CN115301699A - Method for jointly performing anaerobic digestion on chemical residue of livestock and poultry died of diseases and kitchen waste slurry - Google Patents
Method for jointly performing anaerobic digestion on chemical residue of livestock and poultry died of diseases and kitchen waste slurry Download PDFInfo
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- 244000144977 poultry Species 0.000 title claims abstract description 91
- 244000144972 livestock Species 0.000 title claims abstract description 85
- 201000010099 disease Diseases 0.000 title claims abstract description 67
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 60
- 239000010806 kitchen waste Substances 0.000 title claims abstract description 47
- 230000029087 digestion Effects 0.000 title claims abstract description 45
- 239000002002 slurry Substances 0.000 title claims abstract description 41
- 239000000126 substance Substances 0.000 title claims description 27
- 230000008569 process Effects 0.000 claims abstract description 23
- 210000004911 serous fluid Anatomy 0.000 claims abstract description 18
- 238000002156 mixing Methods 0.000 claims abstract description 13
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 40
- 239000000463 material Substances 0.000 claims description 38
- 238000004537 pulping Methods 0.000 claims description 33
- 239000011268 mixed slurry Substances 0.000 claims description 30
- 238000003756 stirring Methods 0.000 claims description 23
- 238000002360 preparation method Methods 0.000 claims description 21
- 239000004519 grease Substances 0.000 claims description 17
- 238000002309 gasification Methods 0.000 claims description 16
- 241001465754 Metazoa Species 0.000 claims description 10
- 239000003225 biodiesel Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000002844 melting Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 8
- 238000004064 recycling Methods 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 5
- 239000002893 slag Substances 0.000 claims description 4
- 238000000265 homogenisation Methods 0.000 claims description 2
- 238000001311 chemical methods and process Methods 0.000 claims 1
- 238000012824 chemical production Methods 0.000 claims 1
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 abstract description 6
- 238000004659 sterilization and disinfection Methods 0.000 description 10
- 230000009471 action Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
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- 230000009286 beneficial effect Effects 0.000 description 2
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- 241000894006 Bacteria Species 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/30—Destroying solid waste or transforming solid waste into something useful or harmless involving mechanical treatment
- B09B3/35—Shredding, crushing or cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/30—Destroying solid waste or transforming solid waste into something useful or harmless involving mechanical treatment
- B09B3/38—Stirring or kneading
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/60—Biochemical treatment, e.g. by using enzymes
- B09B3/65—Anaerobic treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Abstract
The invention discloses a method for jointly anaerobically digesting residue produced by livestock and poultry died of diseases and kitchen waste slurry. The method utilizes the advantages of combining kitchen waste treatment and harmless treatment projects of the livestock and poultry died of diseases to jointly carry out anaerobic digestion on the residues produced by the livestock and poultry died of diseases and the kitchen waste serous fluid, adjusts the carbon-nitrogen ratio of the mixed serous fluid by controlling the mixing ratio of the mixed serous fluid, meets the carbon-nitrogen ratio requirement of the anaerobic digestion process, and further reduces the treatment and utilizes the resources of the mixed serous fluid by effectively carrying out anaerobic digestion on the mixed serous fluid.
Description
Technical Field
The invention relates to the technical field of high-temperature anaerobic digestion, in particular to a method for jointly carrying out anaerobic digestion on chemical residues of livestock and poultry died of diseases and kitchen waste slurry.
Background
The death of livestock and poultry caused by diseases or disasters is a frequent condition in the livestock and poultry breeding process, but if the dead livestock and poultry caused by diseases are not well treated or are randomly discarded, the related epidemic diseases can be diffused and spread in a large area, and the pathogens of the livestock and poultry latent for a long time can also cause deep pollution to the livestock and poultry breeding environment. Therefore, how to carry out innocent treatment on livestock and poultry died of diseases is a problem which must be solved in the animal husbandry at present.
The harmless treatment of livestock and poultry died of diseases refers to the process of carrying out safe treatment on biological or chemical harmful substances in the bodies of animals died of diseases and animal products and related animals to eliminate harm, and has great significance for reducing environmental pollution and ensuring food safety. The existing harmless treatment methods for livestock and poultry died of diseases mainly comprise an incineration method, a chemical preparation method, a burying method, a fermentation method and the like, but the existing harmless treatment methods are not used as resources and have difficult residue treatment.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method for carrying out combined anaerobic digestion on chemical residue and kitchen waste slurry of livestock and poultry died of diseases, and solves the problems that resource utilization cannot be realized and residue treatment is difficult in the existing harmless treatment technology of livestock and poultry died of diseases.
In order to solve the technical problem, the technical scheme adopted by the invention is as follows:
a method for united anaerobic digestion of chemical residue of livestock and poultry died of diseases and kitchen waste slurry adopts the following process:
crushing the livestock and poultry materials died of diseases → wet processing of the livestock and poultry died of diseases → water distribution and pulping of chemical processing residues → mixing and homogenizing with kitchen waste slurry → deoiling the mixed slurry, wherein the obtained oil is used for producing biodiesel → the residual mixed slurry enters an anaerobic tank for anaerobic digestion process to produce biogas → biogas is purified and utilized.
Further, the wet method for preparing the livestock and poultry died of diseases comprises the following steps:
s11, a feeding system: feeding the livestock and poultry materials died of diseases into a crushing system;
s12, crushing system: crushing livestock and poultry materials died of diseases;
s13, a high-temperature high-pressure preparation process: and adding the crushed dead poultry materials into a high-temperature high-pressure gasification machine through an injection pump for high-temperature high-pressure wet gasification.
Further, the combined anaerobic digestion process comprises:
s21, discharging spiral: conveying the residue after the preparation to a stirring tank;
s22, stirring tank: mixing the residue with water, and stirring to obtain slurry; the mass ratio of the pulping amount of the livestock and poultry residues died of the disease to the material amount of the livestock and poultry died of the disease is as follows: 2-2.5, and the TS actually measured is less than 10%;
s23, pulping: the slag pulp enters a pulping machine for further crushing and pulping, and the prepared livestock and poultry slag pulp died of diseases and the kitchen waste pulp are fully and uniformly mixed; wherein, the mass ratio of the livestock and poultry serous fluid died of illness to the mixed serous fluid is less than 7.5%; the mass ratio of the pulping amount of the kitchen waste to the amount of the kitchen waste is as follows: 1-1.1, TS about 10% is measured;
s24, horizontal separation oil removal: the mixed slurry enters an oil removal system to separate grease; the method comprises the following specific steps: heating the mixed slurry, separating oil phase in a horizontal centrifuge, and further deslagging and dewatering the oil phase in a butterfly centrifuge to obtain animal and plant mixed oil with purity of more than 97%; the obtained grease is used for producing biodiesel;
s25, anaerobic tank: the deoiled mixed slurry enters an anaerobic tank for anaerobic digestion to generate biogas, and the generated biogas is recycled;
s26, finally purifying the prepared methane, and recycling the methane.
Further, the high-temperature high-pressure chemical manufacturing process parameters in the step S13 are as follows: the pressure in the melting machine is more than or equal to 0.3Mpa, the temperature is more than or equal to 135 ℃, and the melting time is more than 30 min; the materials achieve the effect of thorough disinfection and sterilization under the conditions of high temperature and high pressure; meanwhile, under the action of spiral stirring, the materials are decomposed into slurry, so that the rear end of the device can be further treated conveniently.
Further, in the step S24, the mixed slurry is heated to 65 to 75 ℃.
Further, in the step S25, the acidity of the anaerobic tank is not higher than 4500mg/L, and the acid-base ratio is less than 0.4, and combined feeding may be performed.
Further, in the step S25, the temperature of the anaerobic tank is controlled to 55 ± 0.5 ℃, which is more suitable for generating methane bacteria.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention combines the anaerobic process, the residue after innocent treatment of livestock and poultry died of illness and kitchen waste are mixed after being respectively mixed with water and slurrying, the process requirement of the anaerobic digestion process on the carbon-nitrogen ratio of materials can be met by controlling the mixing proportion of the mixed slurry, the anaerobic digestion is carried out, and the problem of difficult treatment of the residue of livestock and poultry died of illness is solved; meanwhile, the grease obtained by oil removal treatment and recovery and the methane generated by anaerobic digestion in the process can be used as energy, so that resource utilization is realized, and economic value is created.
2. The anaerobic technology is combined, and about 100 kg of grease can be recovered when each ton of dead livestock and poultry are treated; processing the cultivation method for each ton of livestock and poultry died of diseases, wherein about 200m of biogas can be generated; the residue is further reduced and treated, and after anaerobic digestion, the residue can be reduced by more than 85%. Realizes further reduction, resource utilization and harmless treatment of the livestock and poultry died of diseases.
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FIG. 1 is a process flow diagram of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described with reference to the following specific examples, but the embodiments of the present invention are not limited thereto.
Referring to fig. 1, a method for anaerobic digestion of chemical residues of livestock and poultry died of diseases and kitchen waste slurry by combining the following processes:
crushing livestock and poultry materials died of diseases → wet-process preparation of livestock and poultry died of diseases → pulping by water mixing of residues → mixing and homogenization with kitchen waste slurry → oil removal treatment of the mixed slurry (grease is used for producing biodiesel) → the rest mixed slurry enters an anaerobic tank for anaerobic digestion to generate methane → methane is purified and utilized.
The method comprises the following specific steps:
(1) Wet chemical preparation of residues of livestock and poultry died of diseases:
s11, a feeding system: feeding the livestock and poultry materials died of diseases into a crushing system;
s12, crushing system: crushing livestock and poultry materials died of diseases;
s13, high-temperature high-pressure gasification machine: adding the crushed dead poultry materials into a high-temperature high-pressure gasification machine through an injection pump for high-temperature high-pressure wet gasification; chemical preparation process parameters: the pressure in the curing machine is more than or equal to 0.3Mpa, the temperature is more than or equal to 135 ℃, and the curing time is more than 30 min; the materials achieve the effect of thorough disinfection and sterilization under the conditions of high temperature and high pressure; meanwhile, under the action of spiral stirring, the materials are dissolved into slurry, so that the rear end can be further treated conveniently;
(2) The combined anaerobic digestion process comprises the following steps:
s21, discharging spiral: conveying the residue after the preparation to a stirring tank;
s22, stirring tank: mixing the residue with water, and stirring to obtain slurry; the mass ratio of the pulping amount of the livestock and poultry residues died of diseases to the livestock and poultry materials died of diseases is as follows: 2-2.5, and the TS actually measured is less than 10%; (TS means "solids content" which means the percentage of the solids content of a mixture, and is used here primarily to determine the organic content of the slurry, since the solids in the slurry are almost all organic)
S23, pulping machine: the residue pulp enters a pulping machine for further crushing and pulping, and is uniformly mixed with the kitchen waste pulp in proportion; wherein the mass ratio of the livestock and poultry serous fluid died of illness to the mixed serous fluid is less than 7.5%; the mass ratio of the pulping amount of the kitchen waste to the amount of the kitchen waste is as follows: 1-1.1, TS about 10% is measured;
s24, horizontal separation oil removal: the mixed slurry enters an oil removal system to separate grease; the method comprises the following specific steps: heating the mixed slurry to 65-75 ℃, separating an oil phase in a horizontal centrifuge, and further deslagging and dewatering the oil phase in a butterfly centrifuge to obtain animal and plant mixed oil with the purity of more than 97%; the obtained grease is used for producing biodiesel;
s25, anaerobic tank: and the deoiled mixed slurry enters an anaerobic tank for anaerobic digestion to generate biogas, and the generated biogas is recycled. Wherein, the acidity of the anaerobic tank is not higher than 4500mg/L, and the pH ratio is less than 0.4, so that combined feeding can be carried out; the temperature is controlled to be more suitable for methanogen at 55 +/-0.5 ℃;
s26, finally purifying the prepared methane, and recycling the methane.
Example 1
A method for jointly carrying out anaerobic digestion on chemical residues of livestock and poultry died of diseases and kitchen waste slurry comprises the following specific steps:
(1) Wet chemical preparation of residues of livestock and poultry died of diseases:
s11, a feeding system: feeding the livestock and poultry materials died of diseases into a crushing system;
s12, crushing system: crushing livestock and poultry materials died of diseases;
s13, high-temperature high-pressure gasification machine: adding the crushed dead poultry materials into a high-temperature high-pressure gasification machine through an injection pump for high-temperature high-pressure wet gasification; chemical preparation process parameters: the pressure in the melting machine is 0.3Mpa, the temperature is 135 ℃, and the melting time is 35min; the materials achieve the effect of thorough disinfection and sterilization under the conditions of high temperature and high pressure; meanwhile, under the action of spiral stirring, the materials are decomposed into slurry, so that the rear end of the slurry is convenient to further treat;
(2) The combined anaerobic digestion process comprises the following steps:
s21, discharging spiral: conveying the residue after the preparation to a stirring tank;
s22, a stirring tank: mixing the residue with water, and stirring to obtain slurry; wherein the mass ratio of the pulping amount of the residues of the livestock and poultry died of diseases to the material amount of the livestock and poultry died of diseases is 2:1;
s23, pulping machine: the residue pulp enters a pulping machine for further crushing and pulping, and is uniformly mixed with the kitchen waste pulp in proportion; wherein the livestock and poultry serous fluid died of illness accounts for 6.5% of the mixed serous fluid by mass; the mass ratio of the pulping amount of the kitchen waste to the amount of the kitchen waste is as follows: 1:1; the TS is actually measured to be about 10%;
s24, horizontal separation oil removal: the mixed slurry enters an oil removal system to separate grease; the method comprises the following specific steps: heating the mixed slurry to 65 ℃, separating an oil phase in a horizontal centrifuge, and further deslagging and dewatering the oil phase in a butterfly centrifuge to obtain animal and plant mixed oil with the purity of more than 97%; the obtained grease is used for producing biodiesel;
s25, anaerobic tank: and the deoiled mixed slurry enters an anaerobic tank for anaerobic digestion to generate biogas, and the generated biogas is recycled. Wherein, the acidity of the anaerobic tank is 4400mg/L, and the acid-base ratio is 0.3, and the combined feeding can be carried out; the temperature is controlled to be more suitable for methanogen at 55 +/-0.5 ℃;
s26, finally purifying the prepared methane, and recycling the methane.
Example 2
A method for jointly carrying out anaerobic digestion on chemical residues of livestock and poultry died of diseases and kitchen waste slurry comprises the following specific steps:
(1) Wet chemical preparation of residues of livestock and poultry died of diseases:
s11, a feeding system: feeding the livestock and poultry materials died of diseases into a crushing system;
s12, crushing system: crushing livestock and poultry materials died of diseases;
s13, high-temperature high-pressure gasification machine: adding the crushed dead poultry materials into a high-temperature high-pressure gasification machine through an injection pump for high-temperature high-pressure wet gasification; chemical preparation process parameters: the pressure in the melting machine is 5Mpa, the temperature is 200 ℃, and the melting time is 60min; the materials achieve the effect of thorough disinfection and sterilization under the conditions of high temperature and high pressure; meanwhile, under the action of spiral stirring, the materials are decomposed into slurry, so that the rear end of the slurry is convenient to further treat;
(2) The combined anaerobic digestion process comprises the following steps:
s21, discharging spiral: conveying the residue after the preparation to a stirring tank;
s22, a stirring tank: mixing the residue with water, and stirring to obtain slurry; wherein the mass ratio of the pulping amount of the livestock and poultry residues died of diseases to the material amount of the livestock and poultry died of diseases is 2.2;
s23, pulping machine: the residue pulp enters a pulping machine for further crushing and pulping, and is uniformly mixed with the kitchen waste pulp in proportion; wherein the livestock and poultry serous fluid died of illness accounts for 7% of the mass ratio of the mixed serous fluid; the mass ratio of the pulping amount of the kitchen waste to the amount of the kitchen waste is as follows: 1.1;
s24, horizontal separation oil removal: the mixed slurry enters an oil removal system to separate grease; the method comprises the following specific steps: heating the mixed slurry to 70 ℃, separating an oil phase in a horizontal centrifuge, and further deslagging and dewatering the oil phase in a butterfly centrifuge to obtain animal and plant mixed oil with the purity of more than 97%; the obtained grease is used for producing biodiesel;
s25, anaerobic tank: and (4) allowing the deoiled mixed slurry to enter an anaerobic tank for anaerobic digestion to generate biogas, and recycling the generated biogas. Wherein, the acidity of the anaerobic tank is 4400mg/L, and the acid-base ratio is 0.3, and the combined feeding can be carried out; the temperature is controlled to be more suitable for methanogen at 55 +/-0.5 ℃;
s26, finally purifying the prepared methane, and recycling the methane.
Example 3
A method for jointly carrying out anaerobic digestion on chemical residues of livestock and poultry died of diseases and kitchen waste slurry comprises the following specific steps:
(1) Wet chemical preparation of residues of livestock and poultry died of diseases:
s11, a feeding system: feeding the livestock and poultry materials died of diseases into a crushing system;
s12, crushing system: crushing livestock and poultry materials died of diseases;
s13, high-temperature high-pressure gasification machine: adding the crushed poultry materials died of diseases into a high-temperature high-pressure gasification machine through an injection pump to carry out high-temperature high-pressure wet gasification; chemical preparation process parameters: the pressure in the curing machine is 5Mpa, the temperature is 200 ℃, and the curing time is 60min; the materials achieve the effect of thorough disinfection and sterilization under the conditions of high temperature and high pressure; meanwhile, under the action of spiral stirring, the materials are decomposed into slurry, so that the rear end of the slurry is convenient to further treat;
(2) The combined anaerobic digestion process comprises the following steps:
s21, discharging spiral: conveying the residue after the preparation to a stirring tank;
s22, a stirring tank: mixing the residue with water, and stirring to obtain slurry; wherein the mass ratio of the pulping amount of the livestock and poultry residues died of diseases to the material amount of the livestock and poultry died of diseases is 2.5;
s23, pulping machine: the residue slurry enters a pulping machine for further crushing and pulping, and is uniformly mixed with the kitchen waste slurry in proportion; wherein the mass ratio of the livestock and poultry serous fluid died of illness to the mixed serous fluid is 7%; the mass ratio of the pulping amount of the kitchen waste to the amount of the kitchen waste is as follows: 1.1;
s24, horizontal separation oil removal: the mixed slurry enters an oil removal system to separate grease; the method comprises the following specific steps: heating the mixed slurry to 75 ℃, separating an oil phase in a horizontal centrifuge, and further deslagging and dewatering the oil phase in a butterfly centrifuge to obtain animal and plant mixed oil with the purity of more than 97%; the obtained grease is used for producing biodiesel;
s25, anaerobic tank: and (4) allowing the deoiled mixed slurry to enter an anaerobic tank for anaerobic digestion to generate biogas, and recycling the generated biogas. Wherein, the acidity of the anaerobic tank is 4500mg/L, and the acid-base ratio is 0.35, and the combined feeding can be carried out; the temperature is controlled to be more suitable for methanogen at 55 +/-0.5 ℃;
s26, finally purifying the prepared methane, and recycling the methane.
In 2021, the applicant adopts the method of the combined anaerobic digestion of the chemical residue of livestock and poultry died of diseases and the kitchen waste serous fluid to process 510 tons of livestock and poultry died of diseases, 4.36 ten thousand tons of kitchen waste and 2000 tons of recovered grease, and then 249 ten thousand m of methane is produced for carrying out the year. At present, the combined anaerobic digestion process normally operates. Successfully realizes the reduction treatment and resource utilization of the dead livestock and poultry, and has higher application value and economic value.
The invention adopts a wet-process preparation and anaerobic digestion process, the residue after the wet-process preparation of the livestock and poultry died of illness is uniformly mixed with the water-mixed pulp and the kitchen waste slurry, and the residue is further subjected to reduction treatment and resource utilization through the oil separation and combined anaerobic fermentation. The residue of livestock and poultry died of diseases after wet processing has complex components, higher organic nitrogen content and lower carbon-nitrogen ratio, which is not beneficial to anaerobic digestion process. According to the invention, by utilizing the advantages of the combined construction of the kitchen waste treatment and the harmless treatment project of livestock and poultry died of diseases, the residue produced by the chemical treatment of the livestock and poultry died of diseases and the kitchen waste slurry are subjected to combined anaerobic digestion, the carbon-nitrogen ratio of the mixed slurry is adjusted by controlling the mixing ratio of the mixed slurry, the requirement of the anaerobic digestion process on the carbon-nitrogen ratio is met, the mixed slurry is subjected to effective anaerobic digestion, and the reduction treatment and the resource utilization are further realized. The obtained grease can be used for producing biodiesel, and the methane can also be recycled.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all that should be covered by the claims of the present invention.
Claims (7)
1. A method for united anaerobic digestion of chemical residues of livestock and poultry died of diseases and kitchen waste slurry is characterized by comprising the following steps:
crushing the livestock and poultry materials died of diseases → wet-process preparation of the livestock and poultry died of diseases → preparation of residue and water for pulping → mixing and homogenization with kitchen waste slurry → deoiling treatment of the mixed slurry, wherein the obtained oil is used for producing biodiesel → the residual mixed slurry enters an anaerobic tank to be subjected to combined anaerobic digestion process to produce methane → methane is purified and utilized.
2. The method for the wet processing of the livestock and poultry died of illness by combining the residues produced by the livestock and poultry died of illness with the kitchen waste slurry according to claim 1, which is characterized in that the method for the wet processing of the livestock and poultry died of illness by combining the residues with the kitchen waste slurry comprises the following steps:
s11, a feeding system: feeding the livestock and poultry materials died of diseases into a crushing system;
s12, crushing system: crushing livestock and poultry materials died of diseases;
s13, a high-temperature high-pressure preparation process: and adding the crushed dead poultry materials into a high-temperature high-pressure gasification machine through an injection pump for high-temperature high-pressure wet gasification.
3. The method for united anaerobic digestion of the chemical residue of livestock and poultry died of illness and kitchen waste slurry according to claim 1, wherein the united anaerobic digestion process comprises:
s21, discharging spiral: conveying the residue after the preparation to a stirring tank;
s22, a stirring tank: mixing the residue with water, and stirring to obtain slurry; the mass ratio of the pulping amount of the livestock and poultry residues died of the disease to the material amount of the livestock and poultry died of the disease is as follows: 2-2.5;
s23, pulping machine: the slag pulp enters a pulping machine for further crushing and pulping, and the prepared livestock and poultry slag pulp died of diseases and the kitchen waste pulp are fully and uniformly mixed; wherein, the mass ratio of the livestock and poultry serous fluid died of illness to the mixed serous fluid is less than 7.5%; the mass ratio of the pulping amount of the kitchen waste to the amount of the kitchen waste is as follows: 1-1.1;
s24, horizontal separation oil removal: the mixed slurry enters an oil removal system to separate grease; the method comprises the following specific steps: heating the mixed slurry, separating oil phase in a horizontal centrifuge, and further deslagging and dewatering the oil phase in a butterfly centrifuge to obtain animal and plant mixed oil with purity of more than 97%; the obtained grease is used for producing biodiesel;
s25, anaerobic tank: the deoiled mixed slurry enters an anaerobic tank for anaerobic digestion to generate biogas, and the generated biogas is recycled;
s26, finally purifying the prepared methane, and recycling the methane.
4. The method for united anaerobic digestion of the chemical residue of livestock and poultry died of illness and kitchen waste slurry according to claim 2, wherein the high-temperature high-pressure chemical process parameters in step S13 are as follows: the pressure in the melting machine is more than or equal to 0.3Mpa, the temperature is more than or equal to 135 ℃, and the melting time is more than 30 min.
5. The method for the combined anaerobic digestion of the chemical residues of the livestock and poultry died of illness and the kitchen waste slurry as claimed in claim 3, wherein in said step S24, the mixed slurry is heated to 65-75 ℃.
6. The method for united anaerobic digestion of the residues from livestock and poultry chemical production and the kitchen waste slurry, which are died of diseases, according to claim 3, wherein in the step S25, the acidity of the anaerobic tank is less than 4500mg/L, and the pH ratio is less than 0.4, and the united feeding is performed.
7. The method for united anaerobic digestion of the chemical residues of livestock and poultry died of illness and kitchen waste slurry as claimed in claim 3, wherein in said step S25, the temperature of the anaerobic tank is controlled at 55 ± 0.5 ℃.
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| KR101066124B1 (en) * | 2010-10-27 | 2011-09-20 | (주)대우건설 | Dry-wet serial anaerobic digestion device and method for producing biogas from high concentrated organic waste |
| CN103350101A (en) * | 2013-07-02 | 2013-10-16 | 王德亭 | Treating method for livestock and poultry died of diseases |
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