Small integrated sewage treatment device

Abstract

The utility model discloses a small integrated sewage treatment device and relates to the technical field of sewage treatment. The small integrated sewage treatment device comprises an anoxic zone, an aerobic zone, a biochemical precipitation zone, an adsorption filtration module and a pulse type stirring mechanism, the aerobic zone is arranged on one side of the anoxic zone, the biochemical precipitation zone is arranged on one side of the aerobic zone, the adsorption filtration module is arranged on one side of the biochemical precipitation zone, and the pulse type stirring mechanism is arranged on the other side of the biochemical precipitation zone. A pulse type stirring mechanism is arranged in the anoxic zone, and the anoxic zone, the aerobic zone and the biochemical precipitation zone form a biochemical treatment module. According to the small-sized integrated sewage treatment device, a partition plate I and a partition plate II are arranged between adjacent regions of the anoxic region, the aerobic region and the biochemical precipitation region, and the regions are divided into units which are communicated with one another by the partition plates.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, specifically relating to a small integrated wastewater treatment device. Background Technology

[0002] In suburban and rural areas far from municipal sewage networks, due to dispersed residences and complex terrain, it is difficult to collect and treat sewage over a large area. Similarly, it is also difficult to collect and treat sewage on-site. Using small-scale decentralized sewage treatment devices for on-site treatment is an inevitable way to control pollution.

[0003] Currently, various small-scale integrated wastewater treatment devices have emerged in China and are widely used throughout the country, achieving significant treatment results. Among these integrated wastewater treatment devices, AO (anaerobic / anoxic) processes and their modifications are the most common. However, operational results in many parts of China indicate that these integrated wastewater treatment devices generally have some problems. The structure of most integrated wastewater treatment devices is not well adapted to the characteristics of decentralized wastewater discharge in my country, failing to achieve stable and good operational results. For example, there are no mixing devices in the anaerobic and anoxic zones, or aeration and mixing are used directly; the aeration devices at the bottom of the aerobic zone generally use aeration components that cannot be lifted; and it is difficult to simultaneously meet the different effluent quality requirements in various locations.

[0004] To overcome the above problems and be applicable to environments with different effluent quality requirements, the structure and operation of existing integrated sewage treatment devices on the market need to be optimized and improved. Based on the shortcomings of existing technology, this utility model designs a small integrated sewage treatment device. Utility Model Content

[0005] To address the aforementioned problems in the existing technology, this utility model provides a small integrated sewage treatment device that is suitable for environments with different effluent quality requirements and can be installed above ground or underground.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a small integrated sewage treatment device, comprising an anoxic zone, an aerobic zone, a biochemical sedimentation zone, an adsorption filtration module, and a pulse stirring mechanism. An aerobic zone is provided on one side of the anoxic zone, a biochemical sedimentation zone is provided on one side of the aerobic zone, an adsorption filtration module is provided on one side of the biochemical sedimentation zone, and a pulse stirring mechanism is provided inside the anoxic zone. The anoxic zone, the aerobic zone, and the biochemical sedimentation zone constitute a biochemical treatment module.

[0007] A pulse-type stirring mechanism includes a pulse-type stirrer housing, an air inlet 2, a guide pipe, a sludge discharge port 2, and a gas dispersion hood. The pulse-type stirrer housing is located inside the anoxic zone. The air inlet 2 is located inside the pulse-type stirrer housing. The guide pipe is located inside the pulse-type stirrer housing. The sludge discharge port 2 is located at the bottom of the guide pipe. The gas dispersion hood is located inside the guide pipe.

[0008] As a preferred technical solution of the small integrated sewage treatment device of this utility model, an inlet pipe is provided on one side of the anoxic zone, an inlet regulating valve is provided on one side of the inlet pipe, an inlet stirring pipe assembly is provided on one side of the inlet pipe, a mixing guide cylinder is provided inside the anoxic zone, a maintenance well is provided at the top of the anoxic zone, a lifting lug is fixedly connected to the top of the anoxic zone, a partition is provided on one side of the anoxic zone, a ladder is provided on one side of the anoxic zone, and an equipment control cabinet is provided at the top of the anoxic zone.

[0009] As a preferred technical solution of the small integrated sewage treatment device of this utility model, the aerobic zone is equipped with a liftable aerator assembly, aerobic aeration packing, a water-filled compartment, a detachable flange, a maintenance wellhead, a mixed liquor return pipe, a biological sludge return pipe, and a partition plate.

[0010] As a preferred technical solution of the small integrated sewage treatment device of this utility model, the biochemical sedimentation zone is provided with a biochemical sedimentation sludge hopper, a guide cylinder II, an air-lift sludge return air supply pipe, a return compartment trough, an air-lift mixed liquor return air supply pipe, a biochemical sedimentation outlet on one side, an inspection wellhead III on the top, a lifting lug II on the top, and a snap-fit ​​connector I fixedly connected to one side of the biochemical sedimentation zone.

[0011] As a preferred technical solution of the small integrated sewage treatment device of this utility model, the adsorption filtration module is provided with an adsorption filtration sludge hopper inside, an adsorption filtration inlet 1 on one side of the adsorption filtration module, an adsorption filtration inlet 2 on one side of the adsorption filtration module, an outlet pipe inside the adsorption filtration module, an outlet 2 on one side of the outlet pipe, an overflow port on one side of the outlet pipe, filter media inside the adsorption filtration module, an aeration backwash pipe inside the adsorption filtration module, an aeration backwash air inlet at the top of the aeration backwash pipe, a sludge discharge port 1 on one side of the adsorption filtration module, an air-lift sludge discharge pipe inside the adsorption filtration module, an air-lift sludge discharge air supply pipe inside the adsorption filtration module, a level gauge inside the adsorption filtration module, a maintenance well 4 at the top of the adsorption filtration module, a water distribution trough inside the adsorption filtration module, a snap-fit ​​connector 2 on one side of the adsorption filtration module, a ladder 2 on one side of the adsorption filtration module, and a fence at the top of the adsorption filtration module.

[0012] As a preferred technical solution of the small integrated sewage treatment device of this utility model, the top of the gas diffuser is embedded in the anoxic zone, and a number of perforated air outlet holes with a diameter of 6-8 mm are opened on one side of the gas diffuser.

[0013] As a preferred technical solution of the small integrated sewage treatment device of this utility model, the aerobic aeration packing is cylindrical in shape with a diameter of 20-30 mm and a length of 10-15 mm. The specific gravity of the suspended packing is 0.92-0.98. The suspended packing is provided with outer wings around its perimeter, and the packing is provided with cross-shaped inner ribs. The inner wall of the packing is distributed with folds.

[0014] As a preferred technical solution of the small integrated sewage treatment device of this utility model, the water distribution tank is configured as two, which are respectively connected to the first adsorption filter inlet and the second adsorption filter inlet, and are located on the top of the filter media. The aeration backwash pipe is provided with air outlet holes with a diameter of 4-6 mm. The filter media is a composite filter media with particles of 10-30 mm in diameter, composed of activated alumina, bauxite and shale, and the total thickness of the filter media layer is less than 1.5 meters.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. When this utility model is in use, after the adsorption filtration module has been running for a period of time, the mud and impurities between the filter media will accumulate more and more, causing poor water flow in the filter media layer. The water level below the water distribution tank will gradually rise. When the water level rises to the overflow position, the water inlet of the adsorption filtration module will flow directly out from the overflow port of the water outlet pipe. At this time, the adsorption filtration module will experience short flow. Upon contact with water by the level gauge at the outlet pipe of the adsorption filtration module, the aeration backwashing program is automatically triggered. First, the water intake to the preceding biological treatment module is suspended. Second, pressurized gas is introduced through the airlift sludge discharge supply pipe, continuously lifting the sludge and water in the adsorption filtration sludge hopper area to the first sludge discharge port, thus discharging the water from the adsorption filtration sludge hopper and lowering the water level in the adsorption filtration module area. After 3-5 minutes of airlift sludge discharge operation, when the water level in the adsorption filtration module is lower than the level gauge's installation height, pressurized gas is introduced through the aeration backwashing inlet, and air bubbles are released from the aeration backwashing pipe's outlet, achieving aeration backwashing of the filter media layer. This washes away the adhering substances and impurities between the filter media, and the washed-away sludge and impurities settle by gravity into the adsorption filtration sludge hopper. After 5-10 minutes of aeration backwashing, the supply of pressurized gas to both the airlift sludge discharge supply pipe and the aeration backwashing inlet is simultaneously stopped; water intake to the biological treatment module is resumed. Subsequently, when the water level in the adsorption filtration module rises to the installation height of the level gauge, the aeration backwashing program is automatically triggered again. This device is equipped with two connectable biochemical treatment modules and an adsorption filtration module, which can be selected according to different wastewater discharge standards and can be flexibly applied to different demand scenarios. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a side view schematic diagram of the integrated structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the integrated top view structure of this utility model;

[0020] Figure 3 This is a side view of the split-type biochemical treatment module of this utility model;

[0021] Figure 4 This is a side view of the split-type adsorption and filtration module of this utility model.

[0022] Figure 5 This is a top view structural diagram of the split-type biochemical treatment module of this utility model;

[0023] Figure 6 This is a top view structural diagram of the split-type adsorption and filtration module of this utility model;

[0024] Figure 7 This is a schematic diagram of the second structure of the ladder of this utility model;

[0025] Figure 8 This is a schematic diagram of the equipment control cabinet structure of this utility model;

[0026] Figure 9 This is a schematic diagram of the pulse stirring mechanism of this utility model;

[0027] Figure 10 This is a schematic diagram of the gas hood structure of this utility model.

[0028] In the diagram: 1. Anoxic zone; 101. Inlet pipe; 102. Inlet regulating valve; 103. Inlet mixing pipe assembly; 104. Mixing guide tube; 105. Inspection wellhead 1; 106. Lifting lug 1; 107. Baffle 1; 108. Ladder 1; 109. Equipment control cabinet; 2. Aerobic zone; 201. Liftable aerator assembly; 202. Aerobic aeration packing; 203. Water-passing compartment. ; 204. Detachable flange; 205. Inspection wellhead two; 206. Mixed liquor return pipe; 207. Biochemical sludge return pipe; 208. Baffle two; 3. Biochemical sedimentation zone; 301. Biochemical sedimentation sludge hopper; 302. Guide cylinder two; 303. Air-lifted sludge return air supply pipe; 304. Return compartment tank; 305. Air-lifted mixed liquor return air supply pipe; 306. Biochemical sedimentation outlet; 30 7. Inspection wellhead three; 308. Lifting lug two; 309. Clip-on connector one; 4. Adsorption filter module; 401. Adsorption filter sludge hopper; 402. Adsorption filter inlet one; 403. Adsorption filter inlet two; 404. Outlet pipe; 405. Outlet two; 406. Overflow port; 407. Filter media; 408. Aeration backwash air inlet; 409. Aeration backwash pipe; 410. Sludge discharge. 411. Air-lift mud discharge pipe; 412. Air-lift mud discharge air supply pipe; 413. Liquid level gauge; 414. Inspection wellhead four; 415. Water distribution trough; 416. Clip-on connector two; 417. Ladder two; 418. Fence; 5. Pulse-type stirring mechanism; 501. Pulse-type stirrer housing; 502. Air inlet two; 503. Guide pipe; 504. Mud discharge port two; 505. Air diffuser hood. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1-10The present invention provides the following technical solution: a small integrated sewage treatment device, comprising an anoxic zone 1, an aerobic zone 2, a biochemical sedimentation zone 3, an adsorption filtration module 4, and a pulse stirring mechanism 5. An aerobic zone 2 is provided on one side of the anoxic zone 1, a biochemical sedimentation zone 3 is provided on one side of the aerobic zone 2, an adsorption filtration module 4 is provided on one side of the biochemical sedimentation zone 3, and a pulse stirring mechanism 5 is provided inside the anoxic zone 1. The anoxic zone 1, the aerobic zone 2, and the biochemical sedimentation zone 3 constitute a biochemical treatment module.

[0031] Further explanation is needed: the anoxic zone 1, aerobic zone 2 and biochemical precipitation zone 3 are connected by partition 107 and partition 208, which divide each zone into interconnected units.

[0032] The pulse stirring mechanism 5 includes a pulse stirrer housing 501, an air inlet 502, a guide pipe 503, a sludge discharge port 504, and a gas diffuser 505. The pulse stirrer housing 501 is located inside the oxygen-deficient zone 1. The air inlet 502 is located inside the pulse stirrer housing 501. The guide pipe 503 is located inside the pulse stirrer housing 501. The sludge discharge port 504 is located at the bottom of the guide pipe 503. The gas diffuser 505 is located inside the guide pipe 503.

[0033] The top of the ventilation hood 505 is embedded in the oxygen-deficient zone 1, and several perforated vent holes with a diameter of 6-8 mm are opened on one side of the ventilation hood 505.

[0034] Further explanation is needed: the pulse stirring mechanism 5 is a device capable of intermittent large bubble stirring, which includes a pulse stirrer housing 501, an air inlet 502, a guide pipe 503, and a diffuser 505; the pulse stirrer housing 501 is a box-shaped housing with a hollow bottom, the guide pipe 503 is a hollow tube with a fully open upper part and a mud discharge port 504 at the lower part; the diffuser 505 is funnel-shaped, with the lower part of the diffuser 505 inserted into the guide pipe 503 and the upper part of the diffuser 505 embedded in the pulse stirrer housing 501, and several perforated air outlets with a diameter of 6-8 mm are evenly opened on the upper part of the diffuser 505.

[0035] An inlet pipe 101 is installed on one side of the anoxic zone 1. An inlet regulating valve 102 is installed on one side of the inlet pipe 101. An inlet stirring pipe assembly 103 is installed on one side of the inlet pipe 101. A mixing guide cylinder 104 is installed inside the anoxic zone 1. An inspection well 105 is installed on the top of the anoxic zone 1. A lifting lug 106 is fixedly connected to the top of the anoxic zone 1. A partition 107 is installed on one side of the anoxic zone 1. A ladder 108 is installed on one side of the anoxic zone 1. An equipment control cabinet 109 is installed on the top of the anoxic zone 1.

[0036] The aerobic zone 2 is equipped with a liftable aerator assembly 201, an aerobic aeration packing material 202, a water-filled compartment 203, a detachable flange 204, a maintenance wellhead 205 at the top, a mixed liquor return pipe 206, a biological sludge return pipe 207, and a baffle plate 208 on one side.

[0037] The aerobic aeration packing 202 is cylindrical in shape, with a diameter of 20-30 mm and a length of 10-15 mm. The specific gravity of the suspended packing is 0.92-0.98. The suspended packing has outer wings around its perimeter, and the packing has a cross-shaped inner rib. The inner wall of the packing has folds.

[0038] The biochemical sedimentation zone 3 is equipped with a biochemical sedimentation sludge hopper 301, a guide tube 302, an air-lift sludge return air supply pipe 303, a return compartment 304, an air-lift mixed liquor return air supply pipe 305, a biochemical sedimentation outlet 306 on one side, an inspection well 307 on the top, a lifting lug 308 on the top, and a snap-fit ​​connector 309 fixedly connected to one side.

[0039] Further explanation is needed: the anoxic zone 1, aerobic zone 2, and biochemical sedimentation zone 3 constitute a biochemical treatment module. An inlet pipe 101 is located above anoxic zone 1. After entering anoxic zone 1, inlet pipe 101 splits into two pipes via a tee. Inlet pipe 101 then branches downwards into an inlet mixing pipe assembly 103. An inlet pipe 101 is equipped with an inlet regulating valve 102. An anoxic zone 1 contains a mixing guide cylinder 104, and a pulse-type mixing mechanism 5 is located at its bottom. Aerobic zone 2 is filled with aerobic aeration packing material 202, and a liftable aerator assembly 201 is located below it. The upper middle part between aerobic zone 2 and biochemical sedimentation zone 3 is provided with a water-passing partition 203 and a return partition 304. The three sides of the water-passing partition 203 are made of folded stainless steel mesh plates. The biochemical sedimentation zone 3 is provided with a second guide tube 302. The upper end of the central guide tube 302 is a straight pipe, and the lower end is a gradually expanding trumpet shape. The bottom of the biochemical sedimentation zone 3 is a biochemical sedimentation sludge hopper 301. A return partition 304 is provided on the side of the biochemical sedimentation zone 3 near aerobic zone 2. The return partition 304 is connected to the second guide tube 302. The bottom of the biochemical sedimentation zone 3 is also provided with a biochemical sedimentation sludge hopper 301 with a horizontal inclination of 55°, so that the suspended sludge is intercepted and settled in the biochemical sedimentation sludge hopper 301. A biochemical sedimentation outlet 306 is provided above the end of the biochemical sedimentation zone 3.

[0040] The shell of the biochemical treatment module is a horizontal square tank. The upper end of the biochemical treatment module is equipped with an inspection well. Inside, there is a gas-lifting mixed liquid return air supply pipe 305. One end of the gas-lifting mixed liquid return air supply pipe 305 is inserted from top to bottom into the return compartment 304, and the other end extends from the top of the shell to the mixing guide tube 104 in the anoxic zone 1. Inside the biochemical treatment module, there is a gas-lifting sludge return air supply pipe 303. One end of the gas-lifting sludge return air supply pipe 303 is inserted from top to bottom into the bottom of the sludge hopper in the biochemical sedimentation zone 3, and the other end extends from the top of the shell to the mixing guide tube 104 in the anoxic zone 1.

[0041] The adsorption filtration module 4 is internally equipped with an adsorption filtration sludge hopper 401. An adsorption filtration inlet 402 and an adsorption filtration inlet 403 are located on one side of the adsorption filtration module 4. An outlet pipe 404 is internally equipped with an outlet 405 on one side of the outlet pipe 404 and an overflow port 406 on one side of the outlet pipe 404. Filter media 407 is internally equipped with the adsorption filtration module 4. An aeration backwash pipe 409 is internally equipped with the adsorption filtration module 4, and an aeration backwash air inlet is located at the top of the aeration backwash pipe 409. 408. A sludge discharge port 410 is provided on one side of the adsorption filter module 4. An air-lift sludge discharge pipe 411 is provided inside the adsorption filter module 4. An air-lift sludge discharge air supply pipe 412 is provided inside the adsorption filter module 4. A level gauge 413 is provided inside the adsorption filter module 4. An inspection wellhead 414 is provided on the top of the adsorption filter module 4. A water distribution trough 415 is provided inside the adsorption filter module 4. A snap-fit ​​connector 416 is provided on one side of the adsorption filter module 4. A ladder 417 is provided on one side of the adsorption filter module 4. A fence 418 is provided on the top of the adsorption filter module 4.

[0042] Two water distribution tanks 415 are configured, which are connected to the first adsorption filter inlet 402 and the second adsorption filter inlet 403 respectively. They are located on the top of the filter media 407. The aeration backwash pipe 409 has an air outlet with a diameter of 4-6 mm. The filter media 407 is a composite filter media 407 with particles of 10-30 mm in diameter, composed of activated alumina, bauxite and shale. The total thickness of the filter media 407 layer is less than 1.5 meters.

[0043] Further explanation is needed: the housing of the adsorption filter module 4 is a vertical square tank, and the upper end of the adsorption filter module 4 is provided with a maintenance wellhead 414. The adsorption filter module 4 includes an adsorption filter inlet 402, an adsorption filter inlet 403, a water distribution tank 415, filter media 407, an aeration backwash pipe 409, an air-lift sludge discharge pipe 411, a sludge discharge port 410, a water outlet pipe 404, and a water outlet 405.

[0044] The upper end of the adsorption filtration module 4 is equipped with a maintenance wellhead 414. There are two water distribution troughs 415, both of which are connected to the first adsorption filtration inlet 402 and the second adsorption filtration inlet 403, and are located above the filter media 407 layer. The aeration backwash pipe 409 is connected to the aeration backwash air inlet 408 and is located below the filter media 407 layer. Air outlet holes with a diameter of 4-6 mm are opened on the aeration backwash pipe 409 located below the filter media 407 layer. One end of the air lift sludge discharge pipe 411 is inserted from top to bottom into the middle of the adsorption filtration sludge hopper 401, and the other end passes through the filter media 407 layer and is connected to the first sludge discharge port 410. One end of the water outlet pipe 404 is located below the filter media 407 layer, and the other end passes through the filter media 407 layer and is connected to the second water outlet 405.

[0045] An overflow port 406 is provided on the outlet pipe 404 of the adsorption filter module 4. The height of the overflow port 406 is higher than that of the second outlet 405. The second outlet 405 is slightly higher than the first adsorption filter inlet 402 and the second adsorption filter inlet 403. A level gauge 413 is installed at the overflow port 406 of the outlet pipe 404.

[0046] The air-lift sludge discharge pipe 411 of the adsorption filtration module 4 is connected to the sludge discharge port 410; the water outlet pipe 404 of the adsorption filtration module 4 is connected to the water outlet 405; the installation height of the sludge discharge port 410 is slightly higher than the height of the water outlet 405.

[0047] The adsorption filtration module 4's adsorption filtration inlet 1 402 and adsorption filtration inlet 2 403 are connected to the biochemical sedimentation outlet 306 of the biochemical treatment module by flanges.

[0048] Example

[0049] After the wastewater collected in the pre-treatment stage is filtered by a screen to remove large particles, it enters the treatment device through the inlet pipe 101 of the biochemical treatment module. By adjusting the opening degree of the inlet regulating valve 102, most of the sewage enters the bottom of the anoxic zone 1 of the biochemical treatment module through the inlet mixing pipe assembly 103, flushing the sludge at the bottom of the anoxic zone 1. A small portion of the inlet water enters the mixing guide tube 104. Under the continuous air intake of the pulse stirring mechanism 5 at the bottom of the anoxic zone 1, the bubble layer gradually accumulates from top to bottom in the pulse stirring housing 501 until most of the space of the pulse stirring housing 501 and the guide tube 503 is occupied by bubbles. When the gas layer reaches the lower inlet of the diffuser hood 505, the bubbles in the pulse stirring housing 501 instantly flow out from the perforated air outlet above the diffuser hood 505, releasing a large number of bubbles instantly. At the same time, the mud and water at the bottom of the anoxic zone 1 instantly fill the pulse stirring housing 501. In this process, the mud and water in the anoxic zone 1 are disturbed by the instantaneous large bubble stirring and the flow of mud and water. Subsequently, with continuous air intake at air inlet 502, the pulse agitator housing 501 is gradually filled with air bubbles again. Through this continuous cycle, pulse aeration and mixing are achieved in the anoxic zone 1.

[0050] A small portion of the inlet water and the muddy water from the mixed liquid in the aerobic zone 2, which are returned through the inlet regulating valve 102, enter the mixing guide tube 104, flow out from the lower end of the mixing guide tube 104, and then flow into the aerobic zone 2 by gravity from the water outlet between the anoxic zone 1 and the aerobic zone 2.

[0051] Under the aeration and stirring of the liftable aerator assembly 201 at the bottom of aerobic zone 2, the aerobic aeration packing 202 and suspended sludge in aerobic zone 2 continuously flow up and down in the water, and the microorganisms attached to the surface of the aerobic aeration packing 202 continuously degrade and remove organic matter in the water. When the liftable aerator assembly 201 malfunctions and needs maintenance, it can be removed from the maintenance wellhead 205 by disassembling the detachable flanges 204 at both ends of the liftable aerator assembly 201.

[0052] The muddy water in aerobic zone 2 enters the water-passing compartment 203 through the stainless steel mesh. Since the aperture of the stainless steel mesh in the water-passing compartment 203 is smaller than the particle size of the aerobic aeration packing 202, the aerobic aeration packing 202 is blocked outside the water-passing compartment 203. The three sides of the water-passing compartment 203 are folded plates. This structure can guide the aerobic aeration packing 202 to flow with the water flow and avoid accumulation at the inlet mesh of the water-passing compartment 203.

[0053] After the water flow separated from the aerobic aeration packing 202 enters the water-passing compartment 203, it then enters the return compartment 304. Under continuous air supply, the air-lift mixed liquid return air supply pipe 305 continuously lifts the water in the return compartment 304 into the mixed liquid return pipe 206, and then flows through the mixed liquid return pipe 206 to the top of the mixing guide cylinder 104 in the anoxic zone 1.

[0054] The water in the return compartment 304 flows by gravity into the guide tube 302 of the biochemical sedimentation zone 3, and enters the biochemical sedimentation zone 3 after passing through the lower end of the funnel-shaped guide tube 302. The sludge particles with a larger specific gravity in the water gradually settle into the biochemical sedimentation sludge hopper 301, and the supernatant flows out from the biochemical sedimentation outlet 306.

[0055] Under continuous air supply, the airlift sludge return air supply pipe 303 continuously lifts the sludge in the biochemical sedimentation sludge hopper 301 from the vertical section of the biochemical sludge return pipe 207 to the horizontal section of the biochemical sludge return pipe 207, and then flows into the mixing guide cylinder 104 of the anoxic zone 1.

[0056] For locations with high requirements for effluent quality, an adsorption filter module 4 can be added to the biochemical sedimentation outlet 306 of the biochemical treatment module. The biochemical treatment module and the adsorption filter module 4 are connected by snap-fit ​​connector 309 and snap-fit ​​connector 416.

[0057] Water from the biochemical sedimentation outlet 306 of the biochemical treatment module flows into the adsorption filtration inlet 402 and the adsorption filtration inlet 403 of the adsorption filtration module 4, and then flows out from the water distribution tanks 415 on both sides above the adsorption filtration module 4, evenly distributing water above the filter media 407 layer. Some phosphate and fine suspended impurities in the water are adsorbed and filtered by the adsorption filter media 407, and are thus adsorbed and retained. After being filtered layer by layer by the adsorption filter media 407 from top to bottom, the water enters the layer below the filter media 407 and finally flows out from the outlet 405 through the outlet pipe 404.

[0058] After the adsorption filtration module 4 has been running for a period of time, the sludge and impurities between the filter media 407 accumulate more and more, causing poor water flow in the filter media 407 layer. The water level below the water distribution tank 415 gradually rises. When the water level rises to the overflow port 406, the water inlet of the adsorption filtration module 4 flows directly out from the overflow port 406 of the water outlet pipe 404. At this time, the adsorption filtration module 4 experiences a short flow. When the level gauge 413 at the outlet pipe 404 of the adsorption filter module 4 comes into contact with the water, the aeration backwashing program is automatically triggered. First, the water intake of the pre-stage biochemical treatment module is suspended. Second, pressurized gas is introduced from the air-lift sludge discharge supply pipe 412 to continuously lift the sludge and water in the adsorption filter sludge hopper 401 to the sludge discharge port 410, thereby discharging the water in the adsorption filter sludge hopper 401 through the sludge discharge port 410, thus lowering the water level in the adsorption filter module 4. After the air-lift sludge discharge has been running for 3-5 minutes, the water level in the adsorption filter module 4 is lower than the installation height of the level gauge 413. Pressurized gas is then introduced from the aeration backwashing air inlet 408 and air bubbles are released from the air outlet of the aeration backwashing pipe 409, thereby aerating and backwashing the filter media 407 layer, flushing away the adhesions and impurities between the filter media 407. The flushed sludge and impurities are then gravity-sedied into the adsorption filter sludge hopper 401. After the aeration backwash filter media 407 has been running for 5-10 minutes, the supply of pressurized gas to the air supply pipe 412 for sludge removal and the aeration backwash air inlet 408 is simultaneously stopped; the water supply to the biochemical treatment module is then restored. Subsequently, when the water level in the adsorption filtration module 4 rises to the installation height of the level gauge 413, the aeration backwash program is automatically triggered again.

[0059] This device is equipped with two connectable biochemical treatment modules and an adsorption filtration module 4, which can be selected according to different wastewater discharge standards and can be flexibly applied to different needs.

[0060] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A small integrated wastewater treatment device, comprising an anoxic zone (1), an aerobic zone (2), a biochemical sedimentation zone (3), an adsorption filtration module (4), and a pulse stirring mechanism (5), characterized in that: An aerobic zone (2) is provided on one side of the anoxic zone (1), a biochemical precipitation zone (3) is provided on one side of the aerobic zone (2), an adsorption filtration module (4) is provided on one side of the biochemical precipitation zone (3), and a pulse stirring mechanism (5) is provided inside the anoxic zone (1). The anoxic zone (1), the aerobic zone (2), and the biochemical precipitation zone (3) together form a biochemical treatment module. The pulse stirring mechanism (5) includes a pulse stirrer housing (501), an air inlet (502), a guide pipe (503), a sludge discharge port (504), and a gas diffuser hood (505). The pulse stirrer housing (501) is located inside the anoxic zone (1). The pulse stirrer housing (501) has an air inlet (502) inside. The pulse stirrer housing (501) has a guide pipe (503) inside. The bottom of the guide pipe (503) has a sludge discharge port (504). The guide pipe (503) has a gas diffuser hood (505) inside.

2. The small integrated sewage treatment device according to claim 1, characterized in that: A water inlet pipe (101) is provided on one side of the anoxic zone (1), a water inlet regulating valve (102) is provided on one side of the water inlet pipe (101), a water inlet stirring pipe assembly (103) is provided on one side of the water inlet pipe (101), a mixing guide cylinder (104) is provided inside the anoxic zone (1), a maintenance wellhead (105) is provided on the top of the anoxic zone (1), a lifting lug (106) is fixedly connected to the top of the anoxic zone (1), a partition (107) is provided on one side of the anoxic zone (1), a ladder (108) is provided on one side of the anoxic zone (1), and an equipment control cabinet (109) is provided on the top of the anoxic zone (1).

3. The small integrated sewage treatment device according to claim 1, characterized in that: The aerobic zone (2) is equipped with a liftable aerator assembly (201), an aerobic aeration packing (202), a water-filled compartment (203), a detachable flange (204), a maintenance wellhead (205) at the top of the aerobic zone (2), a mixed liquor return pipe (206) inside the aerobic zone (2), a biochemical sludge return pipe (207) inside the aerobic zone (2), and a partition plate (208) on one side of the aerobic zone (2).

4. The small integrated sewage treatment device according to claim 1, characterized in that: The biochemical sedimentation zone (3) is equipped with a biochemical sedimentation sludge hopper (301), a guide tube (302), an air-lift sludge return air supply pipe (303), a return compartment (304), an air-lift mixed liquor return air supply pipe (305), a biochemical sedimentation outlet (306) on one side, a maintenance wellhead (307) on the top of the biochemical sedimentation zone (3), a lifting lug (308) on the top of the biochemical sedimentation zone (3), and a snap-fit ​​connector (309) fixedly connected to one side of the biochemical sedimentation zone (3).

5. A small integrated sewage treatment device according to claim 1, characterized in that: The adsorption filtration module (4) is equipped with an adsorption filtration sludge hopper (401) inside. An adsorption filtration inlet (402) is located on one side of the adsorption filtration module (4), and an adsorption filtration inlet (403) is located on one side of the adsorption filtration module (4). An outlet pipe (404) is located inside the adsorption filtration module (4), and an outlet (405) is located on one side of the outlet pipe (404). An overflow port (406) is located on one side of the outlet pipe (404). Filter media (407) is located inside the adsorption filtration module (4). An aeration backwash pipe (409) is located inside the adsorption filtration module (4), and an aeration backwash air inlet (409) is located at the top of the aeration backwash pipe (409). 08), the adsorption filter module (4) is provided with a sludge discharge port (410) on one side, an air-lift sludge discharge pipe (411) is provided inside the adsorption filter module (4), an air-lift sludge discharge air supply pipe (412) is provided inside the adsorption filter module (4), a liquid level gauge (413) is provided inside the adsorption filter module (4), an inspection wellhead (414) is provided on the top of the adsorption filter module (4), a water distribution trough (415) is provided inside the adsorption filter module (4), a snap-fit ​​connector (416) is provided on one side of the adsorption filter module (4), a ladder (417) is provided on one side of the adsorption filter module (4), and a fence (418) is provided on the top of the adsorption filter module (4).

6. A small integrated sewage treatment device according to claim 1, characterized in that: The top of the ventilation hood (505) is embedded in the oxygen-deficient area (1), and a number of perforated air outlets with a diameter of 6-8 mm are opened on one side of the ventilation hood (505).

7. A small integrated sewage treatment device according to claim 3, characterized in that: The aerobic aeration packing (202) is cylindrical in shape, with a diameter of 20-30 mm and a length of 10-15 mm. The specific gravity of the suspended packing is 0.92-0.

98. The suspended packing has outer wings around its perimeter, and the packing has a cross-shaped inner rib. The inner wall of the packing has folds.

8. A small integrated sewage treatment device according to claim 5, characterized in that: The water distribution tank (415) is configured as two, which are respectively connected to the first adsorption filter inlet (402) and the second adsorption filter inlet (403) and are located on the top of the filter media (407). The aeration backwash pipe (409) is provided with an air outlet with a diameter of 4-6 mm.

Images