A resource recycling off-grid public toilet system based on source separation and biological treatment

Abstract

The utility model provides a kind of resource recycling type off-grid public toilet system based on source separation and biological treatment, it is related to public toilet field, comprising: public toilet, separation unit, portable maintenance mechanism, liquid processing unit, solid processing unit, synchronous mixing mechanism, wash basin;The public toilet includes toilet main body, induced draft chimney, toilet door main body and fixed seat;The source separation unit is connected with public toilet, for urine, excrement is transported to source separation unit;Source separation unit includes micro water flush toilet and portable maintenance mechanism.Urine realizes pathogen inactivation and urea hydrolysis rotten liquid manure of ripening by natural fermentation, composting reaction box is mixed by additive and excrement, form high-quality humus, solve the toilet multiple chemical treatment or simple landfill, there is secondary pollution risk, also have the scheme of high-temperature incineration or distillation technology, there is the problem of extremely high energy consumption, complex operation.

Description

Technical Field

[0001] This utility model relates to the field of public toilet technology, and in particular to a resource-recycling off-grid public toilet system based on source separation and biological treatment. Background Technology

[0002] Traditional public toilets rely heavily on municipal pipe networks for water supply and sewage disposal, consuming a large amount of water resources and transferring pollution. Therefore, in areas without pipe networks (such as scenic areas, protected areas, and rural areas) or special scenarios (such as temporary construction sites and exhibitions), off-grid public toilet systems are usually chosen to provide safe, hygienic, and environmentally friendly toilet solutions for scenarios lacking basic municipal infrastructure. Existing off-grid public toilet systems typically consist of a toilet body, a toilet bowl, and a washbasin.

[0003] However, existing off-grid public toilets mostly use chemical treatment or simple landfill to treat urine and feces. Chemical treatment requires long-term reliance on specific agents, which can easily cause secondary pollution due to agent residues or incomplete reactions. Furthermore, the treated products need to be frequently removed and cannot be utilized as resources. Meanwhile, simple landfill carries the risk of pollutant leakage. There are also high-temperature incineration or distillation options, but these consume a lot of energy, are complex to operate, and can generate new secondary pollutants such as high-concentration waste liquid, making them inconvenient to use. Utility Model Content

[0004] In view of this, the present invention provides a resource-recycling off-grid public toilet system based on source separation and biological treatment, which features complete off-grid operation and energy saving, and can realize resource recycling and turn waste into treasure.

[0005] This utility model provides the purpose and efficacy of a resource-recycling off-grid public toilet system based on source separation and biological treatment. Specifically, it includes: a public toilet, a separation unit, a portable maintenance mechanism, a liquid treatment unit, a solid treatment unit, a synchronous mixing mechanism, a washbasin, an auxiliary unit, a liquid collection port, and a fertilizer collection port. The public toilet includes a toilet body, a ventilation chimney, a toilet door body, and a fixed base. The source separation unit is connected to the public toilet and is used to transport urine and feces to the source separation unit. The source separation unit includes a micro-flushing toilet and a portable maintenance mechanism. The liquid treatment unit is connected to the source... A separation unit is connected to transport the separated urine to a liquid treatment unit; the liquid treatment unit includes a urine storage tank; the urine storage tank is installed in a fixed base; the solid treatment unit is connected to the source separation unit to transport the separated feces to the solid treatment unit; the solid treatment unit includes a synchronous mixing mechanism, an additive bin, and a composting reaction tank; a handwashing basin is connected to the liquid treatment unit to transport handwashing wastewater to the liquid treatment unit; the auxiliary unit is connected to a public toilet; the liquid intake port is located inside the liquid treatment unit; the fertilizer intake port is located inside the public toilet.

[0006] Furthermore, the source separation unit also includes a urine collection bucket and a urine recovery pipe. The urine collection bucket is fixedly connected to the front of the water-flushing toilet. The first end of the urine recovery pipe is connected to the drain outlet of the urine collection bucket, and the end of the urine recovery pipe is located inside the urine storage tank. The water-flushing toilet is fixedly connected inside the toilet body. The toilet door body is symmetrically hinged to the front of the toilet body. The exhaust vent is fixedly connected to the top surface of the toilet body. The fixing base is fixedly connected to the bottom surface of the toilet body.

[0007] Furthermore, the source separation unit also includes a sealing cover, a mounting groove, and an adsorption pad. The sealing cover is hinged to the top surface of the urine collection hopper; the mounting groove is located on the bottom surface of the sealing cover; and the adsorption pad is disposed within the mounting groove. The adsorption pad is a rectangular plate-shaped structure made of activated carbon.

[0008] Furthermore, the portable maintenance mechanism includes a guide collar, a sliding frame, a connecting spring, a pressing block, a sliding column, a limiting plate, a return spring, and an auxiliary spring. Two sliding columns are provided, each passing through the toilet body and symmetrically slidably connected to the fixed base. The sliding frame is slidably connected to the outside of the two sliding columns. Two limiting plates are provided, each fixedly connected to the outside of the two sliding columns; both limiting plates are aligned with the position of the sliding frame. Two return springs are provided, each fixedly connected to the top surface of the two limiting plates; the ends of both return springs are fixedly connected to... The bottom surface of the sliding frame; the guide collar is fixedly connected to the top surface of the water tank of the micro-flush toilet; the guide collar is inserted into the sliding frame; multiple sets of connecting springs are provided, and the multiple sets of connecting springs are fixedly connected to the top surface of the guide collar in a circular array; the ends of the multiple sets of connecting springs are all fixedly connected to the sliding frame; the pressing block is fixedly connected to the bottom surface of the sliding frame; the pressing block is aligned with the guide collar; the pressing block is aligned with the flush button of the micro-flush toilet; two sets of auxiliary springs are provided, and the two sets of auxiliary springs are respectively fixedly connected to the outside of the two sliding columns; the ends of the two sets of auxiliary springs are all fixedly connected to the fixed base.

[0009] Furthermore, the solid waste treatment unit includes a fecal recovery pipe; the first end of the fecal recovery pipe is connected to the drain outlet of the micro-flush toilet, and the second end of the fecal recovery pipe passes through the additive bin and is disposed inside the composting reaction box; the additive bin is fixedly connected to the upper part of the fixed base; the composting reaction box is fixedly connected to the bottom end face of the additive bin.

[0010] Furthermore, the solid processing unit also includes a first sealing door and a second sealing door. The first sealing door is hinged to the rear end face of the composting reaction chamber; the first sealing door is aligned with the fertilizer inlet. The second sealing door is hinged to the rear end face of the additive compartment; the second sealing door is aligned with the fertilizer inlet.

[0011] Furthermore, the solid waste treatment unit also includes a drain pipe and a leachate filter screen, with the leachate filter screen located at the bottom of the composting reaction tank; the first end of the drain pipe is fixedly connected to the bottom surface of the composting reaction tank, and the second end of the drain pipe is located inside the urine storage tank; the drain pipe and the leachate filter screen are aligned.

[0012] Furthermore, the synchronous mixing mechanism includes a sliding plate and a connecting swing plate. There are two connecting swing plates, which are respectively hinged to the bottom end faces of two sliding columns. The sliding plate is hinged to the ends of the two connecting swing plates. The sliding plate is slidably connected inside the composting reaction chamber.

[0013] Furthermore, the synchronous mixing mechanism also includes sealing baffles, adding holes, and feeding holes. There are two sealing baffles, both of which are fixedly connected to the rear end face of the sliding plate. The adding holes are arranged in a rectangular array on the bottom end face of the additive bin. The two sealing baffles are aligned with the positions of multiple sets of adding holes. The feeding holes are arranged in a rectangular array on the top face of the composting reaction chamber. The multiple sets of feeding holes are aligned with the positions of multiple sets of adding holes.

[0014] Furthermore, the auxiliary unit includes an exhaust pipe, an extraction pipe, a solar panel, and an exhaust fan. The first end of the extraction pipe is fixedly connected to the upper part of the composting reaction box, and the second end of the extraction pipe is located inside the toilet body. There are two exhaust pipes in total. The first ends of the two exhaust pipes are fixedly connected to the left and right sides of the composting reaction box, respectively, and the second ends of the two exhaust pipes are fixedly connected to the exhaust chimney. The exhaust fan is bolted and fastened inside the exhaust chimney. Both exhaust pipes are located below the exhaust fan. The solar panel is bolted and fastened to the top surface of the toilet body. The solar panel is electrically connected to the exhaust fan. Beneficial effects

[0015] This invention uses a urine collection bucket to collect urine separately, and a micro-flushing toilet as the outlet for collecting feces. A urine collection pipe guides the collected urine into a urine storage tank. Wastewater from the washbasin also flows into the urine storage tank. The urine is stored in the tank for at least 6 months, where it undergoes natural fermentation to inactivate pathogens and hydrolyze urea to produce liquid fertilizer. A feces collection pipe guides the flushed feces into a composting reactor for storage. Additives are added to the feces, and after complete composting (usually 6-12 months), high-quality humus is formed. This process is a natural biological process, requiring no electricity for incineration or distillation. Auxiliary ventilation can be provided by solar energy, achieving near-natural decomposition. Zero-energy operation allows public toilets to be completely off-grid, significantly increasing energy efficiency. It also transforms traditionally wasteful waste such as urine and feces into two high-value resources: humus and liquid fertilizer, achieving a true closed-loop cycle that aligns with the principles of a circular economy. This resource recycling turns waste into treasure, with no wastewater discharge (liquid is used as fertilizer) and no hazardous waste generated. The solid products are stable and harmless, causing no secondary pollution, thus improving the safety of the off-grid public toilet system. The system has a simple structure with no complex or precision components, resulting in a low failure rate. It requires minimal cleaning (only fertilizer needs to be collected once a year), greatly reducing long-term operation and maintenance costs. No chemical agents are needed, and the treatment process is ecological and natural, superior to incineration and distillation-based environmentally friendly toilets, effectively improving the practicality of the off-grid public toilet system.

[0016] The sealing cover allows users to seal the urine collection box when urination is not required. The absorbent pad absorbs odors generated when the urine collection box is sealed, reducing odor emissions and further improving the practicality of the off-grid public toilet system.

[0017] When flushing the water-flushing toilet, pressing the sliding frame moves the sliding column downwards, and the sliding plate is pulled by the connecting swing plate, causing the sealing baffle to misalign with the addition hole. At this time, the additive in the additive compartment will enter the addition hole and then enter the feed hole, adding the additive to the composting reaction tank to mix with the feces. This allows the additive and feces to mix in a timely manner, balancing the compost composition, which is conducive to microbial decomposition, achieving automation without additional manual operation; making the compost pile more breathable, fermenting more evenly and faster; reducing odors, improving the environment; accelerating compost maturation, and recycling resources more efficiently. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0019] The accompanying drawings described below are only related to some embodiments of the present invention and are not intended to limit the scope of the present invention.

[0020] In the attached diagram: Figure 1 This is a schematic diagram of the structure of the system of this utility model.

[0021] Figure 2 This is an isometric structural diagram of the toilet body of this utility model.

[0022] Figure 3 This is an isometric structural diagram of the solar panel of this utility model.

[0023] Figure 4 This is an isometric structural schematic diagram of the toilet body of this utility model from the rear view.

[0024] Figure 5 This is a cross-sectional structural diagram of the toilet body of this utility model.

[0025] Figure 6 This is an isometric structural diagram of the urine collection funnel of this utility model.

[0026] Figure 7 This is an isometric structural diagram of the micro-flushing toilet of this utility model.

[0027] Figure 8 This is a utility model Figure 7 A magnified structural diagram at point A.

[0028] Figure 9 This is a utility model Figure 7 A magnified structural diagram at point B.

[0029] Figure 10 This is a utility model Figure 7 A magnified structural diagram at point C.

[0030] Figure 11 This is an isometric structural diagram of the urine storage tank of this utility model.

[0031] Figure 12 This is an isometric structural diagram of the additive compartment of this utility model.

[0032] Figure 13 This is an isometric structural diagram of the sealing baffle of this utility model.

[0033] Figure 14 This is a utility model Figure 13 A magnified structural diagram at point D.

[0034] Figure 15 This is an isometric structural diagram of the leachate filter screen of this utility model.

[0035] List of reference numerals 1. Public Toilet; 101. Toilet Body; 102. Exhaust Chimney; 103. Toilet Door Body; 104. Fixing Base; 2. Source Separation Unit; 201. Micro-flush Toilet; 202. Urine Collection Box; 203. Sealing Cover; 204. Mounting Groove; 205. Absorption Pad; 206. Guide Ring; 207. Sliding Frame; 208. Connecting Spring; 209. Pressing Block; 210. Sliding Column; 211. Limiting Plate; 212. Return Spring; 213. Urine Collection Tube; 214. Auxiliary Spring; 3. Liquid Processing Unit; 301 4. Urine storage tank; 5. Solid waste treatment unit; 6. Additive storage bin; 7. Composting reaction chamber; 8. Fecal recovery pipe; 9. Drainage pipe; 10. Leachate filter; 11. First sealing door; 12. Sliding plate; 13. Connecting swing plate; 14. Sealing baffle; 15. Second sealing door; 16. Addition hole; 17. Feeding hole; 18. Hand basin; 19. Auxiliary unit; 20. Exhaust pipe; 30. Suction pipe; 41. Solar panel; 52. Exhaust fan; 63. Liquid outlet; 74. Fertilizer outlet. Detailed Implementation

[0036] Example

[0037] This utility model provides a resource-recycling off-grid public toilet system based on source separation and biological treatment. Please refer to [reference needed]. Figures 1 to 15 As shown, it includes: a public toilet 1, a source separation unit 2, a portable maintenance mechanism, a liquid treatment unit 3, a solid treatment unit 4, a synchronous mixing mechanism, a washbasin 5, an auxiliary unit 6, a liquid dispensing port 7, and a fertilizer dispensing port 8. Public toilet 1 includes a toilet body 101, an exhaust duct 102, a toilet door body 103, and a fixed base 104; a source separation unit 2 is connected to public toilet 1 and is used to transport urine and feces to the source separation unit 2; the source separation unit 2 includes a micro-flushing toilet 201 and a portable maintenance mechanism; a liquid treatment unit 3 is connected to source separation unit 2 and is used to transport separated urine to the liquid treatment unit 3; the liquid treatment unit 3 includes a urine storage tank 301; the urine storage tank 301 is installed in the fixed base 104; a solid treatment unit 4 is connected to source separation unit 2 and is used to transport separated feces to the solid treatment unit 4; the solid treatment unit 4 includes a synchronous mixing mechanism, an additive bin 401, and a composting reaction box 402; a handwashing basin 5 is connected to liquid treatment unit 3 and is used to transport handwashing wastewater to liquid treatment unit 3; an auxiliary unit 6 is connected to public toilet 1; a liquid inlet 7 is installed in liquid treatment unit 3; and a fertilizer inlet 8 is installed in public toilet 1.

[0038] The source separation unit 2 also includes a urine collection bucket 202 and a urine recovery pipe 213. The urine collection bucket 202 is fixedly connected to the front of the water-flushing toilet 201. The first end of the urine recovery pipe 213 is connected to the drain port of the urine collection bucket 202, and the end of the urine recovery pipe 213 is located inside the urine storage tank 301. The water-flushing toilet 201 is fixedly connected to the toilet body 101. The toilet door body 103 is symmetrically hinged to the front of the toilet body 101. The exhaust duct 102 is fixedly connected to the top surface of the toilet body 101. The fixing seat 104 is fixedly connected to the bottom surface of the toilet body 101.

[0039] The source separation unit 2 also includes a sealing cover 203, an installation groove 204, and an adsorption pad 205. The sealing cover 203 is hinged to the top surface of the urine collection box 202; the installation groove 204 is opened on the bottom surface of the sealing cover 203; the adsorption pad 205 is disposed in the installation groove 204; the adsorption pad 205 is a rectangular plate structure made of activated carbon.

[0040] The portable maintenance mechanism includes a guide collar 206, a sliding frame 207, a connecting spring 208, a pressing block 209, a sliding column 210, a limiting plate 211, a return spring 212, and an auxiliary spring 214. Two sliding columns 210 are provided, each passing through the toilet body 101 and symmetrically slidably connected to the fixed base 104. The sliding frame 207 is slidably connected to the outside of the two sliding columns 210. Two limiting plates 211 are provided, each fixedly connected to the outside of the two sliding columns 210. Both limiting plates 211 are aligned with the position of the sliding frame 207. Two return springs 212 are provided, each fixedly connected to the top surface of the two limiting plates 211. The ends of both return springs 212 are fixedly connected to... On the bottom surface of the sliding frame 207; the guide collar 206 is fixedly connected to the top surface of the water tank of the micro-flush toilet 201; the guide collar 206 is inserted into the sliding frame 207; multiple sets of connecting springs 208 are provided, and the multiple sets of connecting springs 208 are fixedly connected to the top surface of the guide collar 206 in a ring array; the ends of the multiple sets of connecting springs 208 are all fixedly connected to the sliding frame 207; the pressing block 209 is fixedly connected to the bottom surface of the sliding frame 207; the pressing block 209 is aligned with the guide collar 206; the pressing block 209 is aligned with the flush button of the micro-flush toilet 201; two sets of auxiliary springs 214 are provided, and the two sets of auxiliary springs 214 are respectively fixedly connected to the outside of the two sliding columns 210; the ends of the two sets of auxiliary springs 214 are all fixedly connected to the fixed seat 104.

[0041] The solid waste treatment unit 4 includes a fecal recycling pipe 403; the first end of the fecal recycling pipe 403 is connected to the drain outlet of the micro-flushing toilet 201, and the end of the fecal recycling pipe 403 passes through the additive bin 401 and is installed inside the composting reaction box 402; the additive bin 401 is fixedly connected to the upper part of the fixing base 104; and the composting reaction box 402 is fixedly connected to the bottom end face of the additive bin 401.

[0042] The solid processing unit 4 also includes a first sealing door 406 and a second sealing door 410. The first sealing door 406 is hinged to the rear end face of the composting reaction box 402 and is aligned with the fertilizer inlet 8. The second sealing door 410 is hinged to the rear end face of the additive bin 401 and is aligned with the fertilizer inlet 8.

[0043] The solid treatment unit 4 also includes a drain pipe 404 and a leachate filter 405. The leachate filter 405 is located at the bottom of the composting reaction tank 402. The first end of the drain pipe 404 is fixedly connected to the bottom surface of the composting reaction tank 402, and the end of the drain pipe 404 is located inside the urine storage tank 301. The drain pipe 404 and the leachate filter 405 are aligned.

[0044] The synchronous mixing mechanism includes a sliding plate 407 and a connecting plate 408. There are two connecting plates 408, which are hinged to the bottom surfaces of the two sliding columns 210 respectively. The sliding plate 407 is hinged to the ends of the two connecting plates 408. The sliding plate 407 is slidably connected inside the composting reaction box 402.

[0045] The synchronous mixing mechanism also includes a sealing baffle 409, an addition hole 411, and a feed hole 412. There are two sealing baffles 409, both of which are fixedly connected to the rear end face of the sliding plate 407. The addition holes 411 are arranged in a rectangular array on the bottom end face of the additive bin 401. The two sealing baffles 409 are respectively aligned with the positions of multiple sets of addition holes 411. The feed holes 412 are arranged in a rectangular array on the top end face of the composting reaction box 402. The multiple sets of feed holes 412 are respectively aligned with the positions of multiple sets of addition holes 411.

[0046] The specific usage and function of this embodiment: In this utility model, urine is collected separately through the urine collection bucket 202, and the micro-flushing toilet 201 serves as the defecation outlet for collecting feces. The urine collection pipe 213 guides the collected urine into the urine storage tank 301 for storage. Simultaneously, wastewater from the washbasin 5 also flows into the urine storage tank 301. The urine storage tank 301 is made of corrosion-resistant material. The urine is stored in the urine storage tank 301 for at least 6 months, where pathogens are inactivated and urea is hydrolyzed through natural fermentation. The fermented liquid fertilizer can then be removed through the liquid outlet 7, which is a water pipe equipped with a one-way valve. The sealing cap 203 allows users to easily access the liquid fertilizer when urination is not required. The urine collection box 202 is sealed. The absorbent pad 205 absorbs odors generated during the sealing process, reducing odor emissions. When flushing the micro-flushing toilet 201, pressing the sliding bracket 207 moves it downwards, compressing the connecting spring 208. This causes the pressing block 209 to slowly approach the flush button and press it to flush. During the movement of the sliding bracket 207, the sliding column 210 slides within the fixed base 104, stretching the auxiliary spring 214. The auxiliary spring 214 facilitates the return of the sliding column 210 to its original position. When the water tank lid of the micro-flushing toilet 201 needs to be opened, the user can pull the sliding bracket 207 upwards as the lid is lifted. 07 slides upward along the sliding column 210 and stretches the return spring 212, allowing the sliding frame 207 to be lifted together with the water tank lid, preventing the sliding frame 207 from interfering with the maintenance of the water tank of the micro-flush toilet 201. The feces collection pipe 403 can guide the flushed feces into the composting reaction tank 402 for storage. The composting reaction tank 402 is equipped with an insulation layer. The contact surfaces of the first sealing door 406 and the composting reaction tank 402, as well as the contact surfaces of the second sealing door 410 and the additive compartment 401, are all equipped with sealing strips to ensure a sealing effect. The staff can open the fertilizer outlet 8 and then choose to open the first sealing door 406 to take out the composted humus in the composting reaction tank 402 or open the second sealing door 410 to add fertilizer. The additives in the additive bin 401 are loose carbon source materials such as sawdust, straw fragments, and coconut coir. The leachate filter 405 filters the flushed manure, removing excess leachate which is then discharged through the drain pipe 404 into the urine storage tank 301 to prevent the compost pile from becoming too wet. As the sliding column 210 moves downwards, it drives the sliding plate 407 to slide within the composting reaction chamber 402 via the connecting swing plate 408. Initially, the sealing baffle 409 seals the addition hole 411. As the sliding plate 407 slides, it moves the sealing baffle 409, causing it to shift out of alignment with the addition hole 411. At this point, the additives in the additive bin 401 enter the addition hole 411.The additives are introduced into the feed inlet 412 through the addition hole 411 and added to the composting reaction tank 402 to mix with the feces. After the compost product is fully decomposed, typically 6-12 months later, high-quality humus is formed. This improves the resource utilization of off-grid public toilet systems while achieving low maintenance and low cost, making it superior to incineration and distillation-based environmentally friendly toilets. Example

[0047] Based on Example 1, please refer to Figures 1 to 5 As shown, the system includes: an auxiliary unit 6, which includes an exhaust pipe 601, an extraction pipe 602, a solar panel 603, and an exhaust fan 604. The first end of the extraction pipe 602 is fixedly connected to the upper part of the composting reaction box 402, and the second end of the extraction pipe 602 is located inside the toilet body 101. There are two exhaust pipes 601, with the first ends of the two exhaust pipes 601 fixedly connected to the left and right sides of the composting reaction box 402, respectively, and the second ends of the two exhaust pipes 601 fixedly connected to the exhaust chimney 102. The exhaust fan 604 is bolted and fastened to the exhaust chimney 102. Both exhaust pipes 601 are located at the lower part of the exhaust fan 604. The solar panel 603 is bolted and fastened to the top surface of the toilet body 101. The solar panel 603 is electrically connected to the exhaust fan 604.

[0048] The specific usage and function of this embodiment: In this utility model, the solar panel 603 provides power to the exhaust fan 604. By starting the exhaust fan 604, the toilet body 101 is ventilated, creating a negative pressure in the toilet room. This causes the odor from the toilet body 101 to be continuously drawn into the composting reaction box 402 as process air, and finally discharged through the exhaust chimney 102, thus completely solving the odor problem in the toilet room.

[0049] The following points should be noted in this article: 1. The accompanying drawings of this embodiment only involve the structures involved in this embodiment; other structures can refer to the general design.

[0050] 2. Where there is no conflict, this embodiment and the features in the embodiment can be combined with each other to obtain new embodiments.

[0051] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A resource-recycling off-grid public toilet system based on source separation and biological treatment, comprising: The public toilet (1), source separation unit (2), portable maintenance mechanism, liquid treatment unit (3), solid treatment unit (4), synchronous mixing mechanism, washbasin (5), auxiliary unit (6), liquid collection port (7), and fertilizer collection port (8); the public toilet (1) includes a toilet body (101), a ventilation chimney (102), a toilet door body (103), and a fixed base (104); the source separation unit (2) is connected to the public toilet (1) and is used to transport urine and feces to the source separation unit (2); the source separation unit (2) includes a micro-flushing toilet (201) and a portable maintenance mechanism; the liquid treatment unit (3) is connected to the source separation unit (2) and is used to transport the separated urine to the liquid treatment unit (5). The solid treatment unit (3) includes a urine storage tank (301); the urine storage tank (301) is located in a fixed base (104); the solid treatment unit (4) is connected to the source separation unit (2) and is used to transport the separated feces to the solid treatment unit (4); the solid treatment unit (4) includes a synchronous mixing mechanism, an additive bin (401) and a composting reaction box (402); the handwashing basin (5) is connected to the liquid treatment unit (3) and is used to transport handwashing wastewater to the liquid treatment unit (3); the auxiliary unit (6) is connected to the public toilet (1); the liquid intake port (7) is located in the liquid treatment unit (3); the fertilizer intake port (8) is located in the public toilet (1).

2. The resource-recycling off-grid public toilet system based on source separation and biological treatment as described in claim 1, characterized in that: The source separation unit (2) also includes a urine collection bucket (202) and a urine recovery pipe (213). The urine collection bucket (202) is fixedly connected to the front of the micro-flushing toilet (201). The first end of the urine recovery pipe (213) is connected to the drain port of the urine collection bucket (202), and the end of the urine recovery pipe (213) is located in the urine storage tank (301). The micro-flushing toilet (201) is fixedly connected to the toilet body (101). The toilet door body (103) is symmetrically hinged to the front of the toilet body (101). The exhaust duct (102) is fixedly connected to the top surface of the toilet body (101). The fixing seat (104) is fixedly connected to the bottom surface of the toilet body (101).

3. The resource-recycling off-grid public toilet system based on source separation and biological treatment as described in claim 2, characterized in that: The source separation unit (2) also includes a sealing cover (203), a mounting groove (204), and an adsorption pad (205). The sealing cover (203) is hinged to the top surface of the urine collection box (202). The mounting groove (204) is opened on the bottom surface of the sealing cover (203). The adsorption pad (205) is disposed in the mounting groove (204). The adsorption pad (205) is a rectangular plate structure made of activated carbon.

4. The resource-recycling off-grid public toilet system based on source separation and biological treatment as described in claim 1, characterized in that: The portable maintenance mechanism includes a guide collar (206), a sliding frame (207), a connecting spring (208), a pressing block (209), a sliding column (210), a limiting plate (211), a return spring (212), and an auxiliary spring (214). Two sliding columns (210) are provided, each passing through the toilet body (101) and symmetrically slidably connected to the fixed base (104). The sliding frame (207) is slidably connected to... Outside the two sliding columns (210); two limiting plates (211) are provided, and the two limiting plates (211) are fixedly connected to the outside of the two sliding columns (210); the two limiting plates (211) are aligned with the position of the sliding frame (207); two return springs (212) are provided, and the two return springs (212) are fixedly connected to the top surface of the two limiting plates (211); the ends of the two return springs (212) are fixed. The guide ring (206) is fixedly connected to the bottom surface of the sliding frame (207); the guide ring (206) is fixedly connected to the top surface of the water tank of the micro-flushing toilet (201); the guide ring (206) is inserted into the sliding frame (207); multiple sets of connecting springs (208) are provided, and the multiple sets of connecting springs (208) are fixedly connected to the top surface of the guide ring (206) in a ring array; the ends of the multiple sets of connecting springs (208) are all fixedly connected to the sliding frame (207); the... The pressing block (209) is fixedly connected to the bottom end face of the sliding frame (207); the pressing block (209) is aligned with the guide collar (206); the pressing block (209) is aligned with the flush button of the micro-flushing toilet (201); two sets of auxiliary springs (214) are provided, and the two sets of auxiliary springs (214) are respectively fixedly connected to the outside of the two sliding columns (210); the ends of the two sets of auxiliary springs (214) are fixedly connected to the fixed seat (104).

5. The resource-recycling off-grid public toilet system based on source separation and biological treatment as described in claim 1, characterized in that: The solid waste treatment unit (4) includes a fecal recycling pipe (403); the first end of the fecal recycling pipe (403) is connected to the drain outlet of the micro-flushing toilet (201), and the end of the fecal recycling pipe (403) passes through the additive bin (401) and is set inside the composting reaction box (402); the additive bin (401) is fixedly connected to the upper part of the fixing base (104); the composting reaction box (402) is fixedly connected to the bottom end face of the additive bin (401).

6. The resource-recycling off-grid public toilet system based on source separation and biological treatment as described in claim 1, characterized in that: The solid processing unit (4) further includes a first sealing door (406) and a second sealing door (410). The first sealing door (406) is hinged to the rear end face of the composting reaction chamber (402). The first sealing door (406) is aligned with the fertilizer inlet (8). The second sealing door (410) is hinged to the rear end face of the additive chamber (401). The second sealing door (410) is aligned with the fertilizer inlet (8).

7. The resource-recycling off-grid public toilet system based on source separation and biological treatment as described in claim 1, characterized in that: The solid treatment unit (4) also includes a drain pipe (404) and a leachate filter (405). The leachate filter (405) is located at the bottom of the composting reaction tank (402). The first end of the drain pipe (404) is fixedly connected to the bottom surface of the composting reaction tank (402), and the end of the drain pipe (404) is located inside the urine storage tank (301). The drain pipe (404) and the leachate filter (405) are aligned.

8. The resource-recycling off-grid public toilet system based on source separation and biological treatment as described in claim 4, characterized in that: The synchronous mixing mechanism includes a sliding plate (407) and a connecting plate (408). There are two connecting plates (408), which are hinged to the bottom surfaces of two sliding columns (210). The sliding plate (407) is hinged to the ends of the two connecting plates (408). The sliding plate (407) is slidably connected inside the composting reaction chamber (402).

9. The resource-recycling off-grid public toilet system based on source separation and biological treatment as described in claim 8, characterized in that: The synchronous mixing mechanism also includes a sealing baffle (409), an addition hole (411), and a feed hole (412). There are two sealing baffles (409), and both sealing baffles (409) are fixedly connected to the rear end face of the sliding plate (407). The addition holes (411) are arranged in a rectangular array on the bottom end face of the additive bin (401). The two sealing baffles (409) are respectively aligned with the positions of multiple sets of addition holes (411). The feed holes (412) are arranged in a rectangular array on the top end face of the composting reaction box (402). The multiple sets of feed holes (412) are respectively aligned with the positions of multiple sets of addition holes (411).

10. The resource-recycling off-grid public toilet system based on source separation and biological treatment as described in claim 1, characterized in that: The auxiliary unit (6) includes an exhaust pipe (601), an extraction pipe (602), a solar panel (603), and an exhaust fan (604). The first end of the extraction pipe (602) is fixedly connected to the upper part of the composting reaction box (402), and the end of the extraction pipe (602) is located inside the toilet body (101). There are two exhaust pipes (601), and the first ends of the two exhaust pipes (601) are respectively fixedly connected to the composting reaction box (603). On both sides of 402, the ends of the two exhaust pipes (601) are fixedly connected to the exhaust chimney (102); the exhaust fan (604) is bolted and fastened to the exhaust chimney (102); the two exhaust pipes (601) are both located at the lower part of the exhaust fan (604); the solar panel (603) is bolted and fastened to the top surface of the toilet body (101); the solar panel (603) is electrically connected to the exhaust fan (604).

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