Integrated sewage treatment device based on biological membrane

Abstract

The utility model discloses an integrated sewage treatment device based on a biological membrane, which belongs to the technical field of sewage treatment devices and comprises an adjusting tank, an anoxic tank, a biological membrane reaction zone, an aerobic zone and a secondary sedimentation tank which are sequentially arranged, a stirring paddle is arranged at the bottom of the inner side of the adjusting tank, and a plurality of biological membrane frames are arranged in the biological membrane reaction zone; the aerobic zone is composed of a first aerobic tank and a second aerobic tank which are adjacent, a first aeration head is arranged at the bottom of the inner side of the first aerobic tank, a second aeration head is arranged at the bottom of the inner side of the second aerobic tank, the top of the second aerobic tank is sleeved with a gas recovery top cover, and a recovery pipeline which extends into the first aerobic tank and is communicated with the first aeration head is arranged at the top of the gas recovery top cover; one end of the second aeration head is connected with an aeration machine through a gas pipeline; the first aerobic tank is connected with the anoxic tank, and the second aerobic tank is connected with the secondary sedimentation tank; according to the utility model, the sewage treatment effect can be improved, and the aeration process is energy-saving and environment-friendly.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment device technical field, concretely relates to an integrated sewage treatment device based on biological membrane. BACKGROUND

[0002] In the field of sewage treatment, sewage is usually treated by adopting the ways of anoxic treatment, anaerobic treatment, aerobic treatment, biological membrane treatment, sedimentation treatment, etc., and the current common A-MBBR-O sewage treatment process can be obtained by combining the above-mentioned various sewage treatment ways, which can efficiently treat the organic matter and nitrogen and phosphorus pollutants in sewage, has strong adaptability to water quality fluctuation and high treatment efficiency and stability, and for sewage with particularly high pollutant concentration or particularly large water quality fluctuation, the intensity of aerobic treatment usually needs to be increased and a structure of two aerobic tanks in series is adopted; the aerobic tank needs to improve the oxygen solubility in the water body through aeration, but only a small amount of oxygen in the bubbles generated in the aeration process is dissolved in the water body, and most of the oxygen is dissipated into the air after the bubbles float to the surface of the water body, and increasing the intensity of aerobic treatment means that more aeration bubbles are wasted, and the sewage treatment usually adopts an aerator to generate aeration bubbles, and the waste of aeration bubbles means that part of the electric energy consumed in the operation process of the aerator is wasted, and if the utilization rate of aeration bubbles can be improved, the utilization rate of electric energy can be improved.

[0003] Based on the above situation, the Chinese patent with publication number CN205133335U discloses an integrated sewage treatment equipment, which comprises a shell, a pre-aeration adjusting tank, a hydrolysis acidification tank, an aerobic biological filter tank, a clean water tank and an equipment room are sequentially arranged in the shell in the horizontal direction from one end to the other end, the clean water tank is provided with a sludge tank above, the aerobic biological filter tank is provided with filter material, the aerobic biological filter tank is also provided with a sludge pump for pumping the sludge in the aerobic biological filter tank into the sludge tank, the hydrolysis acidification tank is filled with three-dimensional elastic filler, the equipment room is provided with a blower, the blower is provided with a first air pipe for aeration into the pre-aeration adjusting tank, one end of the first air pipe in the pre-aeration adjusting tank is provided with an aeration pipe, the aeration pipe is provided with a plurality of air holes, and the blower is provided with a second air pipe for aeration into the aerobic biological filter tank.

[0004] The sewage treatment equipment disclosed in the above patent realizes aeration into the pre-aeration adjusting tank and the aerobic biological filter tank through the blower, and the efficiency of sewage treatment is improved by twice aeration of the sewage, but after the blower aeration produces bubbles in the sewage body, only a small amount of oxygen in the bubbles is dissolved in the sewage, and most of the oxygen is dissipated into the air after the bubbles float to the surface of the sewage, the utilization rate of the bubbles for aeration is low, and the utilization rate of the electric energy consumed in the operation process of the blower is also low, so the sewage treatment equipment still has room for improvement. UTILITY MODEL CONTENTS

[0005] The utility model proposes an integrated sewage treatment device based on biological membrane for the technical defects in the background art, solves above -mentioned technical problem and satisfies actual demand, specific technical scheme is as follows:

[0006] An integrated sewage treatment device based on biological membrane, comprising the adjusting pool, the anoxic pool, the biological membrane reaction area, the aerobic area, the secondary sedimentation tank which are sequentially arranged, the inside bottom of adjusting pool is equipped with the stirring paddle, the biological membrane reaction area is equipped with a plurality of biological membrane frame,

[0007] The aerobic area is composed of adjacent first aerobic pool and second aerobic pool, the inside bottom of first aerobic pool is equipped with first aeration head, the inside bottom of second aerobic pool is equipped with second aeration head and is equipped with gas recovery top cover on top, the top of gas recovery top cover is equipped with recovery pipeline extending to the inside of first aerobic pool and being communicated with first aeration head, one end of second aeration head is connected with aerator through gas pipeline,

[0008] The first aerobic pool is connected with the anoxic pool, and the second aerobic pool is connected with the secondary sedimentation tank.

[0009] As a further technical scheme of the utility model, the biological membrane reaction area is equipped with a separation net layer, and the separation net layer separates the biological membrane reaction area into at least two biological membrane reaction pools.

[0010] As a further technical scheme of the utility model, the separation net layer is composed of a plurality of separation nets, and a biological membrane interlayer is formed between two adjacent separation nets, and the biological membrane frame is arranged in the biological membrane interlayer.

[0011] As a further technical scheme of the utility model, a spiral flow guide plate is fixedly connected to the edge of the adjusting pool above the stirring paddle, and the spiral flow guide plate extends downward from the top of the inside of the adjusting pool.

[0012] As a further technical scheme of the utility model, a plurality of turbulence baffles are staggered on opposite sides of the anoxic pool.

[0013] As a further technical scheme of the utility model, the first aerobic pool, the second aerobic pool, and the secondary sedimentation tank are all provided with a sludge backflow pipe extending to the adjusting pool.

[0014] As a further technical scheme of the utility model, the anoxic pool, the biological membrane reaction area, the first aerobic pool, and the second aerobic pool are sequentially arranged around the adjusting pool, and the secondary sedimentation tank is arranged below the adjusting pool.

[0015] The utility model has the beneficial effects that:

[0016] The utility model is suitable for treating the sewage which has higher content of organic matter and nitrogen and phosphorus pollutants, and the sewage successively passes through the oxygen deficiency treatment, biological membrane treatment, oxygen treatment, secondary precipitation treatment, the oxygen treatment can carry out the depth treatment to the sewage through setting up two oxygen pools, strengthens the stability of whole sewage treatment device and the effect of sewage treatment, and through gas recovery top cover, the airflow produced in the second oxygen pool is collected and recycled and is transported to the first oxygen pool through the recovery pipeline and carries out secondary aeration, improves the utilization rate of the airflow produced by aerator, is favorable for making the aeration process realize energy saving and environmental protection. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a kind of the top view of integrated sewage treatment device based on biological membrane.

[0018] Figure 2 It is Figure 1 The sectional view at A-A in

[0019] Figure 3 It is the structure schematic view of cyclone guide plate of integrated sewage treatment device based on biological membrane.

[0020] Wherein: 1-adjustment pool, 11-stirring paddle, 12-cyclone guide plate, 2-oxygen deficiency pool, 21-turbulent baffle, 3-biological membrane reaction area, 31-biological membrane frame, 32-separation net, 4-oxygen area, 41-first oxygen pool, 42-second oxygen pool, 43-first aeration head, 44-second aeration head, 45-gas recovery top cover, 46-recovery pipeline, 47-aerator, 5-secondary sedimentation tank, 6-sludge return pipe. DETAILED DESCRIPTION

[0021] The embodiment of the utility model is explained below in combination with the drawings and relevant examples, and the embodiment of the utility model is not limited to the following examples, and the utility model relates to the necessary components in the related technical field, should be regarded as the known technology in the technical field, is the technology that the person skilled in the art can know and master.

[0022] Such as Figure 1 , 2As shown, an integrated sewage treatment device based on biofilm includes a regulating pool 1, an anoxic pool 2, a biofilm reaction zone 3, an aerobic zone 4, and a secondary sedimentation tank 5 arranged in sequence, the regulating pool 1 is provided with a stirring paddle 11 at the inner bottom, and the biofilm reaction zone 3 is provided with a plurality of biofilm frames 31; the aerobic zone 4 is composed of adjacent first and second aerobic pools 41 and 42, the first aerobic pool 41 is provided with a first aeration head 43 at the inner bottom, the second aerobic pool 42 is provided with a second aeration head 44 at the inner bottom and a gas recovery top cover 45 at the top, the gas recovery top cover 45 is provided with a recovery pipeline 46 extending into the first aerobic pool 41 and communicating with the first aeration head 43, and the second aeration head 44 is connected with an aerator 47 through a gas pipeline at one end; the first aerobic pool 41 is connected with the anoxic pool 2, and the second aerobic pool 42 is connected with the secondary sedimentation tank 5.

[0023] The utility model is suitable for treating sewage with high content of organic matter, nitrogen and phosphorus pollutants, wherein, the regulating pool 1 is provided with a pipeline for guiding the flow of the treated sewage after physical filtration, the sewage enters the regulating pool 1 through the pipeline and is mixed with active sludge and other materials, the stirring paddle 11 rotates under the drive of the driving motor, thereby stirring the sewage in the regulating pool 1 to promote the full mixing of the sewage and the active sludge, and the regulating pool 1 is provided with a submersible pump and a water pipe on the side close to the anoxic pool 2 to pump the sewage into the anoxic pool 2; the anoxic pool 2 forms an anoxic environment, the sewage performs micro-hydrolysis reaction and denitrification reaction in the environment, the micro-hydrolysis reaction converts macromolecular organic matter into small molecular organic matter, significantly increases the dissolved organic matter in the sewage, thereby improving the biodegradability of the sewage, the denitrification reaction reduces nitrate nitrogen in the sewage by reducing nitrate or nitrite to nitrogen, effectively reduces the risk of water eutrophication, and the sewage is pumped into the biofilm reaction zone 3 through the submersible pump and the water pipe provided on the side of the anoxic pool 2 close to the biofilm reaction zone 3 after the anoxic treatment in the anoxic pool 2.

[0024] After the above structure, it needs to be further explained that the biofilm framework 31 intercepts in the cross section of the biofilm reaction zone 3, and the sewage must pass through the biofilm framework 31 to leave the biofilm reaction zone 3 and enter the aerobic zone 4. The biofilm framework 31 serves as a carrier for the attachment of microorganisms in the sewage. During the flow of the sewage through the surface of the biofilm framework 31, the organic pollutants in the sewage are taken by the microorganisms on the biofilm as nutrients, and the sewage is purified, while the microorganisms themselves also proliferate. The biofilm reaction zone 3 is close to the aerobic zone 4 side by setting a submersible pump and a water pipe to pump the sewage into the aerobic zone 4. The sewage in the aerobic zone 4 passes through the first aerobic tank 41 and the second aerobic tank 42 in turn for two times of aerobic treatment. The sewage in the first aerobic tank 41 is pumped into the second aerobic tank 42 by a submersible pump and a water pipe. In addition, the first aeration head 43 and the second aeration head 44 are both selected to use a bubble refiner, and each of the first aeration head 43 and the second aeration head 44 is provided with a plurality of aeration heads. The aerator 47 produces a large number of small bubbles in the first aerobic tank 41 and the second aerobic tank 42 through the first aeration head 43 and the second aeration head 44 respectively for aeration. The microorganisms further degrade the organic matter and perform nitrification reaction to convert ammonia nitrogen into nitrate and remove phosphorus by excessive uptake of phosphorus bacteria, which is beneficial to improve the removal efficiency of organic matter and nitrogen and phosphorus pollutants in the sewage. The sewage in the second aerobic tank 42 is pumped into the secondary sedimentation tank 5 by a submersible pump and a water pipe. Under the action of gravity, the suspended solids in the sewage settle to the bottom to form sludge and concentrate the sludge, and the supernatant is discharged as purified water.

[0025] After the above structure, it needs to be further explained that the gas recovery top cover 45 completely covers the top of the second aerobic tank 42. The second aeration head 44 is directly connected with the aerator 47 through a gas pipeline. The airflow generated by the operation of the aerator 47 will directly pass through the second aeration head 44 to generate a large number of small bubbles in the sewage of the second aerobic tank 42. The small bubbles gradually dissolve part of the oxygen in the sewage during the floating process. When the small bubbles float to the surface of the sewage, they will gather in the gas recovery top cover 45 at the top of the second aerobic tank 42 to form a small airflow. The small airflow is guided and transported to the first aeration head 43 through the recovery pipeline 46 to generate a large number of small bubbles in the sewage of the first aerobic tank 41. The airflow generated by the aeration in the second aerobic tank 42 is collected, recovered and transported to the first aerobic tank 41 for secondary aeration, which improves the utilization rate of the airflow generated by the aerator 47 and is beneficial to energy saving and environmental protection in the aeration process.

[0026] It should be noted that the second aerobic tank 42 has a higher aeration amount. The second aerobic tank 42 can perform deep treatment on the sewage by adding biological fillers or the like, so as to form a certain redundancy and complementary relationship between the second aerobic tank 42 and the first aerobic tank 41, and enhance the stability of the entire sewage treatment device and the effect of sewage treatment.

[0027] AsFigure 1 As shown in the drawings, as one of the preferred embodiments of the present application, the biological membrane reaction zone 3 is provided with a separation net layer, the separation net layer separates the biological membrane reaction zone 3 into at least two biological membrane reaction pools, the separation net layer is composed of a plurality of separation nets 32, the biological membrane sandwich is formed between the adjacent two separation nets 32, and the biological membrane frame 31 is arranged in the biological membrane sandwich; the biological membrane reaction zone 3 is provided with at least two separation net layers and is separated into at least three biological membrane reaction pools, each separation net layer is composed of at least three separation nets 32 and forms at least two biological membrane sandwiches, and the effective contact area of the sewage and the biological membrane can be improved through the plurality of biological membrane reaction pools, so that the sewage is more thoroughly purified, the content of the organic pollutants in the sewage treated by the biological membrane reaction zone 3 is lower, and the sewage purification efficiency is improved.

[0028] Further, the biological membrane frame 31 is fixed with the separation net layer by being inserted into the biological membrane sandwich, the surface of the separation net 32 is provided with a plurality of mesh holes to ensure that the sewage passes through and contacts the biological membrane on the surface of the biological membrane frame 31, and when the biological membrane frame 31 needs to be replaced or cleaned, the biological membrane frame 31 in the same separation net layer can be replaced or cleaned one by one, so that the biological membrane frame 31 is always retained in the separation net layer, and the effect of the biological membrane reaction zone 3 on the sewage purification is avoided.

[0029] Further, a plurality of bubble refiners can be arranged at the inside bottom of the biological membrane reaction zone 3, the bubble refiner can be connected with the recovery pipeline 46 in communication, the biological membrane reaction zone 3 is aerated by the airflow recovered in the second aerobic tank 42, or the same gas recovery top cover 45 and the recovery pipeline 46 connected with the bubble refiner are arranged at the top of the first aerobic tank 41, the airflow recovered in the first aerobic tank 41 is guided to the biological membrane reaction zone 3 for aeration, so that the airflow generated by the aerator 47 realizes three times of aeration, sufficient oxygen is provided for the microorganisms in the biological membrane reaction zone 3 to support the aerobic respiration and organic matter degradation of the microorganisms, and the utilization rate of the airflow generated by the aerator 47 can be improved.

[0030] As shown in the drawings, Figure 1 , 3 As one of the preferred embodiments of the present application, the stirring paddle 11 is provided with a rotational flow guide plate 12 fixedly connected with the edge of the adjusting tank 1, and the rotational flow guide plate 12 extends downward in a spiral manner from the inside top of the adjusting tank 1; the extending direction of the rotational flow guide plate 12 is the same as the rotating direction of the stirring paddle 11, when the stirring paddle 11 rotates to stir the sewage in the adjusting tank 1, the sewage collides with the rotational flow guide plate 12 in the flowing process, part of the water flow flows along the extending direction of the rotational flow guide plate 12 under the disturbance of the rotational flow guide plate 12, so that a rotational flow is formed, which is beneficial to make the stirring force of the water flow act on the bottom of the adjusting tank 1, and avoids that the activated sludge is deposited on the bottom of the adjusting tank 1.

[0031] As Figure 1 shown, as one of the preferred embodiments of the present application, the relative two sides of the anoxic tank 2 are staggered with a plurality of spoiler baffles 21, the spoiler baffles 21 make the path of the sewage flowing in the anoxic tank 2 S-shaped, which can improve the residence time of the sewage in the anoxic tank 2, so that the microorganisms in the anoxic tank 2 can more thoroughly carry out the micro-hydrolysis reaction and denitrification reaction, which is beneficial to reduce the content of pollutants in the sewage.

[0032] As Figure 1 , 2 shown, as one of the preferred embodiments of the present application, the first aerobic tank 41, the second aerobic tank 42 and the secondary sedimentation tank 5 are provided with a sludge return pipe 6 extending to the adjusting tank 1, the sludge return pipe 6 is provided with a centrifugal pump near the side close to the adjusting tank 1, the centrifugal pump generates centrifugal force to suck and pump the activated sludge in the first aerobic tank 41, the second aerobic tank 42 and the secondary sedimentation tank 5 to the adjusting tank 1 to mix with the sewage, and the sludge return is beneficial to ensure the microbial balance during the entire treatment process of the sewage, ensure the growth and metabolic activity of the microorganisms in the sewage, and improve the purification efficiency of the sewage.

[0033] As Figure 1 , 2 shown, as one of the preferred embodiments of the present application, the anoxic tank 2, the biofilm reaction zone 3, the first aerobic tank 41 and the second aerobic tank 42 are sequentially arranged around the adjusting tank 1, and the secondary sedimentation tank 5 is arranged below the adjusting tank 1; the present application arranges the anoxic tank 2, the biofilm reaction zone 3, the first aerobic tank 41 and the second aerobic tank 42 around the adjusting tank 1, so that the structure between the various sewage treatment tanks is more compact, the first aerobic tank 41, the second aerobic tank 42 and the secondary sedimentation tank 5 are adjacent to the adjusting tank 1, the length of the sludge return pipe 6 is reduced, and the secondary sedimentation tank 5 is preferably buried underground, which is beneficial to reduce the occupied space of the present application.

[0034] The above is only the preferred embodiment of the present application, it should be pointed out that for the ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A biofilm-based integrated sewage treatment device, comprising a conditioning tank (1), an anoxic tank (2), a biofilm reaction zone (3), an aerobic zone (4), and a secondary sedimentation tank (5) arranged in sequence, characterized in that, The inside bottom of the adjusting pool (1) is provided with a stirring paddle (11), and the biological membrane reaction zone (3) is provided with a plurality of biological membrane frames (31); The aerobic zone (4) is composed of adjacent first and second aerobic pools (41) and (42), the inside bottom of the first aerobic pool (41) is provided with a first aeration head (43), the inside bottom of the second aerobic pool (42) is provided with a second aeration head (44) and the top of the second aerobic pool (42) is provided with a gas recovery top cover (45), the top of the gas recovery top cover (45) is provided with a recovery pipeline (46) extending into the first aerobic pool (41) and communicating with the first aeration head (43), and one end of the second aeration head (44) is connected with an aerator (47) through a gas pipeline. The first aerobic pool (41) is connected with the anoxic pool (2), and the second aerobic pool (42) is connected with the secondary sedimentation pool (5).

2. The integrated biofilm-based wastewater treatment device of claim 1, wherein, The biological membrane reaction zone (3) is provided with a separation net layer, and the separation net layer separates the biological membrane reaction zone (3) into at least two biological membrane reaction pools.

3. The integrated biofilm-based wastewater treatment device of claim 2, wherein, The separation net layer is composed of a plurality of separation nets (32), and a biological membrane interlayer is formed between adjacent two separation nets (32), and the biological membrane frame (31) is arranged in the biological membrane interlayer.

4. The integrated biofilm-based wastewater treatment device of claim 1, wherein, The stirring paddle (11) is provided with a cyclone guide plate (12) fixedly connected with the edge of the adjusting pool (1) above the stirring paddle (11), and the cyclone guide plate (12) extends downward spirally from the inside top of the adjusting pool (1).

5. The integrated biofilm-based wastewater treatment device of claim 1, wherein, A plurality of turbulence baffles (21) are arranged on the opposite sides of the anoxic pool (2) in a staggered manner.

6. The integrated biofilm-based wastewater treatment device of claim 1, wherein, The first aerobic pool (41), the second aerobic pool (42) and the secondary sedimentation pool (5) are all provided with a sludge return pipe (6) extending to the adjusting pool (1).

7. The integrated biofilm-based wastewater treatment device of claim 1, wherein, The anoxic pool (2), the biological membrane reaction zone (3), the first aerobic pool (41) and the second aerobic pool (42) are sequentially arranged around the adjusting pool (1), and the secondary sedimentation pool (5) is arranged below the adjusting pool (1).

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