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    • 专利摘要:
    The present invention has: a hydrothermal decomposition processing unit (17) that, by means of a processing tank having a gas-liquid interface, eliminates the hemicellulose component and the lignin component from a biomass starting material having cellulose, hemicellulose, and lignin by means of decomposition processing under high-temperature, high-pressure conditions; a biomass solid content extraction unit (18) that extracts biomass solid content (20), which is the hydrothermally insoluble component processed by the hydrothermal decomposition processing unit (17); a slurrification tank (21) that interconnects to the biomass solid content extraction unit (18) and slurrifies the extracted biomass solid content (20); and a hydrothermal discharge liquid introduction line (L
    公开号:AU2012374915A1
    申请号:U2012374915
    申请日:2012-03-29
    公开日:2014-09-18
    发明作者:Minoru Genta；Yoshitaka Kimura；Yoshio Kuromi；Hideo Suzuki；Seiichi Terakura
    申请人:Mitsubishi Power Environmental Solutions Ltd；
    IPC主号:B09B3-00
    专利说明:
    Docket No. PMHA-14018-PCT 1 DESCRIPTION BIOMASS PROCESSING SYSTEM, SACCHARIDE SOLUTION PRODUCTION METHOD USING BIOMASS FEEDSTOCK, ALCOHOL PRODUCTION METHOD Field 5 [0001] The present invent ion relates to a biomass processing system capable of efficiently decomposing biomass feedstock, a saccharine solution production method using biomass feedstock, and an alcohol production method. Background 10 [0002] In the related art, there has been put into practice a technique of producing ethanol and the like, in which biomass such as wood is subjected to saccharification processing using dilute sulfuric acid and concentrated sulfuric acid and then subjected to solid-liquid separation, 15 and a liquid phase is neutralized to be utilized as feedstock for ethanol fermentation and the like (Patent Literature 1, Patent Literature 2), Furthermore, chemical industrial material production (for example, lactic acid fermentation) using saccharide as 20 starting feedstock may also be considered. Here, the biomass refers to organisms incorporated into the substance circulation system of the earth biosphere, or accumulation of organic materials derived from the organisms (see UIS K 3600 1258). 25 [0003] Here, sugar cane, corn, and the like currently used as alcohol material are originally provided as food, and it is not preferable to use such edible resources as industrial application resources for a long period of time in a stable manner from the perspective of life cycles of 30 useful foodstuffs. [0004] For this reason, it is an important problem to effectively make use of cellulose resources such as herbaceous biomass and woody biomass which are considered Docket No. PMHA-14018-PCT 2 to be useful resources in the future. [0005] Furthermore, in the cellulose resources, cellulose is 38 to 50%, and a hemicellulose component is 23 to 32%, which vary, and a lignin component not serving as 5 fermentation feedstockx is 15 to 22%, which also varies. Since this is an industrialization study involving many problems, feedstock is considered in a fixed manner, and currently, there has not yet been made any disclosure of a technique of a production system based on consideration of 10 the versatility of feedstock. [0006] Further, originally an aim is considered to cope witn waste problem and prevent global warming using feedstock which is more disadvantageous for fermentation feedstock than starch feedstock, and therefore, a 15 production system based on a fixed notion of feedstock is less meaningful. The production system needs to be applicable to a wide range of wastes in general. Currently, an enzymatic saccharification method itself has too low efficiency and is regarded as a future problem. The 20 saccharification rate by acid treatment is a very small value on the order of about 75% (based on components that can be saccharified) because of excessive decomposition of saccharide due to overreaction. Therefore, for the cellulose resources, the ethanol production yield stays at 25 about 25% (Patent Literature 3). [0007] It is noted that in the techni ques in the related art of Patent Literatures 1 to 3, side-reaction products have caused enzymatic saccharification inhibition, and tnere occurs a phenomenon that the saccharide yield 30 decreases, and therefore, a hydr-olysis apparatus that removes an enzymatic saccharification inhibition substance and enhances enzymatic saccharification performance for mainly cellulose has been proposed previously (Patent Docket No. PMHA-14018-PCT 3 Literature 4 to 7) . Citation List Patent Literature [0008] Patent Literature 1: Japanese PCT National 5 Publication No. H-1-507386 Patent Literature 2: Japanese PCT National Publication No. H11-506934 Patent Literature 3: Japanese Patent Laid-open No. 2005-168335 10 Patent Literature 4: Japanese Patent Laid-open No. 2009-183805 Patent Literature 5: Japanese Patent Laid-open No. 2009-183154 Patent Literature 6: Japanese Patent No. 4764527 15 Patent Literature 7: Japanese Patent No. 4764528 Summary Technical Problem [0009] In the proposition of the hydrolysis apparatus in the Patent Literature 6 mentioned above, water is provided 20 from the outside when slurring is performed in a slurring vessel 1, and therefore, the water usage amount in the entire plant increases, and there is such a problem that the cost effectiveness of the plant deter orates. [0010] In the proposition of the hydrolysis apparatus in 25 the Patent Literature 7 mentioned above, a slurry biomass solid content subjected to slurrying in a slurrying vessel and a hot water discharge liquid are saccharified in different lines, and therefore, the line needs to be of two systems, and there is such a problem that the plant 30 equipment becomes complex and also the cost effectiveness deteriorates. [0011] The present invention is made in view of the above problems, and provides a biomass processing system Docket No. PMHA-14018-PCT having improved plant efficiency, a saccharide solution production method using biomass feedstock, and an alcohol production method. Solution to Problem 5 [0012] According to a first aspect of. the present invention in order to solve the above problems, there is provided a biomass processing system including: a hydrolysis processing unit that decomposes, under a high temperature/high-pressure condition, biomass feedstock 10 including cellulose, hemicellulose, and lignin in a processing tank having a gas-liquid interface, and removes a lignin component and a hemicellulose component; a biomass solid content discharge unit that discharges the biomass solid content which is a hot water iinsoluble element 15 processed by the hydrolysis processing unit; a slurrying vessel that is in communication with the biomass solid content discharge unit and that subjects the discharged biomass solid content to slurrying; and a discharge liquid introducing line that introduces, into the slurrying vessel, 20 a hot water discharge liquid including a biomass hot-water soluble element discharged from the hydrolysis processing unit, wherein the biomass solid content is mixed with the discharge liquid to be made into mixture slurry. [0013] According to a second aspect of the present 25 invention, there is provided the biomass processing system according to the first aspect, wherein a fil ter is interposed on the discharge liquid introducing line. [0014] According to a third aspect of the present invention, there is provided the biomass processing system 30 according to the first or second aspect, wherein cooling means is interposed on the discharge liquid introducing line. [0015] According to a fourth aspect of the present Docket No. PMHA-14018-PCT 5 invent ion, there is provided the biomass processing system according to any one of the first to third aspects, including a saccharification tank that saccharifies the mixture slurry subjected to the scurrying in the slurryinq 5 vessel. [0016] According to a fifth aspect of the present invention, there is provided the biomass processing system according to the fourth aspect, including: a solid-liquid separation device that separates a solid element from a 10 saccharide solution saccharified by the saccharification tank; and a moisture separation device that removes water from the saccharide solution from which the solid element has been separated. [0017] According to a sixth aspect of the present 15 invention, there is provided the biomass processing system according to the fifth aspect, including a water return line that returns water separated from the moisture separation device back to the slurrying vessel. [0018] According to a seventh aspect of the present 20 invention, there is provided the biomass processing system according to the sixth aspect, including an organism processing apparatus in the water return line. [0019] According to an eighth aspect of the present invention, there is provided a saccharide solution 25 production method using biomass feedstock, including: providing the biomass feedstock including cellulose, hemicellulose, and liQnin from a normal pressure state to a pressurized state, and performing hydrolysis processing by a hydrolysis processing unit on the biomass feedstock under 30 a high-- temperature/hiqh-pres sure condition; and subsequently, charging a biomass solid content discharged from the biomass processing unit into a slurrying vessel into which water has been poured and which is in Docket No. PMHA-14018-PCT communication with the biomass processing unit, and making the biomass solid content into a slurry biomass solid content; and subjecting the slurry biomass solid content to enzymatic saccharification to obtain a saccharide solution, 5 thereafter separating a solid content, and then removing water, wherein a hot water discharge liquid including a biomass hot-water soluble element discharged from the hydrolysis processing unit is charged into the slurryinq vessel and subjected to slurrying to be made into a mixture 10 slurry. [0020] According to a ninth aspect of the present invention, there is provided the saccharide solution production method using biomass feedstock according to the eighth aspect, wherein impurity in the discharge liquid 15 discharged from the hydrolysis processing unit is removed. [0021] According to a tentn aspect of the present invention, there is provided an alcohol production method, wherein a saccharide solution obtained by the saccharine solution production method using biomass feedstock 20 according to any one of claims 8 to 9 is used to perform alcohol fermentation and alcohol is produced. Advantageous Effects of Invention [0022] According to the present invention, the amount of water introduced when slurrying processing is performed is 25 greatly reduced, and therefore the plant efficiency can be improved. Brief Description of Drawings [0023] FIG. 1 is a schematic diagram of a biomass processing system according to a first embodiment. 30 FIG. 2 is a schematic diagram of the biomass processing system according to the first embodiment. FIG. 3 is a schematic diagram of the biomass processing system according to the first embodiment.
    Docket No. PMHA-14018-PCT FIG. 4 is a schematic diagram of a biomass processing system according to a second embodiment. FIG. 5 is a schematic diagram of a biomass processing system according to a third embodiment, 5 FIG, 6 is a schematic diagram of a biomass processing system according to a fourth embodiment. FIG. 7 is a schematic diagram of a biomass processing system according to a fifth embodiment. Description of Embodiments 10 [0024] Preferred embodiments of a biomass processing system according to the present invention will be hereinafter explained in detail with reference to appended drawings, it is noted that the present invention is not limited by the embodiments, and when there are multiple 15 embodiments, an embodiment including a combination of the embodiments is also included. [First embodiment [0025] A biomass processing system according to the present invention will be explained with reference to 20 drawings. FIG, 1 is a schematic diagram of the biomass processing system according to the first embodiment. As illustrated in FIG. 1, a biomass processing system 10A according to the present embodiment includes a 25 hydrolysis processing unit 17 which is a biomass processing unit that decomposes cellulose, hemicellulose, and lignin from biomass feedstock 11 under a high-temperature/high pressure condition in an apparatus main body 13 which is a processing tank having a gas-liquid interface 13a and that 30 removes a lignin component and a hemicellulose component, a biomass solid content discharge unit :18 that discharges a biomass solid content 20 which is a hot water insoluble element processed by the hydrolysis processing unit 17, a Docket No. PMHA-14018-PCT slurrying vessel 21 that is in communication with the biomass solid content discharge unit 18 and that subjects a biomass solid content to slurrying by introducing the discharged biomass solid content 20, a discharge unit 23 5 that discharges the slurry biomass solid content from a pressurized state to a normal pressure state, and a hot water discharge liquid introducing line L2 that introduces, into the slurrying vessel 21, a hot water discharge liquid 16 including a biomass hot-water soluble element discharged 10 from the hydrolysis processing unit 17. [0026] The hydrolysis processing unit 17 includes a biomass providing unit 12 that provides the biomass feedstock 11 including cellulose, hemicellulose, and liqnin from the normal pressure state to the pressurized state. 15 Then, in the hydrolysis processing unit 17, the provided biomass feedstock 11 is conveyed from the lower side to the upper side by first screw means 14 servings as conveying means inside the apparatus main body 13, and also pressurized hot water (which may be hereinafter also 20 referred to as "hot water") 15 is provided into the apparatus main body 13 from the upper side different from a portion where the biomass feedstock 11 is provided, the biomass feedstock 11 and the pressurized hot water 15 are subjected to hydrolysis while being brought into 25 countercurrent contact, a hot water dissolved component (a soluble element such as a lignin component and a hemicellulose component) is transferred into the hot water discharge liquid 16 which is pressurized hot water to be discharged, and the lignin component, the hemicellulose 30 component, and the like are separated from the biomass feedstock 11. Here, the screw means is exemplified as the conveying means in the present embodiment; however, the conveying Docket No. PMHA-14018-PCT 9 means is not limited to the screw means as long as it can convey the biomass solid content from the lower side to the upper side. [0027] The discharge liquid 16 including the biomass 5 hot-water soluble element is introduced into the slurrying vessel 21, so that this can eliminate the necessity of water 19, which is required in the slurrying vessel 21 and is charged from the outside. [0028] It is noted that when water is required in 10 scurrying, a minimum required amount of the water 19 may be introduced from the outside as illustrated in FI.i 2. [0029] In order to suppress excessive decomposition (a decomposition start temperature of about 140 0 C to 1800C) of hemicellulose included in the moisture contained in the 15 biomass solid content 20, the temperature of the discharge liquid 16 to be introduced according to the temperature of the bi omass solid content 20 or the capacity of the scurrying vessel 21 may be set appropriately by cooling with not-illustrated cooling means, as necessary, so that 20 the liquid temperature of the slurring vessel 21 is cooled to 140oC or less, [0030] In the present embodiment, the biomass solid content 20 which is the hot water insoluble element that becomes a hexose feedstock is dropped into the discharge 25 liquid 16 including the biomass hot-water soluble element that becomes pentose feedstock , to be made into mixture slurry 24. Thus, a saccharification step can be achieved in a single line. Here, in FIG. 1 reference character 18a denotes a 30 passage communicating between the biomass solid content discharge unit 18 and the slurrying vessel 21, reference character 22 denotes agitation means that agitates the inside of the slurrying vessel 21, reference character 13a Docket No. PMHA-14018-PCT 10 denotes a gas-liquid interface of the apparatus main body 13, reference character 21a denotes a gas-liquid interface of the slurrying vessel 21, reference character Li denotes a discharge line of the mixture slurry 24, refe-rce 5 character Mi denotes a motor that drives the first screw means 14, and reference character M 2 denotes a motor that drives the agitation means 22. [0031] In FIG, 1, the biomass solid content discharge unit 18 is provided with not-illustrated second screw means, 10 and the biomass solid content 20 which is the hot water insoluble element conveyed from the lower side to the upper side by the first screw means 14 is being discharged to the slurrying vessel 21 side. Then, the discharged biomass solid content 20 sequentially drops from the passage 18a 15 into the hot water discharge liquid 16, and is subjected to slurring by agitation of the agitation means 22 provided wi tin the slurrying vessel 21, and made into the mixture slurry 24. [0032] Furthermore, the biomass solid content 20 dropped 20 into the liquid in the slurrying vessel 21 is cooled by direct thermal exchange with the liquid, and as a result, excessive decomposition of the remaining hemicellulose, the remaining lignin, and the main component cellulose due to the hot water accompanied by the biomass solid content 20 25 is suppressed. [0033] This is because in the gas atmosphere at the upper side of the gas-liquid interface 1.3a of the hydrolysis processing unit 17, the biomass solid content 20 is exposed above the not water liquid surface (gas-liquid 30 interface 13a) by the first screw means 14. However, due to the existence of the pressurized hot water 15 accompanied by the biomass solid content 20, the reaction still proceeds in the high -temperature/high-pressure state, Docket No. PMHA-14018-PCT 11 and therefore, the reaction can be stopped by charging the biomass solid content 20 into the liquid in the slurrying vessel 21. [0034] Tlerefore, this reaction stoppage suppresses the 5 excessive decomposition of the remaining hemicellulose, the remaining lignin, and the main component cellulose, and while the excessive decomposition of the cellulose component is suppressed and the recovery rate thereof is improved, generat ion of a reaction inhibition component in 10 the downstream side is suppressed. [0035] In addition, since the slurry liquid exists in the scurrying vessel 21, the liquid sealing is made at the gas-liquid interface 1a of the hydrolysis processing unit :17 and the gas-liquid interface 21a off the slurrying vessel 15 21, and this prevents leakage of pressurized nitrogen 25 which is gas for pressurization. Thus, the loss associated with the gas leakage is eliminated, and the running cost for the gas for pressurization can be greatly reduced. It is noted that in the slurrying vessel 21, there are 20 provided a safety valve and an inlet passage of the pressurized nitrogen 25, which are not illustrated. [0036] In addition, the biomass solid content 20 is subjected to the slurrying with the discharge liquid 16 including the biomass hot-water soluble element, whereby 25 fluidization becomes possible, and a discharge mechanism used in discharging to the outside from the slurrying vessel 21 become simple. In other words, if the biomass solid content 20 is still at a high-temperature state, the material of the discharge mechanism also needs to be, for 30 example, an expensive material, but since the biomass solid content is cooled in the slurrying vessel 21, for the material of the discharge unit 23 provided at the discharge side thereof, inexpensive stainless, resin, or the like can Docket No. PMHA-14018-PCT 12 be used. As this discharge unit 23, for example, a rotary feeder, a flow regulating valve, or the like can be used. [0037] In addition, although the biomass solid content 20 has a high void ratio and a low bulk density and thus 5 the handling in the solid state has been troublesome, the volume reduction can be achieved by slurrying, and the handling also becomes easy. In other words, before the biomass solid content 20 is added to the liquid, the biomass solid content 20 is in a 10 so-called cake form, and has a high rate of the gas for pressurization, a high void ratio, and a bulk density as low as 0.5 g/cc or less. However, when the biomass solid content 20 is subjected to slurrying, the void ratio decreases, and the volume reduction can be achieved. 15 [0038] Further, the biomass solid content 20 is subjected to the slurrying with the discharge liquid 16 including the biomass hot--water soluble element, whereby fluidization becomes possible, and the handling in the subsequent saccnarification step becomes easy. 20 in particular, in the saccharification processing and the like, it is necessary to cool to a predetermined temperature or less (f-or example, 60cC or less) because there is enzyme reaction. in this case, cooling in the state of the biomass solid content 20 is not favorable in 25 terms of the heat exchange efficiency thereof, and therefore, large scale heat exchange means Is required, but by subjecting the biomass solid content 20 to scurrying, the cooling efficiency becomes favorable, and the large scale heat exchange means becomes unnecessary. 30 [0039] Furthermore, indirect cooling means for cooling the inside of the scurrying vessel 21 may be provided. Furthermore, although the slurrying vessel 21 is provided with the agitation means 22, the present invention Docket No. PMHA-14018-PCT 13 is not limited thereto, and for example, the agitation can be carried out by using circulation means with a pump. [0040] Here, the biomass provided to the hydrolysis processing uni t 17 is not particular early limited, and refers 5 to organisms incorporated into the substance circulation system of the earth biosphere, or accumulation of organic materials derived from the organisms (see JIS K 3600 1258), but in the present invention, in particular, cellulose resources such as woody, for example, hardwood resources 10 and herbaceous resources, and agricultural waste, food waste, and the like are preferably used. [0041] Furthermore, as for the biomass feedstock 11, the particle diameter is not particularly limited, but the biomass feedstock 11 is preferably milled to 5 mm or less. 15 In the present embodiment, before the biomass is provided, for example, preprocessing may be performed by using a mill as a preprocessing apparatus. Furthermore, washing may be performed by a washing apparatus. It is noted that when the biomass feedstock 11 is, for 20 example, hulls and the like, the biomass feedstock 11 can be provided to the biomass providing unit 12 directly without milling. [0042] Furthermore, the reaction temperature in the hydrolysis processing unit 17 is preferably in the range of 25 180 to 240oC. More preferably, the reaction temperature is 200 to 230oC, This is because at a low temperature of less than 180oC, the hydrolysis speed is low, and it takes a long time for decomposition, leading to increasing in size of an 30 apparatus, which is not preferable. On the other hand, at a temperature of more than 2400C, the decomposition speed is too high, and the cellulose component changes from the solid state to the liquid state more greatly, and also the Docket No. PMHA-14018-PCT 14 excessive decomposition of. hemicellulose saccharide is promoted, which is not preferable. Furthermore, the hemicellulose component begins to dissolve from about 1400C, the cellulose begins to dissolve 5 from about 230CC, and the lignin component begins to dissolve from about 140oC; however, the range of 180oC to 2400C is preferable in which the cellulose stays at the solid content side, and the hemicellulose component and the lignrin component have a sufficient decompose tion speed. 10 [0043] The reaction pressure is preferably a pressure obtained by adding 0.1 to 0.5 MPa to the saturation vapor pressure of water at each of the reaction temperatures (180 to 240oC) of the apparatus main body 13 Furthermore, the reaction time is preferably 20 15 minutes or less, 3 to 10 minutes. This is because when the reaction is performed for a too long time, a rate of an excessively decomposed product increases, which is not preferable. [0044] Examples of the biomass providing unit 12 that 20 provides the biomass feedstock 11 from the normal pressure state to the pressurized state include means such as a screw, a piston pump, or a slurry pump, [0045] Furthermore, although in the present embodiment, the hydrolysis apparatus is a vertical type apparatus, the 25 present invention is not limited thereto, and the hydrolysis apparatus may be an inclined type hydrolysis apparatus having the gas-liquid interface 13a. [0046] Here, the reason why the hydrolysis apparatus is tne inclined type or the vertical type is that gas 30 generated in the hydrolysis reaction, gas brought into the feedstock, and the like can be quickly released from the upper side, which is preferable. Moreover, since a decomposed product is extracted with the pressurized not Docket No. PMHA-14018-PCT 15 water 15, the concentration of an extract increases from the upper side to the lower side, which is preferable in terms of extraction efficiency. [0047] Next , a saccharification/saccharide--concentrating 5 apparatus 50 using the mixture slurry 24 to perform enzymatic saccharification and concentrate saccharide will be explained with reference to FIG. 3. [0048] As illustrated in FIG. 3, this saccharification/sacc ide-concentrting apparatus 50 10 includes a saccharification tank 52 that subjects the mixture slurry 24 to enzymatic sacchari fication with an enzyme 51, a solid-liquid separation device 54 that separates a solid element from a saccharine solution 53 after the saccharification, and a moisture separation 15 device 56 that is provided with a reverse osmosis (RO) membrane 56a and that removes water 57 from the saccharide solution 53 separated by the solid-liquid separation device 54 to obtain a concentrating saccharine solution 55. [0049] The solid-liquid separation device 54 may use, 20 for example, a screw decanter, a sand filtration device, an MF membrane, or the like alone or a combination thereof and thereby removes a solid material so that the RO membrane 56a can be protected. Further, in the prior stage side of the RO membrane 56a, an ultrafiltration membrane (UF 25 membrane) is used to protect the RO membrane, and at the same time, enable e recovery of an enzyme, so that the enzyme can be reused. [0050] Furthermore, the moisture separation device 56 may use a loose RO membrane, a nanofiltration membrane (NF 30 membrane) , and the like. [0051] Next, a procedure of processing steps of this saccharificati on/sac charide-concentrating apparatus 50 will be explained.
    Docket No. PMHA-14018-PCT 16 The mixture slurry 24: is a mixture of. the biomass solid content 20 which is a hot water insoluble element that becomes nexose feedstock, and the discharge liquid 16 including a biomass hot-water soluble element that becomes 5 pent ose feedstock, and therefore, C6 saccharification and C5 saccharification proceed in the same line. [0052] <Enzymatic saccharification step> First, in the saccharification tank 52, the mixed liquid slurry 24 is introduced via the discharge line L 1 , 10 the enzyme 51 is added, and the saccharification with the enzyme reaction is performed in the enzymatic saccharification step. [0053] <Solid-liquid separation step> Next, the saccharine solution 53 is stored in a first 15 saccharide solution tank 61, subsequently, a solid residual liquid 62 such as lignin is separated by the solid-liquid separation device 54, and subsequently, the saccharide solution 53 is stored in a second saccharide solution tank 63. In the figure, reference characters L 3 and L 4 denote 20 saccharide solution providing lines providing the saccharide solution 53. [0054] <Saccaride--concentrating step> Next, the water 57 is removed from the saccharide solution 53 by the moisture separation device 56 provided 25 with the RO membrane 56a to obtain the concentrating saccharide solution 55. This concentrating saccharide solution 55 is made into various kinds of organic feedstock in fermentation processing in a not-illustrated subsequent step. 30 [0055] In the present embodiment, the mixture slurry 24 is used to perform the saccharification, and therefore, saccharification at a low substrate concentration is provided, and high-speed saccharification becomes possible.
    Docket No. PMHA-14018-PCT 17 Furthermore, since e slurry is used, agitation/transfer and the like can be performed with high operationality. Furthermore, since the saccharification at a low substrate concentration is provided, the enzyme usage 5 amount can be reduced. Furthermore, the saccharide can be concentrated efficiently by the membrane processing using various kinds of membranes Furthermore, since the solid residual liquid 62 such 10 as lianin thus separated has a high calorie, the solid residual liquid 62 can be used for fuel and the like. Furthermore, the solid residual liquid 62 such as lignin can be used for organic fertilizer application and chemical feedstock application (application as an adhesive agent of 15 lignin and the like). [0056] As described above, a saccharide solution production method using biomass feedstock of the present invention can efficiently produce a saccharide solution from biomass feedstock by providing the biomass feedstock 20 11 including cellulose, hemicellulose, and lignin from a normal pressure state to a pressurized state, subjecting the biomass feedstock 11 to hydrolysis by the hydrolysis processing unit 17 using the pressurized hot water 15, dissolving a lignin component and a hemicellulose component 25 in the pressurized hot water 15, subsequently, charging the biomass solid content 20 discharged from the hydrolysis processing unit 17 into the slurrying vessel 21 which is in communication with the hydrolysis processing unit 17 and into which the discharge liquid 16 has been introduced, 30 making the biomass solid content 20 into the mixture slurry 24, subjecting the mixture slurry 24 to enzymatic saccharification to obtain the sac charide solution 53, thereafter, separating a solid content, and then removing Docket No. PMHA-14018-PCT 18 water, as illustrated. in FIG. 2. [0057] In the present embodiment, in the slurrying, the discharge liquid 16 is used, so that introduction of water from the outsi de can be eliminated, and therefore, the 5 saccharification concept ration can be increased., for example, from 1.5 wt% to 8 wt%. As a result, a saccharide solution concentrating device to be installed at a later staqe side becomes unnecessary, or the size of the saccharide solution concentrating device can be reduced. 10 [0058] As described above, according to the present embodiment, the cellulose-based component and. the hemicellulose component are decomposed in the solid-liquid contact state from the biomass feedstock, and thereafter, the biomass solid. content which is a decomposed prod-uct 15 thereof is charged into the liquid poured into the slurrying vessel 21 and thus subjected to the slurrying, and also the liquid sealing is made so that the effluence of pressurized gas can be prevented.. This prevents the effluence of the gas for pressurization (for example, the 20 pressurized nitrogen) , and can greatly reduce the running cost, [0059] As described above, according to the present embodiment, in the slurrying, the hot water discharge liquid is used without providing water from the outside, 25 and therefore, the amount of consumption of water in the ent ire plant can be greatly reduced, and the cost can be reduced. In addition, the saccharification is performed using tne mixture slurry 24 in which the slurry biomass solid 30 content that becomes hexose feedstock and the hot water discharge liquid that becomes pentose feedstock are mixed, and therefore, the saccnaride concentration can be increased.
    Docket No. PMHA-14018-PCT 19 [0060] Furthermore, the saccharification is performed using the mixture slurry 24 in which the slurry biomass solid content that becomes hexose feedstock, and the hot water discharge liquid that becomes pentose feedstock are 5 mixed, and therefore, the enzyme usage amount in the saccharification can be reduced, and the cost of enzyme usage can be reduced. [0061] Furthermore, the saccharification is performed using the mixture slurry 24 in which the slurry biomass 10 solid content that becomes hexose feedstock, and the hot water discharge liquid that becomes pentose feedstock are mixed, and therefore, the saccharification line can be a single line of one system, instead of two systems as in the related art, the enzymatic saccharification step becomes 15 simple, and the equipment cost and the running cost can be reduced. [0062] Furthermore, since the amount of consumption of water can be reduced, the amount of generation of waste liquid can be reduced, and the cost of disposal of the 20 waste liquid can be reduced. [Second embodiment] [0063] Next, another embodiment of a biomass processing system according to the present invention will be explained with reference to drawings. It is to be noted that the 25 same members as those of the biomass processing system of the first embodiment are denoted with the same reference characters, and description thereof is omitted. FIG. 4 is a schematic diagram illustrating a biomass processing system according to a second embodiment. 30 As illustrated in FIG, 4, a biomass processing system 10B has a filter 71 provided in the hot water discharge liquid introducing line L2 in the biomass processing system 10A of the first embodiment. This filter 71 is installed Docket No. PMHA-14018-PCT 2 0 so that the solid content such as lignin in a discharge liquid 16 can be separated. This can prevent the saccharification inhibition caused by lignin. [Third embodiment 5 [0064] Next, another embodiment of a biomass processing system according to the present invention will be explained with reference to drawings. It is noted that the same members as those of the biomass processing system of the first embodiment are denoted with the same reference 10 characters, and description thereof is omitted. FIG. 5 is a schematic diagram illustrating a biomass processing system according to a third embodiment. As illustrated in FIG. 5, a biomass processing system 1C has an ion exchange membrane filter 72 provided in the 15 discharge liquid line L 3 in the biomass processing system 10A of the first embodiment. This ion exchange membrane filter 72 is installed so that an acid substance dissolved in a discharge liquid 16 can be removed by the ion exchange. This can prevent the saccharification inhibition caused by 20 an acid substance. [Fourth embodiment] [0065] Next, another embodiment of a biomass processing system according to the present invention will be explained with reference to drawings. It is noted that the same 25 members as those of the biomass processing system of the first embodiment are denoted with the same reference characters, and description thereof is omitted. FIG. 6 is a schematic diagram illustrating a biomass processing system according to a fourth embodiment. 30 As illustrated in FIG. 6, a biomass processing system 10D further has a water return line L that returns water 57 separated from the moisture separation device 56 back to the scurrying vessel 21 in the biomass processing system Docket No. PMHA-14018-PCT 21 c10 of the third embodiment. Furthermore, in this water return line is, a cooling device 60 is inte-posed, so that after water 57 is cooled to a predetermined temperature, the water 57 can be 5 returned back to the slurrying vessel 21. [0066] Therefore, the separated water 57 can be reused, and stoppage of use or the reduced usage amount of water 19 to be provided to the slurrying vessel 21 can be achieved. [Fifth embodiment] 10 [0067] Next, another embodiment of a biomass processing system according to the present invention will be explained with reference to drawings. TIt is noted that the same members as those of the biomass processing system of the first embodiment are denoted with the same reference 15 characters, and description thereof is omitted. FIG. 7 is a schematic diagram illustrating a biomass processing system according to a fifth embodiment. As illustrated in FIG. 7, a biomass processing system 10E further has an organism processing apparatus 61 20 provided in the water return line L, in the biomass processing system 10D of the fourth embodiment, so that after water 57 is subjected to organism processing, the water 57 can be returned back to a slurrying vessel 21. [0068] The water 57 separated by an RO membrane 56a in a 25 saccharide-concentrating step includes a reaction inhibition substance (low molecule organic compound) , and therefore, the water 57 can be easily processed by the organism processing apparatus 61. Then, for example, a methane fermentation organism processing apparatus is used 30 as the orqani sm processing apparatus to recover methane, and the methane can be utilized for fue. and the like. [0069] As described above, according to the biomass processing system of the present inventi-on, a cellulose- Docket No. PMHA-14018-PCT 22 based component and a hemicellulose component are decomposed in a high-temperature/high-pressure condition from biomass feedstock, and thereafter, a biomass solid content which is a decomposed product thereof is charged 5 into a liquid into which a discharge liquid 16 provided inside the slurrying vessel is introduced, and thus subjected to slurrying, and also the liquid sealing is made so that the effluence of pressurized gas can be prevented. This prevents the effluence or gas for pressurization (for 10 example, pressurized nitrogen) , and can greatly reduce the running cost. [0070] Furthermore, a biomass solid material is made into slurry with the discharge liquid 16 to be made into mixture slurry 24, and thus makes handling thereof easy and 15 becomes more suitable for a subsequent saccharification step, so that the saccharide solution can be produced eff icien ty. Furthermore, based on this saccharide solution, various kinds of organic feedstock (for example, alcohols, substitutes for petroleum, or amino acids) can be 20 produced efficiently. Furthermore, based on this saccharide solution, various kinds of organic feedstock (for example, alcohols, substitutes for petroleum, or amino acids) can be produced efficiently, such as LPG, automobile fuel, aircraft jet fuel, kerosene, diesel oil, various 25 kinds of heavy oils, fuel gas, naphtha, ethylene glycol which is a naphtha decomposed product, lactic acid, alcohol (such as ethanol) , amine, alcohol ethoxylates, vinyl chloride polymers, alkyl aluminum, PVA, vinyl acetate emulsion, polystyrene, polyethylene, polypropylene, 30 polycarbonate, MMA resins, nyl on, and polyester. Therefore, the biomass-derived saccharide solution can be efficiently utilized as a substitute for a chemical product derived from petroleum which is exhaustible fuel and as the Docket No. PMHA-14018-PCT 23 material for producing such a substitute. [0071] Further, since the biomass solid content is charged into the liquid, the reaction can be stopped efficiently by cooling the biomass solid content by means 5 of direct heat exchange using the liquid, and in addition, since an acid and an alkali are diluted, excessive decomposition of the remaining hemicellulose, the remaining lignin, and the main component cellulose accompanied by the biomass solid content can be suppressed. As a result, 10 generation of a reaction inhibition component can be suppressed, and in addition, the recovery rate of the cellulose component can be improved. Reference Signs List [0072] 10A to 10E BIOMASS PROCESSING SYSTEM 15 11 BIOMASS FEEDSTOCK 12 BIOMASS PROVIDING UNIT 13 APPARATUS MAIN BODY 14 FIRST SCREW MEANS 15 PRESSURIZED HOT WATER 20 16 HOT WATER DISCHARGE LIQUID 17 HYDROLYSIS PROCESSING UNIT 18 BIOMASS SOLID CONTENT DISCHARGE UNIT 19 WATER 20 BIOMASS SOLID CONTENT 25 21 SLURRYING VESSEL 22 AGITATION MEANS 23 DISCHARGE UNIT 24 MIXTURE SLURRY 25 PRESSURIZED NITROGEN 30 50 SACCHARIFICATION/SACCHARIDE-CONCENTRATING
    APPARATUS
    权利要求:
    Claims (5)
    [1] 1. A biomass processing system comprising: a hydrolysis processing unit that decomposes, under a high-temperature/high-pressure condition, biomass feedstock 5 including cellulose, hemicellulose, and lignin in a processing tank having a cas-liquid interface, and removes a lignin component and a hlemicellulose component; a biomass solid content discharge unit that discharges the bi mass solid content which is a hot water insoluble 10 element processed by the hydrolysis processing unit; a slurrying vessel that is in communication with the biomass solid content discharge unit and that subjects the discharged biomass solid content to scurrying; and a discnarge liquid introducing line that introduces, 15 into the slurring vessel, a hot water discharge liquid including a biomass hot-water soluble element discharged from the hydrolysis processing unit, wherein the biomass solid content is mixed with the discharge liquid to be made into mixture slurry. 20 2 he biomass processing system according to claim 1, wherein a filter is interposed on the discharge liquid introducing line. 25 3. The biomass processing system according to claim 1 or 2, wherein cooling means is interposed on the discharge liquid introducing line.
    [2] 4. The biomass processing system according to any one of 30 claims 1 to 3, comprising a saccharification tank that saccharifies the mixture slurry subjected to the slurrying in the slurrying vessel. Docket No. PMHA-14018-PCT 25
    [3] 5. The biomass processing system according to claim 4, comprising: a solid-liquid separation device that separates a solid element from a saccharide solution saccharified by 5 the saccharification tank; and a moisture separation device that removes water from the saccharide solution from which the solid element has been separated. 10 6. The biomass processing system according to claim 5, comprising a water return line that returns water separated from the moisture separation device back to the slurrying vessel. 15 7. The biomass processing system according to claim 6, comprising an organism processing apparatus in the water return line.
    [4] 8. A saccharide solution production method using biomass 20 feedstock, comprising: providing the biomass feedstock including cellulose, hemicellulose, and liqnin from a normal pressure state to a pressurized state, and performing hydrolysis processing by a hydrolysis processing unit on the biomass feedstock under 25 a high-temperature/high-pressure condition; and subsequently, charging a biomass solid content discharged from the biomass processing unit into a slurrying vessel into which water has been poured and which is in communication with the biomass processing unit, and 30 making the biomass solid content into a slurry biomass solid content; and subjecting the slurry biomass solid content to enzymatic saccharification to obtain a saccnaride solution, Docket No. PMHA-14018-PCT 26 thereafter separating a solid content, and then removing water, wherein a hot water discharge liquid including a biomass hot-water soluble element discharged from the 5 hydrolysis processing unit is charged into the scurrying vessel and subjected to scurrying to be made into a mixture slurry.
    [5] 9. The saccharide solution production method using 10 biomass feedstock according to claim 8, wherein impurity in the discharge liquid discharged from the hydrolysis processing unit is removed. :10. An alcohol production method, wherein a saccharide 15 solution obtained by the saccharide solution production method using biomass feedstock according to any one of claims 8 to 9 is used to perform alcohol fermentation and alcohol is produced.
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    同族专利:
    公开号 | 公开日
    JPWO2013145236A1|2015-08-03|
    BR112014021043B1|2021-08-03|
    JP5425348B1|2014-02-26|
    CA2868572C|2015-04-28|
    US9315840B2|2016-04-19|
    US20150044729A1|2015-02-12|
    WO2013145236A1|2013-10-03|
    BR112014021043A2|2017-06-20|
    CA2868572A1|2013-10-03|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2016-07-28| PC1| Assignment before grant (sect. 113)|Owner name: MITSUBISHI HITACHI POWER SYSTEMS ENVIRONMENTAL SOL Free format text: FORMER APPLICANT(S): MITSUBISHI HEAVY INDUSTRIES MECHATRONICS SYSTEMS, LTD. |
    2016-10-06| FGA| Letters patent sealed or granted (standard patent)|
    2021-03-04| HB| Alteration of name in register|Owner name: MITSUBISHI POWER ENVIRONMENTAL SOLUTIONS, LTD. Free format text: FORMER NAME(S): MITSUBISHI HITACHI POWER SYSTEMS ENVIRONMENTAL SOLUTIONS, LTD. |
    优先权:
    申请号 | 申请日 | 专利标题
    PCT/JP2012/058460|WO2013145236A1|2012-03-29|2012-03-29|Biomass processing system, sugar solution production method using biomass starting material, and method for producing alcohol|
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