A method and an apparatus for treating plant based raw material with an enzymatic hydrolysis

Abstract

The invention relates to a method and an apparatus for treating plant based raw material with an enzymatic hy-dro- lysis, in which theplant based raw material (1) is treated to form lignocellulosic material (3a,3b) and the lignocellulosic material (3a,3b) or its fraction (10) is conducted into the enzymatic hydrolysis (4), wherein the method comprises at least one treatment stage (2a,2b,2c) in which the plant based raw material (1) is treated so that the lignocellulosic material (3a,3b) contains over 80 % fine sol- id particles which are fiber-like or indefinable particles smaller than 0.2 mm, defined by an optical measurement device, the lignocel- lulosic material (3a,3b) orat least one fraction (10) of the lignocellulosic material is supplied into the enzymatic hydrolysis (4) for forming a lignin based material (5), andat least one solid-liquid sepa- ration stage(6) after the enzymatic hydrolysis (4) in which a lignin fraction (7) and a soluble carbohydrate containing fraction (8) are separated. Further, the in-vention relates to the soluble car- bohydrate containing fraction, the ligninfraction, the lignin based materi- al, the liquid fraction and the solid fraction, and theiruses.

Description

A METHOD AND AN APPARATUS FOR TREATING PLANT BASED RAW MATERIAL WITH AN ENZYMATIC HYDROLYSIS FIELD OF THE INVENTION The invention relates to a method and an appa- ratus for treating plant based raw material with an en- zymatic hydrolysis. Further, the invention relates to a soluble carbohydrate containing fraction and its use. Further, the invention relates to a lignin fraction and its use. BACKGROUND OF THE INVENTION Known from prior art is different methods for forming carbohydrates and lignin from different raw ma- terials, such as biomass. Many bio-refinery processes, e.g. hydrolysis, generate lignin and sugars after the treatment of the biomass. OBJECTIVE OF THE INVENTION The objective of the invention is to disclose a new method for producing a lignin fraction and a sol- uble carbohydrate containing fraction. Another objec- tive of the invention is to produce a pure lignin frac- tion. Another objective of the invention is to produce a lignin fraction and soluble carbohydrate containing fraction effectively. Another objective of the inven- tion is to improve an enzymatic hydrolysis process. SUMMARY OF THE INVENTION There is provided a method for treating plant based raw material with an enzymatic hydrolysis accord- ing to the present invention. There is provided an apparatus for treating plant based raw material with an enzymatic hydrolysis according to the present invention. There is provided a soluble carbohydrate con- taining fraction according to the present invention. There is provided a lignin fraction according to the present invention. There is provided a lignin based material ac- cording to the present invention. There is provided a liquid fraction according to the present invention. There is provided a solid fraction according to the present invention. There is provided a use of the soluble carbo- hydrate containing fraction according to the present invention. There is provided a use of the lignin fraction according to the present invention. There is provided a use of the lignin based material according to the present invention. There is provided a use of the liquid fraction according to the present invention. There is provided a use of the solid fraction according to the present invention. There is provided a use of the liquid mixture according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and constitutes a part of this specification, illustrate some embodiments of the invention and together with the description help to explain the principles of the in- vention. In the drawings: Fig. 1 is a flow chart illustration of a meth- od according to one embodiment of the present inven- tion, Fig. 2 is a flow chart illustration of a meth- od according to another embodiment of the present in- vention, Fig. 3 is a flow chart illustration of a meth- od according to another embodiment of the present in- vention, Fig. 4 is a flow chart illustration of a meth- od according to another embodiment of the present in- vention, and Fig. 5 shows results from a viscosity measure- ment of the lignocellulosic material according to one method embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION In a method for treating plant based raw mate- rial (1) with an enzymatic hydrolysis (4), the plant based raw material (1) is treated to form lignocellulo- sic material (3a,3b), and the lignocellulosic material (3a,3b) or its fraction (10) is conducted into the en- zymatic hydrolysis (4). The method comprises at least one treatment stage (2a, 2b, 2c) in which the plant based raw material (1) is treated so that the lignocellulosic material (3a,3b) contains over 80 % fine solid parti- cles which are fiber-like or indefinable particles smaller than 0.2 mm, defined by an optical measurement device, e.g. by Metso <semantics>FS5TM<annotation encoding="application / x-tex">FS5^{TM}< / annotation>< / semantics>, and the lignocellulosic ma- terial (3a,3b) or at least one fraction (10) of the lignocellulosic material is supplied into the enzymatic hydrolysis (4) for forming a lignin based material (5). Further, the method comprises at least one solid-liquid separation stage (6) after the enzymatic hydrolysis (4) into which the lignin based material (5) is supplied and in which a lignin fraction (7) and a soluble carbo- hydrate containing fraction (8) are separated. One embodiment of the method of the present in- vention is shown in Fig. 1. Another embodiment of the method of the present invention is shown in Fig. 2. An- other embodiment of the method of the present invention is shown in Fig. 3. Another embodiment of the method of the present invention is shown in Fig. 4. The apparatus comprises at least one treatment device (2a, 2b, 2c) in which the plant based raw material (1) is treated to form lignocellulosic material (3a,3b) so that the lignocellulosic material (3a, 3b) contains over 80 % fine solid particles which are fiber-like or indefinable particles smaller than 0.2 mm, defined by an optical measurement device, e.g. by Metso <semantics>FS5TM<annotation encoding="application / x-tex">FS5^{TM}< / annotation>< / semantics>, at least one enzymatic hydrolysis device (4) in which a lignin based material (5) is formed from the lignocel- lulosic material (3a,3b) or at least one fraction (10) of the lignocellulosic material, at least one solid- liquid separation device (6) after the enzymatic hy- drolysis device in which a lignin fraction (7) and a soluble carbohydrate containing fraction (8) is sepa- rated from lignin based material (5), and at least one feeding device for feeding the plant based raw material (1) into the treatment device. The feeding device can be any feeding device, e.g. pump, screw, inlet means or other suitable feeding device. Further, the apparatus can comprise means, such as discharge means or outlet means, e.g. pipe, pipe fitting or assembly, for supply- ing the soluble carbohydrate containing fraction and lignin fraction out from the apparatus. In this context, an enzymatic hydrolysis means any enzymatic hydrolysis. In one embodiment, the enzy- matic hydrolysis is an enzymatic hydrolysis of cellu- lose. In this context, a soluble carbohydrate con- taining fraction (8) means any soluble carbohydrate containing filtrate which is separated from the lignin based material (5) at the solid-liquid separation stage (6) after the enzymatic hydrolysis. In a preferred em- bodiment, the soluble carbohydrate containing fraction includes carbohydrates, preferably C6 sugars (C6H12O6 or <semantics>(C6(H2O)n)<annotation encoding="application / x-tex">(C_6(H_2O)_n)< / annotation>< / semantics>. The soluble carbohydrate containing fraction may comprise carbohydrates, such as monosaccharides <semantics>(C6H12O6 or C5H10O5)<annotation encoding="application / x-tex">(C_6H_{12}O_6 \text{ or } C_5H_{10}O_5)< / annotation>< / semantics>, disaccharides <semantics>(C12H22O11)<annotation encoding="application / x-tex">(C_{12}H_{22}O_{11})< / annotation>< / semantics>, oligosac- charides and / or polysaccharides <semantics>((C6H10O5)n or (C5H8O4)n)<annotation encoding="application / x-tex">((C_6H_{10}O_5)_n \text{ or } (C_5H_8O_4)_n)< / annotation>< / semantics>. Preferably, the soluble carbohydrate containing fraction comprises soluble C6 carbohydrates (C6H12O6 or C6(H2O)n) and other soluble carbohydrates. The soluble carbohy- drate containing fraction may comprise also other compo- nents. In this context, a lignin fraction (7) means a solid residue, such as a solid cake, when the soluble carbohydrate containing filtrate has been separated from the lignin based material (5) at the solid-liquid separation stage (6) after the enzymatic hydrolysis. In a preferred embodiment, the lignin fraction comprises lignin and carbohydrates, preferably solid C6 carbohy- drates <semantics>(C6H12O6 or C6(H2O)n)<annotation encoding="application / x-tex">(C_6H_{12}O_6 \text{ or } C_6\left(H_2O\right)_n)< / annotation>< / semantics>. The lignin fraction may com- prise also other carbohydrates and other components. Preferably, the lignin fraction is in the solid form. In this context, lignin based material (5) means any lignin containing composition that can be in the form of slurry. The lignin based material contains soluble compounds, solid material and liquid, e.g. wa- ter. In one embodiment, the lignin based material con- tains at least soluble carbohydrates and lignin. In one embodiment, the lignin based material may comprise also other solid carbohydrates and / or other components. In one embodiment, the lignin based material can be pumped. In one embodiment, the lignin based material contains free liquid, such as free water. Preferably, the lignin based material has been formed from the lig- nocellulosic material (3a,3b), in one embodiment from solid fraction (10) of the lignocellulosic material (3a,3b). In one embodiment, the lignin based material is a crude lignin slurry. In this context, plant based raw material (1) means any plant based raw material, e.g. wood based raw material and / or other plant based material. The plant based raw material includes lignin, cellulose and hemi- cellulose. In one embodiment, the plant based raw mate- rial is selected from the group consisting of wood based material, wood, lignocellulosic biomass, agricultural residues, bagasse based material, sugarcane bagasse, corn based material, corn stover, wheat straw, rice straw, woody biomass, woody perennials, vascular plants and the like and their mixtures and their combinations. In one embodiment, the plant based raw material com- prises is wood based material or a mixture comprising wood based material. In one embodiment, the plant based raw material is wood based material or a mixture com- prising wood based material. In one embodiment, the wood based material is selected from hardwood, softwood or their combination. In one embodiment, the plant based raw material comprises plant pieces, e.g. wood pieces. In this context, lignocellulosic material (3a,3b) refers any lignocellulosic material which has been formed by treating, e.g. pretreating, from the plant based raw material by means of at least one suit- able treatment method in one or more steps. In one em- bodiment, the lignocellulosic material contains carbo- hydrates and lignin. Preferably, the carbohydrates have <semantics>Cn(H2O)n<annotation encoding="application / x-tex">C_n(H_2O)_n< / annotation>< / semantics> or <semantics>Cn(H2O)n−1<annotation encoding="application / x-tex">C_n(H_2O)_{n-1}< / annotation>< / semantics>. The carbohydrates can comprise monosaccharides <semantics>(C6H12O6orC5H10O5)<annotation encoding="application / x-tex">(C_6H_{12}O_6 \quad \text{or} \quad C_5H_{10}O_5)< / annotation>< / semantics>, disaccharides <semantics>(C12H22O11)<annotation encoding="application / x-tex">(C_{12}H_{22}O_{11})< / annotation>< / semantics>, oligosaccharides and / or polysaccharides <semantics>((C6H10O5)n or (C5H8O4)n)<annotation encoding="application / x-tex">((C_6H_{10}O_5)_n \text{ or } (C_5H_8O_4)_n)< / annotation>< / semantics>. Preferably, the lignocellulosic material includes carbohydrates, such as soluble C5 carbohydrates <semantics>(C5H10O5 or C5(H2O)n)<annotation encoding="application / x-tex">(C_5H_{10}O_5 \text{ or } C_5(H_2O)_n)< / annotation>< / semantics> and solid C6 carbohy- drates <semantics>(C6H12O6 or C6(H2O)n)<annotation encoding="application / x-tex">(C_6H_{12}O_6 \text{ or } C_6(H_2O)_n)< / annotation>< / semantics>. The lignocellulosic material may contain one or more lignocellulosic material compo- nents. In one embodiment, the lignocellulosic material is in the form of suspension which contains liquid, such as water. The lignocellulosic material (3a, 3b) is formed from the plant based raw material (1) and is treated at the treatment stage, preferably in one or more treat- ment step (2a, 2b, 2c). In one embodiment, the treatment stage comprises at least one pretreatment step (2a,2b) which is selected from the group consisting of physical treatment, such as milling, extrusion, microwave treat- ment, ultrasound treatment and freeze treatment, chemi- cal treatment, such as acid treatment, alkaline treat- ment, ionic liquid treatment, organosolv treatment and ozonolysis, physico-chemical treatment, such as steam explosion treatment, ammonia fiber explosion treatment, CO2 explosion treatment, liquid hot water treatment and wet oxidation, biological treatment and their combina- tions. Preferably, the plant based raw material is treated to dissolve hemicellulose. In one embodiment, the lignocellulosic material is formed or treated by the hydrolysis, e.g. acid hydrolysis, autohydrolysis, thermal hydrolysis, enzymatic hydrolysis, supercritical hydrolysis and / or subcritical hydrolysis, in which at least a part of lignin is separated from the raw mate- rial in connection with the hydrolysis. In one embodi- ment, the lignocellulosic material is formed or treated by the steam explosion, in which hemicelluloses are treated and in which at least a part of polysaccharides of the hemicelluloses degrade into monosaccharides and oligosaccharides by means of a hydrolysis and in which pressure is rapidly released. In one embodiment, the lignocellulosic material is formed or treated by the hydrolysis and by the steam explosion in one or more steps. In one embodiment, the lignocellulosic material is formed or treated by the catalytic pretreatment, e.g. by using acid or base as catalyst. In the pre- treatment process the plant based raw material enters the reactor unit where the pretreatment takes place. The lignocellulosic material can be treated by means of one or more pretreatment. In one embodiment, the treat- ed lignocellulosic material can be blown to a blowtank. In one embodiment, the lignocellulosic material can be dewatered, e.g. by dewatering presses in two stages. The dewatering makes possible to separate sugar based streams. In one embodiment, the plant based raw materi- al (1) is treated by means of a steam explosion treat- ment at the pretreatment step (2a, 2b). In one embodi- ment, the plant based raw material (1) is treated by means of a steam explosion treatment in presence of a chemical agent at the pretreatment step. In one embodi- ment, the chemical agent is a non-alkaline agent. In one embodiment, the chemical agent is an acid. In one embodiment, the chemical agent is a dilute acid, e.g. H2SO4. In one embodiment, the chemical agent is H2SO4. In one embodiment, the chemical agent may be any dilute acid. In one embodiment, pH of the dilute acid is be- tween 1.5 - 2.5. In one embodiment, temperature is un- der 180 °C in the steam explosion if water is used as a single solvent. In one embodiment, temperature is be- tween 170 - 210 °C in the steam explosion if water is used as a single solvent. In one embodiment, tempera- ture is 130 °C or over 130 °C in the steam explosion if ethanol is used as a solvent. In one embodiment, pres- sure is depending on temperature in the steam explo- sion. In one embodiment, pressure is between 8 - 20 bar in the steam explosion, especially if water is used as a single solvent. In one embodiment, pH is between 1 - 4, in one embodiment <semantics>1−3<annotation encoding="application / x-tex">1 - 3< / annotation>< / semantics>, in one embodiment <semantics>1−2<annotation encoding="application / x-tex">1 - 2< / annotation>< / semantics>, in connection with the steam explosion. In one embodiment, pH is between <semantics>1−4<annotation encoding="application / x-tex">1 - 4< / annotation>< / semantics>, in one embodiment <semantics>1−3<annotation encoding="application / x-tex">1 - 3< / annotation>< / semantics>, in one embodiment 1 - 2, in the hydrolysis in connection with the steam explosion. In one embodiment, the apparatus comprises a means for a steam explosion. By means of the dilute acid treatment and the steam explosion the most of the polysaccharides of the hemicelluloses de- grade into monosaccharides, and partly into oligosac- charides, and almost all of hemicellulose can be hydro- lyzed by short residence time at typical conditions. In one embodiment, the plant based raw materi- al (1) is treated by means of a hydrolysis and a me- chanical treatment at the pretreatment steps (2a,2b). In one embodiment, the lignocellulosic materi- al (3a) is treated by means of a soaking (2c) after the pretreatment step (2a,2b). In one embodiment, the lig- nocellulosic material (3a) is diluted for the soaking (2c), e.g. before and / or during the soaking. In one em- bodiment, the dry matter content of the lignocellulosic material (3a) is adjusted for the soaking, e.g. before and / or during the soaking, so that the lignocellulosic material comprises over 40 % by weight liquid, in one embodiment over 50 % by weight liquid, in one embodi- ment over 60 % by weight liquid, and in one embodiment over 70 % by weight liquid. In one embodiment, tempera- ture is between <semantics>20−100<annotation encoding="application / x-tex">20 - 100< / annotation>< / semantics> <semantics>∘<annotation encoding="application / x-tex">^{\circ}< / annotation>< / semantics>C, in one embodiment <semantics>20−90<annotation encoding="application / x-tex">20 - 90< / annotation>< / semantics> °C, in one embodiment 50 - 90 °C, in one embodiment 50 - 80 °C, in the soaking. In one embodiment, the resi- dence time is below 72 hours, in one embodiment below 24 hours. In one embodiment, the residence time is be- low 12 hours, in one embodiment below 6 hours, in one embodiment below 3 hours, and in one embodiment below 2 hours. In one embodiment, the residence time is over 15 min, in one embodiment over 30 min, and in one embodi- ment over 45 min. In one embodiment, the apparatus com- prises a soaking device. By means of the soaking good recovery of the hemicellulose can be achieved. In one embodiment, the lignocellulosic materi- al (3a,3b) or its solid fraction (10), preferably mate- rial which is supplied to the enzymatic hydrolysis (4), consists of fine solid particles. Particle size of the lignocellulosic material or its solid fraction can be measured with an optical measurement device, such as Metso <semantics>FS5TM<annotation encoding="application / x-tex">FS5^{TM}< / annotation>< / semantics> or Coulter LS230TM. In one embodiment, the lignocellulosic material (3a,3b) or its solid fraction (10) contains over 85 <semantics>%<annotation encoding="application / x-tex">\%< / annotation>< / semantics>, in one embodiment over 90 <semantics>%<annotation encoding="application / x-tex">\%< / annotation>< / semantics>, in one embodiment over 92 %, and in one embodiment over 94 %, fine solid particles, defined by an optical meas- urement device, such as by Metso FS5TM. The fine solid particles can be fiber-like or indefinable particles smaller than 0.2 mm. In one embodiment, the lignocellu- losic material (3a,3b) or its solid fraction (10) con- tains fine solid particles from which over 85 %, in one embodiment over 90 %, in one embodiment over 92 %, and in one embodiment over 94 <semantics>%<annotation encoding="application / x-tex">\%< / annotation>< / semantics>, are smaller than 0.2 mm, defined by Metso FS5TM. In one embodiment, the lignocel- lulosic material (3a,3b) or its solid fraction (10) contains fine solid particles which are particles that are small enough to pass through the Bauer McNett 200- mesh screen. In one embodiment, the lignocellulosic ma- terial (3a,3b) or its solid fraction (10) comprises fi- ne solid particles which have particle size Mode be- tween <semantics>18−300μm<annotation encoding="application / x-tex">18 - 300 \mu m< / annotation>< / semantics>, defined by Coulter LS230TM. In one embodiment, the lignocellulosic material (3a,3b) or its solid fraction (10) comprises fine solid particles which have Coulter LS Particle size Mode 19 - 200 µm, in one embodiment 20 - 150 <semantics>μ<annotation encoding="application / x-tex">\mu< / annotation>< / semantics>m, in one embodiment 20 - 120 <semantics>μ<annotation encoding="application / x-tex">\mu< / annotation>< / semantics>m, and in one embodiment 21 - 75 <semantics>μ<annotation encoding="application / x-tex">\mu< / annotation>< / semantics>m, defined by Coulter LS230TM. The values for particle size are de- pending on the method and thus values from Metso FS5TM and Coulter LS230<semantics>TM<annotation encoding="application / x-tex">^{\text{TM}}< / annotation>< / semantics> and Bauer McNett cannot be directly compared. Particle size of the solid particles can be defined based on ISO 16065-N or TAPPI T271. The pre- treatment process decreases the particle size and fibre length of original wood fibre, which can be defined by separating fibres by cooking the wood in e.g. sulphate process or maceration. The sulphate process is result- ing fibre length of about 80 % of the one after the maceration. In one embodiment, the viscosity of the ligno- cellulosic material (3a,3b) or its fraction (10), pref- erably material which is supplied to the enzymatic hy- drolysis (4), is below 18000 mPas, in one embodiment below 13000 mPas, in one embodiment below 10000 mPas, and in one embodiment below 8000 mPas, at 15 % dry mat- ter content, measured by BrookfieldTM viscosity device at 45°C with 10 rpm and spindel type "Vane". In this context, the lignocellulosic material or its fraction comprises below 20 w-% soluble matter during the vis- cosity measurement. By means of the suitable viscosity the separation and the enzymatic hydrolysis can be im- proved. In one embodiment, the lignocellulosic materi- al (3a,3b) or its solid fraction (10) contains over 80 % fine solid particles which are fiber-like or indefin- able particles smaller than 0.2 mm, defined by an opti- cal measurement device, e.g. by Metso <semantics>FS5TM<annotation encoding="application / x-tex">FS5^{TM}< / annotation>< / semantics>, and the viscosity of the lignocellulosic material (3a,3b) or its fraction (10) is below 18000 mPas at 15 % dry mat- ter content, measured by BrookfieldTM viscosity device at 45°C with 10 rpm and spindel type "Vane". In one em- bodiment, the lignocellulosic material (3a,3b) or its solid fraction (10) comprises fine solid particles which have particle size Mode between 18 - 300 µm, de- fined by Coulter LS230TM, and the viscosity of the liq- nocellulosic material (3a,3b) or its fraction (10) is below 18000 mPas at 15 % dry matter content, measured by BrookfieldTM viscosity device at 45°C with 10 rpm and spindel type "Vane". In one embodiment, the viscosity of the lignocellulosic material (3a,3b) or its fraction (10) is below 18000 mPas, in one embodiment below 13000 mPas, in one embodiment below 10000 mPas, and in one embodiment below 8000 mPas, at 15 % dry matter content, measured by BrookfieldTM viscosity device at 45°C with 10 rpm and spindel type "Vane". In one embodiment, the lignocellulosic material (3a,3b) or its solid fraction (10) contains over 85 <semantics>%<annotation encoding="application / x-tex">\%< / annotation>< / semantics>, in one embodiment over 90 <semantics>%<annotation encoding="application / x-tex">\%< / annotation>< / semantics>, in one embodiment over 92 %, and in one embodiment over 94 %, fine solid particles which are fiber-like or in- definable particles smaller than 0.2 mm, defined by Metso FS5TM. In one embodiment, the lignocellulosic ma- terial (3a, 3b) or its solid fraction (10) comprises fine solid particles which have Particle size Mode 19 - 200 µm, in one embodiment 20 - 150 µm, in one embodi- ment 20 - 120 <semantics>μ<annotation encoding="application / x-tex">\mu< / annotation>< / semantics>m, and in one embodiment 21 - 75 <semantics>μ<annotation encoding="application / x-tex">\mu< / annotation>< / semantics>m, de- fined by Coulter LS230<semantics>TM<annotation encoding="application / x-tex">^{TM}< / annotation>< / semantics>. In one embodiment, dry matter content of the lignocellulosic material (3a,3b) is 20 - 80 % by weight, in one embodiment 30 - 70 % by weight, in one embodiment 50 - 60 % by weight, after the pretreatment (2,2b) and / or soaking (2c). The dry matter content is determined at 45 °C by means of evaporating. When the determination of the dry matter content is made at tem- perature 45°C so also small-molecular organic compounds remain in the mass during the drying of the determina- tion. In one embodiment, the determination of the dry matter content may be done so that it is based, at least partly or as applied, on NREL (National renewable energy laboratory) Laboratory Analytical Procedures for standard biomass analysis determined in the Technical Report NREL / TR-510-48087 (revised July 2011). In one embodiment, the lignocellulosic materi- al (3a,3b) is diluted with liquid, preferably with wa- ter or a filtrate from a separation, or steam to form the feed to the separation stage (9) or the enzymatic hydrolysis (4). In one embodiment, feed concentration of the lignocellulosic material (3a,3b) is 2 - 60 % by weight, in one embodiment 5 - 30 % by weight, in one embodiment 10 - 20 % by weight. If feed concentration of the lignocellulosic material is low so then size of the device increases, for example at the separation stage <semantics>(9)<annotation encoding="application / x-tex">(9)< / annotation>< / semantics>. In one embodiment, pH is adjusted before the enzymatic hydrolysis (4). In one embodiment, the pH is between 4.0 - 6Ø Preferably, pH value depends on an enzyme. In one embodiment, the lignocellulosic materi- al (3a,3b) is conducted a solid-liquid separation stage in which a liquid fraction (11) and a solid frac- tion (10) are separated before the enzymatic hydroly- sis, and the solid fraction (10), in one embodiment at least a part of the solid fraction (10), is conducted into the enzymatic hydrolysis (4). The apparatus com- prises at least one solid-liquid separation device for separating a liquid fraction (11) and a solid fraction (10). In one embodiment, a washing filtrate or liquid fraction or a part of the liquid fraction from the sep- aration stage (9) is recirculated to the lignocellulo- sic material (3a) for the soaking (2c), e.g. before and / or during the soaking, and / or to the lignocellulo- sic material (3b) before the solid-liquid separation stage (9) in order to dilute the lignocellulosic mate- rial. The separation stage (9) before the enzymatic hydrolysis may be carried out by means of a similar separation method or device as used in the separation stage (6) after the enzymatic hydrolysis or by means of other suitable separation method or device. In this context, a liquid fraction (11) means any liquid fraction which is separated from the ligno- cellulosic material (3a,3b) at any solid-liquid separa- tion stage (9) before the enzymatic hydrolysis. In a preferred embodiment, the liquid fraction includes car- bohydrates, preferably C5 sugars <semantics>(C5H10O5 or (C5(H2O)n)<annotation encoding="application / x-tex">(C_5H_{10}O_5 \text{ or } (C_5(H_2O)_n)< / annotation>< / semantics>. The liquid fraction may be comprise carbohydrates, such as monosaccharides <semantics>(C6H12O6 or C5H10O5)<annotation encoding="application / x-tex">(C_6H_{12}O_6 \text{ or } C_5H_{10}O_5)< / annotation>< / semantics>, disaccharides <semantics>(C12H22O11)<annotation encoding="application / x-tex">(C_{12}H_{22}O_{11})< / annotation>< / semantics>, oligosaccharides and / or polysaccharides <semantics>((C6H10O5)n or (C5H8O4)n)<annotation encoding="application / x-tex">((C_6H_{10}O_5)_n \text{ or } (C_5H_8O_4)_n)< / annotation>< / semantics>. Preferably, the liquid fraction comprises soluble C5 carbohydrates (C5H10O5 or C5(H2O)n) and other carbohydrates. The liquid fraction may com- prise also other components. In this context, a solid fraction (10) means any solid fraction which is separated from the ligno- cellulosic material (3a,3b) at any solid-liquid separa- tion stage (9) before the enzymatic hydrolysis. In a preferred embodiment, the solid fraction comprises carbo- hydrates, and preferably solid C6 carbohydrates (<semantics>C6H12O6<annotation encoding="application / x-tex">C_6H_{12}O_6< / annotation>< / semantics> or <semantics>C6(H2O)n<annotation encoding="application / x-tex">C_6(H_2O)_n< / annotation>< / semantics>, and lignin. The solid fraction may com- prise also other carbohydrates and other components. The solid-liquid separation stage (6,9) may comprise one or more separation steps. In one embodi- ment, the solid-liquid separation is carried out in one or more separation steps in the separation stage. In one embodiment, the solid-liquid separation stage com- prises more than one sequential separation steps. In one embodiment, the solid-liquid separation stage com- prises different procedures which may be done in sepa- rate separation steps. Alternatively, more than one procedure is done in one process step. In one embodiment, the method comprises more than one separation stages (6,9). In one embodiment, the method comprises more than one sequential separa- tion stages. In one embodiment, the apparatus comprises more than one separation devices. In one embodiment, the solid-liquid separation stage comprises at least one separation device. In one embodiment, the solid- liquid separation stage comprises more than one separa- tion device. In one embodiment, one or more separation steps can be done in the same separation device. In one embodiment, the separation device comprises one or more separation step, e.g. separation segment. In one embodiment, the separation device is based on a countercurrent washing. In one embodiment, the separation device is selected from the group con- sisting of filtration device, centrifugal device and their combinations. In one embodiment, the separation device is selected from the group consisting of pres- sure filtration device, vacuum filtration device, fil- tration device based on underpressure, filtration de- vice based on overpressure, filter press, other suita- ble press, centrifugal device and their combinations. In one embodiment, the separation device is a pressure filtration device, vacuum filtration device, filtration device based on underpressure or filtration device based on overpressure. Alternatively, the separation device can be another washing device in which low amount of washing water is used and washing is done in high dry matter content. Then good recovery can be achieved. In one embodiment, the separation is based on filtration, centrifugal treatment or their combination. In one embodiment, the filtration is carried out by pressure, underpressure or overpressure. In one embodiment, the solid-liquid separation stage (6,9) comprises a filtration in which the soluble carbohydrate containing fraction or liquid fraction is separated in a liquid form and a solid cake is formed. Preferably, pressure is used in the filtration. In one embodiment, liquid is separated by a pressure differ- ence, such as by means of vacuum or overpressure. In one embodiment, the solid-liquid separation stage com- prises a washing in which a displacement washing of the lignocellulosic material is carried out with small amount clean water in order to remove majority of sug- ars, inhibitors and other soluble compounds from the solid lignocellulosic material and to provide high re- covery of soluble compounds. Preferably, ratio of wash- ing water to solid is below 6, preferably below 3 and more preferably below 1.5. In one embodiment, the sol- id-liquid separation stage comprises the filtration and washing. In one embodiment, the filtration and washing is carried out in a static chamber, preferably in a non-moving chamber. In one embodiment, the filtration and washing is carried out in one device under pressure without mixing between the filtration and washing. Preferably, said separation device comprising the fil- tration and washing is in the vertical or horizontal plane, not in the inclined plane. High concentration and recovery of soluble material in the liquid phase can be achieved with small amount of clean water, and a solid fraction without soluble compounds can be achieved. In one embodiment, the separation is made by means of pressure filtration. In one embodiment, the apparatus comprises at least one pressure filtration device as the solid-liquid separation device. In one embodiment, the solid-liquid separation stage comprises one pressure filtration device. In one embodiment, the solid-liquid separation stage comprises more than one pressure filtration device. In a preferred embodiment, the washing in the pressure filtration device is based on a displacement of liquid. In one embodiment, the pressure filtration comprises a pumping step, pressing, washing step, pressing and removal of a cake. In the pumping step, the solid cake is formed and pressed. Preferably, in the pumping step, a chamber of the pres- sure filtration device is filled, and prepressing is made. In one embodiment, air blow is made after the pumping step or after the first pressing step to fur- ther remove liquid from the cake. Preferably, the solu- ble carbohydrate containing fraction or liquid fraction is separated in connection with the pumping step. In the washing step, washing water is pressed through the cake and the cake is pressed and preferably dewatered. In the washing step, the liquid of the cake can be dis- placed by water. In one embodiment, air blow is made in the washing step to further remove liquid from the cake. The washing filtrate is separated by pressing in connection with the washing step. The dewatered solid cake is removed from the pressure filtrate device. Preferably, the dewatered solid cake forms a solid fraction or lignin fraction. An advantage of the pres- sure filtration is that all separation steps can be carried out by one device. In different separation stages the separation can be carried out by means of similar or different separation methods or separation devices. In one embodiment, the lignin based material is diluted with liquid, preferably with water, or steam to form the feed to the separation stage (6). In one embodiment, feed concentration of the lignin based ma- terial (5) is <semantics>2−60%<annotation encoding="application / x-tex">2 - 60 \%< / annotation>< / semantics> by weight, preferably <semantics>5−40%<annotation encoding="application / x-tex">5 - 40 \%< / annotation>< / semantics> by weight, more preferable 10 - 30 % by weight, into the solid-liquid separation stage (6). If feed concen- tration of the lignin based material is low so then size of the device increases. In one embodiment, the washing filtrate which is recovered may be used in a dilution of the lignin based material. In one embodiment, the lignocellulosic materi- al (3a,3b) or its fraction (10) or lignin based materi- al (5) is fed by means of a pump, e.g. a mono pump or piston pump or other suitable pump, or other suitable feeding device into the solid-liquid separation stage (9,6). Selection of the pump or feeding device is based on e.g. feed concentration and / or viscosity of the lig- nocellulosic material or lignin based material. Preferably, at least a part of the soluble carbohydrate containing fraction (8) is supplied out from the separation stage (6) after the enzymatic hy- drolysis. The soluble carbohydrate containing fraction can be supplied out after any desired step of the sepa- ration stage. In one embodiment, the soluble carbohy- drate containing fraction is supplied out after one or more step of the separation stage. The soluble carbohy- drate containing fractions may be combined or used sep- arately as component. Preferably, a lignin fraction (7) comprising solids is supplied out from the solid-liquid separation stage (6) after the enzymatic hydrolysis. In one embod- iment, the lignin fraction is supplied out after one or more step of the separation stage, preferably in one step. In one embodiment, the lignin fraction is sup- plied out after the last step. In one embodiment, at least a part of the liq- uid fraction (11) is supplied out from the separation stage (9) before the enzymatic hydrolysis. The liquid fraction can be supplied out after any desired step of the separation stage. In one embodiment, the liquid fraction is supplied out after one or more step of the separation stage. The liquid fractions may be combined or used separately as component. In one embodiment, a part of the liquid fraction is separated from the lig- nocellulosic material (3a,3b) in connection with the treatment stage (2a, 2b, 2c) in which the lignocellulosic material is formed and / or treated. In one embodiment, at least a part of the liquid fraction (11) is recircu- lated to the lignocellulosic material (3a,3b) before the separation stage (9) or for the soaking (2c), e.g. before and / or during the soaking. An amount of fresh water can be decreased by means of the recirculation. In one embodiment, a solid fraction (10) com- prising solids is supplied out from the solid-liquid separation stage (9) and is supplied into the enzymatic hydrolysis (4). In one embodiment, the solid fraction comprises C6 carbohydrates, such as (C6H12O6 or (C6(H2O)n), other solid carbohydrates and lignin, and some other compounds, such as some residual soluble ma- terial. In one embodiment, the solid fraction is in the form of a cake. In one embodiment, dry matter content of the cake is 30 - 70 % by weight, preferably 35 - 60 % by weight, more preferably 50 - 60 % by weight, after the solid-liquid separation stage (9). In one embodi- ment, dry matter content of the cake is 7 - 70 % by weight, preferably 15 - 45 % by weight, more preferably 25 - 35 % by weight, after the solid-liquid separation stage (9). In one embodiment, the solid fraction con- tains soluble compounds below 20 %, preferably below 15 %, more preferably below 6 % by weight, most preferably below 3 % by weight, after the solid-liquid separation stage (9), determined by a gravimetric washing method. In one embodiment, the soluble carbohydrate containing fraction (8) is formed from the lignin based material (5). In one embodiment, the soluble carbohy- drate containing fraction can be used as component in manufacturing a final product or can be treated or con- centrated. In one embodiment, the soluble carbohydrate containing fraction (8) comprises soluble C6 carbohy- drates, such as <semantics>C6H12O6<annotation encoding="application / x-tex">C_6H_{12}O_6< / annotation>< / semantics> or <semantics>C6(H2O)n<annotation encoding="application / x-tex">C_6(H_2O)_n< / annotation>< / semantics>, and other soluble carbohydrates, lignin and some other compounds. The soluble carbohydrate containing fraction may contain also C5 carbohydrates. Preferably, the soluble carbohy- drate containing fraction can contain monosaccharides, and oligosaccharides. Further, the soluble carbohydrate containing fraction can contain also polysaccharides. In one embodiment, the soluble carbohydrate containing fraction contains galactose, glucose, mannose, arabi- nose, xylose, glucuronic acid and galacturonic acid. In one embodiment, the soluble carbohydrate containing fraction contains glucose more than xylose. Total car- bohydrate content can be measured with HPLC after acid hydrolysis according to standard SCAN-CM 71:09. Mono- meric carbohydrate content can be measured with HPLC from liquid composition directly without acid hydroly- sis. In one embodiment, the total soluble concentrate of the soluble carbohydrate containing fraction is be- tween 20 to 280 <semantics>g / l<annotation encoding="application / x-tex">g / l< / annotation>< / semantics>, preferably between 40 to 240 <semantics>g / l<annotation encoding="application / x-tex">g / l< / annotation>< / semantics>, more preferable between 55 to 210 g / l after the solid- liquid separation. In one embodiment, the total soluble concentrate of the soluble carbohydrate containing fraction is between 10 to 210 g / l, preferably between 20 to 180 g / l, more preferable between 30 to 140 g / l after the solid-liquid separation (6). In one embodi- ment, the total soluble concentrate of the soluble car- bohydrate containing fraction is between 30 to 230 g / l, preferably between 50 to 220 g / l, more preferable be- tween 100 to 210 g / l after the solid-liquid separation. Preferably, the soluble carbohydrate containing frac- tion is in the form of solution. In one embodiment, carbohydrate concentrate of the soluble carbohydrate containing fraction (8) is between 20 to 200 g / l, pref- erably between 40 to 170 g / l, more preferable between 50 to 150 g / l after the solid-liquid separation (6). In one embodiment, carbohydrate concentrate of the soluble carbohydrate containing fraction is between 10 to 150 g / l, preferably between 20 to 125 g / l, more preferable between 30 to 100 g / l after the solid-liquid separa- tion. In one embodiment, carbohydrate concentrate of the soluble carbohydrate containing fraction is between 25 to 230 <semantics>g / l<annotation encoding="application / x-tex">g / l< / annotation>< / semantics>, preferably between 50 to 215 <semantics>g / l<annotation encoding="application / x-tex">g / l< / annotation>< / semantics>, more preferable between 100 to 200 g / l after the solid- liquid separation. In one embodiment, the lignin fraction (7) com- prising solids is formed from the lignin based material (5). In one embodiment, the lignin fraction can be used as component in manufacturing a final product or can be treated. In one embodiment, the lignin fraction (7) comprises lignin and solid C6 carbohydrates, such as <semantics>(C6H12O6 or (C6(H2O)n)<annotation encoding="application / x-tex">(C_6H_{12}O_6 \text{ or } (C_6(H_2O)_n)< / annotation>< / semantics>, other solid carbohydrates and oth- er solid components, and some other compounds, such as some residual soluble material. In one embodiment, the lignin fraction is in the form of a cake. In one embod- iment, dry matter content of the lignin fraction is 20 - 80 % by weight. In one embodiment, dry matter content of the lignin fraction is 30 - 60 % by weight, prefera- bly 40 - 60 % by weight, more preferably 45 - 55 % by weight, after the solid-liquid separation stage (6). In one embodiment, dry matter content of the lignin frac- tion is 7 - 70 % by weight, preferably 15 - 45 % by weight, more preferably 30 - 40 % by weight, after the solid-liquid separation stage (6). The dry matter con- tent is determined at 60 °C by means of evaporating. In one embodiment, the determination of the dry matter content may be done so that it is based, at least part- ly or as applied, on NREL (National renewable energy laboratory) Laboratory Analytical Procedures for stand- ard biomass analysis determined in the Technical Report NREL / TR-510-48087 (revised July 2011). In one embodi- ment, the cellulose content, i.e. glucan content, of the lignin fraction (7) is 3 - 70 % by weight, prefera- bly 5 - 60 % by weight and more preferably 10 - 60 % by weight, analyzed as glucose. In this context, glucan means <semantics>β<annotation encoding="application / x-tex">\beta< / annotation>< / semantics>-glucan, such as <semantics>β<annotation encoding="application / x-tex">\beta< / annotation>< / semantics>-1,4-glucan, i.e. cellulose. In one embodiment, the carbohydrate content of the lig- nin fraction (7) is between 2 to 50 % by weight. In one embodiment, the carbohydrate content is 10 - 30 % by weight, and more preferably 15 - 25 % by weight. In one embodiment, the carbohydrate content is 40 - 70 % by weight, and more preferably 40 - 60 % by weight. In one embodiment, the carbohydrate content is 5 - 80 % by weight, and more preferably 40 - 70 % by weight. In one embodiment, the lignin fraction (7) contains soluble compounds below 20 % by weight, preferably below 15 % by weight, more preferably below 6 % by weight, most pref- erably below 3 % by weight, after the solid-liquid sepa- ration stage (6). In one embodiment, water soluble matter is determined by a gravimetric washing method. In one embodiment the liquid fraction (11) is formed from the lignocellulosic material (3a,3b). In one embodiment, the liquid fraction can be used as com- ponent in manufacturing a final product or can be treated or concentrated. In one embodiment, the liquid fraction (11) contains soluble C5 carbohydrates. The liquid fraction may contain also C6 carbohydrates, preferably below 20 w-%. Preferably, the liquid frac- tion can contain other monosaccharides, disaccharides, oligosaccharides and / or polysaccharides. In one embodi- ment, the liquid fraction contains galactose, glucose, mannose, arabinose, xylose, glucuronic acid and galac- turonic acid. In one embodiment, the liquid fraction contains xylose more than glucose. In one embodiment, the liquid fraction contains glucose less than 20 % by weight, in one embodiment less than 15 % by weight, less than 10 % by weight, from an amount of the xylose. In one embodiment, the liquid fraction contains less than 50 % by weight glucose and more than 50 % by weight xylose, from an amount of the glucose and xy- lose. In one embodiment, a ratio <semantics>(w / w)<annotation encoding="application / x-tex">(w / w)< / annotation>< / semantics> of glucose to xy- lose, glucose:xylose, is less than 1. In one embodiment, the liquid fraction comprises soluble C5 carbohydrates, such as <semantics>C5H10O5<annotation encoding="application / x-tex">C_5H_{10}O_5< / annotation>< / semantics> or <semantics>C5(H2O)n<annotation encoding="application / x-tex">C_5(H_2O)_n< / annotation>< / semantics>, and other carbohydrates and some other compounds. Total carbohydrate content can be measured with HPLC after acid hydrolysis according to standard SCAN-CM 71:09. Monomeric carbohydrate content can be measured with HPLC from liquid composition di- rectly without acid hydrolysis. In one embodiment, the soluble carbohydrate concentrate of the liquid fraction is over 50 <semantics>g / l<annotation encoding="application / x-tex">g / l< / annotation>< / semantics>, preferably over 70 <semantics>g / l<annotation encoding="application / x-tex">g / l< / annotation>< / semantics>, more preferable over 100 g / l after the solid-liquid separation (9). In one embodiment, the soluble carbohydrate concentrate of the liquid fraction is below 250 g / l, in one embodiment below 200 g / l, in one embodiment below 150 g / l after the solid-liquid separation. In one embodiment, the soluble carbohydrate concentrate of the liquid fraction is between 15 to 280 g / l, preferably 30 to 200 g / l, more preferable 50 to 165 g / l after the solid-liquid separation. Preferably, the liquid fraction is in the form of solution. In one embodiment, water soluble mat- ter is between 20 to 425 <semantics>g / l<annotation encoding="application / x-tex">g / l< / annotation>< / semantics>, preferably 45 to 303 <semantics>g / l<annotation encoding="application / x-tex">g / l< / annotation>< / semantics>, more preferable 75 to 250 g / l after the solid-liquid separation (9). Water soluble matter can be determined by means of a method described later as "gravimetric washing method". In one embodiment, the soluble carbohydrate containing fraction (8) is recovered. The soluble car- bohydrate containing fraction may be used as component in manufacturing a final product. In one embodiment, the soluble carbohydrate containing fraction can be concentrated for further use. In one embodiment, the soluble carbohydrate containing fraction is supplied to a further processing. In one embodiment, the monomeri- zation of the soluble carbohydrate containing fraction is made before the further processing. In one embodi- ment, the soluble carbohydrate containing fraction is supplied to a fermentation process. In one embodiment, the soluble carbohydrate containing fraction is used as a source material in fermentation. In one embodiment, the soluble carbohydrate containing fraction is sup- plied to a hydrolysis process. In one embodiment, the soluble carbohydrate containing fraction is used as a source material in hydrolysis, e.g. acid hydrolysis or the like. In one embodiment, the soluble carbohydrate containing fraction is supplied to a chemical treat- ment. In one embodiment, the soluble carbohydrate con- taining fraction is used as a source material in the chemical treatment. In one embodiment, the soluble car- bohydrate containing fraction is supplied to a catalyt- ic treatment. In one embodiment, the soluble carbohy- drate containing fraction is used as a source material in the catalytic treatment. In one embodiment, the solu- ble carbohydrate containing fraction is supplied to a polymerization process. In one embodiment, the soluble carbohydrate containing fraction is used as a source ma- terial in the polymerization process. In one embodiment, the soluble carbohydrate containing fraction is sup- plied to a depolymerization process. In one embodiment, the soluble carbohydrate containing fraction is used as a source material in the depolymerization process. In one embodiment, the soluble carbohydrate containing fraction is supplied to a degradation process. In one embodiment, the soluble carbohydrate containing fraction is used as a source material in the degradation process. In one embodiment, the soluble carbohydrate containing fraction is supplied to an enzymatic treatment. In one embodiment, the soluble carbohydrate containing fraction is used as a source material in the enzymatic treatment. In one embodiment, the soluble carbohydrate containing fraction is supplied to a manufacture of binder. In one embodiment, the soluble carbohydrate containing fraction is used as a source material in the manufacture of bind- er, e.g. wood based binder. In one embodiment, the solu- ble carbohydrate containing fraction is supplied to a manufacture of food. In one embodiment, the soluble carbohydrate containing fraction is used as a source ma- terial in the manufacture of food. In one embodiment, the soluble carbohydrate containing fraction is sup- plied to a manufacture of feed. In one embodiment, the soluble carbohydrate containing fraction is used as a source material in the manufacture of feed. The soluble carbohydrate containing fraction may be supplied di- rectly to a fermentation, hydrolysis, chemical treat- ment, catalytic treatment, polymerization process, de- polymerization process, degradation process, enzymatic treatment, manufacture of binder, manufacture of feed, manufacture of food, or other suitable process or their combinations, or alternatively via a suitable treatment step or an additional step, e.g. additional concentra- tion step and / or purification step, to a fermentation, hydrolysis, chemical treatment, catalytic treatment, polymerization process, depolymerization process, deg- radation process, enzymatic treatment, manufacture of binder, manufacture of feed, manufacture of food or other suitable process or their combinations. In one embodiment, a lignin fraction (7) com- prising solids is recovered. The lignin fraction may be used as component in manufacturing a final product. In one embodiment, the lignin fraction can be treated, e.g. purified, for further use. In one embodiment, the lignin fraction is supplied to a further processing. In one embodiment, the lignin fraction is supplied to a hydrolysis which may be selected from the group con- sisting of acid hydrolysis, supercritical hydrolysis and / or subcritical hydrolysis and their combinations, or to a polymerization process or to a depolymerization process or to a degradation process or to a chemical treatment or to a manufacture of a composite material or to a manufacture of binder, e.g. wood based binder, or to a manufacture of feed or to a manufacture of food or to a combustion process or to other suitable process or their combinations. The lignin fraction may be sup- plied directly to a hydrolysis, polymerization process, depolymerization process, degradation process, chemical treatment, manufacture of a composite material, manu- facture of binder, manufacture of feed, manufacture of food, combustion process or other suitable process or their combinations, or alternatively via a suitable treatment step or an additional step, e.g. additional concentration step and / or purification step, to a hy- drolysis, polymerization process, depolymerization pro- cess, degradation process, chemical treatment manufac- ture of a composite material, manufacture of binder, manufacture of feed, manufacture of food, combustion process or other suitable process or their combina- tions. In one embodiment, at least a part of lignin based material (5) comprising solids is recovered. The lignin based material may be used as component in manu- facturing a final product. In one embodiment, the lig- nin based material can be treated, e.g. purified, for further use. In one embodiment, the lignin based mate- rial is supplied to a further processing. In one embod- iment, the lignin based material is supplied to a hy- drolysis which may be selected from the group consist- ing of acid hydrolysis, supercritical hydrolysis and / or subcritical hydrolysis and their combinations, or to a polymerization process or to a depolymerization process or to a degradation process or to a chemical treatment or to a manufacture of a composite material or to a manufacture of binder, e.g. wood based binder, or to a manufacture of feed or to a manufacture of food or to a combustion process or to other suitable process or their combinations. The lignin based material may be supplied directly to a hydrolysis, polymerization process, depol- ymerization process, degradation process, chemical treatment, manufacture of a composite material, manu- facture of binder, manufacture of feed, manufacture of food, combustion process or other suitable process or their combinations, or alternatively via a suitable treatment step or an additional step, e.g. additional concentration step and / or purification step, to a hy- drolysis, polymerization process, depolymerization pro- cess, degradation process, chemical treatment, manufac- ture of a composite material, manufacture of binder, manufacture of feed, manufacture of food, combustion process or other suitable process or their combina- tions. In one embodiment, the liquid fraction (11) is recovered. The liquid fraction may be used as component in manufacturing a final product. In one embodiment, the liquid fraction can be concentrated for further use. In one embodiment, the liquid fraction is supplied to a further processing. The liquid fraction may be supplied directly to a fermentation, hydrolysis, chemi- cal treatment, catalytic treatment, polymerization pro- cess, depolymerization process, degradation process, enzymatic process, manufacture of binder, manufacture of feed, manufacture of food or other suitable process or their combinations, or alternatively via a suitable treatment step or an additional step, e.g. additional concentration step and / or purification step, to a fer- mentation, hydrolysis, chemical treatment, catalytic treatment, polymerization process, depolymerization process, degradation process, enzymatic process, manu- facture of binder, manufacture of feed, manufacture of food or other suitable process or their combinations. In one embodiment, the solid fraction (10) is formed from the lignocellulosic material (3a,3b). In one embodiment, at least a part of the solid fraction can be recovered and used as component in manufacturing a final product. In one embodiment, the solid fraction is supplied to a further processing. The solid fraction may be supplied directly to a hydrolysis, polymeriza- tion process, depolymerization process, degradation process, chemical treatment, manufacture of a composite material, manufacture of binder, combustion process or other suitable process or their combinations, or alter- natively via a suitable treatment step or an additional step, e.g. additional concentration step and / or purifi- cation step, to a hydrolysis, polymerization process, depolymerization process, degradation process, chemical treatment, manufacture of a composite material, manu- facture of binder, combustion process or other suitable process or their combinations. In one embodiment, the soluble carbohydrate containing fraction (8) and the liquid fraction (11) is combined partially or as a whole in order to form a liquid mixture. In one embodiment, the liquid mixture comprises 1 - 99 w-% soluble carbohydrate containing fraction and <semantics>1−99 w-%<annotation encoding="application / x-tex">1 - 99 \text{ w-}\%< / annotation>< / semantics> liquid fraction, from the total weight of the soluble carbohydrate containing fraction and liquid fraction. The liquid mixture may be used as component in manufacturing a final product. In one em- bodiment, the liquid mixture can be concentrated for further use. In one embodiment, the liquid mixture is supplied to a further processing. The liquid mixture may be supplied directly to a fermentation, hydrolysis, chemical treatment, catalytic treatment, polymerization process, depolymerization process, degradation process, enzymatic treatment, manufacture of binder, manufacture of feed, manufacture of food or other suitable process or their combinations, or alternatively via a suitable treatment step or an additional step, e.g. additional concentration step and / or purification step, to a fer- mentation, hydrolysis, chemical treatment, catalytic treatment, polymerization process, depolymerization process, degradation process, enzymatic treatment, man- ufacture of binder, manufacture of feed, manufacture of food or other suitable process or their combinations. In one embodiment, water soluble matter is de- termined by a gravimetric washing method. The determina- tion by the gravimetric washing method may be done as following: dry matter content (DM%) of raw material, e.g. the solid and soluble fraction, is measured at 60°C, the amount of solids remaining after heating the sample at 60°C to constant weight is measured and dry matter con- tent is calculated based on wet and dry weights. For washing about 10 g bone dry of the wet material under investigation is taken, weighted (exact weighed amount) and mixed with hot water (50°C) in a vessel so that total amount is 200 g, the mixture is mixed 20 s (Bamix Mono freehand food blender, 'C' blade, speed 1 (7000 rpm)), the mixture is soaked with soaking time 5 min, the mix- ture is mixed 10 s (Bamix Mono freehand food blender, C' blade, speed 1 (7000 rpm)), mass of a dry filter paper is measured, the mixture is filtered by means of Büchner (dia.125 mm) and the filter paper, an inward relief valve is closed when a cake is matt (dry) in whole, a filtrate is taken and the blender and vessel is washed with the filtrate and the filtrate is filtered again through the cake, the cake is washed three times with hot water, á 100 g, so that suction effect is maintained the whole time and washing water (100 g) is added when the cake is matt (dry) in whole, a foil dish is weighed, the cake with the filter paper is dried in the foil dish, the dried cake (60°C) with the filter paper is weighed in the foil dish and mass of the filter paper and foil dish is subtracted from mass of the dried cake, filter paper and foil dish, and then soluble matter free solid, i.e. water insoluble solids (WIS) of wet material under investiga- tion, can be determined. Water insoluble solids, WIS%, can be calculated: WIS% = (weight of washed and dried material, e.g. the cake) / (weight of the wet slurry for washing, e.g. the raw material). Water soluble matter, WS%, of dry matter can be calculated: WS% = (dry matter (DM%) of the original slurry, e.g. the raw material)- (water insoluble solids, WIS%). In one embodiment, with high soluble material content (25 - 50 % of total dry matter soluble) of raw material, the lignin fraction (7) or solid fraction (10) contains soluble compounds below 20 %, preferably below 15 %, more preferably below 9 %, most preferably below 5 %, by weight after the solid-liquid separation stage (6,9), measured by gravimetric washing method. In one embodiment, with lower soluble material content (below 25 % of total dry matter soluble) of raw material, the lignin fraction (7) or solid fraction (10) contains solu- ble compounds below 9 %, preferably below 6 %, more pref- erably below 3 %, by weight after the solid-liquid sepa- ration stage (6,9), measured by gravimetric washing meth- od. Particle size of the solid particles can be defined, e.g. by an optical measurement device, such as Metso <semantics>FS5TM<annotation encoding="application / x-tex">FS5^{TM}< / annotation>< / semantics> or Coulter LS230TM. In one embodiment, parti- cle size of the solid particles can be defined based on ISO 16065-N or TAPPI T271. Fibre length of the solid particles can be defined based on ISO 16065-N, when fi- bres are defined as material longer than 0.2 mm. Fibre length of the solid particles can be defined based on TAPPI T271, when fibre length is 0.01 to 7.60 mm. In connection with Metso FS5TM, Lc means contour length, i.e. centerline fiber length, which is fiber length measured from the fibers center line from one end to another. Length-weighted Lc(1) means length-weighted fiber length which is average fiber length measured from a fiber distribution weighted according to the TAPPI T271 standards. Weight-weighted Lc(w) means weight-weighted fiber length which is likewise average fiber length measured from a fiber distribution weighted according to the TAPPI T271 standards. Arith- metic Lc(n) means arithmetic mean which is calculated from the population distribution of fibers. In this re- sult average length is calculated from the length dis- tribution. F1(1)% means length weighted distribution % (width <semantics>>10μm<annotation encoding="application / x-tex">> 10 \mu m< / annotation>< / semantics>, length <semantics><0.2mm<annotation encoding="application / x-tex">< 0.2 mm< / annotation>< / semantics>). Fiber width is meas- ured as integral value from the middle of the fiber to account for tapered ends. In one embodiment, length-weighted particle length <semantics>Lc(1)<annotation encoding="application / x-tex">Lc(1)< / annotation>< / semantics> is below <semantics>[(0.4)×(correspondingunrefined)]<annotation encoding="application / x-tex">[(0.4) \times (corresponding unrefined)]< / annotation>< / semantics> sulphate pulp fibre length)], in one embodiment below [(0.3) x (corresponding unrefined sulphate pulp fibre length)], in one embodiment below <semantics>[(0.2)×(correspond)]<annotation encoding="application / x-tex">[(0.2) \times (correspond)]< / annotation>< / semantics> ing unrefined sulphate pulp fibre length)], in one embod- iment below [(0.1) x (corresponding unrefined sulphate pulp fibre length)]. In one embodiment, fine particle width (frac- tion <semantics>0−0.2 mm<annotation encoding="application / x-tex">0 - 0.2 \text{ mm}< / annotation>< / semantics>) is below <semantics>[(0.7)×(corresponding unre-)]<annotation encoding="application / x-tex">[(0.7) \times (\text{corresponding unre-})]< / annotation>< / semantics> fined sulphate pulp fibre length)], in one embodiment below [(0.6) x (corresponding unrefined sulphate pulp fibre length)], in one embodiment below <semantics>[(0.5)×(corre−<annotation encoding="application / x-tex">[(0.5) \times (corre-< / annotation>< / semantics> sponding unrefined sulphate pulp fibre length)], in one embodiment below <semantics>[(0.4)×(correspondingunrefinedsul−<annotation encoding="application / x-tex">[(0.4) \times (corresponding unrefined sul-< / annotation>< / semantics> phate pulp fibre length)]. In one embodiment, the determination of parti- cle size of the solid particles in the cake needs proper sample preparation to disperse single particles to water. For dispersing about 10 g bone dry of the wet material under investigation is taken and mixed with water (about 20°C) in a vessel so that total amount is 200 g, the mix- ture is soaked with soaking time 15 min, and the mixture is mixed 60 s (Bamix Mono freehand food blender, 'C' blade, speed 1 (7000 rpm)). After that the material is ready to determination specific preparation. In one em- bodiment, to have more reliable picture of fine parti- cles, shorter than 0.2 mm, measurement is done by an op- tical measurement device, such as Metso FS5TM, such way that material pass the detector only once, so it is not circulated back to detector. In one embodiment, the amount of measured dry matter in one run is 1.6 g. In one embodiment, the fine solid particles are fiber-like or indefinable particles with longest dimen- sion shorter than 0.2 mm measured with optical Metso <semantics>FS5TM<annotation encoding="application / x-tex">FS5^{TM}< / annotation>< / semantics> (fraction <semantics>F1(1)<annotation encoding="application / x-tex">F1(1)< / annotation>< / semantics> of length weighted <semantics>Lc(1)<annotation encoding="application / x-tex">Lc(1)< / annotation>< / semantics> measure- ments and calculations). In one embodiment, the ligno- cellulosic material (3a,3b) or solid fraction (10) of hardwood comprises particles with longest dimension shorter than 0.2 mm over 70 % (Fl(1) > 70 %), preferably over 80 %, more preferably over 90 % and most prefera- bly over 95 % by weight, defined by Metso FS5TM (single pass run). In one embodiment, the lignocellulosic mate- rial (3a,3b) or solid fraction (10) of softwood com- prises particles with longest dimension shorter than 0.2 mm over 50 % (F1(1) <semantics>><annotation encoding="application / x-tex">>< / annotation>< / semantics>50 %), preferably over 60 %, more preferably over 70 % and most preferably over 80 % by weight, defined by Metso <semantics>FS5TM<annotation encoding="application / x-tex">FS5^{TM}< / annotation>< / semantics> (single pass run). In one embodiment, the lignin fraction (7) comprises particles with longest dimension shorter than 0.2 mm over 70 % (F1(1) >70 %), preferably over 80 %, more preferably over 90 % and most preferably over 95 % by weight, de- fined by Metso <semantics>FS5TM<annotation encoding="application / x-tex">FS5^{TM}< / annotation>< / semantics> (single pass run). In one embodiment, the lignocellulosic materi- al (3a,3b) or solid fraction (10) comprises fine solid particles which are fiber-like or indefinable particles. The length weighted length Lc(l) is measured based TAPPI T271 standard includes all the particles detected and filling the requirements of measurement. TAPPI T271 de- fines fiber length of material to have longest dimen- sion from 0.01 to 7.60 mm. In one embodiment, the lignocellulosic materi- al (3a, 3b) or solid fraction (10) comprises fine solid particles which are fiber-like or indefinable particles. The length weighted length Lc(l) is measured with Metso <semantics>FS5TM<annotation encoding="application / x-tex">FS5^{TM}< / annotation>< / semantics> (single pass run), where <semantics>Lc(1)<annotation encoding="application / x-tex">Lc(1)< / annotation>< / semantics> is including also the particles below <semantics>0.2 mm<annotation encoding="application / x-tex">0.2 \text{ mm}< / annotation>< / semantics>. The length weighted <semantics>Lc(1)<annotation encoding="application / x-tex">Lc(1)< / annotation>< / semantics>- value is 40 % or less of the length of corresponding un- refined sulphate pulp fibre length, preferably 30 % or less, more preferably 20 % or less, most preferably 10 % or less. And the width of the fine particle fraction of length weighted particles (Lc(1) fraction 0 - 0.2 mm) is 70 % or less of width of the corresponding sulphate pulp fibre, preferably 60 % or less, more preferably 50 % or less, the most preferably 40 % or less. In one embodiment, the lignocellulosic materi- al (3a,3b) or solid fraction (10) of hardwood comprises fine solid particles which are fiber-like or indefinable particles. The length weighted length Lc(1) is measured with Metso <semantics>FS5TM<annotation encoding="application / x-tex">FS5^{TM}< / annotation>< / semantics> (single pass run), where Lc(1) is in- cluding also the particles below 0.2 mm. The length weighted Lc(1) fractions over 0.2 mm fibre length is 50 % or less, preferably 35 % or less, more preferably 20 % or less, most preferably 5 % or less. In one embodiment, the lignocellulosic materi- al (3a,3b) or solid fraction (10) of softwood comprises fine solid particles which are fiber-like or indefinable particles. The length weighted length Lc(l) of solid fraction is measured with Metso <semantics>FS5TM<annotation encoding="application / x-tex">FS5^{TM}< / annotation>< / semantics> (single pass run), where Lc(1) is including also the particles below 0.2 mm. The length weighted Lc(l)fractions over 0.2 mm fibre length is 60 % or less, preferably 45 % or less, more preferably 30 % or less, most preferably 15 % or less. In one embodiment, the lignocellulosic materi- al (3a,3b) or its solid fraction (10) contains fine solid particles which comprise less than 90 %, in one embodiment less than 88 %, particles with below 50 µm particle size, defined by Coulter LS230TM. In one embod- iment, the lignocellulosic material (3a, 3b) or its solid fraction (10) contains fine solid particles which comprise 50 - 90 %, in one embodiment 60 - 90 %, and in one embodiment 70 - 90 %, particles with below 50 µm particle size, defined by Coulter LS230TM. In one embod- iment, the lignocellulosic material (3a,3b) or solid fraction (10) comprises particles with equivalent circu- lar area diameter smaller than 50 µm over 50 %, in one embodiment over 70 %, and preferably below 90 % by weight, defined by Coulter LS230<semantics>TM<annotation encoding="application / x-tex">^{\text{TM}}< / annotation>< / semantics>. In one embodiment, the lignocellulosic material (3a, 3b) or solid fraction (10) comprises solid particles which are fiber-like or indefinable particles measured in water solution with a laser diffraction method Coulter LS230TM, PIDS (Polari- zation Intensity Differential Scattering) including. In one embodiment, the lignocellulosic material (3a,3b) or solid fraction (10) comprises particles with Mode equivalent circular area diameter less than 300 µm, in one embodiment less than 200 µm, in one embodiment less than 100 µm, in one embodiment 50 µm, in one embodiment less than 40 <semantics>μ<annotation encoding="application / x-tex">\mu< / annotation>< / semantics>m, and in one embodiment less than 30 <semantics>μ<annotation encoding="application / x-tex">\mu< / annotation>< / semantics>m, and preferably over 18 <semantics>μm<annotation encoding="application / x-tex">\mu\text{m}< / annotation>< / semantics>, defined by Coulter LS230 <semantics>TM<annotation encoding="application / x-tex">^{\text{TM}}< / annotation>< / semantics>. Coulter LS230TM is based on a laser diffraction, and it measures particle size distributions by measuring the pattern of light scattered by the constituent particles in the sample. Coulter LS230TM comprises an optical mod- ule consisting of a diffraction component and PIDS (Po- larization Intensity Differential Scattering) assembly. The measuring range is 0.04 - 2000 µm so that the meas- uring range is 0.4 - 2000 µm with the diffraction com- ponent and the measuring range is 0.04 - 0.4 µm with the PIDS assembly. The method and apparatus provide the liquid fraction, solid fraction, soluble carbohydrate contain- ing fraction and lignin fraction with good quality. Further, concentration and sugar content of the soluble carbohydrate containing fraction can be increased. Fur- ther, the recovery of the soluble carbohydrate contain- ing fraction can be increased and more pure lignin frac- tion solids can be formed. The lignin fraction has also very high concentration of lignin and glucan and its hydrated products. In the method, a replacement washing is preferably used which leads to further increase of the concentration of the soluble compounds and increase purity of the lignin fraction. Further, post-treating costs of the soluble carbohydrate containing fraction can be decreased. High concentration is achieved with low energy consumption. The present invention provides an industrially applicable, simple and affordable way of making the pure lignin fraction and further the soluble carbohy- drate containing fraction. The method and apparatus are easy and simple to realize as a production process. The method and apparatus are suitable for use in the manu- facture of the different lignin based fractions and sugar based fractions, and final products from differ- ent starting materials. EXAMPLES The invention is described in more detail by the following examples with reference to accompanying drawings. Example 1 In this example a lignin fraction and soluble carbohydrate containing fraction are produced from plant based raw material according to a process of Fig.1. The lignocellulosic material (3a) is formed from plant based raw material (1) by means of one pre- treatment step (2a), or alternatively by means of two pretreatment steps (2a,2b). The plant based raw materi- al (1) can be treated by means of a hydrolysis and steam explosion treatment in presence of a chemical agent, e.g. H2SO4, at the pretreatment stage. The ligno- cellulosic material (3a) is conducted into an enzymatic hydrolysis (4) for forming a lignin based material (5). The lignin based material (5) is conducted into a sol- id-liquid separation stage (6) which comprises a sepa- ration device based on filtration or centrifugal treat- ment. A soluble carbohydrate containing fraction (8) and a lignin fraction (7) are separated at the solid- liquid separation stage (6). The soluble carbohydrate containing fraction (8) is recovered. A solid cake (7) containing lignin is removed from the solid-liquid sep- aration device and recovered. Example 2 In this example a lignin fraction and soluble carbohydrate containing fraction are produced from plant based raw material according to a process of Fig.2. The lignocellulosic material A (3a) is formed from plant based raw material (1) by means of a pre- treatment step (2a). The plant based raw material (1) can be treated by means of a hydrolysis and steam ex- plosion treatment in presence of a chemical agent, e.g. H2SO4, at the pretreatment stage. The lignocellulosic material A (3a) is treated by means of a soaking (2c) after the pretreatment step (2a). The lignocellulosic material B (3b) from the soaking step (2c) is conducted into an enzymatic hydrolysis (4) for forming a lignin based material (5). The lignin based material (5) is conducted into a solid-liquid separation stage (6) which comprises a separation device based on filtration or centrifugal treatment. A soluble carbohydrate con- taining fraction (8) and a lignin fraction (7) are sep- arated at the solid-liquid separation stage (6). The soluble carbohydrate containing fraction (8) is recov- ered. A solid cake (7) containing lignin is removed from the solid-liquid separation device and recovered. Example 3 In this example a lignin fraction and soluble carbohydrate containing fraction are produced from plant based raw material according to a process of Fig.3. The lignocellulosic material A (3a) is formed from plant based raw material (1) by means of a pre- treatment step (2a). The plant based raw material (1) can be treated by means of a hydrolysis and steam ex- plosion treatment in presence of a chemical agent, e.g. H2SO4, at the pretreatment stage. The lignocellulosic material A (3a) is treated by means of a soaking (2c) after the pretreatment step (2a). The lignocellulosic material B (3b) from the soaking step (2c) is conducted a solid-liquid separation stage (9) which comprises a separation device based on filtration or centrifugal treatment and in which a liquid fraction (11) and a solid fraction (10) are separated before an enzymatic hydrolysis (4), and the solid fraction (10) is conduct- ed into the enzymatic hydrolysis (4) for forming a lig- nin based material (5). The lignin based material (5) is conducted into a second solid-liquid separation stage (6) which comprises a separation device based on filtration or centrifugal treatment. A soluble carbohy- drate containing fraction (8) and a lignin fraction (7) are separated at the solid-liquid separation stage (6). The soluble carbohydrate containing fraction (8) is re- covered. A solid cake (7) containing lignin is removed from the solid-liquid separation device and recovered. Example 4 In this example a lignin fraction and soluble carbohydrate containing fraction are produced from plant based raw material according to a process of Fig.4. The lignocellulosic material A (3a) is formed from plant based raw material (1) by means of two pre- treatment steps (2a, 2b). The plant based raw material (1) can be treated by means of a hydrolysis and steam explosion treatment in presence of a chemical agent, e.g. H2SO4, at the pretreatment stage. The lignocellulo- sic material A (3a) is treated by means of a soaking (2c) after the pretreatment steps (2a, 2b). The ligno- cellulosic material B (3b) from the soaking step (2c) is conducted a solid-liquid separation stage (9) which comprises a separation device based on filtration or centrifugal treatment and in which a liquid fraction (11) and a solid fraction (10) are separated before an enzymatic hydrolysis (4). In one embodiment, a part of liquid fraction which comprises soluble carbohydrates may be supplied out and / or recovered between pretreat- ment steps (2a,2b) or in connection with them. The solid fraction (10) is conducted into the enzymatic hy- drolysis (4) for forming a lignin based material (5). The lignin based material (5) is conducted into a sec- ond solid-liquid separation stage (6) which comprises a separation device based on filtration or centrifugal treatment. A soluble carbohydrate containing fraction (8) and a lignin fraction (7) are separated at the sol- id-liquid separation stage (6). The soluble carbohy- drate containing fraction (8) is recovered. A solid cake (7) containing lignin is removed from the solid- liquid separation device and recovered. Example 5 In this example a concentrated liquid (11) and purified solid fraction (10) were produced. Birch wood chips were pretreated in two-step dilute acid steam explosion process (2a, 2b) to dissolve hemicellulose. The formed lignocellulosic material (3a) was mixed with hot water and stirred for a while in a soaking step (2c). Then solid-liquid separation was done with Outotec Larox PF 0.1 pressure filter (9). Filtration area was 0.1 m2. Amount of washing water was 1:1 (water:water insoluble solids in the cake) and 3:1. Dry matter of original pretreated biomass was 65 %, dry matter of the feed (3b) in the first filtration (9) was 16 %, and water insoluble solid content of that was 13 %. Water insoluble solid content of the feed was kept constant in filter press while dry matter of slurry was increased due to increased soluble material in slurry. Dry matter of washed cake was about 50 %. Composition of the solid fraction, which is further washed in la- boratory like in gravimetric washing method to remove all water soluble material, is presented in Table 1. The solid fraction was washed with water in order to remove residue soluble compounds, and after that the properties were determined. To simulate the increase of concentration when all the washing filtrate of the process and some solu- ble carbohydrate containing filtrate of first pressing was calculated to use as dilution water of next round, and again after second filtration the washing filtrate and some soluble carbohydrate containing filtrate of pressing was used in dilution of third filtration. In 1:1 washing case about 83 % of dilution liquid was sol- uble carbohydrate containing filtrate and in 3:1 case 48 % of dilution liquid was soluble carbohydrate con- taining filtrate. Washing efficiency was calculated to be 83 % (1:1) and 88 % (3:1). Finally more than 70 it- eration rounds were done. Simulation of the example was done with measured soluble matter content of 18.4 % of the pretreated lignocellulosic material. The concentra- tion of soluble matter containing filtrate coming out of the process will reach level of 135 g / l in continu- ous process with 1:1 washing and 99 g / l with 3:1 wash- ing. Table 1 [Image disponible dans le document PDF, Image available in the PDF document] [Image disponible dans le document PDF, Image available in the PDF document] [Image disponible dans le document PDF, Image available in the PDF document] Example 6 In this example a liquid fraction (11) and solid fraction (10) were produced. Eucalyptus wood chips were pretreated in one- step autohydrolysis and steam explosion process with two different process conditions to dissolve hemicellu- lose. The formed pretreated lignocellulosic materials were washed with hot water in laboratory to remove most of the water soluble compounds. These remaining, water soluble compound free solids were measured with two different particle size analyzer. The results of Metso <semantics>FS5TM<annotation encoding="application / x-tex">FS5^{TM}< / annotation>< / semantics> and Coulter <semantics>LS230TM<annotation encoding="application / x-tex">LS230^{TM}< / annotation>< / semantics> are presented in table 2 'two water insoluble solids of pretreated eucalyptus based lignocellulosic materials'. The results may be deter- mined by standards of ISO 16065-N or TAPPI T271. Table 2 [Image disponible dans le document PDF, Image available in the PDF document] [Image disponible dans le document PDF, Image available in the PDF document] Example 7 In this example, liquid and solid fractions were produced, and their uses in an enzymatic hydroly- sis were examined. Birch wood chips were pretreated in a dilute acid steam explosion process (2a) to dissolve hemicel- lulose for forming a lignocellulosic material (3a). The lignocellulosic material (3a) was soaked in a soaking step (2c) for forming a lignocellulosic material (3b). During the soaking, residence time was 24 hours, temperature was about 50 °C, and consistency was 28 %. The treated lignocellulosic material (3b) was supplied to a solid-liquid separation device (9). The separation device was a decanter centrifuge in experi- ments PTB1, PTB2 and PTB3, and the separation device was a pressure filter in experiment PTB4. The solid samples (PTB1, PTB2, PTB3, PTB4) of the treated biomass were taken after separation stage (9). The results are presented in Table 3. Further, the solid sample PTB2, taken after separation stage (9), was diluted to level of 15 % to- tal solids for an enzymatic hydrolysis (4) in laborato- ry scale. Mixing of slurry was good, and 5 % en- zyme / total solids was used in the experiment. Glucose yield after 72 hours was 80 %. Further, the solid sample PTB1, taken after separation stage (9), was diluted. It was observed that PTB1 was not possible to mix in the laboratory experi- ment at total solids level of 13 % or higher, and the enzymatic hydrolysis was not possible to do. Table 3 [Image disponible dans le document PDF, Image available in the PDF document] [Image disponible dans le document PDF, Image available in the PDF document] [Image disponible dans le document PDF, Image available in the PDF document] Example 8 In this example, viscosity of the lignocellu- losic material was measured. The lignocellulosic mate- rial was according to example 7 after separation (9). The viscosity was measured at 10, 15 and 20 % dry matter content by means of BrookfieldTM viscosity device at 45°C with 10 rpm and spindel type "Vane". The sample size in the measurement was 300 ml. Sample A had good mixing properties. Sample B had poor mixing prop- erties in mechanically agitated vessel where mixing was done with pitched-blade turbine (45°) type of impel- lers. The results from the viscosity measurements are presented in Fig. 5. It was observed that the lig- nocellulosic material with viscosity below 18000 mPas, at 15 % dry matter content, is suitable material for an enzymatic hydrolysis and a manufacture of lignin. The method and apparatus are suitable in dif- ferent embodiments to be used for producing the most different kinds of lignin and soluble carbohydrate based fractions from different plant based raw materi- als. The invention is not limited merely to the ex- ample referred to above; instead many variations are possible within the scope of the inventive idea defined by the claims.

Claims

<pat:ClaimStatement>What is claimed is:< / pat:ClaimStatement> <pat:Claims com:id="claims"> <pat:Claim com:id="CLM-00001"> <pat:ClaimNumber>1< / pat:ClaimNumber> <pat:ClaimText>1. A method for treating plant based raw material with an en- zymatic hydrolysis, in which the plant based raw material is treated to form a lignocellulosic material, and the lignocel- lulosic material or a solid fraction thereof is subjected to the enzymatic hydrolysis, wherein the method comprises: treating the plant based raw material in at least one treatment stage at least by a physical treatment, chemical treatment and / or physico-chemical treatment such that the plant based raw material is treated at least by hydrolysis and steam explosion, for forming the lignocellulosic material com- prising over 80% fine solid particles, which are fiber-like particles smaller than 0.2 mm, as measured by an optical meas- urement device, subjecting the lignocellulosic material or at least one solid fraction of the lignocellulosic material into the enzymatic hydrolysis for forming a lignin based material, and subjecting the lignin based material into at least one solid-liquid separation stage after the enzymatic hydroly- sis and separating a lignin fraction and a soluble carbohy- drate containing fraction. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00002"> <pat:ClaimNumber>2< / pat:ClaimNumber> <pat:ClaimText>2. The method according to claim 1, wherein the treatment stage comprises at least one pretreatment step comprising physical treatment, chemical treatment, physico-chemical treatment, biological treatment, or any combination thereof. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00003"> <pat:ClaimNumber>3< / pat:ClaimNumber> <pat:ClaimText>3. The method according to claim 2, wherein the physical treatment comprises milling, extrusion, microwave treatment, ultrasound treatment or freeze treatment. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00004"> <pat:ClaimNumber>4< / pat:ClaimNumber> <pat:ClaimText>4. The method according to claim 2 or 3, wherein the chemical treatment comprises acid treatment, alkaline treatment, ionic liquid treatment, organosolv treatment or ozonolysis. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00005"> <pat:ClaimNumber>5< / pat:ClaimNumber> <pat:ClaimText>5. The method according to any one of claims 2 to 4, wherein the physico-chemical treatment comprises steam explosion treat- ment, ammonia fiber explosion treatment, CO2 explosion treat- ment, liquid hot water treatment or wet oxidation. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00006"> <pat:ClaimNumber>6< / pat:ClaimNumber> <pat:ClaimText>6. The method according to claim 5, wherein the plant based raw material is treated by using the steam explosion treatment at the pretreatment step. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00007"> <pat:ClaimNumber>7< / pat:ClaimNumber> <pat:ClaimText>7. The method according to claim 5, wherein the plant based raw material is treated by using the steam explosion treatment in presence of a chemical agent at the pretreatment step. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00008"> <pat:ClaimNumber>8< / pat:ClaimNumber> <pat:ClaimText>8. The method according to claim 7, wherein the chemical agent is a non-alkaline agent. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00009"> <pat:ClaimNumber>9< / pat:ClaimNumber> <pat:ClaimText>9. The method according to claim 7, wherein the chemical agent is an acid. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00010"> <pat:ClaimNumber>10< / pat:ClaimNumber> <pat:ClaimText>10. The method according to any one of claims 1 to 9, wherein the lignocellulosic material is treated by soaking. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00011"> <pat:ClaimNumber>11< / pat:ClaimNumber> <pat:ClaimText>11. The method according to claim 10, wherein the lignocellu- losic material is diluted for the soaking. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00012"> <pat:ClaimNumber>12< / pat:ClaimNumber> <pat:ClaimText>12. The method according to any one of claims 1 to 11, wherein the optical measurement device is a Metso <semantics>FS5TM<annotation encoding="application / x-tex">FS5^{TM}< / annotation>< / semantics>. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00013"> <pat:ClaimNumber>13< / pat:ClaimNumber> <pat:ClaimText>13. The method according to any one of claims 1 to 12, wherein the lignocellulosic material comprises fine solid particles which have particle size mode between 18 - 300 µm, as measured by a Coulter LS230<semantics>TM<annotation encoding="application / x-tex">^{\text{TM}}< / annotation>< / semantics>. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00014"> <pat:ClaimNumber>14< / pat:ClaimNumber> <pat:ClaimText>14. The method according to any one of claims 1 to 13, wherein the viscosity of the lignocellulosic material is below 18000 mPas at 15% dry matter content, as measured by a Brookfield™ viscosity device at 45°C with 10 rpm and spindle type Vane. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00015"> <pat:ClaimNumber>15< / pat:ClaimNumber> <pat:ClaimText>15. The method according to any one of claims 1 to 14, wherein the method comprises more than one solid-liquid separation stage. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00016"> <pat:ClaimNumber>16< / pat:ClaimNumber> <pat:ClaimText>16. The method according to any one of claims 1 to 15, wherein the lignocellulosic material is subjected to a solid-liquid separation stage in which a liquid fraction and a solid frac- tion are separated before the enzymatic hydrolysis, and the solid fraction is subjected to the enzymatic hydrolysis. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00017"> <pat:ClaimNumber>17< / pat:ClaimNumber> <pat:ClaimText>17. The method according to any one of claims 1 to 16, wherein the solid-liquid separation is made by filtration, centrifugal treatment, or a combination thereof. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00018"> <pat:ClaimNumber>18< / pat:ClaimNumber> <pat:ClaimText>18. The method according to any one of claims 1 to 17, wherein the solid-liquid separation stage comprises a washing in which a displacement washing is carried out with a small amount of clean water in which a ratio of washing water to solid is be- low 6. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00019"> <pat:ClaimNumber>19< / pat:ClaimNumber> <pat:ClaimText>19. The method according to claim 18, wherein the ratio of washing water to solid is below 3. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00020"> <pat:ClaimNumber>20< / pat:ClaimNumber> <pat:ClaimText>20. The method according to claim 19, wherein the ratio of washing water to solid is below 1.

5. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00021"> <pat:ClaimNumber>21< / pat:ClaimNumber> <pat:ClaimText>21. The method according to any one of claims 1 to 20, wherein the plant based raw material comprises wood based material or a mixture comprising wood based material. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00022"> <pat:ClaimNumber>22< / pat:ClaimNumber> <pat:ClaimText>22. The method according to any one of claims 1 to 21, further comprising using the soluble carbohydrate containing fraction as a source material in a fermentation, hydrolysis, chemical treatment, catalytic treatment, polymerization process, depol- ymerization process, degradation process, enzymatic treatment, manufacture of binder, manufacture of feed, manufacture of food or other suitable process, or any combination thereof. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00023"> <pat:ClaimNumber>23< / pat:ClaimNumber> <pat:ClaimText>23. The method according to any one of claims 1 to 22, further comprising using the lignin fraction as a source material in a hydrolysis, polymerization process, depolymerization process, degradation process, chemical treatment, manufacture of a com- posite material, manufacture of binder, manufacture of feed, manufacture of food, combustion process or other suitable pro- cess, or any combination thereof. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00024"> <pat:ClaimNumber>24< / pat:ClaimNumber> <pat:ClaimText>24. The method according to any one of claims 1 to 23, further comprising using the lignin based material as a source material in a hydrolysis, polymerization process, depolymerization pro- cess, degradation process, chemical treatment, manufacture of a composite material, manufacture of binder, manufacture of feed, manufacture of food, combustion process or other suita- ble process, or any combination thereof. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00025"> <pat:ClaimNumber>25< / pat:ClaimNumber> <pat:ClaimText>25. The method according to claim 16, further comprising using the liquid fraction as a source material in a fermentation, hydrolysis, chemical treatment, catalytic treatment, polymeri- zation process, depolymerization process, degradation process, enzymatic process, manufacture of binder, manufacture of feed, manufacture of food or other suitable process, or any combina- tion thereof. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00026"> <pat:ClaimNumber>26< / pat:ClaimNumber> <pat:ClaimText>26. The method according to claim 16, further comprising using the solid fraction as a source material in a hydrolysis, polymerization process, depolymerization process, degradation process, chemical treatment, manufacture of a composite mate- rial, manufacture of binder, combustion process or other suit- able process, or any combination thereof. < / pat:ClaimText> < / pat:Claim> <pat:Claim com:id="CLM-00027"> <pat:ClaimNumber>27< / pat:ClaimNumber> <pat:ClaimText>27. The method according to claim 16, further comprising form- ing a liquid mixture from the soluble carbohydrate containing fraction and the liquid fraction and using the liquid mixture as a source material in a fermentation, hydrolysis, chemical treatment, catalytic treatment, polymerization process, depol- ymerization process, degradation process, enzymatic treatment, manufacture of binder, manufacture of feed, manufacture of food or other suitable process, or any combination thereof. < / pat:ClaimText> < / pat:Claim> < / pat:Claims>