Single-stage aerobic SBR (sequencing batch reactor)

Abstract

The invention discloses a single-stage aerobic SBR (Sequencing Batch Reactor), which relates to the technical field of water treatment and comprises a reaction vessel, a water inlet assembly positioned on one side of the reaction vessel, a sewage discharge assembly positioned on the other side of the reaction vessel, a suspension plate positioned in the middle of the reaction vessel and a suspension tank assembly positioned at the upper part of the interior of the reaction vessel, the reaction vessel is of a hollow structure composed of a bottom cone and a top cylinder, the single-stage aerobic SBR reactor utilizes domesticated and cultured sludge to react with water, meanwhile, the reaction of the sludge and the water is accelerated through the stirring shaft, and then the treated water is subjected to layered recovery through the suspension tank assembly; according to the single-stage aerobic SBR phosphorus removal technology, phosphorus can be efficiently removed under the condition that the concentration of nutrient substances in inflow water is deficient, meanwhile, the single-stage aerobic SBR phosphorus removal technology does not need to be provided with an anaerobic section, the phosphorus removal effect is good, operation is easy and convenient, and the influence of nitrate on the phosphorus removal technology is small, and the existing water quality and facility conditions of a power plant can meet the phosphorus removal requirement of the technology.

Description

Technical Field

[0001] The invention relates to the technical field of water treatment, in particular to a single-stage aerobic SBR reactor. Background Art

[0002] The pollutants contained in urban recycled water and the corresponding chemicals added later can often reach 4 to 5 times the amount of the incoming water after being concentrated through the cooling circulation system, causing problems such as excessive nitrogen and phosphorus content in the circulating cooling water and high inorganic salt ion concentration, which has a relatively adverse impact on its reuse or discharge.

[0003] At present, most power plants use the effluent from the Xigu sewage treatment plant as cooling circulating water, which saves water resources. However, during the use of circulating cooling water, phosphates are enriched due to evaporation and other reasons, causing the concentration of nutrients such as nitrogen and phosphorus in the water to gradually increase, which will cause eutrophication of the water body. If the water is discharged in an emergency, it will bring the risk of environmental pollution.

[0004] The existing biological treatment process of the power plant can meet the requirements of efficient removal of other pollutants, but the phosphorus removal effect is not satisfactory. It is necessary to add a phosphorus removal process to reduce the burden of subsequent biochemical treatment and reduce the environmental risks caused by emissions. In the early stage, the power plant technicians used chemical and physical methods to remove phosphorus. Although this method has great operational flexibility, high phosphorus removal efficiency, simple operation, and the effluent can meet the needs of the power plant, it has high operating costs, increases sludge volume by 60% to 70%, and reduces sludge concentration by about 20%. If the generated precipitate is not properly handled, it will cause secondary pollution to the environment. In addition, the phosphorus removal agent added to it will increase the content of heavy metal ions in the water, affecting the subsequent biochemical treatment process and bringing new environmental risks. Summary of the invention

[0005] In view of the above problems existing in the prior art, the present invention is proposed.

[0006] Therefore, the present invention aims to solve the problem of high phosphorus content in circulating cooling water of thermal power plants.

[0007] To solve the above technical problems, the present invention provides the following technical solutions: a single-stage aerobic SBR reactor, comprising a reaction vessel, a water inlet assembly located on one side of the reaction vessel, a sewage discharge assembly located on the other side of the reaction vessel, a suspension plate located in the middle of the reaction vessel, and a suspension tank assembly located above the interior of the reaction vessel.

[0008] As a preferred solution of the single-stage aerobic SBR reactor described in the present invention, the reaction vessel is a hollow structure consisting of a bottom cone and a top cylinder.

[0009] As a preferred embodiment of the single-stage aerobic SBR reactor described in the present invention, the water inlet assembly includes a water inlet trough, the water inlet trough is located on one side of the reaction vessel, a water inlet pipe is fixedly connected to the inside of the water inlet trough, one end of the water inlet pipe away from the water inlet trough is fixedly connected to the inside of the reaction vessel, a water pump including a fixed plate is fixedly connected to the water inlet pipe, the fixed plate is fixedly connected to the top of the reaction vessel, a motor is fixedly connected to the bottom of the fixed plate, a stirring shaft is fixedly connected to the output shaft end of the motor, and a sewage pipe is fixedly connected to the inside of the reaction vessel and on one side of the stirring shaft.

[0010] As a preferred solution of the single-stage aerobic SBR reactor described in the present invention, the bottom of the stirring shaft is fixedly connected with a spiral stirring blade, and the bottom of the sewage pipe fits the bottom shape of the reaction vessel.

[0011] As a preferred embodiment of the single-stage aerobic SBR reactor described in the present invention, the suspended plate is located inside the reaction vessel, the cross-sectional area of ​​the suspended plate is smaller than the upper cross-sectional area of ​​the reaction vessel, and the material density of the suspended plate is smaller than the density of water.

[0012] As a preferred solution of the single-stage aerobic SBR reactor described in the present invention, a stirring positioning hole is provided in the middle of the suspension plate, and a sewage discharge positioning hole is provided at the top corner of the surface of the suspension plate.

[0013] As a preferred embodiment of the single-stage aerobic SBR reactor described in the present invention, the suspension tank assembly includes a water outlet tank 1, a water outlet pipe is fixedly connected to the inside of the water outlet tank 1, a water outlet tank 2 is arranged at the bottom of the end of the water outlet pipe away from the water outlet tank 1, a plurality of counterweight balls are fixedly connected to the inside of the water outlet tank 2, a positioning block is fixedly connected to the bottom of the water outlet tank 2, an air bag is fittedly connected below the positioning block, an air intake valve is fixedly connected to the bottom of the air bag, a connecting pipe is fixedly connected to the bottom of the air intake valve, and the end of the connecting pipe away from the air bag is located outside the reaction vessel.

[0014] As a preferred solution of the single-stage aerobic SBR reactor described in the present invention, the weighted balls are evenly arranged inside the second water outlet trough, and the water outlet pipe is located above the weighted balls, and the positioning block and the air bag are mutually engaged.

[0015] As a preferred solution of the single-stage aerobic SBR reactor described in the present invention, the stirring shaft passes through the stirring positioning hole on the suspension plate, and the sewage pipe passes through the sewage positioning hole on the suspension plate.

[0016] The beneficial effects of the present invention are as follows: the single-stage aerobic SBR reactor utilizes the domesticated and cultured sludge to react with water, and accelerates the reaction of the sludge and water through a stirring shaft, and then uses a suspension tank component to recover the treated water in layers, so that phosphorus can be removed efficiently when the concentration of influent nutrients is scarce. At the same time, the single-stage aerobic SBR phosphorus removal process is a phosphorus removal process that does not require the setting of an anaerobic section, has a good phosphorus removal effect, is easy to operate, and is less affected by nitrates. The existing water quality and facility conditions of the power plant can meet the phosphorus removal requirements of the process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0018] Figure 1 A schematic diagram of the overall structure of a single-stage aerobic SBR reactor provided by the present invention;

[0019] Figure 2 A detailed diagram of the internal structure of a single-stage aerobic SBR reactor provided by the present invention;

[0020] Figure 3 A cross-sectional view of a single-stage aerobic SBR reactor provided by the present invention;

[0021] Figure 4 A detailed view of a suspension plate in a single-stage aerobic SBR reactor provided by the present invention;

[0022] Figure 5 In a single-stage aerobic SBR reactor provided by the present invention Figure 3 A magnified detail of part A;

[0023] Figure 6 A schematic diagram of the operation mode of a single-stage aerobic SBR reactor provided by the present invention.

[0024] In the figure: 100, reaction dish; 101, water inlet assembly; 101a, water inlet trough; 101b, water inlet pipe; 101c, water pump; 102, sewage discharge assembly; 102a, fixing plate; 102b, motor; 102c, stirring shaft; 102d, sewage discharge pipe; 201, suspension plate; 201a, stirring positioning hole; 201b, sewage discharge positioning hole; 202, suspension trough assembly; 202a, water outlet trough 1; 202b, water outlet pipe; 202c, water outlet trough 2; 202d, weighted ball; 202e, positioning block; 202f, air bag; 202g, air inlet valve; 202h, connecting pipe. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0028] Furthermore, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0029] Example 1

[0030] Reference Figure 1-5 This embodiment provides a single-stage aerobic SBR reactor, including a reaction vessel 100. The bottom of the reaction vessel 100 is fixed on a horizontal platform or the ground. The reaction vessel 100 is a barrel structure with a sealed bottom and an open top.

[0031] Specifically, a water inlet assembly 101 is located on one side of the reaction vessel 100, and the water inlet assembly 101 is fixed on a horizontal platform or the ground. A sewage discharge assembly 102 is located on the other side of the reaction vessel 100, and the sewage discharge assembly 102 is also fixed on a horizontal platform or the ground. A suspension plate 201 is located in the middle of the reaction vessel 100, and the suspension plate 201 is placed inside the reaction vessel 100. A suspension tank assembly 202 is located above the inside of the reaction vessel 100, and the suspension tank assembly 202 is placed inside the reaction vessel 100.

[0032] Furthermore, the reaction vessel 100 is a hollow structure consisting of a bottom cone and a top cylinder, which is conducive to the aggregation of substances at the bottom of the reaction vessel 100 and also convenient for recycling the aggregates.

[0033] Preferably, the water inlet assembly 101 includes a water inlet tank 101a, which is a hollow cylindrical structure. The water inlet tank 101a is fixedly connected on a horizontal surface on one side of the reaction dish 100, and a water inlet pipe 101b is fixedly connected inside the water inlet tank 101a. One end of the water inlet pipe 101b away from the water inlet tank 101a is fixedly connected to the inside of the reaction dish 100. A water pump 101c is fixedly connected to the water inlet pipe 101b. The water pump 101c is used to transport the water inside the water inlet tank 101a to the inside of the reaction dish 100 through the water inlet pipe 101b.

[0034] First, the reaction vessel 100 and the water inlet tank 101a are placed and fixed, and then the water inlet of the water inlet pipe 100b is fixedly connected to the water inlet tank 101a, and then the water outlet of the water inlet pipe 100b is fixedly connected to the reaction vessel 100, and a water pump 101c is installed on the water inlet pipe 101b above the water inlet tank 101a, and the water to be treated is placed in the water inlet tank 101a, and then the water pump 101c is started, and the water to be treated can be transferred to the interior of the reaction vessel 100 through the water inlet pump 101c for reaction. When the water to be treated enters the interior of the reaction vessel 100, the suspension plate 201 floats synchronously with the rise of the water level in the reaction vessel 100.

[0035] Example 2

[0036] Reference Figure 1-5 , which is the second embodiment of the present invention, is based on the previous embodiment, and is different from the previous embodiment in that:

[0037] The sewage discharge assembly 102 includes a fixed plate 102a, which is usually a roof of a house or a panel with a certain bearing capacity, and is used to play a supporting and bearing role.

[0038] Specifically, the fixed plate 102a is fixedly connected to the top of the reaction vessel 100, the bottom of the fixed plate 102a is fixedly connected to a motor 102b, the output shaft end of the motor 102b is fixedly connected to a stirring shaft 102c, and starting the motor 102b can drive the stirring shaft 102c to rotate evenly, and a drain pipe 102d is fixedly connected inside the reaction vessel 100 and located on one side of the stirring shaft 102c, and the drain pipe 102d is used to cooperate in discharging materials at the bottom of the reaction vessel 100.

[0039] Furthermore, a spiral stirring blade is fixedly connected to the bottom of the stirring shaft 102c, which can stir the water to be treated more evenly and quickly. The bottom of the sewage pipe 102d fits the bottom shape of the reaction dish 100, so that the materials to be cleaned at the bottom of the reaction dish 100 can be better cleaned.

[0040] When the water inside the reaction vessel 100 begins to react, the inside of the reaction vessel 100 needs to be aerated, and the drain pipe 102d needs to be connected to an air pump and an aeration head needs to be installed to accelerate the reaction of the water inside the reaction vessel 100. Before the reaction, sludge needs to be discharged and added to the bottom of the reaction vessel 100, and a sludge pump needs to be connected to the end of the drain pipe 102d away from the reaction vessel 100. The sludge at the other end of the sludge pump is taken from an acclimated reaction vessel that has been acclimated and cultivated and has a stable operating state. The sludge is placed inside the reaction vessel 100 to react with the water to be treated in the reaction vessel 100. In order to speed up the reaction and make the reaction more efficient, the motor 102b is turned on to drive the stirring shaft 102c to stir the inside of the reaction vessel 100 to accelerate the aeration process.

[0041] By turning on the motor 102b, the stirring shaft 102c rotates synchronously with the motor 102b. At this time, the stirring shaft 102c stirs the water and sludge inside the reaction dish 100. Since a suspension plate 201 floats above the water, the suspension plate 201 prevents the sludge from splashing during the rotation, and the water from splashing randomly.

[0042] Example 3

[0043] Reference Figure 1-6 , which is the third embodiment of the present invention, is based on the previous embodiment, and is different from the previous embodiment in that:

[0044] The suspension tank assembly 202 includes a water outlet tank 1 202 a , the bottom of which is fixed on a horizontal platform or the ground at the other side of the reaction vessel 100 .

[0045] Specifically, the interior of the water outlet trough 1 202a is fixedly connected with a water outlet pipe 202b, and the bottom of the water outlet pipe 202b away from the water outlet trough 1 202a is provided with a water outlet trough 202c. The water outlet trough 202c floats on the surface of the water inside the reaction vessel 100, and the interior of the water outlet trough 202c is fixedly connected with a plurality of weighted balls 202d. After the weighted balls 202d are placed inside the water outlet trough 202c, the top of the water outlet trough 202c will be slightly lower than the water surface, so that the interior of the water outlet trough 202c overflows with water, and the water outlet trough 202c is filled with water. c is fixedly connected with a positioning block 202e at the bottom center, a spherical groove is provided at the bottom of the positioning block 202e, an air bag 202f is fittedly connected to the bottom of the positioning block 202e, an air intake valve 202g is fixedly connected to the bottom of the air bag 202f, a connecting tube 202h is fixedly connected to the bottom of the air intake valve 202g, an end of the connecting tube 202h away from the air bag 202f is located on the outside of the reaction dish 100, and an air intake device is connected to the end of the connecting tube 202h away from the air bag 202f for air intake treatment of the air bag 202f.

[0046] Furthermore, the weighted balls 202d are evenly arranged inside the second water outlet trough 202c, and the water outlet pipe 202b is located above the weighted balls 202d, and the positioning block 202e and the air bag 202f are mutually engaged and snap-fitted.

[0047] Preferably, a stirring positioning hole 201a is opened in the center of the suspension plate 201, a sewage positioning hole 201b is opened at the top corner of the surface of the suspension plate 201, the stirring shaft 102c passes through the stirring positioning hole 201a on the suspension plate 201, and the stirring shaft 102c is rotatably connected to the suspension plate 201, and the sewage pipe 102d passes through the sewage positioning hole 201b on the suspension plate 201, and the sewage pipe 102d is also rotatably connected to the suspension plate 201.

[0048] When the reaction vessel 100 contains water to be treated, the staff injects air into the end of the connecting tube 202h away from the airbag 202f. The air enters the airbag 202f through the air inlet valve 202g. The airbag 202f is connected with the positioning block 202e. The injected air balances the buoyancy of the water below the airbag 202f and the weight of the water outlet tank 202a and the weight ball 202d above the airbag 202f. In this way, the water outlet tank 202a is maintained at a constant pressure. In terms of position, when the stirring shaft 102c rotates to drive the water inside the reaction dish 100 to move, the force generated by the movement causes the surface of the water to flip, and part of the water will flow into the water outlet trough 1 202a. Since the height of the water outlet trough 1 202a is higher than the height of the water outlet trough 202c, the water inside the water outlet trough 1 202a can be discharged to the inside of the water outlet trough 202c through the water outlet pipe 202b, so that the water outlet trough 1 202a and the counterweight ball 202d continue to maintain a relatively stable position.

[0049] The bottom of the suspension board 201 is provided with supporting legs of a certain height. When the water level inside the reaction vessel 100 gradually decreases, the height of the suspension board 201 also decreases. When the supporting legs of the suspension board 201 contact the bottom of the reaction vessel 100, the position of the suspension board 201 will not decrease.

[0050] This device adopts a single-stage aerobic phosphorus removal process. At this time, the microorganisms in the water of the reaction dish 100 are constantly in a cycle of rich external carbon source and lack of external carbon source. The end of the sewage pipe 102d away from the reaction dish 100 is connected to a discharge device rich in flocculent microorganisms, and the flocculent microorganisms are transported to the inside of the reaction dish 100 through the sewage pipe 102d. Then, an air pump is connected to the end of the sewage pipe 102d away from the reaction dish 100 and an aeration head is installed to aerate the inside of the reaction dish 100. Then, the staff starts the motor 102b to rotate the stirring shaft 102c at the bottom of the reaction dish 100. The stirring will cause the flocculent microorganisms to dominate and induce them to absorb excessive phosphorus. Then, after the reaction is completed, the density of these high-phosphorus sludges is greater than the density of water and will precipitate to the bottom of the reaction dish 100. The sewage pipe 102d is connected to the sludge pump to discharge these high-phosphorus sludges into the water body, completing the absorption and removal of phosphate in the sewage.

[0051] Single-stage aerobic SBR reaction usually has four stages: water inlet, aeration reaction, drainage and standing. The aeration reaction lasts for 3.5 hours, drainage lasts for 0.5 hours, standing lasts for 8 hours, and sludge is discharged after standing. The reaction vessel 100 is discharged once a day. The sludge retention time of a single reaction vessel 100 is 30 days each time. The reaction vessel 100 runs 2 cycles a day (each cycle is 12 hours).

[0052] After water is injected into the reaction vessel 100 through the water inlet pipe 101b and the water pump 101c, soil rich in microorganisms is then injected into the reaction vessel 100 through the sewage pipe 102d, and then the motor 102b is started to drive the stirring shaft 102c to rotate and stir. At this time, the water inside the reaction vessel 100 enters the initial stage of aeration, and the organic nutrients in the water are relatively sufficient. The microorganisms in the system decompose through the tricarboxylic acid cycle (TCA cycle), and use the external carbon source to provide energy and reducing power to convert short-chain fatty acids (VFA) into poly-β-hydroxyalkanoate (PHA) and store it in the body, so the COD concentration in the sewage decreases rapidly. The oxidative decomposition of the external carbon source in this process consumes a large amount of dissolved oxygen in the water body, so that the sewage presents a short anaerobic state even during the aeration process. In the subsequent nutrient deficiency stage, the external carbon source is completely decomposed, and the dissolved oxygen gradually returns to the aerobic state. The microorganisms decompose the internal polymer stored in the body to provide energy, and excessively absorb orthophosphate in the water to form polyphosphate particles in the body.

[0053] After the aeration reaction is completed, a water pump 101c is installed on the outlet pipe 202b, and then the air supply to the air bag 202f is stopped, so that the outlet tank 1 202a continues to settle. During this process, the water pump 101c is turned on to transfer the water gushing out of the water tank 1 202a to the outlet tank 2 202c through the outlet pipe 202b. When the outlet tank 1 202a is about to reach the lowest point, that is, the suspension plate 201 drops to the bottom of the reaction vessel 100 under the gravity of the outlet tank 1 202a and the counterweight ball 202d, the treated water in the reaction vessel 100 is pumped out.

[0054] Finally, the bottom of the reaction vessel 100 is precipitated, and after precipitation, the phosphorus-rich soil and other substances are discharged through the sewage pipe 102d, thereby achieving the purpose of removing phosphorus from wastewater.

[0055] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0056] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0057] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0058] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A single-stage aerobic SBR reactor, characterized in that: include, A reaction vessel (100), a water inlet assembly (101) located at one side of the reaction vessel (100), a sewage discharge assembly (102) located at the other side of the reaction vessel (100), a suspension plate (201) located in the middle of the reaction vessel (100), and a suspension tank assembly (202) located at the upper part of the reaction vessel (100).

2. The single-stage aerobic SBR reactor according to claim 1, characterized in that: The reaction vessel (100) is a hollow structure consisting of a bottom cone and a top cylinder.

3. The single-stage aerobic SBR reactor according to claim 2, characterized in that: The water inlet assembly (101) comprises a water inlet trough (101a), the water inlet trough (101a) is located at one side of the reaction vessel (100), a water inlet pipe (101b) is fixedly connected inside the water inlet trough (101a), one end of the water inlet pipe (101b) away from the water inlet trough (101a) is fixedly connected inside the reaction vessel (100), and a water pump (101c) is fixedly connected to the water inlet pipe (101b).

4. The single-stage aerobic SBR reactor according to any one of claim 3, characterized in that: The sewage discharge assembly (102) comprises a fixed plate (102a), the fixed plate (102a) is fixedly connected to the top of the reaction vessel (100), a motor (102b) is fixedly connected to the bottom of the fixed plate (102a), an output shaft end of the motor (102b) is fixedly connected to a stirring shaft (102c), and a sewage discharge pipe (102d) is fixedly connected inside the reaction vessel (100) and located on one side of the stirring shaft (102c).

5. The single-stage aerobic SBR reactor according to claim 4, characterized in that: The bottom of the stirring shaft (102c) is fixedly connected with a spiral stirring blade, and the bottom of the sewage discharge pipe (102d) fits the bottom shape of the reaction vessel (100).

6. The single-stage aerobic SBR reactor according to claim 5, characterized in that: The suspension plate (201) is located inside the reaction vessel (100), the cross-sectional area of ​​the suspension plate (201) is smaller than the upper cross-sectional area of ​​the reaction vessel (100), and the material density of the suspension plate (201) is smaller than the density of water.

7. The single-stage aerobic SBR reactor according to claim 6, characterized in that: A stirring positioning hole (201a) is provided in the middle of the suspension plate (201), and a sewage discharge positioning hole (201b) is provided at the top corner of the surface of the suspension plate (201).

8. The single-stage aerobic SBR reactor according to any one of claims 1 to 7, characterized in that: The suspension tank assembly (202) comprises a water outlet tank (202a), the interior of the water outlet tank (202a) being fixedly connected with a water outlet pipe (202b), a water outlet tank (202c) being arranged at the bottom of one end of the water outlet pipe (202b) away from the water outlet tank (202a), a plurality of weighted balls (202d) being fixedly connected to the interior of the water outlet tank (202c), a positioning block (202e) being fixedly connected to the bottom of the water outlet tank (202c), an air bag (202f) being fittedly connected below the positioning block (202e), an air intake valve (202g) being fixedly connected to the bottom of the air intake valve (202g), a connecting pipe (202h) being fixedly connected to the bottom of the air intake valve (202g), and an end of the connecting pipe (202h) away from the air bag (202f) being located outside the reaction vessel (100).

9. The single-stage aerobic SBR reactor according to claim 8, characterized in that: The counterweight balls (202d) are evenly arranged inside the second water outlet groove (202c), and the water outlet pipe (202b) is located above the counterweight balls (202d), and the positioning block (202e) and the air bag (202f) are mutually engaged and clamped.

10. The single-stage aerobic SBR reactor according to claim 7, characterized in that: The stirring shaft (102c) passes through the stirring positioning hole (201a) on the suspension plate (201), and the sewage discharge pipe (102d) passes through the sewage discharge positioning hole (201b) on the suspension plate (201).

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