Animal carcass biological decomposition reagent, method and device

Abstract

The invention discloses an animal carcass biological decomposition reagent, method and device, and the animal carcass biological decomposition method comprises the following steps: S1, immersing an animal carcass in water; s2, adding an animal carcass biological decomposition reagent, and adding alkaline protease and alkaline lipase; s3, raising the temperature to 40-55 DEG C, keeping the temperature for 30-60 minutes, and keeping the water to circularly flow; s4, raising the temperature to 55-95 DEG C, and keeping the temperature until decomposition is completed; the decomposition reagent is prepared from the following components in parts by weight: 0.05 to 0.2 part of alkaline protease, 0.05 to 0.2 part of alkaline lipase, 4.35 to 45 parts of NaOH, 5 to 50 parts of KOH and 0.5 to 5 parts of methyl sodium which are added into every 100 parts of water; the decomposition device comprises a box main body, wherein the box main body is provided with a sample accommodating space, a control device and a water circulation device; the sample containing space is provided with a sample adding opening, a sewage opening, a cover plate, a valve and a heating device, the device is simple, the cost is low, the animal carcass biological decomposition method and equipment are simple, the cost is reduced, the treatment time is greatly shortened, and the environmental pollution is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of animal carcass treatment, specifically to an animal carcass biodegradation reagent, method and device. Background Art

[0002] The harmless treatment processes for animal carcasses mainly include technologies such as incineration, biodegradation, and rendering.

[0003] A complete set of pet incinerators at least consists of four devices: an incinerator with secondary combustion, a condensation tower, an activated carbon adsorption device, and a bag filter. Additionally, a wastewater treatment pond needs to be built, covering an area of at least 20 square meters and weighing nearly 10 tons.

[0004] The existing research on the alkali hydrolysis process for animal carcasses in high-level biosafety laboratories uses a technology for safely treating large experimental animal carcasses at high temperature and high pressure. The temperature range is 120 - 160 °C, and the tank pressure is 34 KPa. In the pretreatment stage, the animal carcasses usually need to be broken into pieces smaller than 5 cm to achieve an ideal decomposition rate. Moreover, the treated waste liquid needs to be adjusted to a suitable pH value by adding sulfuric acid and then filtered for discharge. The treatment conditions and equipment are complex, the treatment time is long, the energy consumption is large, and the equipment manufacturing cost is high, which is not conducive to environmental protection and promotion. Summary of the Invention

[0005] The present invention aims to provide a fast, efficient, economical and environmentally friendly animal carcass treatment solution through the synergistic action of chemistry and biology, promoting the simultaneous realization of harmless and resource-based treatment.

[0006] To achieve the above object, the present invention discloses an animal carcass biodegradation method, which includes the following steps:

[0007] S1: Immerse the animal carcass in water.

[0008] S2: Add an animal carcass biodegradation reagent, and add alkaline protease and alkaline lipase.

[0009] S3: Raise the temperature to 40 - 55 °C and maintain it for 30 - 60 min, and keep the water circulating.

[0010] S4: Raise the temperature to 55 - 95 °C and maintain this temperature until the decomposition is complete.

[0011] Further, by weight ratio, for every 100 parts of water, 0.05 - 0.2 parts of the alkaline protease and 0.05 - 0.2 parts of the alkaline lipase are added.

[0012] Further, by weight proportion, in every 100 parts of water, the animal carcass biodegradation reagent comprises the following components in the following weight proportions: 4.35 - 45 parts of NaOH, 5 - 50 parts of KOH, and 0.5 - 5 parts of sodium methylate. By optimizing the NaOH / KOH compounding ratio (0.9:1 to 1:1) and the catalytic action of sodium methylate, the saponification efficiency is improved.

[0013] Further, the animal carcass biodegradation reagent further comprises 0.05 - 0.2 parts of an emulsifier. Utilizing the synergistic effect of alkaline protease, lipase and the emulsifier, the subsequent saponification process is accelerated through an enzymatic hydrolysis pre - reaction, solving the problem that the reaction between grease and strong alkali is insufficient in the prior art.

[0014] The present invention also discloses an animal carcass biodegradation device, which comprises a box body. The box body has a sample - containing space, a control device and a water circulation device; the sample - containing space has a sample - adding port, a sewage port, a cover plate, a valve and a heating device; the cover plate is movably connected to the sample - adding port, wherein the sample - adding port can be switched between an open state and a closed state; the valve is movably connected to the sewage port, wherein the sewage port can be switched between an open state and a closed state.

[0015] Preferably, it further comprises an over - temperature alarm device.

[0016] Preferably, the water circulation device comprises a water pump, a water suction pipe and a water injection pipe. The water suction pipe connects the sample - containing space and the water pump, and the water injection pipe connects the water pump and the sample - containing space to form a loop. The water circulation device is electrically connected to the control device.

[0017] Preferably, it further comprises a water cooling device, and the water cooling device is electrically connected to the control device.

[0018] Preferably, the water suction pipe is connected to the bottom of the sample - containing space, and the water injection pipe is connected to the upper side or the top of the side end of the sample - containing space. The water pump pumps water from the bottom, and then injects water through the upper side of the side end or the top, which can form a good water circulation, impact and disturb the area around the animal carcass, so that the reaction solution can contact the unhydrolyzed part more fully and quickly, greatly improving the hydrolysis efficiency.

[0019] The water circulation device further comprises a filter box, and the filter box is arranged between the water injection pipe and the water suction pipe.

[0020] The present invention has at least the following beneficial effects: The biological decomposition reagent for animal carcasses provided by the present invention has simple components and low cost. The method for biological decomposition of animal carcasses is simple. Under standard atmospheric pressure, by using the combination of biological decomposition reagents for animal carcasses, only the temperature needs to be controlled to quickly decompose animal carcasses. The two-stage temperature rise design and the design of continuous contact between the reaction solution and the water circulation flushing, through the combination of the optimal temperature range for enzyme activity (40 - 55 °C) and the high temperature of saponification reaction (95 °C), and the staged temperature rise strategy (enzymatic hydrolysis pre-reaction + high temperature saponification), shorten the treatment time to 1 / 3 - 1 / 2 of the traditional method. Thus, the present invention greatly reduces the energy consumption of the equipment, is significantly superior to the traditional high-temperature and high-pressure equipment, the treatment time for 3 - 5 kg animal carcasses is ≤ 4.5 hours, and it is especially suitable for the rapid community treatment of small and medium-sized urban animals and pet carcasses. The mixed solution produced after treatment meets the urban sewage discharge standard, does not cause environmental pollution, and the bones can be separated from the mixed solution. The biological decomposition device for animal carcasses is simple, occupies less land, and is light in weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a three-dimensional view of a biological decomposition device for animal carcasses;

[0022] Figure 2 is a three-dimensional view of a biological decomposition device for animal carcasses;

[0023] Figure 3 is a sectional view of a biological decomposition device for animal carcasses.

[0024] In the figure: 1. box main body; 10. sample holding space; 11. sample adding port; 12. sewage outlet; 13. cover plate; 14. heating device; 15. valve; 20. control device; 21. control circuit; 22. control panel; 23. over-temperature alarm device; 24. water level alarm device; 25. water circulation device; 251. water pump; 252. water suction pipe; 253. water injection pipe; 254. filter box; 26. water cooling device; 27. hydraulic rod; 271. storage groove; 28. sub-container; 29. pressure gauge. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious deformations. The basic principles defined in the following description can be applied to other implementation schemes, deformation schemes, improvement schemes, equivalent schemes, and other technical schemes that do not deviate from the spirit and scope of the present invention.

[0026] Those skilled in the art should understand that in the disclosure of the present invention, the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present invention.

[0027] It can be understood that the term "one" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of one element can be one, while in other embodiments, the number of this element can be multiple. The term "one" should not be construed as limiting the quantity.

[0028] Unless otherwise specified, the experimental methods used in the following examples are all conventional methods.

[0029] Unless otherwise specified, the materials, reagents, etc. used in the following examples can all be obtained commercially. The test environment is one standard atmosphere. The objects treated in the test are the corpses of cats, dogs or chickens, and the mass of the solvent is twice the mass of the animal corpse.

[0030] Example

[0031] Example 1

[0032] The present invention takes an animal corpse weighing 3.5 kg and provides an animal corpse biodegradation reagent, which includes the following components in parts by weight: 4.5 parts of NaOH, 5 parts of KOH, 0.5 part of sodium methylate, and 100 parts of water.

[0033] The application method of the animal corpse biodegradation reagent is as follows in specific steps:

[0034] S1: Immerse the animal corpse in water;

[0035] S2: Mix NaOH, KOH, sodium methylate and water according to the parts by weight ratio;

[0036] S3: Heat up to 20 °C and maintain this temperature until the decomposition is completed.

[0037] Example 2

[0038] The present invention takes an animal corpse weighing 4.5 kg and provides an animal corpse biodegradation reagent, which includes the following components in parts by weight: 4.5 parts of NaOH, 5 parts of KOH, 0.5 part of sodium methylate, and 100 parts of water.

[0039] The application method of the animal corpse biodegradation reagent is as follows in specific steps:

[0040] S1: Immerse the animal carcass in water;

[0041] S2: Mix NaOH, KOH, sodium methylate and water according to the weight ratio;

[0042] S3: Heat up to 55 °C and maintain this temperature until the decomposition is complete.

[0043] Example 3

[0044] The present invention takes an animal carcass weighing 5.2 kg and provides an animal carcass biodegradation reagent, which includes the following components in weight ratio: 4.5 parts of NaOH, 5 parts of KOH, 0.5 part of sodium methylate, and 100 parts of water.

[0045] The application method of the animal carcass biodegradation reagent is as follows:

[0046] S1: Immerse the animal carcass in water;

[0047] S2: Mix NaOH, KOH, sodium methylate and water according to the weight ratio;

[0048] S3: Heat up to 95 °C and maintain this temperature until the decomposition is complete.

[0049] Example 4

[0050] The present invention takes an animal carcass weighing 2.1 kg and provides an animal carcass biodegradation reagent, which includes the following components in weight ratio: 4.5 parts of NaOH, 5 parts of KOH, 0.5 part of sodium methylate, and 100 parts of water.

[0051] The application method of the animal carcass biodegradation reagent is as follows:

[0052] S1: Immerse the animal carcass in water;

[0053] S2: Mix NaOH, KOH, sodium methylate and water according to the weight ratio;

[0054] S3: Heat up to 95 °C and maintain this temperature until the decomposition is complete.

[0055] Example 5

[0056] The present invention takes an animal carcass weighing 1.18 kg and provides an animal carcass biodegradation reagent, which includes the following components in weight ratio: 22.5 parts of NaOH, 25 parts of KOH, 2.5 parts of sodium methylate, and 100 parts of water.

[0057] The application method of the animal carcass biodegradation reagent is as follows:

[0058] S1: Immerse the animal carcass in water;

[0059] S2: Mix NaOH, KOH, sodium methylate and water according to the weight ratio;

[0060] S3: Heat up to 95 °C and maintain this temperature until the decomposition is completed.

[0061] Example 6

[0062] The present invention takes an animal carcass weighing 1.13 kg and provides an animal carcass biodegradation reagent, which includes the following components in parts by weight: 45 parts of NaOH, 50 parts of KOH, 5 parts of sodium methylate, and 100 parts of water.

[0063] The application method of the animal carcass biodegradation reagent is as follows:

[0064] S1: Immerse the animal carcass in water;

[0065] S2: Mix NaOH, KOH, sodium methylate and water according to the weight ratio;

[0066] S3: Heat up to 95 °C and maintain this temperature until the decomposition is completed.

[0067] Table 1 Experimental data of Examples 1-6

[0068] Serial number Time (h) Temperature (°C) Cat / dog / chicken carcass (kg) Water (kg) Sodium methylate (g) KOH (g) NaOH (g) 1 26 20 3.5 7 35 350 315 2 19 55 4.5 9 45 450 405 3 14 95 5.2 10.4 52 520 468 4 12 95 2.1 4.2 42 420 378 5 7.8 95 1.18 2.36 59 590 531 6 6.8 95 1.13 2.26 113 1130 1017

[0069] It can be seen from the experimental results in Table 1 that by increasing the treatment temperature, the treatment time can be significantly shortened.

[0070] When heated up to 95 °C, the solubility of NaOH and KOH in water is high at this time. The saponification reaction rate of NaOH and KOH is the best at this temperature, and the reaction general formula can be expressed as: oil and fat react with sodium hydroxide / potassium hydroxide to generate sodium / potassium higher fatty acid salt and glycerol, where the higher fatty acid salt is the main component of soap, and the only difference is that the soap hydrolyzed by potassium hydroxide is soft.

[0071] In the following examples, during the decomposition process, a water circulation device 25 is used to keep the water in the sample space 10 in a circulating flow state, so that the water mixed with the decomposition reagent impacts and disturbs the animal carcass.

[0072] Example 7

[0073] The present invention takes an animal carcass weighing 3.78 kg and provides an animal carcass biodegradation reagent, which includes the following components in parts by weight: 4.35 parts of NaOH, 5 parts of KOH, 0.5 part of sodium methylate, 100 parts of water, 0.05 part of alkaline protease, 0.05 part of alkaline lipase, and 0.05 part of emulsifier.

[0074] The application method of the animal carcass biodegradation reagent is as follows:

[0075] S1: Immerse the animal carcass in water;

[0076] S2: Mix NaOH, KOH, sodium methylate, alkaline protease, alkaline lipase, emulsifier and water according to the weight ratio;

[0077] S3: Heat up to 40 °C and maintain for 60 min, then heat up to 95 °C and maintain this temperature until decomposition is completed.

[0078] Example 8

[0079] The present invention takes an animal carcass weighing 4.2 kg and provides an animal carcass biodegradation reagent, which includes the following components in the weight ratio: 4.35 parts of NaOH, 5 parts of KOH, 0.5 part of sodium methylate, 100 parts of water, 0.05 part of alkaline protease, 0.05 part of alkaline lipase, and 0.05 part of emulsifier.

[0080] The application method of the animal carcass biodegradation reagent is as follows:

[0081] S1: Immerse the animal carcass in water;

[0082] S2: Mix NaOH, KOH, sodium methylate, alkaline protease, alkaline lipase, emulsifier and water according to the weight ratio;

[0083] S3: Heat up to 50 °C and maintain for 40 min, then heat up to 95 °C and maintain this temperature until decomposition is completed.

[0084] Example 9

[0085] The present invention takes an animal carcass weighing 5.0 kg and provides an animal carcass biodegradation reagent, which includes the following components in the weight ratio: 4.35 parts of NaOH, 5 parts of KOH, 0.5 part of sodium methylate, 100 parts of water, 0.05 part of alkaline protease, 0.05 part of alkaline lipase, and 0.05 part of emulsifier.

[0086] The application method of the animal carcass biodegradation reagent is as follows:

[0087] S1: Immerse the animal carcass in water;

[0088] S2: Mix NaOH, KOH, sodium methylate, alkaline protease, alkaline lipase, emulsifier and water according to the weight ratio;

[0089] S3: Heat up to 55 °C and maintain for 30 min, then heat up to 95 °C and maintain this temperature until decomposition is completed.

[0090] Table 2 Experimental data of Examples 7-9

[0091]

[0092] The alkaline protease is incubated at a water temperature of 40-55°C for 30-60 minutes. Under this temperature and in an alkaline solution environment with 11≥PH≥9, the maximum activity of the alkaline protease can be maintained. The optimal proportion of the added alkaline protease is 0.05-0.2% of the aqueous solution. Its main functions are as follows: 1. It changes the structure of complex macromolecular proteins into simple small peptide chains or amino acids, making it easier to react with alkaline solutions. 2. It partially destroys the protein structure, enabling the separation of substance components.

[0093] The optimal activity conditions of alkaline lipase are basically the same as those of alkaline protease. Its main function is to hydrolyze glycerides (oils, fats, etc.) on animal carcasses, and fatty acids, diglycerides, monoglycerides, and glycerol can be released. NaOH and KOH in the alkaline solution will react preferentially with the products decomposed by lipase.

[0094] From the experimental results in Table 2, it can be seen that when treating 3-5 kg of animal carcasses, the treatment time is significantly shortened, only about 4 hours, which significantly improves the treatment efficiency.

[0095] To promote the speed of the saponification reaction, preferably, 0.05-0.2% of OP-15 or OP-10 in the aqueous solution can be added as an emulsifier. When oil is dropped into water and stirred vigorously, the oil is crushed into fine beads and mixed into an emulsion. However, when the stirring stops, it will re-layer. After adding the emulsifier and stirring vigorously, due to the emulsification effect, it is not easy to layer even after standing for a long time. The oil is wrapped by the surfactant, enabling good emulsification of the oil. Under the emulsification effect, the reaction between NaOH / KOH and the oil can be more sufficient.

[0096] After the hydration is completed, the mixture aqueous solution at this time contains sodium / potassium higher fatty acid salts and glycerol, sodium / potassium sulfide, partially unreacted sodium hydroxide / potassium hydroxide, sodium carbonate / potassium carbonate, sodium bicarbonate / potassium bicarbonate and other mixtures. After detection, 11≥PH≥7 for the mixture aqueous solution at this time, meeting the urban sewage discharge standard.

[0097] What remains after discharging the hydrolyzed mixture solution is the inorganic bones of the animal, mainly composed of calcium phosphate. The hydroxyl groups that make up the bones have broken under the previous alkaline solution and high-temperature environment. After picking up the remaining calcium phosphate and washing it with clean water and then drying it, the bones of pets can be obtained.

[0098] 1. Box main body; 10. Sample holding space; 11. Sample loading port; 12. Sewage outlet; 13. Cover plate; 14. Heating device; 15. Valve; 20. Control device; 21. Control circuit; 22. Control panel; 23. Over-temperature alarm device; 24. Water level alarm device; 25. Water circulation device; 251. Water pump; 252. Water suction pipe; 253. Water injection pipe; 254. Filter box; 26. Water cooling device; 27. Hydraulic rod; 271. Storage groove; 28. Sub-container; 29. Pressure gauge.

[0099] Referring to the accompanying drawings of the specification of the present invention Figures 1 to 3 , an animal carcass biodegradation device according to a preferred embodiment of the present invention will be disclosed and described hereinafter, wherein the animal carcass biodegradation device includes a box main body 1, and the box main body 1 has a sample holding space 10, a control device 20 and a water circulation device 25.

[0100] Specifically, the sample holding space 10 has a sample loading port 11, a sewage outlet 12, a cover plate 13, a valve 15, and a heating device 14. The cover plate 13 is movably connected to the sample loading port 11, and the sample loading port 11 can be switched between an open state and a closed state; the valve 15 is movably connected to the sewage outlet 12, and the sewage outlet 12 can be switched between an open state and a closed state.

[0101] The control device 20 includes at least one control circuit 21 and a control panel 22. The control device 20 is electrically connected to the heating device, and the control device 20 can control the heating process and heating temperature of the heating device. In some embodiments, the control device 20 is electrically connected to the valve 15, and the control device 20 can control the sewage outlet 12 to be in the open or closed state.

[0102] In use, the animal carcass can be placed into the sample-containing space 10 from the sample-loading port 11, and a quantitative amount of water and decomposition formula are added into the sample-containing space 10. Then, the cover plate 13 is covered, and the heating device 14 is controlled by the control panel 22 to heat and control the temperature of the sample-containing space 10, so that a certain temperature is reached in the sample-containing space 10 to hydrolyze the animal carcass. At the same time, the water circulation device 25 will extract the water in the sample-containing space 10 for water flow circulation, and the circulating water flow will impact and disturb the animal carcass, so that the reaction solution can contact the unhydrolyzed part more fully and quickly. Under standard atmospheric pressure, the device can perform the decomposition treatment of the animal carcass through two-stage temperature control of the heating device, so that the device can better implement the staged temperature increase strategy (enzymatic hydrolysis pre-reaction + high-temperature saponification) through the combination of the optimal temperature range (40-55 °C) of enzyme activity and the high temperature (95 °C) of saponification reaction, greatly improving the hydrolysis efficiency, significantly reducing the energy consumption of the device, being significantly superior to traditional high-temperature and high-pressure devices, and being particularly suitable for the rapid community treatment of urban small animals and pet carcasses. During the treatment, the provided cover plate 13 can be sealed to prevent the smell from escaping. The mixed liquid generated after the treatment meets the urban sewage discharge standard and can be discharged from the provided sewage outlet, without causing environmental pollution. The bones can also be separated from the mixed solution. It has a simple structure, occupies less land, is light in weight, and is convenient for preparation and movement.

[0103] In other embodiments, the animal carcass biodegradation device further includes an over-temperature alarm device 23.

[0104] In other embodiments, the animal carcass biodegradation device further includes a water level alarm device 24.

[0105] In other embodiments, for the water circulation device 25 of the animal carcass biodegradation device, it includes a water pump 251, a water suction pipe 252, and a water injection pipe 253. The water suction pipe 252 connects the sample-containing space 10 and the water pump 251, and the water injection pipe 253 connects the water pump 251 and the sample-containing space 10 to form a loop. The water circulation device 25 is electrically connected to the control device 20.

[0106] Preferably, the connection port position of the water injection pipe 253 and the sample-containing space 10 is higher than the connection port position of the water suction pipe 252 and the sample-containing space 10 in the vertical direction.

[0107] Preferably, the water pump 251 is a high-temperature and acid-base resistant water pump 251, and the water pipe is a high-temperature and acid-base resistant water pipe. By setting the water circulation device 25, the liquid flow in the sample-containing space 10 can be promoted, continuously flushing the animal carcass being treated, improving the treatment efficiency, and shortening the treatment time.

[0108] In some embodiments, the water circulation device 25 further includes a filter tank 254, and the filter tank 254 is disposed between the water injection pipe 253 and the water extraction pipe 252.

[0109] The filter tank 254 may be an activated carbon tank, which can be used to adsorb the odor in the circulating water and improve the treatment environment. The water pump 251 pumps the liquid in the sample containing space 10 into the filter tank 254, and after passing through the filter tank 254, the liquid re-enters the sample containing space 10 and flushes the animal carcass being processed again.

[0110] Preferably, the connection port position of the water injection pipe 253 and the sample containing space 10 is higher than the connection port position of the water extraction pipe 252 and the sample containing space 10 in the vertical direction.

[0111] In other embodiments, the water extraction pipe 252 is connected to the bottom of the sample containing space 10, and the water injection pipe 253 is connected to the upper side or the top of the side end of the sample containing space 10. The water pump 251 pumps water from the bottom and then injects water from the upper side or the top of the side end, which can form a good water circulation, impact and disturb the surrounding of the animal carcass, so that the reaction solution can contact the unhydrolyzed part more fully and quickly, greatly improving the hydrolysis efficiency and shortening the treatment time.

[0112] In other embodiments, the animal carcass biodegradation device further includes a water cooling device 26. The water cooling device 26 is electrically connected to the control device 20.

[0113] In other embodiments, the animal carcass biodegradation device further includes a hydraulic rod 27. Both ends of the hydraulic rod 27 are respectively connected to the box body 1 and the cover plate 13 through universal joints (not shown in the figure), which is convenient for automatic opening and closing control of the cover plate 13 and can also avoid the situation of injury caused by unstable support during the opening and closing process of the cover plate 13 or after it is opened.

[0114] In other embodiments, the animal carcass biodegradation device further includes a sub-container 28. The sub-container 28 is disposed in the sample containing space 10 and is used for processing small animal carcasses, ensuring that the sample containing space 10 can process large animal carcasses while avoiding waste of water resources and the like caused by processing small animal carcasses.

[0115] In other embodiments, the animal carcass biodegradation device further includes a pressure gauge 29. The pressure gauge 29 is connected to the sample containing space 10 and is used to detect the pressure in the sample containing space 10. The pressure gauge 29 is electrically connected to the control panel 22. When the pressure in the sample containing space 10 decreases to a certain extent compared with the pressure at the beginning of decomposition, it can be determined that the carcass decomposition is completed, enabling the device to judge the degree of carcass decomposition by measuring the change in pressure in the sample containing space 10 through the pressure gauge 29, avoiding judgment such as opening the cover for observation and reducing the situation of cover opening pollution and the like.

[0116] Those skilled in the art can understand that the above embodiments are only examples, and the features of different embodiments can be combined with each other to obtain embodiments that are easily conceivable based on the content disclosed in the present invention but not explicitly pointed out in the drawings.

[0117] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the drawings are only examples and do not limit the present invention. The object of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and without departing from the said principles, the embodiments of the present invention can have any deformation or modification.

Claims

1. A method for biological decomposition of animal carcasses, characterized in that: The following steps are involved: S1: Soak the animal carcass in water; S2: adding animal carcass biodegradation reagents, adding alkaline protease and alkaline lipase; S3: Raise the temperature to 40-55℃ and maintain for 30-60min, and keep the water circulating; S4: Raise the temperature to 55-95°C and maintain the temperature until decomposition is complete.

2. The method for biological decomposition of animal carcasses according to claim 1, characterized in that: In terms of weight proportion, 0.05-0.2 parts of alkaline protease and 0.05-0.2 parts of alkaline lipase are added to every 100 parts of water.

3. The method for biological decomposition of animal carcasses according to claim 1, characterized in that: In terms of weight parts, the animal carcass biodegradation reagent includes the following components in every 100 parts of water: 4.35-45 parts of NaOH, 5-50 parts of KOH, and 0.5-5 parts of methyl sodium.

4. The method for biological decomposition of animal carcasses according to claim 1, characterized in that: The animal carcass biodegradation reagent also includes 0.05-0.2 parts of an emulsifier.

5. The animal carcass biodegradation device according to claim 1, characterized in that: The invention comprises a box body, wherein the box body has a sample holding space, a control device and a water circulation device; the sample holding space has a sample adding port, a sewage port, a cover plate, a valve and a heating device; the cover plate is movably connected to the sample adding port, wherein the sample adding port can be switched between an open state and a closed state; the valve is movably connected to the sewage port, wherein the sewage port can be switched between an open state and a closed state.

6. The animal carcass biodegradation device according to claim 5, characterized in that: Also includes an over-temperature alarm device.

7. The animal carcass biodegradation device according to claim 5, characterized in that: The water circulation device includes a water pump, a water extraction pipe and a water injection pipe. The water extraction pipe connects the sample holding space and the water pump, and the water injection pipe connects the water pump and the sample holding space to form a loop. The water circulation device is electrically connected to the control device.

8. The animal carcass biodegradation device according to claim 5, characterized in that: It also includes a water cooling device, which is electrically connected to the control device.

9. The animal carcass biodegradation device according to claim 7, characterized in that: The water pumping pipe is connected to the bottom of the sample containing space.

10. The animal carcass biodegradation device according to claim 7, characterized in that: The water circulation device also includes a filter box, which is arranged between the water injection pipe and the water extraction pipe.

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