Urban animal waste treatment equipment and urban animal waste cooperative treatment system

Abstract

The utility model is suitable for the technical field of biological treatment.The urban animal waste treatment equipment comprises a cooking reaction kettle, a first filtering device, an acidification tank and an anaerobic reactor, the first filtering device is connected with a discharging port of the cooking reaction kettle, and the acidification tank is connected with a discharging port of the cooking reaction kettle; the acidification tank is communicated with a first slurry outlet of the first filtering device, the anaerobic reactor is communicated with a discharging port of the acidification tank, materials obtained after animal waste is subjected to high-temperature cooking are separated into grease, meat and bone residues and slurry containing organic matter through the first filtering device, and solid organic matter enters the acidification tank to be decomposed into macromolecular organic matter; and the macromolecular organic matters enter the anaerobic reactor and are further decomposed into micromolecular products. And the feed liquid output from the anaerobic reactor does not contain solid organic matters, so that the sewage treatment pressure can be subsequently reduced, the sewage treatment efficiency can be improved, the overall treatment pressure of urban animal wastes can be relieved, and the urban environment can be improved.

Description

Technical Field

[0001] The present application relates to the field of biological treatment technology, and in particular to an urban animal waste treatment system and an urban animal waste collaborative treatment system. Background Art

[0002] Daily urban life generates a large amount of animal waste, such as animal product scraps from slaughterhouses and expired animal meat products. This animal waste contains a large amount of organic matter. Currently, cities typically treat this animal waste by extracting the fat and collecting the large meat and bone residues, which are then transported to a designated location. The slurry waste containing large amounts of solid organic matter generated during this process is typically transported to a sewage treatment plant for treatment.

[0003] However, these slurry waste streams contain large amounts of solid organic matter, which sewage treatment plants lack the capacity to process. Microbial processing of these organic matter is slow and inadequate, placing significant pressure on sewage treatment. This, in turn, impacts the treatment of animal waste, leaving municipal organic waste treatment inefficient and facing significant long-term pressure. Furthermore, the decomposition products of organic matter during sewage treatment are completely unusable, resulting in a significant waste of resources. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide an urban animal waste treatment system, aiming to solve the technical problems of low organic matter treatment efficiency and high treatment pressure caused by the existing urban animal waste treatment process.

[0005] The embodiment of the present application is implemented as follows: an urban animal waste treatment system, comprising:

[0006] Cooking reactor, used for cooking animal materials;

[0007] a first filtering device connected to the discharge port of the cooking reactor and having a fat outlet, a first slurry outlet, and a meat and bone residue outlet;

[0008] an acidification tank, wherein the feed port of the acidification tank is connected to the first slurry outlet; and

[0009] The anaerobic reactor is connected to the discharge port of the acidification tank.

[0010] In one embodiment, a first slurry container is further included, wherein the discharge port of the first slurry container and the discharge port of the acidification tank are connected to the feed port of the anaerobic reactor in parallel; the first slurry container is used to store kitchen waste filtrate.

[0011] In one embodiment, the exhaust port of the cooking reactor is connected to the feed port of the first slurry container.

[0012] In one embodiment, the exhaust port of the cooking reactor is connected to the air inlet of the anaerobic reactor.

[0013] In one embodiment, a gas collecting device is further included, wherein the gas inlet of the gas collecting device is connected to the exhaust port of the anaerobic reactor.

[0014] In one embodiment, a second filtering device is further included, which is connected to the discharge port of the cooking reactor and has a first solid residue outlet and a second slurry outlet; the second slurry outlet is connected to the feed port of the first filtering device.

[0015] In one embodiment, a second slurry container and a first filter press are further included, the first solid residue outlet is connected to the feed port of the first filter press, the first filter press has a second solid residue outlet and a third slurry outlet, the third slurry outlet and the second slurry outlet are connected in parallel to the feed port of the second slurry container; the discharge port of the second slurry container is connected to the feed port of the first filter device.

[0016] Another object of the present invention is to provide a system for the coordinated treatment of urban animal waste, comprising:

[0017] Cooking reactor, used for cooking animal materials;

[0018] a first filtering device connected to the discharge port of the cooking reactor and having a fat outlet, a first slurry outlet, and a meat and bone residue outlet;

[0019] an acidification tank, wherein the feed port of the acidification tank is connected to the first slurry outlet, and

[0020] The kitchen waste treatment equipment includes an anaerobic reactor, and the anaerobic reactor is connected to the discharge port of the acidification tank.

[0021] In one embodiment, the food waste treatment equipment further includes a first slurry container, the discharge port of the first slurry container and the discharge port of the acidification tank are connected to the feed port of the anaerobic reactor in parallel; the first slurry container is used to store food waste filtrate.

[0022] In one embodiment, the food waste treatment equipment further includes a gas collection device, and the air inlet of the gas collection device is connected to the exhaust port of the anaerobic reactor.

[0023] The urban animal waste treatment equipment and urban animal waste collaborative treatment system provided in the embodiments of the present application have the following beneficial effects:

[0024] The present invention provides an urban animal waste treatment system, which includes a cooking reactor, a first filter, an acidification tank, and an anaerobic reactor. The first filter is connected to the discharge port of the cooking reactor and has a fat outlet, a first slurry outlet, and a meat and bone residue outlet. The acidification tank is connected to the first slurry outlet, and the anaerobic reactor is connected to the discharge port of the acidification tank. Thus, after high-temperature cooking of the animal waste in the cooking reactor, the first filter is separated into fat, meat and bone residue, and a slurry containing organic matter by the first filter. The slurry contains a large amount of solid organic matter. The solid organic matter enters the acidification tank and is decomposed into large organic molecules. The large organic molecules enter the anaerobic reactor and are further decomposed into small molecular products. Thus, the liquid output from the anaerobic reactor does not contain solid organic matter and subsequently enters the sewage treatment plant, which can reduce sewage treatment pressure, improve sewage treatment efficiency, and alleviate the overall treatment pressure of urban animal waste, which is beneficial to improving the urban environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 Schematic diagram of the structure of the urban animal waste treatment system provided in an embodiment of the present application;

[0027] Figure 2 It is a structural diagram of the urban animal waste collaborative treatment system provided in an embodiment of the present application.

[0028] The meanings of the marks in the figure are:

[0029] 100- Urban animal waste treatment equipment;

[0030] 11- Crusher;

[0031] 12-Conveyor;

[0032] 13-cooking reactor, 131-second filtering device;

[0033] 14-first filter press;

[0034] 15-first slurry container;

[0035] 16-first filtering device;

[0036] 17-Oil storage tank;

[0037] 18-first buffer tank;

[0038] 19-Acidification tank;

[0039] 20- second slurry container;

[0040] 21- anaerobic reactor;

[0041] 22-second buffer tank;

[0042] 23- Second filter press;

[0043] 24-third buffer tank;

[0044] 25-Gas collection device;

[0045] 200-Urban animal waste collaborative processing system;

[0046] 30-Food waste treatment equipment. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0048] It should be noted that when a component is referred to as being "fixed on" or "set on" another component, it may be fixed or set on the other component directly or indirectly. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The terms "upper", "lower", "left", "right", 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 description and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this patent. The terms "first" and "second" are only used for the convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0049] In order to illustrate the technical solution described in this application, the following is a detailed description with reference to specific drawings and embodiments.

[0050] See also Figure 1 As shown, an embodiment of the present application provides an urban animal waste treatment device 100 for treating animal waste generated in urban life.

[0051] Specifically, see Figure 1As shown, the urban animal waste treatment equipment 100 includes a cooking reactor 13, a first filter device 16, an acidification tank 19 and an anaerobic reactor 21; wherein the cooking reactor 13 is used to cook animal waste, referred to herein as animal material; the first filter device 16 is connected to the discharge port of the cooking reactor 13 and has a fat outlet, a first slurry outlet and a meat and bone residue outlet; the feed port of the acidification tank 19 is connected to the first slurry outlet of the first filter device 16; and the feed port of the anaerobic reactor 21 is connected to the discharge port of the acidification tank 19.

[0052] The animal material is cooked at high temperature in the cooking reactor 13, producing a mixture of water, fat, meat pulp, and bone residue. This mixture enters the first filtration device 16 for filtration and separation. The fat is discharged from the fat outlet and can be stored, for example, in the oil storage tank 17 for further processing. The large-sized meat and bone residue is discharged from the meat and bone residue outlet for further processing. The water and small-sized meat pulp, as filtrate, enter the acidification tank 19 from the first pulp outlet.

[0053] In the acidification tank 19, acidic substances such as hydrochloric acid and sulfuric acid break down the solid organic matter in the filtrate into macromolecular organic matter (such as proteins, polysaccharides, fats, etc.). In the anaerobic reactor 21, anaerobic bacteria further break down these macromolecular organic matter into small molecular organic matter (such as organic acids, alcohols, amino acids, etc.).

[0054] As a result, the filtrate ultimately discharged from the discharge port of the anaerobic reactor 21 does not contain solid organic matter and macromolecular organic matter, and small molecular organic matter is more easily decomposed during subsequent treatment. For example, when the filtrate discharged from the discharge port of the anaerobic reactor 21 enters a sewage treatment plant, it can reduce sewage treatment pressure, improve sewage treatment efficiency, and alleviate the overall treatment pressure of urban animal waste, thereby improving the urban environment.

[0055] See also Figure 1 As shown, in one embodiment, the urban animal waste treatment equipment 100 further includes a gas collection device 25 , and the gas inlet of the gas collection device 25 is connected to the exhaust port of the anaerobic reactor 21 .

[0056] In the anaerobic reactor 21, acid-producing bacteria further convert the above-mentioned small molecule organic matter into volatile fatty acids (such as acetic acid, propionic acid, butyric acid, etc.) and carbon dioxide, hydrogen, etc. Taking glucose as an example, it can be converted into acetic acid and hydrogen under the action of acid-producing bacteria. Then, methanogenic bacteria use the volatile fatty acids and hydrogen produced in the acid production stage to generate methane and carbon dioxide. Methane is an important energy gas that can be collected and utilized. Therefore, in an embodiment of the present application, the methane generated in the anaerobic reactor 21 is collected by a gas collection device 25, and the energy of the methane can be further utilized subsequently. For example, methane is used to generate electricity, etc. This improves the utilization rate of animal materials, reduces resource waste, and realizes energy recycling.

[0057] See also Figure 1 As shown, in one embodiment, the exhaust port of the cooking reactor 13 in the urban animal waste treatment facility 100 is connected to the air inlet of the anaerobic reactor 21. This arrangement allows the large amount of small organic molecules contained in the exhaust gas generated during the high-temperature cooking process to enter the anaerobic reactor 21 and be decomposed by anaerobic bacteria and acid-producing bacteria. This further improves the utilization rate of animal waste, reduces exhaust emissions, and avoids environmental pollution.

[0058] See also Figure 1 As shown, in one embodiment, the urban animal waste treatment facility 100 further includes a first slurry container 15, the discharge port of the first slurry container 15 being connected in parallel with the discharge port of the acidification tank 19 to the feed port of the anaerobic reactor 21. Here, the first slurry container 15 is a storage container for storing food waste filtrate.

[0059] In anaerobic reactions, carbon is an important source of energy for microorganisms. Many anaerobic microorganisms rely on external organic carbon sources for energy. Carbon is also the basic raw material for microorganisms to synthesize their own cellular substances. Microorganisms use carbon to build the basic structure of cells, such as cell walls, cell membranes, and various organic compounds in the cytoplasm. In addition, at different stages of anaerobic reactions, carbon participates in the production of a variety of key metabolites. During the acid production stage, carbon is gradually converted from the initial complex organic matter (such as carbohydrates, fats, and proteins) into volatile fatty acids such as acetic acid, propionic acid, and butyric acid. Taking starch as an example, during the hydrolysis and acid production process, starch is first hydrolyzed into glucose, which is then decomposed into pyruvic acid, and pyruvic acid is further converted into various volatile fatty acids.

[0060] During the anaerobic reaction process, the appropriate carbon-nitrogen ratio has a crucial influence on the reaction rate, reaction efficiency, etc.

[0061] Specifically, in anaerobic reactions, first, the carbon-nitrogen ratio (C / N) is crucial for the growth and metabolic activities of microorganisms. Microorganisms need carbon sources as energy and raw materials for building cell substances, and they also need nitrogen sources to synthesize cell components such as proteins and nucleic acids. A suitable carbon-nitrogen ratio can provide balanced nutrition for microorganisms and promote their growth and reproduction. Second, a suitable carbon-nitrogen ratio can maintain the optimal reaction rate of anaerobic reactions. Third, the carbon-nitrogen ratio is closely related to the buffer system and pH stability in the anaerobic reaction system. Fourth, a suitable carbon-nitrogen ratio can improve the utilization efficiency of substrates (organic matter). When the carbon-nitrogen ratio meets the nutritional requirements of microorganisms, microorganisms can make full use of organic matter for growth and metabolism, converting more organic matter into useful products (such as methane) or decomposing it into harmless substances (such as carbon dioxide and water).

[0062] The kitchen waste filtrate contains a high amount of carbon, serving as a carbon source for the anaerobic reaction. The filtrate discharged from the outlet of the acidification tank 19 also contains a high amount of nitrogen, serving as a nitrogen source for the anaerobic reaction. Thus, the urban animal waste treatment equipment 100 provided in this embodiment, by combining it with the kitchen waste filtrate, can improve the efficiency of the anaerobic reaction while reducing equipment footprint and costs.

[0063] In one embodiment, the exhaust port of the cooking reactor 13 is connected to the feed port of the first slurry container 15. That is, the large amount of waste gas generated during the high-temperature cooking process first enters the slurry tank, and the small molecular organic matter in the waste gas mixes with the kitchen waste filtrate and enters the anaerobic reactor 21 together with the kitchen waste filtrate. The purpose of this arrangement is to allow the kitchen waste filtrate in the first slurry container 15 to cool and condense the waste gas, preventing the high-temperature gas from directly entering the anaerobic reactor 21 and affecting the anaerobic reaction. This eliminates the need for additional structures such as condensation towers to cool and condense the waste gas, saving costs and floor space.

[0064] Please continue reading Figure 1 As shown, the urban animal waste treatment equipment 100 also includes a second filtering device 131, a second slurry container 20 and a first filter press 14. The second filtering device 131 is connected to the discharge port of the cooking reactor 13, and has a first solid residue outlet and a second slurry outlet; the first solid residue outlet is connected to the feed port of the first filter press 14, and the first filter press 14 has a second solid residue outlet and a third slurry outlet. The third slurry outlet and the second slurry outlet are connected to the feed port of the second slurry container 20 in parallel or in series; the discharge port of the second slurry container 20 is connected to the feed port of the first filtering device 16.

[0065] In this way, the mixture of water, fat, meat slurry, and solid residue obtained in the cooking reactor 13 is first filtered by the second filtering device 131. The large-sized solid residue is output from the first solid residue outlet to the first filter press 14. The mixture of water, fat, and meat slurry is transported from the third slurry outlet to the second slurry container 20 and then enters the first filtering device 16 for further filtration. This achieves graded filtration of the mixture, which is beneficial to improving filtration efficiency.

[0066] In some embodiments, the second filtering device 131 may be integrated with the cooking reactor 13 or be a part of the cooking reactor 13 .

[0067] After the first filter press 14 further filters the large-sized solid residue, part of the slurry may be transported again to the second slurry container 20 through the third slurry outlet.

[0068] The first filter device 16 can be a three-phase centrifuge to separate water, grease and solid matter. Of course, not limited to this, in other optional embodiments, the first filter device 16 can be other forms of separation devices.

[0069] The second filter device 131 may include a filter screen. Of course, not limited thereto, in other optional embodiments, the second filter device 131 may be other forms of separation devices.

[0070] Please continue reading Figure 1 As shown, in this urban animal waste treatment facility 100, a first buffer tank 18 is connected to the discharge port of an anaerobic reactor 21, a second filter press 23 is connected to the discharge port of the first buffer tank 18, and a second buffer tank 22 is connected to the slurry discharge port of the second filter press 23. The solid residue from the second filter press 23 is processed and transported to a designated location, while the filtrate from the second buffer tank 22 is transported to a sewage treatment plant.

[0071] Also, see Figure 1 As shown, the urban animal waste treatment facility 100 further includes a crusher 11 and a conveyor 12. The crusher 11 is used to chop or crush the animal material to reduce the particle size, increase the surface area of ​​the material, improve the effective separation of fat and oil, and increase the slurry conversion rate. The conveyor 12 can be a screw conveyor.

[0072] like Figure 1 As shown, in one embodiment, the urban animal waste treatment equipment 100 further includes a third buffer tank 24 , which is connected between the first slurry outlet of the first filtering device 16 and the acidification tank 19 and is used to temporarily store the filtrate obtained by filtering the first filtering device 16 .

[0073] 2 , this embodiment of the present application further provides an urban animal waste collaborative processing system 200 , which includes:

[0074] A cooking reactor 13 is used for cooking animal materials;

[0075] The first filtering device 16 is connected to the discharge port of the cooking reactor 13 and has a fat outlet, a first slurry outlet and a meat and bone residue outlet;

[0076] an acidification tank 19, wherein the feed port of the acidification tank 19 is connected to the first slurry outlet, and

[0077] The kitchen waste treatment equipment 30 includes an anaerobic reactor 21 , and the anaerobic reactor 21 is connected to the discharge port of the acidification tank 19 .

[0078] In this urban animal waste collaborative treatment system 200, after animal material undergoes acidification treatment in an acidification tank 19, it is combined with an anaerobic reactor 21 in a food waste treatment facility 30 to facilitate the subsequent decomposition of small organic molecules. The filtrate discharged from the anaerobic reactor 21 enters the sewage treatment plant, reducing wastewater treatment pressure, improving treatment efficiency, and alleviating the overall pressure on urban animal waste treatment, thereby improving the urban environment.

[0079] In one embodiment, the food waste treatment equipment 30 further includes a first slurry container 15. The discharge port of the first slurry container 15 is connected in parallel with the discharge port of the acidification tank 19 to the feed port of the anaerobic reactor 21. The first slurry container 15 is used to store food waste filtrate. The filtrate obtained from animal material processing is combined with the food waste filtrate obtained from the food waste treatment equipment 30, and the filtrate is used as a nitrogen source and a carbon source, respectively. Together, the anaerobic reaction proceeds within the anaerobic reactor 21, improving anaerobic reaction efficiency while reducing equipment footprint and costs.

[0080] like Figure 2 As shown, in one embodiment, the food waste treatment equipment 30 further includes a gas collection device 25 , and the air inlet of the gas collection device 25 is connected to the exhaust port of the anaerobic reactor 21 .

[0081] Methane and carbon dioxide are generated in the anaerobic reactor 21. The methane and other gases generated in the anaerobic reactor 21 are collected by the gas collection device 25, and the energy of the methane can be further utilized later.

[0082] In addition, more implementation schemes of the urban animal waste collaborative treatment system 200 can be found in the above-mentioned urban animal waste treatment equipment 100, which will not be repeated here.

[0083] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An urban animal waste treatment facility, characterized in that: include: Cooking reactor, used for cooking animal materials; a first filtering device connected to the discharge port of the cooking reactor and having a fat outlet, a first slurry outlet, and a meat and bone residue outlet; an acidification tank, wherein the feed port of the acidification tank is connected to the first slurry outlet; and The anaerobic reactor is connected to the discharge port of the acidification tank.

2. The urban animal waste treatment facility according to claim 1, wherein: It also includes a first slurry container, the discharge port of the first slurry container and the discharge port of the acidification tank are connected to the feed port of the anaerobic reactor in parallel; the first slurry container is used to store kitchen waste filtrate.

3. The urban animal waste treatment facility according to claim 2, wherein: The exhaust port of the cooking reactor is communicated with the feed port of the first slurry container.

4. The urban animal waste treatment facility according to claim 1, wherein: The exhaust port of the cooking reactor is communicated with the air inlet of the anaerobic reactor.

5. The urban animal waste treatment facility according to claim 1, wherein: A gas collecting device is also included, wherein the gas inlet of the gas collecting device is communicated with the exhaust port of the anaerobic reactor.

6. The urban animal waste treatment facility according to claim 1, wherein: It also includes a second filtering device, which is connected to the discharge port of the cooking reactor and has a first solid residue outlet and a second slurry outlet; the second slurry outlet is connected to the feed port of the first filtering device.

7. The urban animal waste treatment facility according to claim 6, wherein: It also includes a second slurry container and a first filter press, the first solid residue outlet is connected to the feed port of the first filter press, the first filter press has a second solid residue outlet and a third slurry outlet, the third slurry outlet and the second slurry outlet are connected in parallel to the feed port of the second slurry container; the discharge port of the second slurry container is connected to the feed port of the first filter device.

8. A system for the coordinated treatment of urban animal waste, characterized in that: include: Cooking reactor, used for cooking animal materials; a first filtering device connected to the discharge port of the cooking reactor and having a fat outlet, a first slurry outlet, and a meat and bone residue outlet; an acidification tank, wherein the feed port of the acidification tank is connected to the first slurry outlet, and The kitchen waste treatment equipment includes an anaerobic reactor, and the anaerobic reactor is connected to the discharge port of the acidification tank.

9. The urban animal waste collaborative processing system according to claim 8, characterized in that: The kitchen waste treatment equipment further includes a first slurry container, the discharge port of the first slurry container and the discharge port of the acidification tank are connected to the feed port of the anaerobic reactor in parallel; the first slurry container is used to store kitchen waste filtrate.

10. The urban animal waste collaborative processing system according to claim 8, characterized in that: The kitchen waste treatment equipment further comprises a gas collecting device, wherein the gas inlet of the gas collecting device is communicated with the exhaust port of the anaerobic reactor.

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