Acid and alkali combination pretreatment method of straw efficient saccharification
A pretreatment and straw technology, applied in the production of sugar, sugar production, lactose production, etc., can solve the problems of long pretreatment process and large energy consumption, and achieve the goal of improving efficiency, reducing decomposition loss and improving enzymatic hydrolysis efficiency. Effect
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Embodiment 1
[0025] Mix crushed and sieved corn stalk particles (4-10 mesh), mass fraction 0.5% sulfuric acid, mass fraction 0.003% ferric chloride, mass fraction 0.05% hydrogen peroxide, wherein the mass concentration of straw particles is 10%, and heat up to 160 °C for 10 minutes, then lower the temperature to 120 °C for another 10 minutes, then lower the temperature to terminate the reaction. After the reaction mixture is cooled, it is extruded and filtered, and the filtrate is neutralized and filtered to obtain a hemicellulose sugar hydrolyzate. The mass concentration of the hemicellulose sugar (xylose+galactose+arabinose) liquid is 2.21%. The conversion rate of hemicellulose into monosaccharide was 88.4%. The filter residue was mixed with a mass fraction of 0.4% NaOH solution and soaked for 24 hours, wherein the solid concentration of the filter residue was 15%. After the end, the mixture was quickly squeezed and filtered, and the filter residue was washed with water and then added wi...
Embodiment 2
[0029] Mix crushed and sieved corn stalk particles (4-10 mesh), mass fraction 0.2% sulfuric acid, mass fraction 0.025% ferric chloride, mass fraction 0.2% hydrogen peroxide, wherein the mass concentration of straw particles is 15%, and heat up to 170 °C, react for 5 minutes, then lower the temperature to 110 °C, and proceed for another 30 minutes, then lower the temperature to terminate the reaction. After the reaction mixture is cooled, it is extruded and filtered, and the filtrate is neutralized and filtered to obtain a hemicellulose sugar hydrolyzate. The mass concentration of the hemicellulose sugar (xylose+galactose+arabinose) liquid is 1.90%. The conversion rate of hemicellulose into monosaccharide was 76.0%. Mix the filter residue with a mass fraction of 1% NaOH solution and soak for 15 hours, wherein the solid concentration of the filter residue is 20%. After the end, quickly squeeze and filter the above mixture. After the filter residue is washed with water, add cellu...
Embodiment 3
[0031]Mix crushed and sieved corn stalk particles (4-10 mesh), mass fraction 0.9% sulfuric acid, mass fraction 0.025% ferric chloride, mass fraction 0.05% hydrogen peroxide, wherein the mass concentration of straw particles is 10%, and heat up to 160 °C, react for 10 minutes, then lower the temperature to 130 °C, and proceed for another 5 minutes, then lower the temperature to terminate the reaction. After the reaction mixture is cooled, it is extruded and filtered, and the filtrate is neutralized and filtered to obtain a hemicellulose sugar hydrolyzate, and the mass concentration of the hemicellulose sugar (xylose+galactose+arabinose) liquid is 2.08%. The conversion rate of hemicellulose into monosaccharide was 83.2%. The filter residue was mixed with a mass fraction of 1% NaOH solution and soaked for 4 hours, wherein the solid concentration of the filter residue was 10%, and the above-mentioned mixture was squeezed and filtered quickly after the end, and the filter residue w...
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