Circular system for organic waste

Abstract

The present invention aims to provide a circular system that enables 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.

Description

Technical Field

[0001] The present invention relates to a circular system for organic waste.

Background Art

[0002] So-called recycling systems that include a process of pyrolyzing waste such as used tires have been developed. For example, Patent Document 1 describes that by applying heat and pressure optimal for cutting only crosslinking points while extruding rubber waste materials with a two-axis screw, it is possible to efficiently recycle in a short time with a quality close to that of unprocessed rubber. Patent Document 2 describes obtaining monomers such as methanol using microorganisms from C1 gas derived from biomass.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Disclosure of the Invention

Problems to be Solved by the Invention

[0004] However, recycled materials made from waste such as rubber and resin often have inferior performance and functions compared to virgin materials. Since these wastes contain various components in various compositions, horizontal recycling is difficult. As a result, most of the used rubber and resin are treated by incineration, landfill, reuse as fuel such as RPF (Refuse Paper & Plastic Fuel), etc., and in any case, the environmental load is large. An object of the present invention is to provide a circular system that can achieve horizontal recycling and upgrade recycling of organic waste.

Means for Solving the Problems

[0005] The present invention provides the following: [1] A gasification treatment facility that pyrolyzes organic waste and synthesizes 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 described in [1], wherein the organic waste is general waste, industrial waste, shredder dust, biomass, sludge, marine plastics, microplastics, construction waste, disaster waste, or textiles and clothing. [3] The system described in [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] Organic waste is a system described in any one of items [1] to [3], including rubber composite materials. [5] Further equipped with crushing equipment for crushing organic waste, In the aforementioned crushing equipment, the organic matter content of the organic waste is adjusted. A system described in any one of items [1] to [4]. [6] The pyrolysis is carried out under temperature conditions of 800°C or higher, using the system described in any one of items [1] to [5]. [7] The system according to any one of the items [1] to [6], wherein the microorganism is a microorganism capable of utilizing any of CO2, CO, and H2 in the gas. [8] The system according to any one of [1] to [7], wherein the microorganism is further a microorganism having an enzyme capable of polymerizing the products of the microorganism using monomer raw materials. [9] The system according to any one of items [1] to [8], wherein the modified compound is an isoprene 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. A system described in any one of items [1] to [9].

[11] The monomer raw material is an isoprene compound, The system according to

[10] , wherein the polymer is a polyisoprene-based (co)polymer.

[12] A system according to any one of items [1] to

[11] , 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 device.

[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 described in

[12] .

[14] The system according to any one of items [1] to

[13] , further comprising a wastewater recovery facility that sends at least a portion of the wastewater from the microbial culture facility to a gasification treatment facility. [Effects of the Invention]

[0006] According to the present invention, various modified compounds can be obtained from organic waste such as rubber, thereby enabling horizontal recycling and upgrade recycling. Furthermore, by using organic waste as raw material and employing biological methods, the amount of waste to be incinerated can be reduced, leading to expected reductions in carbon dioxide emissions and improved energy efficiency. In addition, it is possible to reduce the amount of virgin material, which is a fossil resource, used, and to reduce or eliminate carbon dioxide emissions from fossil resources during disposal. [Brief explanation of the drawing]

[0007] [Figure 1] Figure 1 is a schematic diagram showing an overview of the system according to the first embodiment of the present invention. [Figure 2] Figure 2 is a schematic diagram showing an overview of the system according to the second embodiment of the present invention. [Figure 3]FIG. 3 is a schematic diagram showing an overview of the system according to the third embodiment of the present invention. [Figure 4] FIG. 4 is a schematic diagram showing an overview of the system according to the fourth embodiment of the present invention. [Figure 5] FIG. 5 is a schematic diagram showing an overview of the system according to the fifth embodiment of the present invention. [Figure 6] FIG. 6 is a schematic diagram showing an overview of the system according to the sixth embodiment of the present invention. [Figure 7] FIG. 7 is a schematic diagram showing an overview of the system according to the seventh embodiment of the present invention.

Embodiments for Carrying Out the Invention

[0008] Hereinafter, embodiments of the present disclosure will be described in detail based on the drawings. Note that the present disclosure is not limited by the embodiments described below.

[0009] 〔1. Overview of the System〕 The circular system of the present invention includes a gasification treatment facility and a microorganism culture facility, and preferably may further include one or more selected from the group consisting of a crushing facility, a polymerization facility, a steam recovery facility, and a drainage recovery facility. Thereby, the regeneration and reuse of organic waste can be realized.

[0010] 〔Organic Waste〕 In this specification, the organic waste may be any waste containing organic substances (hydrocarbons), which may be either industrial waste or general waste, or may be materials recovered at the recycling facilities of factories or local governments. For example, soft and putrefactive organic wastes such as waste plastics, waste rubbers (natural rubber, synthetic rubber), used paper, shredder dust (automobile-related, waste household appliance-related), and putrefactive wastes such as biomass (e.g., driftwood stranded due to disasters, food waste, waste paper, black liquor, organic sludge (such as sewage sludge), livestock manure, night soil sludge, construction-generated wood, residual materials from sawmills, etc.), and mixtures thereof. The organic waste preferably contains a rubber-based material or a rubber-based composite material such as tires, automobile hoses, rubber sheets, vibration-proof rubber, and breaker cords, and more preferably contains a rubber-based composite material. By being a rubber-based material or a rubber-based composite material, it can be used as a substitute raw material for natural rubber, so it is expected to improve the labor environment in rubber-producing areas and protect nature by reducing new farmland development and deforestation.

[0011] The organic waste only needs to contain organic components, and preferably contains 50% by weight or more of organic components based on its weight. The organic waste is usually liquid or solid, and preferably solid. In the case of solid organic waste, the size is preferably adjusted to the above size as needed from the perspective of treatment efficiency.

[0012] 〔1.1 Gasification Treatment Equipment〕 In the gasification treatment equipment, the organic waste is pyrolyzed (gasified). The gasification treatment equipment can produce a gas containing CO, CO2, and H2 from the organic waste.

[0013] 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, producing 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 thermal decomposing the organic waste. The heating means is a means of heating the gasification tank, and is a means of heating the organic waste inside 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) if necessary. 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 tank, electric heating wire heaters, microwave heating devices, etc. Examples of gasification treatment facilities include incinerators, gasification and melting furnaces, and gasification and reforming furnaces (kiln type, fluidized bed type).

[0014] The gasification treatment equipment is preferably equipped with a means for supplying the gasifying agent. This allows for efficient gasification. Examples of gasifying agents include water (water vapor), nitrogen gas, oxygen gas, and catalysts. Depending on the gasification reaction method, examples of catalysts include nickel-based catalysts such as nickel and nickel oxide, ruthenium-based catalysts, iron-based catalysts, cobalt-based catalysts, titanium-based catalysts, and oxide-based catalysts.

[0015] Gasification equipment is preferably equipped with a means for supplying a decrosslinking agent. This allows for the decomposition of crosslinked structures in organic waste (e.g., sulfur-derived crosslinks), suppressing the generation of hydrogen sulfide, thereby reducing equipment deterioration, health hazards, and enabling efficient gasification. Examples of decrosslinking agents include metal oxides such as iron oxide, zinc oxide, and magnesium oxide, as well as calcium carbonate, quicklime, activated carbon, and magnesium carbonate.

[0016] The gasification treatment facility preferably further comprises a cooling tank, a washing tank, and a fractionation column. The cooling tank and washing tank are means for cooling and washing the products, respectively, of the gas (which may also contain other gases such as methane, ethane, and propane) produced in the gasification tank, including CO, CO2, and H2. The fractionation column is a means for separating the gas produced in the gasification tank from other products (impurities in the subsequent stage). The fractionation column is connected by a flow path to, for example, a microbial culture facility (for example, a subsequent culture tank), thereby allowing the gas containing CO, CO2, and H2 to be supplied to the microbial culture facility.

[0017] [1.2 Microbial culture equipment] The microbial culture facility is a facility for cultivating microorganisms, including microorganisms capable of converting the aforementioned gas into a modified compound. By culturing the microorganisms, the modified compound can be produced.

[0018] Examples of modified compounds include organic acids such as acetic acid, pyruvic acid, lactic acid, succinic acid, malic acid, fumaric acid, formic acid, and butyric acid; alcohols such as ethanol, isopropyl alcohol, and butanol; diols such as butanediol; ketones such as acetone; isoprene; butadiene; and other compounds having 2 to 4 carbon atoms; derivatives thereof (e.g., acetyl-CoA); and (co)polymers thereof. Isoprene, butadiene, and their derivatives are preferred, and isoprene and its derivatives (isoprene compounds) are more preferred. Examples of isoprene compounds include isoprene, monoterpenes, diterpenes, triterpenes, and their derivatives. Examples of derivatives include the above compounds having substituents such as carboxyl groups, hydroxyl groups, amino groups, sulfo groups, alkyl groups, oxyalkyl groups, aminoalkyl groups, and cyano groups. The substitution site is not particularly limited and may be one or more carbon atoms included in the isoprene compound. In the case of isoprene, the substitution site may be one or more carbon atoms selected from the carbon atoms at positions 1 to 4, and preferably includes the carbon atom at position 2.

[0019] As microorganisms, at least one microorganism (1) capable of directly producing modified compounds by utilizing (assimilating) gases including CO, CO2, and H2 is used. Furthermore, a microorganism (2) capable of producing another modified compound from the modified compound produced by microorganism (1) may be added. The microorganism may also be one that has the ability to produce modified compounds or whose ability has been enhanced as a result of the introduction of genes related to the synthesis of modified compounds.

[0020] Examples of microorganisms include photosynthetic bacteria such as acetic acid-producing bacteria and microalgae, hydrogen bacteria, isoprene and butadiene-producing bacteria. Specifically, examples include Moorella (e.g., Moorella thermoacetica), Clostridium (e.g., Clostridium autoethanogenum, Clostridium ljungdahlii, Clostridium carboxidivorans), Ruminococcus, Acetobacterium (e.g., Acetobacterium woodii), Eubacterium (e.g., Eubacterium limosum), Butyribacterium (e.g., Butyribacterium methylotrophicum), Oxobacter, Methanosarcina, Desulfotomaculum, and Saccharomyces. Other examples include microorganisms into which genes related to the production of modified compounds (e.g., isoprene synthase genes) have been introduced (e.g., Escherichia coli, methane-assimilating bacteria (e.g., bacteria of the genera Methylococcus, Methylomonas, Methylosinus, Methylocystis, Methylobacter, Methylobacterium, Methylocella, Methylocystis, Methylocapsa, Methylacidiphilum, Methyloacida, Methylibium, Methylomicrobium)).

[0021] Microbial culture equipment typically includes microorganisms and a culture medium, and has a culture tank for the growth of microorganisms and production of modified compounds. The culture medium can have a composition that contains the necessary nutrients depending on the microorganism. The environment inside the culture tank is usually adjusted to an environment in which microorganisms can grow, and modified compounds are preferred. It is connected to a gasification treatment device by a flow path, and microorganisms grow in the tank together with the culture medium. Modified compounds can be cultured using the gas introduced by the software. Since the modified compounds usually accumulate in the culture medium, they can be recovered together with the medium (recovered continuously or in batches) and separated from the medium. Examples of separation methods include, but are not limited to, fractional distillation, vacuum distillation, extractive distillation, evaporation, permeation vaporization, gas stripping, phase separation, and extractive fermentation including liquid-liquid extraction. The microbial culture equipment may further include a separation tank for performing the above separations.

[0022] The culture tanks may be arranged in combination of two or more units. This allows for the production of multiple modified compounds, or the indirect production of modified compounds. Two or more culture tanks may be connected in series or in parallel. Parallel connection allows for the production of multiple modified compounds, while series connection allows for the production of other modified compounds (2), (3), etc., using modified compound (1) directly produced using gas as a material.

[0023] [1.3 Crushing Equipment] A crushing facility is a facility that crushes organic waste before supplying it to a gasification treatment facility. By providing a crushing facility, the size of the organic waste can be adjusted, and the gasification treatment can be carried out efficiently. In this specification, crushing refers to the process of crushing organic waste to a state that is easily gasified. For example, a process that separates components other than organic matter and increases the content of organic matter components that are raw materials for gasification, or a process that removes the adhesive layer between organic matter and inorganic matter (e.g., by dissolution and removal) is preferred.

[0024] The crushing equipment can be selected based on the type of organic waste, and examples include solvent tanks capable of dissolving adhesives such as methylene chloride and formic acid, electromagnetic induction tanks, and media mills such as chain mills, knife mills, hammer mills, and jet mills.

[0025] [1.4 Polymerization Equipment] Polymerization equipment is a facility that uses modified compounds as monomer raw materials and chemically modifies them through polymerization or other processes. By installing polymerization equipment, it is possible to produce desired polymers by chemical modification reactions such as (co)polymerization of monomer raw materials containing modified compounds. In the case of polymerization, a so-called chemical polymerization reaction method may be used, or a biological polymerization reaction using enzymes, etc. (for example, cell-free polymerization (e.g., the method described in Japanese Patent Publication No. 2022-73233) may be used). Chemical modification reactions other than polymerization include, for example, reactions aimed at high functionality, specifically, epoxidation, graft polymerization, hydrogenation, etc. Copolymers may also be produced by introducing other monomers. Polymerization equipment can be appropriately designed according to the type of polymerization, for example, equipment equipped with a reaction vessel, a temperature control device, a polymer recovery device, and a secondary material input device. In this case, it is preferable that the temperature control device, polymer recovery device, and secondary material input device are connected to the reaction vessel. Multiple reaction vessels may be connected in series or in parallel. Series connection allows multiple reaction steps to be carried out under conditions suitable for each. Parallel connection allows different polymers to be produced simultaneously. The secondary material input device is a device for introducing secondary materials that contribute to the progress of the reaction, such as reaction solvents, reaction catalysts, and polymerization initiators, into the reaction vessel, and may be equipped with a hopper or the like for introducing secondary materials as needed.

[0026] [1.5 Heat Recovery Equipment] A heat recovery system is a facility that recovers and utilizes (sends to a destination) the steam generated in a system. By installing a heat recovery system, it is possible to recover the steam generated in the system, mainly from the gasification treatment equipment, and use it for temperature control in microbial culture equipment, as well as for external use (e.g., heated swimming pools, public baths, heating facilities, hot water supply facilities, power generation), thereby realizing more efficient use of energy. A heat recovery system, for example, includes a recovery tank for recovering steam. It may also include a steam turbine and a generator. This allows the thermal energy of the steam to rotate the steam turbine, drive the generator, and generate electricity within the system, enabling the use of electricity to operate the system and further increasing the energy efficiency within the system.

[0027] [1.6 Wastewater Recovery Equipment] A wastewater recovery system is a facility that recovers and utilizes (sends to a destination) wastewater generated by a system. By installing a wastewater recovery system, wastewater generated by the system, mainly the microbial treatment equipment, can be recovered and utilized, thereby increasing the operating efficiency of the system and enabling more effective use of energy. A wastewater recovery system, for example, includes a recovery tank for recovering wastewater. The recovery tank is a means of purification and sterilization, such as activated sludge, so that the purified water can be safely disposed of by discharge into rivers, etc., and biodiversity can be ensured even when genetically modified microorganisms are used. In addition, the wastewater recovery system may also include a connecting pipe that connects the microbial treatment equipment and the gasification treatment equipment. This allows the wastewater to be used for temperature control of the gasification treatment equipment, etc. Preferably, the connecting pipe has a route that directly connects the microbial culture equipment and the gasification treatment equipment without going through the recovery tank. This eliminates the need for purification and sterilization treatment in the recovery tank, and allows the wastewater to be used directly, thereby further increasing the operating efficiency of the system.

[0028] [1.7 Any device] The system may also include devices other than those mentioned above. Examples include a raw material storage tank, transfer pipes, supply rate adjustment equipment, and impurity recovery equipment.

[0029] -Raw material storage tank- The raw material storage tank is where organic waste is introduced and stored, and where it is supplied to the gasification treatment equipment. A hopper is an example of a raw material storage section. The hopper has a holding section for holding organic waste, a discharge section at the bottom of the holding section connected to the gasification treatment equipment, and an input section opening at the top of the holding section for introducing organic waste into the holding section. If a crushing facility is provided, it is preferable that the input section is connected to the crushing facility and adjusted so that crushed organic waste can be supplied to the raw material storage section.

[0030] -Supply amount adjustment equipment- The gasification treatment equipment and the microbial culture equipment may be connected by an introduction pipe that allows the gas obtained after gasification treatment to be introduced into the microbial culture equipment, and it is preferable that the introduction pipe is equipped with a supply adjustment device that can adjust the amount of gas supplied. Examples of adjustment devices include equipment including an on / off valve such as a valve. If the adjustment device is a valve, gas can be supplied to the microbial culture equipment when the valve is open, and the supply of gas to the microbial culture equipment can be stopped when the valve is closed.

[0031] -By-product recovery device- The by-product recovery unit recovers impurities other than gas, wastewater, and water vapor produced in the gasification treatment facility, as well as impurities other than modified compounds produced in the microbial culture facility. By-products include, for example, by-products from gasification and microbial culture (e.g., inorganic substances contained in organic waste (e.g., metals such as iron, stainless steel, lead, zinc, gold, silver, aluminum, and copper)). Impurity recovery units include, for example, carbides remaining after gasification (e.g., unburned carbon (e.g., methane, ethane, propane), light oils, etc.; carbides derived from carbon black). Metals, in particular, generally accumulate in the gasification tank of the gasification treatment facility (e.g., fluidized bed tank), separation tanks installed as needed, and the bottom of the separation tower (e.g., furnace bottom sand after the fluidized sand accumulated at the bottom of the gasification tank has been removed), and can be recovered by extracting these. By-product recovery devices may be installed in each of the gasification treatment facility and the microbial culture facility, or one device may be installed in common to both facilities. The recovered by-products may be discarded, but they can also be used for various purposes after further chemical recycling, thermal recycling, and material recycling.

[0032] [2. System Operation] According to the system of the present invention, organic waste is introduced into a gasification treatment facility to generate gas. The generated gas is supplied to a microbial culture facility, where modified compounds are produced from the gas through microbial culture and recovered. The operation of the system will be explained below, assuming the treatment of rubber-based composite materials as organic waste.

[0033] Figure 1 is a schematic diagram illustrating one configuration of this system. System 1 in Figure 1 comprises a gasification treatment facility 11 and a microbial culture facility 12. The gasification treatment facility 11 is equipped with a hopper 111 for storing organic waste 01 (e.g., rubber-based composite material) that is supplied to the gasification treatment tank 114, and the waste is introduced into the gasification treatment facility via an introduction pipe 112 connecting the hopper 111 and the gasification treatment tank 114. The introduction pipe 112 is equipped with a valve 113 to adjust the amount of organic waste 01 input to the gasification treatment tank 114 (e.g., a fluidized bed type gasification reformer). The gasification treatment tank (furnace) 114 can be heated around it, such as by heating the walls (e.g., by circulating a heat transfer medium), and a gas supply pipe 116 is connected to it. When the rubber composite material 01 is introduced into the gasification tank 114, the inside of the tank is heated by circulating a heat transfer medium around the gasification tank 114, and gases 02 such as nitrogen gas, hydrogen gas, and water vapor (H2O gas) are supplied in a timely manner from a gas tank 115 that stores gases 02 such as nitrogen gas, hydrogen gas, and water vapor (H2O gas) via a gas supply pipe 116 (the gas tank 115A and gas supply pipe 115B may be common to all gases, or each gas may be provided separately). For example, the temperature inside the gasification tank 114 can be raised to 1000°C, and then nitrogen gas, hydrogen gas, and water vapor can be supplied to raise the temperature to 1200°C (for example, at a heating rate of 10°C / min) to carry out the heating reaction. During heating, it is preferable to maintain a reducing atmosphere inside the gasification tank 114 (for example, 80% or more by volume of nitrogen gas, preferably 90% or more by volume, and 20% or less by volume of H2O gas, preferably 15% or less by volume). This allows for the efficient production of gas containing CO2, CO, and H2. The gasification treatment tank 114 is equipped with a cooling tank 116A, a washing tank 116B for cooling and washing the product, and a fractionation column 117 for separating the product. After the heat treatment is complete, the product generated in the gasification treatment tank 114 is washed in the cooling tank 116A and the washing tank 116B, and separated into gas 03 containing CO2, CO, and H2 and other by-products 04 via the fractionation column 117. Gas 03 is transferred to the culture tank 121 of the microbial culture facility 12 via a transport pipe 118. On the other hand, by-products (e.g., metals) 04 are discharged through an outlet pipe (not shown) provided as needed in the fractionation column 117, and are separated and reused as needed.

[0034] In the culture tank 121 of the microbial culture equipment 12, a culture medium 122 containing microorganisms is placed. For example, if the microorganism is an acetic acid producer such as Clostridium, when a gas containing CO2, CO, and H2 is introduced, it produces acetic acid and ethanol as modified compounds, which are accumulated in the culture medium 122. Also, if the microorganism is a combination of an acetic acid-producing bacterium and a microorganism that can utilize acetic acid, ethanol, etc. (for example, a methane-utilizing bacterium into which an enzyme gene such as isoprene synthase has been introduced), isoprene can be produced in the culture tank 121. The culture medium tank 121 can be adjusted to a state suitable for culture, such as temperature and culture medium composition, and this adjustment can be done manually or automatically. The culture medium tank 121 is connected to a separation tank 124 via a discharge pipe 123, and the accumulated modified compounds 05 are recovered from the culture medium in the separation tank 124, purified as needed and used as polymerization raw materials, etc., and then processed again in this system as organic waste.

[0035] Figure 2 is a schematic diagram illustrating another form of this system. Figure 2 is the same as Figure 1 except that it is further equipped with crushing equipment, so only the differences from Figure 1 will be explained below (the same applies to the following figures). In System 2 of Figure 2, a crushing facility 21 is provided for the pretreatment of organic waste 01 supplied to the hopper 111 of the gasification treatment facility 11. The crushing facility 21 is equipped with an electromagnetic induction tank 201. Organic waste 01 (e.g., rubber composite material) is introduced into the crushing tank 201 (e.g., a media mill, an electromagnetic wave induction tank), and the adhesion between the rubber part and the non-rubber part (e.g., a metal part) constituting the rubber composite material is broken off by electromagnetic wave irradiation and physical crushing by the media provided in the mill, causing the two to separate. The crushed material 01A is separated from the metal part using a magnet or the like (not shown), fed into the hopper 101 via a discharge pipe 202, and introduced into the gasification treatment facility 11.

[0036] Figure 3 is the same as Figure 1, except that it includes additional polymerization equipment. System 3 includes polymerization equipment 31 for polymerizing a modified compound using monomer raw materials. Polymerization equipment 31 is connected to a separation tank 124 of microbial culture equipment 12 via a transport pipe 301. The modified compound 05 produced as a result of cultivation in microbial culture equipment 12 is sent to a polymerization tank 302 in polymerization equipment 31. Polymerization tank 302 is equipped with facilities that can adjust temperature, pressure, etc. to conditions suitable for polymerization. Polymerization tank 302 is provided with a hopper for introducing auxiliary raw materials and an auxiliary raw material input pipe for connection (not shown). In polymerization tank 302, for example, in the reaction to obtain polyisoprene from isoprene as a modified compound, it may be subjected to a chemical polymerization reaction together with a polymerization catalyst and solvent, or it may be subjected to an enzymatic polymerization reaction together with rubber tree-derived isoprene polymerase. Other monomers may also be added and subjected to copolymerization. When subjected to an enzymatic polymerization reaction, it is preferable to include a lipid construct such as a proteoliposome containing an enzyme protein related to isoprene synthesis, such as cis-prenyltransferase described in Japanese Patent Application Publication No. 2022-73233, in the polymerization tank. The product is purified in the separation tank 304 via the transport pipe 303 and obtained as polymer 06. Alternatively, a second polymerization tank (connected to the auxiliary raw material tank via an input pipe) may be installed downstream of the polymerization tank 302, connected to polymer 06 by a connecting pipe (not shown). In this case, polymer 06 is moved from the polymerization tank 302 (or separation tank 304), a reaction catalyst or the like is introduced from the auxiliary raw material tank into the second polymerization tank, and a modification reaction such as epoxidation or hydrogenation is carried out in the second reaction tank to obtain further modified polyisoprene.

[0037] Figure 4 is the same as Figure 1, except that it has two or more microbial culture tanks. System 4 in this embodiment includes a microbial culture facility 41, comprising a first microbial culture tank 401 and a second microbial culture tank 402. The first microbial culture tank 401 is supplied with a gas containing CO, CO2, and H2 (not shown), and microorganisms that can utilize such gas (e.g., Clostridium) are cultured in a culture medium 403. These microorganisms produce metabolites such as enzymes like acetyl-CoA and organic acids like acetic acid as the first modified compound 05A. The first microbial culture tank 401 and the second microbial culture tank 402 are connected via transport pipes 402A, 402B, and a separation tank 404 (for separating the modified composition 05A from the culture), and the first modified compound (e.g., acetic acid, ethanol) 05A is transported to the second microbial culture tank 403 via transport pipe 402B. In the second microbial culture tank 403, microorganisms capable of utilizing the first modified compound (for example, methane-utilizing bacteria into which enzyme genes such as isoprene synthase have been introduced) are cultured in culture medium 404, producing isoprene from the first modified compound. The culture from the second microbial culture tank 402 is sent to the separation tank 407 via the outlet pipe 406, where the modified compound isoprene 05B is separated.

[0038] Figure 5 is the same as Figure 3 except that two or more microbial culture tanks are installed in parallel (all connected to the microbial culture tank). In this embodiment, System 5 has a microbial culture facility 51 in which a first microbial culture tank 501 and a second microbial culture tank 502 are installed in parallel. The first microbial culture tank is equipped with culture media 503 and 504, respectively, and microorganisms capable of producing organic acids such as acetic acid using gas 03 containing CO, CO2, and H2 (e.g., Clostridium bacteria) are cultured thereto, producing acetic acid, ethanol, etc. as the first modified compound. Microorganisms capable of directly producing isoprene are cultured thereto. The second microbial culture tank is cultured with microorganisms capable of producing organic acids such as acetic acid using gas containing CO, CO2, and H2 (e.g., styrene-producing bacteria) and microorganisms capable of utilizing acetic acid, ethanol, etc. (e.g., methane-assimilating bacteria into which enzyme genes such as isoprene synthase have been introduced), and isoprene can be produced in culture tank 502. From each microbial culture tank 501 and 502, two modified compounds, acetic acid and ethanol O5A, and isoprene O5B, can be recovered through their respective outlet pipes 505 and 506, and separation tanks 507 and 508.

[0039] Figure 6 is the same as Figure 1, except that it is further equipped with a heat recovery system. The system 6 in this embodiment includes a heat recovery facility 61. The heat recovery facility 61 includes a steam recovery tank 611, a steam turbine 612, a generator 613, and transport pipes 614 and 615. The steam recovery tank 611 is connected to the gasification treatment tank 115 of the gasification treatment facility 11 via a transport pipe 614, and the steam recovery tank 611 and the steam turbine 612, and further the steam turbine 612 and the generator 613 are connected by connecting pipes. Steam 07 generated in the gasification treatment tank 115 is transported to the steam recovery tank 611 via the transport pipe 614, and a portion is sent to the culture tank 121 and used to adjust the temperature of the culture tank, or used externally (as described above, in a heated swimming pool, public bath, heating facility, hot water supply facility, etc.). On the other hand, a portion is sent to the steam turbine 612, which rotates the steam turbine and drives the generator to produce electricity. The generated electricity may be used externally as needed, or it may be used within the system. The heat recovery equipment 61 is typically maintained in a processing environment that preserves steam (for example, by using insulating materials or providing means for heating).

[0040] Figure 7 is the same as Figure 1, except that it is further equipped with wastewater recovery equipment. The system 67 in this embodiment includes a wastewater recovery facility 71. The wastewater recovery facility 71 includes a recovery tank 711 for recovering wastewater 09, and a connecting pipe 712 that connects the microbial treatment facility 12, the gasification treatment facility 11, and the recovery tank 711. The recovery tank is equipped with activated sludge treatment means / sterilization treatment means (such as a heating device). The connecting pipe 712 can not only send wastewater generated from the microbial treatment facility to the recovery tank 711, but can also directly send wastewater from the microbial treatment facility to the gasification treatment facility. Switching between the two methods of wastewater delivery may be done by installing a switching valve, or by providing a connecting pipe 712 that passes through the recovery tank 711 and a connecting pipe 712 that does not pass through the recovery tank 711. This makes it possible to switch between using the wastewater 09 for temperature control in the gasification treatment facility and discharging it outside the system. [Explanation of Symbols]

[0041] 1, 2, 3, 4, 5, 6, 7 Circular System 01 Organic waste 01A Crushed material 02 Gas 03 Gases containing CO2, CO, and H2 04 By-products 05 Modified Compounds 06 polymer 07 Water vapor 08 Electricity 09 Drainage 11. Gasification treatment equipment 111 Hopper 112 Introductory tube 113 Valve 114 Gasification treatment tank 115A Gas Tank 115B Gas supply pipe 116A cooling tank 116B Washing Tank 117 Distillation Columns 118 Transport pipe 12, 41, 51 Microbial culture equipment 121, 401, 402, 501, 502 Culture tank 122, 403, 404, 503, 504 culture medium 123, 406, 505, 506 Outlet pipe 124, 407, 507, 508 Separation tank 402A, 402B Transport pipe 21 Crushing equipment 201 Electromagnetic induction tank 31 Polymerization equipment 301 Transport pipe 302 Polymerization tank 303 Transport pipe 304 Separation tank 61 Heat recovery equipment 611 Steam Recovery Tank 612 Steam Turbine 613 Generator 614, 615 Transport pipe 71 Wastewater recovery equipment 711 Recovery Tank 712 Liaison pipe

Claims

1. By thermally decomposing organic waste, CO2 ２ , CO and H ２ A gasification treatment facility that synthesizes gas containing, 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 and 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 aforementioned microorganisms are CO2 in the gas. ２ , CO and H ２ The system according to claim 1 or 2, wherein the microorganism is capable of assimilating any of the following.

8. The system according to claim 1 or 2, wherein the microorganism is further a microorganism having 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 device.

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 facility that sends at least a portion of the wastewater from a microbial culture facility to a gasification treatment facility.

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