CN212504213U

CN212504213U - AAO + MBR technology sewage treatment device

Info

Publication number: CN212504213U
Application number: CN201922377309.3U
Authority: CN
Inventors: 颜笑梅; 陈建华
Original assignee: Jiangsu Cunzhen Water Technology Services Co ltd
Current assignee: Jiangsu Cunzhen Water Technology Services Co ltd
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2021-02-09
Anticipated expiration: 2029-12-26

Abstract

The invention belongs to the technical field of municipal drainage, and relates to AAO + MBR (membrane bioreactor) process sewage treatment equipment which comprises a tank body, an anaerobic tank, an anoxic tank, an aerobic tank, an MBR membrane tank, a water outlet tank and other five functional areas, wherein the functional tanks are separated by partition plates. The invention is used for improving the water quality index of the effluent of the AAO sewage treatment equipment. After the domestic sewage is treated by the method, the chemical oxygen demand, the total nitrogen, the ammonia nitrogen, the total phosphorus, the SS and the fecal colibacillus in the sewage can be greatly reduced, and the method is suitable for areas such as primary and secondary protection areas of drinking water sources, ecological red line control areas and the like.

Description

AAO + MBR technology sewage treatment device

Technical Field

The invention belongs to the technical field of municipal sewage treatment, and relates to AAO + MBR (membrane bioreactor) process equipment for solving rural domestic sewage.

Background

The traditional AAO process sewage treatment equipment has simple process flow, short total hydraulic retention time and low operating cost, but is limited by the age of sludge, dissolved oxygen and nitrate nitrogen in return sludge, the phosphorus removal effect is not very ideal, and meanwhile, the denitrification effect depends on the reflux ratio of mixed liquor, and the reflux ratio of the AAO method is not too high (generally not more than 200%), so the denitrification effect cannot meet the higher requirement. For the above reasons, the AAO process sewage treatment equipment is greatly limited in use in areas such as primary and secondary protection areas of drinking water sources, ecological red line control areas, and the like, and improvement of treatment processes and water quality is required.

Disclosure of Invention

In view of the above problems, the present invention aims to provide an AAO + MBR process sewage treatment apparatus capable of effectively improving indexes of domestic sewage treatment, which can be used in areas such as primary and secondary protection areas of drinking water sources, ecological red line control areas, and the like, and has the advantages of being buried all over, high in integration level, high in automation degree, convenient to maintain, capable of recycling effluent automatically, and the like.

The invention adopts the following specific technical scheme for realizing the purpose:

the utility model provides a AAO + MBR technology sewage treatment device, includes a jar body, is equipped with inlet tube, overflow pipe, 1# through wires hole, air hose, air stripping device, 2# through wires hole, PAC medicament pipe, mud discharging port, suction pipe, produces water pipe, delivery port and 4 footing above the higher authority. Through 5 baffles such as 1# baffle, 2# baffle, 3# baffle, 4# baffle, 5# baffles, divide into the anaerobism pond with jar internal portion, the oxygen deficiency pond, good oxygen pond, 5 functional areas such as MBR membrane cisterna and play pond, use 1# water pipe between the functional area respectively, 2# water pipe, 3# water pipe, 4# water pipe, mix liquid back flow, aeration pipe and aeration equipment intercommunication, and be equipped with 4 access holes such as 1# access hole on jar body upper portion, 2# access hole, 3# access hole and 4# access hole.

As further optimization of the scheme, the bottom of the water inlet is higher than the top of the water outlet, and sewage flows in from the water inlet of the tank body and flows out from the water outlet of the tank body. When the sewage treatment facility has a problem, the sewage is discharged from the accident overflow port.

As a further optimization of the scheme, the anaerobic tank is positioned between the water inlet of the tank body and the No. 1 partition plate, spherical fillers are arranged in the anaerobic tank and used as carriers for anaerobic bacteria growth, and the No. 1 water passing pipe is arranged at the lower part of the No. 1 partition plate, so that the anaerobic tank is communicated with the anoxic tank.

As a further optimization of the scheme, the anoxic pond is positioned between the No. 1 partition plate and the No. 2 partition plate, and spherical fillers are arranged in the anoxic pond and are used as carriers of denitrifying bacteria and facultative aerobic bacteria. And the upper portion position of 2# baffle is equipped with 2# water pipe for oxygen deficiency pond and good oxygen pond intercommunication, the upper portion position of 2# baffle is equipped with mixed liquid back flow, and the mixed liquid that will come from good oxygen pond is followed mixed liquid back flow and is squeezed into the oxygen deficiency pond through the water pump, carries out the denitrification reaction.

As a further optimization of the scheme, the aerobic tank is positioned between the No. 2 partition plate and the No. 4 partition plate, and elastic packing is arranged between the No. 2 partition plate and the No. 3 partition plate.

As the further optimization of the scheme, the bottom position of the 3# clapboard is provided with a 3# water passing pipe, the upper position of the 4# clapboard is provided with a 4# water passing pipe communicated with the MBR membrane tank, the upper position of the 4# clapboard is provided with an aeration pipe communicated with the air pipe of the tank body, and compressed air enters the aeration pipe through the air pipe and reaches the aeration port of the MBR membrane group.

As a further optimization of the scheme, the aeration device is of a structure shaped like a Chinese character 'wang' and is communicated with the air pipe of the tank body, compressed air enters the aeration device from the air pipe of the tank body, a good environment is provided for the growth and the propagation of aerobic bacteria, aerobic respiration is carried out on activated sludge, and organic matters are further decomposed into inorganic matters.

As a further optimization of the scheme, the MBR membrane tank is positioned between the 4# partition plate and the 5# partition plate, the MBR membrane group and the air stripping device are arranged inside the MBR membrane tank, and after compressed air enters the air stripping device, sludge at the bottom of the MBR membrane tank can be lifted to the sludge discharge port.

As a further optimization of the scheme, the MBR membrane group is provided with an aeration port, a sludge discharge port, a water outlet pipe and an MBR flat membrane, and the flat membrane is provided with a water suction port and is connected to the water outlet pipe through a hose.

As a further optimization of the scheme, the No. 1 access hole is positioned above the anaerobic tank and the anoxic tank and is used for the access of the anaerobic tank and the anoxic tank; the # 2 access hole is positioned above the aerobic tank and is used for overhauling the aerobic tank; the 3# access hole is positioned above the MBR membrane tank and is used for overhauling the MBR membrane tank; the 4# access hole is positioned above the MBR membrane tank and the effluent tank and used for overhauling the MBR membrane tank and the effluent tank.

The invention has the following beneficial effects:

1. the invention integrates the functions of the anaerobic tank, the anoxic tank, the aerobic tank, the MBR membrane tank, the water outlet tank and the like into one device, has high integration level, simple and rapid transportation, installation and debugging processes, reduces the construction process and working procedures and shortens the construction period.

2. The accident overflow port is arranged, so that when the sewage treatment facility has problems and can not treat sewage, the sewage can be discharged from the accident overflow port, and the sewage is prevented from being directly discharged into the surrounding water body without being treated.

3. The invention is provided with the water outlet pool for storing and recycling the treated water, and the water outlet pool is used as water for cleaning the MBR membrane group and diluting the PAC medicament without using tap water.

4. According to the invention, the MBR flat membrane is arranged, so that the propagation of escherichia coli can be effectively prevented, and the transparency of the treated water is extremely high.

5. The invention is provided with the phosphorus removal device and the air stripping device, and phosphorus removal agents and sludge discharge are added through the PAC agent pipe, so that the phosphorus content in the discharged water can be effectively reduced.

Drawings

FIG. 1 is a front elevational view of the final assembly of the present invention;

FIG. 2 is a top plan view of the final assembly of the present invention;

FIG. 3 is a left side view of the final assembly of the present invention;

FIG. 4 is a cross-sectional view A-A of the present invention;

FIG. 5 is a cross-sectional view of the water inlet B-B of the present invention;

FIG. 6 is a cross-sectional view C-C of the present invention;

FIG. 7 is a cross-sectional view of a No. 1 separator plate D-D of the present invention;

FIG. 8 is a cross-sectional view of separator No. 2E of the present invention;

FIG. 9 is a partial view of a # 3 separator plate of the present invention;

FIG. 10 is a cross-sectional view of the 4# spacer plate F-F of the present invention;

FIG. 11 is a sectional view of separator No. 5G of the present invention;

fig. 12 is a partial view of an MBR membrane module of the present invention.

Reference numerals

In the figure: 1. a tank body; 2.1 # access hole; 3. a No. 2 access hole; 4. 3# access hole; 5. 4# access hole; 6. a No. 1 separator; 7. A # 2 separator plate; 8. a No. 3 separator; 9. 4# baffle plate; 10. a No. 5 separator; 11. a mixed liquid return pipe; 12. MBR membrane group; 13. an aeration pipe; 14. an aeration device; 15. an elastic filler; 16. a spherical filler; 1.1, a water inlet pipe; 1.2, an overflow pipe; 1.3, 1# threading hole; 1.4, an air pipe; 1.5, a gas stripping device; 1.6 and 2# threading holes; 1.7, PAC cartridge; 1.8, a sludge discharge port; 1.9, a water suction pipe; 1.10, a water production pipe; 1.11, a water outlet; 1.12, footing; 6.1 and 1# water pipes; 7.1, refluxing the mixed liquid through a wall pipe; 7.2 and 2# water pipes; 8.1 and 3# water pipes; 9.1, aerating wall pipes; 9.2 and 4# water pipes; 12.1, an aeration port; 12.2, a sludge discharge port of the MBR membrane group; 12.3, a water outlet pipe; 12.4, MBR flat membrane; 12.5, a water suction port; 12.6, a hose; A. an anaerobic tank; B. an anoxic tank; C. an aerobic tank; D. an MBR membrane tank; E. and (4) a water outlet pool.

Detailed Description

The invention is further described with reference to the following figures and examples.

Example (b):

as shown in fig. 1-12, an AAO + MBR process sewage treatment apparatus comprises a tank body 1, on which a water inlet pipe 1.1, an overflow pipe 1.2, a 1# threading hole 1.3, an air pipe 1.4, an air lifting device 1.5, a 2# threading hole 1.6, a PAC chemical pipe 1.7, a sludge discharge port 1.8, a water suction pipe 1.9, a water production pipe 1.10, a water outlet 1.11 and 4 feet 1.12 are arranged. Through 5 baffles such as 1# baffle 6, 2# baffle 7, 3

# baffle

8, 4

# baffle

9, 5# baffle 10, divide into 5 functional areas such as anaerobism pond A, oxygen deficiency pond B, good oxygen pond C, MBR membrane cisterna D and play pond E with jar 1 inside, use 1# water passing pipe 6.1 between the functional area respectively, 2# water passing pipe 7.2, 3# water passing pipe 8.1, 4# water passing pipe 9.2, mixed liquid back flow pipe 11, aeration pipe 13 and aeration equipment 14 intercommunication, and be equipped with 4 access holes such as 1# access hole 2, 2

# access hole

3, 3

# access hole

4 and 4# access hole 5 on jar 1 upper portion.

The water inlet 1.1 is an inlet for sewage to flow into the tank body 1, the overflow pipe 1.2 is an accident overflow port of the tank body 1, the water outlet 1.11 is an outlet of the tank body 1, and the bottom of the water inlet 1.1 is higher than the top of the water outlet 1.11.

The anaerobic tank A is positioned between a water inlet 1.1 of the tank body 1 and the No. 1 partition plate 6, spherical fillers 16 are arranged in the anaerobic tank A, and a No. 1 water passing pipe 6.1 is arranged at the lower part of the No. 1 partition plate 6, so that the anaerobic tank A is communicated with the anoxic tank B.

The anoxic tank B is positioned between the 1# partition plate 6 and the 2# partition plate 7, spherical filler 16 is arranged in the anoxic tank B, a 2# water passing pipe 7.2 is arranged at the upper part of the 2# partition plate 7, so that the anoxic tank B is communicated with the aerobic tank C, and a mixed liquid return pipe 11 is arranged at the upper part of the 2# partition plate 7.

The aerobic tank C is positioned between the No. 2 partition plate 7 and the No. 4 partition plate 9, and the elastic filler 15 is arranged between the No. 2 partition plate and the No. 3 partition plate.

The bottom position of 3# baffle 8 is equipped with 3# water pipe 9.2, the upper portion position of 4# baffle 9 is equipped with 4# water pipe 9.2 and MBR membrane cisterna intercommunication, just the upper portion position of 4# baffle 9 is equipped with aeration pipe 13, with the air hose 1.4 intercommunication of jar body 1, compressed air passes through air hose 1.4 and gets into aeration pipe 13 and reach MBR membrane group 12's aeration mouth 12.1.

The aeration device 14 is of a structure shaped like a Chinese character 'wang' and is communicated with the air pipe 1.4 of the tank body 1, and compressed air enters the aeration device 14 from the air pipe 1.4 of the tank body 1.

MBR membrane cisterna D is located between 4

# baffle

9 and 5# baffle 10, and MBR membrane cisterna D is inside to be set up MBR membrane group 12 and air stripping device 1.5, and after compressed air got into air stripping device 1.5, can mention the mud outlet 1.8 with the silt of MBR membrane cisterna D bottom.

The MBR membrane group 12 is provided with 1 aeration port 12.1, 1 MBR membrane group sludge discharge port 12.2, 1 water outlet pipe 12.3 and 12 MBR flat membrane 12.4, the flat membrane 12.4 is provided with a water suction port 12.5, and the flat membrane is connected to the water outlet pipe 12.3 through a hose 12.6.

The No. 1 access hole 2 is positioned above the anaerobic tank A and the anoxic tank B and is used for overhauling the anaerobic tank A and the anoxic tank B; the # 2 access hole 3 is positioned above the aerobic tank C and is used for overhauling the aerobic tank C; the 3# overhaul port 4 is positioned above the MBR membrane tank D and is used for overhauling the MBR membrane tank D; and the 4# access hole 5 is positioned above the MBR membrane tank D and the water outlet tank E and is used for overhauling the MBR membrane tank D and the water outlet tank E.

The working process of the invention is as follows:

1. sewage flows into the anaerobic tank from the water inlet, and organic matters in the sewage are subjected to hydrolysis, acidification and methanation reaction by anaerobic bacteria attached to the spherical filler, so that the organic matters in the sewage are removed, and the biodegradability of the sewage is improved. The sewage after anaerobic treatment flows into the anoxic tank from the No. 1 water pipe.

2. In the anoxic tank, the facultative microorganisms attached to the spherical filler take organic matters in the inlet water as a denitrification carbon source and energy source, take nitrate nitrogen in the return water as a denitrification oxygen source, carry out denitrification reaction on the returned mixed liquid, and degrade the organic matters at the same time. The sewage after the anoxic treatment flows into the aerobic tank from the No. 2 water pipe.

3. In the aerobic tank, aerobic bacteria are attached to the elastic filler, and the added compressed air can provide a good environment for the growth and the propagation of the aerobic microorganisms through the aeration device, so that the activated sludge can perform aerobic respiration, and organic matters are further decomposed into inorganic matters. A part of mixed liquor is pumped back to the anoxic tank through a mixed liquor return pipe under the action of a water pump to carry out denitrification reaction; and a part of mixed liquor flows into the MBR membrane tank through a No. 4 water pipe.

4. And an MBR membrane group, an aeration device, an air stripping device and a dosing device are arranged in the MBR membrane tank. Activated sludge and macromolecular substances in the tank are retained by utilizing the MBR flat sheet membrane, so that the higher MLSS concentration can be kept in the tank, and the activated sludge is treated more quickly and effectively than the activated sludge treated by the traditional method. Phosphorus removal medicament can be additionally arranged through the PAC medicament pipe, and phosphorus is adsorbed on sludge and discharged as residual sludge through the gas stripping device under the action of PAC and is treated independently. The transparency of the treated water is extremely high, and the SS value is extremely low. The Solid Retention Time (SRT) is long, the nitrification reaction is easy to occur, and the denitrification is realized through the nitrification and denitrification reaction by combining with the anaerobic zone in the biochemical tank.

5. The membrane pump sucks water out of the membrane and pumps the water into a water outlet pool. The water outlet pool can be used for storing and discharging reclaimed water after membrane filtration, is used as water for maintaining and flushing equipment, and can also be used as a sampling well.

6. The equipment can be maintained, maintained and overhauled through the 1# -4# access hole.

Claims

1. The MBR process sewage treatment equipment comprises a tank body (1), and is characterized in that a water inlet pipe (1.1), an overflow pipe (1.2), a No. 1 threading hole (1.3), an air pipe (1.4), an air stripping device (1.5), a No. 2 threading hole (1.6), a PAC medicament pipe (1.7), a sludge discharge port (1.8), a water suction pipe (1.9), a water production pipe (1.10), a water outlet (1.11) and 4 feet (1.12) are arranged on the tank body (1), the MBR process sewage treatment equipment is characterized in that a No. 1 clapboard (6), a No. 2 clapboard (7), a No. 3 clapboard (8), a No. 4 clapboard (9) and a No. 5 clapboard (10) are used for dividing the tank body (1) into an anaerobic tank (A), an anoxic tank (B), an aerobic tank (C), a membrane tank (D) and a water outlet tank (E) functional areas, and a No. 1 water passing pipe (6.1), a No. 2 water passing pipe (7.2), a No. 3 water passing pipe (, Mix liquid back flow (11), MBR membrane group (12) aeration pipe (13) and aeration equipment (14) and communicate each functional area, and be equipped with 1# access hole (2), 2# access hole (3), 3# access hole (4) and 4# access hole (5) on the upper portion of jar body (1).

2. The MBR process sewage treatment plant according to claim 1, characterized in that the inlet pipe (1.1) is an inlet of sewage flowing into the tank (1), the overflow pipe (1.2) is an accident overflow port of the tank (1), the outlet (1.11) is an outlet of the tank (1), and the bottom of the inlet pipe (1.1) is higher than the top of the outlet (1.11).

3. The MBR process sewage treatment device according to claim 1, wherein the anaerobic tank (A) is positioned between the water inlet 1.1 of the tank body (1) and a No. 1 partition plate (6), spherical packing (16) is arranged in the anaerobic tank (A), and a No. 1 water through pipe 6.1 is arranged at the lower position of the No. 1 partition plate (6), so that the anaerobic tank (A) is communicated with the anoxic tank (B).

4. The MBR process sewage treatment equipment according to claim 1, wherein the anoxic tank (B) is positioned between a No. 1 partition plate (6) and a No. 2 partition plate (7), spherical packing (16) is arranged in the anoxic tank (B), a No. 2 water through pipe (7.2) is arranged at the upper position of the No. 2 partition plate (7) so that the anoxic tank (B) is communicated with the aerobic tank (C), and a mixed liquid backflow wall through pipe (7.1) is arranged at the upper position of the No. 2 partition plate (7).

5. The MBR process sewage treatment plant according to claim 1, wherein the aerobic tank (C) is located between a # 2 partition plate (7) and a # 4 partition plate (9), and an elastic packing (15) is arranged between the # 2 partition plate (7) and the # 3 partition plate (8).

6. The MBR process sewage treatment device according to claim 1, wherein a 3# water passing pipe (8.1) is arranged at the bottom position of the 3# partition plate (8), a 4# water passing pipe (9.2) is arranged at the upper position of the 4# partition plate (9) and is communicated with the MBR membrane tank, an aeration wall penetrating pipe (9.1) is arranged at the upper position of the 4# partition plate (9) and is communicated with an air pipe (1.4) of the tank body (1), and compressed air enters an aeration pipe (13) through the air pipe (1.4) and reaches an aeration port (12.1) of the MBR membrane group (12).

7. The MBR process sewage treatment plant according to claim 1, characterized in that the aeration device (14) is a "king" shaped structure, communicating with the air pipe (1.4) of the tank (1), compressed air entering the aeration device (14) from the air pipe (1.4) of the tank (1).

8. The MBR process sewage treatment device according to claim 1, wherein the MBR membrane tank (D) is positioned between a 4# partition plate (9) and a 5# partition plate (10), and an MBR membrane group (12) and an air stripping device (1.5) are arranged inside the MBR membrane tank (D), so that when compressed air enters the air stripping device (1.5), sludge at the bottom of the MBR membrane tank (D) can be lifted to the sludge discharge port (1.8).

9. The MBR process sewage treatment device according to claim 1, wherein the MBR membrane group (12) is provided with 1 aeration port (12.1), 1 MBR membrane group sludge discharge port (12.2), 1 water outlet pipe (12.3) and 12 MBR flat membranes (12.4), and the flat membranes (12.4) are provided with water suction ports (12.5) which are connected to the water outlet pipe (12.3) through a hose (12.6).

10. The MBR process sewage treatment equipment according to claim 1, wherein the No. 1 access hole (2) is positioned above the anaerobic tank (A) and the anoxic tank (B) and is used for the access of the anaerobic tank (A) and the anoxic tank (B); the # 2 access hole (3) is positioned above the aerobic tank (C) and is used for overhauling the aerobic tank (C); the 3# access hole (4) is positioned above the MBR membrane tank (D) and is used for overhauling the MBR membrane tank (D); the 4# access hole (5) is positioned above the MBR membrane tank (D) and the water outlet tank (E) and is used for overhauling the MBR membrane tank (D) and the water outlet tank (E).