Stack pollutant purification method based on microbial flexible purification blanket

Abstract

The invention discloses a pile pollutant purification method based on a microorganism flexible purification blanket, which comprises the following steps: sewing a carrier loaded with functional microorganisms and a breathable fabric to obtain the microorganism-loaded flexible purification blanket; adding a microbial nutrient solution to the flexible purification blanket; the flexible purification blanket is laid on the surface of the pile body, and pollutants generated by the pile body are purified through the flexible purification blanket. According to the method, in-situ treatment is directly carried out at the storage yard, the flexible purification blanket with the biological purification function is innovatively provided aiming at solid waste storage yard pollutants, a nutrient solution is supplemented while a carrier loaded with microorganisms is prepared into the flexible purification blanket, and normal metabolic activity of follow-up microorganisms is ensured; finally, the three effects of removing the gas, purifying the odor in the malodorous gas and preventing dust are achieved; the flexible purification blanket is not limited by the shape and the size, and the application range is wider.

Description

Technical Field

[0001] The invention belongs to the technical field of pollutant purification, and in particular relates to a pile pollutant purification method based on a microbial flexible purification blanket. Background Art

[0002] In the process of production and life, a large number of irregularly shaped material piles are generated, including but not limited to landfills, coal yards, natural rubber yards, industrial waste slag yards, etc., and these large-volume materials will leak gas during the accumulation process. The main components of the gas include methane, mercaptan, sulfide, hydrogen sulfide and ammonia gas, etc. The volatile organic compounds, greenhouse gases, and flammable and explosive gases released by large-volume material piles will pollute the atmosphere if they are not treated, seriously affecting the quality of the surrounding atmospheric environment, and may cause safety accidents such as flash explosions in local spaces.

[0003] Traditional gas purification technologies mainly include adsorption, combustion, condensation, UV photolysis and membrane separation. Although they play an important role in the treatment of volatile pollutants, they also have problems such as small adsorption capacity of adsorbents, high requirements for low concentrations for combustion, high fuel blending ratio, high phase change energy consumption, and large consumption of catalysts and oxidants. Microorganisms have the advantages of low operating costs and synergistic removal of multiple pollutants in the purification of low-concentration, complex component gases due to their high efficiency and low carbon degradation of organic and inorganic pollutants. They have been applied and developed in many fields, mainly in the form of biofilters.

[0004] However, for the unorganized emission of atmospheric pollutants from piles with complex shapes and large open spaces, traditional gas collection devices have problems such as complicated gas collection pipelines and complex wind pressure control, making it difficult to collect atmospheric pollutants efficiently. Traditional biofilter towers / pools have problems such as high equipment and operating costs due to the complex structure of the purification device and poor process applicability to piles with complex shapes. Therefore, it is urgent to find a low-cost, environmentally friendly method for in-situ treatment and purification of solid waste landfill gas.

[0005] Patent number CN202220744564.6 discloses a biological purification device for treating harmful gases from the pile of slag in pharmaceutical factories. The harmful gases generated by the slag pile are collected and then removed through the biological filler area. The patent requires the gas to be collected as a whole and then passed into the biological purification device. The equipment is complex and cannot be treated in situ. Therefore, it is urgent to develop a method that can achieve in-situ treatment of harmful volatile gases in the pile. Summary of the invention

[0006] In order to solve the above technical problems, the purpose of the present invention is to provide a method for purifying pile pollutants based on a microbial flexible purification blanket, aiming to simplify the complexity of existing technical equipment, reduce the difficulty of treatment, and realize in-situ treatment.

[0007] The object of the present invention is achieved by comprising the following steps: S1. Sewing a carrier loaded with functional microorganisms and a breathable fabric to obtain a flexible purification blanket loaded with microorganisms; S2, adding microbial nutrient solution to the flexible purification blanket; S3. A flexible purification blanket is laid on the surface of the pile body, and pollutants generated by the pile body are purified by the flexible purification blanket.

[0008] Preferably, the carrier loaded with functional microorganisms in step S1 is one or more of corn cob particles, activated carbon, absorbent sponge, sodium alginate, and lightweight ceramsite with water absorption and moisture retention properties.

[0009] Preferably, the carrier loaded with functional microorganisms in step S1 is loaded by one or more of adhesion, adsorption and embedding.

[0010] Among them, adhesion refers to the mutual attraction and adhesion between functional microorganisms and fillers; adsorption refers to the adhesion of one or more components of the microorganisms to the surface of the filler when the functional microorganisms come into contact with the filler; encapsulation is the process of using an encapsulating agent (such as sodium alginate, agar, etc.) to wrap the functional microorganisms to be embedded and attach them to the filler.

[0011] Preferably, the functional microorganism in step S1 is a methanotrophic bacterium ( Methanotrophs )、nitrifying bacteria( Nitrifying bacteria )、sulfur oxidizing bacteria( Sulphur oxidizing bacteria ), aromatic compound degrading bacteria, aldehyde degrading bacteria or one or more thereof.

[0012] Preferably, the breathable fabric in step S1 is one or more of animal fiber fabric, plant fiber fabric, and chemical fiber fabric.

[0013] Preferably, the sewing method in step S1 is blending, interlayer or pocket.

[0014] Among them, blending is to sew the filler loaded with functional microorganisms and fabric together; interlayer is to sew the filler loaded with functional microorganisms between two layers of fabric; and pocketing is to sew multiple pockets on the fabric, and the pockets are filled with filler loaded with functional microorganisms.

[0015] Preferably, the microbial nutrient solution in step S2 contains one or more of soluble nitrogen, phosphorus, sulfur and iron; nutrients well known to those skilled in the art can be used.

[0016] Preferably, the pollutants in step S3 are one or more of methane, mercaptans, sulfides, hydrogen sulfide, ammonia, aromatic hydrocarbons and their derivatives, aldehydes, and volatile fatty acids.

[0017] Compared with the prior art, the present invention has the following technical effects: 1. The special functional microorganisms in the biological purification blanket can efficiently biodegrade volatile organic compounds at normal temperature and pressure. The pollution removal process only requires the addition of trace nutrients, no power consumption, and low operating costs; 2. Since the biological purification blanket is a flexible cover, it is not restricted by the shape of the solid waste pile and can achieve full collection and treatment of atmospheric pollutants released unorganized by complex solid waste piles; 3. The biological purification blanket maintains a certain humidity during operation, and can effectively intercept dust particles while purifying volatile pollutants; 4. The biological purification blanket can also be used in the form of curtains and door curtains to carry out multi-layer efficient blocking and purification of air pollutant transmission channels such as doors and windows. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the process of the present invention. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the accompanying drawings, but the present invention is not limited in any way. Any changes or substitutions made based on the teachings of the present invention belong to the protection scope of the present invention.

[0020] Example 1 The coal in an open-air coal yard is subjected to natural fragmentation, which continuously releases methane inside, causing greenhouse gas emissions. The method of Example 1 is implemented; the pile pollutant purification method based on the microbial flexible purification blanket of this embodiment includes the following steps: S1. Adsorbing methane-oxidizing bacteria biofilm on corn cob particles and sewing them with non-woven fabrics to obtain a flexible purification blanket loaded with methane-oxidizing bacteria. The loading capacity of functional microorganisms is 10 8 cfu / cm~10 12 cfu / cm; S2, spraying a microbial nutrient solution containing nitrogen and phosphorus onto the flexible purification blanket; S3. A flexible purification blanket is laid on the surface of the coal pile. The methane and dust generated by the pile are purified and dust-reduced by the flexible purification blanket. The methane emitted in an unorganized manner in the coal yard is biologically purified and removed.

[0021] Example 2 In a landfill, greenhouse gases and odor components such as methane, hydrogen sulfide, ammonia, mercaptans, hydrogen sulfide, and volatile fatty acids are emitted due to the fermentation of organic matter in the garbage. The method of Example 2 is implemented; the pile pollutant purification method based on the microbial flexible purification blanket of this embodiment includes the following steps: S1. Adhere methane oxidizing bacteria, sulfur oxidizing bacteria, and nitrifying bacteria to activated carbon particles and sew them with breathable nylon fabric to obtain a flexible purification blanket loaded with multiple functional microorganisms. The loading capacity of functional microorganisms is 10 7 cfu / cm~10 10 cfu / cm; S2, spraying a microbial nutrient solution containing nitrogen, phosphorus and iron onto the flexible purification blanket; S3. The flexible purification blanket is laid on the surface of the landfill. The methane and odor components produced by the landfill are biochemically degraded by the various functional microorganisms on the flexible purification blanket. The methane and greenhouse gases emitted in the landfill are biologically purified and removed.

[0022] Example 3 The slag in the closed yard of a pharmaceutical factory contains volatile organic pollutants such as hydrogen sulfide, benzene, toluene, and aldehydes. The method of Example 3 is implemented; the method of purifying pollutants in the pile based on the microbial flexible purification blanket of this embodiment includes the following steps: S1. Sulfur oxidizing bacteria and aromatic compound degrading bacteria are embedded in a sodium alginate carrier and interlayered with breathable linen to obtain a flexible purification blanket loaded with multiple functional microorganisms. The loading amount of functional microorganisms is 10 6 cfu / cm~10 8 cfu / cm; S2, spraying a microbial nutrient solution containing nitrogen, phosphorus and iron onto the flexible purification blanket; S3. The flexible purification blanket is laid on the surface of the pharmaceutical factory slag pile. The odor and aromatic volatile organic compounds generated by the pile are biochemically degraded by the various functional microorganisms of the flexible purification blanket. The odor and toxic aromatic volatile organic pollutants emitted in an unorganized manner from the pharmaceutical waste slag are biologically purified and removed.

[0023] Example 4 The sources of solid waste in a petrochemical production waste dump are complex, and various pollutants such as mercaptans, sulfides, hydrogen sulfide, ammonia, benzene, phenol, formaldehyde, acetaldehyde, and freon are continuously released into the atmospheric environment. The method of Example 4 is implemented; the method of purifying pollutants in the dump based on the microbial flexible purification blanket of this embodiment includes the following steps: S1. Sulfur oxidizing bacteria, aromatic compound degrading bacteria, and aldehyde degrading bacteria are attached to lightweight ceramsite and sewn with breathable linen cloth through a bag to obtain a flexible purification blanket loaded with multiple functional microorganisms. The loading amount of functional microorganisms is 10 4 cfu / cm~10 6 cfu / cm; S2, spraying a microbial nutrient solution containing nitrogen, phosphorus and iron onto the flexible purification blanket; S3. A flexible purification blanket is laid on the surface of the waste residue. The odor and aromatic volatile organic compounds produced by the pile are biochemically degraded by a variety of functional microorganisms on the flexible purification blanket. The odor and toxic aromatic volatile organic pollutants emitted in an unorganized manner from the pharmaceutical waste residue are biologically purified and removed.

[0024] Example 5 A natural rubber pile releases malodorous gases such as hydrogen sulfide, ammonia, mercaptan and thioether, and the method of Example 5 is implemented; the pile pollutant purification method based on the microbial flexible purification blanket of this embodiment includes the following steps: S1. Sulfur oxidizing bacteria and aromatic compound degrading bacteria are adsorbed on activated carbon fiber and water-absorbing sponge, and then blended with breathable cotton cloth to obtain a flexible purification blanket loaded with multiple functional microorganisms. The loading amount of functional microorganisms is 10 3 cfu / cm~10 5 cfu / cm; S2, spraying a microbial nutrient solution containing nitrogen, phosphorus and iron onto the flexible purification blanket; S3. The flexible purification blanket is spread on the surface of the rubber pile. The odor and aromatic volatile organic compounds generated by the pile are biochemically degraded by the various functional microorganisms of the flexible purification blanket. The volatile organic pollutants such as the odor emitted from the unorganized natural rubber warehouse are biologically purified and removed.

Claims

1. A method for purifying pollutants in a pile based on a microbial flexible purification blanket, characterized in that The following steps are involved: S1. Sewing a carrier loaded with functional microorganisms and a breathable fabric to obtain a flexible purification blanket loaded with microorganisms; S2, adding microbial nutrient solution to the flexible purification blanket; S3. A flexible purification blanket is laid on the surface of the pile body, and pollutants generated by the pile body are purified by the flexible purification blanket.

2. The method for purifying pollutants in a pile based on a microbial flexible purification blanket according to claim 1, characterized in that In step S1, the carrier loaded with functional microorganisms is one or more of corn cob particles, activated carbon, absorbent sponge, sodium alginate, and lightweight ceramsite with water absorption and moisture retention properties.

3. The method for purifying pollutants in a pile based on a microbial flexible purification blanket according to claim 1, characterized in that In step S1, the carrier loaded with functional microorganisms is loaded in one or more of the following ways: adhesion, adsorption, and embedding.

4. The method for purifying pollutants in a pile based on a microbial flexible purification blanket according to claim 1, characterized in that The functional microorganisms in step S1 are one or more of methane oxidizing bacteria, nitrifying bacteria, sulfur oxidizing bacteria, aromatic compound degrading bacteria, and aldehyde degrading bacteria.

5. The method for purifying pollutants in a pile based on a microbial flexible purification blanket according to claim 1, characterized in that In step S1, the breathable fabric is one or more of animal fiber fabric, plant fiber fabric, and chemical fiber fabric.

6. The method for purifying pollutants in a pile based on a microbial flexible purification blanket according to claim 1, characterized in that The sewing method of step S1 is blending, interlayer or pocket.

7. The method for purifying pollutants in a pile based on a microbial flexible purification blanket according to claim 1, characterized in that The loading amount of functional microorganisms in step S1 is 10 3 cfu / cm~10 12 cfu / cm.

8. The method for purifying pollutants in a pile based on a microbial flexible purification blanket according to claim 1, characterized in that In step S2, the microbial nutrient solution contains one or more of soluble nitrogen, phosphorus, sulfur and iron.

9. The method for purifying pollutants in a pile based on a microbial flexible purification blanket according to claim 1, characterized in that The pollutants in step S3 are one or more of methane, mercaptans, sulfides, hydrogen sulfide, ammonia, aromatic hydrocarbons and their derivatives, aldehydes, and volatile fatty acids.

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