CN215208814U - Rural family domestic sewage recycling system - Google Patents

Abstract

The utility model relates to a rural family domestic sewage treatment technical field, concretely relates to rural family domestic sewage recycle system, include: the sewage treatment device comprises a sewage treatment device, a water storage tank, a water pump and a pipeline for connection; the sewage treatment device is characterized in that a sewage inlet of the sewage treatment device is connected with a household sewage drainage pipeline, a U-shaped pipe is arranged on a pipeline in front of the sewage inlet, a water outlet of the sewage treatment device is connected with a water storage tank, and a water outlet of the water storage tank is connected with a water pump. The structure is simple, economical and practical, and is suitable for rural families; meanwhile, the recycling of shower water, wash basin wastewater, laundry wastewater and the like can be enhanced, water resources are saved, and pollution is reduced.

Description

Rural family domestic sewage recycling system

Technical Field

The disclosure relates to the technical field of rural household domestic sewage treatment, in particular to a rural household domestic sewage recycling system.

Background

The domestic sewage in rural areas mainly comprises three types: kitchen sewage, washing sewage and toilet flushing water. The kitchen sewage is composed of sewage generated by washing dishes, brushing pots, washing vegetables, washing meat, washing fruits and the like, and contains grease; the washing sewage is composed of sewage generated by allied washing, bathing, clothes washing and the like; the toilet flushing water consists of excrement, urine and flushing water; the daily production of each person is most washing sewage, less flushing water and least kitchen sewage. Domestic sewage of rural families is generally directly discharged outdoors without being treated, so that water resources are wasted, and point pollution is easily caused. At present, most rural areas in China, particularly northern rural areas, have severe water shortage situations, and the high-quality recycling of water resources at low cost has important significance.

In the prior art, domestic sewage/wastewater is recycled to occasions with lower requirements on water quality, such as toilet flushing and the like. For example, an apparatus for utilizing waste water from washing as water for flushing a toilet includes: the device comprises a water collecting tank, a sewage pump, a water level controller, a wall-mounted water tank, an upper limit water level sensor of the wall-mounted water tank and a lower limit water level sensor of the wall-mounted water tank, wherein the upper limit water level sensor and the lower limit water level sensor are arranged in the wall-mounted water tank; the water collecting tank is provided with a water collecting pipe, the water collecting pipe is communicated with the wash basin, the wall-hung water tank is arranged on a wall higher than the height of the closestool, the wall-hung water tank is provided with a wall-hung water tank water inlet pipe and a flushing pipe, the wall-hung water tank water inlet pipe is communicated with a sewage pump, the sewage pump is arranged at the bottom of the water collecting tank, the flushing pipe is provided with a flushing valve, the flushing pipe is communicated with the closestool, and the wall-hung water tank upper limit water level sensor, the wall-hung water tank lower limit water level sensor and the sewage pump are respectively connected to the water level controller. The device can utilize the washing waste water as the water for flushing the toilet, thereby improving the utilization rate of water resources. However, the device only aims at the wastewater in the hand washing sink, and the treatment range is small; sewage is not treated, the water quality is too low, odor is easily generated, and bacteria can be possibly bred; in addition, the power consumption is high.

SUMMERY OF THE UTILITY MODEL

The following presents a simplified summary of the disclosure in order to provide a basic understanding of some aspects of the disclosure. It should be understood that this summary is not an exhaustive overview of the disclosure. It is not intended to identify key or critical elements of the disclosure or to delineate the scope of the disclosure. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is discussed later.

In view of the above defects in the prior art, the present disclosure aims to provide a rural domestic sewage recycling system, so as to at least solve the problems of high cost and high energy consumption of the current domestic sewage treatment system.

According to an aspect of the present disclosure, there is provided a rural domestic sewage recycling system, comprising: the sewage treatment device comprises a sewage treatment device, a water storage tank, a water pump and a pipeline for connection; the sewage treatment device is characterized in that a sewage inlet of the sewage treatment device is connected with a household sewage drainage pipeline, a U-shaped pipe is arranged on a pipeline in front of the sewage inlet, a water outlet of the sewage treatment device is connected with a water storage tank, and a water outlet of the water storage tank is connected with a water pump.

The rural household domestic sewage recycling system according to the embodiment of the disclosure has a simple structure, is economical and practical, and is suitable for rural families; meanwhile, the recycling of shower water, wash basin wastewater, laundry wastewater and the like can be enhanced, water resources are saved, and pollution is reduced; further through the use of solar cell, practice thrift the electric energy, the cost reduces.

These and other advantages of the present disclosure will become more apparent from the following detailed description of the preferred embodiments of the present disclosure when taken in conjunction with the accompanying drawings.

Drawings

The disclosure may be better understood by reference to the following description taken in conjunction with the accompanying drawings, in which like or similar reference numerals identify like or similar parts throughout the figures. The accompanying drawings, which are incorporated in and form a part of this specification, illustrate preferred embodiments of the present disclosure and, together with the detailed description, serve to explain the principles and advantages of the disclosure. Wherein:

FIG. 1 is a schematic diagram of a rural domestic sewage recycling system according to an embodiment of the present disclosure;

FIG. 2 is a schematic top view of a sewage treatment plant of a rural domestic sewage recycling system according to an embodiment of the present disclosure;

FIG. 3 is a schematic view showing a step structure of the sewage treatment apparatus shown in FIG. 2;

the reference numerals in the figures are as follows:

1-a source of domestic sewage; 2-U-shaped pipe; 3, a water storage tank; 4-a one-way valve; 5-a perforated disc; 6-a filling opening; 7-sewage treatment device, 71-quartz sand layer, 72-activated carbon layer, 73-shell, 74-upright post, 75-step, 751-baffle plate; 8-a water storage tank; 9-a photovoltaic power generation system; 10-a water pump; 11-solar water pump; 12-toilet tank.

Skilled artisans appreciate that elements, devices, and the like in the figures are illustrated for simplicity and clarity and have not necessarily been drawn to scale. For example, the dimensions of some of the elements, devices, etc. in the figures may be exaggerated relative to other elements, devices, etc. to help improve the understanding of the embodiments of the present disclosure.

Detailed Description

Exemplary embodiments of the present disclosure will be described hereinafter with reference to the accompanying drawings. In the interest of clarity and conciseness, not all features of an actual implementation are described in the specification. It will of course be appreciated that in the development of any such actual embodiment, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with device-related and business-related constraints, which will vary from one implementation to another. Moreover, it will be appreciated that such a development effort might be complex and time-consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure.

Here, it should be further noted that, in order to avoid obscuring the present disclosure with unnecessary details, only device structures and/or processing steps closely related to the scheme according to the present disclosure are shown in the drawings, and other details not so relevant to the present disclosure are omitted.

The embodiment of the present disclosure provides a rural family domestic sewage recycling system, including: the sewage treatment device comprises a sewage treatment device, a water storage tank, a water pump and a pipeline for connection; the sewage treatment device is characterized in that a sewage inlet of the sewage treatment device is connected with a household sewage drainage pipeline, a U-shaped pipe is arranged on a pipeline in front of the sewage inlet, a water outlet of the sewage treatment device is connected with a water storage tank, and a water outlet of the water storage tank is connected with a water pump.

Fig. 1 schematically shows an example structure of a rural domestic sewage recycling system according to an embodiment of the present disclosure.

As shown in fig. 1, a rural domestic sewage recycling system according to an embodiment of the present disclosure includes: a domestic sewage source 1, a sewage treatment device 7, a water storage tank 8, a water pump 10 and a pipeline for connection. The devices and their connections are further described below.

In the embodiment of the present disclosure, the domestic sewage source 1 may be at least one of a bathtub, a shower stall, a hand sink, a washing machine, and the like. The sewage has better recycling value, and can be used for flushing toilets, cleaning mops, watering flowers and the like after being recycled after being treated.

In the embodiment of the present disclosure, the sewage treatment device 7 is used for collecting and treating sewage generated from each domestic sewage source 1, and a sewage inlet thereof is connected with a domestic sewage drainage pipeline, such as a floor drain pipeline of a shower room, a drainage pipeline of a hand washing sink and/or a drainage pipeline of a washing machine, and the sewage discharged from these facilities is collected for purification treatment; the water outlet of the sewage treatment device is connected with the water storage tank 8, and the sewage is discharged to the water storage tank 8 for storage and standby after being purified.

In the embodiment of the present disclosure, the pipe in front of the sewage inlet of the sewage treatment apparatus 7 is provided with the U-shaped pipe 2, which is used for blocking foreign matters from entering, preventing foreign matters from blocking, reducing subsequent treatment load, and preventing air, bacteria and the like in the sewage pipeline from being transmitted to the home by using the principle of the communicating vessel.

In the embodiment of the present disclosure, the sewage treatment apparatus 7 includes: the upper part of the shell is provided with a water inlet and a filling opening 6, and the lower part of the shell is provided with a water outlet; and the perforated disc 5 and the filter layer are arranged in the shell, and the perforated disc 5 is arranged above the filter layer.

In the embodiment of the disclosure, the housing can be a square or cylindrical closed cavity, which is a place for sewage purification treatment. The housing may be made of, for example, 304 stainless steel, or other materials such as concrete. The upper part of the shell is provided with a filling opening so as to facilitate the replacement or cleaning of the filtering material in the shell, and particularly, the filling opening can be arranged at the top of the shell or at the upper position of the side surface of the shell.

In the embodiment of the present disclosure, the filter layer preferably includes a quartz sand layer 71 and an activated carbon layer 72, and the quartz sand layer 71 is located above the activated carbon layer 72. The quartz sand and the active carbon material are convenient to take and use, have low manufacturing cost and are very suitable for sewage purification in rural families. The quartz sand layer 71 is used to intercept suspended matter and colloidal particles in water, thereby reducing turbidity of the water. The activated carbon filter material contained in the activated carbon layer 72 is a very good adsorption material, is manufactured by using charcoal, bamboo charcoal, various shells, high-quality coal and the like as raw materials and performing a series of processes such as crushing, sieving, catalyst activation, rinsing, drying, screening and the like on the raw materials through a physical method, has double characteristics of physical adsorption and chemical adsorption, and can selectively adsorb various substances in water so as to achieve the purposes of decoloring, deodorizing, removing chemical pollution, removing volatile organic compounds and the like. The shape of the quartz sand layer 71 and the activated carbon layer 72 is matched with the sectional shape of the housing of the sewage treatment device to ensure that the retained sewage is subjected to filtration treatment, for example, if the cross section of the housing is square, the shape of the filter layer is square, and if the cross section of the housing is circular, the shape of the filter layer is circular. The grain diameters of the quartz sand layer 71 and the activated carbon layer 72 are not limited, and a proper grain diameter proportion is adopted according to actual conditions so as to achieve the optimal effect; preferably, the quartz sand layer 71 is made of fine quartz sand having a particle size of 2-4mm, and the activated carbon layer 72 is made of activated carbon particles having a particle size of 2-4 mm. The quartz sand layer 71 and the activated carbon layer 72 are not limited and may be adjusted according to actual needs, but the thickness of each layer should not exceed 1/3, which is the height of the shell.

In the embodiment of the present disclosure, the perforated disc 5 is used for uniformly distributing the sewage into the filtering material, so as to improve the utilization rate of the filtering material and the purification treatment effect, and the shape of the perforated disc 5 is matched with the cross-sectional shape of the casing of the sewage treatment device, such as square, circular, etc. The perforated disc 5 may be made of stainless steel.

In the embodiment of the disclosure, sewage enters the shell and then is uniformly distributed through the perforated disc 5, and then is filtered layer by layer sequentially through the quartz sand layer 71 and the activated carbon layer 72, and the filtered water flows out of the water outlet at the lower part of the shell of the sewage treatment device and enters the water storage tank to realize water recycling, so that the sewage discharge is reduced, the pollution to the ecological environment is avoided, the water recycling quality is ensured, and the water recycling rate is improved.

In another embodiment of the present disclosure, the sewage treatment apparatus further includes: a water storage tank 3, wherein the lower part of the water storage tank 3 is provided with a one-way valve 4; the water storage tank is used for temporarily receiving the drainage from each household sewage drainage pipeline, not only plays a role in hydraulic buffering, but also has a certain precipitation effect; check valve 4 can be check ball valve, steerable sewage gets into sewage treatment plant's velocity of flow, increases the contact time of pollutant and filtering material, promotes absorbent effect. In order to save space, the water storage tank 3 may be optionally disposed inside the sewage treatment device, specifically, for example, disposed at the upper portion of the accommodating space in the housing, and the water storage tank 3 may be a square body (see fig. 1), or may be a cylinder with a conical bottom.

In the embodiment of the disclosure, the water storage tank 8 of the rural domestic sewage recycling system is used for storing the water treated by the sewage treatment device 7, the water inlet of the water storage tank is connected with the water outlet of the sewage treatment device 7, and the water outlet of the water storage tank is connected with a subsequent water using device. Considering the intermittence of domestic sewage discharge and the uncertainty of water using time, the water storage tank 8 is arranged to facilitate the improvement of the utilization rate of the stored recycled water and the high recycled water.

In the embodiment of the disclosure, the water pump 10 of the rural domestic sewage recycling system is connected with the water outlet of the water storage tank 8, and is used for providing power to convey recycled water to a subsequent water using device, such as a toilet water tank 12, a mop washing pool, a gardening watering device and the like.

In another embodiment of the present disclosure, the water pump 10 of the rural domestic sewage recycling system may be a solar water pump 11, in other words, the rural domestic sewage recycling system further includes a photovoltaic power generation system 9 (which may include a solar panel, a controller, a storage battery, etc.) connected to the water pump 10, and provides energy for the water pump 10. At present, an independent photovoltaic system is generally prepared in rural areas, the independent photovoltaic system is not connected with a local power grid, a photovoltaic power generation system is connected with a solar storage battery through a charging controller, generated surplus electric quantity can be stored in the storage battery, the photovoltaic power generation system can be used when solar radiation intensity is low (at night or in rainy days), energy obtained by a rural family domestic sewage recycling system through solar power generation can save resources, and the photovoltaic power generation system is green and environment-friendly. Certainly, the rural domestic sewage recycling system can be externally connected with a municipal power supply as a standby power supply so as to maintain the normal operation of the system.

In another embodiment of the present disclosure, the sewage treatment apparatus 7 includes: a cylindrical shell 73, wherein the upper part of the shell is provided with a water inlet, the lower part of the shell is provided with a water outlet, a column 74 is vertically arranged in the shell 73, and a layer of steps 75 (see fig. 2 and 3) are arranged in the shell 73 in a radial extension manner from the side wall of the column 74 to the inner side wall of the shell 73; the steps 75 comprise horizontal plates and vertical plates, the horizontal plate of each step is connected with the vertical plate of the adjacent step, and the filtering layer is laid on the horizontal plate of each step 75. The number of steps is not limited in the present disclosure, but generally 4-8 steps are provided per week (or per layer), and 1-2 layers (4-16 steps in total) are provided.

Optionally, referring to fig. 3, the edge of the horizontal plate of the step is provided with a baffle 751 to block the filter material and prevent the filter material from flowing away.

Optionally, a detachable or non-detachable filter frame is disposed on the step 75, and the filter layer is disposed in the filter frame. The filter material frame can be disassembled, so that the filter material can be replaced more conveniently. More preferably, a perforated disc is arranged above the filter material frame, so that the inlet water is further uniformly dispersed.

Alternatively, holes may be formed in the horizontal plate of some or all of the steps 75, and some of the sewage may directly fall down after being filtered without being filtered by the next adjacent step, which helps to reduce the impact on the apparatus when the flow rate of the sewage is increased. Preferably, a hole is formed in the horizontal plate of the step 75 from the third step or the fourth step at the water inlet. Because the processing burden of the first step and the second step is heavier than that of other steps, the filter materials of the first step and the second step are replaced more frequently, and therefore, the maintenance work of the design is relatively simple and convenient.

In the above embodiment of the present disclosure, another filter layer is further disposed at the bottom of the cylindrical housing 73. If the stair-type filter layer is a first filter layer, the other filter layer is a second filter layer, and the second filter layer can further carry out secondary filtration treatment on the sewage after the primary filtration treatment of the first filter layer. The filter layer preferably comprises a quartz sand layer 71 and an activated carbon layer 72, and the quartz sand layer 71 is positioned above the activated carbon layer 72.

The design of the step type filter layer adopted in the embodiment is like spiral ascending/descending stairs, and after sewage enters the device from the water inlet, the filtering area can be increased in a limited space, the retention time of the sewage is prolonged, the filtering and purifying effect is improved, and even a structure for a water storage tank can be omitted. In addition, the step type design is easier to replace the filter material, and the use and maintenance are more convenient.

Compared with the prior art, the beneficial effects of the present disclosure include but are not limited to:

1) the rural household domestic sewage recycling system mainly blocks foreign matters from entering, prevents the foreign matters from being blocked, lightens subsequent treatment load, and prevents air, bacteria and the like of a sewer pipeline from being transmitted to the indoor environment to influence human health by arranging the U-shaped pipe and utilizing the principle of a communicating vessel;

2) according to the rural household domestic sewage recycling system, the sewage treatment device and the water storage tank are arranged, the sewage enters the shell and then is filtered layer by layer through the quartz sand layer and the activated carbon layer, and the filtered water enters the water storage tank to realize water recycling, so that the sewage discharge amount is reduced, the pollution to the ecological environment is avoided, and the water recycling rate is improved;

3) according to the rural household sewage recycling system, the sewage treatment device is provided with the filter layer comprising the quartz sand layer and the activated carbon layer, so that the purification effect is good, the filter material is convenient to take and use, the manufacturing cost is low, and the rural household sewage recycling system is very suitable for rural household sewage purification; the spiral ascending/descending step filter layer not only improves the treatment effect, but also is easy to replace and maintain;

4) according to the rural household domestic sewage recycling system, the water storage tank is arranged before the wastewater is filtered and treated to play a role in buffering and sedimentation, and the one-way ball valve is arranged at the water storage tank to control the flow rate of sewage, so that the residence time of the sewage in a filter material is controlled within a reasonable range, and the purification effect is improved;

6) according to the rural household domestic sewage recycling system, the perforated disc is arranged, so that sewage can be uniformly distributed to enter the filtering material, and the utilization rate of the filtering material is improved;

7) the rural household domestic sewage recycling system realizes low energy consumption to maintain the water pump to work by arranging the solar water pump, effectively reduces the power consumption of rural households, and is energy-saving and environment-friendly.

In summary, in the embodiments according to the present disclosure, the present disclosure provides the following technical solutions, but is not limited thereto:

scheme 1. a rural family domestic sewage recycle system, its characterized in that includes: the sewage treatment device comprises a sewage treatment device, a water storage tank, a water pump and a pipeline for connection; the sewage treatment device is characterized in that a sewage inlet of the sewage treatment device is connected with a household sewage drainage pipeline, a U-shaped pipe is arranged on a pipeline in front of the sewage inlet, a water outlet of the sewage treatment device is connected with a water storage tank, and a water outlet of the water storage tank is connected with a water pump.

2. The rural family domestic sewage recycling system according to scheme 1, characterized in that the sewage treatment device comprises: the upper part of the shell is provided with a water inlet and a filling opening, and the lower part of the shell is provided with a water outlet; and the perforated disc and the filter layer are arranged in the shell, and the perforated disc is arranged above the filter layer.

3. The rural household sewage recycling system according to scheme 2 is characterized in that the filter layer comprises a quartz sand layer and an activated carbon layer, and the quartz sand layer is positioned above the activated carbon layer; preferentially, the quartz sand layer adopts fine quartz sand with the particle size of 2-4 mm; the activated carbon layer adopts activated carbon particles with the particle size of 2-4 mm.

4. The rural family domestic sewage recycling system according to scheme 2 or 3, characterized in that the sewage treatment device further comprises: the water storage tank, the storage tank lower part is equipped with the check valve.

5. The rural household sewage recycling system according to the scheme 4 is characterized in that the one-way valve is a one-way ball valve.

6. The rural family domestic sewage recycling system according to the scheme 4 is characterized in that the water storage tank is arranged above the inside of the shell of the sewage treatment device.

7. The rural family domestic sewage recycling system according to scheme 1, characterized in that the water treatment device comprises: the water inlet is arranged at the upper part of the shell, the water outlet is arranged at the lower part of the shell, an upright column is vertically arranged in the shell, and a plurality of layers of steps are arranged in the shell in a radial extending manner from the side wall of the upright column to the inner side wall of the shell; and a filter layer is arranged on the step.

8. The rural household sewage recycling system according to scheme 7 is characterized in that the steps comprise horizontal plates and vertical plates, the horizontal plate of each step is connected with the vertical plate of the adjacent step, and the filter layer is paved on the horizontal plate of each step.

9. The rural household sewage recycling system according to the scheme 8 is characterized in that a baffle is arranged at the edge of a horizontal plate of the step.

10. The rural family domestic sewage recycling system according to any one of the schemes 7-9, characterized in that a filter frame is arranged on the step, and the filter layer is arranged in the filter frame.

11. The rural family domestic sewage recycling system according to any one of the schemes 8-10, characterized in that a perforated disc is arranged above the filter material layer.

12. The rural domestic sewage recycling system according to any of the schemes 8-11, wherein a horizontal plate of part or all of the steps can be provided with holes.

13. The rural domestic sewage recycling system according to scheme 12, characterized in that a hole is formed in a horizontal plate of the step from the third step or the fourth step from the water inlet of the housing.

14. The rural household sewage recycling system according to the scheme 12 or 13, characterized in that another filter layer is further arranged at the bottom of the cylindrical shell.

15. The rural household sewage recycling system according to the schemes 1 to 14, characterized in that the water pump is a solar water pump.

Finally, it is also noted that, in the present disclosure, relational terms such as left and right, first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

While the disclosure has been disclosed above by the description of specific embodiments thereof, it should be understood that various modifications, improvements or equivalents of the disclosure may be devised by those skilled in the art within the spirit and scope of the appended claims. Such modifications, improvements and equivalents are intended to be included within the scope of the present disclosure as claimed.

Claims (15)

1. The utility model provides a rural family domestic sewage recycle system which characterized in that includes: the sewage treatment device comprises a sewage treatment device, a water storage tank, a water pump and a pipeline for connection; the sewage treatment device is characterized in that a sewage inlet of the sewage treatment device is connected with a household sewage drainage pipeline, a U-shaped pipe is arranged on a pipeline in front of the sewage inlet, a water outlet of the sewage treatment device is connected with a water storage tank, and a water outlet of the water storage tank is connected with a water pump.

2. The rural domestic sewage recycling system of claim 1, wherein the sewage treatment device comprises: the upper part of the shell is provided with a water inlet and a filling opening, and the lower part of the shell is provided with a water outlet; and the perforated disc and the filter layer are arranged in the shell, and the perforated disc is arranged above the filter layer.

3. The rural domestic sewage recycling system of claim 2, wherein the filter layer comprises a quartz sand layer and an activated carbon layer, and the quartz sand layer is located above the activated carbon layer.

4. The rural domestic sewage recycling system of claim 2 or 3, wherein the sewage treatment device further comprises: the water storage tank, the storage tank lower part is equipped with the check valve.

5. The rural domestic sewage recycling system of claim 4, wherein the one-way valve is a one-way ball valve.

6. The rural domestic sewage recycling system of claim 4, wherein the water storage tank is disposed above the inside of the housing of the sewage treatment device.

7. The rural domestic sewage recycling system of claim 1, wherein the water treatment device comprises: the water inlet is arranged at the upper part of the shell, the water outlet is arranged at the lower part of the shell, an upright column is vertically arranged in the shell, and a plurality of layers of steps are arranged in the shell in a radial extending manner from the side wall of the upright column to the inner side wall of the shell; and a filter layer is arranged on the step.

8. The rural domestic sewage recycling system of claim 7, wherein the steps comprise horizontal plates and vertical plates, the horizontal plate of each step is connected with the vertical plate of the adjacent step, and the filter layer is paved on the horizontal plate of the step.

9. The rural domestic sewage recycling system of claim 8, wherein the edge of the horizontal plate of the step is provided with a baffle.

10. The rural domestic sewage recycling system of any one of claims 7-9, wherein a filter frame is arranged on the step, and the filter layer is arranged in the filter frame.

11. The rural domestic sewage recycling system of any of claims 7-9, wherein a perforated tray is provided above the filter layer.

12. The rural domestic sewage recycling system of claim 8 or 9, wherein a horizontal plate of part or all of the steps can be provided with holes.

13. The rural domestic sewage recycling system of claim 12, wherein a hole is opened on a horizontal plate of the step starting from a third step or a fourth step at the water inlet of the housing.

14. The rural domestic sewage recycling system of claim 13, wherein the cylindrical housing is further provided with another filter layer at the bottom.

15. The rural domestic sewage recycling system of any of claims 1-3 and 5-9, wherein the water pump is a solar water pump.

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