CN212127682U - A Circulating Mobile Carrier Biofilm Reactor - Google Patents

Abstract

The utility model relates to a biofilm reactor for circulating mobile carriers, which comprises a primary settling tank, a liquid discharge port of the primary settling tank is sequentially connected with a peristaltic pump and a feed port at the bottom of the reaction tank through a pipeline, and the interior of the reaction tank is divided into a falling area, a The lifting area and the sedimentation area, the falling area and the lifting area are separated by a deflector, the lifting area and the sedimentation area are separated by an overflow plate, and the suspended magnetic filler is placed inside the falling area and the lifting area. The suspended magnetic filler of the utility model can increase the dissolved oxygen concentration of the system, induce the synthesis and enzymatic activity of biological enzymes, increase the adsorption and degradation ability of the carrier to magnetic microorganisms and organic pollutants, and is conducive to film hanging and accumulation of high-concentration microorganisms. By forcing the carrier to circulate, the aeration and aeration are uniform, and the filler in the whole reaction tank is in a uniform fluidized state. There is a triangular overflow plate in the middle of the reactor, which can not only prevent the loss of packing, but also avoid problems such as clogging of the grid plate. There is also a baffle plate in the reaction tank to effectively strengthen the sedimentation.

Description

A Circulating Mobile Carrier Biofilm Reactor

technical field

The utility model belongs to the field of wastewater treatment, and relates to a circulating mobile carrier biofilm reactor.

Background technique

In today's society, with the rapid development of the economy, one of the problems we have to face is environmental pollution, so people pay more and more attention to the development of environmental protection, and increase investment in environmental protection and sanitation. Microorganisms, the treatment effect is not very satisfactory. At low concentrations, magnetic microorganisms can selectively remove metals and have high treatment efficiency, so they can be applied to the removal of heavy metal ions in industrial wastewater; the pH and temperature conditions are wide, which is conducive to their own growth; low cost , Reusable, small investment, low operating cost, can effectively recover some precious metals, no secondary pollution. However, further research is needed on how to combine it with the sewage plant to further improve its efficiency.

SUMMARY OF THE INVENTION

In order to solve the above technical problems, the utility model provides a circulating mobile carrier biofilm reactor, which can be used for the treatment of industrial waste water and domestic sewage.

The technical scheme adopted by the utility model:

A circulating mobile carrier biofilm reactor, comprising a primary sedimentation tank, the liquid discharge port of the primary sedimentation tank is sequentially connected with a peristaltic pump and a feed port at the bottom of the reaction tank through a pipeline, and the interior of the reaction tank is divided into a falling area, a lifting area and a sedimentation area. The drop zone and the lift zone are separated by a deflector, the lift zone and the settling zone are separated by an overflow plate, and suspended magnetic fillers are placed inside the drop zone and the lift zone.

Preferably, the upper part of the sedimentation zone is provided with a water outlet pipe, and the bottom of the sedimentation zone is provided with a mud discharge pipe.

Further preferably, the bottom of the precipitation zone is also provided with a return pipeline that communicates with the feed port of the peristaltic pump.

Preferably, a microporous aeration device is provided at the bottom of the lifting zone, and an air flow meter and an air pump are provided on the air inlet pipe of the microporous aeration device.

Preferably, a baffle is also provided inside the sedimentation zone, and the baffle is not sealed with the bottom of the reaction tank.

Preferably, the bottom of the overflow plate is sealed with the bottom of the reaction tank.

Preferably, the upper part of the overflow plate is triangular serrated.

Preferably, the deflector is located in the fall-back area and is not sealed with the bottom of the reaction tank.

Preferably, the bottom angle of the reaction tank is an oblique angle.

Beneficial effects of the utility model:

1. Suspended magnetic fillers Each filler is equivalent to a miniature bioreactor with a magnetic field, which can increase the dissolved oxygen concentration in the system, induce bioenzyme synthesis and enzymatic activity, and increase the carrier's ability to adsorb and degrade magnetic microorganisms and organic pollutants , which is conducive to film hanging and accumulation of high-concentration microbial biomass.

2. By forcing the carrier to circulate, the aeration and aeration are uniform, and the filler in the whole reaction tank is in a uniform fluidized state. There is a triangular overflow plate in the middle of the reactor, which can not only prevent the loss of packing, but also avoid problems such as clogging of the grid plate. There is also a baffle plate in the reaction tank to effectively strengthen the sedimentation.

Description of drawings

1 is a schematic diagram of the device system of the present utility model;

Among them: primary sedimentation tank 1, peristaltic pump 2, reaction tank 3, drop zone 301, lift zone 302, sedimentation zone 303, deflector 4, microporous aeration device 5, air pump 6, air flow meter 7, overflow plate 8, baffle plate 9.

Detailed ways

Example 1

As shown in Figure 1, a biofilm reactor with a circulating mobile carrier includes a primary sedimentation tank 1, and the liquid discharge port of the primary sedimentation tank 1 is connected with the peristaltic pump 2 and the feed port at the bottom of the reaction tank 3 through pipelines in turn. The interior of the pool 3 is divided into a drop zone 301, a lift zone 302, and a settling zone 303. The drop zone 301 and the lift zone 302 are separated by a deflector 4, and the lift zone 302 and the settling zone 303 are separated by an overflow plate 8. Suspended magnetic fillers are placed inside the zone 301 and the lift zone 302 .

Preferably, the upper part of the sedimentation zone 303 is provided with a water outlet pipe, and the bottom of the sedimentation zone 303 is provided with a mud discharge pipe.

Further preferably, the bottom of the precipitation zone 303 is also provided with a return pipeline to communicate with the feed port of the peristaltic pump 2 .

Preferably, a microporous aeration device 5 is provided at the bottom of the lifting zone 302 , and an air flow meter 7 and an air pump 6 are provided on the air inlet pipe of the microporous aeration device 5 .

Preferably, a baffle 9 is further provided inside the precipitation zone 303 , and the baffle 9 is not sealed with the bottom of the reaction tank 3 .

Preferably, the bottom of the overflow plate 8 is sealed with the bottom of the reaction tank 3 .

Preferably, the upper part of the overflow plate 8 is triangular serrated.

Preferably, the deflector 4 is located in the fall-back area 301 and the bottom of the reaction tank 3 is not sealed.

Preferably, the bottom angle of the reaction tank 3 is an oblique angle.

Working principle: Hydrophilic magnetic powder Fe ₃ O ₄ and polyvinyl alcohol, activated carbon and other raw materials are prepared into a suspended magnetic biological filler with a weak magnetic field of 2.0-4.0 mT through a series of processes such as dissolving, foaming, and casting. The circulating mobile carrier biofilm reactor is made of plexiglass and is divided into three zones: a falling zone 301 , a lifting zone 302 and a precipitation zone 303 . The lifting area 302 and the falling area 301 are separated by a deflector 4 , and a microporous aeration device 5 is installed at the bottom of the lifting area 302 . In the lifting area 302, compressed air with a certain pressure and flow enters the tank through the microporous aeration device 5. Under the lifting of the air, the filler, sewage and gas form a three-phase flow in the tank, and move upward at a higher flow rate, the filler After rising from the lifting area to the top of the deflector, it falls back in the falling area 301. When the filler falls back to the bottom of the deflector 4, it enters the lifting area 302 due to inertial motion and is lifted, thereby forming a cyclic movement of the filler, thereby achieving the same The full contact and mixing of the wastewater strengthens the contact between the biofilm and the wastewater. The rapid lifting of the filler accelerates the mutual movement between the sewage and the biofilm. The movement of the carrier is relatively intense, and there is strong friction and collision between the carriers. At the same time, due to the asynchronous characteristics of gas, liquid and solid in the three-phase flow, the air and liquid have a strong shearing effect on the surface of the carrier, which makes the surface of the filler ageing. The biofilm is shed and renewed, the new film grows and reproduces rapidly, and the biological response ability is strong, which can maintain the biological reaction of the entire system in a high-efficiency state. During the lifting process of the filler, the mass transfer effect is strengthened due to the relatively violent three-phase flow, and the oxygen in the air dissolves into the water at a faster rate and is absorbed and utilized by the biofilm, which has a good oxygenation effect. After the three-phase flow reaches the top of the tank, most of the air escapes from the water surface and enters the atmosphere, and part of the air entrained by the filler and the treated water enters the drop zone 301 under the action of gravity and motion inertia. Due to the action of the rising air bubbles, the settling speed of the carriers in the falling area 301 is slowed down, and part of the carriers floats up. In the process of moving, the filler is in full contact with the sewage, and the biofilm on the surface of the filler continuously absorbs the organic matter and dissolved oxygen in the water, thereby purifying the sewage. Finally, the sewage overflows from the upper triangular serrated overflow plate 8 to the sedimentation area 303 on the right side. This design can not only recycle the sewage, avoid the biofilm blocking the liquid outlet, but also prevent the loss of fillers. The baffles 9 of the flow plate can effectively enhance the settleability of the precipitation, and the clarified water passes over the baffles 9 and overflows the water through the overflow hole on the upper part of the outer wall of the reaction tank 3 . In order to improve the hydraulic flow characteristics, prevent the bottom of the filler from depositing, and perform forced circulation, the bottom corner of the reaction tank 3 is made into an oblique angle.

The device adopts a continuous operation mode. First, the raw water enters the primary sedimentation tank 1, and there is no aeration device in the tank. After a period of anoxic stage, the effluent from the anoxic section flows through the peristaltic pump 2 from the bottom into the reaction tank 3. The inside of the reaction tank 3 is aerated while the water is fed to keep the DO in the aerobic tank at about 2-4 mg/L; the sewage in the reaction tank 3 overflows from the top of the overflow plate 8 to the sedimentation zone 303, and the clean water enters the next process, and the active sewage The mud is discharged from the mud discharge hole at the bottom of the sedimentation zone 303 for recycling or discharge. When the quality of the effluent does not meet the standard, the sewage can also be returned to the falling area 301 and the lifting area 302 through the sludge discharge hole. In the continuous operation of the reaction tank 3, the pH value is controlled at about 7.0-8.0, so that the activated sludge and sewage are continuously discharged.

Claims (9)

1. The utility model provides a circulation removal carrier biofilm reactor, includes primary sedimentation pond (1), its characterized in that: the drain outlet of the primary sedimentation tank (1) is communicated with the feed inlet at the bottom of the peristaltic pump (2) and the reaction tank (3) in sequence through a pipeline, the reaction tank (3) is internally divided into a falling area (301), a lifting area (302) and a sedimentation area (303), the falling area (301) and the lifting area (302) are separated by a guide plate (4), the lifting area (302) and the sedimentation area (303) are separated by an overflow plate (8), and the suspended magnetic filler is placed inside the falling area (301) and the lifting area (302).

2. The circulating mobile carrier biofilm reactor of claim 1, wherein: the upper part of the settling zone (303) is provided with a water outlet pipe, and the bottom of the settling zone (303) is provided with a sludge discharge pipe.

3. The circulating mobile carrier biofilm reactor of claim 2, wherein: the bottom of the settling zone (303) is also provided with a return pipeline which is communicated with a feed inlet of the peristaltic pump (2).

4. The circulating mobile carrier biofilm reactor of claim 1, wherein: the bottom of the lifting area (302) is provided with a micropore aeration device (5), and an air flow meter (7) and an air pump (6) are arranged on an air inlet pipeline of the micropore aeration device (5).

5. The circulating mobile carrier biofilm reactor of claim 1, wherein: a baffle plate (9) is also arranged in the settling zone (303), and the baffle plate (9) is not sealed with the bottom of the reaction tank (3).

6. The circulating mobile carrier biofilm reactor of claim 1, wherein: the bottom of the overflow plate (8) is sealed with the bottom of the reaction tank (3).

7. The circulating mobile carrier biofilm reactor of claim 6, wherein: the upper part of the overflow plate (8) is triangular sawtooth-shaped.

8. The circulating mobile carrier biofilm reactor of claim 1, wherein: the guide plate (4) is positioned in the falling area (301) and is not sealed with the bottom of the reaction tank (3).

9. The circulating mobile carrier biofilm reactor of claim 1, wherein: the bottom angle of the reaction tank (3) is an oblique angle.

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