through eco-friendly and advanced treatment by mixing upstream contact / filtration equipment that is removed by water and artificial wetland equipment using vegetation rolls (/ mats), which create landscape and ecological function and additional physical removal such as absorption, sedimentation and adsorption. It shows the effect of treatment inside, and adopts upflow and desorption air supply pipe to contact / filtration equipment to minimize the blockage of filter media compared to existing contact or filtration equipment, and to maintain high efficiency treatment, and it is easy to install and maintain. Based on the module, it has the advantage of being able to cope with the change of pollution load efficiently and economically.

In addition, the treated water tank has a high inflow rate and is expected to be flooded by artificial wetlands using vegetation rolls (/ mats) or during the winter season when damage is caused by idling of the self-priming pump due to freezing of the treated water supply pipe. For maintenance, the two auto valves connected to the flow rate sensor are used to shut down the self-priming pump and drain the treated water directly to the river or lake without sending the treated water to the artificial wetland. It has the advantage of being able to maintain state.

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, Chung et al. (2003) showed that the high efficiency sewage consolidation tank was the highest at 56 sites, according to the results of the field visits of 207 village sewerage 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, BOD, TN, and TP of water inflows from village sewage treatment facilities were investigated. BOD accounts for most of 50mg / L or less, and TN of 70 ~ 30mg / L has the largest distribution of 20 ~ 30mg / L. The concentration of nitrogen was higher than that of organic materials. Most T-Ps were below 10mg / L, with the most distribution of 1 ~ 5mg / L concentration. 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 average treatment efficiency of BOD, T-N, and T-P by the method, and overall BOD removal efficiency was 57%, T-N was 31%, and T-P was 17%.

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

BOD5 Average Removal Efficiency (%) T-N Average Removal Efficiency (%) T-P Average Removal Efficiency (%) High efficiency sewage treatment plant 55 38 9 Advanced treatment of manure and high concentration organic wastewater 53 40 34 Batch Activated Sludge 33 4 4 Soil Sewage Purifier 61 26 38 Suspension multi-level advanced processing 64 46 20 Contact abandonment method 85 41 11 Merger septic tank using SM carrier 43 35 24 Immersion membrane separation method 87 3 63 Absorbent Biofilter 62 21 4 GBM Act 78 25 53 BC-Media Act 91 56 29 Suspension microbial contact aeration 46 48 8 Nitrogen Phosphorus Removal Device for Sewage 33 11 5 Advanced treatment using special microorganisms 57 24 13 Total process average removal rate 57 31 17

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 the water exceeded 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 a method of absorption, adsorption, sedimentation, etc. through the artificial wetland using vegetation roll (/ mat) after the two-stage contact / filtration step. Since the physical treatment is additionally performed, it is determined that the treatment efficiency may be similar to or better than that in the practical 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)

A mesh screen (200) installed on a blister or lake side of a river channel to filter out plastic suspended materials such as garbage and leaves; Settlement paper 300 to remove sand or soil; A distribution pipe 400 which is connected to the settlement and installed in an underground buried structure, and the perforated plate hole space is gradually reduced from the settlement so that the settlement of the settlement is equalized over the entire surface of the settlement; Primary upflow contact / filtration tank 500 where filtration, adsorption, ion exchange, and dephosphorization by the particulate multilayer media occur; A secondary upflow contact and filtration tank 600 installed in an underground buried structure and efficiently carrying out additional organic matter removal and nitrification and denitrification mechanisms by a string medium; A treatment tank 700 having a forced discharge of treated water capable of maintaining the treatment efficiency or landscape of the following artificial wetlands even during heavy rain or freezing; Purification device of river and lake water consisting of artificial wetland (800) using vegetation roll (/ mat) which is not only performing landscape creation, ecological function but also physical removal of pollutants through absorption, sedimentation and adsorption. The method of claim 1, The primary and secondary upstream contact / filtration tank is installed in the lower part of the filter for removing the stream water and lake water, characterized in that the air supply pipe 585 is installed to be configured to supply air  The method of claim 1, The artificial wetland 800 detects the water level at the level switch 720 of the treatment tank 700 so that excess water can be forced to the river or the lake so that the water level can be adjusted by opening and closing the auto valve 730. Purification apparatus for river water and lake water. The method of claim 1, The median layer of the first upstream contact / filtration tank has a coarse gravel layer 520 having a particle diameter of 60 to 70 mm, 30 to 45 mm, 10 to 15 mm, and 2 to 5 mm from the bottom, the intermediate gravel layer 530, and the granular zeolite layer 540, respectively. ), Purification apparatus for river water and lake water, characterized in that the multi-layer structure laminated the active alumina layer (550). The method of claim 1, Secondary upflow contact / filtration layer of the filter layer is characterized in that the stream of the river and lake water purification device characterized in that the configuration. The method of claim 1, The filter layer of the first and second upstream contact / filtration tank is characterized in that the individual filter is filled in the module case consisting of a plate of the porous substructure structure. The method of claim 4, wherein  The median layer of the first upstream contact / filtration tank has a coarse gravel layer 520 having a particle diameter of 60 to 70 mm, 30 to 45 mm, 10 to 15 mm, and 2 to 5 mm from the bottom, the intermediate gravel layer 530, and the granular zeolite layer 540, respectively. ), The purification device of river water and lake water, characterized by consisting of a garnet (Garnet) having a particle diameter of 1 ~ 2mm. The method of claim 4, wherein The filter layer of the first upstream contact / filtration tank has a thick gravel layer 520 having a particle diameter of 60 to 70 mm, 30 to 45 mm, 10 to 15 mm, and 2 to 5 mm, a middle gravel layer 530, and a particle diameter of 15 to 20 mm, respectively, from below. Purifier for river water and lake water, characterized in that the diatomaceous earth having a particle diameter of 1.5 ~ 3.0mm that can remove the oil and laminated in a multi-layer structure. The method of claim 4, wherein The median layer of the first upstream contact / filtration tank has a coarse gravel layer 520 having a particle diameter of 60 to 70 mm, 30 to 45 mm, 10 to 15 mm, and 2 to 5 mm from the bottom, a middle gravel layer 530, and a particle diameter of 1 to 2 mm, respectively. And 0.7 to 1.5 mm of anthracite layer to purify the stream water and lake water characterized in that the laminated structure. The method of claim 4, wherein The filter layer of the first upflow contact / filtration tank is composed of an intermediate gravel layer with a particle diameter of 30 to 45 mm, a granular zeolite layer with a particle size of 10 to 15 mm from the bottom, activated carbon with a particle size of 5 to 15 mm, which is effective for removing additional ammonia nitrogen, Purification apparatus for river water and lake water, characterized in that the laminated structure consisting of a layer of activated alumina having a particle diameter of 2 to 5mm in a multilayer structure. The method of claim 1, Artificial wetland is composed of 50 ~ 100mm, 100 ~ 200mm, 50 ~ 100mm heights of gravel layer of about 10 ~ 20mm, sand loam layer, and porous ceramic layer of 5 ~ 10mm, respectively, for further removal by adsorption. Stream and lake water purification device, characterized in that consisting of units filled with. The method of claim 1, Continuously arranged purifier of the same structure consisting of the mesh screen, the settling basin, the distribution pipe, the first upstream contact / filtration tank, the second upstream contact and filtration tank, the treatment tank so as to connect to the treatment tank (700). Purification apparatus for river water and lake water. The method of claim 1, A stream water and lake water purification device, characterized in that the first upstream contact / filtration tank 500, the second upstream contact and filtration tank 600 and the treatment water tank 700 buried underground.

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