JP-2026075103-A - Circular system for organic waste

Abstract

[Problem] The present invention aims to provide a circular system that can realize horizontal recycling and upgrade recycling of organic waste. [Solution] The present invention provides a circular system for organic waste, comprising a gasification treatment facility that thermally decomposes organic waste to synthesize a gas containing CO2 , CO, and H2 , and a microbial culture facility that cultivates microorganisms capable of converting the gas into a modified compound, wherein the modified compound produced by the microorganisms in the microbial culture facility is used as a monomer raw material or polymer. [Selection Diagram] Figure 1

Inventors

• 米山 史紀
• 間瀬 昭雄
• 今井 俊輔
• 西岡 鉄馬
• 飯尾 真治

Assignees

• 住友理工株式会社

Dates

Publication Date

20260507

Application Date

20260213

Claims (14)

1. A gasification treatment facility that thermally decomposes organic waste to synthesize gases containing CO₂ , CO, and H₂ , The facility comprises a microbial culture apparatus for cultivating microorganisms capable of converting the aforementioned gas into a reformed compound, The modified compounds produced by microorganisms in the aforementioned microbial culture facility are used as monomer raw materials or polymers. A circular system for organic waste.
2. The system according to claim 1, wherein the organic waste is general waste, industrial waste, shredder dust, biomass, sludge, marine plastics, microplastics, construction waste, disaster waste, or textiles/clothing.
3. The system according to claim 1 or 2, wherein the organic matter content of the organic waste immediately before it is fed into the gasification treatment facility is 50% or more by weight.
4. The system according to claim 1 or 2, wherein the organic waste includes a rubber-based composite material.
5. Furthermore, it is equipped with crushing equipment for crushing organic waste, In the aforementioned crushing equipment, the organic matter content of the organic waste is adjusted. The system according to claim 1 or 2.
6. The system according to claim 1 or 2, wherein the thermal decomposition is carried out under temperature conditions of 800°C or higher.
7. The system according to claim 1 or 2, wherein the microorganism is a microorganism capable of utilizing any of CO2 , CO, and H2 in the gas.
8. The system according to claim 1 or 2, wherein the microorganism further comprises an enzyme capable of polymerizing its products using monomer raw materials.
9. The system according to claim 1 or 2, wherein the modified compound is an isoprene-based compound.
10. The modified compound is a monomer raw material. The facility further includes polymerization equipment for polymerizing monomer raw materials, The polymerization equipment produces polymers by (co)polymerizing monomer raw materials containing modified compounds. The system according to claim 1 or 2.
11. The monomer raw material is an isoprene-based compound. The system according to claim 10, wherein the polymer is a polyisoprene-based (co)polymer.
12. The system according to claim 1 or 2, further comprising a heat recovery facility for recovering and utilizing steam generated from a gasification treatment facility, wherein at least a portion of the recovered steam is used as a heat source, including for temperature control of a microbial culture apparatus.
13. The heat recovery equipment has a steam turbine and a generator. The heat recovery equipment is capable of taking in at least a portion of the steam generated from the gasification treatment equipment. The thermal energy of the steam causes the steam turbine to rotate, which in turn drives the generator. The system according to claim 12.
14. The system according to claim 1 or 2, further comprising a wastewater recovery system that transfers at least a portion of the wastewater from a microbial culture facility to a gasification treatment facility.

Description

This invention relates to a circular system for organic waste. So-called recycling systems have been developed that include a process for thermally decomposing waste materials such as used tires. For example, Patent Document 1 describes a method of efficiently regenerating rubber in a short time with a quality close to that of unprocessed rubber by applying optimal heat and pressure to cut only the cross-linking points while extruding rubber waste material with a twin-screw mechanism. Patent Document 2 describes obtaining monomers such as methanol from C1 gas derived from biomass using microorganisms. Japanese Patent Application Publication No. 9-227724Patent No. 734805 Figure 1 is a schematic diagram showing an overview of the system according to the first embodiment of the present invention.Figure 2 is a schematic diagram showing an overview of the system according to the second embodiment of the present invention.Figure 3 is a schematic diagram showing an overview of the system according to the third embodiment of the present invention.Figure 4 is a schematic diagram showing an overview of the system according to the fourth embodiment of the present invention.Figure 5 is a schematic diagram showing an overview of the system according to the fifth embodiment of the present invention.Figure 6 is a schematic diagram showing an overview of the system according to the sixth embodiment of the present invention.Figure 7 is a schematic diagram showing an overview of the system according to the seventh embodiment of the present invention. The embodiments of this disclosure will be described in detail below with reference to the drawings. However, the embodiments described below are not the limiting factors of this disclosure. [1. System Overview] The circular system of the present invention comprises a gasification treatment facility and a microbial culture facility, and preferably further comprises one or more selected from the group consisting of a crushing facility, a polymerization facility, a steam recovery facility, and a wastewater recovery facility. This enables the recycling and reuse of organic waste. [Organic waste] In this specification, organic waste refers to any waste containing organic matter (hydrocarbons), and may be industrial waste, general waste, or waste collected from recycling facilities of factories or local governments. Examples include soft, putrefyable organic waste such as waste plastics, waste rubber (natural rubber, synthetic rubber), waste paper, and shredder dust (automotive, discarded home appliances), putrefyable waste such as biomass (e.g., driftwood washed ashore due to disasters, food waste, waste paper, black liquor, organic sludge (sewage sludge, etc.), livestock manure, human waste sludge, construction waste wood, sawmill residues, etc.), and mixtures thereof. Organic waste preferably includes rubber-based materials or rubber-based composite materials such as tires, automobile hoses, rubber sheets, vibration-damping rubber, and breaker cords, and more preferably rubber-based composite materials. Because it is a rubber-based material or rubber-based composite material, it can be used as a substitute raw material for natural rubber, which can lead to improvements in working conditions in rubber production areas and environmental protection through the development of new farmland and a reduction in deforestation. Organic waste only needs to contain organic components, preferably containing 50% or more by weight of organic components. Organic waste is usually liquid or solid, preferably solid. In the case of solid organic waste, for processing efficiency, it is preferable that the size of the organic waste be adjusted to the above size beforehand as needed. [1.1 Gasification Treatment Equipment] In a gasification treatment facility, organic waste is thermally decomposed (gasified). This gasification treatment facility can produce gases containing CO, CO₂ , and H₂ from organic waste. A gasification treatment facility is a means of gasifying (thermal decomposition) organic waste supplied to the facility by reactions such as water-gas reactions (steam reforming, shift reaction) and partial oxidation methods, to produce gases containing CO, CO₂ , and H₂ . A gasification treatment facility usually comprises at least a sealed gasification tank for holding organic waste and carrying out the gasification reaction, and a heating means for thermally decomposing the organic waste. The heating means is a means of heating the gasification tank, and is a means of heating the organic waste in the gasification tank to a temperature at which it can be gasified. This usually occurs under heating. The heating temperature is, for example, 800°C or higher, 900°C or higher, or 1000°C or higher. It may also be pressurized (1 MPa or higher) as needed. Examples of heating means include a method of flowing a heat transfer medium (steam, hot oil) inside the jacket of the inner wall of the gasification t