CN114538968A - Method for resource utilization of excrement - Google Patents
Method for resource utilization of excrement Download PDFInfo
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- CN114538968A CN114538968A CN202210025767.4A CN202210025767A CN114538968A CN 114538968 A CN114538968 A CN 114538968A CN 202210025767 A CN202210025767 A CN 202210025767A CN 114538968 A CN114538968 A CN 114538968A
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F3/00—Fertilisers from human or animal excrements, e.g. manure
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/10—Solid or semi-solid fertilisers, e.g. powders
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/20—Liquid fertilisers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
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- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Fertilizers (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to the field of resource deep utilization, in particular to a method for resource utilization of excrement. The method comprises the steps of using a feeding storage tank, a solid-liquid separation chamber, a liquid homogenizing tank, an ozone contact tank, a liquid fertilizer extraction tank, a liquid fertilizer storage tank and a solid fertilizer manufacturing bin; comprises the following steps: the feeding, storage and quality improvement process comprises the following steps: solid-liquid separation process: the liquid fertilizer extraction process comprises the following steps: drying the solid fertilizer: from the economic perspective, compared with the traditional manure methane fermentation technology: the treatment process is simple, the number of facilities and equipment is small, the investment is low, the occupied area is small, the operation management is simple, and the operation cost is low.
Description
Technical Field
The invention relates to the field of resource deep utilization, in particular to a method for resource utilization of excrement.
Background
The method comprises the steps of taking dung and fertilizer and separation and solid and liquid as key words to conduct abstract query in a Chinese patent publication system, and querying 18 related patents; the 18 patents were analyzed and are not inconsistent with this patent.
By taking dung and fertilizer and separation and solid and liquid and ozone as key words, abstract inquiry is carried out in a Chinese patent publication system, and related patents are not inquired;
by taking dung and fertilizer and separation and solid and liquid and elements as key words, abstract inquiry is carried out in a Chinese patent publication system, and related patents are not inquired;
by taking dung and fertilizer and separation and solid and liquid and lack as key words, abstract inquiry is carried out in a Chinese patent publication system, and related patents are not inquired;
CN 113185329A-an environment-friendly organic fertilizer production system and process thereof, CN 112358350A-a cultivation waste harmless treatment method, CN 112299901A-a cow dung rapid fermentation method and product thereof, CN 109608290A-a rabbit dung organic fertilizer fermentation preparation method, and solid-liquid separation after fermentation is shown;
the method carries out completely different solid-liquid treatment according to the condition requirements; and has perfect hardening and tempering procedures.
CN 110183031A-a high concentration beasts and birds cultivation waste water and excrement sediment cooperative processing system and processing method is showing to use the ammonia nitrogen to blow off the tower, has removed some useful elements, does not fully utilize ammonia nitrogen element.
With the rapid development of animal husbandry in China and the improvement of the standard of breeding environment, the amount of livestock and poultry manure and breeding wastewater is greatly increased, the discharge ratio of COD and NH4+ -N from the livestock and poultry breeding wastewater is also increased year by year, and a large amount of livestock and poultry manure and wastewater not only causes partial water eutrophication, but also increases the burden of sewage treatment plants.
The supernatant of the urban septic tank is mixed with urban sewage for treatment, which also increases the burden of a sewage treatment plant, and meanwhile, the periodically extracted excrement sediment has high treatment cost, and substances which cannot be treated and utilized are not reasonably removed along with the elimination of a garbage landfill mode, so that the sludge can possibly become a new pollution source.
The manure contains fertilizers required by crop growth, particularly nitrogen, phosphorus and other nutrients with high content
Due to the imperfect treatment scale and treatment technology, the manure can not reach the treatment targets of harmless treatment and full-quantitative manure returning.
The fecal sewage treatment technology mainly comprises the following four technologies: firstly, natural fermentation treatment, secondly padding fermentation bed treatment, thirdly methane engineering treatment and fourthly organic fertilizer production; the first two technologies are mainly used for breeding free-range or medium-small live pigs and meat poultry; the latter two techniques are used for feeding large and medium-sized livestock and poultry.
Disclosure of Invention
The purpose of the invention is as follows: in order to provide a method for resource utilization of excrement, the concrete purpose is seen in a plurality of substantial technical effects of the concrete implementation part.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for recycling excrement, which is characterized in that,
the method comprises the steps of using a feeding storage tank, a solid-liquid separation chamber, a liquid homogenizing tank, an ozone contact tank, a liquid fertilizer extraction tank, a liquid fertilizer storage tank and a solid fertilizer manufacturing bin;
comprises the following steps:
the feeding, storage and quality improvement process comprises the following steps: the concentrated and collected manure raw liquid is input into a feeding regulation and storage tank and is fully mixed with the reflux liquid from the liquid homogenizing tank, fertilizer nutrient elements contained in solid particles in the manure raw liquid are further dissolved, and meanwhile, the lacking fertilizer elements are added through a fertilizer element adding system according to detection data of raw materials of each batch;
solid-liquid separation process: the solid-liquid mixture after the quality adjustment is subjected to solid-liquid separation by solid-liquid separation equipment, the separated liquid mixture is input into a liquid homogenizing pool, and the solid-liquid mixture is input into a solid fertilizer manufacturing bin;
the liquid fertilizer extraction process comprises the following steps: the liquid mixture entering the liquid homogenizing pool is input into an ozone contact pool, is fully contacted and oxidized with ozone, then enters a liquid fertilizer extraction pool, is filtered by a catalytic ceramic membrane group, and is input into a liquid fertilizer storage pool through an output pump to be further cured into liquid organic fertilizer;
drying the solid fertilizer: the solid-liquid mixture is mixed with the input high-temperature aerobic thermophilic bacteria in the solid fertilizer drying bin, oxygen in the air is fed by the ventilation system, organic matters contained in the solid-liquid mixture release a large amount of heat energy in the decomposition process of the high-temperature thermophilic bacteria, water in the solid-liquid mixture is heated and evaporated into water vapor, the water vapor is discharged through the ventilation system, and the solid-liquid mixture is gradually dried into the solid fertilizer.
The invention further adopts the technical scheme that after the solid fertilizer drying process, a biological deodorization process is also included, wherein the biological deodorization process is to collect odor emitted from each link of the manure treatment to a biological deodorization system for standard emission.
The invention further adopts the technical scheme that equipment for removing large-particle impurities in the manure mixture is arranged in the feeding storage tank, and the equipment for removing the large-particle impurities in the manure mixture is a rotary drum grating.
The invention further adopts the technical scheme that solid-liquid separation equipment is arranged in the solid-liquid separation room, and the solid-liquid separation equipment adopts either one or two modes of roller dehydration or plate-frame dehydration.
The invention further adopts the technical scheme that the solid fertilizer manufacturing bin is provided with a ventilation system, and the ventilation system is provided with a blower and an exhaust fan.
The invention has the further technical scheme that a reflux pump is arranged in the liquid homogenizing pool; an ozone catalytic oxidation device is arranged in the ozone contact tank; the liquid fertilizer extraction tank is provided with a catalytic ceramic membrane group and a water outlet pump, a backwashing pump and an aeration fan which are matched with the catalytic ceramic membrane group.
The invention further adopts the technical scheme that the system further comprises an automatic control system, and the automatic control system can realize the linkage of starting and stopping of the equipment in each process and can be arranged in a more practical way.
A device for resource utilization of feces is characterized by comprising a feeding storage tank, a solid-liquid separation chamber, a liquid homogenizing tank, an ozone contact tank, a liquid fertilizer extraction tank, a liquid fertilizer storage tank and a solid fertilizer manufacturing bin;
the feeding regulation and storage tank is connected with a feeding pipeline, the feeding regulation and storage tank is connected with a solid-liquid separation chamber through a pipeline, the solid-liquid separation chamber is connected with a liquid homogenizing tank through a pipeline, and the solid-liquid separation chamber is also connected with a solid fertilizer manufacturing bin through a pipeline; the liquid homogeneity pond is connected ozone contact oxidation pond through the pipeline, and ozone contact oxidation pond is connecting liquid through the pipeline and is drawing the pond, and liquid is drawing the pond and is connecting liquid fertile storage pool through the pipeline, and liquid fertile storage pool contains the discharging pipe.
The invention further adopts the technical scheme that the solid fertilizer bin also comprises a bin body ventilation system, wherein the bin body ventilation system comprises a fan, and an air exhaust port of the fan is connected with the solid fertilizer making bin for exhausting air; the port of the fan air outlet is connected with the solid fertilizer manufacturing bin for air supply.
The invention further adopts the technical scheme that a port for exhausting air of the fan is also connected with a liquid homogenizing pool, an ozone contact pool, a liquid fertilizer extraction pool and a liquid fertilizer storage pool for extracting odor.
The invention further adopts the technical scheme that a port for exhausting air of the fan is also connected with a condensing device, and the condensing device can condense moisture in saturated high-temperature water vapor in the air.
The invention has the further technical scheme that the condensing device is also connected with a deodorization system.
The invention has the further technical scheme that the deodorization system is also connected with a feeding storage tank through a pipeline.
The invention adopts the technical scheme to realize the adjustment of the air supply and exhaust fans of the ventilation system by the data fed back by the temperature and humidity monitoring equipment in the solid fertilizer drying bin, and has the following beneficial effects compared with the prior art:
from the technical perspective, compared with the traditional manure methane fermentation technology:
the solid-liquid separation technology is utilized to separate the liquid manure into the solid manure raw material and the liquid manure raw material, so that the problem that the liquid manure can reach the standard and then is discharged after sewage treatment in the traditional manure treatment technology is solved, and the construction investment and the operation cost are greatly reduced;
the technology of 'ozone contact oxidation + novel catalytic nano ceramic ultrafiltration membrane' is utilized to remove residual Endocrine Disruptors (EDCs), antibiotics and other novel pollutants in the liquid manure, so that the pollutants seriously harming human health can not enter a food chain any more, and the quality and safety of the liquid manure are really improved.
Various toxic and harmful pollen, bacteria, viruses, microorganisms and the like in the liquid fertilizer are removed by utilizing the interception effect pair of the novel nano ceramic ultrafiltration membrane, so that the liquid fertilizer cannot be reproduced in the liquid fertilizer, and the biological safety of the liquid fertilizer is ensured;
by utilizing the larger aperture of the novel nano ceramic ultrafiltration membrane, nutrient substances such as urea, amino acid, polypeptide, fatty amine, organic alkali and the like in the excrement stock solution enter the liquid fertilizer, and the absorbability of the nutrient elements in the liquid fertilizer is improved.
By utilizing a high-temperature aerobic drying technology, heat released by high-temperature aerobic microbial flora when degrading organic matters in garbage is utilized to form a continuous and stable high-temperature (about 70 ℃) environment in a drying bin by depending on biological energy contained in the organic matters in the solid manure, so that the solid organic fertilizer is cured, and the absorbability of nutrient elements in the solid fertilizer is improved; secondly, insect eggs, pathogenic bacteria, weed seeds and the like in the solid manure are killed, and the biological safety of the solid manure is improved; and thirdly, moisture in the solid organic fertilizer is removed, so that the solid organic fertilizer is more convenient to store and transport.
The high-temperature environment formed in the high-temperature aerobic drying bin keeps the organic fertilizer property of the livestock and poultry manure to the maximum extent; avoids greatly destroying the organic fertilizer property of the livestock and poultry manure in the process of methane fermentation, and solves the problems of difficult operation of anaerobic fermentation facilities in winter, difficult methane residue treatment, poor fertilizer effect and difficult wastewater treatment.
When the water content in the manure raw materials entering the factory is too high and the nutrient elements can not meet the national relevant organic fertilizer standard, the stable standard of the produced solid organic fertilizer and liquid organic fertilizer can be ensured by a method of supplementing and adding the lacking nutrient elements.
From the economic perspective, compared with the traditional manure methane fermentation technology: the treatment process is simple, the number of facilities and equipment is small, the investment is low, the occupied area is small, the operation management is simple, and the operation cost is low.
From the aspects of environmental protection and safety, firstly, odor and the like generated in the whole process of the whole manure treatment can be treated through a high-temperature aerobic biological drying process and a professional biological deodorization link, and then the discharged gas can be ensured to reach the standard; secondly, no wastewater is generated in the whole process of the manure treatment, and the risk that the discharged wastewater does not reach the standard is avoided; thirdly, the problem that the traditional biogas process has large potential safety hazard in the operation process is solved.
Drawings
To further illustrate the present invention, further description is provided below with reference to the accompanying drawings:
FIG. 1 is a flow chart of the invention.
Detailed Description
The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the invention and not as limiting the scope of the invention.
The patent provides a plurality of parallel schemes, and different expressions belong to an improved scheme based on a basic scheme or a parallel scheme. Each solution has its own unique features. In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other. The fixing means, which is not described herein, may be any one of screw fixing, bolt fixing, or glue bonding. The parts are connected by pipes, and the common knowledge belongs to the technical field.
The first embodiment is as follows: in conjunction with FIG. 1; a method for recycling feces comprises a feeding storage tank, a solid-liquid separation chamber, a liquid homogenizing tank, an ozone contact tank, a liquid fertilizer extraction tank, a liquid fertilizer storage tank and a solid fertilizer manufacturing chamber, wherein equipment for removing large-particle impurities in a feces mixture, such as a rotary drum grating, is arranged in the feeding storage tank; the solid-liquid separation chamber is internally provided with solid-liquid separation equipment which can be roller dehydration or plate-frame dehydration and matched equipment thereof; the solid fertilizer manufacturing bin is provided with a ventilation system, a blower and an exhaust fan; a reflux pump is arranged in the liquid homogenizing pool; an ozone aeration device is arranged in the ozone contact tank; the liquid fertilizer extraction tank is provided with a novel catalytic ceramic membrane group and a water outlet pump, a backwashing pump, an aeration fan and the like which are matched with the catalytic ceramic membrane group; the process for recycling the feces also comprises a biological deodorization system and an automatic control system.
Rotary drum type grating is also named as microfilter and is a common device at present;
the roller dehydration refers to a pair roller extrusion dehydration device, and can refer to environment-friendly pair roller extrusion devices of Shandong Kesheng, Shandong Jinyangyang extrusion, and the like.
The plate frame dehydration refers to a plate frame filter press manufactured by manufacturers of Guangzhou Xindi, Shandong Jingjin and the like through filter cloth compression dehydration equipment among plate frames.
The novel catalytic ceramic membrane group is a functional flat ultrafiltration membrane which is made of main materials such as aluminum oxide, titanium oxide and zirconium oxide, can completely intercept escherichia coli and the like, and can refer to a Huayuan ceramic flat membrane. The corresponding matched water outlet pump and backwashing pump are a centrifugal water pump with parameters meeting the design requirements, and the aeration fan and the like can refer to a centrifugal fan with parameters meeting the design requirements.
A method for recycling excrement is characterized in that the process device and equipment are utilized, and the method comprises the following steps:
the process of feeding, regulation, storage and quality improvement: removing large-particle impurities from the concentrated and collected excrement raw liquid (the solid content is less than or equal to 5%) by using equipment such as a grating and the like, inputting the excrement raw liquid into a feeding and storage tank, fully mixing the excrement raw liquid with the reflux liquid from a liquid homogenizing tank, and further dissolving fertilizer nutrient elements contained in solid particles in the excrement raw liquid;
solid-liquid separation process: solid-liquid separation is carried out on the solid-liquid mixture after the quality adjustment through dewatering equipment, the separated liquid mixture is input into a liquid homogenizing pool, and the solid-liquid mixture (the water content is less than or equal to 70 percent) is input into a solid fertilizer manufacturing bin;
the liquid fertilizer extraction process comprises the following steps: the liquid mixture entering the liquid homogenizing pool is input into an ozone contact pool, fully contacted with ozone and then enters a liquid fertilizer extraction pool, and then is filtered by a novel catalytic ceramic membrane group and is input into a liquid fertilizer storage pool through a water outlet pump to be further cured into liquid organic fertilizer;
drying the solid fertilizer: the solid-liquid mixture (the water content is less than or equal to 70 percent) is mixed with the input high-temperature thermophilic bacteria in the solid fertilizer drying bin, oxygen in the air is sent by the ventilation system, organic matters contained in the solid-liquid mixture release a large amount of heat energy in the decomposition process of the high-temperature thermophilic bacteria, water in the solid-liquid mixture is heated and evaporated into water vapor and then is discharged by the exhaust system, and the solid-liquid mixture is gradually dried into the solid fertilizer (the water content is less than or equal to 250 percent);
example two: as a further improved scheme or a parallel scheme or an optional independent scheme, the biological deodorization system collects odor emitted by each link of the fecal sewage treatment to the biological deodorization system for treatment and standard emission;
example three: as a further improved scheme or a parallel scheme or a selectable independent scheme, the automatic control system can realize the linkage of starting and stopping of the devices in the processes, and can further realize the adjustment of the air delivery and exhaust fans of the ventilation system through the data fed back by the temperature and humidity monitoring devices arranged in the solid fertilizer drying bin.
Example four: as a further improved scheme or a parallel scheme or a selectable independent scheme, the device for recycling the excrement is characterized by comprising a feeding regulation and storage tank, a solid-liquid separation chamber, a liquid homogenizing tank, an ozone contact tank, a liquid fertilizer extraction tank, a liquid fertilizer storage tank and a solid fertilizer manufacturing bin;
the feeding regulation and storage tank is connected with a feeding pipeline, the feeding regulation and storage tank is connected with a solid-liquid separation room through a pipeline, the solid-liquid separation room is connected with a liquid homogenization tank through a pipeline, and the solid-liquid separation room is also connected with a solid fertilizer production bin through a pipeline; the liquid homogeneity pond is connected ozone contact oxidation pond through the pipeline, and ozone contact oxidation pond is connecting liquid through the pipeline and is drawing the pond, and liquid is drawing the pond and is connecting liquid fertile storage pool through the pipeline, and liquid fertile storage pool contains the discharging pipe. The technical scheme of the invention has the following substantial technical effects and the realization process: the present embodiment provides specific plumbing connections and basic connections for implementing the various operations of the first to third embodiments.
Example five: as a further improved scheme or a parallel scheme or a selectable independent scheme, the fertilizer bin further comprises a bin body ventilation system, the bin body ventilation system comprises a fan, and an air exhaust port of the fan is connected with the solid fertilizer manufacturing bin for exhausting air; the port of the fan air outlet is connected with the solid fertilizer manufacturing bin for air supply. The technical scheme of the invention has the following substantial technical effects and the realization process: see the attached drawings, which mainly refer to the gas flow for the solid manure bin.
Example six: as a further improved scheme or a parallel scheme or an optional independent scheme, the air draft port of the fan is also connected with a liquid homogenizing pool, an ozone contact pool, a liquid fertilizer extraction pool and a liquid fertilizer storage pool for extracting odor. The technical scheme of the invention has the following substantial technical effects and the realization process: the fan is connected with a plurality of ponds simultaneously through parallel calandria and a plurality of valves, and then realizes multi-system convulsions deodorization. It should be noted that a plurality of valves can be selectively opened, and specific implementation depends on specific process requirements.
Example seven: as a further improvement scheme or a parallel scheme or an optional independent scheme, a condensing device is connected to an air outlet port of the fan, and the condensing device can condense moisture in saturated high-temperature water vapor in the gas. The technical scheme of the invention has the following substantial technical effects and the realization process: therefore, the water can be removed, and the drying of the whole gas moisture is ensured. The condensed water and the heat of the heat exchange can also be used for other purposes, for example, the condensed water can be returned to each required pool.
Example eight: as a further development or in parallel or alternatively independently, the condensation device is also connected to a deodorization system. The technical scheme of the invention has the following substantial technical effects and the realization process: the deodorization system can be an adsorption system of activated carbon or a deodorization pool used for adsorbing some gases with pungent odor. Such as an acidic or basic bath, etc. And may even be a clean elution column.
Example nine: as a further development or in parallel or alternatively independently, the deodorization system is also connected to the feed reservoir via a pipe. The technical scheme of the invention has the following substantial technical effects and the realization process: the foul gas emitted from the feed storage tank can also be purified and deodorized.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and the invention is to be limited to the embodiments described above.
Claims (7)
1. A method for recycling excrement and sewage, which is characterized in that,
the method comprises the steps of using a feeding storage tank, a solid-liquid separation chamber, a liquid homogenizing tank, an ozone contact tank, a liquid fertilizer extraction tank, a liquid fertilizer storage tank and a solid fertilizer manufacturing bin;
comprises the following steps:
the feeding, storage and quality improvement process comprises the following steps: the concentrated and collected manure raw liquid is input into a feeding regulation and storage tank and is fully mixed with the reflux liquid from the liquid homogenizing tank, fertilizer nutrient elements contained in solid particles in the manure raw liquid are further dissolved, and meanwhile, the lacking fertilizer elements are added through a fertilizer element adding system according to detection data of raw materials of each batch;
solid-liquid separation process: the solid-liquid mixture after the quality adjustment is subjected to solid-liquid separation by solid-liquid separation equipment, the separated liquid mixture is input into a liquid homogenizing pool, and the solid-liquid mixture is input into a solid fertilizer manufacturing bin;
the liquid fertilizer extraction process comprises the following steps: the liquid mixture entering the liquid homogenizing pool is input into an ozone contact pool, is fully contacted and oxidized with ozone, then enters a liquid fertilizer extraction pool, is filtered by a catalytic ceramic membrane group, and is input into a liquid fertilizer storage pool through an output pump to be further cured into liquid organic fertilizer;
drying the solid fertilizer: the solid-liquid mixture is mixed with the input high-temperature aerobic thermophilic bacteria in the solid fertilizer drying bin, oxygen in the air is fed by the ventilation system, organic matters contained in the solid-liquid mixture release a large amount of heat energy in the decomposition process of the high-temperature thermophilic bacteria, water in the solid-liquid mixture is heated and evaporated into water vapor, the water vapor is discharged through the ventilation system, and the solid-liquid mixture is gradually dried into the solid fertilizer.
2. The method of claim 1, further comprising a biological deodorization process after the solid-state manure drying process, wherein the biological deodorization process collects odor emitted from each step of manure treatment to a biological deodorization system for standard emission.
3. The method for recycling excrement according to claim 1, wherein the feeding storage tank is provided with a device for removing large-particle impurities in the excrement mixture, and the device for removing large-particle impurities in the excrement mixture is a rotating-drum grating.
4. The method for recycling excrement according to claim 1, wherein a solid-liquid separation device is disposed in said solid-liquid separation chamber, and said solid-liquid separation device adopts either or both of roller dewatering and plate-frame dewatering.
5. The method for recycling manure as claimed in claim 1, wherein the solid manure preparation bin is provided with a ventilation system, and the ventilation system is provided with a blower and an exhaust fan.
6. The method for recycling excrement according to claim 1, wherein a reflux pump is disposed in said liquid homogenizing pool; an ozone catalytic oxidation device is arranged in the ozone contact tank; the liquid fertilizer extraction tank is provided with a catalytic ceramic membrane group and a water outlet pump, a backwashing pump and an aeration fan which are matched with the catalytic ceramic membrane group.
7. The method for recycling excrement according to claim 1, further comprising an automatic control system, wherein the automatic control system can realize the linkage of start and stop of the devices in the processes, and can further realize the adjustment of the ventilation system and the exhaust fan through the data fed back by the temperature and humidity monitoring device arranged in the solid-state fertilizer drying chamber.
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