Rural domestic sewage treatment system

Abstract

The invention provides a rural domestic sewage treatment system. The rural domestic sewage treatment system comprises an ecological purification pond (102), a water pump (103) and a biochar filter tank (104), the ecological purification pond (102) is used for receiving rural domestic sewage discharged from the domestic sewage discharge port (101) and ecologically purifying the stored sewage. The ecological purification pond (102) is communicated with a water inlet of the biochar filter tank (104), and the water pump (103) is located at the water inlet of the biochar filter tank (104) and used for pumping pond water stored in the ecological purification pond (102) into the biochar filter tank (104) through the water pump (103). And the biochar filter tank (104) is used for purifying sewage through a biochar filter material (203) prepared based on rice field straws and discharging the purified sewage into the rice field. According to the system, the rural domestic sewage can be subjected to multi-stage purification treatment, and the treated sewage is reused for rice field irrigation, so that the cyclic utilization of water resources is realized, and the economical efficiency and practicability of rural domestic sewage treatment are improved.

Description

Technical Field

[0001] The present application relates to the technical field of rural domestic sewage treatment, and in particular to a rural domestic sewage treatment system. Background Art

[0002] With the rapid development of rural economy and society and the acceleration of urban-rural integration, the rural environment is facing a very serious situation. Rural domestic sewage is directly discharged without treatment, which seriously pollutes the living environment and water bodies of residents. Domestic sewage may contain heavy metals. After being absorbed by plants, these heavy metals will enter the food chain and eventually affect human health.

[0003] Traditional rural domestic sewage treatment methods, such as centralized sewage treatment systems, often require high construction and maintenance costs, which makes them more suitable for use in economically developed areas. However, for most rural areas, due to the relatively weak economic foundation, such treatment methods are neither economical nor practical, and therefore difficult to promote widely. In addition, traditional methods may also face problems such as poor technical adaptability and difficult management and maintenance, further limiting their popularity in rural areas. Therefore, exploring new sewage treatment technologies that are low-cost, easy to maintain and adaptable to the rural environment has become an urgent need to promote rural sewage treatment and improve the rural water environment.

[0004] Rural villagers usually discharge rural domestic sewage directly into rice fields, but rural domestic sewage may contain heavy metals, pathogens, etc., which may affect the healthy growth of rice. Traditional rice field disposal technology cannot treat rural domestic sewage. Summary of the invention

[0005] The present application provides a rural domestic sewage treatment system to solve the problems that the existing rural domestic sewage treatment is uneconomical, has high construction costs, and the rural domestic sewage is directly discharged into the rice fields, causing excessive damage to the rice fields.

[0006] In a first aspect, the present application provides a rural domestic sewage treatment system, the system comprising: an ecological purification pond 102, a water pump 103 and a biochar filter 104;

[0007] The ecological purification pond 102 is used to receive rural domestic sewage discharged from the domestic sewage outlet 101 and to perform ecological purification on the water stored in the pond;

[0008] The ecological purification pond 102 is connected to the water inlet of the biochar filter 104, and the water pump 103 is located at the water inlet of the biochar filter 104, and is used to pump the pond water stored in the ecological purification pond 102 into the biochar filter 104 through the water pump 103;

[0009] The biochar filter 104 is used to purify the sewage through the biochar filter material 203 made from rice straw, and discharge the purified sewage into the rice field.

[0010] In a possible implementation, the biochar filter 104 includes: a water distribution device 201, a water tank body 202, a biochar filter material 203, a supporting structure 204, a drainage tank 205 and a water outlet 206;

[0011] The supporting structure 204 is disposed in the pool body 202 and fixedly connected to the pool wall of the pool body 202, so that the portion of the pool body 202 located below the supporting structure 204 constitutes a drainage pool 205;

[0012] The biochar filter material 203 is arranged on the supporting structure 204, and the water distribution device 201 is arranged above the pool body 202 and connected to the water pump 103, and is used to evenly spray the sewage transported by the water pump 103 into the biochar filter material 203;

[0013] The supporting structure 204 is provided with a plurality of drainage channels for discharging the sewage purified by the biochar filter material 203 into the drainage pool 205;

[0014] The water outlet 206 is disposed on one side of the pool body 202 and is connected to the drainage pool 205 for discharging the purified sewage into the rice field.

[0015] In a possible implementation, the system further includes: a water gate 108;

[0016] The sluice gate 108 is disposed between the ecological purification pond 102 and the drainage channel, and is used to discharge the water in the ecological purification pond 102 into the drainage channel.

[0017] In a possible implementation, the water gate 108 includes: a water gate body 301, a gate rod 302, a gate 303 and a control device 304;

[0018] The interior of the water gate body 301 is hollow, and the gate 303 is located inside the water gate body 301 and fits with the inner wall of the water gate body 301;

[0019] A through hole is provided on the top of the water gate body 301, and the gate rod 302 passes through the through hole and is connected to the gate 303;

[0020] The control device 304 is disposed on the outer wall of the sluice body 301 and is used to control the gate rod 302 to drive the gate 303 to move up and down.

[0021] In a possible implementation, the water gate 108 further includes: a data transmission line 305 and a water level sensor 306;

[0022] The control device 304 is connected to the water level sensor 306 located in the ecological purification pond 102 through the data transmission line 305;

[0023] The control device 304 is specifically used for:

[0024] Obtaining the water level of the ecological purification pond detected by the water level sensor 306;

[0025] When the water level of the ecological purification pond 102 is higher than the safety water level, the gate rod 302 is controlled to drive the gate 303 to move upward, so that the water in the ecological purification pond 102 is discharged into the drainage channel;

[0026] When the water level of the ecological purification pond 102 is lower than or equal to the lowest water level, the gate rod 302 is controlled to drive the gate 303 to move downward to stop discharging the water in the ecological purification pond 102 .

[0027] In a possible implementation, the water gate 108 further includes: a water quality sensor 307, and the control device 304 is connected to the water quality sensor 307 located in the ecological purification pond 102 through the data transmission line 305;

[0028] The control device 304 is further used for:

[0029] Obtaining the water quality of the ecological purification pond detected by the water quality sensor 307;

[0030] When the water quality of the ecological purification pond 102 meets the discharge requirements, the gate rod 302 is controlled to drive the gate 303 to move upward, so that the water in the ecological purification pond 102 is discharged into the drainage channel.

[0031] In a possible implementation, the system further includes: a rice field drainage outlet 107 , which is connected to the rice field and the ecological purification pond 102 respectively, and is used to discharge the remaining sewage after rice field irrigation into the ecological purification pond 102 .

[0032] In a second aspect, the present application provides a method for treating rural domestic sewage, comprising:

[0033] The ecological purification pond receives rural domestic sewage discharged from the domestic sewage outlet and performs ecological purification on the stored water in the pond;

[0034] The ecological purification pond pumps the water stored in the ecological purification pond into the biochar filter tank through a water pump;

[0035] The biochar filter purifies the sewage by using biochar filter material made from rice field straw, and discharges the purified sewage into the rice field.

[0036] Optionally, the system further comprises: a sluice gate, and the method further comprises:

[0037] The sluice gate obtains the water level of the ecological purification pond detected by the water level sensor;

[0038] When the water level in the ecological purification pond is higher than the safety water level, the sluice gate controls the gate rod to drive the gate to move upward, so that the water in the ecological purification pond is discharged into the drainage channel;

[0039] When the water level in the ecological purification pond is lower than or equal to the lowest water level, the sluice gate controls the gate rod to drive the gate to move downward to stop discharging the pond water in the ecological purification pond.

[0040] Optionally, the method further includes:

[0041] The sluice gate obtains the water quality of the ecological purification pond detected by the water quality sensor;

[0042] When the water quality of the ecological purification pond meets the discharge requirements, the sluice gate controls the gate rod to drive the gate to move upward, so that the water in the ecological purification pond is discharged into the drainage channel.

[0043] The present application provides a rural domestic sewage treatment system, including: an ecological purification pond 102, a water pump 103 and a biochar filter 104. The ecological purification pond 102 is used to receive rural domestic sewage discharged from the domestic sewage outlet 101, and to perform ecological purification on the stored pond water. The ecological purification pond 102 is connected to the water inlet of the biochar filter 104, and the water pump 103 is located at the water inlet of the biochar filter 104, and is used to pump the pond water stored in the ecological purification pond 102 into the biochar filter 104 through the water pump 103. The biochar filter 104 is used to purify sewage through biochar filter material 203 made from rice straw, and discharge the purified sewage into the rice field. The system can perform multi-stage purification treatment on rural domestic sewage, and reuse the purified rural domestic sewage for rice field irrigation, which reduces environmental pollution while realizing the recycling of water resources and reducing dependence on fresh water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0045] Figure 1A schematic diagram of a use scenario of a rural domestic sewage treatment system provided for this application;

[0046] Figure 2 A schematic diagram of the structure of a rural domestic sewage treatment system provided for this application;

[0047] Figure 3 A schematic diagram of the structure of a biochar filter in a rural domestic sewage treatment system provided in this application;

[0048] Figure 4 A schematic diagram of the structure of a sluice in a rural domestic sewage treatment system provided in this application.

[0049] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments.

[0050] Description of reference numerals:

[0051] 101-domestic sewage outlet; 102-ecological purification pond; 103-water pump; 104-biochar filter; 105-rice field; 106-drainage channel; 107-rice field drainage outlet; 108-gate;

[0052] 201-water distribution device; 202-water pool body; 203-biochar filter material; 204-supporting structure; 205-drainage pool; 206-water outlet;

[0053] 301-sluice body; 302-gate rod; 303-gate; 304-control device; 305-data transmission line; 306-water level sensor; 307-water quality sensor. DETAILED DESCRIPTION

[0054] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation methods described in the following exemplary embodiments do not represent all implementation methods consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims, rather than all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0055] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, products or devices.

[0056] In the embodiments of the present application, the words "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0057] With the booming rural economy and the accelerated pace of urban-rural integration, the rural environment is facing severe challenges. The direct discharge of untreated domestic sewage in rural areas not only deteriorates the living space of residents, but also seriously pollutes water sources. The heavy metal components hidden in such sewage, once absorbed by crops, will be transmitted along the food chain, ultimately endangering human health.

[0058] The traditional centralized sewage treatment model is effective but costly and complex to maintain, making it more suitable for economically developed areas. In contrast, most rural areas have weak economic foundations and cannot afford such a burden, so the promotion of traditional methods is limited. In addition, the poor technical matching and the difficulties in post-management and maintenance have further hindered its widespread application in rural areas. Therefore, new sewage treatment technologies with low R&D costs, simple maintenance and compatible with the rural environment have become a top priority for solving rural sewage problems and improving rural water quality.

[0059] It is worth noting that rural residents are accustomed to discharging domestic sewage directly into rice fields. However, the heavy metals, pathogens and other harmful substances that may be contained in the sewage pose a potential threat to rice growth. The natural purification capacity of traditional rice fields is powerless to this, highlighting the urgency of upgrading sewage treatment technology.

[0060] In response to the above problems, this application proposes a rural domestic sewage treatment system, which includes an ecological purification pond, a water pump and a biochar filter. The ecological purification pond stores and slowly purifies rural domestic sewage. When the water pump is turned on, the sewage will be pumped into the biochar filter for filtration treatment. After treatment, the rural domestic sewage will be introduced into the rice fields for irrigation. Among them, aquatic plants with absorption and metabolic functions are planted in the ecological purification pond, and the biochar filter is filled with biochar filter materials made of rice field straw. While treating rural domestic sewage, the system also irrigates the rice fields, which not only protects the ecological environment, but also realizes the effective use of water resources.

[0061] Figure 1 This is a schematic diagram of a use scenario of a rural domestic sewage treatment system provided in an embodiment of the present application. This system can be used for domestic sewage treatment and discharge in rural areas. Figure 1 As shown, 101 is the domestic sewage outlet, 102 is the ecological purification pond, 103 is the water pump, 104 is the biochar filter, 105 is the rice field, 106 is the drainage channel, 107 is the rice field drainage outlet, and 108 is the sluice.

[0062] During use, rural villagers discharge domestic sewage into the ecological purification pond 102 through the domestic sewage discharge port 101. The ecological purification pond 102 can temporarily store domestic sewage. When the water pump 103 is turned on, the water pump 103 can pump the domestic sewage into the biochar filter 104. The domestic sewage filtered by the biochar filter 104 can be used for irrigation of the rice field 105. After the irrigation of the rice field 105 is completed, the remaining water can be returned to the ecological purification pond 102 through the rice field drain outlet 107. In addition, the sluice 108 can detect the water quality and water level in the ecological purification pond 102, and discharge the sewage in the ecological purification pond 102 according to the preset conditions to prevent dangerous accidents caused by excessive domestic sewage in the ecological purification pond 102.

[0063] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0064] Figure 2 A schematic diagram of a rural domestic sewage treatment system provided in an embodiment of the present application is shown in FIG. Figure 1 and Figure 2 As shown, the rural domestic sewage treatment system provided in the embodiment of the present application includes: an ecological purification pond 102, a water pump 103 and a biochar filter 104;

[0065] The ecological purification pond 102 is used to receive the domestic sewage discharged from the domestic sewage outlet 101 and to perform ecological purification on the stored domestic sewage.

[0066] It should be noted that before rural domestic sewage enters the ecological purification pond through the rural domestic sewage discharge port, it is necessary to pre-treat the rural domestic sewage. Rural domestic sewage can generally be divided into two categories, namely black water and gray water. Among them, gray water is low-concentration domestic sewage such as kitchen water, laundry and bathing water, and black water is feces and toilet flushing sewage discharged from the toilet. When rural domestic sewage is discharged, it will enter the ecological purification pond through different pipes. The collected gray water can be directly discharged into the ecological purification pond, and the collected black water is pre-treated in a three-chamber septic tank and then discharged into the ecological purification pond.

[0067] Black water is usually pretreated in a three-chamber septic tank. The specific process is as follows: the black water first enters the first chamber and is treated by anaerobic fermentation. In this process, the organic matter in the black water is decomposed under anaerobic conditions to produce usable resources such as biogas. Subsequently, the black water enters the second chamber for sedimentation and filtration to remove solid particles and impurities, further purifying the water quality. Finally, the black water enters the third chamber for fermentation and sterilization again. Anaerobic fermentation basically kills and removes pathogens and insect eggs, ensuring that the treated water quality meets safety standards.

[0068] Ecological purification ponds can be used to purify rural domestic sewage initially because aquatic plants such as lotus roots, calamus and cattails are planted in ecological purification ponds. Through their absorption and metabolism, organic matter, inorganic matter and nutrients in the water can be removed or converted into harmless substances, thereby improving the transparency and oxygen content of the water. At the same time, aerators or air pumps and artificial oxygenation equipment can be used to fully dissolve oxygen into the water, increase the dissolved oxygen content of the water, improve the water environment, and promote the growth and metabolism of aquatic organisms.

[0069] The ecological purification pond 102 is connected to the water inlet of the biochar filter 104 . The water pump 103 is located at the water inlet of the biochar filter 104 and is used to pump the domestic sewage stored in the ecological purification pond 102 into the biochar filter 104 through the water pump 103 .

[0070] When the rice field needs irrigation, the water in the pond will be pumped by a water pump, and then purified by the biochar filter to irrigate the farmland. The water pump can be, for example, an intelligent water pump with a timed opening and closing function. The opening and closing time of the water pump can be set according to whether the rice field is in the irrigation period, the rice variety planted in the rice field, or the needs of other plants.

[0071] The biochar filter 104 is used to purify domestic sewage using biochar filter material 203 made from rice straw, and discharge the purified domestic sewage into the rice field.

[0072] There may be heavy metals and pathogens in rural domestic sewage, which may affect the healthy growth of rice. Therefore, before rural domestic sewage is discharged into rice fields, it is first discharged into biochar filters. Biochar filter materials made from rice field straw can effectively absorb organic pollutants, heavy metals and other harmful substances in sewage. The specific production process of biochar filter materials is detailed below and will not be repeated here.

[0073] A rural domestic sewage treatment system provided in an embodiment of the present application includes: an ecological purification pond, a water pump and a biochar filter. The ecological purification pond is used to receive rural domestic sewage discharged from the domestic sewage outlet, and to perform ecological purification on the stored pond water. The ecological purification pond is connected to the water inlet of the biochar filter, and the water pump is located at the water inlet of the biochar filter, and is used to pump the pond water stored in the ecological purification pond into the biochar filter through the water pump. The biochar filter is used to purify sewage through biochar filter materials made from rice straw, and discharge the purified sewage into the rice field. The system can perform multi-stage purification treatment on rural domestic sewage, and use the purified rural domestic sewage for rice field irrigation, which reduces environmental pollution while realizing the recycling of water resources and reducing dependence on fresh water resources.

[0074] In some embodiments, Figure 3 A schematic diagram of the structure of a biochar filter in a rural domestic sewage treatment system provided in an embodiment of the present application is shown in FIG. Figure 3 As shown, the biochar filter 104 includes: a water distribution device 201, a water tank body 202, a biochar filter material 203, a supporting structure 204, a drainage tank 205 and a water outlet 206;

[0075] The supporting structure 204 is disposed in the pool body 202 and fixedly connected to the pool wall of the pool body 202 , so that the portion of the pool body 202 located below the supporting structure 204 constitutes a drainage pool 205 .

[0076] During use, the supporting structure is located in the middle of the pool body, and is mainly used to place the biochar filter material in the filter tank and prevent the biochar filter material from being lost with the water flow. The supporting structure can be made of corrosion-resistant steel or high-strength plastic, which has good mechanical strength and durability. The supporting structure is usually firmly connected to the pool wall of the pool body by welding or bolting to ensure the stability and reliability of the supporting structure. The supporting structure can divide the filter tank into two parts. The upper part is used to place the filter material and filter the sewage. The lower part is a drainage pool, which can be used to store water purified by the filter material layer to ensure the uniform distribution and smooth discharge of the water flow.

[0077] The biochar filter material 203 is arranged on the supporting structure 204 , and the water distribution device 201 is arranged above the pool body 202 and connected to the water pump 103 for uniformly spraying the domestic sewage transported by the water pump 103 into the biochar filter material 203 .

[0078] Among them, the biochar filter material is prepared with rice straw as raw material. The rice straw is cleaned and pretreated, and the pretreated rice straw is dried and crushed; the crushed rice straw is pyrolyzed and carbonized to obtain biochar; the biochar is cooled and screened to obtain the biochar filter material. Because biochar is porous, it can be used as an effective adsorbent to remove suspended solids, pathogens and other substances in water that affect rice growth. At the same time, after a period of time, the biochar filter material can be used as a high-quality fertilizer and returned to the rice field to fertilize the rice field plants, forming a recycling of rice straw.

[0079] Biochar filter material is a renewable material with a relatively simple preparation process and low cost. It is suitable for promotion and application in rural areas, reducing the economic cost of sewage treatment. The use of agricultural waste (such as rice straw) to prepare biochar realizes the resource utilization of waste and reduces environmental pollution.

[0080] A water distribution device is arranged above the water pool body. There is a water inlet in the water distribution device, and the water inlet is connected to a water pump. The water pump can pump sewage into the water inlet. There is a water distribution pipe below the water inlet. The water distribution pipe can spray the sewage entering the water inlet so that the sewage is evenly distributed in the biochar filter material.

[0081] The supporting structure 204 is provided with a plurality of drainage channels for discharging the domestic sewage purified by the biochar filter material 203 into the drainage pool 205 .

[0082] Multiple drainage channels can be set in the supporting structure to discharge the filtered sewage into the drainage pool. The supporting structure can also be set as a grid-like bracket structure, which can not only effectively support the filter material layer, but also allow the water flow to be evenly distributed, thereby preventing uneven water flow distribution in the drainage pool and untimely drainage.

[0083] The water outlet 206 is disposed on one side of the pool body 202 and is connected to the drainage pool 205 for discharging the purified domestic sewage into the rice field.

[0084] During use, the water outlet is usually below the biochar filter tank. The water outlet can be a pipe connecting the drainage tank and the rice field, or a through hole between the drainage tank and the rice field. It is mainly used to discharge sewage filtered by the biochar filter material into the rice field to irrigate the rice field.

[0085] In some embodiments, Figure 1 and Figure 2 As shown, the system further includes: a sluice gate 108;

[0086] The sluice gate 108 is disposed between the ecological purification pond 102 and the drainage channel, and is used to discharge the domestic sewage in the ecological purification pond 102 into the drainage channel.

[0087] During use, the sluice gate is set between the ecological purification pond and the drainage channel to ensure that the purified domestic sewage can be discharged smoothly into the drainage channel. The sluice gate can be firmly connected to the structure of the ecological purification pond and the drainage channel through embedded bolts and concrete foundation to ensure its stability under the impact of water flow. The setting of the sluice gate can ensure that the water volume in the ecological purification pond is in a stable state. When the water level is too high, the sluice gate can be opened in time to discharge domestic sewage.

[0088] In some embodiments, Figure 4 A schematic diagram of the structure of a sluice in a rural domestic sewage treatment system provided in an embodiment of the present application is shown in FIG. Figure 4 As shown, the water gate 108 includes: a water gate body 301, a gate rod 302, a gate 303 and a control device 304;

[0089] The interior of the water gate body 301 is hollow, and the gate 303 is located inside the water gate body 301 and fits with the inner wall of the water gate body 301;

[0090] In use, the size of the sluice gate is usually designed according to actual needs, such as the amount of water discharged and the time limit for discharge. The sluice gate is usually rectangular or cylindrical with a smooth inner wall to ensure that the gate can be raised and lowered smoothly. The gate fits tightly against the inner wall of the sluice gate body, and the sealing effect can be further enhanced by sealing strips or rubber gaskets to prevent water from leaking through the gap.

[0091] A through hole is provided on the top of the sluice body 301 , and the gate rod 302 passes through the through hole and is connected to the gate 303 .

[0092] During use, a through hole is provided on the top of the sluice body, and the diameter of the through hole is slightly larger than the diameter of the gate rod, ensuring that the gate rod can pass through smoothly while preventing water leakage.

[0093] The control device 304 is disposed on the outer wall of the sluice body 301 and is used to control the gate rod 302 to drive the gate 303 to move up and down.

[0094] During use, the control device is set on the outer wall of the sluice body for easy operation and maintenance. The control device can have a variety of control types, for example, it can include an electric gate hoist, a manual control panel and an automatic control system to achieve precise control of the gate rod and the gate. For example: the gate rod can be driven up and down by an electric motor to control the opening and closing of the gate. A control panel can also be set, and the operator can operate the gate through the manual control panel when necessary. It can also be equipped with sensors to monitor the water level and water quality in real time, and automatically adjust the opening of the gate according to the preset control parameters.

[0095] In some embodiments, Figure 3 As shown, the water gate 108 also includes: a data transmission line 305 and a water level sensor 306;

[0096] The control device 304 is connected to the water level sensor 306 located in the ecological purification pond 102 via a data transmission line 305;

[0097] During use, the control device is connected to the water level sensor through a data transmission line. The water level sensor can adopt an ultrasonic water level sensor or a pressure water level sensor, which has high detection precision and accuracy. The water level sensor is placed in the sewage in the ecological purification pond and can monitor the water level in real time. The opening and closing of the sluice gate can be adjusted in time according to the water level changes to ensure the water storage safety of the ecological purification pond.

[0098] The control device 304 is specifically used for:

[0099] Obtaining the water level of the ecological purification pond detected by the water level sensor 306;

[0100] When the water level of the ecological purification pond 102 is higher than the safety water level, the gate rod 302 is controlled to drive the gate 303 to move upward, so that the domestic sewage in the ecological purification pond 102 is discharged into the drainage channel;

[0101] When the water level of the ecological purification pond 102 is lower than or equal to the lowest water level, the gate rod 302 is controlled to drive the gate 303 to move downward to stop discharging the pond water in the ecological purification pond 102 .

[0102] During use, the water level sensor monitors the water level of the ecological purification pond in real time and transmits the data to the control device. After receiving the water level data, the control device processes and analyzes the data to determine whether the current water level is higher than the safe water level or lower than the minimum water level. If the water level of the ecological purification pond is higher than the safe water level, the control device will trigger the drainage operation. The electric hoist is started to drive the gate rod to move upward, drive the gate to rise, and open the sluice gate. The domestic sewage in the ecological purification pond is discharged into the drainage channel through the sluice body, lowering the water level in the pond.

[0103] If the water level in the ecological purification pond is lower than or equal to the minimum water level, the control device will trigger the stop drainage operation. The electric gate hoist will be started to drive the gate rod to move downward, drive the gate to drop, close the sluice gate, stop the discharge of domestic sewage in the ecological purification pond, maintain the water volume in the pond, and ensure the normal progress of the purification process.

[0104] Optionally, the control device can also be connected to a weather forecasting device. When it is predicted that the rainfall in the future period will be too heavy and will cause the water in the ecological purification pond to exceed the safe water level line, the gate rod can be driven upward in advance to drive the gate to rise, open the sluice gate, and discharge the water in the pond, so that the water level in the ecological purification pond is always maintained below the safe water level line.

[0105] In some embodiments, Figure 3 As shown, the sluice gate 108 further includes: a water quality sensor 307, and the control device 304 is connected to the water quality sensor 307 located in the ecological purification pond 102 via a data transmission line 305;

[0106] During use, the control device is connected to a water quality sensor through a data transmission line. The water level sensor can be a multi-parameter water quality sensor. The water quality sensor is placed in the sewage in the ecological purification pond and can monitor the water quality in real time. When the water quality is qualified but the water level has not reached the highest water level, the sluice gate is opened to ensure the normal purification process of the sewage treatment system.

[0107] The control device 304 is further used for:

[0108] Obtaining the water quality of the ecological purification pond detected by the water quality sensor 307;

[0109] When the water quality of the ecological purification pond 102 meets the discharge requirements, the gate rod 302 is controlled to drive the gate 303 to move upward, so that the domestic sewage in the ecological purification pond 102 is discharged into the drainage channel.

[0110] During use, the water quality sensor regularly monitors the water quality of the ecological purification pond and transmits the data to the control device. After receiving the water quality data, the control device processes and analyzes the data. When the water quality meets the standard and the water level is higher than the minimum water level line, the control device will trigger the drainage operation. Start the electric gate hoist, drive the gate rod to move upward, drive the gate to rise, and open the sluice gate. The domestic sewage in the ecological purification pond is discharged into the drainage channel through the sluice body to lower the water level in the pond. In the case of repeated water quality monitoring failures, the ecological purification pond and biochar filter tank in the rural domestic sewage treatment system are inspected, the biochar filter material is replaced or other reasons are found to ensure that the rural domestic sewage treatment system can treat domestic sewage normally.

[0111] In some embodiments, Figure 1 and Figure 2As shown, the system further includes: a rice field drainage outlet 107 , which is connected to the rice field and the ecological purification pond 102 respectively, and is used to discharge the remaining sewage after rice field irrigation into the ecological purification pond 102 .

[0112] It is understandable that while domestic sewage is irrigating rice fields, the rice fields will also absorb and treat the domestic sewage. The treated domestic sewage can flow back to the ecological purification pond through the rice field drainage outlet for the next rice field irrigation or be discharged into the drainage ditch.

[0113] Paddy fields can effectively purify pollutants such as nitrogen and phosphorus in sewage through rice absorption, soil adsorption and interception, and microbial fixation and degradation. The main principles of paddy field sewage treatment are: Rice absorption: As an aquatic plant, rice has a significant absorption capacity for nutrients such as nitrogen and phosphorus. These elements are necessary for rice growth. When sewage is used as an irrigation water source, rice will naturally absorb nitrogen and phosphorus, which not only promotes its own growth, but also reduces the content of pollutants in the water body; Soil adsorption and interception: Paddy field soil has a strong adsorption and fixation effect on pollutants such as nitrogen and phosphorus. The soil can intercept and fix some pollutants to prevent them from being lost with water; Microbial degradation: There are rich microbial communities in the paddy field system (that is, the biological system in the paddy field). These microorganisms absorb and convert phosphorus in sewage into cell components through normal life activities, such as assimilation and excessive accumulation, thereby reducing the phosphorus content in the water body. At the same time, microorganisms can also participate in nitrogen conversion processes, such as nitrification and denitrification, which helps to remove nitrogen from the water body.

[0114] The present application also provides a method for treating rural domestic sewage, which comprises the following steps:

[0115] The ecological purification pond receives rural domestic sewage discharged from the domestic sewage outlet and performs ecological purification on the stored water in the pond;

[0116] The ecological purification pond pumps the water stored in the ecological purification pond into the biochar filter tank through a water pump;

[0117] The biochar filter purifies the sewage by using biochar filter material made from rice field straw, and discharges the purified sewage into the rice field.

[0118] Optionally, the system further comprises: a sluice gate, and the method further comprises:

[0119] The sluice gate obtains the water level of the ecological purification pond detected by the water level sensor;

[0120] When the water level in the ecological purification pond is higher than the safety water level, the sluice gate controls the gate rod to drive the gate to move upward, so that the water in the ecological purification pond is discharged into the drainage channel;

[0121] When the water level in the ecological purification pond is lower than or equal to the lowest water level, the sluice gate controls the gate rod to drive the gate to move downward to stop discharging the pond water in the ecological purification pond.

[0122] Optionally, the method further includes:

[0123] The sluice gate obtains the water quality of the ecological purification pond detected by the water quality sensor;

[0124] When the water quality of the ecological purification pond meets the discharge requirements, the sluice gate controls the gate rod to drive the gate to move upward, so that the water in the ecological purification pond is discharged into the drainage channel.

[0125] The rural domestic sewage treatment method provided in the embodiment of the present application has an implementation principle and technical effects similar to the implementation methods of the various parts in the aforementioned rural domestic sewage treatment system, which will not be repeated here.

[0126] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments, and the above embodiments are only used to illustrate the technical solution of the present application rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0127] Those skilled in the art will readily appreciate other embodiments of the present application after considering the description and practicing the contents disclosed herein. The present application is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary technical means in the art that are not disclosed in the present application. The description and embodiments are only considered as exemplary, and the scope of the present application is limited only by the appended claims.

Claims

1. A rural domestic sewage treatment system, characterized in that: The system comprises: an ecological purification pond (102), a water pump (103) and a biochar filter (104); The ecological purification pond (102) is used to receive rural domestic sewage discharged from the domestic sewage discharge port (101) and to perform ecological purification on the water stored in the pond; The ecological purification pond (102) is connected to the water inlet of the biochar filter (104); the water pump (103) is located at the water inlet of the biochar filter (104) and is used to pump the sewage stored in the ecological purification pond (102) into the biochar filter (104) through the water pump (103); The biochar filter (104) is used to purify the sewage using a biochar filter material (203) prepared based on rice straw, and discharge the purified sewage into the rice field.

2. The system according to claim 1, characterized in that The biochar filter (104) comprises: a water distribution device (201), a water tank body (202), biochar filter material (203), a supporting structure (204), a drainage tank (205) and a water outlet (206); The supporting structure (204) is arranged in the pool body (202) and is fixedly connected to the pool wall of the pool body (202), so that the portion of the pool body (202) located below the supporting structure (204) constitutes a drainage pool (205); The biochar filter material (203) is arranged on the supporting structure (204); the water distribution device (201) is arranged above the pool body (202) and is connected to the water pump (103) to evenly spray the sewage transported by the water pump (103) into the biochar filter material (203); The supporting structure (204) is provided with a plurality of drainage channels for discharging the sewage purified by the biochar filter material (203) into the drainage pool (205); The water outlet (206) is arranged on one side of the pool body (202) and is connected to the drainage pool (205) and is used to discharge the purified sewage into the rice field.

3. The system according to claim 1 or 2, characterized in that: The system further comprises: a sluice gate (108); The sluice gate (108) is arranged between the ecological purification pond (102) and the drainage channel, and is used to discharge sewage in the ecological purification pond (102) into the drainage channel.

4. The system according to claim 3, characterized in that The water gate (108) comprises: a water gate body (301), a gate rod (302), a gate (303) and a control device (304); The interior of the water gate body (301) is hollow, and the gate (303) is located inside the water gate body (301) and fits with the inner wall of the water gate body (301); A through hole is provided on the top of the water gate body (301), and the gate rod (302) passes through the through hole to be connected to the gate (303); The control device (304) is arranged on the outer wall of the water gate body (301) and is used to control the gate rod (302) to drive the gate (303) to move up and down.

5. The system according to claim 4, characterized in that The water gate (108) further comprises: a data transmission line (305) and a water level sensor (306); The control device (304) is connected to the water level sensor (306) located in the ecological purification pond (102) via the data transmission line (305); The control device (304) is specifically used to: Acquiring the water level of the ecological purification pond detected by the water level sensor (306); When the water level of the ecological purification pond (102) is higher than the safety water level line, controlling the gate rod (302) to drive the gate (303) to move upward, so that the water in the ecological purification pond (102) is discharged into the drainage channel; When the water level of the ecological purification pond (102) is lower than or equal to the lowest water level, the gate rod (302) is controlled to drive the gate (303) to move downward, so as to stop discharging the pond water in the ecological purification pond (102).

6. The system according to claim 5, characterized in that The water gate (108) further comprises: a water quality sensor (307), and the control device (304) is connected to the water quality sensor (307) located in the ecological purification pond (102) via the data transmission line (305); The control device (304) is further used for: Obtaining the water quality of the ecological purification pond detected by the water quality sensor (307); When the water quality of the ecological purification pond (102) meets the discharge requirements, the gate rod (302) is controlled to drive the gate (303) to move upward, so that the water in the ecological purification pond (102) is discharged into the drainage channel.

7. The system according to claim 1 or 2, characterized in that: The system further comprises: a rice field drainage outlet (107), wherein the rice field drainage outlet (107) is respectively connected to the rice field and the ecological purification pond (102), and is used to discharge the remaining sewage after irrigation of the rice field into the ecological purification pond (102).

8. A method for treating rural domestic sewage, characterized in that: The method is applied to a rural domestic sewage treatment system, the system comprising: an ecological purification pond, a water pump and a biochar filter, and the method comprises: The ecological purification pond receives domestic sewage discharged from the domestic sewage outlet and performs ecological purification on the water stored in the pond; The ecological purification pond pumps the water stored in the ecological purification pond into the biochar filter tank through a water pump; The biochar filter purifies sewage by using biochar filter material made from rice field straw, and discharges the purified sewage into the rice field.

9. The method according to claim 8, characterized in that The system further comprises: a sluice gate, and the method further comprises: The sluice gate obtains the water level of the ecological purification pond detected by the water level sensor; When the water level in the ecological purification pond is higher than the safety water level, the sluice gate controls the gate rod to drive the gate to move upward, so that the water in the ecological purification pond is discharged into the drainage channel; When the water level in the ecological purification pond is lower than or equal to the lowest water level, the sluice gate controls the gate rod to drive the gate to move downward to stop discharging the pond water in the ecological purification pond.

10. The method according to claim 9, characterized in that The method further comprises: The sluice gate obtains the water quality of the ecological purification pond detected by the water quality sensor; When the water quality of the ecological purification pond meets the discharge requirements, the sluice gate controls the gate rod to drive the gate to move upward, so that the water in the ecological purification pond is discharged into the drainage channel.

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