Integrated sewage treatment equipment

Abstract

The integrated sewage treatment equipment comprises a box body, and an anaerobic tank, an anoxic tank, an aerobic tank and a sedimentation tank are sequentially arranged in the box body; a first hydraulic circulation mechanism and a first microbial carrier mechanism are arranged in the anaerobic tank, first microorganisms are arranged in the anaerobic tank, and the anaerobic tank is not communicated with the outside during operation; a second hydraulic circulation mechanism, a second microbial carrier mechanism and an oxygenation mechanism are arranged in the aerobic tank, and second microorganisms are arranged in the aerobic tank; a first stirring mechanism is arranged in the anoxic tank, a nitrification liquid backflow mechanism is arranged between the anoxic tank and the aerobic tank, and third microorganisms are arranged in the anoxic tank; a second stirring mechanism is arranged in the sedimentation tank, an overflow mechanism is arranged between the sedimentation tank and the aerobic tank, and an activated sludge backflow mechanism is arranged between the sedimentation tank and the anaerobic tank. Methane in gas is efficiently decomposed, methane generation is reduced, and environmental pressure is reduced; meanwhile, zero discharge of sludge is realized, the treatment performance is stable and reliable, and the service life is long.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and particularly to an integrated sewage treatment device. Background Art

[0002] The existing sewage treatment equipment has the following problems:

[0003] 1. During the wastewater treatment process, the gases generated are treated with organized exhaust gas for the odorous gases before being discharged, and most of the gases with light odor and no recycling value are discharged without organization;

[0004] Especially the methane-based gas generated in the anaerobic section (the greenhouse effect of methane is 20 - 30 times that of carbon dioxide); if the amount of these gases is large, they can be collected for energy recycling, but for the gases generated from low-concentration or dispersed sewage with low gas volume, they are directly discharged into the atmospheric environment, thus increasing the greenhouse effect of the environment;

[0005] 2. The remaining activated sludge is inevitably generated after wastewater treatment. Usually, a large amount of it is handed over to other qualified units for secondary treatment or resource utilization, and a small amount can be land-consumed. For some dispersed sewage sites, the remaining sludge becomes waste and causes secondary pollution to the environment.

[0006] Therefore, in order to solve the above problems, it is necessary to develop an integrated sewage treatment device to efficiently decompose methane in the gas, reduce the generation of methane, and reduce environmental pressure; at the same time, achieve zero sludge discharge by endogenous consumption of sludge, with stable and reliable treatment performance and long service life. Summary of the Invention

[0007] To solve the above problems, the technical solutions adopted by the present invention are as follows:

[0008] An integrated sewage treatment device, characterized in that it includes a box body, and an anaerobic tank, an anoxic tank, an aerobic tank and a sedimentation tank are sequentially arranged in the box body in the direction of sewage treatment flow. The anaerobic tank, anoxic tank, aerobic tank and sedimentation tank are structures with openings at the upper part and continuously closed around the perimeter and at the bottom;

[0009] A first hydraulic circulation mechanism and a first microbial carrier mechanism are arranged in the anaerobic tank. The bottom of the anaerobic tank is connected to the anoxic tank. A first microorganism is arranged in the anaerobic tank, and the anaerobic tank does not communicate with the outside during operation;

[0010] The first microorganism grows and iterates in the anaerobic tank by attaching to the first microbial carrier mechanism. The first microorganism includes methanotrophic bacteria and anaerobic bacteria;

[0011] A second hydraulic circulation mechanism, a second microbial carrier mechanism and an oxygenation mechanism are arranged in the aerobic tank. A second microorganism is arranged in the aerobic tank;

[0012] The second microorganism attaches and grows and iterates in the aerobic tank through the second microorganism carrier mechanism. The second microorganism includes nitrifying bacteria and nitrite bacteria;

[0013] Both the first hydraulic circulation mechanism and the second hydraulic circulation mechanism include an inner sealing plate, a lift pump, a gas guide pipe, and a plurality of diversion pipes;

[0014] The inner sealing plate divides the cavities of the anaerobic tank and the aerobic tank into an upper cavity and a lower cavity. An exhaust hole is opened on the inner sealing plate, and a gas guide pipe is arranged on the exhaust hole;

[0015] The lift pump is located in the lower cavity. The lift pump is connected to the middle of the inner sealing plate and is used to lift the sewage in the lower cavity to the upper cavity;

[0016] A plurality of the diversion pipes are distributed around the outside of the lift pump. One end of the diversion pipe is located in the upper cavity and is lower than the gas guide pipe, and the other end penetrates downward through the inner sealing plate and extends above the bottom of the tank, so that the sewage in the upper cavity flows into the bottom of the lower cavity by gravity;

[0017] A first stirring mechanism is arranged in the anoxic tank. A nitrification liquid reflux mechanism is arranged between the anoxic tank and the aerobic tank. A third microorganism is arranged in the anoxic tank. The third microorganism includes denitrifying bacteria;

[0018] A second stirring mechanism is arranged in the sedimentation tank. An overflow mechanism is arranged between the sedimentation tank and the aerobic tank. An activated sludge reflux mechanism is arranged between the sedimentation tank and the anaerobic tank.

[0019] Preferably, both the first microorganism carrier mechanism and the second microorganism carrier mechanism include a plurality of microorganism carrier components, and the microorganism carrier components are detachably arranged in the lower cavity of the anaerobic tank or the aerobic tank through connecting pieces.

[0020] Preferably, the microorganism carrier component includes brackets arranged opposite to each other up and down, and a plurality of microorganism filler ropes with both ends respectively connected to the brackets. The brackets are detachably connected to the lower cavity of the anaerobic tank or the aerobic tank through connecting pieces.

[0021] Preferably, both the first stirring mechanism and the second stirring mechanism include a stirring shaft, a stirring motor, and stirring blades. One end of the stirring shaft extends outside the anoxic tank or the sedimentation tank and is connected to the driving end of the stirring motor, and the other end is connected to the stirring blades;

[0022] The stirring motor is connected to the anoxic tank or the sedimentation tank;

[0023] The aerobic tank is communicated with the anoxic tank through the nitrification liquid reflux mechanism, and the aerobic tank is communicated with the sedimentation tank through the overflow mechanism.

[0024] Preferably, the nitrification liquid reflux mechanism includes a reflux pipe and a first downcomer;

[0025] The first downcomer is sleeved outside the stirring shaft of the first stirring mechanism. One end of the first downcomer is connected to the inner wall of the upper end of the anoxic tank through a flange, and the other end extends above the stirring paddle and is in an open shape;

[0026] The upper chamber of the aerobic tank is communicated with the first downcomer through a reflux pipe, and a first solenoid valve is arranged on the reflux pipe.

[0027] Preferably, the overflow mechanism includes an overflow pipe and a second downcomer;

[0028] The second downcomer is sleeved outside the stirring shaft of the second stirring mechanism. One end of the second downcomer is connected to the inner wall of the upper end of the sedimentation tank through a flange, and the other end extends above the stirring paddle and is in an open shape;

[0029] The upper chamber of the aerobic tank is communicated with the second downcomer through an overflow pipe, and a second solenoid valve is arranged on the overflow pipe.

[0030] Preferably, the oxygenation mechanism includes a low-pressure blower, an intake pipe and a membrane filament aeration disc, and the low-pressure blower is arranged outside the box body;

[0031] The intake end of the intake pipe is connected to the low-pressure blower, and the other end extends into the upper end of the draft tube and is connected to the membrane filament aeration disc respectively.

[0032] Preferably, the activated sludge reflux mechanism includes a submersible sewage pump and a sewage return pipe;

[0033] The submersible sewage pump is arranged at the bottom of the sedimentation tank. One end of the sewage return pipe is connected to the submersible sewage pump, and the other end is connected to the water inlet of the anaerobic tank; a third solenoid valve is arranged on the sewage return pipe.

[0034] Preferably, the draft tube, the lift pump and the air guide tube are all connected to the inner sealing plate through flanges. A support frame is arranged on the side of the inner sealing plate facing the lower chamber, and high-efficiency sedimentation honeycomb inclined tubes can be selectively installed on the support frame.

[0035] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0036] 1. The anaerobic tank operates in a closed manner. The generated methane is circulated to the inside of the water body through the water-gas mixture, and is decomposed by adding methanotrophic bacteria. The greenhouse effect of the final gas-phase product carbon dioxide is less than 1 / 20 of that of methane, realizing the cyclic decomposition of methane, reducing the generation of methane, and reducing the environmental pressure.

[0037] 2. All the sludge finally generated at the end of sewage treatment is refluxed to the front end for anaerobic dissolution and digestion, realizing zero sludge discharge.

[0038] 3. The sewage treatment performance is stable and reliable, and it has a long service life.

[0039] 4. The process formed by this sewage treatment equipment can be applied to large sewage treatment projects with infrastructure structures as the volume.

[0040] 5. Through the linkage control design of pumps and valves, the parameters of each process section are coordinately controllable, the process is simple, and it can adapt to a wide range of sewage water qualities. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic three-dimensional structure diagram of the present invention;

[0042] Figure 2 It is a top view of the present invention;

[0043] Figure 3 It is a front view of the present invention

[0044] Figure 4 is Figure 2 a schematic cross-sectional structure diagram of A-A in

[0045] Figure 5 is Figure 4 a schematic structure diagram with the microbial carrier mechanism hidden;

[0046] Figure 6 is Figure 2 a schematic cross-sectional structure diagram of B-B in (with the microbial carrier mechanism hidden);

[0047] Figure 7 is Figure 4 a schematic internal structure diagram of the anaerobic tank in

[0048] Figure 8 is Figure 3 a schematic cross-sectional structure diagram of C-C in

[0049] Wherein: the box body 1, the first hydraulic circulation mechanism 2, the first microbial carrier mechanism 3, the second hydraulic circulation mechanism 4, the second microbial carrier mechanism 5, the oxygenation mechanism 6, the first stirring mechanism 7, the nitrification liquid reflux mechanism 8, the second stirring mechanism 9, the overflow mechanism 10, the activated sludge reflux mechanism 20, the flange 30, the support frame 40, the anaerobic tank 11, the anoxic tank 12, the aerobic tank 13, the sedimentation tank 14, the sealing plate 21, the lift pump 22, the air guide pipe 23, the diversion pipe 24, the microbial carrier assembly 31, the connecting piece 32, the low-pressure blower 61, the air inlet pipe 62, the membrane filament aeration disc 63, the stirring shaft 71, the stirring paddle 72, the reflux pipe 81, the first lower water pipe 82, the first solenoid valve 83, the upper pool cavity 100, the lower pool cavity 200, the overflow pipe 101, the second lower water pipe 102, the second solenoid valve 103, the submersible sewage pump 201, the sewage return pipe 202, the third solenoid valve 203, the support 311, the microbial filler rope 312. Detailed implementation manners

[0050] For the convenience of understanding the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0051] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right", "up", "down", "front", "rear" and similar expressions used herein are only for the purpose of illustration.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used herein in the description of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0053] Next, with reference to the drawings and specific implementation manners, the present invention will be further described:

[0054] As Figures 1-8 shown, an integrated sewage treatment device includes a box body 1. Inside the box body 1, an anaerobic tank 11, an anoxic tank 12, an aerobic tank 13 and a sedimentation tank 14 are sequentially arranged in the direction of sewage flow. The anaerobic tank 11, the anoxic tank 12, the aerobic tank 13 and the sedimentation tank 14 are structures with openings at the top and continuously closed around the perimeter and at the bottom.

[0055] A first hydraulic circulation mechanism 2 and a first microbial carrier mechanism 3 are arranged in the anaerobic tank 11. The bottom of the anaerobic tank 11 is communicated with the anoxic tank 12. A first microorganism (not shown in the figure) is arranged in the anaerobic tank 11. When the anaerobic tank 11 operates, it is not communicated with the outside.

[0056] The first microorganism grows and iterates in the anaerobic tank 11 by attaching to the first microbial carrier mechanism 3. The first microorganism includes methanotrophic bacteria and anaerobic bacteria.

[0057] A second hydraulic circulation mechanism 4, a second microbial carrier mechanism 5 and an oxygenation mechanism 6 are arranged in the aerobic tank 13. A second microorganism (not shown in the figure) is arranged in the aerobic tank 13.

[0058] The second microorganism attaches to and grows and iterates in the aerobic tank 13 through the second microorganism carrier mechanism 5. The second microorganism includes nitrifying bacteria and nitrite bacteria;

[0059] Both the first hydraulic circulation mechanism 2 and the second hydraulic circulation mechanism 4 include an inner sealing plate 21, a lift pump 22, a gas guide pipe 23, and a plurality of diversion pipes 24;

[0060] The inner sealing plate 21 divides the cavities of the anaerobic tank 11 and the aerobic tank 13 into an upper cavity 100 and a lower cavity 200. An exhaust hole is provided on the inner sealing plate 21, and a gas guide pipe 23 is arranged on the exhaust hole;

[0061] The lift pump 22 is located in the lower cavity 200. The lift pump 22 is connected to the middle of the inner sealing plate 21. The lift pump 22 is used to lift the sewage in the lower cavity 200 to the upper cavity 100;

[0062] A plurality of the diversion pipes 24 are distributed around the outside of the lift pump 22. One end of the diversion pipe 24 is located in the upper cavity 100 and is lower than the gas guide pipe 23, and the other end penetrates downward through the inner sealing plate 21 and extends above the bottom of the tank. The diversion pipe 24 enables the sewage in the upper cavity 100 to flow into the bottom of the lower cavity 200 by gravity;

[0063] A first stirring mechanism 7 is arranged in the anoxic tank 12. A nitrification liquid reflux mechanism 8 is arranged between the anoxic tank 12 and the aerobic tank 13. A third microorganism (not shown in the figure) is arranged in the anoxic tank 12. The third microorganism includes denitrifying bacteria;

[0064] A second stirring mechanism 9 is arranged in the sedimentation tank 14. An overflow mechanism 10 is arranged between the sedimentation tank 14 and the aerobic tank 13. An activated sludge reflux mechanism 20 is arranged between the sedimentation tank 14 and the anaerobic tank 11.

[0065] In this embodiment, through the first hydraulic circulation mechanism 2 and the second hydraulic circulation mechanism 4, the following is set: First, the water bodies of the anaerobic tank 11 and the aerobic tank 13 are circulated up and down. The microorganisms put in and the newly entered sewage pollutants are quickly diluted and distributed into the water body due to the water body circulation, so that the sewage pollutants are quickly diffused and the microorganisms uniformly contact the sewage pollutants; Second, the negative pressure siphon formed circulates the gas generated anaerobically back into the water body of the anaerobic tank 11, and continuously brings the oxygen in the air into the water body of the aerobic tank 13, so that the sewage is fully and evenly mixed.

[0066] In the anaerobic stage of biological treatment: During operation, the anaerobic tank 11 is not connected to the outside. By adding the first type of microorganisms containing methanotrophs and anaerobic bacteria to the anaerobic tank 11, organic pollutants are anaerobically fermented to produce products such as water, methane, and carbon dioxide. Methanotrophs decompose methane into carbon dioxide and at the same time decompose refractory organic matter into easily degradable organic matter. Then the generated gas overflows concentratedly in the lower water body and is guided through the air duct 23 above the liquid level of the upper pool chamber 100. Then the gas in the upper pool chamber 100 is cycled back into the water body under the action of the first hydraulic circulation mechanism 2, so that methane in the gas is continuously cycled back into the water body to serve as a carbon source for methanotrophs to further decompose methane into carbon dioxide.

[0067] In the anoxic stage of biological treatment: By adding the third type of microorganisms containing denitrifying bacteria to the anoxic tank 12, since the bottoms of the anaerobic tank 11 and the anoxic tank 12 are connected, part of the gas generated in the anaerobic tank 11 overflows into the anoxic tank 12 along with the activated sludge and water flow. The remaining methane in the anoxic tank 12 is further oxidized by methanotrophs into methanol. Part of the generated methanol is supplied to denitrifying bacteria as a carbon source, and the rest is further oxidized to formaldehyde and finally until it is oxidized into the form of carbon dioxide. Finally, the gas discharged from the equipment is mostly carbon dioxide and almost has no methane component, achieving zero methane emissions.

[0068] In addition, through the setting of the first stirring mechanism 7, sludge sedimentation is prevented and a relatively high sludge content is maintained in the water body. Through the setting of the nitrification liquid reflux mechanism 8, at the same time, the nitrification liquid refluxed from the aerobic tank 13 is evenly diffused at the bottom of the tank under the action of the first stirring mechanism 7, and then the nitrification liquid is supplied to denitrifying bacteria as a carbon source to more thoroughly remove nitrogen pollutants in the sewage.

[0069] In the aerobic stage of biological treatment: By adding the second type of microorganisms containing nitrifying bacteria and nitrosifying bacteria to the aerobic tank 13, since there is a communication port at the middle-upper position between the anoxic tank 12 and the aerobic tank 13, the activated sludge and water flow after the denitrification reaction in the anoxic stage overflow into the aerobic tank 13. The second hydraulic circulation mechanism 4 is used to quickly diffuse the pollutants, and the microorganisms evenly contact the sewage pollutants. The oxygenation mechanism 6 generates oxygen-containing microbubbles in the upper pool chamber 100 of the aerobic tank 13. Under the action of the guide pipe 24 of the second hydraulic circulation mechanism 4, the oxygen-containing microbubbles are continuously introduced into the water body and fully mixed with the water body, so as to maintain the metabolic activity of aerobic microorganisms such as nitrifying bacteria in the water body and promote the nitrification reaction, thereby removing nitrogen pollutants in the water body.

[0070] After the sewage undergoes the above biochemical treatment, the organic pollutants are decomposed by microorganisms and then overflow to the sedimentation tank 14. The activated sludge is efficiently separated from the water and precipitated. The supernatant overflows smoothly through the effluent weir, is collected, and then discharged from the equipment treatment system. The precipitated activated sludge is all refluxed to the inlet of the anaerobic tank 11 through the activated sludge reflux mechanism 20 and mixed with the incoming water to enter the anaerobic tank 11. A large amount of activated sludge in the anaerobic tank 11 is lysed into organic matter and recycled for treatment. The activated sludge is endogenously digested, thus achieving zero discharge. During the process, the second stirring mechanism 9 is used to prevent sludge deposition.

[0071] In this embodiment, by respectively arranging microbial carrier mechanisms in the anaerobic tank 11 and the aerobic tank 13, it is ensured that there is a certain retention amount of bacteria in the water body, enabling the amount of methanotrophic bacteria and other bacteria to grow and iterate in a certain proportion, maintaining a relatively stable microecology. When the system is impacted by water quality fluctuations, it will not completely break down and can quickly return to the normal state. In addition, the setting of the microbial carrier mechanism in the aerobic tank 13 can cooperate with the activated sludge to purify the water quality. At the same time, there is an oxygen concentration gradient inside the filler of the biological carrier mechanism, which has a partial synchronous nitrification and denitrification function.

[0072] Further, as Figure 4 、 7 shown, in order to increase the attachable area of microorganisms and optimize the living environment of microorganisms; both the first microbial carrier mechanism 3 and the second microbial carrier mechanism 5 include a plurality of microbial carrier components 31, and the microbial carrier components 31 are detachably arranged in the lower chamber 200 of the anaerobic tank 11 or the aerobic tank 13 through connecting pieces 32.

[0073] In this embodiment, due to the zero discharge of sludge, the system has a high sludge concentration. Maintaining a high sludge concentration in the system will inevitably have a positive ratio of microorganisms to form a microecosystem. In this way, the treatment efficiency of sewage and the achievement of indicators will be greatly improved, and the equipment has a high volumetric loading and a short hydraulic retention time.

[0074] Further, as Figure 4 、 7 shown, in order to prevent the microbial filler rope 312 from swinging under the impact of water flow, ensure the reliable and stable attachment and growth of microorganisms, and improve the stability of the microbial ecosystem; the microbial carrier component 31 includes brackets 311 arranged opposite to each other up and down, and a plurality of microbial filler ropes 312 with both ends respectively connected to the brackets 311. The brackets 311 are detachably connected to the lower chamber 200 of the anaerobic tank 11 or the aerobic tank 13 through connecting pieces 32.

[0075] Further, as Figure 4 、 5As shown in FIGS. 6 and 8, both the first stirring mechanism 7 and the second stirring mechanism 9 include a stirring shaft 71, a stirring motor (not shown in the figures), and stirring blades 72. One end of the stirring shaft 71 extends to the outside of the anoxic tank 12 or the sedimentation tank 14 and is connected to the driving end of the stirring motor (not shown in the figures), and the other end is connected to the stirring blades 72;

[0076] The stirring motor (not shown in the figures) is connected to the anoxic tank 12 or the sedimentation tank 14;

[0077] The aerobic tank 13 is communicated with the anoxic tank 12 through a nitrification liquid reflux mechanism 8, and the aerobic tank 13 is communicated with the sedimentation tank 14 through an overflow mechanism 10.

[0078] In this embodiment, through the setting of the nitrification liquid reflux mechanism 8, the nitrification liquid in the aerobic tank 13 is refluxed to the bottom of the anoxic tank 12, and then slowly stirred by the first stirring mechanism 7 to be evenly diffused at the bottom of the tank, and then the nitrification liquid is supplied to the denitrifying bacteria as a carbon source. After sequential circulation, the nitrogen pollutants in the sewage are removed more thoroughly.

[0079] In this embodiment, through the setting of the overflow mechanism 10, the treated sewage in the aerobic tank 13 overflows to the bottom of the sedimentation tank 14, the supernatant in the sewage is discharged, and the precipitated activated sludge is all refluxed to the water inlet of the anaerobic tank 11 through the activated sludge reflux mechanism 20 and mixed with the incoming water to enter the anaerobic tank 11. After sequential circulation, a large amount of activated sludge in the anaerobic tank 11 is lysed into organic matter and recycled for treatment, and the activated sludge is endogenously digested to achieve zero sludge discharge; at the same time, slow stirring is performed by the second stirring mechanism 9 to prevent the accumulation of activated sludge.

[0080] Furthermore, as Figure 4 、 5 As shown in FIGS. 6 and 8, the nitrification liquid reflux mechanism 8 includes a reflux pipe 81 and a first drain pipe 82;

[0081] The first drain pipe 82 is sleeved outside the stirring shaft 71 of the first stirring mechanism 7. One end of the first drain pipe 82 is connected to the inner wall of the upper end of the anoxic tank 12 through a flange 30, and the other end extends above the stirring blades 72 and is in an open shape;

[0082] The upper chamber 100 of the aerobic tank 13 is communicated with the first drain pipe 82 through the reflux pipe 81, and a first electromagnetic valve 83 is arranged on the reflux pipe 81.

[0083] In this embodiment, the structural design of combining the nitrification liquid reflux mechanism 8 with the first stirring mechanism 7 enables the nitrification liquid to quickly reflux to the bottom of the tank and be evenly diffused, improving the efficiency and effect of biochemical treatment; moreover, the installation is convenient and the tank space is saved.

[0084] Furthermore, as Figure 4 、 5, as shown in FIGS. 6 and 8, the overflow mechanism 10 includes an overflow pipe 101 and a second sewer pipe 102;

[0085] The second sewer pipe 102 is sleeved outside the stirring shaft 71 of the second stirring mechanism 9. One end of the second sewer pipe 102 is connected to the inner wall of the upper end of the sedimentation tank 14 through a flange 30, and the other end extends above the stirring paddle 72 and is in an open shape;

[0086] The upper cavity 100 of the aerobic tank 13 is communicated with the second sewer pipe 102 through the overflow pipe 101, and a second solenoid valve 103 is arranged on the overflow pipe 101.

[0087] In this embodiment, the structure design of combining the overflow mechanism 10 with the second stirring mechanism 9 enables the activated sludge in the sewage to quickly flow back to the bottom of the tank, facilitating the rapid movement of the activated sludge in the sewage to the bottom of the tank and quickly entering the anaerobic tank 11 for decomposition, realizing zero discharge of activated sludge; moreover, it is convenient to install and saves the tank space.

[0088] In this embodiment, through the settings of the first solenoid valve 83 and the second solenoid valve 103, the automatic control of the flow rates of the return pipe 81 and the overflow pipe 101 is realized, ensuring the efficient treatment of sewage among the anoxic tank 12, the aerobic tank 13 and the sedimentation tank 14.

[0089] Furthermore, as Figure 4 、 5 , as shown in FIGS. 6 and 8, the aeration mechanism 6 includes a low-pressure blower 61, an air inlet pipe 62 and a membrane filament aeration disc 63. The low-pressure blower 61 is arranged outside the box body 1;

[0090] The air inlet end of the air inlet pipe 62 is connected to the low-pressure blower 61, and the other end extends into the upper end interior of the diversion pipe 24 and is connected to the membrane filament aeration disc 63.

[0091] In this embodiment, micro-power surface aeration technology is adopted for oxygen supply. Micro-bubbles are generated by the membrane filament aeration disc 63, and the bubbles are released from under the water surface. While the lift pump 22 circulates the water body up and down, the bubbles are brought to the bottom of the water to achieve oxygenation, and the oxygen is evenly diffused and transmitted by the water circulation.

[0092] Furthermore, as Figure 1 、 4 shown, the activated sludge return mechanism 20 includes a submersible sewage pump 201 and a sewage return pipe 202;

[0093] The submersible sewage pump 201 is arranged at the bottom of the sedimentation tank 14. One end of the sewage return pipe 202 is connected to the submersible sewage pump 201, and the other end is connected to the water inlet of the anaerobic tank 11; a third solenoid valve 203 is arranged on the sewage return pipe 202.

[0094] In this embodiment, the submersible sewage pump 201 is used to return all the precipitated activated sludge to the water inlet of the anaerobic tank 11, so that it is mixed with the incoming water and enters the anaerobic tank 11, thereby returning all the sludge generated at the end to the front end for anaerobic dissolution and digestion, achieving zero sludge discharge.

[0095] In this embodiment, through the interlocking control design of pumps and valves, the parameters of each process section are coordinated and controllable, the process is simple, and it can adapt to a wide range of sewage water qualities.

[0096] Furthermore, as Figure 4 , 5 , 6, and 8 show, in order to improve the strength of the inner sealing plate 21 and the connection stability of the diversion pipe 24, the lift pump 22, and the air guide pipe 23; the diversion pipe 24, the lift pump 22, and the air guide pipe 23 are all connected to the inner sealing plate 21 through flanges 30, and a support frame 40 is arranged on the side of the inner sealing plate 21 facing the lower cavity 200, and highly efficient sedimentation honeycomb inclined tubes can be selectively installed on the support frame 40.

[0097] For those skilled in the art, according to the technical solutions and concepts described above, various corresponding changes and deformations can be made, and all these changes and deformations should fall within the protection scope of the claims of this invention patent.

Claims

1. An integrated sewage treatment equipment, characterized in that: It comprises a box body, wherein an anaerobic tank, an anoxic tank, an aerobic tank and a sedimentation tank are sequentially arranged in the box body in the direction of sewage treatment flow, and the anaerobic tank, the anoxic tank, the aerobic tank and the sedimentation tank are structures with openings on the top and continuous sealing around the sides and the bottom; The anaerobic tank is provided with a first hydraulic circulation mechanism and a first microorganism carrier mechanism, the bottom of the anaerobic tank is connected with the anoxic tank, the anaerobic tank is provided with a first microorganism, and the anaerobic tank is not connected with the outside during operation; The first microorganisms are attached to the anaerobic tank through the first microorganism carrier mechanism to grow and iterate, and the first microorganisms include methanogens and anaerobic bacteria; The aerobic pool is provided with a second hydraulic circulation mechanism, a second microorganism carrier mechanism and an oxygenation mechanism, and the aerobic pool is provided with a second microorganism; The second microorganisms are attached to the aerobic tank through the second microorganism carrier mechanism to grow and iterate, and the second microorganisms include nitrifying bacteria and nitrite bacteria; The first hydraulic circulation mechanism and the second hydraulic circulation mechanism both include an inner sealing plate, a lifting pump, an air guide pipe and a plurality of flow guide pipes; The inner sealing plate separates the tank chambers of the anaerobic tank and the aerobic tank into an upper tank chamber and a lower tank chamber, and an exhaust hole is provided on the inner sealing plate, and an air guide pipe is provided on the exhaust hole; The lifting pump is located in the lower tank chamber, and is connected to the middle of the inner sealing plate. The lifting pump is used to lift the sewage in the lower tank chamber to the upper tank chamber; A plurality of said guide pipes are distributed around the outside of the lifting pump, one end of the guide pipe is located in the upper tank cavity and is lower than the air guide pipe, and the other end passes through the inner sealing plate downward and extends to the top of the tank bottom. The guide pipe allows the sewage in the upper tank cavity to flow into the bottom of the lower tank cavity by gravity; The anoxic tank is provided with a first stirring mechanism, a nitrification liquid reflux mechanism is provided between the anoxic tank and the aerobic tank, and a third microorganism is provided in the anoxic tank, and the third microorganism includes denitrifying bacteria; A connecting port is provided at the middle upper position between the anoxic tank and the aerobic tank, and the activated sludge and water after the denitrification reaction in the anoxic section overflow into the aerobic tank; A second stirring mechanism is arranged in the sedimentation tank, an overflow mechanism is arranged between the sedimentation tank and the aerobic tank, and an activated sludge return mechanism is arranged between the sedimentation tank and the anaerobic tank.

2. The integrated sewage treatment equipment according to claim 1, characterized in that: The first microorganism carrier mechanism and the second microorganism carrier mechanism each include a plurality of microorganism carrier components, and the microorganism carrier components are detachably arranged in the lower tank cavity of the anaerobic tank or the aerobic tank through connectors.

3. The integrated sewage treatment equipment according to claim 2, characterized in that: The microorganism carrier assembly comprises upper and lower brackets arranged opposite to each other, and a plurality of microorganism filler ropes whose two ends are respectively connected to the brackets. The bracket is detachably connected to the lower tank cavity of the anaerobic tank or the aerobic tank through a connecting piece.

4. The integrated sewage treatment equipment according to claim 1, characterized in that: The first stirring mechanism and the second stirring mechanism each include a stirring shaft, a stirring motor and a stirring blade, one end of the stirring shaft extends to the outside of the anoxic tank or the sedimentation tank and is connected to the driving end of the stirring motor, and the other end is connected to the stirring blade; The stirring motor is connected to the anoxic tank or the sedimentation tank; The aerobic tank is connected with the anoxic tank through a nitrification liquid reflux mechanism, and the aerobic tank is connected with the sedimentation tank through an overflow mechanism.

5. The integrated sewage treatment equipment according to claim 4, characterized in that: The nitrification liquid reflux mechanism comprises a reflux pipe and a first downcomer pipe; The first downpipe is sleeved on the outside of the stirring shaft of the first stirring mechanism, one end of the first downpipe is connected to the inner wall of the upper end of the anoxic tank through a flange, and the other end extends to the top of the stirring blade and is open; The upper pool chamber of the aerobic pool is connected with the first downpipe through a reflux pipe, and a first electromagnetic valve is arranged on the reflux pipe.

6. The integrated sewage treatment equipment according to claim 4, characterized in that: The overflow mechanism comprises an overflow pipe and a second down pipe; The second downpipe is sleeved on the outside of the stirring shaft of the second stirring mechanism, one end of the second downpipe is connected to the inner wall of the upper end of the sedimentation tank through a flange, and the other end extends to the top of the stirring blade and is open; The upper tank chamber of the aerobic tank is connected with the second downpipe through an overflow pipe, and a second electromagnetic valve is arranged on the overflow pipe.

7. The integrated sewage treatment equipment according to claim 1, characterized in that: The oxygenation mechanism comprises a low-pressure fan, an air inlet pipe and a membrane aeration plate, and the low-pressure fan is arranged outside the box; The air inlet end of the air inlet pipe is connected to the low-pressure fan, and the other end extends to the interior of the upper end of the guide pipe and is connected to the membrane aeration plate.

8. The integrated sewage treatment equipment according to claim 1, characterized in that: The activated sludge return mechanism comprises a submersible sewage pump and a sewage return pipe; The submersible sewage pump is arranged at the bottom of the sedimentation tank, one end of the return sewage pipe is connected to the submersible sewage pump, and the other end is connected to the water inlet of the anaerobic tank; the return sewage pipe is provided with a third solenoid valve.

9. The integrated sewage treatment equipment according to claim 1, characterized in that: The flow guide pipe, the lifting pump and the air guide pipe are all connected to the inner sealing plate through flanges, and a support frame is arranged on the side of the inner sealing plate facing the lower pool cavity.

Images