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. There is an inspection port on the top of the reaction tank and is divided into connected septic tank area 1, septic tank area 2, adjustment area, biological reaction area and clean water area. The lower end of the filler, the lower end of the aeration pipe is connected to the aeration pan, the upper end is connected to the electric control box, the disinfection box in the clean water area is connected to the mud/water alternate discharge air lift system, the clean water pump is connected to the drain pipe, and the electromagnetic valve system of the electric control box is connected One end is connected to the aeration pump, the other end is connected to the first stripping mechanism, the aeration pipe and the mud/water alternate discharge stripping system, and the solenoid valve system is set by a timer. The invention solves the technical requirements of simple maintenance and discharge of small water volume sewage, and is suitable for the treatment of small water volume rural sewage and also for the treatment of small water volume industrial waste water.

Description

An integrated small sewage treatment device

technical field

The utility model relates to an integrated small sewage treatment device, which belongs to the technical field of sewage treatment.

Background technique

my country's urban sewage treatment mainly adopts the centralized collection and treatment mode, and the treatment process mostly adopts the conventional anaerobic-anoxic-aerobic (AAO) or circulating activated sludge (CASS) process. However, compared with urban sewage, rural sewage has small water volume and large fluctuations in daily water volume, and the water quality is also extremely unstable. Secondly, rural areas are relatively remote. Compared with cities and towns, there is a lack of professional and technical personnel who can maintain and control large-scale sewage treatment processes at any time. It is easy to cause facilities to be shut down due to failures due to untimely maintenance. Compared with cities and towns, it is more difficult for villages to invest a lot of operation and maintenance costs on sewage treatment facilities.

On the other hand, villages are subject to natural conditions and geographical environment problems, and villagers live in a scattered form with a long distance between households, which leads to the high investment in the promotion of the pipeline collection and then centralized processing model adopted in cities and towns in rural areas. question of cost. Therefore, it is more suitable for rural areas to use small decentralized treatment facilities to solve the problem of sewage treatment of villagers close to many households. If the biological pool of the decentralized sewage treatment device only adopts aerobic treatment process, the nitrogen and phosphorus in the effluent will affect the eutrophication of the rural water body. Considering the affordability of construction and installation and equipment operation and maintenance of rural residents, a small sewage treatment equipment with low-cost operation and maintenance is needed. This sewage treatment equipment should take into account the needs of small footprint and low operation and maintenance costs.

Utility model content

In order to solve the problems existing in the background technology, the utility model provides an integrated small sewage treatment device.

To achieve the above purpose, the utility model adopts the following technical scheme: an integrated small sewage treatment device, a water inlet pipe, a reaction barrel and an electric control box; the reaction barrel is vertically arranged and divided into a septic tank area by a partition , the second area of the septic tank, the adjustment area, the biological reaction area and the clean water area, and the top of the reaction barrel is provided with an inspection port; The septic tank area and the second area of the septic tank are connected with the adjustment area through the flow pipe, and the adjustment area is connected with the biological reaction area through the first air stripping mechanism, and the biological reaction area is provided with an aeration pipe and an aeration plate. and packing, the aeration pan is located at the lower end of the packing, the lower end of the aeration pipe is arranged in communication with the air inlet end of the aeration pan, the upper end of the aeration pipe is connected with the electric control box, and there is drainage in the clean water area Pipe, disinfection frame, clean water pump and mud/water alternate discharge air lift system; the disinfection frame is filled with chlorine tablets and communicated with the mud/water alternate discharge air lift system, the clean water pump is placed at the bottom of the clean water area and It is arranged in communication with the water inlet of the drainage pipe, and the water outlet of the drainage pipe extends to the ground. The electric control box includes a timer, a solenoid valve system and an aeration pump; one end of the solenoid valve system is connected to 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 alternate discharge air stripping system, and the electromagnetic valve system is set by a timer.

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

The utility model combines a septic tank with functions of manure water separation and a sewage treatment biological tank with functions of denitrification, phosphorus removal and organic matter removal. Effluent or reused; low overall operation and maintenance cost, small size and compact structure, capable of separating manure and water, removing organic matter and nitrogen and phosphorus from pollutants, strong resistance to changes in water quality and quantity, modular production, and effluent quality It can stably keep COD lower than 50mg/L and ammonia nitrogen 10mg/L, which can meet the discharge standards of rural domestic sewage in many places, and solve the technical requirements for simple maintenance and standard discharge of small water volume sewage. It is suitable for small water volume rural sewage treatment, and can also be used for Treatment of small volume industrial wastewater.

Description of drawings

Fig. 1 is the plan view of the present utility model;

Figure 2 is a plan view of the inspection port;

Figure 3 is an expanded cross-sectional view;

Figure 4 is a schematic diagram of an electric control box, a stripping mechanism and a mud/water alternate discharge stripping system.

Detailed ways

The technical solutions in the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Embodiment 1: As shown in Figures 1 to 4, the utility model discloses an integrated small sewage treatment device, a water inlet pipe 1, a reaction barrel and an electric control box 24; the reaction barrel is vertically arranged and is a cylinder It can also be a cylindrical structure with a square or oval cross-section, and is divided into a septic tank area 2, a second septic tank area 3, an adjustment area 4, a biological reaction area 5 and a clean water area 6 in turn around the center of the circle through the partition plate. (As shown in Figure 1), the top of the reaction barrel is provided with an inspection port 103 (as shown in Figure 2, through the inspection port 103 set at the top, each functional unit can be regularly maintained, cleaned and managed, and a suction septic tank is District and the sedimentary solid matter at the bottom of the second district); the water inlet pipe 1 is set in communication with the first district 2 of the septic tank, and the first district 2 of the septic tank and the second district 3 of the septic tank and the second district 3 of the septic tank are connected with the adjustment The zones 4 are all communicated and arranged through the flow pipe 8 (as shown in FIG. 3 , the flow pipe 8 is an inverted L-shaped structure, the flow pipe 8 is arranged vertically and the horizontal pipe passes through the corresponding partition plate and the adjacent area. communication, and then realize the communication of two adjacent areas), the adjustment zone 4 is set in communication with the biological reaction zone 5 through the first air stripping mechanism 9-1, and the biological reaction zone 5 is provided with an aeration pipe 10-2 , an aeration plate 12 and a filler 13, the aeration plate 12 is located 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 plate 12, and the aeration pipe 10-2 The upper end is connected with the solenoid valve two 22-2 of the solenoid valve system of the electric control box 24, and the clean water area 6 is provided with a drain pipe 7, a disinfection frame 14, a clean water pump 15 and a mud/water alternate discharge air lift system; The disinfection frame 14 is filled with chlorine tablets 16 for contact disinfection of clean water after treatment; and is arranged in communication with the mud/water alternate discharge air lift system, the clean water pump 15 is placed at the bottom of the clean water area 6 and is connected to the inlet of the drain pipe 7. The water outlet is connected and arranged, and the water outlet of the drainage pipe 7 extends to the ground for the discharge of the treated water; as shown in FIG. The electric control box 24 is realized, including a timer 21, a solenoid valve system and an aeration pump 23; one end of the solenoid valve system is connected to the aeration pump 23, and the other end of the solenoid valve system is respectively connected to the first air lift mechanism 9-1 , the aeration pipe 10-2 and the mud/water alternate discharge air stripping system are connected, the solenoid valve system is set by the timer 21, and the solenoid valve system is controlled by the time program set by the timer 21.

Embodiment 2: As shown in FIG. 4 , this embodiment is a further description of Embodiment 1. The first air lift mechanism 9-1 includes a ventilation pipe 10-1 and a riser 11. The air pipe one 10-1 and the riser pipe 11 are both vertically arranged, the upper end of the air pipe one 10-1 is connected with the solenoid valve one 22-1, and the lower end of the air pipe one 10-1 is communicated with the lower end of the riser pipe 11. The upper end of the riser pipe 11 is communicated with the biological reaction zone 5 through the partition between the adjustment zone 4 and the biological reaction zone 5 .

Embodiment 3: As shown in FIG. 4 , this embodiment is a further description of Embodiment 1. The mud/water alternate discharge air stripping system includes a mid-level water passage pipe 17, a connecting inclined pipe 18, a second gas The lifting mechanism 9-2 (used for sludge discharge) and the third air-lifting mechanism 9-3 (used for extracting the treated sewage); The partition between the two is communicated with the biological reaction zone 5, the lower end of the middle water passage pipe 17 is communicated with one end of the connecting inclined pipe 18, and the other end of the connecting inclined pipe 18 is communicated with the second air lift mechanism 9-2, The middle part of the connecting inclined pipe 18 is communicated with the third air-lifting mechanism 9-3. The timer 21 controls the mud/water alternate discharge air stripping system. First, the second air stripping mechanism 9-2 is turned on, and the mud-water mixture in the pipeline is discharged to the first zone 2 of the septic tank; The sewage treated in the biological reaction zone 5 flows into the disinfection frame 14 of the clean water zone. The mud/water alternate discharge air stripping system replaces the traditional sedimentation tank, realizes the separation of mud and water, and saves the tank volume of the integrated treatment device.

Embodiment 4: As shown in FIG. 4 , this embodiment is a further description of Embodiment 3. The second air stripping mechanism 9-2 includes a second ventilation pipe 10-3 and a sludge pipe 19. The upper end of the second ventilation pipe 10-3 is connected with the third solenoid valve 22-3, the lower end of the second ventilation pipe 10-3 is communicated with the lower end of the sludge pipe 19, and the bottom of the sludge pipe 19 is connected to the other side of the inclined pipe 18. One end is connected and arranged, and the upper end of the sludge pipe 19 is communicated with the first area 2 of the septic tank through the partition between the first area 2 of the septic tank and the clean water area 6 .

Embodiment 5: As shown in FIG. 4 , this embodiment is a further description of Embodiment 3. The third air-lifting mechanism 9-3 includes a ventilation pipe 10-4 and a clean water pipe 20. The upper end of the air pipe three 10-4 is connected with the solenoid valve four 22-4, the lower end of the air pipe three 10-4 is communicated with the lower end of the clean water pipe 20, and the bottom of the clean water pipe 20 is communicated with the middle part of the connection inclined pipe 18, The upper end of the clean water pipe 20 is arranged in communication with the disinfection frame 14 .

Embodiment 6: This embodiment is a further description of Embodiment 1. The clean water pump 15 is provided with a float, and the opening and closing of clean water is controlled by the floating state of the float.

Embodiment 7: This embodiment is a further description of Embodiment 1, and the material of the reaction barrel is steel, plastic or concrete.

Embodiment 8: This embodiment is a further description of Embodiment 7, and the plastic is FRP or PP material (polypropylene) or PVC material.

Embodiment 9: This embodiment is a further description of Embodiment 3, and the inclination angle of the connecting inclined pipe 18 is 15°˜30°.

Embodiment 10: This embodiment is a further description of Embodiment 1. The filler 13 occupies 3/4 of the volume of the biological reaction zone 5 and is located 20-25 cm below the design water level.

Embodiment 11: This embodiment is a further description of Embodiment 10, and the filler 13 is a spherical porous suspended filler or a suspended fixed filler.

The sewage treatment method of the present invention comprises the following steps:

Step 1: Small domestic sewage can be directly connected to the water inlet pipe 1 through the sewers in the toilet, kitchen and other places, and enter the first area 2 of the septic tank connected with the water inlet pipe 1;

Step 2: The feces are precipitated in the first zone 2 of the septic tank described in step 1 (the fecal water is left standing in the first zone 2 of the septic tank to complete the separation of solid particulate matter and liquid: the large particulate matter such as feces is precipitated to the bottom, and the upper It is the supernatant that does not contain large particulate matter), and the sewage (supernatant) enters the second area 3 of the septic tank through the corresponding flow pipe 8;

Step 3: The sewage is further precipitated in the second zone 3 of the septic tank (the solid-liquid separation is further achieved between the small solid particulate matter and the liquid, and the small solid particulate matter settles to the bottom of the tank), and then enters the adjustment zone 4 through the corresponding flow pipe 8 Inside;

Step 4: The sewage precipitated twice in Step 2 and Step 3 is temporarily stored in the adjustment zone 4, and the solenoid valve system (solenoid valve 1 22-1) is opened at the predetermined time of the timer 21, and the first air lift mechanism 9-1 is activated. , the sewage in the adjustment zone 4 is lifted into the biological reaction zone 5;

Step 5: Close the solenoid valve system (solenoid valve 1 22-1) after the timing described in step 4 expires;

Step 6: When the sewage is in the biological reaction zone 5, through a predetermined procedure, the solenoid valve 2 22-2 is activated to perform the sewage treatment in the intermittent aeration mode;

Step 7: Through the intermittent aeration of Step 6, the middle water passage 17 and the connecting inclined pipe 18 of the biological reaction zone 5 are connected to enter the mud-water mixture;

Step 8: Close the solenoid valve two 22-2, carry out precipitation in the biological reaction zone 5, after the precipitation period ends, the timer 21 activates the solenoid valve three 22-3 of the solenoid valve system, activates the second air stripping mechanism 9-2, and extracts And discharge the residual mud-water mixture in the neutral water-passing pipe 17 and the connecting inclined pipe 18, and return to the septic tank one area 2 through the sludge pipe 19;

Step 9: After a predetermined time, the solenoid valve three 22-3 of the solenoid valve system is closed, the solenoid valve four 22-4 is opened, and the third air lift mechanism 9-3 is activated;

Step ten: the treated and precipitated sewage is sucked into the disinfection frame 14 above the clean water area 6 through the third air stripping mechanism 9-3;

Step eleven: the sewage flows from top to bottom through the chlorine tablets 16 loaded in the disinfection frame 14, and enters the clean water area 6 for temporary storage after being disinfected by contact disinfection;

Step 12: As the water level in the clean water area 6 gradually rises, the float that comes with the clean water pump 15 gradually rises to the preset point, and then starts pumping;

Step 13: the extracted sewage is discharged or reused through the drain pipe 7;

Step 14: As the liquid level in the clean water area 6 drops, the clean water pump 15 is automatically turned off when the float is lowered to the bottom of the pool.

In the intermittent aeration mode described in step 6, the opening and closing of the electromagnetic valve system (the electromagnetic valve 22-2) is controlled by the timer 21, thereby controlling whether the aeration pipe 10-2 is ventilated or not, so as to realize the gap aeration. The operation adopts 12h as an operation cycle, 2 cycles a day. Each cycle includes five time periods, including the water intake period, the first period of intermittent aeration, the aerobic period, the second period of intermittent aeration and the precipitation period. Among them, the water inlet is 15 minutes, the intermittent aeration period is 1 hour, and the first period of intermittent aeration includes 4 cycles (each cycle includes aeration for 5 minutes, aeration is stopped for 10 minutes, and the total of four cycles is 1 hour); the aerobic period is 8 hours, and the intermittent aeration period is 8 hours. The second phase of aeration is 1 hour, and also includes four cycles (each cycle includes aeration for 5 minutes, aeration is stopped for 10 minutes, and the four cycles are 1 hour in total); the precipitation period is 1 hour and 45 minutes. Under the action of aerobic activated sludge, most of the organic matter in the sewage is oxidized to carbon dioxide and water, and ammonia nitrogen is oxidized to nitrate; in an anoxic environment under the condition of stopping aeration, the denitrifying bacteria in the sludge will convert the nitric acid. The salt nitrogen is converted into nitrogen, and the total nitrogen removal is finally realized. The environment of alternating anoxic and aerobic operation also contributes to the removal of phosphorus.

When the utility model is used, it needs to meet the requirements of the minimum buried depth of the covering soil and the freezing line. The whole device is buried underground, with only the electric control box 24 on the ground.

Each ventilation pipe is connected to the aeration pump 23 through a solenoid valve system. After the aeration pump 23 works, the gas flows downward through the corresponding ventilation pipe. A certain attraction is formed at the connection, and the mixed liquid is connected to the input gas and is lifted to another position through the mixed liquid riser.

Example 1:

The diameter of the reaction tank is 1.5m and the height is 1.5m. The volume ratio of the first zone of septic tank 2, the second zone of septic tank 3, the adjustment tank 4, the biological reaction zone 5 and the clean water zone 6 is 2:1:1:2:2, the operation effect The COD of the influent is 312-342 mg/L, the COD of the effluent is 10.2-15.2 mg/L; the ammonia nitrogen of the influent is 14.3-18.7 mg/L, the ammonia nitrogen of the effluent is 0.9-1.3 mg/L; the total nitrogen of the influent is 38 ～48mg/L, total nitrogen in effluent is 14.3～18.7mg/L; total phosphorus in influent is 4.06～5.29mg/L, and total phosphorus in effluent is 1.39～2.48mg/L. The sludge concentration in the biological reaction zone is 3573-4300 mg/L.

The sewage is first connected to the reaction barrel through the water inlet pipe 1, and the sewage gravity flows into the first area of the septic tank 2, the second area of the septic tank 3 and the adjustment area 4. The feces are deposited at the bottom of the first zone 2 of the septic tank and the bottom of the second zone 3 of the septic tank and are cleaned regularly, and the sedimented sewage then enters the adjustment zone 4. A first air stripping mechanism 9 - 1 is arranged in the conditioning zone 4 to lift the sewage to the biological reaction zone 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 passage pipe 17 is arranged in the middle of the partition plate between the biological reaction zone 5 and the clean water zone 6; System, disinfection frame 14 filled with disinfection tablets (chlorine tablets 16), and clean water pump 15 with its own float. The mud/water alternate discharge air stripping system lifts the sludge and sewage in the middle water passage pipe 17 of the biological reaction zone 5 accordingly. The mud/water alternate discharge air stripping system includes the middle water passage pipe 17 and the second air stripping mechanism 9 -2. The third air-lifting mechanism 9-3 and the connecting inclined pipe 18. After the first air stripping mechanism 9-1 lifts the sewage to the biological reaction zone 5, it completes the removal of pollutants according to the program control, and then completes the separation of mud and water through precipitation. Although the clear water area 6 is located above the median water passage pipe 17, the sludge entering during the aerobic reaction is accumulated in the median water passage pipe 17 and the connecting inclined pipe 18, and these sludges need to be discharged to the septic tank as excess sludge. First zone 2, firstly start the second air stripping mechanism 9-2 to return the sludge in the connecting inclined pipe 18 to the first zone 2 of the septic tank, and then start the third air stripping mechanism 9-3 to remove the middle position of the biological reaction zone 5 The clean water at the position of the water pipe 17 is transferred to the clean water area 6 for temporary storage after being filled with the disinfection frame 14 of the disinfection sheet. The clean water pump 15 in the clean water zone 6 then starts to drain. The aeration pump 23 is respectively connected to the first air stripping mechanism 9-1, the mud/water alternate discharge air stripping system and the aeration pipe 10-2, and the solenoid valve system is controlled by the timer 21 to realize the opening of each gas pipeline.

The feature of the utility model is to propose a small sewage treatment device constructed by merging a septic tank and a sewage treatment tank. The aeration pump 23 is used to drive to realize sewage lifting, anoxic mixing and aerobic treatment of sewage, excess sludge discharge and sewage lifting. . During application, the aeration pump 23, the timer 21 and the solenoid valve system are placed in the electric control box 24, and the aeration pump 23 is respectively discharged with the first air lift mechanism 9-1 and the mud/water alternately through the solenoid valve system. The system is connected to the aeration pipe 10-2, and the opening of the solenoid valve system is controlled by a timer 21 with a 24-hour schedule. The timer 21 is used to realize that the solenoid valve system connected to the aeration pump 23 is opened at different time periods, thereby completing sewage lifting, intermittent aeration, sludge discharge and clean water lifting respectively.

In this aspect, the operation and maintenance costs are low, the equipment is small in size and compact in structure, and it has the ability to separate manure and water, remove organic matter and nitrogen and phosphorus from pollutants, and has strong resistance to changes in water quality and quantity. Technical requirements for simple and standard discharge.

It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention may be implemented in other forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments are to be considered in all respects as exemplary and not restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is therefore intended that the All changes within the meaning and range of the required equivalents are embraced within the present invention. Any reference signs in the claims shall not be construed as limiting the involved claim.

In addition, it should be understood that although this specification is described in terms of embodiments, not each embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be 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.

Images