Culture device for strengthening granulation of phycomycete sludge

Abstract

The utility model discloses a culture device for strengthening granulation of phycomycete sludge, and belongs to the field of wastewater treatment. The reactor is divided into a jet water inlet area, a circulation reaction area and a mud-water separation area which are communicated with one another from bottom to top. The jet water inlet area is provided with a jet pipe, a sludge collecting tank and a sludge outlet, and the sludge-water separation area is provided with a three-phase separator, an overflow weir, a water outlet pipe, an exhaust pipe, a water quality detection device and the like. And an inner-layer guide cylinder and an outer-layer guide cylinder with zigzag corrugated structures are arranged in the circulation reaction area. The circulation reaction area is divided into a circulation ascending area, an inner-layer circulation descending area and an outer-layer circulation descending area which are different in sectional area from inside to outside, light sources for promoting algae growth are arranged in the inner-layer circulation descending area and the outer-layer circulation descending area, and the intensity of the light source in the outer-layer circulation descending area is larger than that of the inner-layer circulation descending area. According to the device, the granulation process of sludge with different particle sizes can be intensified in a quality-divided manner, and rapid and efficient granulation culture of phycomycete sludge is realized.

Description

Technical Field

[0001] The utility model belongs to the field of wastewater treatment, and particularly relates to a cultivation device for enhancing granulation of algal-bacterial sludge. Background Art

[0002] With the growth of the global population and the intensification of industrial activities, traditional sewage treatment methods are facing challenges of high energy consumption and large carbon emissions. The green sustainability of traditional sewage treatment methods has been questioned. In the field of wastewater treatment, the algal-bacterial symbiotic technology is mainly based on the interaction between algae and bacteria. Algae release oxygen through photosynthesis for the respiration of bacteria, while bacteria decompose organic substances to provide nutrients such as carbon dioxide for algae. This synergistic effect can not only reduce the oxygen supply for sewage treatment and lower energy consumption, but also reduce carbon dioxide emissions during the process, showing significant green and low-carbon performance.

[0003] Algal-bacterial granular sludge is an important form of the microalgae-bacteria symbiotic system, which can effectively solve the problem of sedimentation separation in the traditional microalgae-bacteria symbiotic system, and has advantages such as low energy consumption, low greenhouse gas emissions, and great potential for resource recovery. The efficient uptake ability of microalgae for organic matter and nutrient elements, the strong degradation ability of bacteria for pollutants, and the high sedimentation performance are combined in the granular sludge. Although the algal-bacterial sludge technology has theoretical advantages, it still faces the problems of rapid and stable granulation in the application process. Therefore, there is an urgent need to design a device and method for realizing the rapid and efficient granulation cultivation of algal-bacterial sludge. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problems of slow granulation speed and poor cultivation effect in the cultivation of algal-bacterial granular sludge in the prior art, and to provide a cultivation device for enhancing granulation of algal-bacterial sludge.

[0005] The specific technical solutions adopted by the utility model are as follows:

[0006] The utility model provides a cultivation device for enhancing granulation of algal-bacterial sludge, which includes a reactor, a jet aeration device, and a reflux system; the reactor is divided into a jet water inlet area, a circulation reaction area, and a sedimentation separation area that are connected to each other from bottom to top; the jet aeration device includes a jet pump, a water inlet pipe, and a jet pipe; the reflux system includes a reflux pipe, a reflux valve, and a reflux pump;

[0007] The jet pipe is arranged at the bottom of the jet water inlet area of the reactor, and the jet pipe is arranged vertically upward; the inlet of the jet pipe is connected to a water inlet tank through a water inlet pipe, and a jet pump for controlling water inlet is arranged on the water inlet pipe; an air inlet pipe is also arranged on the water inlet pipe, and an air valve is arranged on the air inlet pipe; a funnel-shaped sludge collection tank is formed at the bottom of the reactor, and a sludge discharge pipe is arranged on the sludge collection tank;

[0008] An inner draft tube and an outer draft tube are arranged from the inside to the outside in the circulating reaction zone of the reactor, and the height of the inner draft tube is equal to the height of the circulating reaction zone, while the height of the outer draft tube is lower than that of the inner draft tube; serrated corrugated structures are evenly distributed on the inner draft tube and the outer draft tube; the space inside the inner draft tube is the circulating rising zone, the inner circulating descending zone is formed between the inner draft tube and the outer draft tube, and the outer circulating descending zone is formed between the outer draft tube and the reactor wall of the reactor; light sources for promoting the growth of algae are provided in the inner circulating descending zone and the outer circulating descending zone, and the light source intensity in the outer circulating descending zone is greater than that in the inner circulating descending zone; a plurality of sampling ports are arranged at intervals along the axial direction on the reactor wall of the reactor, and the sampling ports are communicated with the outer circulating descending zone;

[0009] A precipitation slope for mud-water separation is formed at the bottom of the mud-water separation zone of the reactor; a three-phase separator, an overflow weir and a water quality monitoring device are arranged in the mud-water separation zone; a water outlet pipe is arranged on the side wall at the top of the mud-water separation zone; the top of the three-phase separator is communicated with the outside atmosphere through an exhaust pipe; the overflow weir is arranged above the three-phase separator, and the liquid after mud-water separation flows to the water outlet pipe through the overflow weir; the water quality monitoring device is arranged at the top of the mud-water separation zone and monitors the water quality change through a probe;

[0010] One end of the reflux pipe is communicated with the middle of the mud-water separation zone, and the other end is communicated with the jet water inlet zone; a reflux valve and a reflux pump for adjusting the reflux ratio are arranged on the reflux pipe.

[0011] Preferably, the height-diameter ratio of the circulating reaction zone is 1:(4-8).

[0012] Preferably, the angle between the precipitation slope at the bottom of the mud-water separation zone and the horizontal plane is 55°-60°.

[0013] Preferably, the ratio of the width to the depth of the serrations of the serrated corrugations evenly distributed on the inner draft tube and the outer draft tube is 1:(0.5-1).

[0014] Preferably, the inner draft tube body diameter is denoted as d1, the outer draft tube body diameter is denoted as d2, and the inner diameter of the reactor wall is denoted as d3, d1 2 <(d3 2 -d2 2 )<(d2 2 -d1 2 ), that is, the cross-sectional area of the inner circulating descending zone is the largest, and the cross-sectional area of the circulating rising zone is the smallest.

[0015] Preferably, the light source adopts LED lamp tubes and is evenly arranged circumferentially in the inner circulating descending zone and the outer circulating descending zone of the reactor; the number ratio of the light sources in the inner circulating descending zone and the outer circulating descending zone is 1:(1.5-3).

[0016] Further, the light source intensity in the inner circulation descending area is 120 - 200 μmol·m -2 ·s -1 , and the light source intensity in the outer circulation descending area is 160 - 240 μmol·m -2 ·s -1 .

[0017] Preferably, the overflow weir is a triangular overflow weir, and the height of the serrated part of the triangular overflow weir does not exceed 100 mm.

[0018] Preferably, the included angle between the side wall of the sludge collection tank and the horizontal plane is 50° - 65°.

[0019] Preferably, the bottom diameter of the sludge collection tank is 1 / 4 - 1 / 3 of the reactor diameter.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] In the reactor provided by the utility model, the circulation reaction area forms three relatively independent reaction areas from the inside to the outside by arranging inner and outer guide cylinders. The serrated corrugation design on the surface of the guide cylinder enhances the shearing effect on the sludge, which can promote the granulation of algal-bacterial sludge; through the difference in the height of the inner and outer guide cylinders and the cross-sectional area of different sedimentation areas, the sorting of sludge particles of different sizes is realized; through the differential design of the light source position in the circulation reaction area and the light intensity of the inner and outer guide cylinders, the heterogeneous strengthening of the sorted sludge particles can be achieved.

[0022] The device provided by the utility model can realize the rapid and efficient granulation culture of algal-bacterial sludge, and improves the retention and pollution removal performance of algal-bacterial sludge. Description of the Drawings

[0023] Figure 1 is a schematic diagram of the culture device for strengthening the granulation of algal-bacterial sludge provided in this embodiment;

[0024] Figure 2 is Figure 1 the sectional view at A - A in

[0025] Figure 3 the sectional structure schematic diagram of the circulation reaction area in this embodiment;

[0026] In the figure: jet water inlet area Ⅰ, circulating reaction area Ⅱ, sludge-water separation area Ⅲ; water inlet tank 1, jet pump 2, water inlet pipe 3, air inlet pipe 4, air valve 5, jet pipe 6, circulating rising area 7, inner circulating falling area 8, outer circulating falling area 9, inner draft tube 10, outer draft tube 11, light source 12, reactor wall 13, sedimentation slope 14, three-phase separator 15, overflow weir 16, water quality monitoring device 17, exhaust pipe 18, water outlet pipe 19, return pipe 20, return valve 21, return pump 22, sludge collection tank 23, sludge discharge pipe 24, sampling port 25. Specific implementation manner

[0027] The present utility model will be further elaborated and described below in conjunction with the accompanying drawings and specific implementation manners. Under the premise that there is no conflict between the technical features of each implementation manner in the present utility model, corresponding combinations can be made.

[0028] Algal-bacterial granular sludge is an important form of the microalgae-bacteria symbiotic system, which can effectively solve the problem of sludge-water separation in the traditional microalgae-bacteria symbiotic system, and has the advantages of low energy consumption, low greenhouse gas emissions, and great potential for resource recovery. The algal-bacterial granular sludge technology uses photosynthesis to improve the supply of oxygen, which can not only significantly reduce energy consumption, but also promote carbon fixation and nutrient removal through photosynthesis, thus showing its unique advantages in terms of environmental friendliness and economic benefits. Due to the unique biological community structure of algal-bacterial granular sludge, it can operate stably under a wider range of environmental conditions, but still faces the problems of rapid and stable granulation in the application process.

[0029] In view of the above problems, the present utility model provides a cultivation device for enhancing the granulation of algal-bacterial sludge. As a preferred embodiment of the specific implementation manner of the present utility model, the cultivation device provided in this embodiment is as Figure 1 shown. The cultivation device includes a reactor, a jet aeration device, and a reflux system.

[0030] Among them, the reactor is divided into a jet water inlet area I, a circulating reaction area II, and a sludge-water separation area III that are connected to each other from bottom to top; the jet aeration device includes a jet pump 2, a water inlet pipe 3, and a jet pipe 6; the reflux system includes a reflux pipe 20, a reflux valve 21, and a reflux pump 22.

[0031] The jet pipe 6 is arranged at the bottom of the jet water inlet area I of the reactor, and the jet pipe 6 is arranged vertically upward; the inlet of the jet pipe 6 is connected to the water inlet tank 1 through the water inlet pipe 3, and a jet pump 2 for controlling the water inlet is arranged on the water inlet pipe 3. An air inlet pipe 4 is also arranged on the water inlet pipe 3, and an air valve 5 is arranged on the air inlet pipe 4; a funnel-shaped sludge collection tank 23 is formed at the bottom of the reactor, and a sludge discharge pipe 24 is arranged on the sludge collection tank 23;

[0032] In the device provided by the present utility model, an inner draft tube 10 and an outer draft tube 11 are arranged from the inside to the outside in the circulating reaction zone II of the reactor, and the height of the inner draft tube 10 is equal to the height of the circulating reaction zone II, while the height of the outer draft tube 11 is lower than that of the inner draft tube 10.

[0033] As Figure 2 shown, in the device provided by the present utility model, the inner space of the inner draft tube 10 is the circulating rising zone 7, an inner circulating falling zone 8 is formed between the inner draft tube 10 and the outer draft tube 11, and an outer circulating falling zone 9 is formed between the outer draft tube 11 and the reactor wall 13 of the reactor. The diameter of the inner draft tube 10 is denoted as d1, the diameter of the outer draft tube 11 is denoted as d2, and the inner diameter of the reactor wall 13 is denoted as d3. In this embodiment, d1 2 <(d3 2 - d2 2 ) < (d2 2 - d1 2 ), that is, the cross-sectional area of the inner circulating falling zone 8 is the largest, and the cross-sectional area of the circulating rising zone 7 is the smallest.

[0034] As Figure 3 shown, in the device provided by the present utility model, serrated corrugated structures are uniformly distributed on the inner draft tube 10 and the outer draft tube 11, and the serrated corrugated structures can apply mechanical shear force to accelerate sludge granulation. The width-depth ratio of the serrations of the serrated corrugations can be set to 1:(0.5 - 1).

[0035] In the device provided by the present utility model, light sources 12 for promoting the growth of algae are provided in the inner circulating falling zone 8 and the outer circulating falling zone 9, and the light intensity in the outer circulating falling zone 9 is greater than that in the inner circulating falling zone 8.

[0036] In this embodiment, the light source 12 adopts an LED lamp tube. The LED lamp tube is arranged longitudinally along the circulating reaction zone II. As Figure 2 shown, in the inner circulating falling zone 8 and the outer circulating falling zone 9, a number of LED lamp tubes are uniformly arranged along the circumferential direction of the reactor. In this embodiment, the number ratio of the light sources 12 in the inner circulating falling zone 8 and the outer circulating falling zone 9 is 1:2, that is, 4 LED lamp tubes are arranged in the inner circulating falling zone 8, and 8 LED lamp tubes are arranged in the outer circulating falling zone 9. The light intensity of the light source 12 in the inner circulating falling zone 8 can be set to 120 - 200 μmol·m -2 ·s -1 , and the light intensity of the light source 12 in the outer circulating falling zone 9 can be set to 160 - 240 μmol·m -2 ·s -1 .

[0037] In the device provided by the present utility model, a plurality of sampling ports 25 are arranged at intervals along the axial direction on the reactor wall 13 of the reactor, and the sampling ports 25 communicate with the outer circulation descending zone 9. A precipitation slope 14 for mud-water separation is formed at the bottom of the mud-water separation zone III of the reactor.

[0038] A three-phase separator 15, an overflow weir 16 and a water quality monitoring device 17 are arranged in the mud-water separation zone III. A water outlet pipe 19 is arranged on the side wall at the top of the mud-water separation zone III; the top of the three-phase separator 15 is communicated with the outside atmosphere through an exhaust pipe 18; the overflow weir 16 is arranged above the three-phase separator 15, and the liquid after mud-water separation flows to the water outlet pipe 19 through the overflow weir 16; the water quality monitoring device 17 is arranged at the top of the mud-water separation zone III and monitors the water quality change through a probe; the water quality monitoring device 17 includes a pH detection probe, a dissolved oxygen detection probe, etc.

[0039] In the device provided by the present utility model, one end of a reflux pipe 20 communicates with the middle part of the mud-water separation zone III, and the other end communicates with the jet water inlet zone I; a reflux valve 21 and a reflux pump 22 for adjusting the reflux ratio are arranged on the reflux pipe 20.

[0040] The structural setting parameters of the culture device provided by the present utility model can be as follows:

[0041] The height-diameter ratio of the circulation reaction zone II is 1:(4-8). The precipitation slope 14 at the bottom of the mud-water separation zone III is enlarged in a flared shape, and the angle between the precipitation slope 14 and the horizontal plane is 55°-60°. The overflow weir 16 adopts a triangular overflow weir, and the overflow speed can be adjusted according to the water volume. The height of the serrated part of the triangular overflow weir does not exceed 100 mm. The angle between the side wall of the sludge collection tank 23 and the horizontal plane is 50°-65°; the bottom diameter of the sludge collection tank 23 is 1 / 4-1 / 3 of the reactor diameter.

[0042] The following provides a culture method for strengthening granulation of algal bacteria sludge by using the above culture device, and the specific steps are as follows:

[0043] S1: Aerobic granular sludge is inoculated into the reactor, and the light source 12 provides conditions for the growth of algae according to the light and darkness ratio of 12 h:12 h. At the same time, simulated wastewater is configured and placed in the water inlet tank 1 for standby.

[0044] S2: Start the jet pump 1, and the jet pipe 6 conveys the simulated wastewater in the water inlet tank 1 to the jet water inlet zone I of the reactor; open the air valve 5, and the air inlet pipe 4 conveys oxygen to the jet water inlet zone I of the reactor for efficient aeration through a strong mixing effect; optimize the oxygen supply amount by adjusting the opening of the air valve 5 on the air inlet pipe 4.

[0045] S3: The simulated wastewater and oxygen are mixed to form a gas-liquid mixture, which enters the circulation reaction zone II of the reactor and flows upward through the circulation rising zone 7 to the three-phase separator 15 inside the sludge-water separation zone III. Under the separation of the three-phase separator 15, the gas in the gas-liquid mixture is discharged into the external atmosphere through the exhaust pipe 18, and the sludge flows downward and returns to the precipitation slope 14; under the sludge-water separation of the precipitation slope 14, the clarified liquid after precipitation is discharged from the reactor through the overflow weir 16 and the outlet pipe 19;

[0046] The separated sludge flows downward and returns to the circulation reaction zone II. Due to the surface velocity difference caused by the different cross-sectional areas of the inner circulation descending zone 8 and the outer circulation descending zone 9, the larger particles in the sludge enter the inner circulation descending zone 8, and the smaller particles enter the outer circulation descending zone 9, realizing the separation of particle sizes based on sedimentation performance; the serrated corrugated structures uniformly distributed on the inner draft tube 10 and the outer draft tube 11 exert mechanical shear force on the sludge, accelerating the granulation of the sludge particles;

[0047] The light source intensity in the outer circulation descending zone 9 is greater than that in the inner circulation descending zone 8, making the proportion of algae in the smaller particles in the outer circulation descending zone 9 the same as that in the larger particles in the inner circulation descending zone 8, so as to achieve the purpose of regulating the algal-bacterial ratio in the algal-bacterial granular sludge.

[0048] S4: Part of the simulated wastewater is refluxed to the jet water inlet zone I of the reactor through the reflux pipe 20. By adjusting the opening of the reflux valve 21 on the reflux pipe 20 and the rotation speed of the reflux pump 22, the reflux ratio of the simulated wastewater is controlled at 1:2 - 5; the excess sludge settles to the sludge collection tank 23 at the bottom and is discharged from the reactor through the sludge discharge pipe 24; through enrichment and domestication, algal-bacterial sludge with Chlorella vulgaris, filamentous cyanobacteria, and organic matter-degrading bacteria as the dominant flora is cultivated; the formed algal-bacterial granular sludge is taken out through the sampling port 25, and the amount does not exceed 1 / 3 of the total sludge amount in the reactor.

[0049] Generally speaking, there are fewer algae and more bacteria in the smaller granular sludge, and more algae and fewer bacteria in the larger granular sludge. Therefore, it is necessary to arrange more light sources and set a stronger light intensity in the outer circulation descending zone 9 to promote the growth of algae in the smaller granular sludge, and arrange fewer light sources and set a weaker light intensity in the inner circulation descending zone 8 to inhibit the growth of algae in the larger granular sludge, so as to regulate the algal-bacterial ratio and optimize the overall algal-bacterial ratio in the reactor. The smaller granular sludge and the larger granular sludge mentioned here are in a relative state, and no specific size limit is imposed on the granular sludge.

[0050] After the algal-bacterial sludge enhanced granulation culture is carried out by using the culture device provided in this embodiment, the obtained algal-bacterial sludge particles are usually dark green or yellowish green in color, with uniform particle size, about 1-2 mm in diameter, spherical or quasi-spherical in shape, smooth and compact on the surface, without obvious fragmentation or damage; having good sedimentation property, in the sedimentation test, the sedimentation effect of the mud and water separation is obvious, and the supernatant is clear; the algae and bacteria are stably symbiotic, having high metabolic activity and being able to rapidly degrade pollutants.

[0051] The above-described embodiments are only a preferred solution of the present invention, but they are not intended to limit the present invention. Those of ordinary skill in the relevant technical field can also make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all technical solutions obtained by adopting the equivalent replacement or equivalent transformation method fall within the protection scope of the present invention.

Claims

1. A culture device for enhancing granulation of algae-bacteria sludge, characterized in that: The invention comprises a reactor, a jet aeration device and a reflux system; the reactor is divided from bottom to top into a jet water inlet zone (I), a circulating reaction zone (II) and a mud-water separation zone (III) which are interconnected; the jet aeration device comprises a jet pump (2), a water inlet pipe (3) and a jet pipe (6); the reflux system comprises a reflux pipe (20), a reflux valve (21) and a reflux pump (22); The jet pipe (6) is arranged at the bottom of the jet water inlet area (I) of the reactor, and the jet pipe (6) is arranged vertically upward; the inlet of the jet pipe (6) is connected to the water inlet box (1) through the water inlet pipe (3), and the water inlet pipe (3) is provided with a jet pump (2) for controlling the water inlet; the water inlet pipe (3) is also provided with an air inlet pipe (4), and the air inlet pipe (4) is provided with an air valve (5); a funnel-shaped mud collecting trough (23) is formed at the bottom of the reactor, and a mud discharge pipe (24) is provided on the mud collecting trough (23); An inner draft tube (10) and an outer draft tube (11) are arranged from the inside to the outside in the circulating reaction zone (II) of the reactor, and the height of the inner draft tube (10) is equal to the height of the circulating reaction zone (II), and the height of the outer draft tube (11) is lower than the height of the inner draft tube (10); sawtooth corrugated structures are evenly distributed on the inner draft tube (10) and the outer draft tube (11); the inner side space of the inner draft tube (10) is the circulating rising zone (7), and the space between the inner draft tube (10) and the outer draft tube (11) is An inner layer circulation descending zone (8) is formed, and an outer layer circulation descending zone (9) is formed between the outer layer flow guide tube (11) and the reactor wall (13) of the reactor; light sources (12) for promoting algae growth are provided in the inner layer circulation descending zone (8) and the outer layer circulation descending zone (9), and the intensity of the light source in the outer layer circulation descending zone (9) is greater than that in the inner layer circulation descending zone (8); a plurality of sampling ports (25) are provided at intervals along the axial direction on the reactor wall (13) of the reactor, and the sampling ports (25) are connected to the outer layer circulation descending zone (9); A sedimentation slope (14) for mud-water separation is formed at the bottom of the mud-water separation zone (III) of the reactor; a three-phase separator (15), an overflow weir (16) and a water quality monitoring device (17) are provided in the mud-water separation zone (III); a water outlet pipe (19) is provided on the side wall at the top of the mud-water separation zone (III); the top of the three-phase separator (15) is connected to the outside atmosphere through an exhaust pipe (18); the overflow weir (16) is arranged above the three-phase separator (15), and the liquid after mud-water separation flows to the water outlet pipe (19) through the overflow weir (16); the water quality monitoring device (17) is arranged at the top of the mud-water separation zone (III) to monitor water quality changes through a probe; One end of the return pipe (20) is connected to the middle of the mud-water separation zone (III), and the other end is connected to the jet water inlet zone (I); the return pipe (20) is provided with a return valve (21) for adjusting the return ratio and a return pump (22).

2. The algae-bacteria sludge enhanced granulation culture device according to claim 1, characterized in that: The height-to-diameter ratio of the circulating reaction zone (II) is 1:(4-8).

3. The culture device for enhanced granulation of algae-bacteria sludge according to claim 1, characterized in that: The angle between the sedimentation slope (14) at the bottom of the mud-water separation zone (III) and the horizontal plane is 55° to 60°.

4. The algae-bacteria sludge enhanced granulation culture device according to claim 1, characterized in that: The sawtooth width-to-depth ratio of the sawtooth corrugations evenly distributed on the inner layer flow guide tube (10) and the outer layer flow guide tube (11) is 1:(0.5-1).

5. The culture device for enhanced granulation of algae-bacteria sludge according to claim 1, characterized in that: The diameter of the inner draft tube (10) is denoted as d1, the diameter of the outer draft tube (11) is denoted as d2, the inner diameter of the reactor wall (13) is denoted as d3, and d1 2 <(d3 2 -d2 2 )<(d2 2 -d1 2 ), that is, the cross-sectional area of ​​the inner circulation descending zone (8) is the largest, and the cross-sectional area of ​​the circulation ascending zone (7) is the smallest.

6. The algae-bacteria sludge enhanced granulation culture device according to claim 1, characterized in that: The light sources (12) are LED lamp tubes, which are evenly arranged in the inner circulation descending zone (8) and the outer circulation descending zone (9) along the circumference of the reactor; the ratio of the number of light sources (12) in the inner circulation descending zone (8) and the outer circulation descending zone (9) is 1:(1.5-3).

7. The culture device for enhanced granulation of algae-bacteria sludge according to claim 6, characterized in that: The intensity of the light source (12) in the inner layer circulation descending zone (8) is 120 to 200 μmol·m -2 ·s -1 The intensity of the light source (12) in the descending zone (9) of the outer circulation is 160-240 μmol·m -2 ·s -1 .

8. The algae-bacteria sludge enhanced granulation culture device according to claim 1, characterized in that: The overflow weir (16) is a triangular overflow weir, and the height of the sawtooth portion of the triangular overflow weir does not exceed 100 mm.

9. The algae-bacteria sludge enhanced granulation culture device according to claim 1, characterized in that: The angle between the side wall of the mud collecting trough (23) and the horizontal plane is 50° to 65°.

10. The algae-bacteria sludge enhanced granulation culture device according to claim 1, characterized in that: The bottom diameter of the mud collecting tank (23) is 1 / 4 to 1 / 3 of the diameter of the reactor.

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