KR101867781B1 - Waste water treatment system - Google Patents

Abstract

The present invention provides a wastewater precipitation system having an FEBT tank. The wastewater precipitation system includes: a microorganism reactor for reducing the concentration of wastewater by injecting air and microorganism into wastewater; at least an aeration tank treating organic matter by aerating the wastewater flowing inside from the microorganism reactor and enabling the aerated wastewater to come into contact with sludge; a sedimentation basin settling the sludge contained in treated water as the treated water treated in the aeration tank flows inside the sedimentation basin, wherein the sedimentation basin discharges supernatant; and a transmitting pump installed in a sludge transfer path connecting the sedimentation basin and the aeration tank and transmitting the sludge settled in the sedimentation basin to the aeration tank or transferring the sludge to a sludge treatment tank. Therefore, the wastewater precipitation system includes the microorganism reactor and constantly maintains treatment efficiency of the organic matter about change of the concentration and flow rate of the wastewater.

Description

Waste water treatment system with FEBT tank [

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wastewater collection system for treating wastewater.

In recent years, along with the development of industry, a lot of wastewater has been generated in various factories and homes, and various regulations related to the treatment of wastewater have been strengthened in order to prevent pollution of natural environment and destruction of ecosystem due to unauthorized discharge of wastewater.

Wastewater is a concept that includes all contaminated water, and contains a large amount of solid matter in the wastewater. In this conventional wastewater collection system, when a high concentration of organic wastewater flows, the microorganism sludge and wastewater are separated and discharged at a predetermined concentration through the pretreatment process, or the wastewater whose concentration is partially lowered is discharged after reprocessing by the standard activated sludge method.

However, the conventional wastewater collection system has a problem in that the organic matter treatment efficiency can not be maintained constant against the flow rate and the concentration change of the introduced wastewater.

Korean Patent Publication No. 10-0649099 (entitled "Nitrogen in Wastewater Using Injection Upstream Reactor, High Intensity Treatment Apparatus")

It is an object of the present invention to provide a wastewater and water precipitation system capable of coping with wastewater flow rate and concentration variations.

In order to accomplish the above object, according to one aspect of the present invention, there is provided a wastewater treatment system comprising: a microorganism reaction tank for reducing the concentration of wastewater through decomposition of organic matter by introducing microorganisms and air into wastewater; At least one aeration tank for treating the organic matter by bringing the wastewater introduced from the microbial reactor into contact with the sludge while giving up the wastewater; A sedimentation tank for introducing treated water treated in the aeration tank to sediment the sludge contained in the treated water and discharging the supernatant; And a transfer pump installed in the sludge transfer path connecting the sedimentation tank and the aeration tank and transferring the sludge settled in the sedimentation tank to the aeration tank or transferring the sludge to the microbial reaction tank.

The microbial reactor is divided into a first FEBT tank and a second FEBT tank. The first FEBT tank and the second FEBT tank are provided with a blower for supplying air, a level gauge for measuring the water level, and a pump for pumping the supernatant to the aeration tank. The first and second flow paths are respectively controlled by a valve and a control unit.

The sedimentation bed has an outer housing having a constant volume to receive raw water therein, a sludge collection groove at the center of the downwardly sloping bottom surface, and a sludge discharge pipe communicating with the sludge collection groove at the bottom; An inner housing which is fixed at an internal height of the outer housing, the lower portion of which opens to communicate with the inside of the outer housing, and the end of the raw water supply pipe is connected to the inside to supply raw water to the inside; A wing plate provided at the lower end of the first shaft for transferring the sludge collected in the sludge collecting groove to the sludge discharge pipe and a drive motor for providing rotational power to the first shaft Sludge transport means; And a second shaft which is spline-coupled to the outside of the first shaft and is capable of interlocking rotation, a sludge which is positioned between the lower end of the second shaft and the lower end of the inner housing and fixed to the second shaft, And a sludge guide means including a conical portion.

And a plurality of sludge guide grooves bent in the rotational direction are formed on the upper surface of the conical part.

The sedimentation paper further comprises a vibration generating means including a rotating shaft spaced a certain distance from the second shaft, a cam eccentrically coupled to the rotating shaft to support the second shaft, and a rotating motor provided to provide a rotating power to the rotating shaft .

As described above, according to the wastewater and water precipitation system of the present invention, it is possible to maintain the efficiency of treatment of organic matter with respect to changes in flow rate and concentration of wastewater flowing into the microorganism reaction tank.

In addition, since the sludge is retained in the sludge for a predetermined period of time by disposing the sedimentation basin, the sludge is discharged to form a favorable condition for microbial activity.

1 is a cross-sectional view of a wastewater collection system according to an embodiment of the present invention.
2 is a cross-sectional view of the clarifier of FIG.
3 is a plan view of Fig.
4 is a sectional view taken along the line III-III in Fig.
5 is an enlarged plan view of the conical portion of Fig.
6 is a sectional view taken along the line V-V in Fig.
FIG. 7 is an enlarged view of 'A' in FIG. 2. FIG.
8 is a cross-sectional view of a wastewater collection system according to another embodiment of the present invention.

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

Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It should be understood that various equivalents and modifications may be present.

1 is a cross-sectional view showing the sedimentation tank of FIG. 1, FIG. 3 is a plan view of FIG. 2, and FIG. 4 is a cross-sectional view taken along the line III- FIG. 5 is an enlarged plan view of the conical portion of FIG. 2, FIG. 6 is a sectional view taken along line V-V of FIG. 5, and FIG. 7 is an enlarged view of portion 'A' of FIG.

1, the wastewater sedimentation system according to an embodiment of the present invention includes a microorganism reaction tank 120 for lowering the concentration of wastewater through the decomposition of organic matter by introducing microorganisms and air into the wastewater, At least one aeration tank 100 for treating the organic matter by contacting with the sludge while giving up the wastewater introduced from the aeration tank 100, and a sedimentation tank for precipitating the sludge contained in the treated water, The sludge settled in the sedimentation tank 200 is conveyed to the aeration tank 100 through the sludge conveyance pipe 11a or installed in the sludge conveying path 211 connecting the sedimentation bed 200 and the aeration tank 100, And a transfer pump 210 for transferring the microorganism to the microorganism reaction tank 120 through the reaction tank feed pipe 211b.

Here, the microbial reaction tank 120 is divided into a first FEBT (Flow Equalization Before Treatment) tank 121 and a second FEBT (Flow Equalization Before Treatment) tank 122. The first FEBT tank 121 and the second FEBT tank 122 121-1 and 122-1 for supplying air and level gauges 121-2 and 122-2 for measuring the water level and pumps 121-1 and 122-2 for pumping the upper water to the aeration tank 100, 3) 122-3 are provided, respectively.

The first FEBT tank 121 and the second FEBT tank 122 are provided with first and second flow paths 121-4 and 122-4 through which wastewater can flow, (122-4) can be controlled by a valve (123) and a control unit (124). At this time, the control unit 124 controls the valve 123, the blowers 121-1 and 122-1, the level gages 121-2 and 122-2, the pumps 121-3 and 122-3, It is preferable to be connected.

According to the microbial reactor according to the embodiment of the present invention, the control unit 124 controls the valve 123 to open the first flow path 121-4 with the two flow paths 122-4 closed, And the high concentration wastewater containing microorganisms is supplied to the tank 121. At the same time, the controller 124 activates the blower 121-1 to supply air into the first FEBT tank 121, thereby separating a large amount of solids contained in the wastewater.

If the level of the first FEBT tank 121 measured in real time from the level gauge 121-2 reaches a certain level, the control unit 124 controls the valve 123 to close the first flow path 121-4 2 flow path 122-4 to open the second FEBT tank 122 to supply a high concentration of wastewater containing microorganisms. At this time, the controller 124 also operates another blower 122-1 to supply air into the second FEBT tank 122, thereby separating a large amount of solid matter contained in the wastewater.

After a predetermined time has elapsed, the control unit 124 stops the operation of the first blower 121-1, so that the solid matter sinks and the supernatant of the first FEBT tank 121 reaches the pump 121-3 To the aeration tank 100. [ When the equalization of the first FEBT tank 121 is completed to some extent, the control unit 124 stops the operation of another blower 122-1, thus sinking the solids and the supernatant of the second FEBT bath 122, And is conveyed to the aeration tank 100 by the suction pipe 122-3.

In this way, the control unit 124 can alternately control the first FEBT tank 121 and the second FEBT tank 122 to pre-treat wastewater of high concentration.

FIG. 8 is a cross-sectional view illustrating a wastewater collection system according to another embodiment of the present invention. The microbial reactor according to another embodiment of the present invention further includes another aeration tank 100-1 at one side of the second FEBT tank 122 as compared with the wastewater water precipitation system of the embodiment, When the wastewater flows into the second FEBT tank 122, the treated wastewater is treated by the wastewater sedimentation system of the embodiment described above. If the wastewater flows into the second aeration tank 122, .

According to the sedimentation bed of the present invention as described above, there is an advantage that the organic matter treatment efficiency can be maintained constant with respect to changes in flow rate and concentration of wastewater flowing into the microorganism reaction tank.

The wastewater flowing from the microorganism reaction tank 120 is subjected to an organic matter treatment process while passing through the aeration tank 100 and the sedimentation tank 200 in order. At this time, in order to increase the organic matter treatment efficiency, aeration tank 100 is formed as many as necessary, and the air supplied from the external blower 110 is blown into the air diffuser 130 formed at the lower end of the aeration tank 100 .

The supernatant generated in the sedimentation tank 200 is discharged to a separate treatment facility or a river or the like and the sludge settled at the lower end of the sedimentation tank 200 is conveyed to the aeration tank 100 or transferred to the sludge treatment tank 400 Discarded or recycled. 2 and 3, the settling sheet 200 includes an outer housing 10; An inner housing 20; Sludge transfer means (30); Sludge guide means (40); Vibration generating means (50); And a sludge collector (60).

The outer housing 10 has a constant volume to receive raw water therein and has a sludge collecting groove 11 at the center of the downwardly sloping bottom surface and a sludge discharge pipe communicating with the sludge collecting groove 11 12 are provided. A bridge 13 capable of supporting a driving motor 33 of a sludge conveying means 30 to be described later may be installed on the upper side of the outer housing 10. The sludge collecting groove 11 is a space for collecting the sludge and the sludge discharge pipe 12 is collected in the sludge collecting groove 11 by the operation of a pump (not shown) installed on the flow path, .

Further, a medicine pump 14 may be further provided at one side of the bridge 13, which is connected to an external chemical tank to supply medicine to the tip of a raw water supply pipe 21 to be described later. When the chemical pump 14 is connected to the raw water supply pipe 21, the raw water is supplied to the inner housing 20 together with the raw water so that the raw water can be agitated smoothly. At this time, a known coagulant is used as the medicine.

The inner housing 20 is fixed to the lower portion of the bridge 13 and is disposed at the inner center of the outer housing 10 so that the lower portion of the inner housing 20 is opened to communicate with the inside of the outer housing 10, And the raw water can be supplied to the inside together with the medicine. At this time, it is preferable that the inner housing 20 has a predetermined length toward the bottom surface of the outer housing 10, and the lower open side is disposed substantially below the water surface. By forming the microbial membrane (S) in the outer housing (10) adjacent to the lower opening side of the inner housing (20) by the raw water supplied to the inside of the inner housing (20), some scattered sludge As shown in FIG.

The outlet port side of the raw water supply pipe 21 is vertically bent in the inside of the inner housing 20 so that the raw water can be sprayed upward.

A guide 22 extending at a predetermined angle in the outward direction may be provided at the lower end of the inner housing 20 to prevent scattering of sludge that flocculates and sinks.

The sludge conveying means 30 includes a first shaft 31 which is erected in the center of the inner housing 20 and is rotatable and a sludge collecting groove 11 provided at the lower end of the first shaft 31, A wing plate 32 for feeding the worm wheel 12 to the first shaft 31 and a driving motor 33 for providing a rotational power to the first shaft 31. A plurality of fastening protrusions 31a are formed on the outer circumferential surface of the first shaft 31 in the longitudinal direction thereof as shown in Figure 4. The drive motor 33 is connected to a bridge 13).

The sludge guide means 40 includes a second shaft 41 splined to the outside of the first shaft 31 and capable of interlocking rotation, a second shaft 41 located between the lower end of the second shaft 41 and the lower end of the inner housing 20 And a conical part 42 fixed to the second shaft 41 with a conical upper surface and scattering the sludge that has settled on the upper surface thereof to the outer periphery of the outer housing 10.

As shown in FIG. 4, the inner circumferential surface of the second shaft 41 is formed with a plurality of engaging grooves 41a through which the engaging projections 31a of the first shaft 31 are inserted in the longitudinal direction thereof.

As shown in FIG. 5, a plurality of sludge guide grooves 42a bent in the rotating direction may be formed on the upper surface of the conical portion 42. The sludge guide grooves 42a may be formed so as to narrow the width D from the center to the outer periphery so as to increase the discharge flow rate of the sludge. Referring to FIG. 6, the sludge guide groove 42a is formed to be wired . In addition, a coupling hole 42b to which the second shaft 41 is coupled may be provided at the center of the conical portion 42.

On the other hand, the vibration generating means 50 is provided to maintain the re-performance of the sludge guiding means 40 by eliminating the sludge fixed to the surface of the conical portion 42. More specifically, as shown in FIG. 7, the vibration generating means 50 includes a support shaft 51, which is spaced apart from the support shaft 51 by a predetermined distance in a direction perpendicular to the longitudinal direction of the second shaft 41, A cam portion 52 for supporting the second shaft 41 and a rotation motor 53 provided to provide a rotation power to the support shaft 51. [

The vibration generating means 50 described in the present embodiment may be disposed inside the conical portion 42 of the sludge guiding means 40 in the figure but may be appropriately disposed at a position where it is not disturbed from the rotating structures. That is, the support shaft 51 and the rotary motor 53 are fixed members so that the support shaft 51 and the rotary motor 53 are installed inside the outer housing 10 or outside the inner housing 20 to transmit power to the cam portion 52 , And the cam portion 52 may be installed to support the second shaft 41 by contacting the lower end of the second shaft 41.

The vibration generating means 50 may have a structure that can induce vibration of the conical portion 42 integrally coupled to the second shaft 41 by inducing rapid vertical movement of the second shaft 41, As a matter of course, it is of course possible to provide the vibration generating means 50 in the bridge 13 to generate the vibration of the first shaft 31 in correspondence with the upper end of the first shaft 31.

The sludge collector 60 includes a plurality of extension bars 61 disposed radially in the lower side of the first shaft 31 so as to be parallel to the bottom surface of the outer housing 10, A plurality of scrapers 62 provided so as to be in close contact with the bottom surface of the outer housing 10 in the longitudinal direction of each elongated bar 61 so as to collect the settled sludge in the sludge collecting groove 11, 61 and a support bar 63 coupled to the first shaft 31 by hinges 63-1, 63-2. Each of the elongated bars 61 is disposed parallel to the bottom surface of the outer housing 10 so as to be inclined upwards at a predetermined angle toward the outer periphery. The support bar 63 supports the load of the extension bar 61 to prevent the extension bar 61 from sagging. The scraper 62 may sweep the bottom of the outer housing 10 while rotating together with the first shaft 31 to move the sludge to the sludge collecting groove 11. [

The reference numeral '15', which is not described in the above, denotes a base portion which is provided at a plurality of outer lower ends of the outer housing 10 to support the outer housing 10.

According to such a sedimentation tank 200, contaminated raw water such as a home or a factory is supplied together with medicines of a coagulating agent through a raw water supply pipe 21, and raw water and medicines are stirred in the inside of the internal housing 20, The solids contained are agglomerated and sludged. At this time, the generated sludge drops downward and sinks on the upper surface of the conical portion 42 rotated by the second shaft 41 in conjunction with the first shaft 31.

The sludge is restrained by the second shaft 41 and rotates at a constant speed so that the dropped sludge enters the sludge guide groove 42a and the sludge placed in the sludge guide groove 42a is centrifuged So that it is scattered to the outer periphery of the outer housing 10. Accordingly, the sludge is settled on the outer bottom surface of the outer housing 10, is sequentially collected in the sludge collecting groove 11 by the sludge collector 60, and discharged to the outside through the sludge discharge pipe 12.

The sludge may be fixed to the surface of the conical portion 42 for a predetermined period of time, which may deteriorate the function of the sludge guiding means 40. When the vibration generating means 50 is operated while the sludge conveying means 30 is stopped, the support shaft 51 is rotated by the power of the rotation motor 53 to rotate the cam portion 52 at a high speed do.

At this time, the cam portion 52, which is in contact with the lower end of the second shaft 41, is eccentrically coupled with respect to the support shaft 51 so that the second shaft 41 is lifted up from the portion having a relatively large radius , The second shaft 41 is caused to vibrate by the fall of the second shaft 41 due to its own weight in a portion having a relatively small radius. Accordingly, the vibration of the conical portion 42 coupled with the second shaft 41 can be induced to desorb the sludge adhering to the surface.

According to the sedimentation bed of the present invention as described above, the sludge is allowed to stay in the sludge for a certain period of time and then discharged, thereby forming a favorable condition for microbial activity.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It is to be understood that various changes and modifications may be made without departing from the scope of the present invention.

10: outer housing 11: sludge collecting groove
12: sludge discharge pipe 13: bridge
14: drug pump 20: inner housing
21: Water supply pipe 22: Guide
30: sludge conveying means 31: first shaft
31a: fastening protrusion 32: wing plate
33: drive motor 40: sludge guide means
41: second shaft 41a: fastening groove
42: conical part 42a: sludge guide groove
42b: coupling hole 50: vibration generating means
51: support shaft 52: cam portion
53: Rotary motor 60: Sludge collector
61: extension bar 62: scraper
63: support bar
100: aeration tank 120: microorganism tank
121: first FEBT group 122: second FEBT group
200: Settling tank 211: Sludge transfer path
211a: sludge return pipe 211b: reaction tank feed pipe

Claims (5)

A microbial reactor for reducing the concentration of wastewater through the decomposition of organic matter by injecting microorganisms and air into the wastewater;
At least one aeration tank for treating the organic matter by bringing the wastewater introduced from the microbial reaction tank into contact with the sludge while giving up the wastewater;
A sedimentation tank for introducing treated water treated in the aeration tank to sediment sludge contained in the treated water and discharging the supernatant; And
And a transfer pump installed in a sludge transfer path connecting the sedimentation tank and the aeration tank and transferring the sludge settled in the sedimentation tank to the aeration tank or transferring the sludge to the aeration tank,
The settler
An outer housing having a constant volume to receive raw water therein and having a sludge collecting groove at the center of a downwardly sloping bottom surface and a sludge discharge pipe communicating with the sludge collecting groove at a lower portion;
An inner housing which is fixed at an internal height of the outer housing and has a lower portion opened to communicate with the inside of the outer housing and an end of the raw water supply pipe is connected to the inside to supply raw water to the inside;
A wing plate provided at a lower end of the first shaft for transferring the sludge collected in the sludge collecting groove to the sludge discharge pipe; A sludge conveying means including a driving motor for conveying the sludge;
A second shaft which is spline-coupled to the outside of the first shaft and is capable of interlocking rotation; a sludge fixed to the second shaft and positioned between the lower end of the second shaft and the lower end of the inner housing, A sludge guiding means including a conical portion scattered to the outside; And
A vibration generating means including a rotation shaft spaced apart from the second shaft by a predetermined distance, a cam portion eccentrically coupled to the rotation shaft to support the second shaft, and a rotation motor provided to provide rotation power to the rotation shaft;
Wherein the wastewater is pumped by the wastewater. The method according to claim 1, wherein the microbial reaction tank
The first FEBT tank and the second FEBT tank are provided with a blower for supplying air, a level gauge for measuring the water level, and a pump for pumping the supernatant to the aeration tank,
Wherein the first FEBT tank and the second FEBT tank are respectively provided with first and second flow paths through which wastewater can flow, and the first and second flow paths are controlled by a valve and a control unit. delete 2. The apparatus according to claim 1, wherein an upper surface of the conical portion
Wherein a plurality of sludge guide grooves bent in a rotating direction are formed in a plurality of sludge guide grooves. delete

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