Alcohol and succinic acid production method by fermenting cellulosic raw material
A technology for cellulose and succinic acid, which is applied in the field of producing ethanol and succinic acid by using a cellulose-based raw material fermentation method, can solve the problems of unutilized and the like, achieves low production cost, wide source of raw materials, and improved fermentation production efficiency. Effect
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Embodiment 1
[0023] Example 1 Preparation of sugar solution with corn stalks as raw material
[0024] Using corn stalks as raw materials to prepare sugar liquid comprises the following steps:
[0025] (1) Take 100 kg of corn stalks, remove the leaves and roots by hand, and process them with a straw feed kneading machine and a chip grinder. The aperture of the bottom discharge screen is Φ5, and the corn stalk powdery material is obtained.
[0026] (2) Using a cylindrical reactor with a volume of 0.8 cubic meters and a rotation speed of 1 rpm, 100 kilograms of crushed corn stalks were added to it, and 600 kilograms of dilute alkali solution with a concentration of 1.8% sodium hydroxide was added. Heating to 120°C, keeping the temperature for 1 hour, cooling down, and releasing the material.
[0027] (3) The material after the alkali treatment is squeezed dry with a screw squeezer, and the solid phase is washed with hot water until the pH value of the material is less than 9.
[0028] (4) J...
Embodiment 2
[0031] The establishment of embodiment 2 ethanol fermentation system
[0032] The establishment of ethanol fermentation system comprises the following steps:
[0033] (1) Plate culture: the plate medium consists of 3% glucose, 0.5% yeast extract, 0.5% peptone, and 2% agar. Alcoholic yeast strains were inoculated into the medium, and cultured at 33°C for 28 hours.
[0034] (2) Shake flask seed culture: the composition of the shake flask seed medium is glucose 3%, yeast extract 0.5%, peptone 0.15%, corn steep liquor 0.5%, potassium dihydrogen phosphate 0.05%, magnesium sulfate 0.06%, and tap water preparation. Inoculate the alcoholic yeast strain cultured on the plate into the medium, and culture at 33° C. for 32 hours, with the rotating speed of the shaker at 200 rpm.
[0035] (3) seed tank seed culture: medium composition is the concentrated sugar solution that embodiment 1 obtains, and add-on is to make the total sugar content in medium be 5%, yeast extract 0.2%, peptone 0....
Embodiment 3
[0038] Example 3 Succinic acid fermentation system and its coupling with ethanol fermentation system
[0039] The production method of succinic acid comprises the following steps:
[0040] (1) Plate culture: Inoculate the succinic acid bacteria species Actinobacillus succinate into the tryptone soybean agar medium, and culture it anaerobically at 35° C. for 28 hours.
[0041] (2) shake flask seed culture: medium composition is the concentrated sugar solution that embodiment 1 obtains, and add-on is to make the total sugar content in medium be 3%, yeast extract 0.4%, peptone 0.2%, corn steep liquor 0.3%, Na 2 CO 3 0.9%, NaH 2 PO 4 0.7%, K 2 HPO 4 1.0%, Na 2 HPO 4 0.2%, NaCl0.2%, tap water preparation. Inoculate the succinic acid bacteria cultured on the plate into a serum bottle containing 200ml of the above-mentioned medium for shaking flask culture, cultivate at 35°C for 15 hours, and the shaker speed is 180rpm.
[0042] (3) Seed tank culture: the medium composition i...
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