CN113680798A - System and method for cooperatively treating garden garbage and kitchen garbage - Google Patents
System and method for cooperatively treating garden garbage and kitchen garbage Download PDFInfo
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- CN113680798A CN113680798A CN202110981199.0A CN202110981199A CN113680798A CN 113680798 A CN113680798 A CN 113680798A CN 202110981199 A CN202110981199 A CN 202110981199A CN 113680798 A CN113680798 A CN 113680798A
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- 239000010813 municipal solid waste Substances 0.000 title claims abstract description 97
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000002002 slurry Substances 0.000 claims abstract description 67
- 238000011081 inoculation Methods 0.000 claims abstract description 38
- 239000000463 material Substances 0.000 claims abstract description 20
- 238000010992 reflux Methods 0.000 claims abstract description 16
- 238000004064 recycling Methods 0.000 claims abstract description 5
- 239000010806 kitchen waste Substances 0.000 claims description 51
- 239000010921 garden waste Substances 0.000 claims description 30
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 20
- 238000000926 separation method Methods 0.000 claims description 16
- 108010029541 Laccase Proteins 0.000 claims description 12
- 238000000855 fermentation Methods 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000012216 screening Methods 0.000 claims description 8
- 238000007885 magnetic separation Methods 0.000 claims description 7
- 239000011268 mixed slurry Substances 0.000 claims description 7
- 238000010907 mechanical stirring Methods 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 230000004151 fermentation Effects 0.000 claims description 5
- 238000003672 processing method Methods 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 abstract description 17
- 230000001932 seasonal effect Effects 0.000 abstract description 8
- 230000015556 catabolic process Effects 0.000 abstract description 2
- 238000006731 degradation reaction Methods 0.000 abstract description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract 4
- 238000010411 cooking Methods 0.000 abstract 2
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- 238000009264 composting Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000003895 organic fertilizer Substances 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
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- 235000005911 diet Nutrition 0.000 description 1
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- 238000003912 environmental pollution Methods 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
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- 150000004665 fatty acids Chemical class 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- 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
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/20—Waste processing or separation
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a system and a method for cooperatively treating garden garbage and kitchen garbage. The invention accelerates the degradation of lignocellulose in garden garbage through a multistage mechanical crushing-acetic acid-laccase pretreatment process of the garden garbage, and simultaneously shortens anaerobic time and improves methane yield through biogas slurry reflux inoculation. According to the invention, the C/N ratio and solid content of the material are adjusted through biogas residue recycling, so that the problem of material fluctuation caused by seasonal trimming of garden garbage is effectively solved, and the stability of the system is maintained. The utility model provides a gardens rubbish and rubbish from cooking cooperative processing system realizes the resourceization in coordination of rubbish from cooking and gardens rubbish through dry-type anaerobism, improves marsh gas output, and green, high efficiency, stability effectively avoid the unstability risk that the material fluctuation brought.
Description
Technical Field
The invention belongs to the technical field of organic solid waste anaerobic fermentation, and particularly relates to a system and a method for cooperatively treating garden garbage and kitchen garbage.
Background
With the promotion of garbage classification work and the gradual increase of classification level, organic solid waste anaerobic fermentation biogas engineering examples are applied more and more, and common organic solid waste comprises: kitchen waste, garden waste, fruit and vegetable waste, livestock and poultry manure, crop straws and the like are subjected to anaerobic fermentation, so that biogas biological energy can be generated by organic solid waste, the contradiction between energy supply and demand is effectively relieved, and the energy structure is improved. Therefore, the anaerobic fermentation biogas engineering is an important way for the resource utilization of organic solid wastes.
The organic solid waste anaerobic fermentation method mainly comprises a wet anaerobic method and a dry anaerobic method. The wet anaerobic process is suitable for organic solid wastes with the solid content of 8-15%, has wide engineering application, has high requirements on pretreatment capacity, slurry quality, sand and impurity content and is sensitive to load impact. The dry anaerobic method is suitable for organic solid waste with high solid content (15-40%), has strong load impact resistance and low requirement on pretreatment of materials, but has high investment cost of dry anaerobic equipment.
Under the influence of economic level, dietary structure, garbage classification level, supporting facility construction and the like, the kitchen waste classified and transported in various regions has certain difference, but the solid content of the kitchen waste is higher by 15-35% and the C/N ratio is 15-30. Due to the high solid content characteristic of the kitchen waste, if a wet anaerobic method is adopted, a large amount of water distribution needs to be consumed to reduce the solid content, but the biogas slurry treatment amount is increased, so that the waste of water resources is caused, and therefore, the dry anaerobic method is adopted to ferment the high solid content kitchen waste. The garden garbage has the characteristics of carbon and nitrogen enrichment and high solid content (TS 40% -60%), particularly the C/N ratio of plant branches is up to 56.5, the garden garbage is usually treated by landfill, incineration, pyrolysis, composting, anaerobic fermentation and the like, the landfill and incineration method can cause environmental pollution and resource waste, the pyrolysis method is easy to generate secondary pollution, the composting method can be used for converting the garden garbage into organic fertilizer, but the problems of long complete decomposition time, poor fertilizer efficiency, limited application of the organic fertilizer and the like exist, and therefore a dry anaerobic system which can tolerate high-solid content materials can be used for treating the garden garbage.
The cooperative treatment of the kitchen waste and the garden waste can not only adjust the solid content and C/N ratio of the materials, effectively solve the problem of system instability caused by material fluctuation and volatile fatty acid accumulation, but also obviously improve the anaerobic digestion efficiency and the biogas yield. The patent numbers are: CN201810140063.5, patent name: a method for co-processing kitchen waste and green waste is characterized in that kitchen waste and green waste generated in a residential area are processed by a two-phase wet anaerobic method, but due to the high solid content of materials, water distribution with the mass ratio of 1:1-3:1 to the kitchen waste needs to be added for dilution during pulping, unnecessary water resource use and biogas slurry treatment capacity are increased, garden waste is processed by an ultrasonic and high-temperature hot-wet method, and equipment investment and operation cost are high.
Disclosure of Invention
The invention aims to provide a system and a method for cooperatively treating garden garbage and kitchen garbage, which realize cooperative recycling of the kitchen garbage and the garden garbage through dry anaerobic treatment, are green, efficient and stable, and effectively avoid instability risks caused by material fluctuation.
In order to solve the problems, the invention adopts the following scheme:
the invention discloses a system for cooperatively treating garden garbage and kitchen garbage, which comprises a pretreatment system and an anaerobic system, wherein the pretreatment system comprises a pretreatment system and a treatment system;
the pretreatment system comprises a kitchen waste pretreatment system and a garden waste pretreatment system;
the kitchen waste pretreatment system is used for sequentially carrying out crushing, magnetic separation and screening treatment on kitchen waste,
the garden garbage pretreatment is used for sequentially carrying out multistage mechanical crushing, acetic acid pretreatment and laccase joint pretreatment on garden garbage;
the anaerobic system comprises a mixed inoculation system, a dry anaerobic system and a solid-liquid separation system;
the mixed inoculation system is used for mixing the kitchen waste slurry and the garden waste slurry treated by the pretreatment system, heating the kitchen waste slurry and the garden waste slurry, and adjusting the TS range and the C/N range of the mixed slurry;
and pumping the slurry treated by the mixed inoculation system into a dry anaerobic system, fermenting the slurry, and feeding the fermented slurry into a solid-liquid separation system, wherein the solid-liquid separation system is used for separating the slurry into biogas residues and biogas slurry.
Further, the solid-liquid separation system is also used for refluxing part of biogas slurry to the mixed inoculation system. When the yield of the garden garbage raw materials is insufficient or the fluctuation is large, the solid-liquid separation system is also used for recycling the biogas residues to the mixed inoculation system.
Further, a heating device is arranged in the mixed inoculation system and used for heating the mixed slurry.
The invention discloses a garden garbage and kitchen garbage co-processing method, which comprises the following steps:
step 1, respectively collecting and transporting kitchen waste and garden waste and then feeding the kitchen waste and the garden waste into a pretreatment system, feeding the kitchen waste into the kitchen waste pretreatment system, and feeding the garden waste into the garden waste pretreatment system;
step 2, sequentially carrying out crushing, magnetic separation and screening treatment on the kitchen waste in a kitchen waste pretreatment system;
after the kitchen waste is pretreated, large plastic, paper, metal and other impurities in the kitchen waste are screened out, and the kitchen waste is crushed into slurry with the particle size less than or equal to 80 mm.
Step 3, sequentially carrying out multistage mechanical crushing, acetic acid pretreatment and laccase joint pretreatment on the garden garbage in a garden garbage pretreatment system;
the particle size of garden garbage is smaller than or equal to 80mm after multistage crushing treatment, then acetic acid with the concentration of 15% -30% is added at the temperature of 25-30 ℃, the solid-liquid ratio is adjusted to be 1:10-1:20, garden garbage is soaked for 4-24h and then is subjected to laccase pretreatment, industrial laccase is added into slurry according to the ratio of 0.01-0.5 thousandth at the temperature of 30-35 ℃, the pH is controlled to be 4.5-6.0, and the treatment is carried out for 6-48 h.
Step 4, feeding the pretreated kitchen waste and garden waste slurry into a mixing and inoculating system according to the ratio of 2:1-6:1, and fully mixing the slurry under mechanical stirring; the speed of mechanical stirring is 10-30 r/min; meanwhile, inoculating with biogas slurry, and heating the mixed slurry to 25-35 deg.C in a mixed inoculation system.
And 5, after 2-12h of mixed inoculation, pumping the slurry into a dry anaerobic system, fermenting in the dry anaerobic system for 27-30 days, and after fermentation, feeding the material into a solid-liquid separation system to be separated into biogas residues and biogas slurry.
And 6, refluxing part of the biogas slurry to the mixed inoculation system, wherein the biogas slurry reflux inoculation ratio is 30-50%, and the biogas slurry reflux interval time is 2-12 h.
Furthermore, due to the influence of seasonal pruning, the garden garbage amount generated during spring and autumn pruning is more, and the solid content of dead branches and fallen leaves is higher in autumn and winter, so that the garden garbage has seasonal fluctuation of raw material yield and properties. When the amount of garden garbage is insufficient due to seasonal pruning, part of biogas residues are recycled to the mixed inoculation system, the ratio of kitchen garbage to biogas residues is 2:1-6:1, and the biogas residues are recycled at intervals of 2-12 h.
Has the advantages that:
(1) the multistage mechanical crushing-acetic acid-laccase combined pretreatment method for garden garbage provided by the invention has the advantages that the degradation of lignocellulose in garden garbage is accelerated, the fermentation period is shortened and the biogas yield is improved through biogas slurry reflux inoculation.
(2) The system for cooperatively treating garden garbage and kitchen garbage effectively avoids the layering phenomenon of the kitchen garbage in the dry anaerobic system, adjusts the C/N ratio and solid content of raw materials, and improves the operation stability and the gas production rate of the dry anaerobic system.
(3) The invention adjusts the C/N ratio and solid content of the mixture of kitchen waste and garden waste by recycling biogas residues, and effectively solves the problem of material yield and property fluctuation of garden waste caused by seasonal pruning.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flow chart of the garden garbage and kitchen garbage co-processing system according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Embodiment 1, a system for the cooperative treatment of garden waste and kitchen waste, as shown in fig. 1, comprises a pretreatment system and an anaerobic system, wherein the pretreatment system comprises a kitchen waste pretreatment system and a garden waste pretreatment system;
the anaerobic system comprises a mixed inoculation system, a dry anaerobic system and a solid-liquid separation system.
The kitchen waste pretreatment system is used for sequentially carrying out crushing, magnetic separation and screening treatment on kitchen waste, and the particle size of the pretreated kitchen waste is less than or equal to 80 mm.
The garden garbage pretreatment system adopts a multi-stage mechanical crushing-acetic acid-laccase combined pretreatment process, garden garbage is crushed into particles with the particle size of less than or equal to 80mm by a multi-stage machine, then the particles are pretreated by acetic acid with the concentration of 15% -30%, the solid-liquid ratio is controlled to be 1:10-1:20, the garden garbage is soaked for 4-24h at the temperature of 25-30 ℃, then the garden garbage enters laccase pretreatment, industrial laccase is added into slurry according to 0.01-0.5 per mill, the pH is controlled to be 4.5-6.0, the temperature is controlled to be 30-35 ℃, and the treatment time is 6-48 h.
And (3) mixing and inoculating the pretreated kitchen waste and garden waste slurry in a mixing ratio of 2:1-6:1, adjusting the TS range of the mixed material to be 20-40%, and adjusting the C/N ratio to be 25-30. The mixed inoculation system adopts mechanical stirring to mix materials, and the stirring speed is 10-30 r/min. The mixed inoculation system is provided with a heating system, and the heating temperature is 25-35 ℃. The materials are mixed for 2 to 12 hours and then pumped into a dry anaerobic system. And refluxing part of the biogas slurry after solid-liquid separation to a mixed inoculation system, wherein the biogas slurry reflux inoculation ratio is 30-50%, and the biogas slurry reflux interval is 2-12 h.
Due to the influence of seasonal pruning, the garden garbage amount generated during the pruning in spring and autumn is more, and the solid content of dry branches and fallen leaves in autumn and winter is higher, so that the garden garbage has seasonal fluctuation of raw material yield and properties. When the amount of garden garbage is insufficient due to seasonal pruning, part of biogas residues are recycled to the mixed inoculation system, the ratio of kitchen garbage to biogas residues is 2:1-6:1, and the biogas residues are recycled at intervals of 2-12 h.
Example 2: the invention discloses a method for cooperatively treating garden garbage and kitchen garbage, which comprises the following steps:
step 1, respectively collecting and transporting kitchen waste and garden waste and then feeding the kitchen waste and the garden waste into a pretreatment system, feeding the kitchen waste into the kitchen waste pretreatment system, and feeding the garden waste into the garden waste pretreatment system;
and 2, screening out large plastic, paper, metal and other impurities in the kitchen waste through processes of crushing, magnetic separation, screening and the like, and crushing the kitchen waste into slurry with the particle size of less than or equal to 80 mm.
And 3, firstly, carrying out multistage crushing treatment on the garden garbage to obtain particles with the particle size of less than or equal to 80mm, then adding acetic acid with the concentration of 15-30% at the temperature of 25-30 ℃, adjusting the solid-liquid ratio to be 1:10-1:20, soaking the garden garbage for 4-24h, then carrying out laccase pretreatment, adding industrial laccase into the slurry according to the proportion of 0.01-0.5 per mill at the temperature of 30-35 ℃, and controlling the pH to be 4.5-6.0 for 6-48 h.
And 4, feeding the pretreated kitchen waste and garden waste slurry into a mixing and inoculating system according to the ratio of 2:1-6:1, and fully mixing the slurry under mechanical stirring at 10-30 r/min. Meanwhile, inoculating by using biogas slurry, wherein the inoculation amount of the biogas slurry is 30-50% of that of the mixed slurry, and heating the mixed slurry to 25-35 ℃ in a mixed inoculation system.
And 5, after 2-12h of mixed inoculation, pumping the slurry into a dry anaerobic system, and after 27-30d of fermentation, feeding the material into a solid-liquid separation system to be separated into biogas residues and biogas slurry.
And 6, refluxing part of the biogas slurry to the mixed inoculation system, wherein the biogas slurry reflux inoculation ratio is 30-50%, and the biogas slurry reflux interval time is 2-12 h.
Example 3: when garden garbage mainly comprises grass and leaves in summer and the yield is insufficient due to less pruning, firstly, slurry obtained by crushing, magnetic separation and screening kitchen garbage (TS is about 15 percent, and C/N ratio is about 20) is pumped into a mixed inoculation system. At the moment, the solid content of the garden garbage is low, and the yield is insufficient, so that part of biogas residues can be recycled to the mixed inoculation system to supplement the shortage of the garden garbage. The ratio of the biogas residues to the total amount of the kitchen wastes and the garden wastes is 1:5, the solid content of the materials is adjusted to be 20-30%, and the C/N is adjusted to be 25-30. Then refluxing biogas slurry for inoculation, wherein the inoculation ratio of the biogas slurry to the material is 30%. Mixing and stirring at 15r/min for 2h, heating the slurry to 30 ℃, and pumping into a dry anaerobic system. After the materials are subjected to anaerobic fermentation for about 28 days, the materials are subjected to solid-liquid separation to form biogas residues and biogas slurry, and the biogas residues and the biogas slurry are further recycled or treated to reach the discharge standard.
The present invention is not limited to the specific embodiments and applications described above, which are intended to be illustrative, instructional and not limiting. Those skilled in the art, having the benefit of this disclosure, may effect numerous modifications thereto without departing from the scope of the invention as defined by the appended claims.
Claims (10)
1. A system for the cooperative treatment of garden garbage and kitchen garbage is characterized by comprising a pretreatment system and an anaerobic system;
the pretreatment system comprises a kitchen waste pretreatment system and a garden waste pretreatment system;
the kitchen waste pretreatment system is used for sequentially carrying out crushing, magnetic separation and screening treatment on kitchen waste,
the garden garbage pretreatment is used for sequentially carrying out multistage mechanical crushing, acetic acid pretreatment and laccase joint pretreatment on garden garbage;
the anaerobic system comprises a mixed inoculation system, a dry anaerobic system and a solid-liquid separation system;
the mixed inoculation system is used for mixing the kitchen waste slurry and the garden waste slurry treated by the pretreatment system, heating the kitchen waste slurry and the garden waste slurry, and adjusting the TS range and the C/N range of the mixed slurry;
and pumping the slurry treated by the mixed inoculation system into a dry anaerobic system, fermenting the slurry, and feeding the fermented slurry into a solid-liquid separation system, wherein the solid-liquid separation system is used for separating the slurry into biogas residues and biogas slurry.
2. The system for the cooperative treatment of garden garbage and kitchen garbage according to claim 1, wherein the solid-liquid separation system is further configured to return a portion of biogas slurry to the mixed inoculation system.
3. The system for the cooperative treatment of garden garbage and kitchen garbage according to claim 1, wherein the solid-liquid separation system is further configured to recycle biogas residues to the mixed inoculation system when the garden garbage is insufficient in raw material yield or fluctuates greatly.
4. A garden garbage and kitchen garbage co-processing method is characterized by comprising the following steps:
step 1, respectively collecting and transporting kitchen waste and garden waste and then feeding the kitchen waste and the garden waste into a pretreatment system, feeding the kitchen waste into the kitchen waste pretreatment system, and feeding the garden waste into the garden waste pretreatment system;
step 2, sequentially carrying out crushing, magnetic separation and screening treatment on the kitchen waste in a kitchen waste pretreatment system;
step 3, sequentially carrying out multistage mechanical crushing, acetic acid pretreatment and laccase joint pretreatment on the garden garbage in a garden garbage pretreatment system;
step 4, feeding the pretreated kitchen waste and garden waste slurry into a mixing and inoculating system according to the ratio of 2:1-6:1, and fully mixing the slurry under mechanical stirring; simultaneously, inoculating by utilizing biogas slurry, and heating the mixed slurry to 25-35 ℃ in a mixed inoculation system;
step 5, after 2-12h of mixed inoculation, pumping the slurry into a dry anaerobic system, fermenting in the dry anaerobic system, and after fermentation, feeding the material into a solid-liquid separation system to be separated into biogas residues and biogas slurry;
and 6, refluxing part of the biogas slurry to the mixed inoculation system, wherein the biogas slurry refluxing interval time is 2-12 h.
5. The garden garbage and kitchen garbage co-processing method according to claim 4, wherein after the kitchen garbage is pre-processed in the step 2, large plastic, paper, metal and other impurities in the kitchen garbage are screened out, and the kitchen garbage is crushed into slurry with the particle size of less than or equal to 80 mm.
6. The garden garbage and kitchen garbage co-processing method according to claim 4, characterized in that in step 3, garden garbage is subjected to multistage crushing treatment, the particle size is less than or equal to 80mm, then acetic acid with the concentration of 15% -30% is added at the temperature of 25-30 ℃, the solid-to-liquid ratio is adjusted to be 1:10-1:20, the garden garbage is soaked for 4-24h and then is subjected to laccase pretreatment, industrial laccase is added into the slurry according to the proportion of 0.01-0.5 thousandth at the temperature of 30-35 ℃, the pH is controlled to be 4.5-6.0, and the garden garbage and kitchen garbage are processed for 6-48 h.
7. The method for the cooperative treatment of garden garbage and kitchen garbage according to claim 4, wherein the speed of mechanical stirring in step 4 is 10-30 r/min.
8. The method for the cooperative treatment of garden garbage and kitchen garbage according to claim 4, wherein the fermentation time in step 5 is 27-30 days.
9. The cooperative treatment method of garden garbage and kitchen garbage according to claim 4, wherein the biogas slurry reflux inoculation ratio in step 6 is 30% -50%.
10. The garden garbage and kitchen garbage co-processing method according to claim 4, further comprising the steps of: when the yield of the garden garbage raw materials is insufficient or fluctuates greatly, the biogas residues are recycled to the mixed inoculation system, the mixing ratio of the kitchen garbage to the biogas residues is 2:1-6:1, and the recycling interval of the biogas residues is 2-12 h.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110981199.0A CN113680798A (en) | 2021-08-25 | 2021-08-25 | System and method for cooperatively treating garden garbage and kitchen garbage |
| PCT/CN2022/103751 WO2023024713A1 (en) | 2021-08-25 | 2022-07-04 | System and method for cooperative treatment of garden waste and kitchen waste |
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| CN202110981199.0A CN113680798A (en) | 2021-08-25 | 2021-08-25 | System and method for cooperatively treating garden garbage and kitchen garbage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023024713A1 (en) * | 2021-08-25 | 2023-03-02 | 南京万德斯环保科技股份有限公司 | System and method for cooperative treatment of garden waste and kitchen waste |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116622482A (en) * | 2023-04-21 | 2023-08-22 | 中国联合工程有限公司 | Agriculture and forestry waste cooperative resource utilization system and working method thereof |
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