Complex facility having biologically gasifying facility and facility of carbonization and conversion into fuel

Abstract

To provide a complex facility having a facility of carbonization and conversion into a fuel which can use fermentation residual water in a biologically gasifying facility.SOLUTION: A complex facility includes a biologically gasifying facility 10 having a fermentation tank 12 for performing methane fermentation of an organic waste and generating biological gas and a first flow channel 15 for draining fermentation residual water used in the fermentation tank 12, and a facility 30 of carbonization and conversion into a fuel having a carbonization facility 34 for converting waste into a carbide 40 and a desalination facility 31 for desalting the carbide 40 carbonized by the carbonization facility 34 with desalination water 45, and a control device 60 for controlling the biologically gasifying facility 10 and the facility 30 of carbonization and conversion into the fuel, wherein the first flow channel 15 of the biologically gasifying facility 10 is connected to the desalination facility 31 of the facility 30 of carbonization and conversion into the fuel, and the control device 60 supplies the fermentation residual water 21 of the biologically gasifying facility 10 as the desalination water 45 to the desalination facility 31 through the first flow channel 15, when the facility 30 of carbonization and conversion into the fuel is operated.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present application relates to a complex facility including a biogasification facility and a carbonization facility. [Background technology]

[0002] Conventionally, biogasification facilities have been proposed that ferment organic waste such as food waste and livestock waste in a fermentation tank to produce methane and recover biogas. In biogasification facilities, after the organic waste is fermented in the fermentation tank, the water used in the fermentation tank is treated in a wastewater treatment device that uses chemicals and other methods before being discharged.

[0003] On the other hand, carbonization facilities have been proposed that turn food waste into carbonized material and use it as soil improvement material or fuel, etc. In carbonization facilities, food waste is carbonized in a carbonization facility, and the carbonized material is desalted in a desalting facility to be used as carbonized fuel, etc.

[0004] One such document is a biogas system that produces biogas by methane fermentation of organic waste (see, for example, Patent Document 1). This system is equipped with a carbonization device that carbonizes a concentrated fermentation residue and solids obtained by methane fermentation of organic waste in a methane fermentation device to produce a carbonized product. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2005-87978 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the biogas system described in the above document, the solid matter obtained by solid-liquid separation of the fermentation residue in the fermenter and the concentrated liquid matter are converted into carbonized fuel, but a treatment device is required to discharge the liquid, which necessitates a wastewater treatment device to treat the large amount of residual water from methane fermentation in the fermenter.

[0007] The present application aims to provide a complex facility equipped with a carbonization fuel production facility that can utilize residual fermentation water in a biogasification facility. [Means for solving the problem]

[0008] A complex facility according to one embodiment of the present application comprises a biogasification facility having a fermentation tank that generates biogas by methane fermentation of organic waste and a first flow path for discharging residual fermentation water used in the fermentation tank; a carbonization fuel facility having a carbonization equipment that converts waste into carbonized material and a desalting equipment that desalts the carbonized material carbonized in the carbonization equipment with desalted water; and a control device that controls the biogasification facility and the carbonization fuel facility, wherein the first flow path of the biogasification facility is connected to the desalting equipment of the carbonization fuel facility, and the control device supplies the residual fermentation water of the biogasification facility to the desalting equipment as the desalted water via the first flow path when the carbonization fuel facility is in operation. Effect of the Invention

[0009] According to the present application, it is possible to provide a complex facility in which residual fermentation water from a biogasification facility can be used in a carbonization fuel facility. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a block diagram illustrating a complex according to an embodiment of the present application. [Diagram 2] Figure 2 is a block diagram showing an example of a configuration in which the residual fermentation water from the biogasification facility shown in Figure 1 is used as desalted water in a desalination equipment of a waste-to-fuel facility, and a configuration in which the desalted water is used as spray water in the waste-to-fuel facility. [Diagram 3] FIG. 3 is a flow diagram showing the process of using the residual fermentation water from the biogasification facility shown in FIG. 2 as desalted water in a desalination facility of a waste-to-fuel conversion facility. [Figure 4]FIG. 4 is a table showing an example of adjusting the electrical conductivity so that the residual fermentation water from the biogasification facility shown in FIG. 3 can be used in a desalination facility at a waste-to-fuel conversion facility. [Diagram 5] FIG. 5 is a flow diagram showing the process of using the desalted water in the desalting equipment of the waste carbonization and fuel facility shown in FIG. 2 as spray water for the gas cooling tower. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] A complex facility 1 according to an embodiment of the present application will be described below with reference to the drawings. The complex facility 1 of the following embodiment will be described as an example equipped with a waste-to-fuel facility 30 and a biogasification facility 10, taking a waste-to-fuel facility 30 as an example of a carbonized fuel facility. In this specification and claims, "waste" refers to waste including organic waste, such as food waste from general households and livestock waste.

[0012] <Overall structure of the complex> FIG. 1 is a block diagram showing a complex facility 1 according to one embodiment. The complex facility 1 includes a biogasification facility 10 and a waste-to-fuel facility 30. The complex facility 1 in FIG. 1 shows the biogasification facility 10 at the bottom and the waste-to-fuel facility 30 at the top. The complex facility 1 of this embodiment includes a waste pit 70 on the left side of the figure. In the waste pit 70 of this embodiment, waste brought into a carry-in entrance 71 enters a first chamber 72. In the waste pit 70 of this embodiment, the waste brought into the first chamber 72 is crushed, moved to a second chamber 73, and the waste in the second chamber 73 is supplied to the waste-to-fuel facility 30. In addition, the second chamber 73 is configured to mix the fermentation residue 20 of the biogasification facility 10 with the waste to be supplied to the waste-to-fuel facility 30.

[0013] <Biogasification facility configuration> The biogasification facility 10 of this embodiment is equipped with a biogasification equipment 11 having a fermentation tank 12 that generates biogas 22 by methane fermentation of organic waste supplied from a garbage pit 70. The garbage in the garbage pit 70 is crushed by a mixer in a pretreatment equipment 14, and the organic waste is supplied to the fermentation tank 12 of the biogasification equipment 11. The pretreatment equipment 14 separates materials unsuitable for fermentation 25, such as plastics, from the crushed garbage, and returns the materials unsuitable for fermentation 25 to the garbage pit 70. The biogasification facility 10 of this embodiment also supplies sludge 75, which is organic waste, to the fermentation tank 12 of the biogasification equipment 11.

[0014] The biogasification facility 11 performs methane fermentation of organic waste in the fermentation tank 12 to generate biogas 22. The biogasification facility 11 includes a dehydrator 13 that separates the discharge from the fermentation tank 12 into solid and liquid. The dehydrator 13 separates the discharge from the fermentation tank 12 into fermentation residue 20 and fermentation residual water 21. The fermentation residue 20 is returned to the second chamber 73 of the waste pit 70 via a return path 74. The fermentation residue 20 is converted from the second chamber 73 to carbonized fuel in the waste-to-fuel facility 30. The fermentation residual water 21 is discharged to the first flow path 15. The first flow path 15 is provided with a chemical / dilution water supply device 16 that adjusts the components of the fermentation residual water 21. This complex facility 1 utilizes the fermentation residual water 21 in the biogasification facility 11 as desalted water 45 in the desalting device 31 of the waste-to-fuel facility 30. For this reason, the first flow path 15 is connected to a desalination facility 31 in a waste-to-fuel conversion facility 30. The use of the residual fermentation water 21 as desalted water 45 in the desalination facility 31 will be described in detail later.

[0015] The biogasification facility 10 of this embodiment is equipped with a gas engine 17 that is driven by the biogas 22 generated in the fermenter 12. The gas engine 17 drives a generator 18, which generates a predetermined amount of electricity. The generated electricity can be used in the biogasification facility 10 and the waste-to-fuel conversion facility 30. In addition, the biogas 22 generated in the biogasification facility 10 can be used as a supporting gas for waste carbonization in the carbonization equipment 34 of the waste-to-fuel conversion facility 30.

[0016] <Configuration of the waste carbonization facility> The waste carbonization fuel facility 30 of this embodiment includes a carbonization facility 34 that converts unsuitable materials for fermentation supplied from a waste pit 70 into a carbonized material 40 together with the fermentation residue 20 of the biogasification facility 10, and a desalting facility 31 that desalinates the carbonized material 40 carbonized in the carbonization facility 34 with desalted water 45. The carbonization facility 34 converts waste containing fermentation residue into a carbonized material in a carbonization furnace. The desalting facility 31 washes the carbonized material 40 containing chlorine derived from the waste with water to remove water-soluble chlorine. The desalting facility 31 receives the fermentation residue 21 discharged from the biogasification facility 11 of the biogasification facility 10 and supplies it to a desalting storage tank 32 as desalted water 45 via a first flow path 15.

[0017] The waste carbonization and fuel facility 30 also includes a combustion furnace 35 that burns combustible gas in the exhaust gas 43 from the carbonization equipment 34, and a gas cooling tower 36 that cools the high-temperature exhaust gas 44 discharged from the combustion furnace 35. The combustion furnace 35 incinerates the exhaust gas 43 at, for example, about 800°C to 900°C to suppress the generation of dioxins. The gas cooling tower 36 cools the high-temperature exhaust gas 44 discharged from the combustion furnace 35 by spraying it with water.

[0018] The waste carbonization fuel facility 30 uses the desalinated water 45 used in the desalination storage tank 32 of the desalination equipment 31 as the spray water in the gas cooling tower 36. The desalinated water 45 is supplied to the gas cooling tower 36 from a second flow path 38. The use of the desalinated water 45 as the spray water in the gas cooling tower 36 will be described in detail later. Fly ash 46 contained in the flue gas cooled in the gas cooling tower 36 is recovered, and the flue gas is exhausted 47.

[0019] <Control device> The operation of the biogasification facility 10 and the waste-to-fuel facility 30 is controlled by a control device 60. The control device 60 has a processor, volatile memory, nonvolatile memory, an I / O interface, etc. The control device 60 controls the individual and linked operations of each component in the biogasification facility 10 and each component in the waste-to-fuel facility 30. The control device 60 includes a plurality of sensors. The sensors include a sensor that measures the electrical conductivity of the residual fermentation water. The control device 60 compares the measured electrical conductivity with the set electrical conductivity of the desalted water in the desalting equipment 31 by the processor performing calculations using the volatile memory based on a program stored in the nonvolatile memory, and determines the amount of dilution water that will make the electrical conductivity of the residual fermentation water equal to or lower than the set electrical conductivity.

[0020] The functions of the elements disclosed herein can be performed using circuits or processing circuits, including general purpose processors, special purpose processors, integrated circuits, Application Specific Integrated Circuits (ASICs), conventional circuits, and / or combinations thereof, configured or programmed to perform the disclosed functions. Processors are considered processing circuits or circuits because they include transistors and other circuits. In this application, a circuit, unit, or means is hardware that performs the recited functions or hardware that is programmed to perform the recited functions. The hardware may be hardware disclosed herein or other known hardware that is programmed or configured to perform the recited functions. In the case where the hardware is a processor, which is considered a type of circuit, the circuit, means, or unit is a combination of hardware and software, and the software is used to configure the hardware and / or the processor.

[0021] <Example of configuration using residual fermentation water> FIG. 2 is a block diagram showing an example of a configuration in which the fermentation residual water 21 of the biogasification facility 10 shown in FIG. 1 is used as the desalted water 45 in the desalting equipment 31 of the waste-to-carbonized fuel facility 30, and a configuration in which the desalted water 45 is used as spray water in the waste-to-carbonized fuel facility 30. The desalting storage tank 32 of the waste-to-carbonized fuel facility 30 has a set value for the degree of contamination of water that can be used as the desalted water 45. This set value differs depending on the desalting storage tank 32 of the waste-to-carbonized fuel facility 30. Meanwhile, the degree of contamination of the fermentation residual water 21 of the biogasification facility 10 differs depending on the type of organic waste fermented in the fermenter 12. Therefore, it is necessary to determine whether the fermentation residual water 21 discharged from the biogasification facility 10 can be used as the desalted water 45 based on its degree of contamination. In this embodiment, electrical conductivity is used as an example of an index for determining the degree of contamination of the fermentation residual water 21. The configuration example shown in Fig. 2 shows a configuration example in the case of the electrical conductivity shown in Fig. 4(A) described later, and is an example in which the residual fermentation water 21 discharged from the biogasification facility 10 cannot be used due to its level of contamination. In the example of Fig. 2, the contamination of the residual fermentation water 21 is set to a set value by the decontamination device 19 and dilution water 51. Note that the degree of contamination of the residual fermentation water 21 may be determined by other methods, and the determination of the degree of contamination is not limited to the electrical conductivity.

[0022] The fermentation residual water 21 discharged from the dehydrator 13 of the biogasification facility 11 to the first flow path 15 is supplied to the desalination storage tank 32 of the desalination facility 31 through the detoxification device 19. The desalination storage tank 32 is supplied with dilution water 51 from the industrial water 50 in an amount that makes the electrical conductivity of the fermentation residual water 21 supplied from the detoxification device 19 to the desalination storage tank 32 equal to or lower than the set electrical conductivity, which is a set value in the desalination storage tank 32. As a result, the fermentation residual water 21 supplied to the inside of the desalination storage tank 32 becomes water with a set electrical conductivity or lower that can be used as desalted water 45, and is used as the desalted water 45. The carbonized material desalted in the desalination storage tank 32 is dehydrated by the dehydrator 33 and discharged. The dehydrated carbonized material 41 is granulated in the granulator 37 to become carbonized fuel 42.

[0023] Desalinated water 45 discharged from the dehydrator 33 of the desalination facility 31 has suspended solids and the like removed by wastewater treatment 48, and is stored in the spray water tank 39. To the spray water tank 39, make-up water 52 is added from industrial water 50 to make up for the shortage of water sprayed in the gas cooling tower 36. The water stored in the spray water tank 39 is sprayed as cooling water in the gas cooling tower 36. Each of these operations is controlled by a control device 60.

[0024] <Examples of using residual fermentation water> Fig. 3 is a flow diagram showing the process of using the residual fermentation water 21 from the biogasification facility 10 shown in Fig. 2 as desalted water in the desalting equipment 31 of the waste-to-fuel facility 30. Fig. 4 is a table showing an example of adjusting the electrical conductivity so that the residual fermentation water 21 from the biogasification facility 10 shown in Fig. 3 can be used in the desalting equipment 31 of the waste-to-fuel facility 30. The electrical conductivity increases as the number of ions in the water increases, so that the electrical conductivity increases when there are many impurities in the water and decreases when the impurities in the water are removed. The control device 60 uses these changes in electrical conductivity to determine the degree of contamination of the residual fermentation water 21.

[0025] The degree of contamination of the residual fermentation water 21 discharged from the biogasification facility 10 varies depending on the type of organic waste being fermented in the fermenter 12. For this reason, depending on the degree of contamination, the residual fermentation water 21 may not be usable as it is as desalted water in the desalting equipment 31 of the waste-to-fuel facility 30.

[0026] The flow shown in FIG. 3 is an example of a case where the fermentation residual water 21 discharged from the biogasification equipment 11 of the biogasification facility 10 is used as the desalted water 45 in the desalting storage tank 32 in the desalting equipment 31 of the waste carbonization fuel facility 30. The control device 60 first measures the electrical conductivity of the fermentation residual water 21 discharged from the biogasification equipment 11 (S1). The control device 60 supplies the fermentation residual water 21, whose electrical conductivity value has been measured, to the desalting storage tank 32 as the desalted water 45 (S2). The control device 60 then determines the difference between a set electrical conductivity that can be used as the desalted water 45 in the desalting storage tank 32 and the electrical conductivity of the fermentation residual water 21 (S3). The fermentation residual water 21 is usually dirty, and therefore has a higher electrical conductivity value than the set electrical conductivity that can be used as the desalted water 45. From the difference between the compared electrical conductivities, the control device 60 determines the amount of dilution water 51 required to make the electrical conductivity of the fermentation residual water 21 equal to or lower than the set electrical conductivity that can be used as desalted water 45 in the desalination storage tank 32 (S4). The control device 60 supplies the determined amount of dilution water 51 to the desalination storage tank 32 to add it to the fermentation residual water 21 (S5). As a result, the electrical conductivity of the desalted water 45 in the desalination storage tank 32 becomes equal to or lower than the set electrical conductivity.

[0027] As shown in FIG. 4, when the fermentation residual water 21 is used as the desalted water 45 in the desalination storage tank 32, the treatment can be changed depending on the degree of contamination. The table shown in FIG. 4 shows an example of the electrical conductivity value used as an index for determining the degree of contamination. The example shown in FIG. 4(A) is a case where the electrical conductivity of the fermentation residual water 21 discharged from the biogasification facility 11 is 1800ms / m. The desalination storage tank 32 is a case where the set electrical conductivity of the desalted water 45 is 500ms / m. In the example of (A), since the electrical conductivity of the fermentation residual water 21 is high, the electrical conductivity cannot be reduced to a set electrical conductivity that can be used as the desalted water 45 in the desalination storage tank 32 by the dilution water 51 alone. For this reason, the electrical conductivity of the fermentation residual water 21 is first passed through a detoxification device 19 to reduce the electrical conductivity. The detoxification device 19 can be, for example, a membrane device. The membrane device removes dirt, for example, by passing the fermentation residual water 21 through a membrane having numerous holes with a diameter of about several tenths of a micrometer. The detoxification device 19 can reduce the electrical conductivity of the fermentation residual water 21 in this example from 1800ms / m to 750ms / m. The fermentation residual water 21 whose electrical conductivity has been reduced to 750ms / m by the detoxification device 19 is supplied to the desalination storage tank 32. A predetermined amount of dilution water 51 with an electrical conductivity of 12ms / m is added to the desalination storage tank 32 to make the desalination water 45 equal to or lower than the set electrical conductivity. As a result, the electrical conductivity of the desalination water 45 inside the desalination storage tank 32 becomes 400ms / m, which is equal to or lower than the set electrical conductivity. In this way, the electrical conductivity of the desalination water 45 inside the desalination storage tank 32 is made equal to or lower than the set electrical conductivity.

[0028] The example (B) shown in FIG. 4 is a case where the electrical conductivity of the fermentation residual water 21 discharged from the biogasification facility 11 is 800ms / m. In this example, the desalination storage tank 32 also has a set electrical conductivity of 500ms / m for the desalination water 45. In the example (B), since the electrical conductivity of the fermentation residual water 21 is low, the electrical conductivity is set to a set electrical conductivity or less that can be used as the desalination water 45 in the desalination storage tank 32 using only the dilution water 51. The fermentation residual water 21 of 800ms / m discharged from the biogasification facility 11 is supplied to the desalination storage tank 32. A predetermined amount of dilution water 51 with an electrical conductivity of 12ms / m is added to the desalination storage tank 32 to set the electrical conductivity of the desalination water 45 to a set electrical conductivity or less. As a result, the electrical conductivity of the desalination water 45 in the desalination storage tank 32 becomes 450ms / m, which is less than the set electrical conductivity. In this way, the electrical conductivity of the desalted water 45 inside the desalination storage tank 32 is kept below the set electrical conductivity.

[0029] <Examples of using desalinated water> FIG. 5 is a flow diagram showing a flow of using the desalted water in the desalting equipment 31 of the waste carbonization and fuel facility 30 shown in FIG. 2 as the spray water in the gas cooling tower 36. The control device 60 first measures the amount of wastewater discharged from the dehydrator 33 of the desalting equipment 31 (S11). The control device 60 then obtains the difference between the amount of spray water sprayed in the gas cooling tower 36 and the amount of wastewater from the dehydrator 33 (S12). The control device 60 then adds the insufficient amount of spray water to the desalted water 45 discharged from the dehydrator 33 as make-up water 52 (S13), and stores the water in the spray water tank 39 (S14). The control device 60 sprays the spray water stored in the spray water tank 39 in the gas cooling tower 36 (S15) to cool the high-temperature flue gas 44.

[0030] <Summary> As described above, in the above-described complex facility 1, after biogas 22 is generated in the fermenter 12 of the biogasification facility 11, the fermentation residual water 21 that has been subjected to solid-liquid separation in the dehydrator 13 can be used as desalinated water 45 in the desalination storage tank 32 in the desalination facility 31 of the waste-to-fuel facility 30. In addition, the fermentation residual water 21 used as the desalination water 45 in the desalination storage tank 32 can be used as spray water in the gas cooling tower 36. As a result, the fermentation residual water 21 in the biogasification facility 10 can be finally used as spray water in the gas cooling tower 36 to become steam, which can be used as exhaust gas 47 to be released into the atmosphere.

[0031] That is, the complex facility 1 can produce carbonized fuel 42 from organic waste such as food waste at the waste-to-fuel facility 30, and can utilize the residual fermentation water 21 from which biogas 22 is generated at the biogasification facility 10 as the desalted water 45 required in the process of producing the carbonized fuel 42. Therefore, the complex facility 1 can effectively utilize the residual fermentation water 21 that is no longer needed at the biogasification facility 10 at the waste-to-fuel facility 30. In this way, the complex facility 1 can produce biogas 22 and carbonized fuel 42 from organic waste such as food waste, and can also eliminate the need for a wastewater treatment device that would be required to drain the residual fermentation water 21 at the biogasification facility 10.

[0032] In addition, the complex facility 1 can obtain electricity for use in the biogasification facility 10 and the waste-to-fuel facility 30 by driving a gas engine 17 with the biogas 22 produced in the biogasification facility 10 to generate electricity in the generator 18. Furthermore, the biogas 22 generated in the biogasification facility 10 can also be used as a supporting gas for waste carbonization in the carbonization equipment 34 of the waste-to-fuel facility 30. Therefore, it is possible to configure a complex facility 1 with a high energy utilization rate.

[0033] <Other embodiments> In the above-described embodiment, the decontamination device 19 has been described as an example of a configuration for removing contaminants from the fermentation residual water 21 of the biogasification facility 10, but the contaminants from the fermentation residual water 21 may be removed using other configurations and are not limited to the above-described embodiment.

[0034] Furthermore, the above-described embodiment is an example, and the gas engine 17 is not necessarily a necessary component. The complex facility 1 may be modified in various ways without departing from the gist of this application, and this application is not limited to the above-described embodiment.

[0035] Each of the following sections is a disclosure of a preferred embodiment. [Item 1] A complex facility comprising: a biogasification facility having a fermentation tank that generates biogas by methane fermentation of organic waste and a first flow path for discharging residual fermentation water used in the fermentation tank; a carbonization fuel facility having a carbonization equipment that carbonizes garbage and a desalting equipment that desalts the carbonized material carbonized in the carbonization equipment with desalted water; and a control device that controls the biogasification facility and the carbonization fuel facility, wherein the first flow path of the biogasification facility is connected to the desalting equipment of the carbonization fuel facility, and the control device supplies the residual fermentation water of the biogasification facility to the desalting equipment as the desalted water via the first flow path when the carbonization fuel facility is in operation.

[0036] With this configuration, the organic waste is fermented in the biogasification facility to produce biogas, and the residual fermentation water can be used as desalinated water in the desalination equipment in the carbonization facility. Therefore, there is no need for a wastewater treatment device to discharge the residual fermentation water in the biogasification facility.

[0037] [Item 2] The carbonization fuel facility comprises a combustion furnace that burns combustible gas in the exhaust gas from the carbonization equipment, a gas cooling tower that cools the exhaust gas from the combustion furnace, and a second flow path between the desalination equipment and the gas cooling tower, and the control device supplies the desalted water used in the desalination equipment to the gas cooling tower as cooling water via the second flow path when the carbonization fuel facility is in operation.

[0038] With this configuration, the desalted water used for desalting the carbide in the desalination facility can be used as spray water for cooling the combustion gas in the gas cooling tower.

[0039] [Item 3] The control device measures the electrical conductivity of the fermentation residual water, compares the measured electrical conductivity with a set electrical conductivity of the desalted water in the desalting equipment, and adds dilution water to the fermentation residual water in an amount such that the electrical conductivity of the fermentation residual water is equal to or lower than the set electrical conductivity.

[0040] With this configuration, even if the fermentation residual water is highly polluted, the electrical conductivity of the fermentation residual water can be compared with the set electrical conductivity of desalted water in the desalting equipment, and dilution water can be added so that the electrical conductivity of the fermentation residual water is equal to or lower than the set electrical conductivity of the desalted water, so that the fermentation residual water can be used as desalted water.

[0041] [Item 4] 4. The complex facility according to any one of items 1 to 3, further comprising a decontamination device that treats the fermentation residual water before supplying it to the desalination facility, the decontamination device having a membrane treatment device that removes contaminants from the fermentation residual water.

[0042] With this configuration, even if the residual fermentation water is more polluted, a predetermined amount of the pollutants can be removed by the membrane treatment device of the decontamination device, and water with reduced electrical conductivity can be supplied to the desalination facility.

[0043] [Item 5] 5. A complex facility according to any one of items 1 to 4, further comprising a garbage pit for storing the garbage, the garbage pit having a first chamber for supplying the garbage to the biogasification facility and a second chamber for supplying the garbage to the carbonization facility, the biogasification facility comprising a pretreatment facility for separating the organic waste from the garbage in the first chamber and supplying the organic waste to the fermentation tank.

[0044] With this configuration, garbage from the garbage pit can be supplied from the second chamber to a garbage carbonization fuel facility where it can be converted into carbonized fuel, and garbage supplied from the first chamber to a biogasification facility can have organic waste separated in a pretreatment facility before being supplied to a fermentation tank.

[0045] [Item 6] 6. The complex according to item 5, wherein the biogasification facility has a return path for returning the fermentation residue of the fermenter to the second chamber.

[0046] With this configuration, the fermentation residue from the methane fermentation in the fermentation tank of the biogasification facility can be converted into carbonized fuel in the carbonization facility for effective use. Therefore, the complex can increase the energy recovery rate of organic waste.

[0047] [Item 7] 7. A complex facility as described in any one of items 1 to 6, further comprising a gas engine driven by the biogas generated in the fermenter, and a generator driven by the gas engine, wherein the control device supplies electricity generated by the generator to the carbonization fuel facility for use.

[0048] With this configuration, methane gas produced in the biogasification facility can be used to generate electricity, and the generated electricity can be effectively used as electricity needed in the carbonization fuel facility. [Explanation of symbols]

[0049] 1. Complex Facility 10. Biogasification facility 11 Biogasification facility 12 Fermentation tank 13 Dehydration equipment 15 First flow path 17 Gas Engine 18. Generator 19 Abatement equipment 20 Fermentation residue 21 Fermentation residual water 22 Biogas 30 Refuse carbonization facility (carbonization facility) 31 Desalination equipment 32 Desalination storage tank 33 Dehydrator 36 Gas Cooling Tower 38 Second Channel 40 Carbide 42 Carbonized fuel 45 Desalinated Water 50 Industrial water 51 Dilution Water 52 Replenishment water 60 Control device 70 Garbage Pit 72 Room 1 73 Room 2

Claims

1. A biogasification facility having a fermentation tank that generates biogas by methane fermentation of organic waste and a first flow path that drains residual fermentation water used in the fermentation tank; a carbonization fuel facility having a carbonization equipment that converts garbage into carbonized material and a desalting equipment that desalts the carbonized material carbonized in the carbonization equipment with desalted water; A control device for controlling the biogasification facility and the carbonization facility, The first flow path of the biogasification facility is connected to the desalination equipment of the carbonization facility, The control device supplies the residual fermentation water from the biogasification facility to the desalination equipment as the desalted water via the first flow path during operation of the carbonization fuel facility.

2. The carbonization fuel facility includes a combustion furnace that combusts combustible gas in the exhaust gas of the carbonization equipment, a gas cooling tower that cools the exhaust gas of the combustion furnace, and a second flow path between the desalination equipment and the gas cooling tower, The complex facility according to claim 1 , wherein the control device supplies the desalted water used in the desalination equipment to the gas cooling tower as cooling water via the second flow path during operation of the carbonization fuel facility.

3. The complex facility described in claim 1 or 2, wherein the control device measures the electrical conductivity of the fermentation residual water, compares the measured electrical conductivity with the set electrical conductivity of the desalted water in the desalting equipment, and adds an amount of dilution water to the fermentation residual water such that the electrical conductivity of the fermentation residual water is equal to or lower than the set electrical conductivity.

4. The apparatus further includes a detoxification device for treating the residual fermentation water before supplying the residual fermentation water to the desalination facility. The complex facility according to claim 3 , wherein the decontamination device has a membrane treatment device for removing contaminants from the residual fermentation water.

5. A garbage pit for storing the garbage is provided, The waste pit has a first chamber for supplying the waste to the biogasification facility and a second chamber for supplying the waste to the carbonization facility, The complex according to claim 1 or 2, wherein the biogasification facility is provided with a pretreatment facility that separates the organic waste from the garbage in the first chamber and supplies the organic waste to the fermentation tank.

6. The complex according to claim 5 , wherein the biogasification facility has a return path for returning the fermentation residue of the fermenter to the second chamber.

7. Further comprising a gas engine driven by the biogas generated in the fermenter and a generator driven by the gas engine, The complex facility according to claim 1 or 2, wherein the control device supplies electricity generated by the generator to the carbonized fuel production facility for use.

Images