Efficient comprehensive treatment device for new rural domestic sewage

Abstract

The utility model relates to the field of rural domestic sewage treatment, in particular to an efficient comprehensive treatment device for new rural domestic sewage, which comprises a first-stage decomposition box, a second-stage filter box, a third-stage filter box and a purified water backwashing box, an overflow area, a foam filler area and a second purification area are sequentially arranged in the second-stage filter box from bottom to top, an immersion type MBR membrane group is arranged in the third-stage filter box, and a water outlet is formed in one side of the purified water backwashing box. The micro-electrolysis technology, the multi-stage filtering technology and the backwashing technology are integrated, the excellent performance that blockage is not prone to occurring and effluent is clean is achieved, high efficiency, energy conservation, environmental protection and social benefits are achieved, the effluent obtained after sewage treatment is clear and reaches the standard, the sewage can be used for discharging or farm irrigation, environmental pollution is effectively relieved, the rural ecological environment is protected, and the ecological environment of the country is protected. The resource utilization of the sewage can be realized, and the concept of sustainable development is met.

Description

Technical Field

[0001] This utility model relates to the field of new rural domestic sewage treatment, specifically a high-efficiency comprehensive treatment device for new rural domestic sewage. Background Technology

[0002] In current rural toilet renovation projects in Jiangsu Province, common practices include installing a system with a three-compartment fiberglass septic tank in each household, or installing a traditional septic tank by manually digging a pit. These measures have alleviated rural toilet sanitation problems to some extent, but significant shortcomings and deficiencies remain:

[0003] 1. Incomplete treatment: Although the existing three-compartment fiberglass septic tanks can perform preliminary treatment of sewage through natural sedimentation and biodegradation, the treatment effect is limited and it is difficult to completely remove pollutants such as organic matter, nitrogen and phosphorus from the sewage, resulting in the effluent quality often failing to meet the discharge standards.

[0004] 2. Non-compliant discharge: Due to incomplete treatment, much of the sewage treated by septic tanks still contains high concentrations of pollutants. Direct discharge on-site will pollute the surrounding water bodies and soil, affecting the rural ecological environment and residents' health.

[0005] 3. Difficulty in maintenance and management: Some septic tanks lack an effective maintenance and management mechanism, and are prone to blockage and leakage after long-term operation, which not only affects the treatment effect, but may also cause secondary pollution;

[0006] 4. Inefficient resource utilization: Existing treatment methods fail to fully utilize the resources in wastewater, such as organic matter and water, and fail to achieve the resource utilization of wastewater, which is inconsistent with the concept of sustainable development.

[0007] 5. Technical limitations: Traditional septic tank technology has limitations in terms of treatment efficiency, effluent quality, and operational stability, making it difficult to meet increasingly stringent environmental protection requirements and the actual needs of rural sewage treatment.

[0008] In summary, existing wastewater treatment technologies used in the renovation of rural toilets in Jiangsu Province suffer from shortcomings and deficiencies, including incomplete treatment, non-compliant discharge, difficulties in maintenance and management, inefficient resource utilization, and technological limitations. Therefore, there is an urgent need to develop a more efficient, environmentally friendly, and easy-to-maintain rural wastewater treatment technology to address these current problems. Utility Model Content

[0009] The purpose of this utility model is to provide a high-efficiency integrated treatment device for rural domestic sewage, which integrates micro-electrolysis technology, multi-stage filtration technology and backwashing technology, and achieves excellent performance of not being easy to clog and producing clean effluent. It is highly efficient, energy-saving, environmentally friendly and socially beneficial, and is a major breakthrough in rural sewage treatment technology.

[0010] To solve the above-mentioned technical problems, this utility model provides a high-efficiency comprehensive treatment device for domestic sewage in new rural areas, including a primary decomposition tank, a secondary filtration tank, a tertiary filtration tank and a purified water backwashing tank connected in sequence. The primary decomposition tank is provided with a crushing zone, an iron-carbon packing zone and a purification zone from top to bottom. A sewage inlet is provided on one side above the crushing zone. The crushing zone is provided with a primary filter screen and a stirring mechanism. The primary filter screen is located above the stirring end of the stirring mechanism and is arranged towards the sewage inlet.

[0011] The secondary filter box is provided with an overflow zone, a foam packing zone, and a purification zone two from bottom to top. The bottom side of the overflow zone has an overflow port one that communicates with the inner cavity of the purification zone one. The side of the purification zone two has an overflow port two that communicates with the inner cavity of the tertiary filter box. The tertiary filter box is equipped with an immersion MBR membrane module. The outlet and backwash port of the immersion MBR membrane module are respectively connected to a pumping pipe one and a backwash pipe. A pumping pump is connected to the outside of the pumping pipe one. The outlet of the pumping pump is connected to an outlet pipe. The outlet pipe extends into the purified water backwash box. The purified water backwash box is equipped with a pumping pipe two. A backwash pump is connected to the outside of the pumping pipe two. The outlet of the backwash pump is connected to the backwash pipe. An outlet is provided on one side of the purified water backwash box.

[0012] Furthermore, the three-stage filtration box is equipped with an aeration pipe, and a blower is connected to the outside of the aeration pipe.

[0013] Furthermore, the aeration pipe is L-shaped and the aeration end of the aeration pipe is located at the bottom of the immersion MBR membrane module.

[0014] Furthermore, the primary filter screen is obliquely inserted into the inner wall of the crushing zone, and a sludge outlet is provided on the side wall of the crushing zone. The sludge outlet is located below the sewage inlet and above the bottom end of the primary filter screen, and a cover is provided on the outside of the sludge outlet.

[0015] Furthermore, the wastewater inlet is equipped with a wastewater pipe.

[0016] Furthermore, the stirring mechanism includes a stirring motor, a stirring shaft, and stirring blades. The stirring motor is fixedly installed on the top of the cover of the primary decomposition tank, and the rotating shaft of the stirring motor extends into the crushing zone and is connected to the stirring shaft. The stirring blades are connected to the lower end of the stirring shaft.

[0017] Furthermore, overflow port one and overflow port two are respectively provided with overflow pipe one and overflow pipe two.

[0018] Furthermore, both the first overflow pipe and the second overflow pipe are in a straight line shape.

[0019] Furthermore, the water outlet is located on one side of the bottom of the water purification backwashing tank, and the water outlet is equipped with a water purification pipe.

[0020] The beneficial effects of this utility model are:

[0021] 1. This utility model's high-efficiency comprehensive rural domestic sewage treatment device integrates micro-electrolysis technology, multi-stage filtration technology, and backwashing technology, achieving excellent performance in terms of non-clogging and clean effluent. It combines high efficiency, energy saving, environmental protection, and social benefits, representing a major breakthrough in rural sewage treatment technology. Specifically:

[0022] ① Iron-carbon filler micro-electrolysis technology:

[0023] Micro-electrolysis decomposition using an iron-carbon packing zone effectively decomposes organic matter in wastewater through the redox reaction of iron and carbon in the electrolyte solution, improving water quality. This technology not only enhances the biodegradability of wastewater but also lays a good foundation for subsequent treatment steps, solving the problem of incomplete treatment in current processes.

[0024] ② Foam packing filtration technology:

[0025] The secondary filter box is equipped with a foam packing zone. The unique structure and filter medium of the foam packing further purify the water. The foam packing has a high specific surface area and excellent adsorption performance, which can efficiently remove suspended solids, colloids and other impurities in sewage and improve the quality of the effluent.

[0026] ③ Submersible MBR membrane module final filtration technology:

[0027] The submersible MBR membrane module in the three-stage filtration box serves as the core filtration device. Through the action of the water pump, it achieves deep filtration of wastewater. The MBR membrane module combines the advantages of biological treatment and membrane separation technology, and can efficiently remove microorganisms, dissolved organic matter and other substances from wastewater, ensuring that the effluent meets environmental protection and reuse standards.

[0028] ④ Backwashing techniques to prevent membrane clogging:

[0029] To address the potential clogging issues of submersible MBR membrane modules, a backwashing pump is used to draw water from the clean water backwashing tank for backwashing operations, ensuring the long-term stable operation of the membrane module. This technology not only extends the service life of the MBR membrane module but also reduces maintenance costs.

[0030] 2. This utility model, by incorporating an aeration pipe within a three-stage filtration box and connecting a blower to the outside of the aeration pipe, provides sufficient aeration, prevents membrane clogging, and integrates a dual mechanism of blower aeration and backwashing pump. This ensures that the submersible MBR membrane module is not easily clogged, extends its service life, reduces maintenance frequency, and ensures long-term stable operation of the membrane module.

[0031] 3. This utility model utilizes a primary filter screen to intercept large debris, ensuring smooth subsequent treatment processes. A stirring motor breaks up small debris, enhancing the efficiency and effectiveness of wastewater treatment. Furthermore, the design of the waste outlet and cover allows for the removal of large debris by opening the cover, thus improving the filtration effect of the primary filter screen and the efficiency of rural domestic wastewater treatment.

[0032] 4. The high-efficiency new rural domestic sewage integrated treatment device of this utility model has energy-saving and environmental protection performance. It reduces energy consumption by utilizing the gravity flow of rural sewage. The blower and backwash pump are used as needed, which solves the current problem of difficult maintenance and management, realizes the efficient use of resources, conforms to the principle of green and sustainable development, and is suitable for rural sewage treatment needs of different scales. The device has a simple structure, is easy to operate, and is easy to promote to the vast rural areas.

[0033] 5. Through the use of this utility model, the treated wastewater is clear and meets the standards, and can be used for discharge or farmland irrigation, effectively reducing environmental pollution, protecting the rural ecological environment, realizing the resource utilization of wastewater, and conforming to the concept of sustainable development. Attached Figure Description

[0034] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the structure of the high-efficiency integrated treatment device for domestic sewage in new rural areas according to this utility model;

[0036] In the diagram: 1-Primary decomposition tank, 2-Secondary filtration tank, 3-Tertiary filtration tank, 4-Clean water backwash tank, 5-Water pump, 6-Outlet pipe, 7-Backwash pump, 8-Water pumping pipe II, 9-Sewage pipe, 10-Cap, 11-Crushing zone, 12-Iron-carbon packing zone, 13-Purification zone I, 14-Overflow pipe I, 15-Clean water pipe, 16-Aeration pipe, 17-Fan, 21-Foam packing zone, 22-Purification zone II, 23-Overflow pipe II, 24-Overflow zone, 31-Immersion MBR membrane module, 32-Water pumping pipe I, 33-Backwash pipe, 41-Outlet, 100-Cap, 111-Primary filter screen, 112-Agitator, 1121-Agitator motor, 1122-Agitator shaft, 1123-Agitator blade. Detailed Implementation

[0037] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0038] In one specific embodiment of this utility model, such as Figure 1 As shown, a high-efficiency new rural domestic sewage integrated treatment device includes a primary decomposition box 1, a secondary filter box 2, a tertiary filter box 3, and a purified water backwash box 4 connected in sequence. The primary decomposition box 1 is provided with a crushing zone 11, an iron and carbon packing zone 12, and a purification zone 13 from top to bottom. A sewage inlet is provided on one side above the crushing zone 11, and a sewage pipe 9 is provided at the sewage inlet. The crushing zone 11 is provided with a primary filter screen 111 and a stirring mechanism 112. The primary filter screen 111 is located above the stirring end of the stirring mechanism 112 and is set towards the sewage inlet.

[0039] The secondary filter box 2 is arranged from bottom to top as follows: an overflow zone 24, a foam packing zone 21, and a purification zone 22. The bottom of the overflow zone 24 has an overflow port 1 communicating with the inner cavity of the purification zone 13. The purification zone 22 has an overflow port 2 communicating with the inner cavity of the tertiary filter box 3. The tertiary filter box 3 contains an immersed MBR membrane module 31. The outlet and backwash port of the immersed MBR membrane module 31 are respectively connected to a pumping pipe 32 and a backwash pipe. The washing pipe 33 and the first water pump 32 are connected to a water pump 5. The outlet of the water pump 5 is connected to an outlet pipe 6. The outlet pipe 6 extends into the clean water backwash tank 4. The clean water backwash tank 4 is equipped with a second water pump 8. The second water pump 8 is connected to a backwash pump 7. The outlet of the backwash pump 7 is connected to the backwash pipe 33. The clean water backwash tank 4 is equipped with an outlet on one side. The outlet is located on the bottom side of the clean water backwash tank 4 and is equipped with a clean water pipe 15.

[0040] Specifically, in this embodiment, the first water pump pipe 32 passes through the three-stage filter box 3 and the clean water backwash box 4 in sequence and then extends out and is connected to the water pump 5; the backwash pipe 33 passes through the three-stage filter box 3 and the clean water backwash box 4 in sequence and then extends out and is connected to the backwash pump 7; the layout of the first water pump pipe and the backwash pipe can simplify the pipeline to a certain extent. Of course, in other embodiments, the pipeline layout can also be made according to the requirements.

[0041] In this embodiment, the three-stage filter box 3 is equipped with an aeration pipe 16, and a blower 17 is connected to the outside of the aeration pipe 16. The aeration pipe 16 is L-shaped, and the aeration end of the aeration pipe 16 is located at the bottom of the submerged MBR membrane module 31. This design can provide sufficient aeration and prevent membrane surface clogging. This embodiment integrates a blower aeration and a backwash pump dual mechanism to ensure that the submerged MBR membrane module is not easily clogged, extend its service life, reduce maintenance frequency, and ensure the long-term stable operation of the membrane module. In specific applications, the blower can be mounted on the cover of the three-stage filter box through a mounting bracket. Of course, the cover can be opened for easy maintenance of the three-stage filter box.

[0042] In this embodiment, the primary filter screen 111 is obliquely inserted into the inner wall of the crushing zone 11. After a certain period of use, the primary filter screen 111 can be pulled out for rinsing, which improves the filtration effect and practicality of this utility model. A sludge outlet is provided on the side wall of the crushing zone 11. The sludge outlet is located below the sewage inlet and above the bottom end of the primary filter screen 111. A cover 10 is provided on the outside of the sludge outlet, which can remove the sludge by opening the cover 10 when there is a lot of sludge.

[0043] In this embodiment, the stirring mechanism 112 includes a stirring motor 1121, a stirring shaft 1122, and a stirring blade 1123. The stirring motor 1121 is fixedly installed on the top of the cover 100 of the primary decomposition box 1, and the rotating shaft of the stirring motor 1121 extends into the crushing zone 11 and is connected to the stirring shaft 1122. The lower end of the stirring shaft 1122 is connected to the stirring blade 1123. Through the design of the stirring mechanism 112, the crushing effect of the waste can be improved, which facilitates the subsequent micro-electrolysis work.

[0044] In this embodiment, overflow pipe 14 and overflow pipe 23 are respectively provided at overflow port 1 and overflow port 2. Both overflow pipe 14 and overflow pipe 23 are in the shape of a straight line. Of course, in other embodiments, the overflow pipe can be designed into other shapes as needed.

[0045] The working process of this utility model is as follows:

[0046] Rural domestic sewage first flows into the primary decomposition tank 1 from the sewage pipe 9 by natural gravity. Large debris is effectively intercepted by the primary filter screen 111 to ensure the smooth flow of subsequent treatment processes. Subsequently, small debris is finely broken up by the stirring mechanism 112, which enhances the efficiency and effect of sewage treatment.

[0047] Next, the broken-up waste enters the iron-carbon packing zone 12, where it undergoes a micro-electrolysis process, which helps to decompose organic matter and improve water quality. The treated wastewater flows smoothly from the purification zone 13 at the bottom of the primary decomposition tank 1 through the overflow pipe 14 into the overflow zone 24 in the secondary filter tank 2. As the wastewater enters, it rises to the foam packing zone 21, where the water quality is further purified through its unique filter media.

[0048] After passing through the secondary filtration, the wastewater overflows through the overflow pipe 23 into the tertiary filtration box 3. At this time, the wastewater is efficiently extracted from the submersible MBR membrane module 31 by the water pump 5 and transported to the clean water backwashing box 4 through the outlet pipe 6. This step not only achieves deep filtration of wastewater, but also provides convenience for subsequent backwashing operations.

[0049] Finally, the purified water is discharged from the outlet through the water purification pipe 15, meeting all standards. It can be used for drainage or farmland irrigation, effectively reducing environmental pollution, protecting the rural ecological environment, and meeting environmental protection and reuse standards. The entire system not only improves the treatment efficiency of rural domestic sewage but also effectively protects the surrounding ecological environment and achieves sustainable resource utilization.

[0050] To address the potential clogging issue of the submerged MBR membrane module 31, this embodiment employs dual safeguards: Firstly, the blower 17 provides ample aeration to the submerged MBR membrane module 31 via the bottom aeration pipe 16, effectively preventing membrane clogging and maintaining high-efficiency filtration performance. Secondly, when more thorough cleaning is required, the backwash pump 7 draws water from the clean water backwash tank 4 and performs backwashing on the submerged MBR membrane module 31 via the backwash pipe 33, ensuring long-term stable operation of the membrane module, preventing clogging, extending service life, reducing maintenance frequency, and ensuring long-term stable operation of the membrane module.

[0051] The above-disclosed embodiment is merely a preferred embodiment of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A high-efficiency integrated treatment device for domestic sewage in new rural areas, characterized in that, The system includes a primary decomposition tank (1), a secondary filtration tank (2), a tertiary filtration tank (3), and a purified water backwashing tank (4) connected in sequence. The primary decomposition tank (1) is provided with a crushing zone (11), an iron-carbon packing zone (12), and a purification zone (13) from top to bottom. A sewage inlet is provided on one side above the crushing zone (11). The crushing zone (11) is provided with a primary filter screen (111) and a stirring mechanism (112). The primary filter screen (111) is located above the stirring end of the stirring mechanism (112) and faces the sewage inlet. The secondary filter box (2) is provided with an overflow area (24), a foam packing area (21), and a purification area (22) from bottom to top. The bottom side of the overflow area (24) has an overflow port one communicating with the inner cavity of the purification area one (13). The side of the purification area two (22) has an overflow port two communicating with the inner cavity of the tertiary filter box (3). The tertiary filter box (3) is equipped with an immersion MBR membrane module (31). The outlet and backwash port of the immersion MBR membrane module (31) are respectively connected to... A water pump (5) is connected to the outside of the water pump (5), and a water outlet pipe (6) is connected to the outlet of the water pump (5). The water outlet pipe (6) extends into the clean water backwash tank (4). A water pump (8) is provided inside the clean water backwash tank (4). A backwash pump (7) is connected to the outside of the water pump (8). The outlet of the backwash pump (7) is connected to the backwash pipe (33). A water outlet is provided on one side of the clean water backwash tank (4).

2. The high-efficiency comprehensive treatment device for domestic sewage in new rural areas according to claim 1, characterized in that, The three-stage filter box (3) is equipped with an aeration pipe (16), and a blower (17) is connected to the outside of the aeration pipe (16).

3. The high-efficiency comprehensive treatment device for domestic sewage in new rural areas according to claim 2, characterized in that, The aeration pipe (16) is L-shaped and the aeration end of the aeration pipe (16) is located at the bottom of the immersion MBR membrane module (31).

4. The high-efficiency comprehensive treatment device for domestic sewage in new rural areas according to claim 1, characterized in that, The primary filter screen (111) is obliquely inserted into the inner wall of the crushing zone (11). The side wall of the crushing zone (11) is provided with a sludge outlet. The sludge outlet is located below the sewage inlet and above the bottom end of the primary filter screen (111). A cover (10) is provided on the outside of the sludge outlet.

5. The high-efficiency comprehensive treatment device for domestic sewage in new rural areas according to claim 1, characterized in that, The sewage inlet is equipped with a sewage pipe (9).

6. The high-efficiency comprehensive treatment device for domestic sewage in new rural areas according to claim 1, characterized in that, The stirring mechanism (112) includes a stirring motor (1121), a stirring shaft (1122), and stirring blades (1123). The stirring motor (1121) is fixedly installed on the top of the cover (100) of the primary decomposition box (1), and the rotating shaft of the stirring motor (1121) extends into the crushing zone (11) and is connected to the stirring shaft (1122). The stirring blades (1123) are connected to the lower end of the stirring shaft (1122).

7. The high-efficiency comprehensive treatment device for domestic sewage in new rural areas according to claim 1, characterized in that, Overflow port one and overflow port two are respectively provided with overflow pipe one (14) and overflow pipe two (23).

8. The high-efficiency comprehensive treatment device for domestic sewage in new rural areas according to claim 7, characterized in that, Both the first overflow pipe (14) and the second overflow pipe (23) are in a straight line shape.

9. A high-efficiency comprehensive treatment device for domestic sewage in new rural areas according to claim 1, characterized in that, The water outlet is located on one side of the bottom of the water purification backwash box (4), and the water outlet is equipped with a water purification pipe (15).

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