A continuous flow water treatment reaction device based on aerobic granular sludge

Abstract

The invention discloses a continuous flow water treatment reaction device based on aerobic granular sludge. The device comprises a main water inlet pipeline, which is respectively connected to a left tank and a right tank of an anaerobic tank through two branch water inlet pipelines. A plurality of microorganism carriers are installed in the left tank and the right tank. The left tank and the right tank of the anaerobic tank are connected to an aerobic tank through two branch water inlet pipelines. The aerobic tank is respectively connected to the left tank and the right tank through two return pipes. The water outlet of the aerobic tank is connected to the water inlet of an aeration tank. The water outlet of the aerobic tank is provided with a carbon source injection port. The water channel in the aeration tank is circuitously distributed and divided into an aeration section, a stirring section and a slow-speed section. The water outlet end of the aeration tank is connected to a sedimentation tank. One outlet of the sedimentation tank is connected to a sludge pipe, and the other outlet is connected to a main discharge pipe. The other outlet of the sludge pipe is connected to the water inlet of the aeration tank.

Description

Technical Field

[0001] The invention belongs to the technical field of water treatment reaction devices, and in particular relates to a continuous flow water treatment reaction device based on aerobic granular sludge. Background Art

[0002] Compared to conventional activated sludge, aerobic granular sludge is less susceptible to sludge bulking, has strong shock resistance, can withstand high organic loads, and integrates microorganisms of different properties (aerobic, facultative, and anaerobic). It has been used in the treatment of municipal and industrial wastewater, effectively removing nitrogen and phosphorus, organic pollutants, and heavy metals.

[0003] The existing sewage treatment equipment using aerobic granular sludge has the following shortcomings:

[0004] 1. It is difficult to form aerobic granular sludge in a short period of time;

[0005] 2. The structure of aerobic granular sludge is unstable and easy to disintegrate;

[0006] 3. The sedimentation and separation efficiency of aerobic granular sludge is low. Summary of the Invention

[0007] In view of the problems raised by the above background technology, the purpose of the present invention is to provide a continuous flow water treatment reaction device based on aerobic granular sludge.

[0008] In order to achieve the above technical objectives, the technical solutions adopted by the present invention are as follows:

[0009] A continuous flow water treatment reaction device based on aerobic granular sludge, comprising a main water inlet pipe, the main water inlet pipe being connected to a left tank and a right tank of an anaerobic tank through two branch water inlet pipes, a plurality of microbial carriers being installed in each of the left and right tanks of the anaerobic tank, the left and right tanks of the anaerobic tank being connected to an aerobic tank through two branch water inlet pipes, the aerobic tank being connected to the left and right tanks respectively through two return pipes, the water outlet of the aerobic tank being connected to the water inlet of an aeration tank, the water outlet of the aerobic tank being provided with a carbon source injection port, the water channel in the aeration tank being distributed in a circuitous manner, the water channel being divided into an aeration section, a stirring section, and a slow-speed section, the water outlet end of the aeration tank being connected to a sedimentation tank, one outlet of the sedimentation tank being connected to a sludge pipe, the other outlet being connected to a main drain pipe, and the other outlet of the sludge pipe being connected to the water inlet of the aeration tank;

[0010] The microorganism carrier includes a plurality of annularly distributed carrier plates, each of which is provided with a plurality of micropores;

[0011] The cross-sectional shape of the water channel is a combination of a funnel shape and a rectangular shape;

[0012] The aeration section is equipped with an aeration mechanism, the stirring section is equipped with a stirring mechanism, and the deceleration section is equipped with a deceleration plate;

[0013] A plurality of evenly distributed sedimentation inclined plates are installed in the sedimentation tank.

[0014] It is further defined that the main water inlet pipeline is connected to a grid. Such a structural design blocks large pollutants in the main water inlet pipeline through the grid, thereby preventing the large pollutants from causing blockage of subsequent pipelines.

[0015] It is further defined that the branch water inlet pipeline and the outflow water pipeline are both installed with a first stop valve. With this structural design, the branch water inlet pipeline and the outflow water pipeline are controlled to be on and off by the first stop valve.

[0016] It is further defined that a reflux water pump connected to a reflux pipe is installed in the aerobic pool. Such a structural design provides reflux power for the liquid in the aerobic pool through the reflux water pump.

[0017] It is further defined that the carbon source in the carbon source injection port is a combined carbon source. Such a structural design improves the structural stability of the aerobic granular sludge and can improve the swelling phenomenon of the filamentous bacteria.

[0018] It is further defined that the sludge pipe is connected to a sludge pump and a second stop valve, and the second stop valve is closer to the outlet of the sedimentation tank than the sludge pump. Such a structural design provides power for transporting sludge through the sludge pump, and controls the opening and closing of the sludge pipe through the second stop valve.

[0019] It is further defined that a power-boosting water pump is installed at the water inlet of the aeration tank. Such a structural design enables the power-boosting water pump to provide the sewage entering the aeration tank with sufficient power to flow to the outlet of the aeration tank.

[0020] It is further defined that the aeration mechanism includes an aeration plate installed at the bottom of the canal, the aeration plate is connected to a strong distribution water pipe, the strong distribution water pipe is provided with a plurality of branches along the length direction, the branch pipes are provided with an air outlet, and the top of the strong distribution water pipe is provided with a top air outlet. Such a structural design provides gas through the aeration plate, limits the outlet position of the gas through the strong distribution water pipe and the branch pipe, and discharges gas through the air outlet and the top air outlet, thereby improving the aeration effect and stabilizing it.

[0021] It is further defined that the stirring mechanism includes a stirring motor, the output end of the stirring motor is connected to a stirring shaft, the stirring shaft is provided with a number of intermittently distributed fan blades, and the stirring section is provided with a water baffle below the stirring motor. Such a structural design drives the stirring shaft to rotate through the stirring motor, and completes the stirring of the sewage through the fan blades, and prevents water splashes from wetting the stirring motor and causing safety hazards through the water baffle.

[0022] It is further defined that the speed reducer is provided with mutually symmetrical wing plates, the wing plates are provided with a plurality of water holes, and a sludge through-hole is provided directly below the speed reducer. Such a structural design decelerates the sewage through the wing plates, throttles and decelerates the sewage through the water holes, and prevents sludge accumulation and blockage through the sludge through-holes.

[0023] Beneficial effects of the present invention:

[0024] 1. It can proliferate more polyphosphate bacteria and greatly improve the absorption efficiency of phosphorus in sewage;

[0025] 2. It can efficiently form aerobic granular sludge with a stable structure and not easy to disintegrate, with anaerobic polyphosphate bacteria as the core, shortening the sludge formation cycle;

[0026] 3. The sedimentation and separation efficiency of aerobic granular sludge is high and can be completed quickly;

[0027] 4. It has strong ability to absorb phosphorus and nitrogen from sewage as well as remove toxic substances and difficult-to-degrade substances. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention can be further illustrated by the non-limiting examples given in the accompanying drawings;

[0029] Figure 1 This is a structural schematic diagram of an embodiment of a continuous flow water treatment reaction device based on aerobic granular sludge according to the present invention;

[0030] Figure 2 This is a schematic structural diagram of an anaerobic tank in an embodiment of a continuous flow water treatment reaction device based on aerobic granular sludge according to the present invention;

[0031] Figure 3 This is a schematic structural diagram of an aeration tank in an embodiment of a continuous flow water treatment reaction device based on aerobic granular sludge according to the present invention;

[0032] Figure 4 This is a schematic structural diagram of a sedimentation tank in an embodiment of a continuous flow water treatment reaction device based on aerobic granular sludge according to the present invention;

[0033] Figure 5 This is a schematic structural diagram of a microbial carrier in an embodiment of a continuous flow water treatment reaction device based on aerobic granular sludge according to the present invention;

[0034] Figure 6 This is a schematic structural diagram of an aeration section in an embodiment of a continuous flow water treatment reaction device based on aerobic granular sludge according to the present invention;

[0035] Figure 7 This is a schematic structural diagram of a stirring section in an embodiment of a continuous flow water treatment reaction device based on aerobic granular sludge according to the present invention;

[0036] Figure 8 This is a schematic structural diagram of a slow-down section in an embodiment of a continuous flow water treatment reaction device based on aerobic granular sludge according to the present invention;

[0037] Figure 9 This is a schematic structural diagram of a deceleration plate in an embodiment of a continuous flow water treatment reaction device based on aerobic granular sludge according to the present invention;

[0038] The main component symbols are described as follows:

[0039] Main water inlet pipe 1, grille 2, first stop valve 3, aerobic tank 4;

[0040] Anaerobic tank 5, left tank 51, right tank 52, microorganism carrier 53, carrier plate 531, micropore 5311;

[0041] Carbon source injection port 6;

[0042] Aeration tank 7, aeration mechanism 71, aeration plate 711, strong distribution water pipe 712, branch pipe 713, top air outlet 714, stirring mechanism 72, stirring motor 721, stirring shaft 722, fan blade 723, water baffle 724, speed reducer 73, wing plate 731, water hole 7312, sludge through hole 7313, water channel 79, aeration section 791, stirring section 792, slowing section 793;

[0043] Sedimentation tank 8, sedimentation inclined plate 81;

[0044] Sludge pipe 9, second stop valve 91, sludge pump 92. DETAILED DESCRIPTION

[0045] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0046] like Figure 1-9 As shown, a continuous flow water treatment reaction device based on aerobic granular sludge of the present invention includes a main water inlet pipe 1, which is connected to the left tank 51 and the right tank 52 of the anaerobic tank 5 through two branch water inlet pipes. A number of microbial carriers 53 are installed in the left tank 51 and the right tank 52. The left tank 51 and the right tank 52 of the anaerobic tank 5 are connected to the aerobic tank 4 through two outflow pipes. The aerobic tank 4 is connected to the left tank 51 and the right tank 52 through two return pipes. 2 are connected, the outlet of the aerobic tank 4 is connected to the water inlet of the aeration tank 7, the outlet of the aerobic tank 4 is provided with a carbon source injection port 6, the water channel 79 in the aeration tank 7 is circuitously distributed, and the water channel 79 is divided into an aeration section 791, a stirring section 792, and a slowing section 793. The outlet end of the aeration tank 7 is connected to the sedimentation tank 8, one outlet of the sedimentation tank 8 is connected to the sludge pipe 9, and the other outlet is connected to the main discharge pipe. The other outlet of the sludge pipe 9 is connected to the water inlet of the aeration tank 7;

[0047] The microorganism carrier 53 includes a plurality of annularly distributed carrier plates 531 , each of which is provided with a plurality of micropores 5311 ;

[0048] The cross-sectional shape of the water channel 79 is a combination of a funnel shape and a rectangular shape;

[0049] The aeration section 791 is equipped with an aeration mechanism 71, the stirring section 792 is equipped with a stirring mechanism 72, and the deceleration section 793 is equipped with a deceleration plate 73;

[0050] A number of evenly distributed sedimentation inclined plates 81 are installed in the sedimentation tank 8 .

[0051] In this case, sewage flows from the main water inlet pipe 1 through two branch water inlet pipes into the anaerobic tank 5. Depending on the open and closed conditions of the branch water inlet pipes, the sewage chooses to flow into the left tank 51 or the right tank 52. When either the left tank 51 or the right tank 52 is full, the sewage chooses to flow into the other.

[0052] If the left tank 51 is full, the sewage will flow into the right tank 52 at this time. The sewage residence time in the left tank 51 is 1-2 hours, and the left tank 51 will return part of the sewage from the aerobic tank 4 through the return pipe. The sewage from the aerobic tank 4 will be saturated with polyphosphate bacteria that absorb phosphorus. The polyphosphate bacteria in the aerobic tank 4 is in an aerobic state. The polyphosphate bacteria can use PHB as an electron donor and oxygen as an electron acceptor to generate energy, so that the polyphosphate bacteria can absorb phosphorus and synthesize polyphosphate. The polyphosphate bacteria saturated with polyphosphate flows back to the anaerobic tank 5. The polyphosphate bacteria hydrolyze the polyphosphate to generate energy, and continue to proliferate on the microbial carrier 53 to breed a large number of polyphosphate bacteria. The phosphate produced is released into the water. In addition, it accumulates in the body. The glycogen in the water is also fermented to produce energy and electron transfer, so that the polyphosphate bacteria can absorb VFA in the water and synthesize PHB for storage. The microbial carrier 53 is provided with multiple carrier plates 531, and the carrier plates 531 are provided with micropores 5311. The multiple carrier plates 531 increase the attachment surface area, which is conducive to increasing the total amount of microorganisms. The micropores 5311 increase the roughness, which is convenient for microbial attachment. The sewage retention time is 1-2 hours. The reasons are as follows: if it is less than 1 hour, the polyphosphate bacteria cannot synthesize enough PHB. Without enough PHB, the polyphosphate bacteria cannot fully release and absorb phosphorus. If it is more than 2 hours, the polyphosphates are completely hydrolyzed and the glycogen is exhausted. At this time, the polyphosphate bacteria will ferment the PHB, which will seriously affect the aerobic process of the polyphosphate bacteria.

[0053] The sewage that has completed the reaction in the left tank 51 enters the aerobic tank 4 through the outlet pipe, and the phosphorus-accumulating bacteria that have grown in large quantities absorb phosphorus in the sewage in the aerobic tank 4;

[0054] Subsequently, the sewage is mixed with the carbon source in the carbon source injection port 6 and the aerobic granular sludge flowing back through the sludge pipe 9 and flows into the aeration tank 7. The aeration section 791 aerates the sewage to form aerobic granular sludge with polyphosphate bacteria as the core and other aerobic bacteria as the outer structure. As the number of polyphosphate bacteria increases greatly, the probability of forming aerobic granular sludge increases. The stirring section 792 completes the stirring of the sewage through the stirring mechanism 72. When the aerobic granular sludge passes through the narrow channel 79, the cross-sectional shape of the channel 79 is a combination of funnel and rectangular shapes. The lower portion has a relatively large height-to-diameter ratio, which is conducive to the formation of a large hydraulic shear force and assists in the formation of sludge. In addition, the stirring effect and the aeration in the aeration section 791 also increase the probability of collision between active particles, which is more conducive to the formation of aerobic granular sludge with a stable structure and a strong resistance to disintegration, with anaerobic polyphosphate bacteria as the core. The existence of the retarding section 793 serves as a buffer stage before the sewage enters the sedimentation tank 8, avoiding the exchange of water layers in the sedimentation tank 8, which leads to a decrease in sedimentation effect. In the retarding section 793, the aerobic granular sludge absorbs nitrogen in the sewage.

[0055] After the sewage enters the sedimentation tank 8, the sedimentation area is increased by the sedimentation inclined plate 81, thereby increasing the sedimentation and screening efficiency of the aerobic granular sludge. After 3-5 minutes of sedimentation, the aerobic granular sludge is completely lowered, and the flocculent sludge remains in the upper layer, completing the differentiation of the aerobic granular sludge. In the sedimentation tank 8, the toxic substances in the sewage are further digested. The sedimentation tank 8 forms a clear water layer G1, a sedimentation inclined plate 81 placement area, a bottom water area G2, and an aerobic granular sludge area G3 from top to bottom. The treated clear water layer G1 and part of the sludge flow out through the main drain pipe, and the aerobic granular sludge in the aeration tank G3 is sent to the inlet of the aeration tank 7 by the sludge pump 92 for recycling, completing the absorption of phosphorus and nitrogen from the sewage and the removal of toxic substances and difficult-to-degrade substances.

[0056] Preferably, the main water inlet pipe 1 is connected to a grille 2. This structural design blocks large contaminants in the main water inlet pipe 1 through the grille 2, preventing the large contaminants from clogging subsequent pipes. In fact, other structures for blocking large contaminants in the main water inlet pipe 1 can also be considered according to specific circumstances.

[0057] Preferably, the branch water inlet pipeline and the outgoing water pipeline are both installed with a first stop valve 3. Such a structural design controls the on-off of the branch water inlet pipeline and the outgoing water pipeline through the first stop valve 3. In fact, other structures for controlling the on-off of the branch water inlet pipeline and the outgoing water pipeline can also be considered according to specific circumstances.

[0058] Preferably, a reflux pump connected to the reflux pipe is installed in the aerobic pool 4. Such a structural design provides reflux power for the liquid in the aerobic pool 4 through the reflux pump. In fact, other structures that provide reflux power for the liquid in the aerobic pool 4 can also be considered according to specific circumstances.

[0059] Preferably, the carbon source in the carbon source injection port 6 is a combined carbon source. This structural design improves the structural stability of the aerobic granular sludge and can improve the swelling phenomenon of filamentous bacteria. In fact, other forms of carbon sources can also be considered according to specific circumstances.

[0060] Preferably, the sludge pipe 9 is connected to a sludge pump 92 and a second stop valve 91. The second stop valve 91 is closer to the outlet of the sedimentation tank 8 than the sludge pump 92. With this structural design, the sludge pump 92 provides the power for transporting sludge, and the second stop valve 91 controls the opening and closing of the sludge pipe 9. In fact, other structures on the sludge pipe 9 can also be considered according to specific circumstances.

[0061] Preferably, a booster pump is installed at the water inlet of the aeration tank 7. This structural design provides the sewage entering the aeration tank 7 with sufficient power through the booster pump to flow to the outlet of the aeration tank 7. In fact, other structures for providing power to the sewage in the aeration tank 7 can also be considered according to specific circumstances.

[0062] Preferably, the aeration mechanism 71 includes an aeration plate 711 mounted at the bottom of the water channel 79. The aeration plate 711 is connected to a strong distribution water pipe 712. The strong distribution water pipe 712 is provided with a plurality of branch pipes 713 along its length. Each branch pipe 713 is provided with an air outlet. The top of the strong distribution water pipe 712 is provided with a top air outlet 714. This structural design provides gas through the aeration plate 711, and the strong distribution water pipe 712 and branch pipes 713 define the gas outlet position. The gas is discharged through the air outlet and the top air outlet 714, thereby improving and stabilizing the aeration effect. In fact, other structural shapes of the aeration mechanism 71 can also be considered according to specific circumstances.

[0063] Preferably, the stirring mechanism 72 includes a stirring motor 721, the output end of which is connected to a stirring shaft 722, which is provided with a plurality of intermittently distributed fan blades 723. The stirring section 792 is provided with a water barrier 724 below the stirring motor 721. With this structural design, the stirring motor 721 drives the stirring shaft 722 to rotate, the fan blades 723 complete the stirring of the sewage, and the water barrier 724 prevents water splashes from wetting the stirring motor 721 and causing safety hazards. In fact, other structural shapes of the stirring mechanism 72 can also be considered according to specific circumstances.

[0064] Preferably, the speed reducer 73 is provided with symmetrical wings 731, each of which is provided with a plurality of water holes 7312. Sludge passage holes 7313 are provided directly below the speed reducer 73. This structural design decelerates the sewage through the wings 731, throttles and decelerates the sewage through the water holes 7312, and prevents sludge accumulation and blockage through the sludge passage holes 7313. In practice, other structural shapes of the speed reducer 73 may also be considered depending on specific circumstances.

[0065] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A continuous flow water treatment reaction device based on aerobic granular sludge, characterized by: The invention comprises a main water inlet pipe (1), wherein the main water inlet pipe (1) is connected to the left tank (51) and the right tank (52) of the anaerobic tank (5) through two branch water inlet pipes, wherein a plurality of microorganism carriers (53) are installed in the left tank (51) and the right tank (52), and the left tank (51) and the right tank (52) of the anaerobic tank (5) are connected to the aerobic tank (4) through two branch water pipes, wherein the aerobic tank (4) is connected to the left tank (51) and the right tank (52) through two return pipes, and the water outlet of the aerobic tank (4) is connected to the aerobic tank (4). The water inlet of the aeration tank (7) is connected, the water outlet of the aerobic tank (4) is provided with a carbon source injection port (6), the water channel (79) in the aeration tank (7) is distributed in a circuitous manner, and the water channel (79) is divided into an aeration section (791), a stirring section (792), and a slow speed section (793), the water outlet end of the aeration tank (7) is connected to a sedimentation tank (8), one outlet of the sedimentation tank (8) is connected to a sludge pipe (9), and the other outlet is connected to a main drain pipe, and the other outlet of the sludge pipe (9) is connected to the water inlet of the aeration tank (7); The microorganism carrier (53) includes a plurality of annularly distributed carrier plates (531), and the carrier plates (531) are provided with a plurality of micropores (5311); The cross-sectional shape of the water channel (79) is a combination of a funnel shape and a rectangular shape; The aeration section (791) is equipped with an aeration mechanism (71), the stirring section (792) is equipped with a stirring mechanism (72), and the deceleration section (793) is equipped with a deceleration plate (73); A plurality of evenly distributed sedimentation inclined plates (81) are installed in the sedimentation tank (8).

2. The continuous flow water treatment reaction device based on aerobic granular sludge according to claim 1, characterized in that: The main water inlet pipe (1) is connected to a grille (2).

3. The continuous flow water treatment reaction device based on aerobic granular sludge according to claim 2, characterized in that: The branch water inlet pipeline and the branch water outlet pipeline are both installed with a first stop valve (3).

4. The continuous flow water treatment reaction device based on aerobic granular sludge according to claim 3, characterized in that: A reflux water pump connected to a reflux pipe is installed in the aerobic tank (4).

5. The continuous flow water treatment reaction device based on aerobic granular sludge according to claim 4, characterized in that: The carbon source in the carbon source injection port (6) is a combined carbon source.

6. The continuous flow water treatment reaction device based on aerobic granular sludge according to claim 5, characterized in that: The sludge pipe (9) is connected to a sludge pump (92) and a second stop valve (91), and the second stop valve (91) is closer to the outlet of the sedimentation tank (8) than the sludge pump (92).

7. The continuous flow water treatment reaction device based on aerobic granular sludge according to claim 6, characterized in that: A booster water pump is installed at the water inlet of the aeration tank (7).

8. The continuous flow water treatment reaction device based on aerobic granular sludge according to claim 7, characterized in that: The aeration mechanism (71) includes an aeration plate (711) installed at the bottom of the water channel (79). The aeration plate (711) is connected to a strong distribution water pipe (712). The strong distribution water pipe (712) is provided with a plurality of branch pipes (713) along the length direction. The branch pipes (713) are provided with air outlets. The top end of the strong distribution water pipe (712) is provided with a top air outlet (714).

9. The continuous flow water treatment reaction device based on aerobic granular sludge according to claim 8, characterized in that: The stirring mechanism (72) includes a stirring motor (721), the output end of the stirring motor (721) is connected to a stirring shaft (722), the stirring shaft (722) is provided with a plurality of intermittently distributed fan blades (723), and the stirring section (792) is provided with a water baffle (724) below the stirring motor (721).

10. The continuous flow water treatment reaction device based on aerobic granular sludge according to claim 9, characterized in that: The deceleration plate (73) is provided with mutually symmetrical wing plates (731), the wing plates (731) are provided with a plurality of water holes (7312), and a sludge through hole (7313) is provided directly below the deceleration plate (73).

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