Method for coproduction of sodium alginate, mannitol and iodine by enzymolysis approach
A technology of sodium alginate and mannitol, applied in the separation/purification of iodine, iodine/hydrogen iodide, hydroxyl compounds, etc., can solve the problem of low profit or loss of kelp processing enterprises, large water consumption and high production cost of kelp processing technology It can achieve the effect of reducing consumption and sewage discharge, reducing energy consumption and reducing production costs.
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Embodiment 1
[0016] Cut 0g of kelp into pieces, then add 370mL of fresh drinking water, soak for 8 hours, then use a beater to homogenize the kelp, put it in a 55°C water solution for heating, directly add 0.05% of the weight of kelp compound protease, 55°C enzyme Decompose for 2 hours, stirring continuously during the enzymolysis process; after the end of the enzymolysis, raise the temperature to 90°C and keep for 10-20min to inactivate the enzyme, and then centrifuge to obtain the enzymolysis pretreatment solution A; use an equal volume of fresh drinking water for the kelp residue Wash twice, and the cleaning solution is combined and reserved for soaking in the next batch to obtain pretreated kelp.
[0017] The enzymatic hydrolysis pretreatment liquid A is pre-adjusted to a pH of 9.0, and the seaweed polysaccharides in it are flocculated and precipitated, and filtered; the clear liquid is adjusted to a pH of 2 with 5M HCl, and then 0.1% NaClO is added 3 , the iodine in it is converted in...
Embodiment 2
[0022] Take 1000kg of kelp, crush it, adjust the solid-liquid ratio to 1:7 with fresh drinking water, soak it at room temperature for 3 hours, and then use a beater to beat it; then put it in a water bath at 55°C and add 0.05% protease to continue enzymatic hydrolysis for 3 hours. Stir continuously during the enzymolysis process. After the enzymolysis is over, raise the temperature to 80°C and keep for 15 minutes to inactivate the enzyme; then, centrifuge to obtain the enzymolysis pretreatment solution: wash the kelp residue twice with an equal volume of fresh drinking water, wash The liquid is combined and reserved for soaking in the next batch.
[0023] The extraction of iodine is: the enzymatic hydrolysis pretreatment solution is adjusted to pH 9 with an appropriate amount of lime water, and the seaweed polysaccharides are flocculated and precipitated, filtered; the clear liquid is adjusted to pH 2 with 5M HCl, and then 0.2% NaClO 3 , so that the iodine in it is converted ...
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