A method for purifying pollutants in a pile based on a microbial flexible purification blanket

Abstract

The application discloses a kind of based on microbial flexible purification blanket's heap contaminant purification method, comprising the following steps: functional microorganism is loaded with carrier and air-permeable fabric is sewed, to the flexible purification blanket of load microorganism;Microorganism nutrient solution is added to flexible purification blanket;Flexible purification blanket is laid on the surface of heap, and the contaminant generated by heap is purified by flexible purification blanket.The application directly carries out in-situ treatment at stockyard, for solid waste stockyard contaminant, innovatively proposes flexible purification blanket with biological purification function, while supplementing nutrient solution to ensure the metabolic activity of subsequent microorganism normal, finally realizes the triple effect of removing gas, purifying odor in foul gas and dust prevention;The flexible purification blanket of the application is not limited by shape and size, and has wider adaptability.

Description

Technical Field

[0001] This invention belongs to the field of pollutant purification technology, specifically relating to a method for purifying pollutants in a pile based on a microbial flexible purification blanket. Background Technology

[0002] During production and daily life, large quantities of irregularly shaped materials are generated and stored, including but not limited to landfills, coal yards, natural rubber yards, and industrial waste dumps. These large-volume materials release gases during storage, the main components of which include methane, mercaptans, sulfides, hydrogen sulfide, and ammonia. The volatile organic compounds, greenhouse gases, and flammable and explosive gases released from these large material piles, if left untreated, will pollute the atmosphere, severely impacting the surrounding air quality and potentially causing flash explosions and other safety accidents in localized areas.

[0003] Traditional gas purification technologies mainly include adsorption, combustion, condensation, UV photolysis, and membrane separation. While these methods have played a significant role in the treatment of volatile pollutants, they also suffer from drawbacks such as small adsorption capacity of adsorbents, high requirements for low concentrations during combustion, high fuel blending ratios, high energy consumption during phase change, and significant consumption of catalysts and oxidants. Microorganisms, due to their efficient and low-carbon degradation of organic and inorganic pollutants, offer advantages such as low operating costs and synergistic removal of multiple pollutants in the purification of low-concentration, complex-component gases, leading to their widespread application in numerous fields, primarily in the form of biofilters.

[0004] However, for the fugitive emissions of air pollutants from complex-shaped piles with large open spaces, traditional gas collection devices suffer from problems such as complicated gas collection pipelines and complex wind pressure control, making it difficult to achieve efficient collection of air pollutants. Traditional biofilters / pools suffer from problems such as high equipment and operating costs due to the complex structure of the purification device, and poor process applicability to complex-shaped piles. Therefore, there is an urgent need to find a low-cost, environmentally friendly method for in-situ treatment and purification of gases from solid waste piles.

[0005] Patent CN202220744564.6 discloses a biological purification device for treating harmful gases from pharmaceutical factory residue piles. This device collects the harmful gases generated from the residue piles and then removes them through a biological packing zone. However, this patent requires the entire gas to be collected before being introduced into the biological purification device, making the equipment complex and unable to treat gases in situ. Therefore, there is an urgent need to develop a method for in-situ treatment of harmful volatile gases from stockpiles. Summary of the Invention

[0006] To address the aforementioned technical problems, the present invention aims to provide a method for purifying pollutants in a heap based on a microbial flexible purification blanket, which simplifies the complexity of existing technical equipment, reduces the difficulty of treatment, and enables in-situ treatment.

[0007] The objective of this invention is achieved by including the following steps:

[0008] S1. A flexible purification blanket loaded with microorganisms is obtained by sewing together a carrier loaded with functional microorganisms and a breathable fabric.

[0009] S2. Add microbial nutrient solution to the flexible purification blanket;

[0010] S3. Lay a flexible purification blanket on the surface of the pile, and the pollutants generated by the pile will be purified by the flexible purification blanket.

[0011] Preferably, the carrier loaded with functional microorganisms in step S1 is one or more of the following: corn cob particles, activated carbon, absorbent sponge, sodium alginate, and lightweight ceramsite, which have water-absorbing and moisturizing properties.

[0012] Preferably, the loading method of the carrier loaded with functional microorganisms in step S1 is one or more of adhesion, adsorption, and encapsulation.

[0013] Among them, adhesion refers to the mutual attraction and adhesion between functional microorganisms and packing materials; adsorption refers to the adhesion of one or more components of the microorganisms to the surface of the packing material when the functional microorganisms come into contact with the packing material; and encapsulation is the process of using encapsulating agents (such as sodium alginate, agar, etc.) to wrap the functional microorganisms to be encapsulated and attach them to the packing material.

[0014] Preferably, the functional microorganism in step S1 is a methanogenic bacterium ( Methanotrophs ), nitrifying bacteria ( Nitrifying bacteria ), sulfur-oxidizing bacteria ( Sulphur oxidizing bacteria One or more of the following: aromatic compound degrading bacteria, aldehyde degrading bacteria.

[0015] Preferably, the breathable fabric in step S1 is one or more of animal fiber fabric, plant fiber fabric, and chemical fiber fabric.

[0016] Preferably, the sewing method in step S1 is a blended fabric, a double-layered fabric, or a double-layered bag.

[0017] Among them, blended fabric is made by mixing and sewing together filler loaded with functional microorganisms; sandwich fabric is made by sewing filler loaded with functional microorganisms between two layers of fabric; and pouch fabric is made by sewing multiple pockets into the fabric, with each pocket containing filler loaded with functional microorganisms.

[0018] 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.

[0019] Preferably, the pollutants in step S3 are one or more of methane, thiols, thioethers, hydrogen sulfide, ammonia, aromatics and their derivatives, aldehydes, and volatile fatty acids.

[0020] Compared with the prior art, the present invention has the following technical effects:

[0021] 1. The specialized 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 replenishment of trace nutrients, with no power consumption and low operating costs.

[0022] 2. Because the biological purification blanket is a flexible cover, it is not limited by the shape of the solid waste pile, and can realize the complete collection and treatment of air pollutants released without organization from complex solid waste piles.

[0023] 3. The biological purification blanket maintains a certain level of humidity during operation, which can effectively intercept dust particles while purifying volatile pollutants.

[0024] 4. Biological purification blankets can also be used as curtains or door curtains to provide multi-layered and efficient blocking and purification of air pollutants in channels such as doors and windows. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the method flow of the present invention. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings, but this is not intended to limit the present invention in any way. Any modifications or substitutions made based on the teachings of the present invention shall fall within the protection scope of the present invention.

[0027] Example 1

[0028] In an open-air coal yard, coal continuously releases methane due to natural fracturing, causing greenhouse gas emissions. The method described in Example 1 is being implemented. This example uses a pollutant purification method based on a microbial flexible purification blanket, comprising the following steps:

[0029] S1. Methanogenic bacteria are attached to corn cob kernels and sewn onto non-woven fabric to obtain a flexible purification blanket loaded with methanogenic bacteria. The functional microbial loading capacity is 10. 8 cfu / cm~10 12 cfu / cm;

[0030] S2. Spray nitrogen- and phosphorus-containing microbial nutrient solution onto the flexible purification blanket;

[0031] S3. The flexible purification blanket is laid on the surface of the coal pile. The methane and dust generated by the pile are purified and reduced by the flexible purification blanket. The methane emitted from the coal pile without organization is removed by biological purification.

[0032] Example 2

[0033] A landfill emits greenhouse gases and malodorous components, including methane, hydrogen sulfide, ammonia, mercaptans, and volatile fatty acids, due to the fermentation of organic matter in the waste. The method described in Example 2 is followed. This example describes a method for purifying pollutants from a landfill using a flexible microbial purification blanket, comprising the following steps:

[0034] S1. Methanogenic bacteria, sulfur-oxidizing bacteria, and nitrifying bacteria are attached to activated carbon particles via biofilm adhesion, and then sewn onto 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;

[0035] S2. Spray a microbial nutrient solution containing nitrogen, phosphorus, and iron onto the flexible purification blanket;

[0036] 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 various functional microorganisms on the flexible purification blanket, and the methane and greenhouse gases emitted from the landfill without organization are biologically purified and removed.

[0037] Example 3

[0038] The slag heap in a closed storage yard of a pharmaceutical factory contains volatile organic pollutants such as hydrogen sulfide, benzene, toluene, and aldehydes. The method described in Example 3 is applied. This example uses a method for purifying pollutants from a stockpile based on a microbial flexible purification blanket, and includes the following steps:

[0039] S1. Sulfur-oxidizing bacteria and aromatic compound-degrading bacteria are embedded in a sodium alginate carrier and sewn together with breathable linen fabric to obtain a flexible purification blanket loaded with multiple functional microorganisms. The loading capacity of functional microorganisms is 10. 6 cfu / cm~10 8 cfu / cm;

[0040] S2. Spray a microbial nutrient solution containing nitrogen, phosphorus, and iron onto the flexible purification blanket;

[0041] S3. The flexible purification blanket is laid on the surface of the pharmaceutical waste pile. The malodor and aromatic volatile organic compounds generated by the pile are biochemically degraded by various functional microorganisms of the flexible purification blanket. The malodor and toxic aromatic volatile organic pollutants emitted by the pharmaceutical waste are biologically purified and removed.

[0042] Example 4

[0043] The solid waste in a petrochemical production waste dump has complex sources and continuously releases various pollutants into the atmosphere, including mercaptans, sulfides, hydrogen sulfide, ammonia, benzene, phenol, formaldehyde, acetaldehyde, and Freon. The method described in Example 4 is being implemented. This example uses a pollutant purification method based on a microbial flexible purification blanket, which includes the following steps:

[0044] S1. Sulfur-oxidizing bacteria, aromatic compound-degrading bacteria, and aldehyde-degrading bacteria are adhered to lightweight ceramsite, and then sewn together with breathable linen fabric through a sandwich panel to obtain a flexible purification blanket loaded with multiple functional microorganisms. The loading capacity of functional microorganisms is 10. 4 cfu / cm~10 6 cfu / cm;

[0045] S2. Spray a microbial nutrient solution containing nitrogen, phosphorus, and iron onto the flexible purification blanket;

[0046] S3. The flexible purification blanket is laid on the surface of the waste residue. The malodor and aromatic volatile organic compounds generated by the pile are biochemically degraded by various functional microorganisms of the flexible purification blanket. The malodor and toxic aromatic volatile organic pollutants emitted by the pharmaceutical waste residue are biologically purified and removed.

[0047] Example 5

[0048] A natural rubber pile releases malodorous gases such as hydrogen sulfide, ammonia, mercaptans, and sulfides. The method described in Example 5 is followed. This example uses a pile pollutant purification method based on a microbial flexible purification blanket, including the following steps:

[0049] S1. Sulfur-oxidizing bacteria and aromatic compound-degrading bacteria are adsorbed onto activated carbon fibers and absorbent sponges, then blended and sewn with breathable cotton fabric to obtain a flexible purification blanket loaded with multiple functional microorganisms. The loading capacity of functional microorganisms is 10. 3 cfu / cm~10 5 cfu / cm;

[0050] S2. Spray a microbial nutrient solution containing nitrogen, phosphorus, and iron onto the flexible purification blanket;

[0051] S3. The flexible purification blanket is laid on the surface of the rubber pile. The malodor and aromatic volatile organic compounds generated by the pile are biochemically degraded by various functional microorganisms of the flexible purification blanket. The malodor and other volatile organic pollutants emitted from the natural rubber warehouse are biologically purified and removed.

Claims

1. A method for purifying pollutants in a stockpile based on a microbial flexible purification blanket, characterized in that... Includes the following steps: S1. A carrier loaded with functional microorganisms is sewn together with a breathable fabric to obtain a flexible purification blanket loaded with microorganisms. S2. Add microbial nutrient solution to the flexible purification blanket; S3. Lay a flexible purification blanket on the surface of the pile, and the pollutants generated by the pile will be purified by the flexible purification blanket. The carrier loaded with functional microorganisms in step S1 is one or more of the following: corn cob particles with water-absorbing and moisturizing properties, activated carbon, absorbent sponge, sodium alginate, and lightweight ceramsite.

2. The method for purifying pollutants in a stockpile based on a microbial flexible purification blanket according to claim 1, characterized in that... In step S1, the loading method of the carrier loaded with functional microorganisms is one or more of adhesion, adsorption, and encapsulation.

3. The method for purifying pollutants in a stockpile 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 the following: methanogenic bacteria, nitrifying bacteria, sulfur-oxidizing bacteria, aromatic compound degrading bacteria, and aldehyde degrading bacteria.

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

5. The method for purifying pollutants in a stockpile based on a microbial flexible purification blanket according to claim 1, characterized in that... The sewing method for step S1 is blended fabric, interlayer, or pocket.

6. The method for purifying pollutants in a stockpile based on a microbial flexible purification blanket according to claim 1, characterized in that... The functional microbial load in step S1 is 10. 3 cfu / cm~10 12 cfu / cm.

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

8. The method for purifying pollutants in a stockpile based on a microbial flexible purification blanket according to claim 1, characterized in that... The pollutants in the S3 step are one or more of the following: methane, thiols, thioethers, hydrogen sulfide, ammonia, aromatics and their derivatives, aldehydes, and volatile fatty acids.

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