KR200336701Y1 - Polluted river-water purification system using direct aeration - Google Patents

Abstract

The present invention is biologically adsorbed and oxidized using high concentration microorganisms attached to string microorganism contacting materials, which are installed in sewage treatment facilities, rivers and lakesides, and contain organic materials, suspended matters and nutrients contained in sewage and polluted river and lake water. The present invention relates to a catalytic oxidation type purifying apparatus for decomposing and purifying, and more particularly, by installing a plurality of diffusers in a lower part of a contact oxidation tank in which a plurality of string-like microbial contact materials are installed, and directly aeration of the string-like microbial contact materials through the diffuser. Floating materials and sludge adhering to the microbial contact material are smoothly removed to prevent the effective microbial contact area is reduced, and the sludge and the suspended matter floating by direct aeration are settled through the settling and filtration tanks installed downstream of the contact oxidation tank. Separation improves the efficiency of catalytic oxidation and improves the quality of the effluent. It relates directly to the aeration formula contaminated rivers purifier that.

The present invention consists of an inflow facility, a sedimentation basin, a contact oxidation tank, and a discharge facility installed on a river or lakeside, and the stream water and lake water that have passed through the settling basin are introduced into a contact oxidation tank filled with a plurality of string-like microbial contact materials. In a polluted river purification apparatus for adsorbing and decomposing contained suspended matter and organic matter by a high concentration of microorganisms, it is installed on the bottom of the contact oxidizing tank to be aerated directly to the string-like microbial contact material A plurality of diffusers for smooth detachment of attached suspended solids and sludge; And a sedimentation tank separately installed downstream of the contact oxidation tank so as to separate sludge and suspended matter desorbed by the direct aeration of the diffuser.

Description

Polluted river-water purification system using direct aeration

The present invention is installed in sewage treatment facilities or rivers and lakesides, and the organic and suspended solids contained in sewage, polluted river water and lake water are biologically adsorbed and oxidatively decomposed using high concentration microorganisms attached to sticky microbial contact materials. The present invention relates to a catalytic oxidation type purifying apparatus, and more particularly, a plurality of diffusers are installed in a lower portion of a contact oxidation tank in which a plurality of string-like microbial contact materials are installed, and the string-like microbial contact materials are directly aerated through the diffuser. By removing the suspended substances and sludge adhering smoothly to prevent the effective microbial contact area is reduced, by contacting by separating the sludge and suspended substances floating by direct aeration through the settling tank and filtration tank installed downstream of the contact oxidation tank To improve the efficiency of oxidation and improve the quality of effluent It relates to a contact aeration formula contaminated rivers purifier.

Rapid urbanization and industrialization, diversified lifestyles, increased use of chemical fertilizers, and increased livestock scale due to increased meat consumption have led to the influx of polluted water containing large quantities of organic matter and nutrients (nitrogen and phosphorus) into rivers and lakes. As a result, the balance of ecosystems in the body of water is being destroyed. In particular, the river's self-cleaning ability is greatly lost by strengthening the stream and dredging the bottom of the river for the efficient use of land. Therefore, it is preferable to block or purify contaminated water before entering streams and lakes, but blocking or purifying all non-point sources such as chemical fertilizers used by farmers and livestock wastewater discharged from livestock farms is practical. As it is impossible.

Accordingly, in recent years, a method of purifying pollutants by directly installing a purification device in a river or an lake, and treating polluted river water or lake water by introducing it into a purification device installed at a riverside, for example, artificial wetlands or contact oxidation tanks, Purification technology is in the limelight to return water back to rivers and lakes.

That is, the purification apparatus for polluted rivers and lakes according to the prior art shown in FIG. 1 (hereinafter referred to as 'polluted river purifier') is installed around streams or lakes to clean polluted streams and lakes. A purifying apparatus, comprising: flowing stream water and lake water that have passed through a settled land into a contact oxidation tank (1) filled with a plurality of string-like microbial contact materials (3) so that suspended matter and organic matter contained in the river water and lake water can be transferred to a high concentration of microorganisms. By adsorption, decomposition and purification. In particular, the conventional contaminant stream purification apparatus is installed vertically between the string-like microbial contact material 3, the draft tube 5 of the predetermined diameter and indirectly aerated through the diffuser 7 installed on the bottom of the string-like microbial contact material It prevents microorganisms from detaching from (3). And the sludge detached from the string-like microbial contact material (3) is characterized in that it is configured to precipitate in the sludge port (9) formed on the bottom surface of the contact oxidation tank (1).

However, in Korea's river water and lake water where the concentration of suspended solids and organic matters are high and the water quality changes severely with time, the effective contact area of effective microorganisms is greatly reduced because microorganisms and suspended solids are excessively propagated or adhered to the surface of string-like microbial contact materials This lowers the treatment efficiency of the entire oxidation treatment tank. For example, at the time of shipment, the effective contact area of the string-like microbial contact material is 1 m 2 / m or more, but after a certain period of time, the surface of the string-like microbial contact material is excessively attached to the microorganisms and suspended solids and is deformed into a round bar shape. When starred in such a round shape, the effective contact area is reduced to 0.16 m 2 / m or less, thereby reducing the effective effective microbial contact area by about 84% or more.

However, the stream pollution purification apparatus according to the prior art is a method of indirect aeration using the diffuser 7 formed on the bottom of the cylindrical draft tube 5, that is, the water flow generated by the bubbles discharged from the diffuser 7 Since it does not directly reach the string-like microbial contact material (3), the water flow shear force is very weak, it was not possible to detach the suspended matter and sludge attached to the string-like microbial contact material (3). Therefore, if the driving time for a certain time, the string-like microorganism contact material (3) is deformed in the form of a round bar, there is a problem that the effective microorganism retention amount is reduced and the treatment efficiency and processing capacity is greatly reduced, in order to prevent the string-like microorganism contact material (3) often There was a problem that management operation is difficult because it must be replaced.

In addition, the pollutant stream purifying apparatus according to the prior art is to install the sludge port (9) in the lower portion of the contact oxidation tank (1) to sediment and concentrate the desorbed suspended solids and sludge is supplied through the draft tube (5) Since a continuous stream of water is formed by air, fine suspended solids and fine sludge do not settle and are discharged as discharged water, so that the quality of the discharged water falls. In addition, due to the sludge port 9 formed on the bottom surface there was also a problem that the substantial volume of the contact oxidation tank (1) is reduced.

In addition, the pollutant stream purifying apparatus according to the prior art is microbiologically oxidatively decomposed using only native microorganisms, and thus, it is difficult to process humic substances that are difficult to be decomposed by native microorganisms even though they are included in many river waters or lakes in Korea. There was a problem.

Accordingly, the main object of the present invention is to generate a strong water flow by directly aeration of a contact oxidation tank filled with a plurality of string microbial contact materials to a plurality of diffusers to smoothly detach suspended solids and microbial sludge attached to the string microbial contact materials. By preventing the deformation in the form of a round bar to prevent the effective microbial contact area is reduced to improve the treatment efficiency as well as to provide a pollution stream purification device that is more convenient to maintain.

The present invention also allows the fine sludge and sludge to be discharged as it is by sedimentation of sludge and suspended solids detached by direct aeration of the contact oxidation tank through a separate settling tank installed downstream of the contact oxidation tank or filtered in a separate filtration tank. It is to provide a polluted river purification apparatus to prevent and improve the quality of the discharged water.

In addition, the present invention provides a pollutant stream purification device that can improve the treatment efficiency of contaminated river water and reduce the amount of sludge by injecting microorganisms having excellent resolution to hardly decomposable substances such as humic substances at the front end of the contact oxidation tank. It is.

1 is a cross-sectional view schematically showing a polluted river purification apparatus according to the prior art,

Figure 2 is a schematic cross-sectional view showing a polluted river purification apparatus according to the present invention,

Figure 3 is a cross-sectional view showing a preferred embodiment of the pollutant stream purification apparatus according to the present invention,

4 is a partially exploded perspective view of the polluted river purification apparatus shown in FIG. 3;

Figure 5 is a cross-sectional view schematically showing a sedimentation tank applied to the pollutant river purification apparatus according to the present invention,

Figure 6 is a cross-sectional view schematically showing a filtration tank applied to the pollutant river purification apparatus according to the present invention,

Figure 7 is a cross-sectional view schematically showing an adsorption tank applied to the pollutant river purification apparatus according to the present invention,

8 to 11 is a schematic configuration diagram showing various configurations of the pollutant river purification apparatus according to the present invention,

12 and 13 is a schematic cross-sectional view showing a microorganism input equipment installed in the front end of the contact oxidation tank according to the present invention.

***** Description of the symbols for the main parts of the drawings ****

10: contact oxidation tank 15: frame

16: opening 20: sedimentation tank

22: inclined plate 24, 44, 64: hopper

26: sludge drawing pipe 28: cleaning device

30: sticky microbial contact material 31: microbial contact material unit

32: upper frame 33: lower frame

40: filtration tank 42: fixed filtration layer

50: diffuser 60: adsorption tank

65: adsorption layer 80: microorganism injection device

In order to achieve the above object, the direct aeration polluted stream purifying apparatus according to the present invention is composed of an inflow facility, a sedimentation basin, a contact oxidation tank, and a discharge facility installed on a river or lakeside, and passes the river and lake water that have passed through the sedimentation basin. In the contaminated river purification apparatus that flows into the contact oxidation tank filled with a number of string-like microorganism contact material adsorbs and decomposes suspended matter and organic matter contained in the river water and lake water by high concentration microorganisms,

A plurality of diffusers installed on the bottom of the contact oxidation tank so as to directly aerated the string-like microbial contact material to smoothly detach suspended solids and sludge attached to the string-like microbial contact material;

Characterized in that it comprises a sedimentation tank separately installed downstream of the contact oxidation tank so as to separate the sludge and suspended matter detached by the direct aeration of the diffuser.

In addition, the present invention is characterized in that it comprises a filter tank separately installed downstream of the settling tank in order to filter fine suspended matter contained in the treated water precipitated through the settling tank.

The present invention is also characterized in that it further comprises an adsorption tank installed separately downstream of the filtration tank to adsorb the malodorous components and harmful substances contained in the treated water filtered through the filtration tank.

The present invention is also characterized in that the injection means for injecting microorganisms having a high resolution for the hardly decomposable substances in order to biologically oxidatively decompose the hardly decomposable substances contained in the contaminated river water, characterized in that further installed in the front end of the contact oxidation tank do.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the direct aeration polluted river purification apparatus according to the present invention.

First, Figure 2 is a cross-sectional view schematically showing a direct aeration pollutant stream purifying apparatus according to the present invention, as shown, the contact oxidation tank 10 of the present invention is a rectangular reaction tank having a predetermined size, the contact oxidation The upper part of the tank 10 is provided with a plurality of string-like microbial contact material 30, the bottom of the plurality of diffuser 50 is installed evenly throughout, the downstream direction of the contact oxidation tank 10, That is, a separate sedimentation tank 20 for sedimentation of sludge containing microorganisms is installed at the rear stage.

As such, the present invention is directly aerated into a plurality of acid engines 50 installed at the bottom of the string-like microbial contact material 30, that is, the water flow generated by the bubbles discharged from the acid pipes directly affects the string-like microbial contact material 30. By using the strong water flow shear force generated at this time to desorb the microorganisms or suspended solids excessively attached to the surface of the string-like microbial contact material (30). And the sludge floated by the direct aeration is to precipitate in the sedimentation tank 20 separately installed downstream of the contact oxidation tank (10).

3 and 4 are side cross-sectional and partial exploded perspective views showing a preferred embodiment of the contact oxidation tank 10 applied to the direct aeration pollutant purification apparatus according to the present invention. As shown, the contact oxidation tank 10 according to the present invention is a rectangular reaction tank having a predetermined size, preferably divided into a plurality of reaction tanks 12, 13, 14 by a plurality of partitions (11). A rectangular frame-shaped frame 15 is fixed to the upper portion of each reactor, and a plurality of microbial contact material units 31 are provided through a plurality of openings 16 partitioned by the frame 15. .

The microbial contact unit 31 is a plurality of between the upper frame 32 having a size slightly larger than the opening 16 of the frame 15 and the lower frame 33 of a size slightly smaller than the opening 16 The string-like microbial contact material 30 is installed. That is, the microbial contact material unit 31 is a reciprocating installation of a plurality of string-like microbial contact material 30 in the vertical direction between the grating-shaped upper frame 32 and the lower frame 33, the frame 15 It is to be completely immersed in the reaction tank 12, 13, 14 through the opening 16 of the.

In addition, a plurality of diffusers 50 are uniformly installed on the bottom of the contact oxidation tank 10. That is, the contact oxidation tank 10 according to the present invention is different from the conventional diffuser installation method, which is installed only at a specific part, so that the contact oxidation tank is aerated as a whole by uniformly installing a plurality of diffusers 50 at predetermined intervals. It is. As such, the present invention is excessively applied to the string-like microbial contact material 30 by using the strong water flow generated by the air bubbles injected into the upper part through a plurality of diffuser (50) installed in the lower portion of the string-like microbial contact material (30). It is to prevent the attachment of microorganisms and suspended solids.

On the other hand, the organic material contained in the contaminated river water introduced through a known inlet facility and settling is biologically oxidatively decomposed by the microorganisms attached to the sticky microbial contact material 30, the contact oxidation tank according to the present invention ( 30) since the strong water flow is formed by the diffuser 50, the amount and speed of air injected by the diffuser 50 should be appropriately adjusted according to the amount of microorganisms attached to the string-like microbial contact material 30. .

On the other hand, since the contact oxidation tank 10 is directly aerated through a plurality of diffusers 50, sludge and suspended solids detached from the string-like microbial contact material 30 does not settle down to the contact oxidation tank 10. They will be suspended. Therefore, the desorbed sludge should be removed from the settling tank 20 separately installed at the rear end of the contact oxidation tank 10. As shown in FIG. 5, the settling tank 20 is a rectangular reaction tank, and a plurality of inclined plates 22 are inclined at a predetermined angle in an upper portion thereof, and a hopper 24 formed of a predetermined inclined surface is formed in a lower portion thereof. . Therefore, a relatively large sludge flop of the treated water introduced from the contact oxidation tank 10 immediately settles toward the hopper 24, and the relatively fine sludge floc rises along the flow of upflow and contacts a plurality of inclined plates 22. To form a larger floc and then settle back towards the hopper 24. And the sludge precipitated in the hopper 24 is discharged to the concentration tank through the sludge drawing pipe 26. Reference numeral 28 is a cleaning device including a plurality of diffusers for cleaning the inclined plate (22).

6 is a cross-sectional view schematically showing the filter tank 40 separately installed downstream of the settling tank 20 to remove the suspended substances contained in the treated water precipitated in the settling tank 20. As shown, a fixed filtration layer 43 is formed in the upper portion of the filtration tank 40 is filled with a plurality of media, preferably a rope-shaped media (41), the lower portion of the hopper having an inclined surface ( 44) is formed. Therefore, the treated water introduced between the fixed filtration layer 43 and the hopper 44 rises in an upward flow to filter the suspended solids while passing through the fixed filtration layer 43. Then, the treated water passing through the fixed filtration layer 43 is discharged through the ware and the suspended solids attached to the fixed filtration layer 43 are separated and settled toward the hopper 44 to separate the sludge drawing pipe 26. It is discharged to the outside through. On the other hand, the lower portion of the fixed filtration layer 43 is provided with a washing device 28 including a plurality of diffuser to wash the microorganisms or suspended substances excessively attached to the fixed filtration layer 43.

7 is a schematic cross-sectional view showing an adsorption tank 60 separately installed at the rear end of the filtration tank 40 for removing odorous substances or harmful substances contained in the treated water filtered through the filtration tank 40. to be. As shown, the adsorption tank 60 is a rectangular or cylindrical reaction tank, and is preferably divided into two reaction tanks 61 and 62. In addition, an adsorption layer (65) filled with an adsorbent having excellent adsorption capacity such as zeolite and activated carbon at a predetermined height is formed at an upper portion of each reaction tank, and at the lower end thereof, a porous plate (or grating) for supporting the adsorption layer (65); 66 is provided, and a hopper 64 having a predetermined inclined surface is formed at the bottom of the porous plate 66, respectively. Therefore, the treated water flowing into the upper portion of the adsorption layer 65 of the one side reaction tank 61 descends through the adsorption layer 65 of the one side reaction tank while adsorbing odorous components or harmful substances, and again the adsorption layer 65 of the other side reaction tank 62. As it rises through), odor component or harmful substance is adsorbed. And the adsorbent debris discharged to the adsorption layer 65 is lowered toward the hopper 64 by gravity and discharged to the outside through the sludge drawing pipe 26.

Subsequently, Figures 8 to 10 are schematic views showing various embodiments of the direct aeration pollutant stream purifying apparatus according to the present invention, Figure 8 is a front end of the contact oxidation tank 10 described above known inlet equipment ( 17) and the settling basin 18 and downstream of the contact oxidation tank 10, the settling tank 20 and the discharge facility 19 is installed, the sludge produced in the direct aeration contact oxidation tank 10. It is configured to settle and discharge, Figure 9 is installed in the settling tank 20 in the rear end of the settling tank 20 to remove the suspended substances contained in the treated water precipitated in the settling tank 20 described above 10 is a case in which the adsorption tank 60 is separately installed at the rear end of the filtration tank 40 in order to remove odor components and harmful substances contained in the treated water filtered in the filtration tank 40 described above. 11 is a front end of the contact oxidation tank 10 The resolution of the recalcitrant substances by installing the microorganism input equipment (80) to a case where to inject the high microorganism. As described above, the direct aeration pollutant stream purifying apparatus according to the present invention can improve treatment efficiency by installing various reaction tanks at the front end or the rear end of the direct aeration contact oxidation tank.

12 and 13 are cross-sectional views showing a preferred embodiment of the microorganism input equipment 80 installed at the front end of the contact oxidation tank 10, a part of the raw water flowing into the contact oxidation tank 10 is the dissolution tank 83 It is injected via gas. At this time, the liquid phase microbial agent 87 is supplied by diluting to a suitable concentration in the dissolution tank 83 and the solid phase microbial agent 86 is placed in the pore box 85 and gradually dissolved. In addition, it is also possible to directly dissolve the solid-state microbial agent 86 into the contact oxidation tank (10).

As described above, the pollutant stream purifying apparatus according to the present invention generates a strong water flow by directly aeration of a contact oxidation tank filled with a plurality of string-like microbial contact materials to a plurality of acid pipes, thereby causing floating water and microorganisms attached to the string-like microbial contact materials. By removing the sludge smoothly to prevent deformation into a round rod shape, the effective microbial contact area is prevented from being reduced, thereby improving the treatment efficiency.

In addition, the pollutant stream purifying apparatus according to the present invention is a fine suspended solids by sedimentation and sedimentation in a separate sedimentation tank installed downstream of the contact oxidation tank or by filtering in a separate filtration tank sludge and suspended matter detached by the direct aeration of the contact oxidation tank The sludge is prevented from being discharged as it is, thereby improving the quality of the discharged water.

In addition, the pollutant stream purifier according to the present invention injects microorganisms having excellent resolution to hardly decomposable substances such as humic substances into the front end of the contact oxidation tank, thereby improving the treatment efficiency of contaminated river water and reducing the amount of sludge generated. It works.

The pollutant stream purifying apparatus according to the present invention has an effect of preventing obstruction by sludge and inflow suspended matter and smoothing the flow of treated water by using a sticky microbial contact member unit having a large pore size, a regular arrangement, and a small loss head.

Claims (8)

It is composed of inflow equipment, sedimentation basin, contact oxidation tank, and discharge facility installed in river or lakeside, and the stream and lake water that have passed through the settlement were introduced into contact oxidation tank filled with a number of string-like microorganism contact materials. In the contaminated river purification device that absorbs and decomposes substances, organic substances and nutrients by high concentration microorganisms, A plurality of diffusers installed on the bottom of the contact oxidation tank so as to directly aerated the string-like microbial contact material to smoothly detach suspended solids and sludge attached to the string-like microbial contact material; And a sedimentation tank separately installed downstream of the contact oxidation tank so as to separate sludge desorbed by the direct aeration of the diffuser and suspended solids. The method of claim 1, In order to filter the fine suspended solids contained in the treated water precipitated through the sedimentation tank, the filtration tank is installed separately downstream of the sedimentation tank, and odor components and harmful substances contained in the treated water filtered through the filtration tank are adsorbed. Direct aeration pollutant stream purification apparatus, characterized in that further comprises a adsorption tank installed separately downstream of the filtration tank. The method of claim 1, Direct aeration is characterized in that the front end of the contact oxidizing tank is further provided with a separate microbial injection means for injecting microorganisms having excellent degradability for the hardly decomposable material to biologically oxidatively decompose the hardly decomposable material contained in the contaminated river water Contaminated River Purification System. The method of claim 1, The contact oxidation tank is installed inside the reaction tank through a plurality of reaction tanks partitioned by a plurality of partition walls, a rectangular frame shape fixed at an upper portion of each reaction tank, and a plurality of openings partitioned by the frame, and more than the openings of the frame. A microbial contact unit comprising a plurality of string-like microbial contact members installed between an upper frame having a slightly larger size and a lower frame having a smaller size than the opening, and a plurality of diffusers installed uniformly on the bottom of the contact oxidizing tank. Direct aeration polluted river purification apparatus, characterized in that configured to include. The method of claim 1, The settling tank includes a plurality of inclined plates installed to be inclined at a predetermined angle on the upper part of the reaction tank, a hopper consisting of a predetermined inclined surface on the lower part of the reaction tank, a washing device provided between the inclined plate and the hopper, and a sludge drawing pipe installed at the bottom of the hopper. Direct aeration polluted river purification apparatus, characterized in that configured to include. The method of claim 2, The filtration tank is a fixed filtration layer filled with a plurality of media in the upper portion of the reaction tank, a hopper having a predetermined inclined surface in the lower portion of the reaction tank, a washing device consisting of a plurality of diffusers installed in the lower portion of the fixed filtration layer, and the hopper Direct aeration polluted river purification apparatus comprising a sludge drawing pipe installed at the bottom of the. The method of claim 2, The adsorption vessel includes two reaction vessels partitioned from side to side, an adsorption layer filled with adsorbents having excellent adsorption capacity such as zeolite and activated carbon at a predetermined height in the upper portion of each reaction vessel, and a porous plate provided at a lower end thereof to support the adsorption layer. And a hopper having a predetermined inclined surface at the bottom of the porous plate. The method of claim 3, The microbial injection means is a direct aeration polluted river purification apparatus, characterized in that it comprises a dissolution tank via some of the raw water installed in the front end of the contact oxidation tank, and a pore box installed in the dissolution tank containing a solid-phase microbial agent.