System and method for resource processing of humus soil under screen of domestic garbage

Abstract

The present invention discloses a system and method for resource processing of humus soil under the screen of domestic waste, belonging to the field of solid waste treatment technology; the system comprises: installing an aeration pipe in the bottom groove of the fermentation unit of the humus soil resource processing site, the aeration pipe being connected to the fan system outside the fermentation unit; the aeration pipe of the fermentation unit is provided with a gravel cushion layer and an isolation layer in sequence; the isolation layer in the fermentation unit is filled with humus soil that has been evenly mixed with a high-temperature fermentation agent, and the humus soil is covered with a polymer intelligent membrane; the humus soil is automatically fermented and controlled to achieve resource processing of the humus soil. The present invention can remove organic matter from the humus soil in a stable, efficient and environmentally friendly manner by adding a dedicated high-temperature fermentation agent to the humus soil and using polymer intelligent membrane automatic fermentation technology, so that the treated humus soil meets the requirements of backfill soil for engineering construction, can completely solve the problem of the final disposal of humus soil under the screen, and has promotion significance in the field of existing domestic waste disposal.

Description

Technical Field

[0001] The present invention relates to the technical field of solid waste treatment, and in particular to a system and method for resource processing of humus soil under the screening of domestic waste, so as to realize resource utilization of humus soil after screening of existing domestic waste, especially humus soil with high organic matter content. Background Art

[0002] Landfill is the primary method of waste disposal in my country, resulting in a large number of existing landfills across the country. This existing landfill hinders rapid urban development and poses a risk of environmental pollution. With the acceleration of urbanization and increasing environmental protection requirements, most existing landfills require harmless treatment through quality separation and screening to completely resolve environmental pollution and free up land resources.

[0003] The existing garbage enters the garbage screening system after aerobic pretreatment. The main products are combustible materials on the screen, humus soil under the screen and inorganic heavy aggregate. Among them, the combustible materials can be sent to the nearby domestic waste incineration plant for disposal, the inorganic heavy aggregate is backfilled on site, and the main outlet of the humus soil under the screen is to be transported to a sanitary landfill for disposal or modified as soil for landscaping.

[0004] The heavy metal content in the undersize humus soil generated by the screening of existing municipal solid waste does not exceed standards. It is primarily the high organic matter content in the humus soil that limits its disposal options. Transporting humus soil to sanitary landfills contradicts the concept of municipal solid waste screening, and many cities no longer have sanitary landfills. Therefore, sanitary landfill disposal is not only very expensive but also very limited. Humus soil modification as a landscaping soil is subject to consumption limits, and many cities do not have large-scale landscaping soil demand; therefore, this disposal method can only be used as a supplementary measure. Reducing the organic matter content of the undersize humus soil to meet the requirements of standards such as the "Construction Quality Acceptance Standard for Building Foundation Engineering" (GB50202-2018) and the "Soil Environmental Quality - Construction Land Soil Pollution Risk Control Standard" (GB36600-2018), and using it as backfill for construction projects, would completely resolve the disposal problem of the undersize humus soil. Summary of the Invention

[0005] In response to the deficiencies in the prior art, the present invention provides a system and method for resource processing of humus soil under the screen of domestic waste. By adding exclusive high-temperature fermentation bacteria to the humus soil and adopting polymer intelligent membrane automatic fermentation technology, the system can stably, efficiently and environmentally friendly remove organic matter in the humus soil, so that the treated humus soil meets the requirements of backfill soil for engineering construction. The amount of engineering backfill soil used is very large, which can completely solve the problem of the final disposal of the humus soil under the screen. It has strong operability and simple construction, and has promotional significance in the field of existing domestic waste disposal.

[0006] The present invention also discloses a system for processing under-screen humus soil of domestic garbage for resource utilization, comprising: a humus soil resource utilization site;

[0007] The humus soil resource utilization site includes at least one fermentation unit, and an aeration pipe is installed in the bottom groove of each fermentation unit, and the aeration pipe is connected to the fan system outside the fermentation unit; the aeration pipe of the fermentation unit is sequentially provided with a gravel cushion layer and an isolation layer;

[0008] The isolation layer in the fermentation unit contains humus soil uniformly mixed with a high-temperature fermentation agent, and the humus soil is covered with a polymer intelligent film. The humus soil is automatically fermented and controlled to achieve resource processing of the humus soil.

[0009] As a further improvement of the present invention, the fermentation unit is provided with walls on three sides and a loading platform on one side; the volume of the fermentation unit is 100-200m 3 The length is 10-15m, the width is 5-10m, and the height of the three walls is 1.5-2.5m.

[0010] As a further improvement of the present invention, the aeration pipe is a HDPE perforated flower pipe with a porosity of 5% to 20%, and the outside of the flower pipe is wrapped with a geofilter layer; the fan system includes a fan and an intelligent control system for controlling the operation of the fan, and the fan is a centrifugal fan.

[0011] As a further improvement of the present invention, the thickness of the gravel cushion layer is 20 to 40 cm, and the gravel particle size is 20 to 60 mm; the isolation layer adopts a geocomposite exhaust net with a thickness of 6 to 8 mm, and the middle layer of the geocomposite exhaust net is a three-rib structure exhaust net made of HDPE material, and the upper and lower sides of the three-rib structure exhaust net are wrapped with non-woven geotextile.

[0012] As a further improvement of the present invention, the high-temperature fermentation agent includes bacterial species, composite functional enzymes and microbial metabolites, and the added weight proportions of the bacterial species, composite functional enzymes and microbial metabolites are (2 to 5): (1 to 2): (1 to 2), the bacterial species mainly include Bacillus subtilis, yeast and Trichoderma, and the proportions of the Bacillus subtilis, yeast, Trichoderma and other bacterial agents range from 40% to 60%, 10% to 20%, 25% to 40%, and 5% to 10%, and the effective viable count of the high-temperature fermentation agent is not less than 8 billion cfu / g.

[0013] As a further improvement of the present invention, the humus soil is a product obtained by separation and screening of existing domestic waste, and the organic matter content of the humus soil is 10% to 40%;

[0014] The diluted high-temperature fermentation agent is evenly sprayed into the humus soil. The addition amount of the high-temperature fermentation agent is 0.05 to 0.2 kg per ton of humus soil. The humidity of the humus soil after mixing is 45% to 60%.

[0015] As a further improvement of the present invention, the polymer smart membrane is covered on the humus soil, and three sides of the polymer smart membrane are anchored on the wall of the fermentation unit and one side is anchored on the loading platform of the fermentation unit.

[0016] As a further improvement of the present invention, the thickness of the polymer smart membrane is 1.6 to 2.0 mm, and it consists of a three-layer structure: the surface layer is a textile fabric with a polyester fiber structure, the middle layer is a polytetrafluoroethylene polymer smart membrane, and the inner layer is a textile fabric with a polyester fiber structure.

[0017] As a further improvement of the present invention, the automatic fermentation control parameters are: intermittent micro-aeration: aeration is performed regularly for 1 to 2 days, and the aeration air volume is 10 to 100 Nm 3 / h, the humus soil temperature in the fermentation unit is controlled at 50-70°C, and the fermentation time is 15-30 days.

[0018] The present invention also discloses a method for resource processing of humus soil under the screen of domestic garbage, comprising:

[0019] Step 1: Construction of humus soil resource utilization site;

[0020] Step 2: Install aeration pipes and fan system;

[0021] Step 3: Install the gravel cushion and isolation layer;

[0022] Step 4: mixing and filling humus soil;

[0023] Step 5: Covering the polymer smart membrane system;

[0024] Step 6: Intelligent control and automatic fermentation;

[0025] Step 7: lift the film and discharge the material;

[0026] Step 8: Utilize humus soil as a resource.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The present invention can completely solve the problem of the final outlet of the humus soil under the screen. Compared with the sanitary landfill disposal method of humus soil, the fermented humus soil does not need to enter the sanitary landfill, will not occupy a large amount of storage capacity of the landfill, and has a very wide range of applications as backfill soil; compared with the disposal method of humus soil for landscaping, the amount of humus soil after fermentation is very large, and the amount of backfill soil is far greater than the amount of soil used for landscaping.

[0029] 2. The present invention adopts polymer intelligent membrane automatic fermentation technology and adds exclusive high-temperature fermentation bacteria to the humus material. The bacteria agent is composed of bacteria + enzyme + microbial metabolites, which can accelerate the degradation of organic matter in the humus.

[0030] 3. This invention utilizes polymer smart membrane automated fermentation technology. This membrane significantly shortens the fermentation cycle of humus soil and improves the degradation efficiency of organic matter within the soil. This is due to the polymer smart membrane's precise regulation of the microbial growth environment, making the fermentation process more stable and controllable.

[0031] 4. This invention utilizes polymer intelligent membrane automated fermentation technology. The polymer intelligent membrane material effectively blocks odor emissions during the fermentation process and prevents rainwater infiltration, reducing environmental pollution during the fermentation process. Furthermore, the high-temperature fermentation environment kills pathogenic microorganisms, ensuring the harmlessness of the fermented humus soil.

[0032] 5. The present invention adopts polymer intelligent membrane automatic fermentation technology, adopts intelligent control and automatic fermentation operation management, solves the inefficiency of traditional manual operation of turning materials, can greatly improve production efficiency, and adopts intelligent control, which is conducive to large-scale production.

[0033] 6. The main reason why the humus soil under the sieve of existing domestic waste cannot be effectively utilized is that the organic matter content is too high. The humus soil treated by polymer intelligent membrane fermentation technology can be converted into backfill soil for engineering, realizing the recycling of resources. It can be widely and extensively used in housing construction, municipal and road and bridge projects.

[0034] In summary, the present invention has strong operability and simple construction. Under the coverage of the polymer intelligent membrane, the degradation process of organic matter in humus soil is stable, efficient and environmentally friendly, which solves the problem that high-organic humus soil cannot be used as backfill soil. It has promotional significance in the field of existing domestic waste disposal. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic structural diagram of the system for recycling humus soil from household garbage disclosed in the present invention;

[0036] Figure 2 for Figure 1 Schematic diagram of the structure of the medium-polymer smart membrane;

[0037] Figure 3 The present invention discloses a flow chart of a method for resource processing of humus soil under the screening of domestic waste.

[0038] In the picture:

[0039] 10. Humus soil resource utilization site; 11. Fence; 12. Loading platform; 20. Aeration pipe; 30. Fan system; 40. Gravel cushion layer; 50. Isolation layer; 60. Polymer smart membrane; 61. Textile fabric with polyester fiber structure; 62. Polytetrafluoroethylene polymer smart membrane. DETAILED DESCRIPTION

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0041] The present invention is described in further detail below with reference to the accompanying drawings:

[0042] like Figure 1 As shown, the present invention provides a system for recycling humus soil from undersize household garbage, comprising: a humus soil recycling site 10; wherein,

[0043] The humus soil resource utilization site 10 of the present invention includes at least one fermentation unit. The humus soil resource utilization site is a reinforced concrete structure. The fermentation unit is provided with a wall 11 on three sides and a loading platform 12 on one side. The loading and unloading of humus soil is achieved through the loading platform 12. The volume of the fermentation unit is 100-200m 3 The length is 10-15m, the width is 5-10m, and the height of the three walls is 1.5-2.5m.

[0044] The present invention installs an aeration pipe 20 in the bottom groove of each fermentation unit, and the aeration pipe 20 is connected to the fan system 30 outside the fermentation unit; wherein the aeration pipe is a HDPE perforated flower pipe, the pressure is 1.0 MPa, the flower pipe opening rate is 5% to 20%, and the outer side of the flower pipe is wrapped with 200g / m 2 The fan system includes a centrifugal fan and an intelligent control system for controlling the operation of the fan. The fan has an air volume of 10 to 100 Nm 3 / h.

[0045] The present invention lays a crushed stone cushion layer 40 and an isolation layer 50 in the fermentation unit in sequence. The crushed stone cushion layer 40 has a thickness of 20 to 40 cm and a crushed stone particle size of 20 to 60 mm. The isolation layer 50 adopts a geocomposite exhaust net with a thickness of 6 to 8 mm. The middle layer of the geocomposite exhaust net is a three-rib structure exhaust net made of HDPE material. The upper and lower sides of the three-rib structure exhaust net are wrapped with 200 g / m 2 Non-woven geotextile.

[0046] In the present invention, humus uniformly mixed with a high-temperature fermentation agent is placed on an isolation layer 50 in a fermentation unit, and a polymer intelligent film 60 is covered on the humus; the humus is automatically fermented and controlled to achieve resource processing of the humus; wherein the high-temperature fermentation agent includes bacterial strains, composite functional enzymes and microbial metabolites, and the added weight proportions of the bacterial strains, composite functional enzymes and microbial metabolites are (2-5):(1-2):(1-2), and the bacterial strains mainly include Bacillus subtilis, yeast and Trichoderma, and the proportions of the Bacillus subtilis, yeast, Trichoderma and other bacterial agents range from 40% to 60%, 10% to 20%, 25% to 40% and 5% to 10%, respectively; the effective viable count of the high-temperature fermentation agent is not less than 8 billion cfu / g. Humus soil is the product of the separation and screening of existing domestic waste, generally referring to the undersize material falling from a single-stage drum screen or a multi-stage drum screen. Humus soil has a high organic matter content, generally 10% to 40%. The high organic matter content makes humus soil unusable as backfill soil. To this end, the diluted high-temperature fermentation agent is evenly sprayed into the humus soil. The addition amount of high-temperature fermentation agent is 0.05 to 0.2 kg per ton of humus soil. The humidity of the humus soil after mixing is 45% to 60%. The automatic fermentation control parameters are: intermittent micro-aeration: aeration is performed regularly every 1 to 2 days, and the aeration air volume is 10 to 100 Nm 3 / h, the humus soil temperature in the fermentation unit is controlled at 50-70°C, and the fermentation time is 15-30 days.

[0047] like Figure 2 As shown, the polymer smart membrane 60 of the present invention is covered on the humus soil. Three sides of the polymer smart membrane are anchored to the fermentation unit's wall 11, and one side is anchored to the fermentation unit's loading platform 12. Once anchored, the polymer smart membrane ensures the airtightness of the entire system. The polymer smart membrane is a waterproof, breathable material with high-efficiency filtration and selective permeability. It has a thickness of 1.6 to 2.0 mm and consists of three layers: a 0.5 mm thick, anti-aging polyester fiber fabric surface layer; a 0.6 to 1.0 mm thick polytetrafluoroethylene polymer smart membrane middle layer, which blocks rainwater and allows air to pass through; and a 0.5 mm thick inner layer, a polyester fiber fabric with acid and alkali corrosion resistance and odor isolation.

[0048] like Figures 1 to 3 As shown, the present invention provides a method for resource processing of humus soil under the screen of domestic waste, comprising:

[0049] Step 1: Construction of humus soil resource utilization site;

[0050] Specifically include:

[0051] A site of suitable area is selected to construct a humus soil resource utilization site 10. The structure of the humus soil resource utilization site is a reinforced concrete structure. The thickness of the site bottom layer is not less than 25 cm. The site area is calculated based on the amount of humus soil to be processed. Each site consists of multiple fermentation units. The bottom of the fermentation unit is provided with multiple parallel 10 cm × 10 cm grooves for laying aeration pipes 20. The fermentation unit is provided with walls 11 on three sides and a loading platform 12 on one side. The loading and unloading of humus soil is achieved through the loading platform. The volume of the fermentation unit is 100 to 200 m 3 The length is 10-15m, the width is 5-10m, the height of the three walls is 1.5-2.5m, the thickness of the wall is not less than 15cm, and a steel structure track is set on the top of the wall to fix the polymer smart membrane.

[0052] Step 2: Install aeration pipes and fan system;

[0053] Specifically include:

[0054] An aeration pipe 20 is installed in the bottom groove of each fermentation unit. The aeration pipe is a HDPE perforated flower pipe with a pipe diameter of DN63-90mm, a flower pipe opening rate of 5% to 20%, a hole diameter of 5 to 10mm, a hole spacing of 5 to 10cm, and a 200g / m2 outer coating. 2 The geofilter is used to transport air to the top of the humus soil material; the fan system 30 includes a fan and an intelligent control system for controlling the operation of the fan. The fan adopts a centrifugal fan with an air volume of 10 to 100 Nm 3 / h; the air volume of the fan, the operating time and interval time of the interval aeration are controlled by the intelligent control system to deliver air to the fermentation unit.

[0055] Step 3: Install the gravel cushion and isolation layer;

[0056] Specifically include:

[0057] Gravel is laid at the bottom of each fermentation unit to form a gravel cushion layer 40. The gravel cushion layer is used to evenly distribute the air ejected from the aeration pipe to the bottom of each fermentation unit and then diffuse it into the humus soil to be fermented above. The gravel cushion layer has a thickness of 20 to 40 cm and a crushed stone particle size of 20 to 60 mm.

[0058] An isolation layer 50 is laid on the top of the gravel cushion layer to isolate the gravel cushion layer from the humus soil. The isolation layer is made of a geocomposite exhaust net with a thickness of 6 to 8 mm. The middle layer of the geocomposite exhaust net is a three-rib structure exhaust net made of HDPE. The upper and lower sides of the three-rib structure exhaust net are wrapped with 200g / m 2 Non-woven geotextile.

[0059] Step 4: mixing and filling humus soil;

[0060] Specifically include:

[0061] First, dilute the high-temperature fermentation agent with water at a ratio of 1: (5-15) and activate it for more than 30 minutes; during the mixing and stirring period, evenly spray the diluted high-temperature fermentation agent into the humus soil. The addition amount of the exclusive high-temperature fermentation agent is 0.05-0.2 kg / 1 ton of humus soil. The optimal humidity of the mixed humus soil is 45%-60% (it is best if it can be squeezed into a ball without dripping water and falls apart when loosened). Then, use a loader to evenly spread the mixed humus soil into the fermentation unit; wherein,

[0062] The high-temperature fermentation agent includes bacterial species, composite functional enzymes and microbial metabolites, and the added weight proportions of the bacterial species, composite functional enzymes and microbial metabolites are (2-5):(1-2):(1-2), the bacterial species mainly include Bacillus subtilis, yeast and Trichoderma, and the proportions of the Bacillus subtilis, yeast, Trichoderma and other bacterial agents range from 40% to 60%, 10% to 20%, 25% to 40% and 5% to 10%, and the effective viable count of the high-temperature fermentation agent is not less than 8 billion cfu / g, such as the effective viable count of the high-temperature fermentation agent is 10 billion cfu / g.

[0063] Step 5: Covering the polymer smart membrane system;

[0064] Specifically include:

[0065] The polymer smart membrane is covered on the humus soil. Three sides of the polymer smart membrane are anchored on the wall of the fermentation unit and one side is anchored on the loading platform of the fermentation unit. After the polymer smart membrane is anchored, the airtightness of the entire system should be ensured.

[0066] The polymer smart membrane is a waterproof and breathable material with a thickness of 1.6 to 2.0 mm. It consists of a three-layer structure: the surface layer is a polyester fiber structure textile fabric with a thickness of 0.5 mm and anti-aging properties; the middle layer is a polytetrafluoroethylene polymer smart membrane with a thickness of 0.6 to 1.0 mm, which has the function of blocking rainwater and allowing air to pass through; the inner layer is a polyester fiber structure textile fabric with a thickness of 0.5 mm, which has the function of resisting acid and alkali corrosion and isolating odors.

[0067] Step 6: Intelligent control and automatic fermentation; wherein,

[0068] Automatic fermentation control parameters are: intermittent micro-aeration: aeration is performed regularly every 1 to 2 days, with an aeration air volume of 10 to 100 Nm 3 / h, the humus soil temperature in the fermentation unit is controlled at 50-70°C, and the fermentation time is 15-30 days.

[0069] Step 7: lift the film and discharge the material;

[0070] Specifically include:

[0071] The polymer intelligent membrane system automatically retracts along the track at the top of the wall to measure the organic matter content of the fermented humus soil at a frequency of 3 points / 100m 3 If there are other utilization requirements for humus soil, relevant monitoring content will be added. When the organic matter content of humus soil meets the backfill soil requirements, a loader will be used to discharge the material and load it onto a truck for transportation to the soil utilization point.

[0072] Step 8: Utilization of humus soil as a resource;

[0073] Specifically include:

[0074] The resource utilization of humus soil after fermentation is mainly to use it for backfill after the organic matter content in the humus soil is reduced and meets certain standards and specifications. According to the "Construction Quality Acceptance Standard for Building Foundation Engineering" GB50202-2018, when the organic matter content of humus soil is ≤5%, humus soil can be used for backfilling in housing construction, municipal and road and bridge projects. The amount of backfill used in various cities is very large, and it can quickly absorb the undersize humus soil produced by the screening of existing garbage.

[0075] Example 1:

[0076] A method for resource processing of humus soil underscreen from domestic waste, comprising:

[0077] (1) The production of undersize humus soil in a certain project is 450 tons / day (300m 3 / day), the initial content of organic matter in the humus soil is 15%, and the degradation target of organic matter in the humus soil is 5%.

[0078] (2) Plan 45 fermentation units, each with a length of 10m and a width of 5m, covering an area of ​​50m 2 , volume 100m 3 、The resource disposal site covers a total area of ​​3000m 2 .

[0079] (3) The bottom of the resource utilization site is a 25cm C25 reinforced concrete structure. The three walls of each fermentation unit are 15cm C25 reinforced concrete structures. A 10cm wide steel structure track is embedded in the top of the wall.

[0080] (4) Each fermentation unit bottom plate of the resource utilization site is arranged with 4 grooves, the groove size is 10cm×10cm, the groove spacing is 1m, and DN63 HDPE aeration flower tubes are installed in the grooves. The flower tube aperture is 5mm, the hole spacing is 5cm, and 4 holes are arranged in each section. The outer side of the flower tube is wrapped with 200g / m 2 Geotextile filter; the HDPE pipe is a floral pipe inside the fermentation unit and a solid pipe outside the fermentation unit.

[0081] (5) A fan is arranged outside each fermentation unit in the resource utilization site. The fan is a centrifugal fan with a fan frequency of 3.5KW and an air volume of 15Nm 3 / h, the fan outlet is connected to the DN200 HDPE solid pipe by flange, and the DN200 HDPE solid pipe is hot-melt welded to four DN63 HDPE solid pipes.

[0082] (6) 20 cm of gravel with a particle size of 20 to 60 mm is laid at the bottom of each fermentation unit in the resource utilization site and spread evenly to form a gravel cushion layer.

[0083] (7) Lay a layer of 6mm thick geocomposite exhaust net on the top of the gravel cushion. The exhaust net has a three-rib structure and is wrapped with 200g / m2 on the upper and lower sides. 2 Non-woven geotextile, using binding method.

[0084] (8) Compound a proprietary high-temperature fermentation agent, consisting of 3 parts bacterial strains, 1 part enzyme, and 1 part microbial metabolite. The bacterial strains are mainly composed of Bacillus subtilis, yeast, Trichoderma, and other agents, with a ratio of 50%:15%:30%:5%, and an effective viable bacterial count of 10 billion cfu / g. (9) Dilute the proprietary high-temperature fermentation agent with water at a ratio of 1:10, activate for 30 minutes, and evenly spray the diluted agent on the humus material under the sieve, mixing and stirring the material while spraying. The amount of proprietary high-temperature fermentation agent added to each fermentation unit is 7.5 kg, and the humidity of the mixed humus material is controlled at 50%.

[0085] (10) The amount of humus produced under the sieve on the first day is 300m 3 The mixed and stirred humus soil is piled into the three fermentation units respectively using a loader.

[0086] (11) The polymer smart membrane is covered on the humus material of the three fermentation units. Three sides of the smart membrane are anchored on the steel structure track of the wall and one side is anchored on the loading platform. After the smart membrane is anchored, the airtightness of the entire system should be ensured.

[0087] (12) Intermittent micro-aeration operation was carried out on the three fermentation units. In the initial stage, aeration was carried out three times a day, once every eight hours, and each aeration was controlled within one hour; in the later stage, aeration was carried out twice a day, once every twelve hours, and each aeration was controlled within 30 minutes.

[0088] (13) The humus soil under the sieve produced on the second day repeats steps (8) to (12). On the second day, the humus soil is again piled up in three fermentation units and enters the operation stage.

[0089] (14) Under the coverage of the polymer intelligent membrane system, each fermentation unit was operated for 15 days. During this period, the temperature inside the fermentation unit was regularly observed and controlled at around 50 °C.

[0090] (15) After the operation of each fermentation unit is completed, the polymer intelligent membrane system is opened and three sampling points of the fermentation unit are sampled for organic matter testing. If the organic matter content is ≤5%, it meets the design requirements.

[0091] (16) Use a loader to transport the humus soil that has reached the fermentation standard to the soil use site of the engineering project, and repeat steps (8) to (15) for the vacated fermentation unit until all the humus soil is processed.

[0092] Example 2:

[0093] (1) The production of undersize humus soil in a certain project is 450 tons / day (300m 3 / day), the initial content of organic matter in the humus soil is 25%, and the degradation target of organic matter in the humus soil is 5%.

[0094] Based on Example 1, adjust the following parameters and processes:

[0095] (2) Use 3 fermentation units per day, plan 60 fermentation units, and the volume of each fermentation unit is 100m 3 、The resource disposal site covers a total area of ​​4000m 2 .

[0096] (3) There is one fan outside each fermentation unit in the resource utilization site, with a fan frequency of 4.0Kw and an air volume of 20Nm 3 / h.

[0097] (4) Compound exclusive high-temperature fermentation agents, which consist of 4 parts of bacterial strains, 1 part of enzyme, and 1 part of microbial metabolites. The bacterial strains are mainly composed of Bacillus subtilis, yeast, Trichoderma and other bacterial agents, with a ratio of 55%:15%:25%:5%.

[0098] (5) Dilute the exclusive high-temperature fermentation agent with water at a ratio of 1:10 and activate it for 30 minutes. The amount of exclusive high-temperature fermentation agent added to each fermentation unit is 11.25 kg.

[0099] (6) Under the coverage of the polymer intelligent membrane system, each fermentation unit was operated for 20 days. During this period, the temperature inside the fermentation unit was regularly observed and controlled at around 50°C.

[0100] Example 3:

[0101] (1) The production of undersize humus soil in a certain project is 450 tons / day (300m 3 / day), the initial content of organic matter in the humus soil is 30%, and the degradation target of organic matter in the humus soil is 5%.

[0102] Based on Example 1, adjust the following parameters and processes:

[0103] (2) Two fermentation units are used every day, and 50 fermentation units are planned. Each fermentation unit is 15m long and 5m wide, covering an area of ​​75m 2 , each fermentation unit volume 150m 3 、The resource disposal site covers a total area of ​​5000m 2 .

[0104] (3) There is one fan outside each fermentation unit in the resource utilization site, with a fan frequency of 5.5Kw and an air volume of 30Nm 3 / h.

[0105] (4) Compound exclusive high-temperature fermentation agents, which consist of 4 parts of bacterial strains, 1 part of enzyme, and 1 part of microbial metabolites. The bacterial strains are mainly composed of Bacillus subtilis, yeast, Trichoderma and other bacterial agents, with a ratio of 55%:10%:30%:5%.

[0106] (5) Dilute the exclusive high-temperature fermentation agent with water at a ratio of 1:10 and activate it for 30 minutes. The amount of exclusive high-temperature fermentation agent added to each fermentation unit is 11.25 kg.

[0107] (6) Intermittent micro-aeration operation is carried out for each fermentation unit. In the initial stage, aeration is carried out 4 times a day, once every 6 hours, and each aeration is controlled within 30 minutes; in the later stage, aeration is carried out 3 times a day, once every 8 hours, and each aeration is controlled within 20 minutes.

[0108] (7) Under the coverage of the polymer intelligent membrane system, each fermentation unit was operated for 25 days. During this period, the temperature inside the fermentation unit was regularly observed and controlled at around 50°C.

[0109] Example 4:

[0110] (1) The production of undersize humus soil in a certain project is 750 tons / day (500m 3 / day), the initial content of organic matter in the humus soil is 40%, and the degradation target of organic matter in the humus soil is 5%.

[0111] Based on Example 1, adjust the following parameters and processes:

[0112] (2) Five fermentation units are used every day, and 75 fermentation units are planned, with a volume of 100m 3 、The resource disposal site covers a total area of ​​5500m 2 .

[0113] (3) There is one fan outside each fermentation unit in the resource utilization site, with a fan frequency of 7.5Kw and an air volume of 50Nm 3 / h.

[0114] (4) Compound exclusive high-temperature fermentation agents, which consist of 4 parts of bacterial strains, 2 parts of enzymes, and 1 part of microbial metabolites. The bacterial strains are mainly composed of Bacillus subtilis, yeast, Trichoderma and other bacterial agents, with a ratio of 60%:10%:25%:5%.

[0115] (5) Dilute the exclusive high-temperature fermentation agent with water at a ratio of 1:10 and activate it for 30 minutes. The amount of exclusive high-temperature fermentation agent added to each fermentation unit is 15 kg.

[0116] (6) Intermittent micro-aeration operation is carried out for each fermentation unit. In the initial stage, aeration is carried out 6 times a day, once every 4 hours, and each aeration is controlled within 20 minutes; in the middle stage, aeration is carried out 4 times a day, once every 6 hours, and each aeration is controlled within 15 minutes; in the later stage, aeration is carried out 3 times a day, once every 8 hours, and each aeration is controlled within 10 minutes.

[0117] (7) Under the coverage of the polymer intelligent membrane system, each fermentation unit was operated for 25 days. During this period, the temperature inside the fermentation unit was regularly observed and controlled at around 50°C.

[0118] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A system for recycling humus soil from household garbage, characterized in that: include: Humus soil resource utilization site; The humus soil resource utilization site includes at least one fermentation unit, and an aeration pipe is installed in the bottom groove of each fermentation unit, and the aeration pipe is connected to the fan system outside the fermentation unit; the aeration pipe of the fermentation unit is provided with a gravel cushion layer and an isolation layer in sequence; wherein the aeration pipe is an HDPE perforated floral pipe with an opening rate of 5% to 20%, and the outer side of the floral pipe is wrapped with a geofilter filter layer; the fan system includes a fan and an intelligent control system for controlling the operation of the fan, and the fan is a centrifugal fan; the thickness of the gravel cushion layer is 20 to 40 cm, and the crushed stone particle size is 20 to 60 mm; the isolation layer is a geocomposite exhaust net with a thickness of 6 to 8 mm, the middle layer of the geocomposite exhaust net is a three-rib structure exhaust net made of HDPE material, and the upper and lower sides of the three-rib structure exhaust net are wrapped with non-woven geotextile; The isolation layer in the fermentation unit is filled with humus soil that has been evenly mixed with a high-temperature fermentation agent, and the humus soil is covered with a polymer intelligent film; the humus soil is automatically fermented and controlled to achieve resource processing of the humus soil; wherein the high-temperature fermentation agent includes bacterial species, composite functional enzymes and microbial metabolites, and the weight ratio of the bacterial species, composite functional enzymes and microbial metabolites is (2-5): (1-2): (1-2), the bacterial species mainly include Bacillus subtilis, yeast and Trichoderma, and the proportions of Bacillus subtilis, yeast and Trichoderma are in the range of 40%-60%, 10%-20% and 25%-40%, and the effective viable bacteria count of the high-temperature fermentation agent is 20%. Not less than 8 billion cfu / g; humus soil is the product of quality screening of existing domestic waste, and the organic matter content of humus soil is 10% to 40%; the diluted high-temperature fermentation agent is evenly sprayed into the humus soil, and the addition amount of the high-temperature fermentation agent is 0.05 to 0.2 kg per ton of humus soil, and the humidity of the humus soil after mixing is 45% to 60%; the thickness of the polymer smart membrane is 1.6 to 2.0 mm, and it consists of a three-layer structure: the surface layer is a textile fabric with a polyester fiber structure, the middle layer is a polytetrafluoroethylene polymer smart membrane, and the inner layer is a textile fabric with a polyester fiber structure; the automatic fermentation control parameters are: intermittent micro-aeration: aeration is performed regularly for 1 to 2 days, and the aeration air volume is 10 to 100 Nm 3 / h, the humus soil temperature in the fermentation unit is controlled at 50-70°C, and the fermentation time is 15-30 days.

2. The system for recycling humus soil from household waste as claimed in claim 1, characterized in that: The fermentation unit has walls on three sides and a loading platform on one side; the volume of the fermentation unit is 100-200m 3 The length is 10-15m, the width is 5-10m, and the height of the three walls is 1.5-2.5m.

3. The system for recycling humus soil from household garbage as claimed in claim 2, characterized in that: The polymer smart membrane is covered on the humus soil, and three sides of the polymer smart membrane are anchored on the wall of the fermentation unit, and one side is anchored on the loading platform of the fermentation unit.

4. A method for recycling undersize humus soil of domestic waste based on the system for recycling undersize humus soil of domestic waste according to any one of claims 1 to 3, characterized in that: include: Step 1: Construction of humus soil resource utilization site; Step 2: Install aeration pipes and fan system; Step 3: Install the gravel cushion and isolation layer; Step 4: mixing and filling humus soil; Step 5: Covering the polymer intelligent membrane system; Step 6: Intelligent control and automatic fermentation; Step 7: lift the film and discharge the material; Step 8: Utilize humus soil as a resource.

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