Resourceful treatment system and method for humus soil under household garbage sieve

Abstract

The invention discloses a household garbage undersize humus resourceful treatment system and method, and belongs to the technical field of solid waste treatment. Comprising the following steps: mounting an aeration pipeline in a bottom groove of a fermentation unit of the humus soil recycling site, and connecting the aeration pipeline with a fan system outside the fermentation unit; a broken stone hardcore and an isolating layer are sequentially arranged on the aeration pipeline of the fermentation unit; humus soil which is uniformly mixed with a high-temperature fermentation inoculant is contained on the isolation layer in the fermentation unit, and the humus soil is covered with a high-molecular intelligent film; the humus soil is subjected to automatic fermentation control, so that resourceful treatment of the humus soil is realized. According to the method, the exclusive high-temperature fermentation inoculant is added into the humus soil, and organic matters in the humus soil can be stably, efficiently and environment-friendly removed by adopting a high-molecular intelligent membrane automatic fermentation technology, so that the treated humus soil meets the engineering construction backfill soil requirements, and the tail-section treatment problem of the screened humus soil can be thoroughly solved; the method has popularization significance in the field of stock household garbage 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 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 main method of waste disposal in my country. A large number of existing landfills have been formed across the country. The existence of existing landfills affects the rapid development of cities and poses certain environmental pollution risks. With the acceleration of urbanization and the improvement of environmental protection requirements, most existing landfills need to be harmlessly treated through quality screening to completely solve environmental pollution and release land resources.

[0003] The existing garbage enters the garbage screening system after aerobic pretreatment. The main products are combustibles on the screen, humus soil under the screen and inorganic heavy aggregate. Among them, the combustibles can be sent to the nearby domestic waste incineration plant for disposal, the inorganic heavy aggregate is backfilled on site, and the main outlet for 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 humus soil under the sieve produced by the screening of existing domestic waste does not exceed the standard, mainly because the high organic matter in the humus soil limits its disposal. The way of transporting humus soil to sanitary landfills is contrary to the concept of domestic waste screening, and many cities no longer have sanitary landfills; therefore, the sanitary landfill disposal method is not only very expensive, but also very limited. Humus soil modification as a way of landscaping soil is subject to consumption limits, and many cities do not have a large demand for landscaping soil; therefore, this disposal method can only be used as an auxiliary means. If the organic matter content in the humus soil under the sieve is reduced and meets the requirements of the "Construction Foundation Engineering Construction Quality Acceptance Standard" GB50202-2018, "Soil Environmental Quality-Construction Land Soil Pollution Risk Control Standard" GB36600-2018 and other standards, it can be used for backfill soil in engineering construction, which will completely solve the problem of the outlet of the humus soil under the sieve. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a system and method for resource processing of humus soil under the sieve of domestic waste. The system adds exclusive high-temperature fermentation bacteria to the humus soil and adopts polymer intelligent membrane automatic fermentation technology to 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 backfill soil used in engineering construction is very large, which can completely solve the problem of final disposal of humus soil under the sieve. The system has strong operability and simple construction, and has promotion significance in the field of existing domestic waste disposal.

[0006] The 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, 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; a crushed stone cushion layer and an isolation layer are sequentially arranged on the aeration pipe of the fermentation unit;

[0008] The isolation layer in the fermentation unit contains humus soil uniformly mixed with a high-temperature fermentation bacterial 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 to 15 meters, the width is 5 to 10 meters, and the height of the three walls is 1.5 to 2.5 meters.

[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 a geofilter is wrapped around the outside of the flower pipe; 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 crushed stone cushion layer is 20 to 40 cm, and the crushed stone 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 (2-5):(1-2):(1-2), the bacterial species mainly include Bacillus subtilis, yeast and Trichoderma, and the proportions of 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 live bacteria 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 of quality classification and screening of the stock of domestic garbage, and the organic matter content of the humus soil is 10% to 40%;

[0014] The diluted high-temperature fermentation bacteria agent is sprayed evenly into the humus soil. The addition amount of the high-temperature fermentation bacteria agent is 0.05-0.2 kg / 1 ton of humus soil. The humidity of the humus soil after mixing is 45%-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 polymer smart membrane has a thickness of 1.6 to 2.0 mm and is composed 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 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 under-screen humus soil 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, stirring and filling of 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 sieved humus soil. 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 application range as backfill soil; compared with the disposal method of humus soil for landscaping, the amount of humus soil consumed after fermentation is very large, and the amount of backfill soil is much larger than the amount of soil 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 is compounded by bacteria + enzyme + microbial metabolites, which can accelerate the degradation of organic matter in the humus.

[0030] 3. The present invention adopts polymer intelligent membrane automatic fermentation technology. The polymer intelligent membrane covering can significantly shorten the fermentation cycle of humus soil and improve the degradation efficiency of organic matter in humus soil. This is due to the precise regulation of the microbial growth environment by the polymer intelligent membrane, making the fermentation process more stable and controllable.

[0031] 4. The present invention adopts polymer intelligent membrane automatic fermentation technology. The polymer intelligent membrane material can effectively block the odor emission during the fermentation process and block the infiltration of external rainwater, reducing environmental pollution during the fermentation process. At the same time, the high temperature fermentation environment can also kill pathogenic microorganisms, ensuring the harmlessness level of the fermented humus soil.

[0032] 5. The present invention adopts polymer intelligent membrane automatic fermentation technology, and adopts intelligent control and automatic fermentation operation management, which 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, and 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 film, 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 promotion significance in the field of existing domestic waste disposal. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of the system for resource processing of under-screen humus soil of domestic waste 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 screening of domestic waste.

[0038] In the figure:

[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] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the 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 creative work are within the scope of protection of the present invention.

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

[0042] like Figure 1 As shown, the present invention provides a system for recycling humus soil under the screen of domestic waste, 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 to 15 meters, the width is 5 to 10 meters, and the height of the three walls is 1.5 to 2.5 meters.

[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 1.0Mpa, 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 fan and an intelligent control system for controlling the operation of the fan. The fan adopts a centrifugal fan with an air volume of 10-100 Nm 3 / h.

[0045] In the present invention, a crushed stone cushion layer 40 and an isolation layer 50 are sequentially laid in the fermentation unit. 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 high-temperature fermentation bacteria 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 bacteria include 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 bacteria range from 40% to 60%, 10% to 20%, 25% to 40%, and 5% to 10%, and the effective live bacteria count of the high-temperature fermentation bacteria is not less than 8 billion cfu / g. Humus soil is the product of quality screening of existing domestic waste, generally refers to the undersize material falling from a single-stage drum screen or a multi-stage drum screen; the organic matter content of humus soil is high, generally 10% to 40%, and the high organic matter content makes humus soil unable to be used as backfill soil; for this reason, the diluted high-temperature fermentation bacteria agent is evenly sprayed into the humus soil, and the addition amount of the high-temperature fermentation bacteria agent is 0.05 to 0.2 kg / 1 ton of humus soil, and 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 for 1 to 2 days, and the aeration air volume is 10 to 100 Nm 3 / h, the humus 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, and three sides of the polymer smart membrane are anchored on the wall 11 of the fermentation unit, and one side is anchored on the feeding platform 12 of the fermentation unit. After the polymer smart membrane is anchored, the airtightness of the entire system should be ensured. The polymer smart membrane is a waterproof and breathable material with high efficiency filtration and selective permeability. Its thickness is 1.6-2.0mm and it consists of a three-layer structure: the surface layer is a textile fabric with a polyester fiber structure, with a thickness of 0.5mm and anti-aging effect; the middle layer is a polytetrafluoroethylene polymer smart membrane with a thickness of 0.6-1.0mm, which has the function of blocking rainwater and passing air; the inner layer is a textile fabric with a polyester fiber structure, with a thickness of 0.5mm, which has the function of resisting acid and alkali corrosion and isolating odor.

[0048] like Figures 1 to 3 As shown, the present invention provides a method for resource processing of under-screen humus soil of domestic garbage, 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 site 10. The structure of the humus soil resource 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, through which the humus soil is loaded and unloaded. The volume of the fermentation unit is 100-200m 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 / m 2 The geotextile filter layer is used to transport air to the top humus materials; 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 10-100Nm 3 / h; the air volume of the fan, the operating time and interval time of 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, which is used to evenly distribute the air sprayed from the aeration pipe to the bottom of each fermentation unit, and then diffuse it into the humus soil to be fermented above; wherein the thickness of the gravel cushion layer is 20-40 cm, and the gravel particle size is 20-60 mm;

[0058] An isolation layer 50 is laid on the top of the gravel cushion layer, and the isolation layer is used to isolate the gravel cushion layer from the humus soil; wherein 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 200g / m 2 Non-woven geotextile.

[0059] Step 4, mixing, stirring and filling of 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, spray the diluted high-temperature fermentation agent evenly 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 to squeeze it into a ball without dripping water and loosen it when it is loosened). Then, a loader is used 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%. 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 feeding 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 and consists of a three-layer structure: the surface layer is a textile fabric with a polyester fiber structure, which is 0.5 mm thick and has anti-aging effects; the middle layer is a polytetrafluoroethylene polymer smart membrane with a thickness of 0.6 to 1.0 mm, which has the functions of blocking rainwater and allowing air to pass through; the inner layer is a textile fabric with a polyester fiber structure, which is 0.5 mm thick and has the functions 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, and the aeration air volume is 10 to 100 Nm 3 / h, the humus 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 fence 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 requirements for backfill soil, loaders will be used to unload the soil and load it onto trucks 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 soil 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 of housing construction, municipal and road and bridge projects. The amount of backfilling in various cities is very large, and it can quickly absorb the humus soil under the screen produced by the screening of existing garbage.

[0075] Embodiment 1:

[0076] A method for resource processing of humus soil under screen of domestic garbage, comprising:

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

[0078] (2) 45 fermentation units are planned, each with a length of 10m and a width of 5m, covering an area of ​​50m 2 , volume 100m 3 、The total area of ​​the resource disposal site is 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, and a 10cm wide steel structure track is embedded on the top of the wall.

[0080] (4) Four grooves are arranged on the bottom plate of each fermentation unit in the resource utilization site. The groove size is 10 cm × 10 cm, and the groove spacing is 1 m. DN63 HDPE aeration flower tubes are installed in the grooves. The flower tube hole diameter is 5 mm, the hole spacing is 5 cm, 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 recovery site. The fan is a centrifugal fan with a 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 recovery site and spread evenly to form a gravel cushion layer.

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

[0084] (8) Compound a dedicated high-temperature fermentation agent, which consists of 3 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 50%:15%:30%:5%, and an effective number of live bacteria of 10 billion cfu / g. (9) Dilute the dedicated 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 while spraying. The amount of dedicated high-temperature fermentation agent added to each fermentation unit is 7.5 kg, and the humidity of the humus material after mixing is controlled at 50%.

[0085] (10) The amount of humus produced on the first day is 300m 3 The mixed and stirred humus soil is piled into the three fermentation units respectively by 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 fence 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 was performed on the three fermentation units. In the initial stage, aeration was performed three times a day, once every eight hours, and each aeration period was controlled to one hour. In the later stage, aeration was performed twice a day, once every 12 hours, and each aeration period was controlled to 30 minutes.

[0088] (13) The humus soil produced on the second day repeats steps (8) to (12). On the second day, the humus soil is again piled into 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 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 amount of humus produced by a 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 total area of ​​the resource disposal site is 4000m 2 .

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

[0097] (4) Compound exclusive high-temperature fermentation bacterial 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 amount of humus produced by a 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 total area of ​​the resource disposal site is 5000m 2 .

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

[0105] (4) Compound exclusive high-temperature fermentation bacterial 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 performed on each fermentation unit. In the initial stage, aeration is performed 4 times a day, once every 6 hours, and each aeration time is controlled to 30 minutes; in the later stage, aeration is performed 3 times a day, once every 8 hours, and each aeration time is controlled to 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 amount of humus produced by a project is 750 tons / day (500m 3 / day), the initial content of organic matter in humus soil is 40%, and the degradation target of organic matter in 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 total area of ​​the resource disposal site is 5500m 2 .

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

[0114] (4) Compound exclusive high-temperature fermentation bacterial agents, which are composed 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 performed on each fermentation unit. In the initial stage, aeration is performed 6 times a day, once every 4 hours, and each aeration time is controlled to 20 minutes; in the middle stage, aeration is performed 4 times a day, once every 6 hours, and each aeration time is controlled to 15 minutes; in the later stage, aeration is performed 3 times a day, once every 8 hours, and each aeration time is controlled to 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 only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope 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, 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; a crushed stone cushion layer and an isolation layer are sequentially arranged on the aeration pipe of the fermentation unit; The isolation layer in the fermentation unit contains humus soil uniformly mixed with a high-temperature fermentation bacterial 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.

2. The system for recycling humus soil from household garbage 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 to 15 meters, the width is 5 to 10 meters, and the height of the three walls is 1.5 to 2.5 meters.

3. The system for recycling humus soil from household garbage as claimed in claim 1, characterized in that: The aeration pipeline is a HDPE perforated flower pipe with a porosity of 5% to 20%. The outer side of the flower pipe is wrapped with a geofilter anti-filtration layer. The fan system includes a fan and an intelligent control system for controlling the operation of the fan. The fan is a centrifugal fan.

4. The system for recycling humus soil from household garbage as claimed in claim 1, characterized in that: The thickness of the crushed stone cushion layer is 20 to 40 cm, and the particle size of the crushed stone is 20 to 60 mm; the isolation layer 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, and the upper and lower sides of the three-rib structure exhaust net are wrapped with non-woven geotextile.

5. The system for recycling humus soil from household garbage as claimed in claim 1, characterized in that: 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 range from 40% to 60%, 10% to 20%, and 25% to 40%, and the effective live bacteria count of the high-temperature fermentation agent is not less than 8 billion cfu / g.

6. The system for recycling humus soil from household garbage as claimed in claim 1 or 5, characterized in that: Humus soil is the product of the separation and screening of the existing domestic waste. The organic matter content of humus soil is 10% to 40%; The diluted high-temperature fermentation bacteria agent is sprayed evenly into the humus soil. The addition amount of the high-temperature fermentation bacteria agent is 0.05-0.2 kg / 1 ton of humus soil. The humidity of the humus soil after mixing is 45%-60%.

7. 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.

8. The system for recycling humus soil from household garbage as claimed in claim 1, characterized in that: The polymer smart membrane has a thickness of 1.6-2.0 mm and is composed of a three-layer structure: a surface layer is a textile fabric with a polyester fiber structure, a middle layer is a polytetrafluoroethylene polymer smart membrane, and an inner layer is a textile fabric with a polyester fiber structure.

9. The system for recycling humus soil from household garbage as claimed in claim 1, characterized in that: 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 temperature in the fermentation unit is controlled at 50-70°C, and the fermentation time is 15-30 days.

10. A method for recycling undersize humus soil of domestic waste based on the system for recycling undersize humus soil of domestic waste as claimed in any one of claims 1 to 9, 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, stirring and filling of humus soil; Step 5, covering the polymer smart 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.

Images