Domestic sewage treatment and recycling system for rural areas

Abstract

The invention discloses a rural domestic sewage treatment and reuse system, and belongs to the technical field of sewage treatment, the rural domestic sewage treatment and reuse system comprises: an initial precipitation unit for precipitating intensively collected domestic sewage to obtain a sewage supernatant; the water quality purification unit is used for filtering the sewage supernate; the drip irrigation recycling unit is used for conveying the sewage supernate to a small vegetable garden or a green belt for recycling; the information acquisition unit is used for acquiring parameter information related to sewage drip irrigation reuse through an internet of things technology; and the intelligent control unit is used for analyzing according to the acquired parameter information and determining the flow direction of the sewage supernate. The information acquisition unit acquires parameter information related to drip irrigation, such as soil water shortage information and weather information, judges whether the drip irrigation recycling unit is started or not by means of the information, and determines the duration of drip irrigation based on the parameter information, so that water and fertilizer can be accurately supplied to sewage according to crop requirements, and the water and fertilizer utilization rate is improved. And full utilization of resources is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a domestic sewage treatment and reuse system for rural areas. Background Art

[0002] Rural domestic sewage mainly refers to sewage generated by the daily life activities of rural residents, including drainage from flushing toilets, washing, bathing and kitchens. The drainage volume varies with time and season, and is intermittently discharged with large instantaneous changes in water volume. The water quality is characterized by low pollutant concentration, very little heavy metals and toxic and harmful substances, simple types of pollutants, and mainly organic pollution.

[0003] The existing treatment of rural domestic sewage is mostly to purify the sewage and discharge it after it meets the standard discharge requirements, so as to reuse it. However, since domestic sewage also contains a large amount of organic fertilizer components, if it is directly purified, it is easy to cause a waste of resources. Summary of the invention

[0004] The purpose of the present invention is to provide a system for treating and reusing domestic sewage in rural areas, so as to solve the problems faced in the above-mentioned background technology.

[0005] The purpose of the present invention can be achieved through the following technical solutions: A system for treating and reusing domestic sewage in rural areas, the system comprising: An initial sedimentation unit, which is used to precipitate the centrally collected domestic sewage to obtain sewage supernatant after initial sedimentation; A water purification unit, wherein the water purification unit filters the sewage supernatant by using a composite ecological filtration technology; A drip irrigation reuse unit, which is used to transport the sewage supernatant to a small vegetable garden or a green belt for watering and fertilizing for reuse; An information collection unit, wherein the information collection unit obtains parameter information related to the sewage drip irrigation reuse through the Internet of Things technology; An intelligent control unit is used to analyze the acquired parameter information, thereby transporting the sewage supernatant to a water purification unit or a drip irrigation reuse unit.

[0006] Furthermore, the water purification unit includes a sedimentation tank, an integrated water inlet pipe is installed on the sedimentation tank, the integrated water inlet pipe is connected to the drainage pipes of multiple households, a water distribution tank is also provided on one side of the sedimentation tank, and an overflow weir is provided between the water distribution tank and the sedimentation tank.

[0007] Furthermore, the water purification unit includes a volcanic rock filter, a zeolite filter is provided on one side of the volcanic rock filter, a ceramsite filter is provided on one side of the zeolite filter, a clean water tank is provided on one side of the ceramsite filter, and a water outlet pipe is installed on the clean water tank.

[0008] Furthermore, the volcanic rock filter, zeolite filter and ceramsite filter are respectively provided with a plurality of volcanic rocks, zeolites and ceramsites, and the particle size of the volcanic rock is 5-8 cm, the particle size of the zeolite is 3-5 cm, and the particle size of the ceramsite is 1-3 cm. The volcanic rock filter, zeolite filter and ceramsite filter are connected by water pipes, and each water pipe is discharged in an up-and-down staggered manner at the water inlet and outlet of each filter.

[0009] Furthermore, the drip irrigation reuse unit includes a resource reuse pool, a water pump is installed at the resource reuse pool, the water pump is connected to the drip irrigation pipe through a reuse pipe, and the drip irrigation pipe is used to transport the treated wastewater to the small vegetable garden and green belt for watering and fertilizing.

[0010] Furthermore, the water distribution pool is provided with a first water distribution pipe and a second water distribution pipe, the first water distribution pipe is connected to the volcanic rock filter pool, the second water distribution pipe is connected to the resource recycling pool, and the installation height of the second water distribution pipe is 20 cm lower than that of the first water distribution pipe.

[0011] Furthermore, the intelligent control unit includes a controller and a solenoid valve, the solenoid valve is installed on the second water distribution pipe, and the controller is used to analyze the acquired information to control the opening of the solenoid valve.

[0012] Furthermore, the working method of the controller is: The solenoid valve is in a closed state under normal circumstances, and the sewage supernatant of the initial sedimentation unit flows into the water purification unit through the first water distribution pipe for purification and discharge after meeting the standards;

[0013] Install multiple moisture sensors in the soil of small vegetable gardens and green belts to obtain soil moisture values , through the formula Get the water content value , and obtain real-time temperature values ​​from the Meteorological Bureau And light intensity , through the formula Determine the coefficient , when the judgment coefficient is greater than 1, the solenoid valve is opened, and the sewage supernatant preferentially flows into the resource reuse pool through the second water distribution pipe;

[0014] In the formula, as well as is the weight coefficient, is the mean soil moisture value, The highest moisture value, is the number of sensors whose moisture values ​​exceed the average moisture value among all humidity sensors, for The moisture value obtained by the i-th sensor among the sensors, and , is the temperature control value, is the light intensity control value, is the judgment threshold.

[0015] Furthermore, the controller is also used to analyze the acquired information to determine the drip irrigation duration, and its working method is as follows:

[0016] When the solenoid valve is opened, the average temperature for the next day is obtained from the weather bureau ,humidity , light intensity and rainfall , calculate the drip irrigation duration , the drip irrigation duration expression is: ;

[0017] In the formula, is the influence coefficient, is the drip irrigation area, The flow rate of the drip irrigation head.

[0018] Beneficial effects of the present invention: The present invention combines sewage treatment with intelligent drip irrigation. The water purification unit filters the sewage supernatant through composite ecological filtration technology and discharges it after meeting the standards. The drip irrigation reuse unit fully retains the organic fertilizer components in the sewage after removing larger impurities in the sewage, and drip-irrigates it in small vegetable gardens or roadside green belts for reuse, thereby ensuring full utilization of resources.

[0019] The present invention also obtains parameter information related to drip irrigation through an information collection unit, such as soil water shortage information, weather information, etc., and uses this information to determine whether to enable the drip irrigation reuse unit. At the same time, the duration of drip irrigation is determined based on the parameter information. In this way, sewage can be accurately supplied with water and fertilizer according to crop needs, ensuring full utilization of resources.

[0020] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0022] Figure 1 is a system structure block diagram of the present invention;

[0023] Figure 2 It is a plan view schematic diagram of the system of the present invention;

[0024] Figure 3 It is a cross-sectional schematic diagram of the system of the present invention.

[0025] Description of the accompanying drawings:

[0026] 1. Residents; 2. Water inlet pipe; 3. Sedimentation tank; 4. Overflow weir; 5. Water distribution tank; 6. Volcanic rock filter tank; 7. Volcanic rock; 8. Zeolite filter tank; 9. Zeolite; 10. Ceramic aggregate filter tank; 11. Ceramic aggregate; 12. Clean water tank; 13. Water outlet pipe; 14. First water distribution pipe; 15. Water pipe; 16. Second water distribution pipe; 17. Resource recycling tank; 18. Water pump; 19. Recycling pipe; 20. Drip irrigation pipe; 21. Small vegetable garden; 22. Green belt; 23. Solenoid valve; 24. Controller. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In one embodiment, a system for treating and reusing domestic sewage in rural areas is disclosed, such as Figure 1 As shown, the system includes: The initial sedimentation unit is used to precipitate the centrally collected domestic sewage to obtain the sewage supernatant after the initial sedimentation; Water purification unit, which filters and treats sewage supernatant through composite ecological filtration technology; Drip irrigation reuse unit, which is used to transport the sewage supernatant to a small vegetable garden or green belt for watering and fertilizing for reuse; Information collection unit, which uses Internet of Things technology to obtain parameter information related to sewage drip irrigation reuse; An intelligent control unit is used to analyze the acquired parameter information, thereby transporting the sewage supernatant to a water purification unit or a drip irrigation reuse unit.

[0029] Through the above technical scheme, this application combines sewage treatment with intelligent drip irrigation. The water purification unit filters the sewage supernatant through composite ecological filtration technology and discharges it after meeting the standards. The drip irrigation and reuse unit fully retains the organic fertilizer components in the sewage after removing larger impurities in the sewage, and drip-irrigates it in small vegetable gardens or roadside green belts for reuse to ensure full utilization of resources. At the same time, the information collection unit is used to obtain parameter information related to drip irrigation, such as soil water shortage information, weather information, etc., and use this information to determine whether to enable the drip irrigation and reuse unit. In this way, the sewage can be accurately supplied with water and fertilizer according to crop needs to ensure full utilization of resources.

[0030] like Figure 2 , Figure 3As shown, the water purification unit includes a sedimentation tank 3, on which an integrated water inlet pipe 2 is installed, which is connected to the drainage pipes of multiple households 1, and a water distribution tank 5 is also provided on one side of the sedimentation tank 3, and an overflow weir 4 is provided between the water distribution tank 5 and the sedimentation tank 3. The domestic sewage generated by the residents 1 is collected and then enters the sedimentation tank 3 through the water inlet pipe 2 for sedimentation, and large impurities, gravel with a large specific gravity, part of the suspended matter and organic matter can be removed by sedimentation, while the supernatant of the sedimentation tank 3 enters the water distribution tank 5 through the overflow weir 4, and then enters the water purification unit through two water distribution pipes for treatment to meet the standards and then discharged or enters the drip irrigation reuse unit for watering and fertilization. A first water distribution pipe 14 and a second water distribution pipe 16 are also provided at the water distribution pool 5. The first water distribution pipe 14 is connected to the volcanic rock filter 6, and the second water distribution pipe 16 is connected to the resource recycling pool 17. The installation height of the second water distribution pipe 16 is 20 cm lower than that of the first water distribution pipe 14. The intelligent control unit includes a controller 24 and a solenoid valve 23. The solenoid valve 23 is installed on the second water distribution pipe 16. The controller 24 is used to analyze the acquired information to control the opening of the solenoid valve 23. When drip irrigation is not normally required, the solenoid valve 23 is in a closed state, and the sewage supernatant flows into the composite ecological filter in the water purification unit through the first water distribution pipe 14 for filtration. The water purification unit mainly includes a volcanic rock filter 6, a zeolite filter 8 is provided on one side of the volcanic rock filter 6, a ceramsite filter 10 is provided on one side of the zeolite filter 8, a clean water tank 12 is provided on one side of the ceramsite filter 10, and a water outlet pipe 13 is installed on the clean water tank 12. A plurality of volcanic rocks 7, zeolites 9, and ceramsites 11 are respectively provided in the volcanic rock filter 6, the zeolite filter 8, and the ceramsite filter 10, and the particle size of the volcanic rock 7 is 5-8 cm, and the particle size of the zeolite 9 is 3-5 cm The particle size of the ceramsite 11 is 1-3 cm. The sewage is fully filtered and adsorbed through the volcanic rock filter 6, the zeolite filter 8 and the ceramsite filter 10 in sequence. The volcanic rock filter 6, the zeolite filter 8 and the ceramsite filter 10 are connected by a water pipe 15, and each water pipe 15 is discharged in an up-down staggered manner at the inlet and outlet of each filter. In this way, the sewage is staggered up-down in the inlet and outlet of each filter, ensuring that the water flows vertically up and down, and flows in an "S"-shaped path in the horizontal direction, which can prolong the contact time between the sewage and the filter material and the surface biofilm, enhance the purification capacity, and the water purified by the ecological filter is discharged through the clear water tank 12 to meet the standards.When the controller 24 detects that watering and fertilizing are needed, the solenoid valve 23 is controlled to open. Since the installation height of the second water distribution pipe 16 is 20 cm lower than that of the first water distribution pipe 14, the sewage supernatant will preferentially flow into the drip irrigation reuse unit, and the drip irrigation reuse unit includes a resource reuse pool 17. A water pump 18 is installed at the resource reuse pool 17. The water pump 18 is connected to the drip irrigation pipe 20 through a reuse pipe 19. The drip irrigation pipe 20 is used to transport the treated wastewater to the small vegetable garden 21 and the green belt 22 for watering and fertilizing. In this way, the sewage is transported to each drip irrigation pipe 20 through the action of the water pump 18, and the small vegetable garden 21 and the green belt 22 are watered and fertilized, thereby realizing the reuse of wastewater.

[0031] The domestic sewage generated by household 1 is collected and then enters sedimentation tank 3 through water inlet pipe 2 for sedimentation, and large impurities, gravel with larger specific gravity, some suspended solids and organic matter are removed by sedimentation. The supernatant of the sedimentation tank 3 enters the water distribution tank 5 through the overflow weir 4, and then enters the composite ecological filter tank through the water distribution pipe for treatment and discharge to the standard or enters the drip irrigation system for watering and fertilization. The water distribution tank 5 is provided with two water distribution pipes. The drip irrigation system water distribution pipe (the second water distribution pipe 16) is 20 cm lower than the composite ecological filter tank water distribution pipe (the first water distribution pipe 14), and the drip irrigation system water distribution pipe is equipped with an electromagnetic valve 23; when it is sunny or hot weather, the electromagnetic valve 23 on the drip irrigation system water distribution pipe is opened, and the supernatant of the sedimentation tank 3 flows into the resource recycling pool 17 first, and the organic-rich sewage is transported to the small vegetable garden 21 or the roadside green belt 22 in the village for watering and fertilization through the drip irrigation system; when it is rainy or cold weather, the electromagnetic valve 23 on the drip irrigation system water distribution pipe is closed, and the supernatant of the sedimentation tank 3 flows into the composite ecological filter tank through the first water distribution pipe 14 for filtration treatment and discharge after meeting the standard.

[0032] The working method of the controller 24 is as follows: the solenoid valve 23 is in a closed state under normal circumstances, and the sewage supernatant of the initial sedimentation unit flows into the water purification unit through the first water distribution pipe 14 for purification and discharge after reaching the standard; multiple humidity sensors are installed in the soil of the small vegetable garden 21 and the green belt 22 to obtain the moisture value of the soil , through the formula Get the water content value , and obtain real-time temperature values ​​from the Meteorological Bureau And light intensity , through the formula Determine the coefficient When the judgment coefficient is greater than 1, the solenoid valve 23 is opened, and the sewage supernatant preferentially flows into the resource recycling pool 17 through the second water distribution pipe 16. In the formula, as well as is the weight coefficient, is the mean soil moisture value, The highest moisture value, is the number of sensors whose moisture values ​​exceed the average moisture value among all humidity sensors, for The moisture value obtained by the i-th sensor among the sensors, and , is the temperature control value, is the light intensity control value, is the judgment threshold.

[0033] The above technical solution provides a method for the controller 24 to control the electromagnetic valve 23 to open. Generally, the most intuitive expression of the need for watering can be the soil moisture content. The lower the moisture content, the more accurate the explanation. Therefore, multiple humidity sensors are installed in the soil to obtain the soil moisture value. , through the formula Get the water content value , where as well as is the weight coefficient, and its value is determined according to the actual soil conditions, but the values ​​of both are always 1. For example, , , is the mean soil moisture value, The highest moisture value, is the number of sensors whose moisture values ​​exceed the average moisture value among all humidity sensors, for The moisture value obtained by the i-th sensor among the sensors is analyzed by the average moisture value detected by all sensors and the maximum moisture value here, which can better reflect the moisture content of the entire area. It indicates that the water content of the whole area is out of tolerance relative to the average value. If the value is larger, it means that the water content is higher. Therefore, when the water content value is The larger the value, the better the water content, and the more serious the water shortage. The water shortage is not only related to soil moisture but also to temperature, light intensity, etc. The higher the temperature and the greater the light intensity, the greater the evaporation of water. Therefore, after obtaining the water content value, the real-time temperature value is obtained from the Meteorological Bureau. And light intensity After standardizing these data, the formula Determine the coefficient , where is the temperature control value, is the light intensity control value, To judge the threshold value, it can be determined according to the control experimental data. It can be seen that when the judgment coefficient is greater than 1, it means that the soil moisture content is low, the temperature is high, and the light is strong, which means that the soil is in a water-deficient state and needs to be glued. At this time, the solenoid valve 23 is opened, and the sewage supernatant preferentially flows into the resource recycling pool 17 through the second water distribution pipe 16 to realize the watering operation.

[0034] The controller 24 is also used to analyze the acquired information to determine the duration of drip irrigation. The working method is as follows: when the solenoid valve 23 is opened, the average temperature of the next day is obtained from the meteorological bureau. ,humidity , light intensity and rainfall , calculate the drip irrigation duration , the drip irrigation duration expression is: ; In the formula, is the influence coefficient, is the drip irrigation area, The flow rate of the drip irrigation head.

[0035] The above scheme provides a specific method for the controller 24 to determine the duration of drip irrigation. First, the average temperature of the next day is obtained from the meteorological bureau. ,humidity , light intensity and rainfall , after standardization, the drip irrigation duration is calculated , the drip irrigation duration expression is: , where is the influence coefficient, is the drip irrigation area, is the flow rate of the drip irrigation head. From the formula, it can be seen that the larger the value, the more serious the water shortage, and the longer the drip irrigation time will be. The larger the drip irrigation time, the longer the drip irrigation time. Indicates the impact of future weather on watering. The larger the value, the longer the watering time. It is an influence coefficient, which can be manually formulated according to the actual situation, for example, it can be formulated after comprehensive consideration of factors such as the soil conditions in the drip irrigation area, the type of crop and the growth stage. In this way, the drip irrigation duration can be accurately calculated based on the shortage situation and future weather conditions, so as to ensure that sewage accurately supplies water and fertilizer according to crop needs, which is beneficial to crop growth.

[0036] It should be noted that the above calculation formulas are dimensionless calculations performed after the data is standardized and specific units are selected. The processing method can be obtained through existing technologies and will not be described in detail here.

[0037] The above contents are merely examples and explanations of the concept of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A system for treating and reusing domestic sewage in rural areas, characterized in that: The system comprises: An initial sedimentation unit, which is used to precipitate the centrally collected domestic sewage to obtain sewage supernatant after initial sedimentation; A water purification unit, wherein the water purification unit filters the sewage supernatant by using a composite ecological filtration technology; A drip irrigation reuse unit, which is used to transport the sewage supernatant to a small vegetable garden or a green belt for watering and fertilizing for reuse; An information collection unit, wherein the information collection unit obtains parameter information related to the sewage drip irrigation reuse through the Internet of Things technology; An intelligent control unit is used to analyze the acquired parameter information, thereby transporting the sewage supernatant to a water purification unit or a drip irrigation reuse unit.

2. A rural domestic sewage treatment and reuse system according to claim 1, characterized in that: The water purification unit comprises a sedimentation tank (3), an integrated water inlet pipe (2) is installed on the sedimentation tank (3), the integrated water inlet pipe (2) is connected to the drainage pipes of multiple households (1), a water distribution tank (5) is also provided on one side of the sedimentation tank (3), and an overflow weir (4) is provided between the water distribution tank (5) and the sedimentation tank (3).

3. A rural domestic sewage treatment and reuse system according to claim 2, characterized in that: The water purification unit comprises a volcanic rock filter (6), a zeolite filter (8) is provided on one side of the volcanic rock filter (6), a ceramsite filter (10) is provided on one side of the zeolite filter (8), a clean water tank (12) is provided on one side of the ceramsite filter (10), and a water outlet pipe (13) is installed on the clean water tank (12).

4. A rural domestic sewage treatment and reuse system according to claim 3, characterized in that: The volcanic rock filter (6), zeolite filter (8) and ceramsite filter (10) are respectively provided with a plurality of volcanic rocks (7), zeolites (9) and ceramsite (11), wherein the particle size of the volcanic rock (7) is 5-8 cm, the particle size of the zeolite (9) is 3-5 cm, and the particle size of the ceramsite (11) is 1-3 cm. The volcanic rock filter (6), zeolite filter (8) and ceramsite filter (10) are connected by water pipes (15), and the water pipes (15) are discharged in an up-and-down staggered manner at the water inlet and outlet of each filter.

5. A rural domestic sewage treatment and reuse system according to claim 4, characterized in that: The drip irrigation reuse unit comprises a resource reuse pool (17), a water pump (18) is installed at the resource reuse pool (17), the water pump (18) is connected to a drip irrigation pipe (20) via a reuse pipe (19), and the drip irrigation pipe (20) is used to transport the treated wastewater to a small vegetable garden (21) and a green belt (22) for watering and fertilizing.

6. A rural domestic sewage treatment and reuse system according to claim 5, characterized in that: The water distribution pool (5) is also provided with a first water distribution pipe (14) and a second water distribution pipe (16); the first water distribution pipe (14) is connected to the volcanic rock filter pool (6); the second water distribution pipe (16) is connected to the resource recycling pool (17); and the installation height of the second water distribution pipe (16) is 20 cm lower than that of the first water distribution pipe (14).

7. A rural domestic sewage treatment and reuse system according to claim 6, characterized in that: The intelligent control unit comprises a controller (24) and a solenoid valve (23); the solenoid valve (23) is installed on the second water distribution pipe (16); the controller (24) is used to analyze the acquired information, thereby controlling the opening of the solenoid valve (23).

8. A rural domestic sewage treatment and reuse system according to claim 7, characterized in that: The working method of the controller (24) is: The solenoid valve (23) is normally in a closed state, and the sewage supernatant of the initial sedimentation unit flows into the water purification unit through the first water distribution pipe (14) for purification and is discharged after meeting the standards; Install multiple moisture sensors in the soil of the vegetable garden (21) and the green belt (22) to obtain the moisture value of the soil , through the formula Get the water content value , and obtain real-time temperature values ​​from the Meteorological Bureau And light intensity , through the formula Determine the coefficient When the judgment coefficient is greater than 1, the solenoid valve (23) is opened, and the sewage supernatant preferentially flows into the resource recycling pool (17) through the second water distribution pipe (16); In the formula, as well as is the weight coefficient, is the mean soil moisture value, The highest moisture value, is the number of sensors whose moisture values ​​exceed the average moisture value among all humidity sensors, for The moisture value obtained by the i-th sensor among the sensors, and , is the temperature control value, is the light intensity control value, is the judgment threshold.

9. A rural domestic sewage treatment and reuse system according to claim 8, characterized in that: The controller (24) is also used to analyze the acquired information to determine the duration of drip irrigation, and its working method is as follows: When the solenoid valve (23) is opened, the average temperature for the next day is obtained from the weather bureau. ,humidity , light intensity and rainfall , calculate the drip irrigation duration , the drip irrigation duration expression is: ; In the formula, is the influence coefficient, is the drip irrigation area, The flow rate of the drip irrigation head.

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