Sewer-free scene excrement and urine in-situ treatment and resource utilization system and method

Abstract

The invention provides a sewer-free scene excrement and urine in-situ treatment and recycling system and method, and belongs to the technical field of sewage treatment equipment.The sewer-free scene excrement and urine in-situ treatment and recycling system comprises a ceramic membrane system connected with a toilet stool, and the water outlet end of the ceramic membrane system is communicated with a membrane distillation system; one end of the ceramic membrane system is also communicated with a material recycling bin; one end of the membrane distillation system is communicated with the material recycling box, and the other end of the membrane distillation system is communicated with a recycling water tank. According to the method, the manure wastewater is subjected to stabilization pretreatment through the efficient medicament regulation effect, loss of nutrient substances such as nitrogen and phosphorus is effectively reduced, efficient solid-liquid separation is achieved through the ceramic membrane, solid substances are converted into fertilizer, meanwhile, water resources are recycled through the membrane distillation technology, consumption of the water resources and generation of secondary pollution are greatly reduced, and the method is suitable for large-scale popularization and application. The environment friendliness is embodied.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment equipment, and in particular to a system and method for in-situ treatment and resource utilization of feces and urine in a sewer-free scenario. Background Art

[0002] The use of non-sewered toilets is becoming increasingly common, especially in high-speed trains, airplanes, ships, outdoor venues and temporary construction sites. Although human feces and urine only account for 1% to 2% of domestic sewage treatment emissions, they contribute 80% of nitrogen, 50% of phosphorus and 10% of chemical oxygen demand (COD) in domestic sewage, demonstrating their importance in resource recovery. These wastewaters are characterized by high organic matter, high suspended solids, high ammonia nitrogen, high phosphorus and low carbon-nitrogen ratio, which not only has a serious impact on the environment, but also increases the difficulty of treatment.

[0003] At present, traditional biochemical treatment methods often remove nitrogen, phosphorus and other resources from sewage, resulting in loss and waste of resources, especially the rich nutrients in urine are not effectively utilized. In addition, traditional treatment methods also face many problems, such as the need for more feces and urine storage space, frequent sewage unloading operations, and mixed treatment with domestic sewage in the station, causing grey water to be contaminated by feces and urine, thereby increasing the difficulty and cost of subsequent treatment. This not only increases treatment costs and labor costs, but also makes it difficult to reuse and recycle fecal sewage.

[0004] Therefore, as a wastewater resource rich in nutrients, the source treatment and recycling methods of feces and urine are gradually attracting attention. Feces and urine contain 95% water, 3.5% organic matter and 1.5% inorganic salts, as well as important nutrients such as nitrogen and phosphorus. Through proper treatment, the organic matter and nutrients such as nitrogen and phosphorus in feces and urine can be returned to farmland and vegetable fields as fertilizers, realizing a closed cycle of nutrients and reducing pollutant emissions. At present, the methods for treating feces and urine include precipitation, biological methods, adsorption, ion exchange and membrane separation technology. Among them, the adsorption method is widely used because of its simple operation and easy implementation, while membrane separation technology is increasingly valued because of its high processing efficiency, low energy consumption and good stability. Combining adsorption pretreatment with membrane distillation technology can not only effectively remove pollutants in feces and urine, but also realize the recovery of nitrogen and phosphorus resources, forming a resource-based and harmless feces and urine treatment solution.

[0005] At present, the treatment methods for wastewater from toilets without sewers mainly include drying treatment, composting treatment and bioreactor treatment, but these traditional methods have many defects. Although drying treatment is simple and easy, it takes a long time to process, usually weeks or even months, and it is easy to produce odor during the drying process, affecting the surrounding environment. Composting treatment can convert organic waste into fertilizer, but the treatment cycle is also long, and greenhouse gases may be produced during the decomposition process, causing the greenhouse effect to intensify. In addition, although the bioreactor has a significant treatment effect, its equipment is complex, the construction and maintenance costs are high, the requirements for the microbial environment are strict, and it is easily affected by external factors. In addition, transportation industry facilities such as high-speed rail usually collect and transport toilet wastewater to sewage treatment plants for centralized treatment, which also has defects. The transportation process may cause wastewater leakage or contamination, increasing the risk of environmental pollution; and the transportation cost is high, it requires a lot of energy, and the treatment load of the treatment plant cannot bear the excessive urine and feces wastewater, resulting in low treatment efficiency. Summary of the invention

[0006] The object of the present invention is to provide a system and method for in-situ treatment and resource utilization of feces and urine in a sewer-free scenario, so as to solve at least one technical problem existing in the above-mentioned background technology.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] The present invention provides a system for in-situ treatment and resource utilization of feces and urine in a sewer-free scenario, comprising: a ceramic membrane system connected to a toilet, wherein the water outlet end of the ceramic membrane system is connected to a membrane distillation system; one end of the ceramic membrane system is also connected to a material recovery box; one end of the membrane distillation system is connected to the material recovery box, and the other end of the membrane distillation system is connected to a recycled water tank.

[0009] Furthermore, the ceramic membrane system includes a ceramic membrane wastewater tank, and a plurality of parallel ceramic membranes installed in the ceramic membrane wastewater tank, wherein the plurality of ceramic membranes are connected to the membrane distillation system; a stirring paddle is also provided at the bottom of the ceramic membrane wastewater tank.

[0010] Furthermore, a dosing device is provided on the pipeline between the toilet and the ceramic membrane system.

[0011] Furthermore, a peristaltic pump is provided between the ceramic membrane system and the membrane distillation system.

[0012] Furthermore, the membrane distillation system includes a membrane distillation box, and a heat exchanger is connected to the water inlet and water outlet of the membrane distillation box; a multi-layer hydrophobic membrane is arranged in the membrane distillation box, and the discharge port of the membrane distillation box is connected to the material recovery box.

[0013] In a second aspect, the present invention provides a method for utilizing the system for in-situ treatment and resource utilization of feces and urine in a non-sewer scene as described in the first aspect, comprising:

[0014] When the toilet generates wastewater, the dosing device starts at the same frequency as the toilet flushing device, and each time an appropriate amount of liquid medicine is discharged into the ceramic membrane wastewater tank along with the generated wastewater;

[0015] After being discharged into the ceramic membrane wastewater tank, the stirring paddle is started to stir it. After sufficient reaction, it is allowed to settle. This can remove the chromaticity, acidify the urine, stabilize the urea and inhibit the odor. At the same time, it can produce a coagulation and precipitation effect on the solid waste and some organic matter in the wastewater.

[0016] After standing for a period of time, the peristaltic pump is started to use negative pressure to suck from the inside of the ceramic membrane to separate the solid and liquid. The clean water produced by the separation is discharged into the membrane distillation system to wait for deep treatment.

[0017] The clean water entering the membrane distillation system is heated, and water vapor is generated on the hot side and permeates the hydrophobic membrane. The water vapor is condensed into recycled water on the cooling side and enters the recycled water tank. The recycled water produced by the deep treatment of the membrane distillation system can remove various pollutants, and the concentrated liquid produced by the membrane distillation system is discharged into the material recovery tank.

[0018] Furthermore, after the ceramic membrane has worked for a period of time, the peristaltic pump is started in reverse, and the clean water produced by separation is used to quickly backwash the ceramic membrane to wash away the dirt attached to the membrane surface, and the solid waste in the ceramic membrane wastewater tank is regularly discharged to the material recovery tank.

[0019] The beneficial effects of the present invention are as follows: the fecal and urine wastewater is stabilized and pretreated through the efficient regulation of pharmaceutical agents, the loss of nutrients such as nitrogen and phosphorus is effectively reduced, and efficient solid-liquid separation is achieved using ceramic membranes to convert solid matter into fertilizers. At the same time, water resources are recovered through membrane distillation technology, which greatly reduces the consumption of water resources and the generation of secondary pollution, and embodies environmental friendliness.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, which will become obvious from the following description, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] Figure 1This is a flow chart of the system and method for in-situ treatment and resource utilization of feces and urine in a sewer-free scenario as described in an embodiment of the present invention.

[0023] Figure 2 This is a main structural diagram of the ceramic membrane system of the system for in-situ treatment and resource utilization of feces and urine in a sewer-free scenario as described in an embodiment of the present invention.

[0024] Figure 3 This is a top view of the structure of a ceramic membrane system for the system for in-situ treatment and resource utilization of feces and urine in a sewer-free scenario as described in an embodiment of the present invention.

[0025] Figure 4 This is a side view of the structure of a ceramic membrane system for the system for in-situ treatment and resource utilization of feces and urine in a sewer-free scenario as described in an embodiment of the present invention.

[0026] Figure 5 This is a structural diagram of a membrane distillation system for the system for in-situ treatment and resource utilization of feces and urine in a sewer-free scenario as described in an embodiment of the present invention.

[0027] Among them: 1-toilet; 2-dosing device; 3-ceramic membrane system; 4-peristaltic pump; 5-membrane distillation system; 6-recycled water tank; 7-material recovery tank; 8-ceramic membrane; 9-stirring paddle. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below by the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention.

[0029] It should be understood by those skilled in the art that unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art to which this invention belongs.

[0030] It should also be understood that terms, such as those defined in commonly used dictionaries, should be understood to have a meaning consistent with that in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless as defined herein.

[0031] Those skilled in the art will appreciate that, unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements and / or groups thereof.

[0032] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0033] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] In the description of this specification, the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present technology and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present technology.

[0035] Unless otherwise clearly specified or limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or integrally connected or set. For ordinary technicians in this field, the specific meanings of the above terms in this technology can be understood according to specific circumstances.

[0036] To facilitate understanding of the present invention, the present invention is further explained below with reference to specific embodiments in conjunction with the accompanying drawings, and the specific embodiments do not constitute a limitation on the embodiments of the present invention.

[0037] Those skilled in the art should understand that the drawings are merely schematic diagrams of embodiments, and the components in the drawings are not necessarily necessary for implementing the present invention.

[0038] Example 1

[0039] like Figures 1 to 5As shown, in this embodiment 1, a system for in-situ treatment and resource utilization of feces and urine in a non-sewer scenario is provided, characterized in that it includes: a ceramic membrane system connected to a toilet, the water outlet of the ceramic membrane system is connected to a membrane distillation system; one end of the ceramic membrane system is also connected to a material recovery box; one end of the membrane distillation system is connected to the material recovery box, and the other end of the membrane distillation system is connected to a reuse water tank. The ceramic membrane system includes a ceramic membrane wastewater tank, and a plurality of parallel ceramic membranes installed in the ceramic membrane wastewater tank, and the plurality of ceramic membranes are connected to the membrane distillation system; a stirring paddle is also provided at the bottom of the ceramic membrane wastewater tank. A dosing device is provided on the pipeline between the toilet and the ceramic membrane system. A peristaltic pump is provided between the ceramic membrane system and the membrane distillation system. The membrane distillation system includes a membrane distillation box, and a heat exchanger is connected to the water inlet and the water outlet of the membrane distillation box; a multi-layer hydrophobic membrane is provided in the membrane distillation box, and the discharge outlet of the membrane distillation box is connected to the material recovery box.

[0040] In this embodiment, the above-mentioned system and method for in-situ treatment and resource utilization of feces and urine in a non-sewer scenario includes the following steps:

[0041] Step 1: Collect human excrement. Collect human excrement containing high organic matter, high suspended solids, and high ammonia nitrogen into a collection tank. This step ensures that all wastewater is centrally treated, which is convenient for subsequent reagent addition and reaction process.

[0042] Step 2: Adding and stirring. Add the compound agent to the wastewater collected by the toilet collector through the dosing box and stir it slowly to make it fully react. On the one hand, the acidic agent can control the pH of the wastewater at 3-5, inhibit the hydrolysis of urea into ammonia and carbon dioxide, reduce ammonia loss and control odor; on the other hand, the coagulant can produce a coagulation and precipitation effect, fix nutrients such as calcium, magnesium, and phosphorus in the form of sediment, and improve the efficiency of solid-liquid separation.

[0043] Step 3: Ceramic membrane filtration. The wastewater after drug addition is pumped into the ceramic membrane filter box, and a flat ceramic membrane filter device with a pore size of 0.1μm is used to perform negative pressure suction filtration on the dirt to perform preliminary separation of solids and liquids. This step achieves visible solid-liquid separation and reduces the color and turbidity of the wastewater, thereby increasing the life of the subsequent membrane distillation device and the water production efficiency. At the same time, the ceramic membrane is backwashed regularly to flush the solid waste attached to the surface of the ceramic membrane into the material recovery box.

[0044] Step 4: Membrane distillation and resource recovery. The water produced by the ceramic membrane enters the membrane distillation device, and water vapor is generated by heating the wastewater. The steam passes through the hydrophobic membrane and condenses on the cooling side to produce water, realizing wastewater reuse. The remaining concentrated liquid rich in nutrients such as urea is discharged into the material recovery box and reused as fertilizer together with solid waste. This step realizes the efficient recovery of water resources and the resource utilization of waste.

[0045] This technology has significant advantages in the treatment of mixed feces and urine. First, human excrement is collected through a sump to ensure that all wastewater is centrally treated, which is convenient for the subsequent addition of reagents and reaction processes. Secondly, by adding composite reagents and stirring steps, the pH value of the wastewater is adjusted, urea is inhibited from hydrolyzing into ammonia and carbon dioxide, ammonia loss is reduced and odor is controlled. At the same time, coagulants can produce a coagulation and precipitation effect, fix nutrients such as calcium, magnesium, and phosphorus by producing solid precipitates, and improve the efficiency of solid-liquid separation. Finally, through the resource recovery steps of ceramic membrane filtration and membrane distillation, efficient reuse of water resources and resource utilization of waste are achieved. In summary, the research and development of this technology for wastewater treatment technology for toilets without sewers can not only solve the current environmental challenges, but also effectively realize the recycling of resources and promote sustainable development.

[0046] Example 2

[0047] like Figure 1 As shown, this embodiment 2 provides a system and method for in-situ treatment and resource utilization of feces and urine in a non-sewer scenario, which is mainly composed of a toilet 1, a dosing device 2, a ceramic membrane wastewater tank 3, a ceramic membrane 8, a peristaltic pump 4, a stirring paddle 9, a membrane distillation system 5, a recycled water tank 6 and a material recovery tank 7. Its purpose is to provide a method for in-situ treatment and resource utilization of toilet wastewater in a non-sewer scenario, so as to reduce the treatment pressure of water plants and related treatment costs.

[0048] In this embodiment, a system and method for treating fecal and urine wastewater based on the above-mentioned dosing and separation device is used, and the specific steps are as follows:

[0049] When the toilet 1 produces wastewater, the dosing device 2 is started at the same frequency as the toilet flushing device, and an appropriate amount of liquid agent is discharged into the ceramic membrane wastewater tank 3 along with the wastewater each time. After being discharged into the ceramic membrane wastewater tank 3, the stirring paddle 9 is started to stir it, and after sufficient reaction, it is allowed to stand and settle, which can remove the chromaticity, acidify urine, stabilize urea and inhibit odor, and at the same time produce a coagulation and precipitation effect on solid waste and some organic matter in the wastewater. After standing for a period of time, the peristaltic pump 4 is started, and the negative pressure is used to suck from the inside of the 0.1μm ceramic membrane 8 to separate the solid and liquid, and the clean water produced by the separation is discharged into the membrane distillation system 5 to wait for deep treatment. After the ceramic membrane 8 has worked for a period of time, the peristaltic pump 4 is reversely started, and the ceramic membrane 8 is quickly backwashed with the clean water produced by the separation to wash away the dirt attached to the membrane surface, and the solid waste in the ceramic membrane wastewater tank 3 is regularly discharged into the material recovery box 7. The clean water entering the membrane distillation system 5 is heated, and water vapor is generated on the hot side and permeates the hydrophobic membrane. The water vapor is condensed on the cooling side into recycled water and enters the recycled water tank 6. The recycled water produced by the deep treatment of the membrane distillation system 5 can remove various pollutants and meet the reuse standard of ISO30500-B type water. The concentrated liquid produced by the membrane distillation system 5 is discharged into the material recovery tank 7, which is rich in nutrients required for plant growth such as nitrogen, phosphorus, calcium, and magnesium, and can be used as fertilizer for returning to the field.

[0050] The above-mentioned treatment system and method mainly include three stages: drug addition pretreatment, ceramic membrane separation and membrane distillation deep treatment.

[0051] Stage 1: Pretreatment by adding drugs. A variety of organic or inorganic acidic agents were used to adjust the wastewater, and it was found that inorganic acidic agents would not introduce new COD and increase the difficulty of membrane treatment while adjusting the pH. Therefore, inorganic acid salts are more suitable as pretreatment agents. The present invention combines inorganic acidic agents with carbon materials for synergistic pretreatment of fecal wastewater, which can stably maintain the pH of the wastewater between 3-5 for more than 7 days, thereby inhibiting the hydrolysis and amination of urea and reducing the odor of the wastewater; at the same time, the rich pore structure of the carbon material can adsorb the chromaticity and some substances, reduce the chromaticity of the wastewater, show a clear state, and improve people's acceptance of the reuse of fecal wastewater; the flocculation effect of the composite agent can flocculate and settle the substances in the wastewater that are easy to clog the ceramic membrane, thereby improving the separation effect of the ceramic membrane.

[0052] Stage 2: Ceramic membrane separation. A flat ceramic membrane capable of negative pressure suction is used to quickly separate the pretreated wastewater into solids and liquids. The average water production rate can reach more than 100 ml / min, which can meet the daily wastewater treatment capacity of each toilet. The ceramic membrane used in the present invention can withstand a suction pressure of -60 Kpa, and can fully withstand the separation of viscous fecal and urine wastewater during the test. This ceramic membrane not only has excellent pressure resistance, but also exhibits excellent chemical stability and corrosion resistance, and can maintain efficient and stable separation effects in complex environments. In addition, its surface has been specially treated to effectively reduce the adhesion of pollutants and achieve a rapid cleaning effect. A fixed cleaning pressure is used in the test, and the attachments can be washed away within 20 seconds of backwashing, which reduces the water consumption of recoil, reduces maintenance costs, and extends the service life.

[0053] Stage three: deep treatment by membrane distillation. The membrane distillation system is used to deeply treat the separated water, which can produce more than 70% recyclable water. At the same time, the nutrients such as nitrogen and phosphorus in the wastewater are concentrated into concentrated fertilizers that can be returned to the field, greatly improving the wastewater treatment efficiency and resource utilization. In the present invention, the clean water produced by ceramic membrane separation is heated to 50°C, and the water vapor produced by the water can pass through the hydrophobic membrane. The low-temperature water in the tap water pipe is used as the condensate, and the water vapor that passes through the membrane is condensed into liquid water for reuse on the condensation side. The water produced by membrane distillation can meet the reuse standard of ISO30500-B type water, with a pH between 6-9, a COD of less than 150mg / L, a TN removal rate of more than 70%, and a TP removal rate of more than 80%. The concentrated liquid remaining after the membrane distillation water production is rich in nutrients and can be discharged into the material recovery box and reused as farmyard manure together with the waste (or solid waste, attachments) intercepted by the ceramic membrane.

[0054] Example 3

[0055] like Figure 1 As shown, the present embodiment provides a system and method for in-situ treatment and resource utilization of feces and urine in a sewer-free scenario, which is mainly composed of a toilet 1, a dosing device 2, a ceramic membrane wastewater tank 3, a ceramic membrane 8, a peristaltic pump 4, a stirring paddle 9, a membrane distillation system 5, a recycled water tank 6 and a material recovery tank 7, etc., and its purpose is to provide an in-situ treatment and resource recycling method for toilet wastewater in an office building, so as to reduce the treatment pressure of the water plant and related treatment costs.

[0056] The toilet wastewater from an office building is collected (including more than 30% flushing water) and discharged into the ceramic membrane wastewater tank 3. The dosing device 2 is started to mix the liquid agent with the wastewater, and the stirring paddle 9 is started to stir it. After sufficient reaction, it is allowed to settle. Then the peristaltic pump 4 is started to suck from the inside of the ceramic membrane 8 by negative pressure to separate the solid and liquid. The clean water produced by the separation is discharged into the membrane distillation system 5 for deep treatment. The dirt attached to the membrane surface is backwashed regularly and discharged into the material recovery tank 7. The clean water entering the membrane distillation system 5 is heated, and water vapor is generated on the hot side to pass through the hydrophobic membrane. The water vapor is condensed into reuse water on the cooling side and enters the reuse water tank 6. The concentrated liquid remaining after the membrane distillation produces water is rich in nutrients and can be discharged into the material recovery tank 7 and reused as farmyard manure together with the ceramic membrane separation product.

[0057] The main water quality characteristics during the test are shown in Table 1 below, which basically meet the reuse standards of ISO30500-B type water.

[0058] Table 1

[0059] COD(mg / L) TP(mg / L) TN(mg / L) pH EC(mS / cm) Raw water quality indicators 5800-11000 300-900 4400-5500 6.8-9.2 9.5-15.6 Water quality indicators after treatment 85-120 0-10 8-86 6.8-8.2 0.3-0.8

[0060] Example 4

[0061] like Figure 1 As shown, this embodiment 4 provides a system and method for in-situ treatment and resource utilization of feces and urine in a non-sewer scenario, which is mainly composed of a toilet 1, a dosing device 2, a ceramic membrane wastewater tank 3, a ceramic membrane 8, a peristaltic pump 4, a stirring paddle 9, a membrane distillation system 5, a recycled water tank 6 and a material recovery tank 7, etc. Its purpose is to provide an in-situ treatment and resource recycling method for the five-sewer toilet wastewater of a factory, so as to reduce the treatment pressure of the water plant and related treatment costs.

[0062] Connect the toilet sewage outlet of a project to Figure 1 In the system shown (containing 10% flushing water), when the toilet 1 produces wastewater, the dosing device 2 is started at the same frequency as the toilet flushing device, and an appropriate amount of liquid agent is discharged into the ceramic membrane wastewater tank 3 together with the produced wastewater each time, and the stirring paddle 9 is started to stir it, and it is allowed to settle after sufficient reaction; then the peristaltic pump 4 is started, and the negative pressure is used to suck from the inside of the ceramic membrane 8 to separate the solid and liquid, and the clean water produced by the separation is discharged into the membrane distillation system 5 for deep treatment, and the dirt attached to the membrane surface is backwashed regularly and discharged into the material recovery tank 7; the clean water entering the membrane distillation system 5 is heated, and water vapor is generated on the hot side to pass through the hydrophobic membrane, and the water vapor is condensed into reuse water on the cooling side and enters the reuse water tank 6; the concentrated liquid remaining after the membrane distillation produces water is rich in nutrients, and can be discharged into the material recovery tank 7 and reused as farmyard manure together with the ceramic membrane separation product.

[0063] The main water quality characteristics during the test are shown in Table 2 below, which basically meet the ISO30500-B water reuse standards.

[0064] Table 2

[0065] COD(mg / L) TP(mg / L) TN(mg / L) pH EC(mS / cm) Raw water quality indicators 7000-12000 700-1500 4100-4900 6.5-8.8 10.8-18.8 Water quality indicators after treatment 22-110 0-10 200-920 6.0-8.5 0.17-2.8

[0066] In summary, the system and method for in-situ treatment and resource utilization of feces and urine in a sewer-free scenario described in the embodiment of the present invention stabilizes and pre-treats feces and urine wastewater through efficient agent regulation, effectively reduces the loss of nutrients such as nitrogen and phosphorus, and uses ceramic membranes to achieve efficient solid-liquid separation, converting solid matter into fertilizers. At the same time, water resources are recovered through membrane distillation technology, which greatly reduces the consumption of water resources and the generation of secondary pollution, and reflects environmental friendliness. The treatment system is not only simple in design and easy to operate, but also improves the treatment efficiency and water purity through integrated and modular construction, ensuring the quality of the effluent. During long-term operation, its efficient resource recovery capability can save users a lot of operating costs and improve cost-effectiveness. In addition, the system has strong adaptability and is widely applicable to human excrement wastewater treatment scenarios, showing strong universality and promotion value. Most importantly, this solution is in line with the concept of sustainable development, promotes a win-win situation between ecology and economy, and is of great significance to promoting a green circular economy. In addition to the above advantages, this technology can also be applied to all scenes without sewers, such as high-speed trains, airplanes, ships, outdoor venues and temporary construction sites, etc., and has broad application potential and value. These scenes usually lack traditional sewage treatment facilities, and the in-situ treatment solution provided by the present invention can effectively solve this problem, providing clean and environmentally friendly sanitary facilities for these scenes while realizing resource recycling. Therefore, the present invention has broad application prospects in scenes without sewers and has important social and environmental significance.

[0067] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative work on the basis of the technical solution disclosed in the present invention should be included in the scope of protection of the present invention.

Claims

1. A system for in-situ treatment and resource utilization of feces and urine in a non-sewer scene, characterized in that: include: A ceramic membrane system connected to the toilet, wherein the water outlet of the ceramic membrane system is connected to a membrane distillation system; one end of the ceramic membrane system is also connected to a material recovery tank; one end of the membrane distillation system is connected to the material recovery tank, and the other end of the membrane distillation system is connected to a recycled water tank.

2. The system for in-situ treatment and resource utilization of feces and urine in a non-sewer scene according to claim 1 is characterized in that: The ceramic membrane system comprises a ceramic membrane wastewater tank and a plurality of parallel ceramic membranes installed in the ceramic membrane wastewater tank, wherein the plurality of ceramic membranes are connected to the membrane distillation system; a stirring paddle is also provided at the bottom of the ceramic membrane wastewater tank.

3. The system for in-situ treatment and resource utilization of feces and urine in a non-sewer scene according to claim 2 is characterized in that: A dosing device is provided on the pipeline between the toilet and the ceramic membrane system.

4. The system for in-situ treatment and resource utilization of feces and urine in a non-sewer scene according to claim 1 is characterized in that: A peristaltic pump is arranged between the ceramic membrane system and the membrane distillation system.

5. The system for in-situ treatment and resource utilization of feces and urine in a non-sewer scene according to claim 1 is characterized in that: The membrane distillation system comprises a membrane distillation box, and a heat exchanger is connected to the water inlet and the water outlet of the membrane distillation box; a multi-layer hydrophobic membrane is arranged in the membrane distillation box, and the discharge outlet of the membrane distillation box is connected to the material recovery box.

6. A method for utilizing the system for in-situ treatment and resource utilization of feces and urine in a non-sewer scene as described in any one of claims 1 to 5, characterized in that: include: When the toilet generates wastewater, the dosing device starts at the same frequency as the toilet flushing device, and each time an appropriate amount of liquid medicine is discharged into the ceramic membrane wastewater tank along with the generated wastewater; After being discharged into the ceramic membrane wastewater tank, the stirring paddle is started to stir it. After sufficient reaction, it is allowed to settle. This can remove the chromaticity, acidify the urine, stabilize the urea and inhibit the odor. At the same time, it can produce a coagulation and precipitation effect on the solid waste and some organic matter in the wastewater. After standing for a period of time, the peristaltic pump is started to use negative pressure to suck from the inside of the ceramic membrane to separate the solid and liquid. The clean water produced by the separation is discharged into the membrane distillation system to wait for deep treatment. The clean water entering the membrane distillation system is heated, and water vapor is generated on the hot side and permeates the hydrophobic membrane. The water vapor is condensed into recycled water on the cooling side and enters the recycled water tank. The recycled water produced by the deep treatment of the membrane distillation system can remove various pollutants, and the concentrated liquid produced by the membrane distillation system is discharged into the material recovery tank.

7. The method according to claim 6, characterized in that After the ceramic membrane has been working for a period of time, the peristaltic pump is started in reverse, and the clean water produced by separation is used to quickly backwash the ceramic membrane to wash away the dirt attached to the membrane surface, and the solid waste in the ceramic membrane wastewater tank is regularly discharged into the material recovery tank.

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