CN115634907A - Method for manufacturing garden planting soil through synergistic treatment of building waste and household waste - Google Patents
Method for manufacturing garden planting soil through synergistic treatment of building waste and household waste Download PDFInfo
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Abstract
The invention discloses a method for making garden planting soil by building garbage and household garbage coprocessing, which comprises the following steps of (1) carrying out anaerobic treatment on kitchen garbage in the household garbage; (2) Gasifying and incinerating the combustible part in the domestic garbage or/and the building garbage; (3) Using smoke generated by gasification incineration as a heat source, and carrying out heat drying treatment on dry building residue soil to obtain primary planting soil and outlet smoke; (4) Mixing biogas residues and biogas sludge generated by anaerobic treatment of kitchen waste with primary planting soil with a certain temperature to obtain garden planting soil; (5) And (3) utilizing the outlet flue gas as a heat source for drying the initial building residue soil, drying the initial building residue soil to obtain dry building residue soil, and using the dry building residue soil as a raw material for manufacturing primary planting soil. The invention can realize the production of high-quality garden planting soil by using building residue soil and household garbage at extremely low cost.
Description
Technical Field
The invention belongs to the technical field of solid waste treatment, and particularly relates to a method for producing garden planting soil by cooperatively treating construction waste and household waste.
Background
1. Domestic garbage classification treatment technology and problems thereof
With the deep advance of municipal solid waste classification in China, the treatment and resource utilization of various types of garbage after classification become outstanding problems which are generally faced in various regions and need to be solved urgently. As the treatment of domestic garbage in China basically forms a terminal treatment pattern which is mainly incineration treatment, most organic garbage such as kitchen waste and the like after garbage classification can only be mixed with other garbage again and then enter an incineration treatment link, so that the implementation of garbage classification becomes meaningless, and the original purpose of pushing away garbage classification is seriously deviated. The basic classification method proposed in the 'implementation scheme of domestic garbage classification system' in China is to classify garbage into four types, namely harmful garbage, recoverable matters, perishable garbage and other garbage. According to the classification scheme, the problem of treatment and utilization of kitchen waste as a main component of perishable waste is a major difficulty for continuously and stably pushing the whole waste classification work.
The main process commonly adopted by domestic and foreign kitchen garbage treatment is anaerobic fermentation or aerobic composting. According to the difference of the solid content (TS) of the organic garbage, the anaerobic digestion process can be divided into a wet type (TS 6-10%), a semi-dry type (TS 10-20%) and a dry type (TS > 20%). Dry anaerobic has become the mainstream method for treating organic waste (OFMSW) in municipal solid waste. In recent years, numerous kitchen waste treatment enterprises based on dry anaerobic treatment technical routes are successively built in China, and the problem of serious insufficient kitchen waste treatment capacity after household waste classification is partially relieved. However, after the kitchen waste is subjected to dry anaerobic treatment, in addition to the generation of biogas to realize energy recovery, a large amount of anaerobic residues, i.e., biogas slurry, biogas residues and biogas sludge, are also generated. How to treat the anaerobic residues economically and effectively and utilize the anaerobic residues as resources becomes a prominent problem which must be solved by the whole garbage classification treatment system, and is also one of the main restriction factors of applying the anaerobic technology to the kitchen garbage treatment.
A great deal of research and practical application are carried out on the organic waste anaerobic treatment residues at home and abroad. Researches show that the biogas slurry, the biogas residues and the biogas sludge contain a large amount of organic matters and nutrient elements such as N, P, K and the like required by plant growth, and have application potential as organic fertilizers or soil improvement substrates. The agricultural utilization of biogas slurry and biogas residues in China has been in history for decades. However, most of the researches and applications are carried out aiming at biogas slurry and biogas residues generated by anaerobic production of agricultural organic wastes, and the researches on the lack of systems of kitchen garbage anaerobic biogas slurry and biogas residues after classification of municipal solid wastes have large disputes in the application field, particularly the ecological safety during agricultural utilization, and no corresponding application standards and specifications exist.
On the other hand, in remote counties or towns where large-scale incineration is not suitable, a small-scale mixed domestic waste direct incineration or gasification incineration disposal pattern is mostly formed. But because the scale is smaller, the heat generated by burning is difficult to generate electricity to generate economic benefit, thereby causing the waste of energy; the kitchen waste and the combustible waste are mixed together, so that the heat value of the waste is greatly reduced, and the high temperature required by waste incineration is difficult to form in the incinerator; more troublesome is that the waste gas pollutants generated by the method, particularly dioxin pollutants, are difficult to discharge up to the standard, and cause potential harm to the ecological environment and the life health. In order to control the dioxin pollution of the waste incineration flue gas, the temperature of the flue gas is generally controlled to be more than 850 ℃ and the flue gas stays for more than 2 seconds.
2. Construction waste treatment technology and problems thereof
The construction waste comprises construction demolition waste, decoration waste, engineering residue soil, construction slurry and the like. The total amount of the building garbage in China accounts for more than half of the total amount of the municipal garbage.
The treatment of building demolition garbage in China generally comprises the steps of simply sorting, recycling utilizable metals and gravels, and burning treatment links of plastics, wood, fibers and the like; the treatment of the building decoration garbage is basically in an unordered state, most urban building decoration garbage absorption places mainly adopt landfill, the resource utilization rate is low, and the building garbage which cannot be effectively contained in a designated landfill is basically dumped randomly or transported to the landfill which is operated illegally for simple treatment; the treatment of the engineering dregs and the construction slurry is basically to transport the engineering dregs and the construction slurry to a designated place (such as ocean, mountain ditch and the like) for landfill or to transport the engineering dregs and the construction slurry to a landfill which is operated illegally for simple landfill.
In recent years, a plurality of construction waste treatment enterprises are newly built in China, most of the basic process technical routes are that after the demolished waste is sorted, the utilizable metal and sand are recycled, and the plastic, wood, fiber and the like enter the household waste incineration treatment link; the decoration garbage is basically not treated or mainly buried, and particularly, a huge amount of engineering dregs and building slurry are basically not treated or are buried by external transportation. However, because of the limited landfill site, illegal landfill is often prohibited especially after the country forbids building of dregs to fill the sea.
In addition, the projects invested in the construction according to the modes have insufficient added value competitiveness of products, insufficient enterprise self-hematopoietic capability and high government financial subsidies, and the problems cannot be effectively solved, so that the construction waste treatment project is difficult to continuously operate for a long time.
3. Problems existing in garden planting soil
Along with the rapid development of urban planning construction, the landscaping construction scale of China is continuously enlarged, and the amount of required garden planting soil is gradually increased. However, since garden planting soil is generally surface soil (such as loess, etc.) produced locally, surface soil mining has been definitely prohibited as national land policy becomes stricter. In order to solve the problem of planting soil requirement puzzling garden construction, a method for adopting building residue soil subjected to high-temperature activation as garden planting soil has appeared at present. After the building residue soil, particularly the shield soil in coastal or coastal areas is activated at high temperature, the soil physical and chemical properties can not meet the requirements of garden planting, particularly the organic matter content is very low, and the soil structure is easy to harden. The complete adoption of the soil can become a hidden danger of sustainable development of landscaping.
In addition, the building residue soil (or building sludge) is activated at high temperature to be used as garden planting soil, and the activation temperature of the building residue soil (or building sludge) is required to be over 400-500 ℃. The energy required by the method is usually natural gas, so that the energy consumption is huge and the cost is high.
4. The related patent technology has the defects
According to the invention application CN202010619945.7 (publication No. CN 111887123A) of the invention, namely, the method for the combined resource utilization of urban waste mud and organic garbage and the application thereof, the invention proposes that one or more of the urban waste mud and one or more of the organic garbage are mixed and blended, the mixture is turned over and aerated, the aerobic or anaerobic fermentation technology is applied, the two are jointly fermented, and then organic and inorganic formula fertilizers are added to condition the product characteristics, so as to produce the planting substitute soil for greening garden engineering or ecological restoration engineering. However, this method has problems in that: (1) The urban waste mud and the organic garbage are mixed and prepared and are turned and piled up for aeration to be fermented in a combined mode, the occupied area is too large, the fermentation period is too long, the fermentation odor cannot be controlled, and the large-scale production is basically not feasible; (2) The urban waste mud generally has high water content, is difficult to dehydrate and activate only by heat generated by aerobic fermentation, and cannot be produced in cold weather; (3) Large-scale kitchen garbage treatment enterprises built in various places mostly adopt anaerobic fermentation technology, and the kitchen garbage is only left with biogas residues and biogas sludge rich in organic matters after anaerobic fermentation, and does not need to be further fermented after being mixed with waste sludge.
The invention with application number of CN202011172922.2 (with publication number of CN 112387763A) applies to a method for treating construction waste soil, and the construction waste soil is subjected to pre-drying, sorting, heat drying treatment and grinding in sequence to obtain the dried construction waste soil. The method can change the physical property of the building residue soil, quickly reduce the water content of the soil, change the granular structure of the soil, thoroughly kill pathogenic microorganisms and weed seeds, and can be applied as garden planting soil. But the disadvantages are: (1) the heat drying treatment has huge energy consumption; (2) The organic matter content of the building residue soil is very low, the temperature of the heat drying treatment is 400-500 ℃, the time is 15-30min, and under the treatment condition, only the organic matter is almost completely cracked, so that the organic matter content of the generated planting soil is very low; (3) The heat drying method requires that the water content of the residue soil is less than 60 percent, the drying method is to drain the water and then naturally air-dry the residue soil, but the urban waste sludge usually has high water content, and the natural air-drying is greatly influenced by the weather conditions, has long time and occupies huge area.
Thus, improvements can also be continued.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a method for manufacturing garden planting soil by cooperatively processing construction waste and household waste, which can realize high-efficiency, low-consumption and ecological utilization of energy and resources in the construction waste and the household waste to obtain high-quality garden planting soil.
The technical scheme adopted by the invention for solving the technical problems is as follows: a method for manufacturing garden planting soil by cooperatively processing construction waste and household waste is characterized by comprising the following steps: comprises the following steps
(1) Carrying out anaerobic treatment on kitchen garbage in the household garbage to generate methane, methane slag and methane mud;
(2) Carrying out gasification incineration treatment on the combustible part in the household garbage and the combustible part in the building garbage;
(3) Taking the high-temperature flue gas generated in the step (2) as a heat source, and carrying out heat drying treatment on the dry building residue soil obtained in the step (5) by adopting heat drying equipment to obtain primary planting soil and outlet flue gas;
(4) Mixing biogas residues and biogas sludge generated by anaerobic treatment of kitchen waste in the step (1) with the primary planting soil obtained in the step (3) and kept at a certain temperature to obtain garden planting soil;
(5) And (4) taking the outlet flue gas of the heat drying device obtained in the step (3) as a heat source for drying the initial building residue soil, drying the initial building residue soil to obtain dry building residue soil, and using the dry building residue soil as a raw material for preparing the primary planting soil in the step (3).
In order to control dioxin pollution of waste incineration flue gas, the temperature of the combustible part in the building waste and the household waste in the step (2) is higher than 850 ℃ and stays for more than 2s, the temperature of high-temperature flue gas generated by gasification incineration is reduced to 580-620 ℃ after air heat exchange, meanwhile, the air becomes hot air with the temperature of more than 200 ℃ after the air is subjected to heat exchange through the high-temperature flue gas, and the hot air can be used as air inlet and oxygen supplement in the gasification incineration process in the step (2). The temperature of the flue gas after air heat exchange is very suitable for dry heat activation of dry building residue soil, and the hot air can be continuously used.
In order to provide a sufficient heat source for the heat drying device, in the step (3), when the heat of the flue gas generated by gasifying and incinerating the combustible part in the step (2) is insufficient, the biogas generated by anaerobic treatment of the kitchen garbage in the step (1) can be used as a supplementary heat source.
The temperature of the flue gas at the outlet of the heat drying equipment in the step (3) is 200-300 ℃; and (4) introducing the flue gas into the initial building residue soil drying equipment in the step (5) to dry the initial building residue soil for 20-30min.
The initial building residue soil drying device can be various, and preferably, the drying device is a dryer, preferably a rotary drum dryer.
Preferably, the initial building residue soil needs to be sorted and crushed before entering the initial building residue soil drying equipment;
the water content of the primary planting soil is less than or equal to 20wt%.
In order to facilitate mixing of the primary planting soil and the biogas residue and sludge and to reduce water in the biogas residue and sludge, in the step (4), the mixing of the biogas residue and sludge generated by anaerobic treatment of the kitchen waste and the primary planting soil is specifically performed in the following manner:
installing a feeding device above the primary planting soil conveyor belt behind the outlet of the heat drying device, adding biogas residues and biogas sludge to the conveyor belt through the feeding device in proportion, and naturally mixing the primary planting soil, the biogas residues and the biogas sludge falling from the conveyor belt to obtain garden planting soil;
wherein the weight of the biogas residues and the biogas mud accounts for 5-20% of the weight of the primary planting soil;
the water contained in the biogas residue and the biogas mud is dried due to the higher temperature (about 100 ℃) of the primary planting soil.
The kitchen waste can be treated in various ways, and preferably, in the step (1), the kitchen waste is treated by dry anaerobic treatment.
The heat drying device can be various, and preferably, the heat drying device is a heat drying furnace.
Compared with the prior art, the invention has the advantages that: the construction waste and the household waste are jointly processed, through the gradient utilization of energy and the reasonable allocation of substances, the construction waste can be utilized at extremely low cost to realize the production of high-quality garden planting soil, the additional energy consumption of natural gas and the like required by the drying of the construction waste is completely avoided, the occupied area and the processing time are greatly reduced, meanwhile, the zero-cost reasonable utilization of the biogas residues and the biogas sludge after the anaerobic treatment of the kitchen waste as organic matters of the planting soil is realized, the high-efficiency, low-consumption and ecological utilization of the energy and resources in the construction waste and the household waste are realized, and therefore, an effective way of large-scale reasonable utilization is provided for generally pushing the way of the anaerobic residues of the kitchen waste to go out for garbage classification.
The details are as follows.
1. The initial building residue soil cannot be directly used for heat drying equipment treatment due to high water content, and the current common practice is to air the initial building residue soil, so that the air-drying needs larger floor area, long treatment time and larger weather influence; or drying with additional energy consumption.
The invention adopts the outlet flue gas from the heat drying device to carry out the primary drying heat source of the building residue soil, has small occupied area and short processing time, and is not influenced by weather; and the residual heat of the outlet flue gas is fully utilized, the energy utilization rate is high, and extra energy is not required to be consumed.
2. The method comprises the following steps of (1) greatly reducing the moisture of initial building residue soil after drying to obtain dry building residue soil, putting the dry building residue soil into a heat drying device for drying, specifically adopting smoke generated by gasifying and burning combustible parts in building garbage and household garbage as a heat source, wherein the heat source has higher temperature, and the dry building residue soil is subjected to heat drying to obtain primary planting soil and outlet smoke, wherein the primary planting soil is used for manufacturing garden planting soil, and the outlet smoke has residual heat and can be used for primarily drying the initial building residue soil; therefore, the energy utilization rate is high.
3. The primary planting soil is discharged from the heat drying equipment and has a certain temperature, when the primary planting soil is mixed with the biogas residues and the biogas sludge, on one hand, the heat of the primary planting soil dries the biogas residues and the biogas sludge, which is beneficial to reducing water content, changing soil aggregate structure and killing pathogenic microorganisms and weed seeds, and on the other hand, the biogas residues and the biogas sludge increase organic matter content, so that high-quality garden planting soil (high organic matter content, low water content, small soil volume weight, loose soil and high soil permeability) is finally obtained.
Drawings
Fig. 1 is a schematic diagram of steps and a system corresponding to the invention according to an embodiment of the invention.
Detailed Description
The invention is described in further detail below with reference to the following examples of the drawings.
Example 1:
referring to fig. 1, the system adopted by the method for manufacturing garden planting soil by cooperatively processing construction waste and household waste mainly comprises four subsystems, namely (1) a combustible waste gasification incineration subsystem in the construction waste and the household waste; (2) an organic garbage anaerobic treatment subsystem such as kitchen garbage and the like; (3) a building residue heat drying subsystem; and (4) a flue gas treatment subsystem.
The method for manufacturing the garden planting soil comprises the following steps:
(1) Carrying out anaerobic treatment on kitchen garbage in the household garbage to generate biogas, biogas residues and biogas sludge; preferably, the kitchen waste is treated by dry anaerobic treatment, and other anaerobic treatment modes can also be adopted.
(2) And (3) carrying out gasification incineration treatment on the combustible part in the household garbage and the combustible part in the construction garbage. The temperature of the gasification incineration treatment reaches 900 ℃ and stays for more than 2s, the temperature of high-temperature flue gas generated by the gasification incineration is reduced to 580 ℃ after air heat exchange, meanwhile, the air becomes hot air with the temperature of more than 200 ℃ after the heat exchange of the high-temperature flue gas, and the hot air can be used as air inlet and oxygen supplement for the gasification furnace in the gasification incineration process in the step (2).
(3) And (3) performing heat drying treatment on the dry building residue soil by using the flue gas generated in the step (2) as a heat source and adopting heat drying equipment to obtain primary planting soil and outlet flue gas. Before entering the heat drying equipment, the dry building residue soil needs to be sorted and crushed. Preferably, the heat drying equipment is a heat drying furnace, the water content of the primary planting soil after heat drying is less than or equal to 20wt%, and the particle size of the particles is less than or equal to 10mm. If necessary, biogas generated by anaerobic treatment of the kitchen waste in the step (1) is used as a supplementary heat source. The outlet flue gas temperature of the heat drying equipment is 300 ℃.
(4) And (3) mixing biogas residues and biogas slurry generated in the anaerobic treatment of the kitchen waste in the step (1) with the primary planting soil obtained in the step (3) and kept at a certain temperature to obtain high-quality garden planting soil.
The mixing mode is specifically as follows:
mounting a feeding device above a primary planting soil conveying belt behind an outlet of the heat drying device, adding biogas residues and biogas sludge to the upper part of the conveying belt through the feeding device in proportion, and naturally mixing the primary planting soil, the biogas residues and the biogas sludge after falling from the conveying belt to obtain garden planting soil;
wherein the weight of the biogas residues and the biogas mud accounts for 6 percent of the weight of the primary planting soil;
the water contained in the biogas residue and the biogas mud is dried because the primary planting soil has the temperature (about 200 ℃).
(5) And (4) taking the outlet flue gas of the heat drying device obtained in the step (3) as a heat source for drying the initial building residue soil, drying the initial building residue soil to obtain dry building residue soil, and using the dry building residue soil as a raw material for preparing the primary planting soil in the step (3). Specifically, the outlet flue gas is introduced into initial building residue soil drying equipment to dry the initial building residue soil for 20min. The initial building residue soil drying equipment preferably adopts a rotary drum dryer. The outlet flue gas of the initial building muck drying equipment enters a fire flue gas treatment system, and is discharged after dust removal, desulfurization, denitration and other treatment.
The production line of the system with the production capacity of 1000t/d planting soil can process 2600t/d initial building residue soil (with the water content of 70%), the required heat needs to be matched with the combustible garbage gasification treatment capacity of 50-80t/d according to different heat values of the combustible garbage, and at least 60t/d anaerobic biogas residue biogas sludge can be consumed.
The basic physicochemical properties of the obtained planting soil are shown in table 1 by adopting the high-temperature flue gas as a heat source and mixing the biogas residues and the biogas slurry and simultaneously adopting natural gas as a heat source as a contrast.
TABLE 1 basic Properties of the used residue soil and the obtained planting soil
As can be seen from Table 1, the water content of the soil (i.e., primary building residue) obtained after the heat drying treatment is greatly reduced compared with the soil (i.e., primary building residue) before the treatment; the volume weight of the soil is reduced, and the soil is looser; the soil permeability is improved, which shows that the soil permeability is improved, and the soil texture is changed from clay to loam. But the organic matter and total nitrogen of the primary planting soil are obviously reduced, which indicates that the dry-thermalization process has larger nutrient loss; the high-quality planting soil formed by the method is mixed with the biogas residues and the biogas slurry, so that the volume weight of the soil is smaller, the soil is looser, the permeability of the soil is higher, and particularly, the organic matter content and the total nitrogen content of the soil are greatly improved.
According to the regulation of 'green planting soil CJ/T340-2016', the organic matter content of the garden planting soil is 12-80g/kg, the soil permeability coefficient is more than or equal to 5mm/h, and the volume weight<1.35mg/cm 3 . As can be seen from table 1, in this embodiment, the soil obtained by heat drying the building residue soil with high-temperature flue gas and mixing the biogas residue and the biogas sludge completely meets the standard, can be used as garden planting soil, and is suitable for landscaping engineering or ecological restoration engineering.
Example 2:
the process is essentially the same as in example 1, except that: the parameters are different.
And (3) gasifying and incinerating combustible parts in the construction waste and the household waste in the step (2) at 850 ℃ and staying for 2s. The temperature of the high-temperature flue gas generated by gasification and incineration is reduced to 600 ℃ after heat exchange by air, and meanwhile, the air becomes hot air of 200 ℃ after heat exchange by the high-temperature flue gas.
In the step (3), the temperature of the flue gas at the outlet of the heat drying equipment is 200 ℃; the water content of the primary planting soil after heat drying is 20wt%.
In the step (4), the weight of the biogas residues and the biogas mud accounts for 5% of the weight of the primary planting soil.
And (5) drying the initial building residue soil by adopting second drying equipment for 30min.
Example 3:
the process is essentially the same as in example 1, except that: the parameters are different.
And (3) performing gasification incineration treatment on combustible parts in the construction waste and the household waste in the step (2) at 900 ℃ for 2s, and after air heat exchange is performed on high-temperature flue gas generated by the gasification incineration, reducing the temperature of the high-temperature flue gas to 620 ℃, and simultaneously, performing heat exchange on the air through the high-temperature flue gas to obtain hot air at 220 ℃.
In the step (3), the temperature of the flue gas at the outlet of the heat drying equipment is 230 ℃; the water content of the primary planting soil after heat drying is 18wt%.
In the step (4), the weight of the biogas residues and the biogas mud accounts for 20% of the weight of the primary planting soil.
And (5) drying the initial building residue soil by adopting drying equipment for 25min.
Claims (9)
1. A method for manufacturing garden planting soil by cooperatively processing construction waste and household waste is characterized by comprising the following steps: comprises the following steps
(1) Anaerobic treatment is carried out on kitchen garbage in the household garbage to generate methane, methane slag and methane mud;
(2) Gasifying and incinerating the combustible part in the household garbage and/or the construction garbage;
(3) Flue gas generated by gasification and incineration of combustible parts in the construction waste and the household waste is used as a heat source, and heat drying treatment is carried out on dry construction residue soil by adopting heat drying equipment to obtain primary planting soil and outlet flue gas;
(4) Mixing biogas residues and biogas sludge generated by anaerobic treatment of kitchen waste in the step (1) with the primary planting soil obtained in the step (3) and kept at a certain temperature to obtain garden planting soil;
(5) And (4) taking the outlet flue gas of the heat drying device obtained in the step (3) as a heat source for drying the initial building residue soil, drying the initial building residue soil to obtain dry building residue soil, and using the dry building residue soil as a raw material for preparing the primary planting soil in the step (3).
2. The method of claim 1, wherein: the temperature of the combustible part in the building garbage and the household garbage in the step (2) is higher than 850 ℃ and stays for more than 2s, the temperature of high-temperature flue gas generated by gasification and incineration is reduced to 580-620 ℃ after heat exchange of air, meanwhile, the air becomes hot air with the temperature of more than 200 ℃ after heat exchange of the high-temperature flue gas, and the hot air can be used as air inlet and oxygen supplement in the gasification and incineration process in the step (2).
3. The method of claim 1, wherein: in the step (3), biogas generated by anaerobic treatment of the kitchen waste in the step (1) is used as a supplementary heat source.
4. The method of claim 1, wherein: in the step (3), the temperature of the flue gas at the outlet of the heat drying equipment is 200-300 ℃;
and (5) introducing the outlet flue gas into initial building residue soil drying equipment, and drying the initial building residue soil by adopting the initial building residue soil drying equipment for 20-30min.
5. The method of claim 4, wherein: the initial building residue soil drying equipment is a dryer.
6. The method of claim 1, wherein: in the step (3), the dry building residue soil needs to be sorted and crushed before entering the heat drying equipment;
the water content of the primary planting soil is less than or equal to 20wt%.
7. The method of claim 1, wherein: in the step (4), the mode of mixing the biogas residues and the biogas mud generated by anaerobic treatment of the kitchen waste with the primary planting soil is as follows:
mounting a feeding device above the primary planting soil conveying belt behind the outlet of the heat drying device, adding biogas residues and biogas sludge to the upper part of the conveying belt through the feeding device in proportion, and naturally mixing the primary planting soil, the biogas residues and the biogas sludge falling from the conveying belt to obtain garden planting soil;
wherein the weight of the biogas residues and the biogas sludge accounts for 5-20% of the weight of the primary planting soil;
and the water contained in the biogas residue and the biogas mud is dried due to the temperature of the primary planting soil.
8. The method of claim 1, wherein: in the step (1), the kitchen waste is treated by dry anaerobic treatment.
9. The method according to any one of claims 1 to 8, wherein: the heat drying equipment is a heat drying furnace.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116441291A (en) * | 2023-06-16 | 2023-07-18 | 北京华宇辉煌生态环保科技股份有限公司 | Multi-source garbage cooperative treatment system and method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1730175A (en) * | 2005-08-01 | 2006-02-08 | 四川海诺尔环保产业投资有限公司 | Domestic refuse comprehensive treatment method |
| WO2011128513A1 (en) * | 2010-04-14 | 2011-10-20 | Preseco Oy | A waste refining method |
| CN106905077A (en) * | 2017-03-22 | 2017-06-30 | 海南瑞泽新材料研究院有限公司 | A kind of after-treatment building waste waste prepares the method for planting soil and the planting soil of acquisition |
| CN108718993A (en) * | 2018-07-13 | 2018-11-02 | 大连地拓环境科技有限公司 | A kind of boron tailing planting soil and preparation method thereof |
| CN109675906A (en) * | 2018-11-28 | 2019-04-26 | 东莞理工学院 | A kind of wholly-owned source recycling and reusing system of building castoff |
| CN112387763A (en) * | 2020-10-28 | 2021-02-23 | 宁波绿宝环保科技有限公司 | Treatment method of building residue soil |
| CN114703000A (en) * | 2021-12-30 | 2022-07-05 | 中国电建集团成都勘测设计研究院有限公司 | Oil-based rock debris and kitchen biogas residue cooperative recycling treatment method and treatment system |
-
2022
- 2022-09-26 CN CN202211177322.4A patent/CN115634907A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1730175A (en) * | 2005-08-01 | 2006-02-08 | 四川海诺尔环保产业投资有限公司 | Domestic refuse comprehensive treatment method |
| WO2011128513A1 (en) * | 2010-04-14 | 2011-10-20 | Preseco Oy | A waste refining method |
| CN106905077A (en) * | 2017-03-22 | 2017-06-30 | 海南瑞泽新材料研究院有限公司 | A kind of after-treatment building waste waste prepares the method for planting soil and the planting soil of acquisition |
| CN108718993A (en) * | 2018-07-13 | 2018-11-02 | 大连地拓环境科技有限公司 | A kind of boron tailing planting soil and preparation method thereof |
| CN109675906A (en) * | 2018-11-28 | 2019-04-26 | 东莞理工学院 | A kind of wholly-owned source recycling and reusing system of building castoff |
| CN112387763A (en) * | 2020-10-28 | 2021-02-23 | 宁波绿宝环保科技有限公司 | Treatment method of building residue soil |
| CN114703000A (en) * | 2021-12-30 | 2022-07-05 | 中国电建集团成都勘测设计研究院有限公司 | Oil-based rock debris and kitchen biogas residue cooperative recycling treatment method and treatment system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116441291A (en) * | 2023-06-16 | 2023-07-18 | 北京华宇辉煌生态环保科技股份有限公司 | Multi-source garbage cooperative treatment system and method |
| CN116441291B (en) * | 2023-06-16 | 2023-09-01 | 北京华宇辉煌生态环保科技股份有限公司 | Multi-source garbage cooperative treatment system and method |
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