Biological synergistic aerobic sludge treatment equipment

Abstract

The utility model relates to the technical field of sewage treatment, in particular to biological synergistic aerobic sludge treatment equipment which comprises a blending tank, an anaerobic tank, an anoxic tank, an aerobic tank, a sedimentation tank, a mud tank, a recovery tower, a spray tower and a disinfection tank. The blending tank is communicated with the anaerobic tank, the anaerobic tank is communicated with the anoxic tank, the anoxic tank is communicated with the aerobic tank, the aerobic tank is communicated with the sedimentation tank, a clear liquid output pipe is arranged at the upper end of the sedimentation tank, the lower end is communicated with the mud tank, and the clear liquid output pipe is communicated with the disinfection tank; the upper ends of the blending tank, the anaerobic tank, the anoxic tank and the aerobic tank are jointly communicated with the recovery tower; the output end of the recovery tower is communicated with the lower input end of the spray tower; stirring devices are arranged in the blending tank, the anaerobic tank and the disinfection tank; and aeration devices are arranged at the bottom ends in the anoxic tank and the aerobic tank. After pretreatment, blending, anaerobic treatment, anoxic treatment, aerobic treatment and disinfection treatment, most suspended matters, organic matters, germs and the like in the wastewater are eliminated, and the purification effect is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the sewage treatment technical field, especially to a sludge treatment equipment under biological synergistic oxygenation. BACKGROUND

[0002] With the rapid development of national economy, the rapid growth of population and the acceleration of industrialization and urbanization, a large amount of industrial wastewater containing nitrogen and phosphorus, domestic sewage and the like are discharged into rivers, lakes and seas without treatment or substandard treatment, resulting in pollution of many rivers to varying degrees and eutrophication. This can cause a large number of aquatic organisms to die, affect the regional ecological balance, and further affect the health of people in the region. Therefore, more attention needs to be paid to wastewater treatment.

[0003] The principle of wastewater treatment is to separate or decompose and convert pollutants in wastewater into harmless stable substances, so as to purify the wastewater. Wastewater treatment is generally carried out by combining physical, chemical and biological methods: in the pretreatment stage, physical treatment methods such as grating, filtering, oil separation tank and the like are used to remove solid floating matter and floating oil in wastewater, reduce the degree of corruption of wastewater, and the BOD removal rate is 25-40%. Then, biological or chemical methods are used to remove degradable organic matter and part of colloidal pollutants in wastewater, and the BOD removal rate in wastewater can reach 80-90%. The wastewater after this treatment can meet the agricultural irrigation standard and the wastewater discharge standard.

[0004] However, the water after the treatment still contains a certain amount of suspended matter, dissolved inorganic matter and the like, and contains viruses and bacteria, so it cannot meet the higher discharge standard.

[0005] Therefore, the present application provides a sludge treatment equipment under biological synergistic oxygenation to deeply treat wastewater and improve the wastewater treatment effect.

[0006] CONTENT OF THE APPLICATION

[0007] The present application aims to solve the problems in the prior art and provides a sludge treatment equipment under biological synergistic oxygenation.

[0008] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0009] A sludge treatment equipment under biological synergistic oxygenation, comprising a conditioning tank for adjusting water quality, an anaerobic tank, an anoxic tank, an aerobic tank, a sedimentation tank, a sludge tank, a recovery tower, a spray tower and a disinfection tank.

[0010] The upper end output of the adjusting tank is communicated with the lower end input of the anaerobic tank, the upper end output of the anaerobic tank is communicated with the lower end input of the anoxic tank, the upper end output of the anoxic tank is communicated with the lower end input of the aerobic tank, the upper end output of the aerobic tank is communicated with the upper end port of the sedimentation tank, the upper end of the sedimentation tank is provided with a clear liquid output pipe, the lower end output is communicated with the sludge tank, the side of the sedimentation tank is provided with a material tank, the material tank stores flocculating agent, and the clear liquid output pipe is communicated with the input end of the disinfection tank.

[0011] The upper ends of the adjusting tank, the anaerobic tank, the anoxic tank and the aerobic tank are jointly communicated with a mother pipe I, the mother pipe I is communicated with the input end of the recovery tower, and the output end of the recovery tower is communicated with the lower end input of the spray tower.

[0012] The adjusting tank, the anaerobic tank and the disinfection tank are all provided with a stirring device, and the bottom end of the anoxic tank and the aerobic tank is provided with an aeration device.

[0013] Preferably, the stirring device comprises a motor, a rotating shaft is installed on the output shaft of the motor, a support frame is fixed to the end of the rotating shaft, the diameter of the support frame is smaller than the inner diameter of the adjusting tank and the anaerobic tank, and a plurality of spiral plates are arranged in an annular array on the support frame.

[0014] Preferably, an opening is arranged between the adjacent two spiral plates on the support frame.

[0015] Preferably, the upper end of the sludge tank is communicated with a clear liquid reflux pipe, and the clear liquid reflux pipe is communicated with the input end of the adjusting tank.

[0016] Preferably, a partition plate is arranged in the sedimentation tank, the upper end of the partition plate is flush with the upper end port of the sedimentation tank, the lower end of the partition plate is spaced apart from the bottom end of the sedimentation tank, and the output end of the aerobic tank and the clear liquid output pipe are located on the two sides of the partition plate, respectively.

[0017] Preferably, a plurality of floating balls are uniformly arranged in the space in the sedimentation tank communicated with the clear liquid output pipe through a pull rope, and the floating balls are located between the upper end and the lower end of the partition plate.

[0018] Preferably, the anoxic tank and the aerobic tank are each divided into a plurality of interpenetrating separate cavities, and each separate cavity is filled with MBRR filler.

[0019] Compared with the prior art, the sludge treatment equipment under the biological synergistic aerobic process has the following beneficial effects:

[0020] 1、In the pretreatment stage, first use physical treatment method to remove solid floating matter, floating oil in wastewater, reduce the degree of corruption of wastewater. Pretreated sewage into the deployment pool to adjust water quality, and then with the appropriate amount of input anaerobic tank. Large molecules in wastewater are converted into small molecules in the anaerobic tank, and release energy to produce methane and other gases. The wastewater in the anaerobic tank enters the anoxic tank, removing nitrogen pollutants such as nitrate nitrogen in the wastewater. The wastewater in the anoxic tank enters the aerobic tank, and through adsorption, oxidation and other biochemical processes, the organic matter is degraded. The treated water is input into the sedimentation tank, and the sludge is coagulated and settled. The settled sludge enters the sludge tank for storage, and then can be subjected to the next process, such as drying to make mud cake, etc., so that the slurry is fully recycled. The clear liquid at the top of the sedimentation tank is input into the disinfection tank for disinfection treatment to remove residual bacteria and viruses in the water. After pretreatment, deployment, anaerobic, anoxic, aerobic and disinfection, most of the suspended solids, organic matter and bacteria in the wastewater are eliminated, and the purification effect is greatly improved.

[0021] 2、The waste gas generated in the water treatment process first undergoes a recovery tower, in which useful gases such as methane are recovered. The remaining part undergoes a spray tower for purification and then is discharged to the outside. The by-products of water treatment are reasonably recycled and utilized while being purified, improving resource utilization.

[0022] Other advantages, objects, and features of the present application will be apparent to those skilled in the art in view of the following detailed description and drawings. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application, as claimed. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The wastewater treatment system of the present application is shown in the figure.

[0024] Figure 2 The stirring device in the deployment tank and anaerobic tank of the present application is shown in the figure.

[0025] Figure 3 The cross-sectional view of the anoxic tank and aerobic tank of the present application is shown in the figure.

[0026] Figure 4 The cross-sectional view of the sedimentation tank of the present application is shown in the figure.

[0027] In the figure: 1, deployment tank; 2, anaerobic tank; 3, anoxic tank; 4, aerobic tank; 5, sedimentation tank; 6, sludge tank; 7, disinfection tank; 8, recovery tower; 9, spray tower; 10, aeration device; 11, stirring device; 12, clear liquid return pipe; 13, partition; 14, float ball; 1101, motor; 1102, shaft; 1103, support; 1104, spiral plate. DETAILED DESCRIPTION

[0028] The drawings used in the description of the embodiments of the present application are only intended to illustrate the principles of the present application and should not be considered as limiting the scope of the present application. Figures 1-4 To clearly and completely describe the technical solutions of the embodiments of the present application, it should be apparent that the described embodiments are only a part of the embodiments of the present application, not all the embodiments.

[0029] In order to solve the problems in the prior art, the present embodiment provides a sludge treatment equipment under biological synergistic aerobic conditions, which comprises a conditioning tank 1 for adjusting water quality, an anaerobic tank 2, an anoxic tank 3, an aerobic tank 4, a settling tank 5, a sludge tank 6, a recovery tower 8, a spraying tower 9, and a disinfection tank 7.

[0030] The upper end output end of the conditioning tank 1 is in communication with the lower end input end of the anaerobic tank 2, the upper end output end of the anaerobic tank 2 is in communication with the lower end input end of the anoxic tank 3, the upper end output end of the anoxic tank 3 is in communication with the lower end input end of the aerobic tank 4, the upper end output end of the aerobic tank 4 is in communication with the upper end port of the settling tank 5, the upper end of the settling tank 5 is provided with a clear liquid output pipe, the lower end output end is in communication with the sludge tank 6, and a material tank is arranged on the side of the settling tank 5, the material tank stores a flocculating agent, and the clear liquid output pipe is in communication with the input end of the disinfection tank 7.

[0031] The upper ends of the conditioning tank 1, the anaerobic tank 2, the anoxic tank 3, and the aerobic tank 4 are jointly communicated with a mother pipe I, the mother pipe I is in communication with the input end of the recovery tower 8, and the output end of the recovery tower 8 is in communication with the lower end input end of the spraying tower 9.

[0032] The conditioning tank 1, the anaerobic tank 2, and the disinfection tank 7 are each provided with a stirring device 11, and the bottom end of the anoxic tank 3 and the aerobic tank 4 is provided with an aeration device 10.

[0033] Principle details of the present embodiment:

[0034] A sludge treatment equipment under biological synergistic aerobic conditions comprises:

[0035] The conditioning tank 1 adjusts the water quality of wastewater, such as adjusting the pH value, stores water, and adjusts the water inflow to the next level of treatment equipment, so that the overall water supply of the system is matched with the wastewater purification capacity.

[0036] The anaerobic tank 2 contains a variety of and a large number of anaerobic microorganisms and a small part of facultative microorganisms (facultative microorganisms exist in anaerobic environment, and these facultative anaerobic bacteria can protect strict anaerobic bacteria such as methanogens from damage and inhibition by oxygen). The reaction process is as follows:

[0037] (1) Under the joint action of a large number of anaerobic microorganisms, high molecular organic matter in wastewater is decomposed into small molecules by bacterial extracellular enzymes. For example, proteins are hydrolyzed by protease into short peptides and amino acids. That is, complex organic compounds are decomposed and converted into simple and stable compounds, while energy is released. Most of the energy appears in the form of methane.

[0038] (2) The small molecules are then converted into simpler compounds inside the cells of fermentative bacteria (i.e., acidogenic bacteria) and excreted outside the cells. The main products of this stage are volatile fatty acids, alcohols, lactic acid, carbon dioxide, hydrogen, etc. (the composition of the products depends on the anaerobic degradation conditions, the substrate type, and the microbial population involved in the acidification). At the same time, the acidogenic bacteria also use part of the substances to synthesize new cell material, thus producing more residual sludge during the anaerobic treatment of acidified wastewater.

[0039] (3) The products of the previous stage are further converted into acetic acid, hydrogen, carbonic acid, and new cell material under the action of hydrogen-producing acetogenic bacteria.

[0040] (4) The process of converting acetic acid, acetate, carbon dioxide, and hydrogen into methane is carried out by two physiologically different groups of methanogenic bacteria. One group converts hydrogen and carbon dioxide into methane, and the other group produces methane by decarboxylation from acetic acid or acetate.

[0041] Anoxic tank 3: There are a large number of anoxic and facultative microorganisms of different populations inside. Under anoxic conditions, there is no dissolved oxygen (DO) in the anoxic tank 3, but there are oxidizing agents such as nitrate nitrogen (e.g., nitrate). In the anoxic environment, microorganisms such as denitrifying bacteria mainly reduce nitrate nitrogen to nitrogen or nitrite through the denitrification process. This process helps to remove nitrogen pollutants such as nitrate nitrogen in wastewater, and some anoxic bacteria can also degrade organic matter to remove BOD in wastewater. In addition, anoxia can also promote the hydrolysis reaction and improve the biodegradability of wastewater.

[0042] Oxygen tank 4: There are a large number of aerobic microorganisms and part of facultative microorganisms inside. Under the condition of free oxygen, aerobic microorganisms degrade organic matter to make it harmless and stable. And microorganisms can also use the organic pollutants present in wastewater as a source of nutrition for aerobic metabolism. The reaction process is as follows:

[0043] (1) Adsorption stage: The pollutants in the wastewater are adsorbed and adhered by the flocculation body formed by the microorganisms during the contact process with the activated sludge microorganisms.

[0044] (2) Oxidation stage: Under aerobic conditions, microorganisms use part of the adsorbed organic matter into the body as nutrition to synthesize cell material, and another part of the organic matter is metabolized and releases energy.

[0045] Sedimentation tank 5: The water after biochemical treatment enters the sedimentation tank 5, and the water is purified by standing or adding flocculating agent to form flocculation body and separating it from the water by gravity sedimentation.

[0046] Sludge tank 6: The sludge sinking in the sedimentation tank 5 is discharged into the sludge tank 6 for compression dewatering.

[0047] Recovery tower 8: internally provided with multiple chambers to recover recyclable gases, such as methane.

[0048] Spray tower 9: to purify the exhaust gas generated in the treatment of waste water.

[0049] Disinfection tank 7: to kill harmful pathogenic microorganisms in the water after secondary biochemical treatment by adding disinfectants such as liquid chlorine, ozone, sodium chlorate, chlorine dioxide, ultraviolet rays, etc.

[0050] The upper end output of the deployment tank 1 is communicated with the lower end input of the anaerobic tank 2 through the sewage pump 1, the upper end output of the anaerobic tank 2 is communicated with the lower end input of the anoxic tank 3 through the sewage pump 2, the upper end output of the anoxic tank 3 is communicated with the lower end input of the aerobic tank 4 through the sewage pump 3, the upper end output of the aerobic tank 4 is communicated with the upper end port of the sedimentation tank 5 through the sewage pump 4, the upper end of the sedimentation tank 5 is provided with a clear liquid output pipe, the lower end output of the sedimentation tank 5 is communicated with the sludge tank 6 through the sewage pump 5, and the clear liquid output pipe is communicated with the input end of the disinfection tank 7 through the water pump.

[0051] The side of the sedimentation tank 5 is provided with a material tank, and the material tank stores flocculating agent. The flocculating agent promotes the coagulation and sedimentation of sludge and suspended solids, thereby improving the purification effect.

[0052] Operation process:

[0053] In the pretreatment stage, physical treatment methods such as grids, screens, and oil separation tanks are used to remove solid floating matter and floating oil in the wastewater, thereby reducing the degree of corruption of the wastewater. The pretreated wastewater enters the deployment tank 1, is configured in the deployment tank 1, and the water quality is adjusted, and then an appropriate amount of wastewater is input into the anaerobic tank 2. Large molecules in the wastewater are converted into small molecule substances in the anaerobic tank 2, and energy is released to produce gases such as methane. The wastewater in the anaerobic tank 2 enters the anoxic tank 3, and the nitrogen pollutants such as nitrate nitrogen in the wastewater are removed. The wastewater in the anoxic tank 3 enters the aerobic tank 4, and through biochemical processes such as adsorption and oxidation, the organic matter is degraded to be harmless and stable. The biochemical treated water is input into the sedimentation tank 5, and the water is left to stand in the sedimentation tank 5. At the same time, flocculating agent is added to the sedimentation tank 5 through the material tank to promote the coagulation and sedimentation of sludge. The settled sludge enters the sludge tank 6 for storage, and then the next process such as drying to make mud cakes can be carried out, so that the sludge is fully recycled. The clear liquid at the upper end of the sedimentation tank 5 is input into the disinfection tank 7 for disinfection treatment to remove residual bacteria and viruses in the water. After the above-mentioned pretreatment, deployment, anaerobic treatment, anoxic treatment, aerobic treatment, and disinfection treatment, most of the suspended solids, organic matter, and bacteria in the wastewater are eliminated, and the purification effect is greatly improved.

[0054] In order to reasonably utilize the waste gas generated in the water treatment process, the upper ends of the adjusting tank 1, the anaerobic tank 2, the anoxic tank 3 and the aerobic tank 4 are communicated with a mother pipe I, and the mother pipe I is communicated with the input end of the recovery tower 8. The waste gas first passes through the recovery tower 8, and the useful gas such as methane in the waste gas is recovered and treated by the recovery tower 8. The output end of the recovery tower 8 is communicated with the input end of the lower end of the spray tower 9, and the remaining part of the waste gas is purified by the spray tower 9 after recovery, and then is discharged to the outside. The by-products of the water treatment can be reasonably recycled and utilized while being purified, and the resource utilization rate is improved.

[0055] Because the wastewater contains a large amount of sludge and suspended solids, when passing through the adjusting tank 1, the anaerobic tank 2, the anoxic tank 3 and the aerobic tank 4, the suspended solids are easily settled and retained in these areas, which not only affects the wastewater purification effect, but also affects the normal operation of these equipment after a long time of operation. Therefore, some equipment needs to be set to prevent the suspended solids from settling in this process. Therefore, the adjusting tank 1 and the anaerobic tank 2 are both provided with a stirring device 11, and the bottom end of the anoxic tank 3 and the aerobic tank 4 is provided with an aeration device 10. The reason why the adjusting tank 1, the anaerobic tank 2, the anoxic tank 3 and the aerobic tank 4 are provided with different devices is that the microorganisms in the anoxic tank 3 and the aerobic tank 4 need oxygen to survive and degrade organic matter, so the aeration pipe of the aeration device 10 is arranged at the bottom end of the anoxic tank 3 and the aerobic tank 4, and the fine bubbles formed by aeration not only provide oxygen for the microorganisms to provide living conditions, but also promote the suspended solids to float. The adjusting tank 1 needs to adjust the wastewater, and various reagents may be added, and the stirring device 11 can ensure the full mixing of the reagents and the wastewater. The anaerobic microorganisms in the anaerobic tank do not need oxygen, and the aeration device cannot supply the cheapest and most convenient air, and the gas needs to be changed according to different bacterial flora, which not only has high cost, but also is troublesome. Therefore, the stirring device 11 is set, which can not only prevent settlement, but also does not need to consider aeration problems, and is more direct and convenient.

[0056] In a further embodiment of the present scheme, in the present embodiment, a specific structure of the stirring device 11 is provided: the stirring device 11 comprises a motor 1101, and the motor 1101 is fixed at the bottom end of the adjusting tank and the anaerobic tank 2 respectively. A rotating shaft 1102 is installed on the output shaft of the motor 1101, and a support frame 1103 is fixed at the end of the rotating shaft 1102. The caliber of the support frame 1103 is smaller than the inner diameter of the adjusting tank 1 and the anaerobic tank 2, and a plurality of spiral plates 1104 are arranged in an annular array on the support frame 1103. The motor 1101 drives the support frame 1103 to rotate through the rotating shaft 1102, and then drives the plurality of spiral plates 1104 to rotate. The wastewater in the tank is stirred by the spiral plates 1104, the wastewater is turbulent, and the suspended solids will not easily settle; and the spiral plates 1104 ascend spirally, and in the stirring process, they can also promote the suspended solids to float and move to the output end, which can not only improve the stirring effect, but also avoid the suspended solids from being suspended and retained in the tank.

[0057] In a further embodiment of the present application, the support frame 1103 is provided with an opening between any two adjacent spiral plates 1104. The opening reduces the outer leakage area of the support frame 1103, thereby reducing the resistance of the support frame 1103 to the floating of the wastewater, and also reducing the amount of dirt and other impurities adhered to the bottom end of the support frame 1103.

[0058] In a further embodiment of the present application, the sludge tank 6 is provided with a clear liquid return pipe 12 at the upper end, and the clear liquid return pipe 12 is connected to the input end of the distribution tank 1 through a return pump. The remaining wastewater in the sludge tank 6 is transported into the distribution tank 1 again for recycling treatment, thereby avoiding the residual untreated wastewater.

[0059] In a further embodiment of the present application, in order to avoid the wastewater from the biochemical treatment tank being input into the sedimentation tank 5, causing the liquid surface of the sedimentation tank 5 to float and the sediment to suspend, thereby affecting the sedimentation effect, and to prevent the water that has not been settled from being directly discharged through the clear liquid output pipe, in the present embodiment, the sedimentation tank 5 is provided with a partition plate 13, the upper end of the partition plate 13 is flush with the upper end of the sedimentation tank 5, and the lower end of the partition plate 13 is spaced apart from the bottom end of the sedimentation tank 5, and the output end of the aerobic tank 4 and the clear liquid output pipe are located on the two sides of the partition plate 13, respectively. In this way, the wastewater after biochemical treatment is input into the sedimentation tank 5 and is blocked by the partition plate 13, so as not to flow into the range of the clear liquid output pipe, thereby avoiding the possibility of discharging the water that has not been settled. At the same time, the presence of the partition plate 13 can also alleviate the shock and floating caused by the water entering the sedimentation tank 5 at the clear liquid output pipe.

[0060] In a further embodiment of the present application, a plurality of floating balls 14 are evenly distributed in the space in the sedimentation tank 5 through a pull rope, and the floating balls 14 are located between the upper end and the lower end of the partition plate 13. The floating balls 14 press the clear liquid at the clear liquid output pipe, further alleviate the shock and floating caused by the water entering the sedimentation tank 5, and also reduce the floating of the suspended matter.

[0061] In a further embodiment of the present application, the anoxic tank 3 and the aerobic tank 4 are each divided into a plurality of interconnected compartments, and each compartment is filled with MBRR filler. Anaerobic bacteria, facultative bacteria, and aerobic bacteria exist on the MBRR filler in the anaerobic tank 2, the anoxic tank 3, and the aerobic tank 4, respectively, thereby providing a film-forming and living bed for the bacterial community. The anoxic tank 3 and the aerobic tank 4 are each divided into a plurality of interconnected compartments, so that the bacterial community is stratified, and the wastewater passes through layer by layer, so that the wastewater and the bacterial community are more fully contacted.

[0062] The above description is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can make equivalent replacements or changes to the technical solution and the application concept of the present application within the technical scope disclosed by the present application, and all of them should be covered within the protection scope of the present application.

[0063] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0064] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A sludge treatment device under biologically enhanced aerobic conditions, characterized in that, It includes a water quality adjustment tank (1), an anaerobic tank (2), an anoxic tank (3), an aerobic tank (4), a sedimentation tank (5), a mud tank (6), a recovery tower (8), a spray tower (9), and a disinfection tank (7). The upper output end of the mixing tank (1) is connected to the lower input end of the anaerobic tank (2), the upper output end of the anaerobic tank (2) is connected to the lower input end of the anoxic tank (3), the upper output end of the anoxic tank (3) is connected to the lower input end of the aerobic tank (4), the upper output end of the aerobic tank (4) is connected to the upper port of the sedimentation tank (5), the upper end of the sedimentation tank (5) is provided with a clear liquid output pipe, the lower output end is connected to the mud tank (6), the sedimentation tank (5) is provided with a material tank on the side, the material tank stores flocculant, and the clear liquid output pipe is connected to the input end of the disinfection tank (7); The upper ends of the mixing tank (), anaerobic tank (2), anoxic tank (3), and aerobic tank (4) are connected by a main pipe. The main pipe is connected to the input end of the recovery tower (8), and the output end of the recovery tower (8) is connected to the lower input end of the spray tower (9). The mixing tank (1), anaerobic tank (2), and disinfection tank (7) are all equipped with stirring devices (11), and the bottom of the anoxic tank (3) and aerobic tank (4) are equipped with aeration devices (10).

2. The sludge treatment equipment under biologically enhanced aerobic conditions according to claim 1, characterized in that, The stirring device (11) includes a motor (1101), a rotating shaft (1102) is installed on the output shaft of the motor (1101), and a support (1103) is fixed at the end of the rotating shaft (1102). The diameter of the support (1103) is smaller than the inner diameter of the mixing tank (1) and the anaerobic tank (2). Multiple spiral plates (1104) are arranged in a ring on the support (1103).

3. The sludge treatment equipment under biologically enhanced aerobic conditions according to claim 2, characterized in that, The support frame (1103) has notches between two adjacent spiral plates (1104).

4. The sludge treatment equipment under biologically enhanced aerobic conditions according to claim 1, characterized in that, The upper port of the mud tank (6) is connected to a clear liquid return pipe (12), which is connected to the input end of the mixing tank (1).

5. The sludge treatment equipment under biologically enhanced aerobic conditions according to claim 1, characterized in that, The sedimentation tank (5) is equipped with a partition (13). The upper end of the partition (13) is level with the upper port of the sedimentation tank (5), and the lower end is separated from the bottom of the sedimentation tank (5). The connection between the output end of the aerobic tank (4) and the sedimentation tank (5) and the clear liquid output pipe are located on both sides of the partition (13).

6. The sludge treatment equipment under bio-enhanced aerobic conditions according to claim 5, characterized in that, The sedimentation tank (5) is connected to the clear liquid output pipe and has several floats (14) evenly distributed in series by a pull rope. The floats (14) are located between the upper and lower ends of the partition (13).

7. The sludge treatment equipment under biologically enhanced aerobic conditions according to claim 1, characterized in that, The anoxic pool (3) and the aerobic pool (4) are both divided into multiple interconnected cavities, and each cavity is filled with MBRR packing material.

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