CN106865745B

CN106865745B - Biological contact oxidation pond

Info

Publication number: CN106865745B
Application number: CN201710271684.2A
Authority: CN
Inventors: 陶晋; 邓俊平; 宋丹
Original assignee: Hunan Bg Well Point Environmental Science & Technology Co ltd
Current assignee: Hunan Bg Well Point Environmental Science & Technology Co ltd
Priority date: 2017-04-24
Filing date: 2017-04-24
Publication date: 2022-11-11
Anticipated expiration: 2037-04-24
Also published as: CN106865745A

Abstract

The invention discloses a biological contact oxidation pond, wherein a partition plate is arranged in the oxidation pond and divides the oxidation pond into an upper reaction zone and a lower water inlet zone, a water distributor for communicating the reaction zone with the water inlet zone is arranged on the partition plate, the water inlet zone is connected with a water inlet pump and a water suction pump, the water inlet zone is communicated with the outside through an air pipe, suspended fillers are arranged in the reaction zone, and a water outlet zone communicated with the outside through a water outlet pipe is arranged at the top of the reaction zone. The invention forms a one-way channel from the water inlet area to the reaction area through the baffle plate and the one-way non-return device in the water distributor, when the aerator or other devices at the bottom of the tank need to be overhauled, the sewage in the inner diameter of the water inlet area only needs to be pumped out for fast overhauling, thereby greatly reducing the overhauling time, simultaneously, more importantly, the reaction area is not influenced completely, protecting the biological treatment environment in the reaction area, ensuring the continuity of sewage treatment, further improving the efficiency and reducing the cost.

Description

Biological contact oxidation pond

Technical Field

The invention belongs to the field of water treatment, and particularly relates to a biological contact oxidation pond.

Background

The biological contact oxidation method is an immersion type biomembrane method, various membrane-forming media are filled in a pool, and all filter materials are immersed in waste water. The aeration pipe is arranged at the lower part of the filter material, compressed air is used for bubbling and oxygenating, and organic matters in the wastewater are adsorbed on the biological membrane on the surface of the filter material and decomposed and oxidized by microorganisms. Like other biofilms, the biofilms of this method undergo alternative processes of biofilm formation, growth, thickening, sloughing, and the like. Part of the biological membrane falls off and becomes activated sludge, organic matters in the wastewater are adsorbed and decomposed in the circulating flow process, and the redundant falling biological membrane is discharged in a secondary sedimentation tank. Air enters the wastewater through an air distribution pipe at the bottom of the tank.

The existing biological contact oxidation has the characteristics of high purification efficiency, strong adaptability, convenient operation and management and the like, but still has the following problems:

1. the existing biological contact oxidation tank usually adopts a tank bottom micropore aeration form, a micropore aerator is easy to block and age to fall off in long-term operation, the aeration effect is influenced, meanwhile, other related devices at the tank bottom are easy to corrode and damage due to long-term soaking in wastewater, and irregular maintenance is needed, the conventional method is to discharge all the water being treated in the tank, and then the maintenance is started, and the method needs to pass: the whole process of drainage-maintenance-water injection-biological treatment environment formation greatly prolongs unnecessary maintenance time, more importantly, the stable biological treatment environment in the original oxidation pond is completely destroyed, and after the maintenance is finished, the proper biological treatment environment needs to be reset and cultured, thereby causing great waste of efficiency and cost.

2. The current biological contact oxidation pond's filler adopts vertical fixed combination filler that sets up more, is unfavorable for overhauing, simultaneously, after long-term operation, the filler support collapses because of waste water corrodes and the filler surface adheres to a large amount of activated sludge to influence sewage treatment effect.

3. Although the specific surface area of the existing filler is large, the biofilm mostly only covers the surface of the fiber bundle, so the effective treatment part of the filler is only the external surface area. When sewage flows upwards through the packing layer in a vertical mode in the tank, the vertically arranged packing is subjected to biological contact oxidation treatment in a point contact mode on a sewage section, so that the treatment effect is limited.

4. The existing combined filler is usually statically arranged in the tank, and the biofilm on the combined filler is not easy to fall off after growing, so that the filler sinks or gathers, the cyclic utilization of the filler is not facilitated, and the wastewater treatment effect is reduced.

5. The aeration air source of the existing aeration mode is concentrated, uniform aeration can not be realized, and meanwhile, the mode of aeration dissolved oxygen is single, so that the dissolved oxygen in the tank is little, the growth environment of microorganisms is restricted, and the wastewater treatment effect is further restricted.

Disclosure of Invention

The invention aims to provide a high-efficiency biological contact oxidation pond to solve the problems.

In order to realize the purpose, the invention adopts the following technical scheme:

the utility model provides a biological contact oxidation pond, be provided with a baffle in the oxidation pond, the baffle will the oxidation pond is separated for the reaction zone of top and the district of intaking of below, it passes through to intake the district the baffle with the one-way intercommunication in reaction zone, it is connected with intake pump and suction pump to intake the district, should intake the district through an tuber pipe and outside intercommunication, and should intake the district and still be provided with the maintenance passageway, be provided with the suspension filler in the reaction zone, the top in reaction zone is equipped with out the pool. When the aerator or other devices at the bottom of the pool need to be overhauled, the waste water in the water inlet area only needs to be pumped out for quick overhaul, the overhaul time is greatly shortened, and simultaneously, more importantly, the reaction area is not influenced completely, the biological treatment environment in the reaction area is protected, the continuity of waste water treatment is ensured, thereby improving the efficiency and reducing the cost.

Furthermore, a plurality of water distributors are uniformly inserted in the partition plate, unidirectional non-return devices for controlling unidirectional communication from the water inlet area to the reaction area are arranged in the water distributors, and unidirectional communication from the water inlet area to the reaction area is formed through the unidirectional non-return devices, so that the reaction area is isolated from the water inlet area during maintenance.

Furthermore, the water distributor comprises a water outlet and a water inlet, the water outlet is positioned on the side surface of one end of the water distributor, a plurality of water distribution holes are uniformly formed in the water inlet of the water distributor, the water outlet is positioned in the reaction zone, and the water inlet and the water distribution holes are positioned in the water inlet zone. The uniform arrangement of a plurality of water distributors and water distribution holes increases the primary oxygen dissolving process.

Furthermore, the water outlets are uniformly arranged along the circumferential direction of the side wall of the water distributor, the opening direction of the water outlets is inclined downwards by 60 degrees relative to the horizontal plane, so that water injected into the reaction zone from the water inlet zone is sprayed in an umbrella shape and collides with the partition plate, the stirring contact between local water and oxygen is increased, and the dissolving amount of the oxygen is further increased.

Furthermore, the oxidation pond still includes a agitator, the impeller of agitator is located in the reaction zone makes the waste water fluidization in the reaction tank, has accelerated the replacement processes such as hanging the membrane, growing, bodiness, droing of filler surface biomembrane, has guaranteed the suspension characteristic of filler, has guaranteed the recycling of suspension filler.

Furthermore, the air pipe extends from the top of the oxidation pond to the bottom of the water inlet area, a plurality of aerators are uniformly distributed at the bottom of the water inlet area, a plurality of aeration holes are uniformly formed in the upper surfaces of the aerators, and any aerator is communicated with the air pipe so that oxygen is fully dissolved in water through aeration of the aerator and the numerous micropores.

Furthermore, spongy open hole suspension filler is filled in the reaction zone, the specific surface area of the filler is large, the filler can suspend in a pool, and the treatment effect is better.

Further, the filling ratio of the spongy open pore suspended filler to the reaction zone is 65-75%.

Further, the ventilator is arranged above the maintenance channel, so that maintenance is more convenient, and the ventilator ensures air input when personnel maintain, thereby ensuring personal safety.

Further, the height ratio of the water inlet area to the reaction area is 3/8-3/7, and the height of the reaction area is more than 5 m.

Compared with the prior art, the invention has the advantages that:

1. through the one-way non return device in baffle and the water-locator, form the one-way passageway of district to the reaction zone of intaking, when aerator or other devices of bottom of the pool need overhaul, only need take the waste water of district's internal diameter of intaking out and can overhaul fast, very big reduction the time of overhauing, simultaneously, more importantly, the reaction zone is not influenced completely, the biological treatment environment in the reaction zone has been protected, waste water treatment's continuity has been guaranteed, thereby efficiency is improved, and the cost is reduced.

2. The filler adopts spongy open pore suspension filler, has larger specific surface area and better wastewater treatment effect, and simultaneously avoids the problem of filler support collapse.

3. Through adopting agitating unit stirring, make the waste water fluidization in the reaction tank, accelerated the replacement processes such as biofilm formation, growth, bodiness, the drop of filler surface biomembrane, guaranteed the suspension characteristic of filler, guaranteed the used cycle of suspension filler.

4. The micropore uniform aeration through the aerator, the water distribution hole (waste water further increases dissolved oxygen amount through the pore) of combining the water distributor to and the delivery port of 60 horizontal downward slopping (forming umbrella form play water, be equivalent to local stirring dissolved oxygen), the dissolved oxygen amount of waste water in the pond has been increased to multiple mode, very big improvement waste water treatment's biological environment, improved waste water treatment's effect.

The present invention will be described in further detail below with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:

FIG. 1 is a schematic structural view of a biological contact oxidation pond disclosed in a preferred embodiment of the present invention;

FIG. 2 is a schematic front view of a water distributor of a biological contact oxidation pond according to the preferred embodiment of the present invention;

FIG. 3 is a schematic view of the water inlet of the water distributor of the biological contact oxidation pond disclosed in the preferred embodiment of the invention;

fig. 4 is a schematic top view of an aerator of a biological contact oxidation tank disclosed in a preferred embodiment of the present invention.

Illustration of the drawings:

1. a reaction zone; 2. a water inlet area; 3. a water outlet area; 4. a water outlet pipe; 5. a stirrer; 51. a stirring impeller; 6. suspending the filler; 7. a partition plate; 8. A water distributor; 81. a water outlet; 82. a water inlet; 83. water distribution holes; 84. a one-way check device; 9. an aerator; 91. an aeration hole; 10. overhauling the channel; 11. a ventilator; 12. an access door; 13. a water inlet pump; 14. a water pump; 15. and (7) an air pipe.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

As shown in fig. 1-4, the embodiment of the present invention discloses a biological contact oxidation pond, wherein a partition 7 is disposed in the oxidation pond, and the partition 7 divides the oxidation pond into an upper reaction zone 1 and a lower water inlet zone 2, in this embodiment, the height ratio of the water inlet zone 2 to the reaction zone 1 is 3/8-3/7, and the height of the reaction zone 1 is more than 5 meters, so as to ensure the effect of wastewater treatment. The baffle plate 7 is provided with a water distributor 8 communicated with the reaction zone 1 and the water inlet zone 2, the water distributor 8 is internally provided with a one-way check device 84 which can be controlled by a conventional one-way valve, so that the one-way flow of the wastewater from the reaction zone 1 to the water inlet zone 2 is controlled.

Intake district 2 and be connected with water intake pump 13 and suction pump 14, should intake district 2 and outside intercommunication through an tuber pipe 15, tuber pipe 15 is connected with outside air compressor, extends to the bottom of intake district 2 from the top of oxidation pond, and the bottom equipartition of intake district 2 has a plurality of aerators 9, and a plurality of aeration holes 91 are evenly set up to the upper surface of aerator 9 to form numerous micropore aeration, increase the dissolved amount of oxygen, improvement waste water treatment's biological environment. Any aerator 9 is communicated with the air pipe 15, and external oxygen is continuously pumped into the water inlet area 2 in the treatment tank through the arrangement, so that an aerobic environment is provided for organisms in the reaction tank. Meanwhile, the suspended filler 6 is arranged in the reaction zone 1, in the embodiment, the suspended filler 6 is sponge open pore suspended filler, the filling ratio of the sponge open pore suspended filler to the reaction zone 1 is 65-75%, the filler provides a large amount of attached and proliferated media for microorganisms, the number of a large amount of microorganisms can be accumulated, various pollutants can be removed, and the normal and stable operation of the biological contact oxidation pond with high efficiency and high hydraulic load is ensured.

In this embodiment, a water outlet zone 3 is disposed at the top of the reaction zone 1, and the water outlet zone 3 is communicated with the outside through a water outlet pipe 4, so that the treated wastewater is discharged out of the oxidation pond.

In order to accelerate the replacement processes of biofilm formation, growth, thickening, falling and the like on the surface of the suspended filler 6 and ensure the suspension characteristic of the suspended filler 6, the suspended filler 6 can be continuously recycled, a stirrer 5 is also arranged above the oxidation pond, and a stirring impeller 51 of the stirrer 5 is positioned in the reaction zone 1 to fluidize wastewater to be treated in the pond, so that the phenomena of local accumulation and uneven sludge concentration in the reaction zone 1 of the suspended filler 6 are avoided, and the high-efficiency normal and stable operation of the biological contact oxidation pond is ensured.

In this embodiment, a plurality of water distributors 8 are uniformly inserted into the partition 7, each water distributor 8 includes a water outlet 81 and a water inlet 82, the water outlet 81 is located in the reaction zone 1, the water inlets 82 and the water distribution holes 83 thereof are located in the water inlet zone 2, the water outlets 81 are uniformly arranged along the circumferential direction of the side wall of the upper portion of the water distributor 8, and the opening direction of the water outlets 81 is inclined downward at an angle of 60 ° relative to the horizontal plane, as shown in fig. 2, so as to form umbrella-shaped water outlet, which is equivalent to local stirring of dissolved oxygen, thereby further increasing the dissolved oxygen amount. The surface of the water inlet 82 of the water distributor 8 is uniformly provided with a plurality of water distribution holes 83, which not only can play a role in isolating larger impurities, but also can further refine water and gas when passing through the pores, and can also increase the dissolved oxygen.

The bottom in district 2 of intaking is provided with access way 10, is provided with access door 12 outside access way 10, and access way 10 top is provided with ventilation blower 11, guarantees that maintenance personal maintains sufficient clean air occasionally. When the oxidation pond is filled with water, the access door 12 is in a closed state, and the water can enter the reaction zone 1. When the maintenance is needed, the water inlet pump 13 stops working. And (3) starting the water suction pump 14, after the water in the water inlet area 2 is drained, opening the access door 12, and allowing an access person to enter the water inlet area 2 through the access passage 10 for maintenance. The problem that in the past, water is often required to be pumped out for maintenance is avoided, and maintenance personnel can go down to the bottom of the oxidation pond through stairs for maintenance. In this way, the reaction zone 1 is not affected at all, the biological treatment environment in the reaction zone 1 is protected, and the continuity of wastewater treatment is ensured. After the maintenance is finished, water is injected again, the mode of saving electric power and labor cost is operated, and the stability of the biochemical system is ensured.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A biological contact oxidation pond is characterized in that a partition plate is arranged in the oxidation pond and divides the oxidation pond into an upper reaction area and a lower water inlet area, the water inlet area is communicated with the reaction area in a one-way mode through the partition plate and is connected with a water inlet pump and a water suction pump, the water inlet area is communicated with the outside through an air pipe and is also provided with an overhaul channel, a suspended filler is arranged in the reaction area, and a water outlet area is arranged at the top of the reaction area; a plurality of water distributors are uniformly inserted on the partition plate, and unidirectional non-return devices for controlling unidirectional communication from the water inlet area to the reaction area are arranged in the water distributors; the water outlets are uniformly arranged along the circumferential direction of the side wall of the water distributor, and the opening direction of the water outlets is obliquely downwards arranged relative to the horizontal plane; the oxidation pond also comprises a stirrer, and a stirring impeller of the stirrer is positioned in the reaction zone; the reaction zone is filled with spongy open hole suspension filler.

2. The biological contact oxidation pond according to claim 1, wherein the water distributor comprises a water outlet and a water inlet, the water outlet is located on a side surface of one end of the water distributor, the water inlet of the water distributor is uniformly provided with a plurality of water distribution holes, the water outlet is located in the reaction zone, and the water inlet and the water distribution holes are located in the water inlet zone.

3. The biological contact oxidation pond according to claim 2, wherein the opening direction of the water outlet is inclined downward at 60 ° with respect to the horizontal plane.

4. The biological contact oxidation tank as set forth in any one of claims 1 to 3, wherein the air pipe extends from the top of the oxidation tank to the bottom of the water inlet zone, a plurality of aerators are uniformly distributed on the bottom of the water inlet zone, a plurality of aeration holes are uniformly formed on the upper surface of each aerator, and any aerator is communicated with the air pipe.

5. The biological contact oxidation tank as claimed in claim 1, wherein the filling ratio of the spongy open pore suspension packing to the reaction zone is 65-75%.

6. The biological contact oxidation tank of any one of claims 1 to 3, wherein a ventilator is provided above the service passage.

7. The biological contact oxidation pond according to claim 6, wherein the ratio of the height of the water inlet zone to the height of the reaction zone is 3/8 to 3/7, and the height of the reaction zone is more than 5 m.