Dual-function method and equipment for reducing salt content of kitchen waste and producing bio-organic fertilizer

Abstract

The present application relates to the technical field of bio-organic fertilizer, in particular to a dual-function method and equipment for reducing salt content of kitchen waste and producing bio-organic fertilizer; the oil and salt content in waste liquid is reduced by salt-tolerant microbial groups and potassium-dissolving, phosphorus-dissolving and nitrogen-fixing bacterial groups, and bio-available organic fertilizer is produced. The present application can effectively convert kitchen waste liquid into bio-organic fertilizer and realize salt recovery by treating kitchen waste liquid, thereby improving the efficiency of kitchen waste treatment, reducing environmental pollution, and improving the recycling rate of resources, which has important significance for promoting sustainable development.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bio-organic fertilizer, in particular to a dual-function method and equipment for reducing salt content of kitchen waste and producing bio-organic fertilizer. BACKGROUND

[0002] With the acceleration of urbanization and the increase of population, the amount of kitchen waste is increasing year by year, causing serious environmental problems. Kitchen waste not only occupies a major part of municipal solid waste, but also produces odor and breeds bacteria during stacking, affecting the surrounding environment and residents' health. Therefore, how to effectively treat kitchen waste and reduce its impact on the environment has become a problem to be solved.

[0003] Traditional methods for treating kitchen waste mainly include landfill, incineration and composting. Although these methods can reduce the volume of waste to some extent, they have defects such as environmental pollution, resource waste and high energy consumption. In addition, household kitchen waste often contains a large amount of water, and the liquid waste is directly discharged without treatment, which may cause secondary pollution to water bodies.

[0004] In recent years, microbial treatment technology has been gradually introduced into the field of kitchen waste treatment. By utilizing the characteristics of microorganisms, not only can the organic matter in kitchen waste be effectively degraded and converted into harmless substances, but also the environmental burden during the treatment process can be reduced. However, the waste liquid produced by microbial treatment still contains a part of salt, nitrogen and phosphorus compounds and other components. If these components are not properly treated, they may still have an impact on the environment. SUMMARY

[0005] In view of the above shortcomings of the prior art, the present application provides a dual-function method and equipment for reducing salt content of kitchen waste and producing bio-organic fertilizer. By treating the kitchen waste liquid, the kitchen waste liquid can be effectively converted into bio-organic fertilizer and salt can be recovered, thereby improving the efficiency of kitchen waste treatment, reducing environmental pollution, and improving the recycling rate of resources, which is of great significance for promoting sustainable development. The specific scheme is as follows:

[0006] A dual-function method for reducing salt content of kitchen waste and producing bio-organic fertilizer, comprising the following steps:

[0007] S1: using a solid-liquid separation device to separate the waste liquid inside the kitchen waste, and collecting the obtained waste liquid and solid material separately;

[0008] S2: using a magnetic pump to pump the waste liquid into a double-layer structure first fermentation tank, so that the waste liquid is located in the inner layer structure of the first fermentation tank, and water is added into the outer layer structure of the first fermentation tank, and a circulating heating system is used to heat the water in the outer layer structure to sterilize the waste liquid, and the sterilized waste liquid is naturally cooled;

[0009] S3: inoculate the salt-tolerant bacteria group into the first fermentor at a ratio of 2% (v / v), and react for 5-7 days in an environment of 30-40 DEG C while stirring is performed by a stirring device, and when the pH value of the waste liquid is 7.5, the waste liquid is left to stand for 1-2 days to obtain the salt-tolerant bacteria fertilizer;

[0010] S4: remove the salt-tolerant bacteria group from the first fermentor, heat the water in the outer structure of the first fermentor to sterilize the waste liquid, and then pump the waste liquid into the second fermentor with a double-layer structure by a magnetic pump, so that the waste liquid is located in the inner structure of the second fermentor, and then inoculate the growth-promoting bacteria group into the second fermentor at a ratio of 2% (v / v) of the waste liquid, and react for 5-7 days in an environment of 30-40 DEG C while stirring is performed by a stirring device, and the pH value of the waste liquid is kept at 7.5, and the waste liquid is left to stand for 1-2 days to obtain the biological bacteria fertilizer;

[0011] S5: pump the waste liquid in the second fermentor into a decolorizing tank by a magnetic pump, add 10% (w / v) of activated carbon powder, 3-5% (w / v) of alum and a flocculating agent into the waste liquid, and stir for 12 hours by a stirring device to obtain supernatant;

[0012] S6: pump the supernatant into a PP membrane device by a stainless steel pump, remove suspended particles and part of colloids in the supernatant by the PP membrane device, and then pump the supernatant through the PP membrane device into an ultrafiltration device, a nanofiltration device and a reverse osmosis device in sequence by a diaphragm pump for further treatment to obtain a concentrated salt liquid.

[0013] As a preferred mode of the present application, the salt-tolerant bacteria group is mixed by five strains, which are Nocardiopsis dassonvillei sp. dassonvillei, Microbacterium qingdaoense, Bacillus amyloliquefaciens, Pristina aerobia and Marinilabiliaceae bacterium.

[0014] As a preferred mode of the present application, the growth-promoting bacteria group is mixed by potassium-dissolving bacteria, phosphorus-dissolving bacteria and nitrogen-fixing bacteria; wherein the potassium-dissolving bacteria include Bacillus velezensis, Bacillus siamensis and Bacillus karbilensis;

[0015] The phosphorus-dissolving bacteria include Microsphaeropsis oleicola and Olivibacter oleivorans;

[0016] The nitrogen-fixing bacteria include Microsphaeropsis thailandica, Pseudomonas boreopolis and Microsphaeropsis citri.

[0017] As a preferred mode of the present application, the strains in the salt-tolerant bacteria group and the growth-promoting bacteria group are activated by LB culture medium.

[0018] The strains in the salt-tolerant bacteria group and the growth-promoting bacteria group need to be amplified and cultured in the culture medium before being cultured.

[0019] As a preferred mode of the present application, the reaction temperature in the fermentation process of the first and second fermentors is 35℃.

[0020] The top of the first and second fermentors is provided with an air pump for aeration of the waste liquid in the first and second fermentors, the rejection rate of the reverse osmosis device is ≥90%, and the operating pressure is 1.5-2.5 MPa.

[0021] As a preferred mode of the present application, in step S2, the heating temperature of the intermediate water in the outer layer structure is 90℃, and after maintaining this temperature for 1h, the circulating heating system is turned off, and the waste liquid in the first fermentor is naturally cooled to 35℃;

[0022] In step S3, the stirring device operates at a speed of 200 rpm / min;

[0023] In step S4, the heating temperature of the intermediate water in the outer layer structure of the first fermentor is 90℃, and after maintaining this temperature for 1h, the circulating heating system is turned off, and the waste liquid in the first fermentor is naturally cooled to 35℃;

[0024] And the stirring device operates at a speed of 200 rpm / min in step S4.

[0025] A dual-function device for reducing the salt content of kitchen waste and producing bio-organic fertilizer, which is suitable for the dual-function method for reducing the salt content of kitchen waste and producing bio-organic fertilizer described above;

[0026] The first fermentor comprises an inner cylinder, a cylinder cover is installed at the top of the inner cylinder, and an outer separation layer is fixedly installed outside the inner cylinder.

[0027] A flow-out device is installed at the bottom of the inner cylinder, a barrier layer is provided at the top of the flow-out device, and the barrier layer is fixedly installed in the inner cylinder, and the top of the barrier layer is arc-shaped.

[0028] The flow-out device comprises an arc-shaped bin, and the bottom of the arc-shaped bin is flat; an outlet pipe is installed at the bottom of the arc-shaped bin, and a first valve is installed in the outlet pipe.

[0029] An annular arc plate is fixedly connected in the arc-shaped bin, and a gap is left between the annular arc plate and the arc-shaped bin; a leakage groove is formed in the surface of the annular arc plate, and a filter screen is installed in the leakage groove.

[0030] A conduit is rotatably installed in the middle of the barrier layer; a drive shaft is fixedly connected to the top of the conduit, and the drive shaft extends above the cylinder cover and is connected to a motor.

[0031] The outer ring of the conduit is fixedly connected with an arc-shaped plate, and a flow channel is formed in the arc-shaped plate; a plurality of missing grooves are formed on the surface of the outer ring of the conduit and communicate with the flow channel;

[0032] A fixed pipe is arranged below the conduit and is fixedly connected with the arc-shaped bin through an L-shaped plate; the conduit rotates in the fixed pipe; a first electromagnetic valve is installed in the fixed pipe;

[0033] A plurality of suction pumps are installed at the bottom of the outer layer; a bottom pipe extends from the bottom of the suction pump; two suction pipes are installed on the bottom pipe, the upper suction pipe extends to above the filter screen through the annular arc plate, and the lower suction pipe extends to between the annular arc plates and is aligned with the filter screen; a second electromagnetic valve is installed in each of the two suction pipes;

[0034] A top pipe is installed at the top of the suction pump, extends from the outer layer and extends to above the outer layer; an outlet pipe is installed on the top pipe and extends out of the inner cylinder; a second valve is installed at the top of the top pipe.

[0035] As a preferred mode of the present application, a leaf plate is fixedly connected to the top of the arc-shaped plate and is in contact with the inner surface of the inner cylinder.

[0036] As a preferred mode of the present application, a screw flight is fixedly connected to the middle of the drive shaft.

[0037] A guide cylinder is arranged outside the screw flight and is fixedly connected with the inner cylinder through a connecting rod.

[0038] As a preferred mode of the present application, a drive plate is fixedly connected to one side of the conduit extending into the annular arc plate.

[0039] A cleaning brush layer is fixedly connected to the drive plate and is in contact with the surface of the annular arc plate.

[0040] The beneficial effects of the present application are as follows:

[0041] 1. The dual-function method and device for reducing salt content of kitchen waste and producing bio-organic fertilizer, through 16S sequencing technology, five salt-tolerant strains, three nitrogen-fixing strains, three potassium-dissolving strains, and two phosphorus-dissolving strains are screened out, based on the core adaptation of salt-tolerant bacteria, the unique compensation of nitrogen-fixing bacteria, and the decomposition of organic acids and inhibition of salting-out effect of kitchen waste by potassium-dissolving / phosphorus-dissolving bacteria, the effective degradation of stubborn organic matter and residual pollutants in waste liquid is realized. The suspended solids, color and odor in the waste liquid are reduced, the transparency and stability of the waste liquid are improved. The growth of pathogenic bacteria and harmful microorganisms is inhibited, and the microbial safety of the waste liquid is improved. Practice has proved that the method for treating waste liquid in kitchen waste by biological method is easy to operate and has high practicality.

[0042] 2.The kitchen waste salt reduction and bio-organic fertilizer production dual-function method and device, the process used in the application can effectively convert the kitchen waste leachate into bio-organic fertilizer and realize salt recovery. This innovative technology provides a new way for the high-value utilization of household waste, helps to reduce environmental pollution, improve resource utilization, and promote sustainable economic development. In addition, the strains used in the application can be value-added cultured at room temperature, thereby reducing energy consumption in industrial applications, and have practical application value.

[0043] 3.The kitchen waste salt reduction and bio-organic fertilizer production dual-function method and device, by extracting the waste liquid from the bottom of the barrier layer and passing the waste liquid through hot water, and then introducing the waste liquid into the inner cylinder again, the waste liquid in the inner cylinder can circulate and flow, and can be heated by the hot water in the outer barrier layer, thereby improving the heating effect of the hot water on the waste liquid, accelerating the waste liquid to reach the required reaction temperature, and thereby accelerating the reaction rate of the waste liquid.

[0044] 4.The kitchen waste salt reduction and bio-organic fertilizer production dual-function method and device, the bacteria in the waste liquid in the annular arc plate are filtered in the annular arc plate, avoiding some bacteria in the waste liquid in a floating state, which cannot be removed, thereby affecting the subsequent work of the waste liquid. In the process of filtering the waste liquid, the conduit and the arc plate are slowly rotated by the driving shaft, and the rotating arc plate rotates along the top surface of the barrier layer, thereby scraping the bacteria remaining on the upper surface of the barrier layer. Subsequently, the bacteria are first passed through the flow channel and then flow into the annular arc plate through the conduit. In this process, the removal effect of the bacteria can be further improved, and the content of the bacteria in the waste liquid can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0045] The application will be further described below with reference to the accompanying drawings.

[0046] Figure 1 is the overall process flow chart of the kitchen waste salt reduction and bio-organic fertilizer production of the application;

[0047] Figure 2 is the overall view of the first fermentation tank after installation in the application;

[0048] Figure 3 is the perspective view of the first fermentation tank in the application;

[0049] Figure 4 is the internal structure view of the first fermentation tank in the application;

[0050] Figure 5 is the top view of the first fermentation tank in the application;

[0051] Figure 6 is the kitchen waste salt reduction and bio-organic fertilizer production dual-function method and deviceFigure 5 Sectional view at point AA;

[0052] Figure 7 This is the present invention. Figure 6 Enlarged view of section B in the middle.

[0053] In the diagram: 1. Inner cylinder; 11. Barrier layer; 12. Conduit; 13. Arc plate; 14. Flow channel; 15. Notch; 16. Fixed pipe; 17. Blade; 18. Screwdriver blade; 19. Guide tube; 2. Outer partition; 21. Suction pump; 22. Bottom pipe; 23. Pulling pipe; 24. Top pipe; 25. Outlet pipe; 3. Arc chamber; 31. Liquid outlet pipe; 32. Annular arc plate; 33. Leakage trough; 34. Filter screen; 35. Cleaning brush layer. Detailed Implementation

[0054] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0055] As mentioned in the background section, traditional methods for treating kitchen waste mainly include landfill, incineration, and composting. While these methods can reduce waste volume to some extent, they also have drawbacks such as environmental pollution, resource waste, and high energy consumption. Furthermore, household kitchen waste often contains a large amount of water, and the direct discharge of its liquid waste without treatment may cause secondary pollution to water bodies.

[0056] Therefore, improving the efficiency of food waste treatment, reducing environmental pollution, and increasing the recycling rate of resources is one of the technical challenges in existing technologies.

[0057] To address the aforementioned technical problems, this invention proposes a dual-function method for reducing the salinity of kitchen waste and producing bio-organic fertilizer.

[0058] like Figure 1 As shown; as an embodiment of the present invention; the dual-function method for desalinating kitchen waste and producing bio-organic fertilizer includes the following steps:

[0059] S1: Use solid-liquid separation equipment to separate the waste liquid inside the kitchen waste, and collect the obtained waste liquid and solid matter separately for later use;

[0060] S2: the waste liquid is pumped into the first fermentation tank with double-layer structure made of stainless steel by using a magnetic pump, so that the waste liquid is located in the inner layer structure of the first fermentation tank, water is added into the outer layer structure of the first fermentation tank, and the water in the outer layer structure is heated to 90℃ by using a circulating heating system, then the temperature is kept for 1h, so that the waste liquid is sterilized, then the circulating heating system is turned off, and the waste liquid in the first fermentation tank is naturally cooled to 35℃, so as to be ready for subsequent inoculation of salt-tolerant bacteria;

[0061] S3: the salt-tolerant bacteria are inoculated into the first fermentation tank at an inoculation ratio of 2% (v / v), in an environment of 30-40℃, and fully reacted for 5-7 days by using a stirring device at a rotating speed of 200 rpm / min, so that the total bacterial content is about 3×10 8 CFU / mL, then the waste liquid in the first fermentation tank is sampled, the pH of the waste liquid is increased from the initial pH 7 to pH 7.5, and the color of the waste liquid is changed from the initial clear orange red to the relatively turbid light yellow, then the waste liquid in the first fermentation tank is left to stand for 1-2 days, so that the bacteria in the waste liquid are naturally settled, the settled bacteria in the first fermentation tank are discharged by using a flow-out device, and are stored as salt-tolerant bacterial fertilizer;

[0062] S4: when the bacteria in the first fermentation tank are removed, the water in the outer layer structure of the first fermentation tank is heated to 90℃ by using a circulating heating system, and the temperature is kept for 1h, so as to achieve secondary sterilization; then the circulating heating system is turned off, the waste liquid in the first fermentation tank is naturally cooled to 35℃, then the waste liquid cooled to 35℃ is pumped into the second fermentation tank with double-layer structure made of organic glass by using a magnetic pump, so that the waste liquid is located in the inner layer structure of the second fermentation tank; then the growth-promoting bacteria are inoculated into the second fermentation tank at a ratio of 2% (v / v) of the waste liquid, in an environment of 30-40℃, and fully reacted for 5-7 days by using a stirring device at a rotating speed of 200 rpm / min, so that the total bacterial content is about 1×10 9 CFU / mL, the pH of the waste liquid is 7.5, then the waste liquid in the second fermentation tank is left to stand for 1-2 days, so that the bacteria in the waste liquid are naturally settled, the settled bacteria in the second fermentation tank are discharged by using a flow-out device, and are stored as biological bacterial fertilizer;

[0063] In the reaction process, fermentation is carried out in the first fermentation tank and the second fermentation tank respectively, and the solid precipitate obtained after each fermentation is discharged by using a flow-out device at the bottom of the fermentation tank, which is the microbial compost obtained in the present application;

[0064] S5: Pumping the waste liquid in the second fermenter into the decolorizing tank by using a magnetic pump, adding 10% (w / v) activated carbon powder, 3-5% (w / v) alum and flocculants to the waste liquid, and fully stirring the decolorizing tank by using a stirring device for 12 hours, and then obtaining clear supernatant by allowing the waste liquid in the decolorizing tank to naturally settle, and then removing the precipitate in the decolorizing tank by using an outflow device;

[0065] S6: Pumping the supernatant into a PP membrane device by using a stainless steel pump, removing suspended particles and part of the colloid in the supernatant by using the PP membrane device, and then pumping the supernatant that has passed through the PP membrane device into an ultrafiltration device, a nanofiltration device and a reverse osmosis device in sequence by using a diaphragm pump for further treatment, and making the supernatant reach the discharge standard and recovering concentrated salt liquid;

[0066] Among them, the ultrafiltration membrane retains substances with a molecular weight of 1000-100000 Da, removes macromolecular organic matter, bacteria and part of the pigment, and provides protection for subsequent nanofiltration / reverse osmosis. The nanofiltration membrane selectively separates divalent and above ions (such as SO 2- 、Ca 2+ , etc.); the reverse osmosis membrane is used as the final desalination step, retains more than 90% of the dissolved salt, and produces concentrated brine and wastewater that meets the standard.

[0067] Among them, the initial salinity of the kitchen waste liquid is 1.38%, which is reduced to 1.08% after one fermentation, which is 21.7% lower than the original waste liquid; the salinity is reduced to 0.82% after two fermentations, which is 24% lower than the waste liquid after one fermentation; after the reverse osmosis device, the salinity is reduced to 0.11%, which is 92.0% lower than the initial salinity.

[0068] As an embodiment of the present application; the strains are screened by using a selective medium when obtained, and the microbial species are determined by using 16S sequencing technology; the five salt-tolerant bacteria are Nocardiopsis dassonvillei dassonvillei, Microbacterium qingdaoense, Bacillus amyloliquefaciens, Pristina aerobia, and Marinilabilius;

[0069] The three nitrogen-fixing bacteria are Prototheca thailandica, Pseudomonas borealis, and Citrus prototheca; the three potassium-dissolving bacteria are Bacillus velezensis, Bacillus siamensis, and Bacillus karibibensis; and the two phosphorus-dissolving bacteria are Prototheca qingdaoensis and Olivibacter oleivorans.

[0070] Before use, each strain is mixed in a volume ratio of 1:1, and the mixed bacterial liquid is inoculated at 10-20% (v / v).

[0071] The five salt-tolerant strains provided by the application can preliminarily treat kitchen waste liquid, wherein the Halobacterium has strong salt tolerance, can survive in a high-salt environment and degrade organic matter; the Nocardiopsis dassonvillei subsp. dassonvillei has strong ability to decompose complex organic matter such as fat and protein; the Pseudomonas limi can secrete various enzymes such as protease and amylase, and can further decompose protein and carbohydrate in the kitchen waste; the Bacillus amyloliquefaciens can efficiently degrade cellulose and can decompose vegetable residues and other substances in the kitchen waste; and the Microbacterium qingdaoense shows low-temperature tolerance and strong adaptability and can degrade organic matter in a wide temperature range. Through the mixed use of the five strains, various organic components (protein, fat, carbohydrate, cellulose and the like) in the kitchen waste can be more comprehensively degraded, so that the inhibition of high salt and high fat on ordinary bacterial flora is relieved, and other functional bacteria are prevented from being inactivated due to salt stress.

[0072] The other batch of potassium-degrading bacteria, phosphorus-degrading bacteria and nitrogen-fixing bacteria provided by the application totals 8 kinds, which can secondarily treat the preliminarily treated waste liquid, wherein the original Micromonospora thailandica, the original Micromonospora citri and the original Micromonospora qingdaoensis have strong ability to decompose complex organic matter, especially the difficult-to-degrade polysaccharide, lignin and humus and the like. The recalcitrant organic matter in the waste liquid can be further degraded, the suspended solids and colority in the waste liquid are reduced, and the clarity of the waste liquid is improved. The Pseudomonas punicfungi has high-efficiency organic matter degradation ability of aromatic compounds and lipids and the like. The peculiar smell can be further reduced, and the treatability of the waste liquid can be improved by secreting biological surfactants. The Bacillus beijiangensis, the Bacillus siamensis and the Bacillus cabrialesis have broad-spectrum enzyme activity, can further degrade the protein, fat and carbohydrate residues in the waste liquid, secrete antibacterial substances, inhibit the growth of pathogenic bacteria and improve the microbial safety of the waste liquid. The organic matter in the waste liquid is promoted to be mineralized to generate more stable inorganic matter (such as CO2 and H2O). The Olivibacter oleivorans is a strain capable of degrading oil and lipid matter. The residual oil and grease in the waste liquid can be further efficiently degraded to reduce the oil stains and scum in the waste liquid. In addition, the kitchen waste has high carbon and low nitrogen, and the nitrogen-fixing bacteria (such as the Pseudomonas punicfungi) directly fix atmospheric nitrogen to improve the available nitrogen in the waste liquid, avoid the problem that urea needs to be additionally added due to nitrogen deficiency in traditional composting, and enhance the system stability when the nitrogen-fixing bacteria and the salt-tolerant bacteria are symbiotic.

[0073] As an embodiment of the application, the strains in the salt-tolerant bacterial flora and the growth-promoting bacterial flora are activated by using LB medium;

[0074] The strains in the salt-tolerant bacterial flora and the growth-promoting bacterial flora need to be amplified and cultured in the optimal medium before being cultured;

[0075] In the process production, the actual application should be considered, and the LB medium can be used to replace the optimal medium in the process of obtaining the strains.

[0076] As an embodiment of the present application, the salt-tolerant bacteria and the growth-promoting bacteria are used in the fermentation process of the first and second fermentors, the reaction temperature is 35 DEG C, and the reaction time is 5-7 days.

[0077] The first and second fermentors are provided with air pumps at the top for aeration of the waste liquid in the first and second fermentors, so as to ensure aerobic fermentation of the bacteria in the first and second fermentors.

[0078] As an embodiment of the present application, the rejection rate of the reverse osmosis device is greater than or equal to 90%, and the operating pressure is 1.5-2.5 MPa.

[0079] When the reverse osmosis device is used to recover salt, the operating pressure is 2.0 MPa, the reverse osmosis membrane is a polyamide composite membrane, the salt recovery rate is greater than or equal to 90%, and the concentrated liquid is evaporated and crystallized to obtain sodium chloride.

[0080] In the present application, the 16S sequencing results of the salt-tolerant bacteria are shown in Table 1.

[0081] Table 1

[0082]

[0083] In the present application, the 16S sequencing results of the potassium-dissolving bacteria, phosphorus-dissolving bacteria and nitrogen-fixing bacteria are shown in Table 2.

[0084] Table 2

[0085]

[0086] On the other hand, the present application also provides a dual-function device for reducing salt in kitchen waste and producing bio-organic fertilizer, which is suitable for the dual-function method for reducing salt in kitchen waste and producing bio-organic fertilizer.

[0087] As shown in Figures 2-7 As an embodiment of the present application, the device comprises a first fermentor, the first fermentor comprises an inner cylinder 1, the inner cylinder 1 is provided with a cylinder cover at the top, and an outer separation layer 2 is fixedly installed outside the inner cylinder 1.

[0088] The inner cylinder 1 is provided with an outflow device at the bottom, the outflow device is provided with a barrier layer 11 at the top, and the barrier layer 11 is fixedly installed in the inner cylinder 1, and the top of the barrier layer 11 is an arc surface.

[0089] The outflow device comprises an arc-shaped bin 3, and the bottom of the arc-shaped bin 3 is a plane, the arc-shaped bin 3 is provided with a liquid outlet pipe 31 at the bottom, and the liquid outlet pipe 31 is provided with a first valve.

[0090] The arc-shaped bin 3 is fixedly connected with an annular arc plate 32, and a gap is left between the annular arc plate 32 and the arc-shaped bin 3; the surface of the annular arc plate 32 is provided with a leakage groove 33, and the leakage groove 33 is provided with a filter screen 34;

[0091] The barrier layer 11 is rotatably provided with a guide pipe 12 in the middle part; the top of the guide pipe 12 is fixedly connected with a driving shaft, and the driving shaft extends above the cylinder cover and is connected with a motor;

[0092] The outer ring of the guide pipe 12 is fixedly connected with an arc-shaped plate 13, and the arc-shaped plate 13 is provided with a flow channel 14; the outer ring surface of the guide pipe 12 is provided with uniformly arranged missing grooves 15, and the missing grooves 15 are communicated with the flow channel 14;

[0093] The lower part of the guide pipe 12 is provided with a fixed pipe 16, and the fixed pipe 16 is fixedly connected in the arc-shaped bin 3 through an L-shaped plate; the guide pipe 12 is rotatable in the fixed pipe 16; the fixed pipe 16 is provided with a first electromagnetic valve;

[0094] The bottom of the outer barrier layer 2 is provided with a plurality of suction pumps 21; the bottom of the suction pump 21 is extended with a bottom pipe 22; the bottom pipe 22 is provided with two suction pipes 23, the upper suction pipe 23 extends above the filter screen 34 through the annular arc plate 32, and the bottom suction pipe 23 extends between the annular arc plates 32 and is aligned with the filter screen 34; the two suction pipes 23 are provided with second electromagnetic valves;

[0095] The top of the suction pump 21 is provided with a top pipe 24, and the top pipe 24 extends from the outer barrier layer 2 and extends above the outer barrier layer 2; the top pipe 24 is provided with an outlet pipe 25, and the outlet pipe 25 extends into the inner cylinder 1; the top of the top pipe 24 is provided with a second valve;

[0096] When the waste liquid is treated, the waste liquid is pumped into the inner cylinder 1 of the first fermentation tank, and the waste liquid is accumulated above the barrier layer 11, then water is introduced into the outer barrier layer 2, and the water in the outer barrier layer 2 is heated by the circulating heating system, when the water in the outer barrier layer 2 is heated to ninety degrees, the temperature is maintained for one hour, so that the waste liquid in the inner cylinder 1 is heated, and the sterilization purpose is achieved, then the waste liquid in the inner cylinder 1 is naturally cooled to thirty-five degrees, then the salt-tolerant bacteria are introduced into the inner cylinder 1, then the bacteria are reacted in the waste liquid at thirty-five degrees;

[0097] Specifically, in the process of heating the waste liquid in the inner cylinder 1 by the hot water in the outer partition layer 2, the waste liquid close to the outer partition layer 2 will be heated first, and the waste liquid far from the outer partition layer 2 will be heated later, resulting in inconsistent heating speed of the waste liquid, thereby reducing the reaction speed of the waste liquid; therefore, in the process of heating the waste liquid in the inner cylinder 1 by the hot water in the outer partition layer 2, the motor is controlled to drive the rotation of the drive shaft, and the rotating drive shaft will drive the conduit 12 to rotate, since the conduit 12 rotates in the fixed pipe 16, it will rotate along the fixed pipe 16, and the rotating conduit 12 will drive the plurality of arc-shaped plates 13 to rotate, the rotating arc-shaped plates 13 can agitate the waste liquid in the inner cylinder 1, so that the waste liquid flows in the inner cylinder 1 and exchanges heat with the hot water in the outer partition layer 2;

[0098] More specifically, the first electromagnetic valve in the fixed pipe 16 is controlled to open, and the waste liquid above the blocking layer 11 will flow in the flow channel 14 in the arc-shaped plate 13, then flow into the conduit 12 through the slot 15 opened on the conduit 12, and finally flow out from the bottom of the fixed pipe 16, the flowing waste liquid will gradually fill the annular arc plate 32, and part of the waste liquid will flow into the space between the arc-shaped bin 3 and the annular arc plate 32 through the filter screen 34 in the leakage groove 33, then the suction pump 21 is controlled to work, and the second electromagnetic valve extending into the suction pipe 23 inside the annular arc plate 32 is controlled to open, so that the waste liquid in the annular arc plate 32 can be pumped out, the pumped-out waste liquid will first pass through the bottom pipe 22, then enter the top pipe 24 after passing through the suction pump 21, since the top pipe 24 passes through the inside of the outer partition layer 2, when the waste liquid flows through, the hot water can heat the passing waste liquid, when the waste liquid flows to the top of the top pipe 24, it will flow into the inner cylinder 1 again through the outlet pipe 25; by pumping the waste liquid from the bottom of the blocking layer 11, making the waste liquid pass through the hot water, and finally entering the inner cylinder 1 again, the waste liquid in the inner cylinder 1 can circulate and flow through the hot water in the outer partition layer 2, thereby improving the heating effect of the hot water on the waste liquid, accelerating the waste liquid to reach the required reaction temperature, and thereby accelerating the reaction rate of the waste liquid; when the waste liquid is in a constant temperature state, the suction pump 21 and the second electromagnetic valve are controlled to be closed;

[0099] Further, when the waste liquid reaction is completed, the bacteria in the waste liquid will naturally settle, at this time, the first control valve is controlled to be opened, the liquid in the inner cylinder 1 will flow from the flow channel 14 of the arc plate 13 into the missing groove 15, and then flow into the annular arc plate 32 through the guide pipe 12 and the fixed pipe 16. In the process of waste liquid flowing, the settled bacteria will be carried to the annular arc plate 32, and the waste liquid flowing into the annular arc plate 32 will flow to the arc-shaped bin 3 and the annular arc plate 32 through the filter screen 34, so that the bacteria will be filtered into the annular arc plate 32, and then the suction pump 21 is controlled to work, and the electromagnetic valve in the suction pipe 23 between the arc-shaped bin 3 and the annular arc plate 32 is controlled to be opened, so that the waste liquid flowing between the annular arc plate 32 and the arc-shaped bin 3 is sucked out and then introduced into the inner cylinder 1 again through the top pipe 24 and the outlet pipe 25. In this way, the bacteria in the waste liquid in the annular arc plate 32 are filtered in the annular arc plate 32, so that some bacteria in the waste liquid in a floating state cannot be removed, thereby affecting the subsequent work of the waste liquid. In the process of filtering the waste liquid, the guide pipe 12 and the arc plate 13 are slowly rotated by the driving shaft, the rotating arc plate 13 can rotate along the top surface of the barrier layer 11, so that the bacteria remaining on the top surface of the barrier layer 11 can be scraped off, and then the bacteria are first subjected to the flow channel 14 and then flow into the annular arc plate 32 through the guide pipe 12. In this process, the removal effect of the bacteria can be further improved, and the content of the bacteria in the waste liquid can be reduced.

[0100] When the waste liquid in the inner cylinder 1 is circulated, the bacteria in the waste liquid are filtered into the annular arc plate 32, then the first electromagnetic valve in the fixed pipe 16 is controlled to be closed, and the second electromagnetic valve in the suction pump 21 and the suction pipe 23 is controlled to be closed. At this time, part of the waste liquid is still left in the annular arc plate 32 and the annular bin, then the first valve on the liquid outlet pipe 31 is opened, the bacteria and the waste liquid in the annular arc plate 32 flow out through the liquid outlet pipe 31 and can be collected. In the subsequent fertilizer production, since the collected bacteria contain waste liquid, water does not need to be added in the subsequent fertilizer production process. Then the waste liquid is introduced into the second fermentation tank for further reaction.

[0101] As an embodiment of the present application, the top of the arc plate 13 is fixedly connected with a leaf plate 17, and the leaf plate 17 is in contact with the inner surface of the inner cylinder 1;

[0102] The middle of the driving shaft is fixedly connected with an auger piece 18;

[0103] The outer side of the auger piece 18 is provided with a guide cylinder 19, and the guide cylinder 19 is fixedly connected in the inner cylinder 1 through a connecting rod;

[0104] One side of the guide pipe 12 extending into the annular arc plate 32 is fixedly connected with a driving plate;

[0105] The driving plate is fixedly connected with a cleaning brush layer 35, and the cleaning brush layer 35 is in surface contact with the annular arc plate 32;

[0106] Since the arc-shaped plate 13 is fixedly connected with the blade plate 17, the blade plate 17 is driven to rotate in the process of rotation of the arc-shaped plate 13, and the rotating blade plate 17 can increase the stirring amplitude, thereby improving the stirring effect on the waste liquid, and the blade plate 17 can scrape off the bacteria adhered to the surface of the inner cylinder 1, so that part of the bacteria adhered to the inner cylinder 1 can be discharged.

[0107] Specifically, in the process of reaction, the waste liquid is driven by the driving shaft to rotate the auger plate 18 in the guide cylinder 19, the rotating auger plate 18 drives the waste liquid below the inner cylinder 1 to flow upwards, and when the waste liquid flows to the top of the guide cylinder 19, it flows out, so that the waste liquid can be stirred, and the waste liquid in the middle part of the inner cylinder 1 can flow to both sides and be close to the hot water in the inner partition layer 2, and the waste liquid can be mixed with each other, thereby reducing the temperature difference of the waste liquid at different positions, making the reaction rate of the waste liquid at different positions relatively consistent, and controlling the circulation of the waste liquid through the outer partition layer 2, thereby further improving the heat reduction effect of the waste liquid.

[0108] More specifically, in the process of rotation of the guide pipe 12, the cleaning brush layer 35 is driven to rotate by the driving plate, and the rotating cleaning brush layer 35 can clean the filter screen 34, thereby avoiding blockage of the filter screen 34 and preventing the waste liquid from passing through.

[0109] Further, when the arc-shaped bin 3 and the annular arc plate 32 need to be cleaned, the top pipe 24 is communicated with the external guide pipe, and the external water source is introduced into the top pipe 24, and then the suction pump 21 is controlled to reverse, so that water is introduced into the two suction pipes 23 and sprayed out through the suction pipes 23. The water sprayed out of the lower suction pipe 23 can pass through the filter screen 34, so that the filter screen 34 can be cleaned, thereby removing the bacteria remaining on the filter screen 34, and the rotating cleaning brush layer 35 can further improve the cleaning effect of the filter screen 34. Then, the first valve on the liquid outlet pipe 31 is opened, and the bacteria and water are discharged from the liquid outlet pipe 31, and then the bacteria and water are collected.

[0110] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A dual-function device for desalinating kitchen waste and producing bio-organic fertilizer; characterized in that: Including the first fermentation tank; The first fermenter includes an inner cylinder (1); a cylinder cover is installed on the top of the inner cylinder (1); and an outer partition (2) is fixedly installed on the outside of the inner cylinder (1). An outflow device is installed at the bottom of the inner cylinder (1); a barrier layer (11) is provided at the top of the outflow device, and the barrier layer (11) is fixedly installed inside the inner cylinder (1); the top of the barrier layer (11) is an arc surface; The outflow device includes an arc-shaped chamber (3), and the bottom of the arc-shaped chamber (3) is flat; an outlet pipe (31) is installed at the bottom of the arc-shaped chamber (3), and a first valve is installed inside the outlet pipe (31); An annular arc plate (32) is fixedly connected inside the arc-shaped chamber (3), and there is a gap between the annular arc plate (32) and the arc-shaped chamber (3); a groove (33) is opened on the surface of the annular arc plate (32), and a filter screen (34) is installed in each groove (33); A conduit (12) is rotatably installed in the middle of the barrier layer (11); a drive shaft is fixedly connected to the top of the conduit (12), and the drive shaft extends to the top of the cylinder cover and is connected to the motor; The outer ring of the conduit (12) is fixedly connected to the arc plate (13), and the arc plate (13) has a flow channel (14) inside; the outer ring surface of the conduit (12) has uniformly arranged notches (15), and the notches (15) are connected to the flow channel (14); A fixed tube (16) is provided below the conduit (12), and the fixed tube (16) is fixedly connected to the arc-shaped chamber (3) by an L-shaped plate; the conduit (12) rotates inside the fixed tube (16); a first solenoid valve is installed inside the fixed tube (16); Multiple suction pumps (21) are installed at the bottom of the outer partition (2); a bottom pipe (22) extends from the bottom of the suction pump (21); two suction pipes (23) are installed on the bottom pipe (22), the upper suction pipe (23) extends through the annular arc plate (32) to the top of the filter screen (34), and the bottom suction pipe (23) extends between the annular arc plates (32) and is aligned with the filter screen (34); a second solenoid valve is installed in both suction pipes (23); A jacking pipe (24) is installed on the top of the suction pump (21), and the jacking pipe (24) passes through the outer partition (2) and extends above the outer partition (2); an outlet pipe (25) is installed on the jacking pipe (24), and the outlet pipe (25) extends out of the inner cylinder (1); a second valve is installed on the top of the jacking pipe (24).

2. The dual-function equipment for desalination of kitchen waste and production of bio-organic fertilizer according to claim 1, characterized in that: A blade (17) is fixedly connected to the top of the arc plate (13), and the blade (17) is in contact with the inner surface of the inner cylinder (1).

3. The dual-function equipment for desalination of kitchen waste and production of bio-organic fertilizer according to claim 2, characterized in that: A screw conveyor plate (18) is fixedly connected to the middle of the drive shaft; A guide tube (19) is provided on the outside of the auger plate (18), and the guide tube (19) is fixedly connected to the inner cylinder (1) by a connecting rod.

4. The dual-function equipment for desalination of kitchen waste and production of bio-organic fertilizer according to claim 3, characterized in that: A drive plate is fixedly connected to one side of the conduit (12) extending into the annular arc plate (32); A cleaning brush layer (35) is fixedly connected to the drive plate, and the cleaning brush layer (35) is in contact with the surface of the annular arc plate (32).

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