Continuous flow aerobic granular sludge treatment device

Abstract

The utility model discloses a continuous flow aerobic granular sludge treatment device. The continuous flow aerobic granular sludge treatment device comprises an anaerobic zone, an aerobic zone and a plurality of aerobic granular sludge generation modules, the anaerobic zone and the aerobic zone are both of a circular structure, the anaerobic zone is arranged in the aerobic zone, sewage can conveniently enter the aerobic zone through a plurality of water outlets after flowing through the anaerobic zone, the design that the anaerobic zone is directly arranged in the aerobic zone is adopted, the sewage can directly flow into the aerobic zone from the plurality of water outlets formed in the anaerobic zone, and the sewage treatment efficiency is improved. According to the sewage treatment system, a complex pipeline system and a radiation flow flowing mode are not needed, so that blind areas are reduced, water flows in from a plurality of water outlets in the circumferential direction when flowing through the aerobic zone, the flow speed is more uniform, the interference of a turbulent flow phenomenon on contact and reaction of microorganisms and pollutants is reduced, and the whole sewage treatment system is smaller in occupied area.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of sewage treatment, and particularly relates to a continuous-flow aerobic granular sludge treatment device. BACKGROUND

[0002] At present, most of the sewage treatment plants in China adopt the activated sludge process, which has good treatment effect and simple operation, but as the water resource problem is increasingly serious and the water pollution problem is increasingly severe, the traditional activated sludge treatment process cannot meet the existing discharge standard, so the aerobic granular sludge treatment process emerges as the times require, which is a kind of granular sludge formed by self-growth and self-coagulation of microorganisms under aerobic conditions, and has the advantages of compact structure, good settling performance, good treatment effect, simultaneous removal of nitrogen and phosphorus, and removal of toxic and harmful substances, and has good application prospect.

[0003] Since the aerobic granular sludge treatment process needs to set up multiple treatment tanks, the aerobic granular sludge treatment process occupies a large area; and the sewage flow has blind area, uneven flow rate and turbulent flow phenomenon, which affects the growth of the aerobic granular sludge, so as to affect the treatment efficiency of the sewage; at the same time, the construction cost of the facilities required by the existing aerobic granular sludge treatment process is high. CONTENT OF THE INVENTION

[0004] The present application provides a continuous-flow aerobic granular sludge treatment device to at least solve or alleviate one or more technical problems in the prior art, or at least provide a beneficial alternative.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] A continuous-flow aerobic granular sludge treatment device, comprising an anaerobic zone, an aerobic zone and a plurality of aerobic granular sludge generation modules; the anaerobic zone and the aerobic zone are circular in structure, the anaerobic zone is built-in the aerobic zone, sewage enters the anaerobic zone through a water inlet pipe, a plurality of water outlets communicating with the aerobic zone are arranged at the bottom of the anaerobic zone, the aerobic granular sludge generation modules are uniformly and interval arranged around the inner wall of the aerobic zone, the sewage in the aerobic zone enters the aerobic granular sludge generation modules through the liquid inlet at the upper part of the aerobic granular sludge generation modules, the aerobic granular sludge generation modules return the large-particle-size sludge to the anaerobic zone through the first sludge return pipe to accelerate the nitrogen removal efficiency, and return the small-particle-size sludge to the aerobic zone through the second sludge return pipe to accelerate the growth.

[0007] The continuous-flow aerobic granular sludge treatment device of the application has the aerobic zone arranged around the anaerobic zone, thereby greatly reducing the area occupied by the continuous-flow aerobic granular sludge treatment device, and the sewage enters the aerobic tank from the bottom and enters the inside of the aerobic granular sludge generation module from the top, thereby increasing the flow route of the sewage, facilitating the full contact of the aerobic granular sludge with oxygen, greatly improving the utilization rate of oxygen, so as to be able to reduce the O tank capacity, to further reduce the construction cost, and at the same time, the aerobic air volume is reduced, so that the fan power required by the continuous-flow aerobic granular sludge treatment device is reduced, the equipment investment cost and operation cost are reduced, and the radial flow is adopted, avoiding the flow blind area of the sewage, making the water flow velocity of the sewage more uniform, the aerobic granular sludge more dispersed, and the aerobic efficiency higher. The aerobic granular sludge is transported to the aerobic zone and the anaerobic zone for reaction according to the particle size, which promotes the rapid growth of the aerobic granular sludge and improves the denitrification capacity of the continuous-flow aerobic granular sludge treatment device.

[0008] In the preferred implementation, the inlet position of the first sludge return pipe is lower than that of the second sludge return pipe, and the first sludge return pipe corresponds to the distribution area of large-particle sludge; and the second sludge return pipe corresponds to the distribution area of small-particle sludge.

[0009] In the preferred implementation, the first sludge return pipe has a first liquid outlet, and the first liquid outlet is located at the upper part of the anaerobic zone and faces upward; and the second sludge return pipe has a second liquid outlet, and the second liquid outlet is located at the upper part of the aerobic zone and faces upward.

[0010] Since the first liquid outlet is located at the upper part of the anaerobic zone and faces upward, the flow path of the aerobic granular sludge entering the anaerobic zone (A tank) through the first sludge return pipe in the anaerobic zone is increased, so as to further improve the effect of removing COD and N-NH4 in the sewage by denitrification, and improve the effect of secondary decomposition of the aerobic granular sludge to form a nucleus, so as to further increase the number of aerobic granular sludge, and further improve the treatment effect on the sewage.

[0011] The second liquid outlet is located at the upper part of the aerobic zone and faces upward, thereby increasing the flow path of the aerobic granular sludge entering the aerobic zone (O tank) through the second sludge return pipe in the O tank, so as to further make the aerobic granular sludge fully contact with oxygen, and greatly improve the utilization rate of oxygen.

[0012] In the preferred implementation, the aerobic zone has an inner region close to the anaerobic zone and an outer region away from the aerobic zone, the anaerobic zone has a central region and a side region surrounding the central region, the second sludge return pipe includes a first communication section and a first liquid outlet section, the first communication section is in communication with the aerobic granular sludge generation module, and the first liquid outlet section is located in the inner region; the first sludge return pipe includes a second communication section and a second liquid outlet section, the second communication section is in communication with the aerobic granular sludge generation module and extends into the anaerobic zone, and the second liquid outlet section is located in the side region.

[0013] Since the first liquid outlet section is located in the inner region, and the aerobic granular sludge generation module is arranged close to the inner wall of the aerobic zone, i.e., it is located in the outer region, the distance between the first liquid outlet section and the liquid inlet is increased to ensure the flow path of the aerobic granular sludge flowing out of the first liquid outlet section in the aerobic zone, avoid the aerobic granular sludge flowing out of the first liquid outlet section directly entering the aerobic granular sludge generation module through the liquid inlet, ensure the growth effect of the aerobic granular sludge, and improve the treatment effect of the wastewater; the second liquid outlet section is arranged in the side region to enable the wastewater above the side region to flow, so as to avoid the occurrence of a flow blind area in the side region, improve the effect of removing COD and N-NH4 in the wastewater by denitrification, and improve the effect of secondary decomposition of the aerobic granular sludge to form a nucleus.

[0014] In the preferred implementation, the outlet of the second sludge return pipe is higher than the liquid inlet, so that the sinking aerobic granular sludge released from the second sludge return pipe moves in the opposite direction of the upward wastewater, promoting the formation and growth of the aerobic granular sludge.

[0015] The sinking aerobic granular sludge and the upward wastewater form a large friction, which promotes the formation and growth of the aerobic granular sludge, and further improves the treatment effect of the wastewater.

[0016] In the preferred implementation, a sludge sifter is arranged in the aerobic granular sludge generation module, and the first sludge return pipe and the second sludge return pipe are both in communication with the sludge sifter.

[0017] The sludge sifter uses centrifugal force to screen sludge particles. When the wastewater or the mixed liquid enters the sludge sifter at a certain speed along the tangent direction, the mixed liquid rotates under the action of the centrifugal force and the sifter wall. The sludge particles with a larger specific gravity are subjected to a larger centrifugal force, so they are thrown to the wall and rotate downward along the wall to form heavy sludge and sink, while the flocculent sludge and filamentous sludge with a smaller specific gravity are screened out.

[0018] In the preferred implementation, a clear liquid discharge assembly is further included, which includes a ring-shaped water tank arranged at the upper part of the aerobic zone, and the water tank is in communication with an outlet pipe extending to the outside of the aerobic zone.

[0019] In a preferred implementation, the top of the water tank is open to form a clear liquid inlet, and the top of the water tank is connected to a floating resistance structure that can float up and down with the liquid level.

[0020] In a preferred implementation, the water outlet end of the water inlet pipe is located above the anaerobic zone. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and serve to explain the principles of the application. In the drawings:

[0022] Figure 1 An internal structure schematic diagram of one illustrative embodiment of the continuous flow aerobic granular sludge treatment device of the present application is shown.

[0023] Figure 2 A top view structure schematic diagram of one illustrative embodiment of the continuous flow aerobic granular sludge treatment device of the present application is shown.

[0024] Figure 3 A structure schematic diagram of one illustrative embodiment of the sludge sifter of the present application is shown.

[0025] LIST OF ELEMENTS:

[0026] 1-anaerobic zone; 10-water outlet; 2-aerobic zone; 3-aerobic granular sludge generation module; 30-liquid inlet; 4-first sludge return pipe; 5-second sludge return pipe; 6-water inlet pipe; 7-water tank; 8-water outlet pipe; 9-sludge sifter. DETAILED DESCRIPTION

[0027] In the following, only certain example embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present application. Therefore, the drawings and the description are considered to be essentially exemplary rather than limiting.

[0028] In the description of the present invention, it should be understood that the terms "center," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," "axial," "radial," "circumferential," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In the present invention, unless otherwise expressly specified or limited, a first feature being "up" or "down" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium.

[0029] In this utility model, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integration; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or an interaction between two components. However, the phrase "direct connection" indicates that the two connected entities are not connected through an intermediate structure, but are connected to form a whole through a connecting structure. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0030] In this utility model, terms such as "first," "second," etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one of such features.

[0031] The present invention will be described below with reference to the accompanying drawings.

[0032] The specific plans adopted are:

[0033] like Figures 1-3 As shown, the utility model provides a continuous flow aerobic granular sludge treatment device, including an anaerobic zone 1, an aerobic zone 2 and a plurality of aerobic granular sludge generation modules 3; the anaerobic zone and the aerobic zone adopt a circular structure, the anaerobic zone is built into the aerobic zone, the sewage enters the anaerobic zone through the water inlet pipe 6, and the bottom of the anaerobic zone is provided with a plurality of water outlets 10 connected to the aerobic zone. The aerobic granular sludge generation modules are evenly spaced around the inner wall of the aerobic zone, and the sewage in the aerobic zone enters it through the upper liquid inlet 30 of the aerobic granular sludge production module. The aerobic granular sludge generation module returns large-particle sludge to the anaerobic zone through the first sludge return pipe 4 to accelerate the denitrification efficiency, and returns small-particle sludge to the aerobic zone through the second sludge return pipe 5 for rapid growth.

[0034] The continuous-flow aerobic granular sludge treatment device of the present application has the aerobic zone surrounding the anaerobic zone, thereby greatly reducing the area occupied by the continuous-flow aerobic granular sludge treatment device, and the sewage enters the aerobic tank from the bottom and the inside of the aerobic granular sludge generation module from the top, thereby increasing the flow route of the sewage, facilitating the full contact of the aerobic granular sludge with oxygen, greatly improving the oxygen utilization rate, so as to be able to reduce the O tank capacity, to further reduce the construction cost, and at the same time, the aerobic air volume is reduced, so that the power of the fan required by the continuous-flow aerobic granular sludge treatment device is reduced, the equipment investment cost and the operation cost are reduced, and the radial flow is adopted, avoiding the flow blind area of the sewage, making the water flow velocity of the sewage more uniform, the aerobic granular sludge more dispersed, and the aerobic efficiency higher. The aerobic granular sludge is transported to the aerobic zone and the anaerobic zone according to the particle size for reaction, which promotes the rapid growth of the aerobic granular sludge and improves the denitrification capacity of the continuous-flow aerobic granular sludge treatment device.

[0035] Referring to Figure 2 , the inlet position of the first sludge return pipe 4 is lower than that of the second sludge return pipe 5, the first sludge return pipe corresponds to the distribution area of the large-particle sludge, and the second sludge return pipe corresponds to the distribution area of the small-particle sludge. The first sludge return pipe has a first liquid outlet, and the first liquid outlet is located at the upper part of the anaerobic zone and faces upward. The second sludge return pipe has a second liquid outlet, and the second liquid outlet is located at the upper part of the aerobic zone and faces upward.

[0036] Since the first liquid outlet is located at the upper part of the anaerobic zone and faces upward, the flow path of the aerobic granular sludge entering the anaerobic zone (A tank) through the first sludge return pipe in the anaerobic zone is increased, so as to further improve the effect of removing COD and N-NH4 in the sewage by denitrification, and improve the effect of secondary decomposition of the aerobic granular sludge to form a nucleus, so as to further increase the number of aerobic granular sludge, and further improve the treatment effect on the sewage.

[0037] The second liquid outlet is located at the upper part of the aerobic zone and faces upward, thereby increasing the flow path of the aerobic granular sludge in the O tank through the second sludge return pipe into the aerobic zone (O tank), so as to further make the aerobic granular sludge fully contact with oxygen, thereby greatly improving the oxygen utilization rate.

[0038] Referring to Figure 1, the inner side region of the aerobic zone 2 is close to the anaerobic zone 1, and the outer side region of the aerobic zone 2 is far away from the aerobic zone, the anaerobic zone has a central region and a side region surrounding the central region, the second sludge return pipe includes a first communication section and a first liquid outlet section, which correspond to the horizontal pipe and the vertical pipe in the pair respectively, the first communication section is in communication with the aerobic granular sludge generation module, and the first liquid outlet section is located in the inner side region; the first sludge return pipe includes a second communication section and a second liquid outlet section, the second communication section is in communication with the aerobic granular sludge generation module and extends into the anaerobic zone, and the second liquid outlet section is located in the side region.

[0039] Since the first liquid outlet section is located in the inner side region, and the aerobic granular sludge generation module is arranged close to the inner wall of the aerobic zone, i.e. it is located in the outer side region, the distance between the first liquid outlet section and the liquid inlet is increased, so as to ensure the flow path of the aerobic granular sludge flowing out of the first liquid outlet section in the aerobic zone, avoid the aerobic granular sludge flowing out of the first liquid outlet section directly entering the aerobic granular sludge generation module through the liquid inlet, ensure the growth effect of the aerobic granular sludge, and improve the treatment effect on the sewage; the second liquid outlet section is arranged in the side region, so that the sewage above the side region can flow, to avoid the occurrence of a flow blind area in the side region, to improve the effect of denitrification removal of COD and N-NH4 in the sewage, and improve the effect of secondary decomposition of the aerobic granular sludge to form a nucleus.

[0040] As a preferred embodiment of the present application, the outlet of the second sludge return pipe is higher than the liquid inlet, so that the sinking aerobic granular sludge released from the second sludge return pipe moves in the opposite direction to the upward sewage, to promote the formation and growth of the aerobic granular sludge.

[0041] The outlet of the second sludge return pipe is higher than the liquid inlet, which facilitates the discharge of sludge particles from the second sludge return pipe, and the sinking aerobic granular sludge and the upward sewage form a large friction, which promotes the formation and growth of the aerobic granular sludge, to further improve the treatment effect on the sewage.

[0042] As a preferred embodiment of the present application, referring to Figure 3 , the aerobic granular sludge generation module is provided with a sludge screen 9, and the first sludge return pipe 4 and the second sludge return pipe 5 are both in communication with the sludge screen.

[0043] The sludge screen 9 screens sludge particles by centrifugal force. When the sewage or enters the sludge screen in a tangential direction at a certain speed, the mixed liquid rotates under the action of centrifugal force and the screen wall, the shaped sludge particles have large specific gravity, and the centrifugal force they receive is also large, so they are thrown to the wall and rotate downward along the wall to form heavy sludge and sink, and sludge particles of different specific gravity and size are stratified at the bottom, and the flocculent sludge and filamentous sludge with relatively light specific gravity are separated, and the granular sludge can be made to flow into the return pipe by a pump or other power device to realize screening return operation.

[0044] Referring to Figure 2 The supernatant discharge assembly comprises a ring-shaped water tank arranged at the upper part of the aerobic zone, the water tank is communicated with an outlet pipe 8 extending to the outside of the aerobic zone, the top of the water tank is open to form a supernatant inlet, and the supernatant will gradually gather into the supernatant inlet of the water tank along with the rising and flowing of the supernatant, the top of the water tank is connected with a floating resistance structure capable of floating up and down along with the liquid level, the floating resistance structure is not limited in the application, for example, the floating resistance structure can be a wall structure made of foam material, so that the floating resistance structure can float up and down along with the change of the liquid level in the aerobic granular sludge production module, so as to block the granules and prevent the granules from entering the water tank along with the supernatant.

[0045] The parts not described in the utility model can be realized by using or referring to the existing technology.

[0046] The above is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the technical field can easily think of various changes or replacements within the technical range disclosed by the utility model, and these should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. A continuous-flow aerobic granular sludge treatment apparatus, characterized by, The application relates to a sewage treatment device, which comprises an anaerobic zone, an aerobic zone and a plurality of aerobic granular sludge generation modules; the anaerobic zone and the aerobic zone adopt a circular structure, the anaerobic zone is arranged in the aerobic zone, sewage enters the anaerobic zone through a water inlet pipe, a plurality of water outlets are arranged at the bottom of the anaerobic zone and are communicated with the aerobic zone, the aerobic granular sludge generation modules are uniformly and spacedly arranged around the inner wall of the aerobic zone, the sewage in the aerobic zone enters the aerobic granular sludge generation modules through the liquid inlets arranged at the upper part of the aerobic granular sludge generation modules, the aerobic granular sludge generation modules return the large-particle sludge to the anaerobic zone through the first sludge return pipes to accelerate the denitrification efficiency, and the aerobic granular sludge generation modules return the small-particle sludge to the aerobic zone through the second sludge return pipes to accelerate the sludge growth.

2. The continuous-flow aerobic granular sludge treatment device according to claim 1, characterized in that The inlet position of the first sludge return pipe is lower than that of the second sludge return pipe, and the first sludge return pipe corresponds to the distribution area of the large-particle sludge; the second sludge return pipe corresponds to the distribution area of the small-particle sludge.

3. The continuous-flow aerobic granular sludge treatment device according to claim 2, characterized in that The first sludge return pipe has a first liquid outlet, and the first liquid outlet is located at the upper part of the anaerobic zone and faces upward. The second sludge return pipe has a second liquid outlet, and the second liquid outlet is located at the upper part of the aerobic zone and faces upward.

4. The continuous-flow aerobic granular sludge treatment device according to claim 1, characterized in that The aerobic zone has an inner side area close to the anaerobic zone and an outer side area far away from the aerobic zone, the anaerobic zone has a central area and a side area surrounding the central area, the second sludge return pipe comprises a first communication section and a first liquid outlet section, the first communication section is arranged in communication with the aerobic granular sludge generation modules, and the first liquid outlet section is located in the inner side area; the first sludge return pipe comprises a second communication section and a second liquid outlet section, the second communication section is arranged in communication with the aerobic granular sludge generation modules and extends into the anaerobic zone, and the second liquid outlet section is located in the side area.

5. The continuous-flow aerobic granular sludge treatment device according to claim 1, characterized in that The outlet of the second sludge return pipe is arranged higher than the liquid inlet to make the sinking aerobic granular sludge released from the second sludge return pipe move in the opposite direction of the upward sewage, thereby promoting the formation and growth of the aerobic granular sludge.

6. The continuous-flow aerobic granular sludge treatment device according to claim 1, characterized in that The aerobic granular sludge generation modules are provided with a sludge selector, and the first sludge return pipe and the second sludge return pipe are both communicated with the sludge selector.

7. The continuous-flow aerobic granular sludge treatment device according to claim 1, characterized in that The device further comprises a clear liquid discharge assembly, which comprises a ring-shaped water tank, the water tank is arranged at the upper part of the aerobic zone, and the water tank is communicated with the water outlet pipe extending to the outside of the aerobic zone.

8. The continuous-flow aerobic granular sludge treatment device according to claim 7, characterized in that The top of the water tank is open to form a clear liquid inlet, and the top of the water tank is connected with a floating resistance structure capable of floating up and down with the liquid surface.

9. The continuous-flow aerobic granular sludge treatment device according to claim 1, characterized in that The water outlet end of the water inlet pipe is located above the anaerobic zone.

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