Method for increasing total-component utilization rate of agricultural straw raw materials
A technology with full components and high utilization rate, applied in the direction of fermentation, etc., can solve the problems of difficult cleaning of lignin and high reaction temperature, and achieve the effect of good washing effect, high reactivity and simple method
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[0029] Example 1 Pretreatment and enzymatic hydrolysis of different NaOH mass fractions
[0030]Choose wheat straw as raw material, cut into 3-5 cm pieces manually or mechanically, wash and air-dry, pulverize with a pulverizer, and collect 40-80 mesh particles by standard sieve. Sodium hydroxide is used as the additive, ethanol is the organic solvent, a certain mass of NaOH is added to the ethanol solution with a volume fraction of 50%, and sodium hydroxide-ethanol pretreatment with a mass fraction of NaOH of 0.2%, 1%, and 1.8% is prepared. For the treatment agent, the solid-liquid ratio is 1:10 g / ml, the reaction temperature is 130° C., and the holding time is 3 h. After the reaction, vacuum filtration is performed to separate the solid and the liquid. The solid was washed with a large amount of ultrapure water until neutral, and then dried at 40°C. Calculate the yield and analyze the chemical composition of the material. Add acetic acid-sodium acetate buffer (pH=4.8) to th...
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[0037] The pretreatment of embodiment 2 different temperatures
[0038] Choose wheat straw as raw material, cut into 3-5 cm pieces manually or mechanically, wash and air-dry, pulverize with a pulverizer, and collect 40-80 mesh particles by standard sieve. Select sodium hydroxide as additive, ethanol as organic solvent, configure sodium hydroxide-ethanol pretreatment agent with sodium hydroxide mass fraction of 1% and ethanol volume fraction of 50%, solid-liquid ratio of 1:10 g / ml, and the reaction temperatures are respectively The temperature was 90°C and 170°C, the holding time was 3h, and the solid-liquid separation was carried out by vacuum filtration after the reaction. The solid was washed with a large amount of ultrapure water until neutral, and then dried at 40°C. Calculate the yield and analyze the chemical composition of the material. Add acetic acid-sodium acetate buffer (pH=4.8) to the solid material to keep the solid-liquid ratio at 1:40g / ml, add 30FPU / g cellulas...
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[0042] Example 3 Pretreatment of Different Kinds of Alkaline Additives
[0043] Choose wheat straw as raw material, cut into 3-5 cm pieces manually or mechanically, wash and air-dry, pulverize with a pulverizer, and collect 40-80 mesh particles by standard sieve. Select sodium hydroxide, potassium hydroxide and ammonia water as alkaline additives, ethanol as organic solvent, add alkali into ethanol solution with a volume fraction of 50%, and configure sodium hydroxide and potassium hydroxide with an alkali mass fraction of 1% respectively. Alkaline ethanol pretreatment agent with ammonia water, the solid-liquid ratio is 1:10g / ml, the reaction temperature is 130°C, the holding time is 3h, and the solid-liquid separation is carried out by vacuum filtration after the reaction. The solid was washed with a large amount of ultrapure water until neutral, and then dried at 40°C. Calculate the yield and analyze the chemical composition of the material. Add acetic acid-sodium acetate ...
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