CN211999351U - Small-size sewage treatment plant of integration - Google Patents

Abstract

An integrated small sewage treatment device belongs to the technical field of sewage treatment. The top of the reaction barrel is provided with an inspection opening and is divided into a first septic tank area, a second septic tank area, a regulating area, a biological reaction area and a clear water area which are communicated, the water inlet pipe is communicated with the first septic tank area, the aeration disc is arranged at the lower end of the filler in the biological reaction area, the lower end of the aeration pipe is communicated with the aeration disc, the upper end of the aeration pipe is connected with the electric cabinet, the disinfection frame in the clear water area is communicated with the mud/water alternative discharge air lifting system, the clear water pump is communicated with the drain pipe, one end of an electromagnetic valve system of the electric cabinet is connected with the aeration pump, the other end of the electromagnetic valve system is connected with the first air lifting mechanism, the aeration pipe and. The invention solves the technical requirements of simple maintenance and standard discharge of the small-volume sewage, is suitable for the treatment of the small-volume rural sewage and can also be used for the treatment of the small-volume industrial wastewater.

Description

Small-size sewage treatment plant of integration

Technical Field

The utility model relates to a small-size sewage treatment plant of integration belongs to sewage treatment technical field.

Background

The urban sewage treatment in China mainly adopts a centralized collection treatment mode, and the treatment process mostly adopts a conventional anaerobic-anoxic-aerobic (AAO for short) or circulating activated sludge (CASS for short) process. However, compared with the urban sewage, the rural sewage has small water volume, large daily water volume change fluctuation and extremely unstable water quality, and the AAO and CASS processes applied to the urban sewage are difficult to adapt to the impact of the water quality and the water volume. Secondly, rural areas are far away, and compared with towns, professional technicians who can maintain and regulate large-scale sewage treatment processes at any time are lacked, and facilities are easy to stop running due to faults caused by untimely maintenance. Compared to towns, rural areas are more difficult to invest in significant operating and maintenance costs at sewage treatment facilities.

On the other hand, villages are limited by natural conditions and geographical environment problems, village residents are mostly in a dispersed form with long distance between households, and the problem that the centralized processing mode after pipeline collection adopted in towns is popularized in rural areas has high investment cost is caused. Thus, rural areas are better suited to use small decentralized treatment facilities to address the problem of sewage treatment in villagers of many immediate households. If the biological pond of the decentralized sewage treatment device only adopts an aerobic treatment process, nitrogen and phosphorus in the effluent can influence the eutrophication of rural water bodies. Considering the bearable capability of rural residents in construction and installation and equipment operation and maintenance, a small-sized sewage treatment device with low operation and maintenance cost is needed, and the sewage treatment device has the requirements of small occupied area and low operation and maintenance cost.

SUMMERY OF THE UTILITY MODEL

For solving the problem existing in the background technology, the utility model provides an integrated small-sized sewage treatment device.

The purpose is achieved, the utility model adopts the following technical proposal: an integrated small-sized sewage treatment device comprises a water inlet pipe, a reaction barrel and an electric cabinet; the reaction barrel is vertically arranged and is divided into a septic tank first area, a septic tank second area, a regulating area, a biological reaction area and a clear water area through partition plates, and an inspection opening is formed in the top of the reaction barrel; the water inlet pipe, the first septic tank area, the second septic tank area and the adjusting area are communicated through flow pipes, the adjusting area is communicated with the biological reaction area through a first air lifting mechanism, an aeration pipe, an aeration disc and a filler are arranged in the biological reaction area, the aeration disc is positioned at the lower end of the filler, the lower end of the aeration pipe is communicated with the air inlet end of the aeration disc, the upper end of the aeration pipe is connected with an electric cabinet, and a drain pipe, a disinfection frame, a clean water pump and a mud/water alternative discharge air lifting system are arranged in the clean water area; the disinfection frame is filled with chlorine tablets and communicated with the mud/water alternative discharge air stripping system, the clean water pump is placed at the bottom of the clean water area and communicated with a water inlet of a water drainage pipe, a water outlet of the water drainage pipe extends out of the ground, and the electric cabinet comprises a timer, an electromagnetic valve system and an aeration pump; one end of the electromagnetic valve system is connected with the aeration pump, the other end of the electromagnetic valve system is respectively connected with the first air stripping mechanism, the aeration pipe and the mud/water alternative discharge air stripping system, and the electromagnetic valve system is set through a timer.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model combines the septic tank with the function of separating the liquid dung and the sewage treatment biological tank with the functions of removing nitrogen and phosphorus and removing organic matters, the liquid dung is firstly connected with the air pump driving reaction barrel through the water inlet pipe, and the treated effluent is discharged or recycled through the water outlet pipe; the integral operation and maintenance cost is low, the equipment is small in size and compact in structure, the excrement-water separation and removal capabilities of organic matters and nitrogen and phosphorus in pollutants are realized, the water quality and water quantity change resistance is high, modular production can be realized, the water quality of effluent can stably keep COD (chemical oxygen demand) lower than 50mg/L and ammonia nitrogen 10mg/L, the discharge standard of domestic sewage in various countries is met, the technical requirements of simple maintenance and standard discharge of small-water-quantity sewage are met, and the device is suitable for small-water-quantity country sewage treatment and can also be used for small-water-quantity industrial wastewater treatment.

Drawings

Fig. 1 is a plan view of the present invention;

FIG. 2 is a plan view of an inspection port;

FIG. 3 is an expanded sectional view;

FIG. 4 is a schematic view of an electric cabinet, a stripping mechanism and a mud/water alternating discharge stripping system.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.

The first embodiment is as follows: as shown in fig. 1-4, the utility model discloses an integrated small-sized sewage treatment device, which comprises a water inlet pipe 1, a reaction barrel and an electric cabinet 24; the reaction barrel is vertically arranged and is of a cylindrical structure, or is of a cylindrical structure with a square or oval cross section, the reaction barrel is sequentially divided into a septic tank first area 2, a septic tank second area 3, a regulating area 4, a biological reaction area 5 and a clear water area 6 (as shown in figure 1) by partition plates around the circle center, and the top of the reaction barrel is provided with an inspection port 103 (as shown in figure 2, each functional unit can be regularly maintained, cleaned and managed through the inspection port 103 arranged at the top, and deposited solid matters at the bottoms of the septic tank first area and the septic tank second area are sucked); the water inlet pipe 1 is communicated with the first septic tank area 2, the first septic tank area 2 and the second septic tank area 3 as well as the second septic tank area 3 and the adjusting area 4 are communicated through a flow-through pipe 8 (as shown in fig. 3, the flow-through pipe 8 is of an inverted-L-shaped structure, the flow-through pipe 8 is vertically arranged, a horizontal pipe passes through a corresponding partition plate to be communicated with an adjacent area, and then the two adjacent areas are communicated), the adjusting area 4 is communicated with the biological reaction area 5 through a first air-lifting mechanism 9-1, an aeration pipe 10-2, an aeration disc 12 and a filler 13 are arranged in the biological reaction area 5, the aeration disc 12 is positioned at the lower end of the filler 13, the lower end of the aeration pipe 10-2 is communicated with the air inlet end of the aeration disc 12, and the upper end of the aeration pipe 10-2 is connected with a second electromagnetic valve 22-2 of an electromagnetic valve system, a drain pipe 7, a disinfection frame 14, a clean water pump 15 and a mud/water alternative discharge air stripping system are arranged in the clean water area 6; the disinfection frame 14 is filled with chlorine tablets 16 for contact disinfection of the treated clean water; the sewage treatment device is communicated with the mud/water alternative discharge gas stripping system, the clean water pump 15 is placed at the bottom of the clean water area 6 and is communicated with the water inlet of the water drainage pipe 7, and the water outlet of the water drainage pipe 7 extends out of the ground and is used for discharging treated water; as shown in fig. 4, the electric cabinet 24 is disposed on the ground, and the automatic control of the present invention is realized by the electric cabinet 24, which includes a timer 21, an electromagnetic valve system and an aeration pump 23; one end of the solenoid valve system is connected with the aeration pump 23, the other end of the solenoid valve system is respectively connected with the first air stripping mechanism 9-1, the aeration pipe 10-2 and the mud/water alternative discharge air stripping system, the solenoid valve system is set through a timer 21, and the solenoid valve system is controlled by a time program set by the timer 21.

The second embodiment is as follows: as shown in FIG. 4, the first stripping mechanism 9-1 includes a first ventilation pipe 10-1 and a lift pipe 11, the first ventilation pipe 10-1 and the lift pipe 11 are both vertically disposed, an upper end of the first ventilation pipe 10-1 is connected to a first electromagnetic valve 22-1, a lower end of the first ventilation pipe 10-1 is communicated with a lower end of the lift pipe 11, and an upper end of the lift pipe 11 is communicated with the bioreaction zone 5 through a partition plate between the regulation zone 4 and the bioreaction zone 5.

The third concrete implementation mode: as shown in fig. 4, this embodiment is further described with respect to the first embodiment, and the mud/water alternative discharge stripping system includes a middle water pipe 17, a connecting inclined pipe 18, a second stripping mechanism 9-2 (for discharging mud), and a third stripping mechanism 9-3 (for extracting treated sewage); the upper end of the middle position water passing pipe 17 penetrates through a partition plate between the biological reaction zone 5 and the clear water zone 6 to be communicated with the biological reaction zone 5, the lower end of the middle position water passing pipe 17 is communicated with one end of a connecting inclined pipe 18, the other end of the connecting inclined pipe 18 is communicated with a second air stripping mechanism 9-2, and the middle part of the connecting inclined pipe 18 is communicated with a third air stripping mechanism 9-3. The timer 21 controls the mud/water alternative discharge gas stripping system to start the second gas stripping mechanism 9-2 at first, so that mud-water mixed liquid in the pipeline is discharged to the first septic tank area 2; and then the third air stripping mechanism 9-3 is started, and the sewage treated in the extraction biological reaction zone 5 flows into the clean water zone disinfection frame 14. The mud/water alternative discharge gas stripping system replaces the traditional sedimentation tank, realizes mud-water separation, and saves the tank body volume of the integrated treatment device.

The fourth concrete implementation mode: as shown in fig. 4, the second air-lift mechanism 9-2 of the present embodiment is further described with respect to the third embodiment, and includes a second air pipe 10-3 and a sludge pipe 19, wherein the upper end of the second air pipe 10-3 is connected to a third electromagnetic valve 22-3, the lower end of the second air pipe 10-3 is communicated with the lower end of the sludge pipe 19, the bottom of the sludge pipe 19 is communicated with the other end of the connecting inclined pipe 18, and the upper end of the sludge pipe 19 is communicated with the first septic tank zone 2 by passing through a partition between the first septic tank zone 2 and the clean water zone 6.

The fifth concrete implementation mode: as shown in fig. 4, the third stripping mechanism 9-3 includes a vent pipe three 10-4 and a clean water pipe 20, an upper end of the vent pipe three 10-4 is connected to an electromagnetic valve four 22-4, a lower end of the vent pipe three 10-4 is communicated with a lower end of the clean water pipe 20, a bottom of the clean water pipe 20 is communicated with a middle portion of the connecting inclined pipe 18, and an upper end of the clean water pipe 20 is communicated with the disinfection frame 14.

The sixth specific implementation mode: in the first embodiment, the clean water pump 15 is provided with a float, and the on-off of the clean water is controlled by the floating state of the float.

The seventh embodiment: in this embodiment, the first embodiment is further explained, and the reaction barrel is made of steel, plastic or concrete.

The specific implementation mode is eight: this embodiment is further described with respect to the seventh embodiment, in which the plastic is glass fiber reinforced plastic or PP material (polypropylene) or PVC material.

The specific implementation method nine: in this embodiment, the third embodiment is further explained, and the inclined angle of the connecting inclined tube 18 is 15 to 30 °.

The detailed implementation mode is ten: in the first embodiment, the filler 13 occupies 3/4 of the volume of the biological reaction zone 5 and is 20-25 cm below the designed water level.

The concrete implementation mode eleven: this embodiment is a further description of the specific embodiment, and the filler 13 is spherical porous suspension filler or suspension type fixed filler.

The utility model discloses a sewage treatment method, including following step:

the method comprises the following steps: the small domestic sewage can be directly communicated with the water inlet pipe 1 through a sewer from a toilet, a kitchen and the like, and enters a septic tank first area 2 communicated with the water inlet pipe 1;

step two: feces are precipitated in the first septic tank area 2 in the step one (feces and water are kept stand in the first septic tank area 2 to complete separation of solid particle substances and liquid, namely large particle substances such as feces are precipitated to the bottom, and the upper part is supernatant without large particle substances), and sewage (supernatant) enters the second septic tank area 3 through a corresponding overflow pipe 8;

step three: the sewage is further precipitated in the second septic tank area 3 (solid-liquid separation is further realized by small solid particle substances and liquid, and the small solid particle substances are precipitated at the bottom of the tank) and then enter the regulating area 4 through the corresponding overflow pipe 8;

step four: temporarily storing the sewage precipitated in the second step and the third step in the regulating area 4, starting an electromagnetic valve system (a first electromagnetic valve 22-1) when the timer 21 is scheduled, starting the first air stripping mechanism 9-1, and lifting the sewage in the regulating area 4 into the biological reaction area 5;

step five: fourthly, closing the solenoid valve system (the first solenoid valve 22-1) after the timing time is over;

step six: starting a second electromagnetic valve 22-2 for sewage treatment in an intermittent aeration mode in the biological reaction zone 5 through a preset program;

step seven: the middle water pipe 17 of the biological reaction zone 5 and the connecting inclined pipe 18 are communicated to enter the muddy water mixed solution through the intermittent aeration in the step six;

step eight: closing the second electromagnetic valve 22-2, precipitating the biological reaction zone 5, starting the third electromagnetic valve 22-3 of the electromagnetic valve system by the timer 21 after the precipitation period is finished, starting the second air stripping mechanism 9-2, extracting and discharging residual muddy water mixed liquor in the middle overflow pipe 17 and the connecting inclined pipe 18, and returning the muddy water mixed liquor to the first septic tank zone 2 through the sludge pipe 19;

step nine: after the preset time, closing a third electromagnetic valve 22-3 of the electromagnetic valve system, opening a fourth electromagnetic valve 22-4, and starting a third air stripping mechanism 9-3;

step ten: pumping the treated and precipitated sewage into a disinfection frame 14 at the upper part of the clean water area 6 through a third air stripping mechanism 9-3;

step eleven: the sewage flows through the chlorine sheets 16 filled in the disinfection frame 14 from top to bottom, is disinfected in a contact disinfection mode and then enters the clear water area 6 for temporary storage;

step twelve: along with the gradual rise of the water level in the clean water area 6, the clean water pump 15 starts to pump water after the buoy on the clean water pump gradually floats to a preset point;

step thirteen: the extracted sewage is discharged or recycled through a drain pipe 7;

fourteen steps: as the liquid level in the clean water zone 6 drops, the clean water pump 15 is automatically turned off when the float drops to the bottom of the tank.

In the intermittent aeration mode in the sixth step, the opening and closing of the electromagnetic valve system (the electromagnetic valve 22-2) are controlled by the timer 21, so that whether the aeration pipe 10-2 is ventilated or not is controlled, and the intermittent aeration is realized. The operation adopts 12h as an operation period, and 2 periods are adopted in one day. Each period comprises 5 time periods of a water inlet period, an intermittent aeration first period, an aerobic period, an intermittent aeration second period, a sedimentation period and the like. Wherein the water is fed for 15min, the intermittent aeration period is 1h, and the intermittent aeration period comprises 4 cycles (each cycle comprises 5min of aeration, 10min of aeration stop, and four cycles total 1 h); the aerobic period is 8 hours, the intermittent aeration period is two and 1 hour, and the four cycles are also included (each cycle comprises 5 minutes of aeration, 10 minutes of stopping aeration, and 1 hour of the four cycles); the precipitation period was 1 hour and 45 min. Under the action of aerobic activated sludge, most organic matters in the sewage are oxidized into carbon dioxide and water, and ammonia nitrogen is oxidized into nitrate; in an anoxic environment under the condition of stopping aeration, denitrifying bacteria in the sludge convert nitrate nitrogen into nitrogen, so that total nitrogen is removed finally, and the environment of anoxic and aerobic alternate operation is also beneficial to removing phosphorus.

The utility model discloses need satisfy the requirement of minimum earthing buried depth and frozen line during the use. The whole device is buried underground, and only the electric cabinet 24 is arranged on the ground.

Each vent pipe is connected with an aeration pump 23 through an electromagnetic valve system, after the aeration pump 23 works, gas flows downwards through the corresponding vent pipe, certain attraction is formed at the joint of each vent pipe and the lifting pipe 11, the sludge pipe 19 or the clean water pipe 20, and the gas which is communicated and input by mixed liquid is lifted to another position through the mixed liquid lifting pipe.

Example 1:

the diameter of the reaction barrel is 1.5m, the height of the reaction barrel is 1.5m, and the volume ratio of a septic tank first area 2, a septic tank second area 3, an adjusting tank 4, a biological reaction area 5 and a clear water area 6 is 2: 1: 1: 2: 2, the operation effect is as follows: the COD of the inlet water is 312-342 mg/L, and the COD of the outlet water is 10.2-15.2 mg/L; the ammonia nitrogen of the inlet water is 14.3-18.7 mg/L, and the ammonia nitrogen of the outlet water is 0.9-1.3 mg/L; the total nitrogen of inlet water is 38-48 mg/L, and the total nitrogen of outlet water is 14.3-18.7 mg/L; the total phosphorus in the inlet water is 4.06-5.29 mg/L, and the total phosphorus in the outlet water is 1.39-2.48 mg/L. The sludge concentration of the biological reaction zone is 3573-4300 mg/L.

The sewage is firstly connected with the reaction barrel through the water inlet pipe 1, and the sewage flows into the first septic tank area 2, the second septic tank area 3 and the adjusting area 4 by gravity. The excrement is deposited at the bottom of the first septic tank area 2 and the second septic tank area 3 and is periodically cleaned, and the deposited sewage enters the adjusting area 4. A first air stripping mechanism 9-1 is arranged in the adjusting area 4 to lift the sewage to the biological reaction area 5. A filler 13 is arranged in the biological reaction zone 5, an aeration pipe 10-2 is arranged at the bottom, and a middle water passing pipe 17 is arranged in the middle of a partition board between the biological reaction zone 5 and the clear water zone 6; the inside of the clear water area 6 is provided with a mud/water alternative discharge air stripping system, a disinfection frame 14 filled with disinfection sheets (chlorine sheets 16) and a clear water pump 15 with a float. The mud/water alternative discharge air-lift system lifts the mud and the sewage in the middle water passing pipe 17 of the biological reaction zone 5 in turn, and comprises the middle water passing pipe 17, a second air-lift mechanism 9-2, a third air-lift mechanism 9-3 and a connecting inclined pipe 18. After the first air stripping mechanism 9-1 lifts the sewage to the biological reaction zone 5, the removal of pollutants is finished according to program control, and then the sludge-water separation is finished through precipitation. Although the clean water area 6 is arranged above the middle water passing pipe 17, the sludge entering during the aerobic reaction is accumulated in the middle water passing pipe 17 and the connecting inclined pipe 18, and the sludge is required to be discharged into the first septic tank area 2 as residual sludge, the second air stripping mechanism 9-2 is firstly started to return the sludge in the connecting inclined pipe 18 to the first septic tank area 2, and then the third air stripping mechanism 9-3 is started to transfer the clean water at the position of the middle water passing pipe 17 in the biological reaction area 5 to the clean water area 6 for temporary storage after passing through the disinfection frame 14 filled with disinfection sheets. The clean water pump 15 in the clean water zone 6 then starts the discharge. The aeration pump 23 is respectively connected with the first air stripping mechanism 9-1, the mud/water alternative discharge air stripping system and the aeration pipe 10-2, and the electromagnetic valve system is controlled by the timer 21 to realize the opening of each gas pipeline.

The utility model is characterized in that a small sewage treatment device which is built by combining a septic tank and a sewage treatment tank is provided, and sewage lifting, sewage anoxic mixing, aerobic treatment, residual sludge discharge and sewage lifting are realized by adopting the aeration pump 23 to drive. When the device is used, the aeration pump 23, the timer 21 and the electromagnetic valve system are placed in the electric cabinet 24, the aeration pump 23 is respectively connected with the first air-lift mechanism 9-1, the mud/water alternative discharge air-lift system and the aeration pipe 10-2 through the electromagnetic valve system, and the opening of the electromagnetic valve system is controlled by the 24-hour-counting timer 21. The electromagnetic valve system connected with the aeration pump 23 is started at different time intervals by adopting the timer 21, so that sewage lifting, intermittent aeration, sludge discharge and clean water lifting are respectively completed.

This aspect operation and maintenance cost are low, and equipment is small and compact structure, possess the water-dung separation, organic matter and nitrogen phosphorus's in the pollutant removal ability, and water quality water yield change ability reinforce can the modular production, has solved the technical demand that small-size small water yield sewage maintained simply and discharge to reach standard.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (11)

1. The utility model provides a small-size sewage treatment plant of integration, includes inlet tube (1), its characterized in that: the sewage treatment device also comprises a reaction barrel and an electric cabinet (24); the reaction barrel is vertically arranged and is divided into a septic tank first area (2), a septic tank second area (3), a regulating area (4), a biological reaction area (5) and a clear water area (6) through partition plates, and the top of the reaction barrel is provided with an inspection hole (103); the water inlet pipe (1) is communicated with the first septic tank area (2), the first septic tank area (2) and the second septic tank area (3) as well as the second septic tank area (3) and the adjusting area (4) are communicated through the overflow pipe (8), the adjusting area (4) is communicated with the biological reaction area (5) through a first air stripping mechanism (9-1), an aeration pipe (10-2), an aeration disc (12) and a filler (13) are arranged in the biological reaction zone (5), the aeration disc (12) is positioned at the lower end of the filler (13), the lower end of the aeration pipe (10-2) is communicated with the air inlet end of the aeration disc (12), the upper end of the aeration pipe (10-2) is connected with the electric cabinet (24), a drain pipe (7), a disinfection frame (14), a clean water pump (15) and a mud/water alternative discharge air stripping system are arranged in the clean water area (6); chlorine sheets (16) are filled in the disinfection frame (14) and are communicated with the mud/water alternative discharge air stripping system, the clean water pump (15) is placed at the bottom of the clean water area (6) and is communicated with a water inlet of the drain pipe (7), a water outlet of the drain pipe (7) extends out of the ground, and the electric cabinet (24) comprises a timer (21), an electromagnetic valve system and an aeration pump (23); one end of the solenoid valve system is connected with the aeration pump (23), the other end of the solenoid valve system is respectively connected with the first air stripping mechanism (9-1), the aeration pipe (10-2) and the mud/water alternative discharge air stripping system, and the solenoid valve system is set through a timer (21).

2. The integrated small-sized sewage treatment device according to claim 1, wherein: the first air stripping mechanism (9-1) comprises a first air pipe (10-1) and a lifting pipe (11), the first air pipe (10-1) and the lifting pipe (11) are both vertically arranged, the upper end of the first air pipe (10-1) is connected with a first electromagnetic valve (22-1), the lower end of the first air pipe (10-1) is communicated with the lower end of the lifting pipe (11), and the upper end of the lifting pipe (11) is communicated with the biological reaction zone (5).

3. The integrated small-sized sewage treatment device according to claim 1, wherein: the mud/water alternative discharge air stripping system comprises a middle water passing pipe (17), a connecting inclined pipe (18), a second air stripping mechanism (9-2) and a third air stripping mechanism (9-3); the upper end of the middle position water pipe (17) is communicated with the biological reaction zone (5), the lower end of the middle position water pipe (17) is communicated with one end of the connecting inclined pipe (18), the other end of the connecting inclined pipe (18) is communicated with the second air stripping mechanism (9-2), and the middle part of the connecting inclined pipe (18) is communicated with the third air stripping mechanism (9-3).

4. The integrated small-sized sewage treatment device according to claim 3, wherein: the second air lifting mechanism (9-2) comprises a second air pipe (10-3) and a sludge pipe (19), the upper end of the second air pipe (10-3) is connected with a third electromagnetic valve (22-3), the lower end of the second air pipe (10-3) is communicated with the lower end of the sludge pipe (19), the bottom of the sludge pipe (19) is communicated with the other end of the connecting inclined pipe (18), and the upper end of the sludge pipe (19) is communicated with the first septic tank area (2).

5. The integrated small-sized sewage treatment device according to claim 3, wherein: the third air lifting mechanism (9-3) comprises a vent pipe III (10-4) and a clean water pipe (20), the upper end of the vent pipe III (10-4) is connected with an electromagnetic valve IV (22-4), the lower end of the vent pipe III (10-4) is communicated with the lower end of the clean water pipe (20), the bottom of the clean water pipe (20) is communicated with the middle of a connecting inclined pipe (18), and the upper end of the clean water pipe (20) is communicated with the disinfection frame (14).

6. The integrated small-sized sewage treatment device according to claim 1, wherein: the clean water pump (15) is provided with a buoy.

7. The integrated small-sized sewage treatment device according to claim 1, wherein: the reaction barrel is made of steel, plastic or concrete.

8. The integrated small-sized sewage treatment device according to claim 7, wherein: the plastic is glass fiber reinforced plastic or PP material or PVC material.

9. The integrated small-sized sewage treatment device according to claim 3, wherein: the inclined angle of the connecting inclined pipe (18) is 15-30 degrees.

10. The integrated small-sized sewage treatment device according to claim 1, wherein: the filler (13) occupies 3/4 of the volume of the biological reaction zone (5) and is located 20-25 cm below the designed water level.

11. The integrated small-sized sewage treatment device according to claim 10, wherein: the filler (13) is spherical porous suspension filler or suspension type fixed filler.

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