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CN-122010647-A - High-value utilization and synergistic carbon fixation method for household garbage incinerator slag

CN122010647ACN 122010647 ACN122010647 ACN 122010647ACN-122010647-A

Abstract

The invention relates to the technical field of resource recycling, in particular to a high-value utilization and synergistic carbon fixation method of household garbage incineration slag, which comprises the following raw materials, by mass, 20-30 parts of household garbage incineration slag, 15-25 parts of carbonized straws, 25-30 parts of decomposed organic fertilizer, 5-8 parts of bentonite, 2-3 parts of humate and 0.1-0.5 part of microbial composite microbial inoculant. The invention applies the household garbage incinerator slag to the raw materials of the soil conditioner, and after being compounded with other raw materials, the invention generates obvious synergistic effect, not only achieves the aims of treating soil with waste and fixing carbon and reducing emission, but also effectively relieves the occupation pressure of the slag landfill on land resources and promotes the secondary recycling of wastes.

Inventors

  • ZENG HUAIYU
  • ZHAO MENG

Assignees

  • 桂林市环境卫生管理处

Dates

Publication Date
20260512
Application Date
20260212

Claims (10)

  1. 1. The high-value utilization method of the household garbage incinerator slag is characterized by comprising the steps of applying the household garbage incinerator slag to a soil conditioner; The soil conditioner comprises the following raw materials in parts by mass: 20-30 parts of household garbage incinerator slag, 15-25 parts of carbonized straws, 25-30 parts of decomposed organic fertilizer, 5-8 parts of bentonite, 2-3 parts of humate and 0.1-0.5 part of microbial composite microbial agent.
  2. 2. The method for high-value utilization of household garbage incineration slag according to claim 1, wherein the household garbage incineration slag comprises, by mass, 20% -45% of silicon dioxide, 10% -30% of calcium oxide, 5% -15% of aluminum oxide, 1% -8% of sodium chloride, 1% -5% of potassium oxide, 1% -2% of magnesium oxide, 0.5% -2% of phosphorus-containing oxide and 0.3% -1.5% of sulfur-containing oxide; the grain diameter of the household garbage incinerator slag is 2-5mm.
  3. 3. The method for high-value utilization of household garbage incinerator slag according to claim 1, wherein the carbonized straw comprises at least one of rice straw, wheat straw and corn straw.
  4. 4. The method for high-value utilization of household garbage incinerator slag according to claim 1 or 3, wherein the method for preparing carbonized straws comprises the following steps: The straw is pyrolyzed for 1 to 2 hours at the temperature of 400 to 600 ℃ to obtain carbonized straw.
  5. 5. The method for high-value utilization of household garbage incinerator slag according to claim 1, wherein the decomposed organic fertilizer comprises at least one of decomposed chicken manure, decomposed cow manure and decomposed sheep manure.
  6. 6. The method for high-value utilization of household garbage incinerator slag according to claim 1, wherein the bentonite is sodium bentonite, and the montmorillonite content in the sodium bentonite is 85% -90%.
  7. 7. The method for high-value utilization of household garbage incinerator slag according to claim 1, wherein the humate comprises potassium humate and sodium humate, and the mass ratio of the potassium humate to the sodium humate is 1:0.5-2.
  8. 8. The method for high-value utilization of household garbage incinerator slag according to claim 1, wherein the microbial composite inoculant comprises bacillus subtilis, trichoderma and saccharomycetes; The mass ratio of the bacillus subtilis to the trichoderma to the saccharomycetes is 3-5:2-3:1.
  9. 9. The method for high-value utilization of household garbage incineration slag according to claim 8, wherein the viable count of bacillus subtilis is more than or equal to 2.0X10 9 CFU/g, the viable count of trichoderma is more than or equal to 1.0X10 9 CFU/g, and the viable count of saccharomycetes is more than or equal to 1.0X10 9 CFU/g.
  10. 10. A method for fixing carbon in soil, which is characterized in that the raw materials of the soil conditioner used in the high-value utilization method of the household garbage incinerator slag according to any one of claims 1-9 are mixed according to parts by weight and granulated to obtain the soil conditioner; the soil conditioner is applied to a cultivation layer of 10-20cm of soil with the dosage of 300-800 kg per mu.

Description

High-value utilization and synergistic carbon fixation method for household garbage incinerator slag Technical Field The invention belongs to the technical field of resource recycling, and particularly relates to a high-value utilization and synergistic carbon fixation method of household garbage incinerator slag. Background The household garbage incinerator slag is a byproduct of household garbage incineration, comprises the residue on the fire grate and the particles falling from the fire grate, and has the advantages of rough surface and higher porosity. The treated components mainly comprise substances such as silicon, calcium, aluminum, potassium and the like, the chemical components are relatively stable, and the components are all beneficial mineral components required by soil, so that a material basis is provided for the resource utilization of the components. At present, the disposal mode of household garbage incineration slag at home and abroad is mainly landfill and stacking, and only a small amount of slag is used in the low added value fields such as road base backfill and the like. However, the landfill and stacking of a large amount of slag not only occupies precious land resources, but also causes the waste of beneficial mineral resources contained in the slag, and cannot realize the high-value utilization of the slag, which is contrary to the concept of recycling and harmless environmental management. If the household garbage incinerator slag is applied to the preparation of the soil conditioner, the advantages of the self beneficial mineral components are fully exerted, the land resource occupation pressure caused by slag landfill can be effectively relieved, the secondary recycling of wastes is realized, the outstanding problems of soil hardening, poor air permeability, insufficient fertility and the like can be pertinently improved, and the double benefits of waste treatment with waste and resource circulation are achieved. Disclosure of Invention The invention aims to provide a high-value utilization and synergistic carbon fixation method of household garbage incinerator slag, which solves the problems of soil hardening, poor air permeability, insufficient fertility and the like, and simultaneously achieves the aim of secondary utilization of the household garbage incinerator slag. In order to achieve the above object, the present invention provides a method for the high-value utilization of household garbage incinerator slag, comprising the steps of applying the household garbage incinerator slag to a soil conditioner; The soil conditioner comprises the following raw materials in parts by mass: 20-30 parts of household garbage incinerator slag, 15-25 parts of carbonized straws, 25-30 parts of decomposed organic fertilizer, 5-8 parts of bentonite, 2-3 parts of humate and 0.1-0.5 part of microbial composite microbial agent. In the invention, the soil conditioner preferably comprises the following raw materials in parts by mass: 22-28 parts of household garbage incinerator slag, 18-22 parts of carbonized straws, 26-29 parts of decomposed organic fertilizer, 6-7 parts of bentonite, 2.5 parts of humate and 0.2-0.4 part of microbial composite microbial agent. In the invention, the household garbage incinerator slag comprises, by mass, 20% -45% of silicon dioxide, 10% -30% of calcium oxide, 5% -15% of aluminum oxide, 1% -8% of sodium chloride, 1% -5% of potassium oxide, 1% -2% of magnesium oxide, 0.5% -2% of phosphorus-containing oxide and 0.3% -1.5% of sulfur-containing oxide, wherein the phosphorus-containing oxide and the sulfur-containing oxide are unavoidable impurities, and the particle size of the household garbage incinerator slag is preferably 2-5mm. In the invention, the leaching amount of harmful substances (aluminum, nickel, cadmium, chromium, arsenic, mercury and cyanide) of the household garbage incinerator slag meets the safety concentration limit standard value of GB5085.3-2007 'hazardous waste identification standard leaching toxicity sign', and the dioxin content meets the requirements of GB16889-2008 'household garbage landfill pollution control standard'. In the invention, the straw in the carbonization treatment preferably comprises at least one of rice straw, wheat straw and corn straw. The preparation method of the carbonized straw comprises the step of pyrolyzing the straw at 400-600 ℃ for 1-2 hours to obtain the carbonized straw. In the present invention, the decomposed organic fertilizer preferably includes at least one of decomposed chicken manure, decomposed cow manure, and decomposed sheep manure. In the present invention, the method for decomposing the decomposed organic fertilizer is well known to those skilled in the art, and is not limited herein. In the present invention, the bentonite is preferably sodium bentonite, and the montmorillonite content in the sodium bentonite is preferably 85% -90%. In the invention, the humate comprises potassium humate and sodi