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Enzymolysis-chemistry combined method for producing sodium alginate

A technology of sodium alginate and combined method, applied in the field of seaweed chemical industry, can solve the problems of environmental pollution, difficult treatment, high cost, etc., achieve the effects of reducing acid-base wastewater, easy control of production process, and reducing coal consumption

Active Publication Date: 2012-01-18
SHANDONG JIEJING GROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To produce 1 ton of sodium alginate and iodine and other joint products, it needs to consume more than 1,000 tons of fresh water, 50 tons of coal, and 3,000 kwh of electricity; high pollution
In order to remove the kelp cortex in the product, it needs to be diluted with a large amount of fresh water, resulting in a large amount of waste water containing high COD (1 ton of sodium alginate and iodine and other joint products will produce 800m3 highly polluted waste water), repeated acid and alkali reactions produce A large amount of acid and alkaline wastewater is very difficult to treat, the cost is high, and the direct discharge seriously pollutes the environment

Method used

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  • Enzymolysis-chemistry combined method for producing sodium alginate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Weigh 10 kg of brown algae such as light dried kelp, Ascophyllum nodosum, blackened Leisong algae or bark algae, add 50 liters of tap water to soak for 1 hour, and remove the sediment. Then add 50 liters of tap water to soak for 3 hours, and filter. Cut the brown algae into 20 cm long pieces with a shredder, transfer to a 50 L beater and add 20 liters of tap water to stir and beat for 0.5 h. Transfer the slurry to a 50L enzymolysis tank with heat preservation and heating functions, and transfer the compound enzyme that has been prepared according to the ratio to the enzymolysis tank. .5, heat preservation enzymolysis under the condition that the action time is 13h. After enzymatic hydrolysis, the temperature was raised to 90°C and kept for 0.5h to inactivate the enzyme. The enzymatic solution was separated by filtration, and the filter residue was kept for later use. Add 100 meshes and 1.0 kg of chemically pure anhydrous sodium carbonate to the enzymolysis filtrate, ...

Embodiment 2

[0035]Weigh 10 kilograms of dried brown algae such as Ascophyllum nodosum, blackened Leisongella, barkweed or lightly dried kelp, add 50 liters of tap water to soak for 1.5 hours, and remove the sediment. Then add 50 liters of tap water to soak for 3.5 hours, and filter. Cut the brown algae into 15cm long pieces with a shredder, transfer to a 50L beater and add 20 liters of tap water to stir and beat for 1.5h. Transfer the slurry to a 50L enzymolysis tank with heat preservation and heating functions, add the compound enzyme that has been prepared according to the ratio into the enzymolysis tank, the enzyme addition is about 300u / g, at a temperature of 55 ° C, pH .0, heat preservation enzymolysis under the condition that the action time is 25h. After enzymatic hydrolysis, the temperature was raised to 85°C and kept for 45 minutes to inactivate the enzyme. The enzymatic solution was separated by filtration, and the filter residue was retained. Add 100 meshes of 0.8 kg chemica...

Embodiment 3

[0039] The difference from Example 1 is:

[0040] The compound enzyme consists of 6ml of liquid cellulase (270,000 u / ml imported from the United States, C11840 type), 4.5 g of refined solid pectinase (P-3028, 500,000 u / ml from Sigma, USA) and hydrolyzed plant protease (F-3925, American Sigma company, 100,000 u / g) 1.5g composition. 4.02 million u

[0041] Weigh 10 kilograms of dried brown algae such as Ascophyllum nodosum, blackened lysophylla, bark algae or lightly dried kelp, add 50 liters of tap water to soak for 2.0 hours, and remove the sediment. Then add 50 liters of tap water to soak for 4.0 hours, and filter. Cut the brown algae into 15cm long pieces with a chopper, transfer to a 50L beater and add 20 liters of tap water to stir and beat for 1.8h. Transfer the slurry to a 50L enzymolysis tank with heat preservation and heating functions, and add the compound enzyme that has been prepared according to the ratio into the enzymolysis tank. .0, heat preservation enzymol...

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Abstract

The invention relates to the field of seaweed chemical industry, and specifically provides an enzymolysis-chemistry combined method for producing sodium alginate. The method comprises steps of: mixing pretreated alga and compound enzyme at 45-60 DEG C and a pH of 4.5-6.5, reacting for 13-26 h, carrying out an enzymolysis, filtering and converting the filtrate to obtain sodium alginate; and addingalkali liquor in the precipitate after the enzymolysis, reacting for 2-4 h at 50-80 DEG C, calcifying a filtrate after filtering, and adding sodium carbonate into calcified precipitate to convert into sodium alginate. The method of the invention can fundamentally solve drawbacks of high energy consumption and high pollution of a traditional production technology. According to one ton of sodium alginate and iodine coproduct produced by the enzymolysis-chemistry combined method of the invention, fresh water for production is reduced by 38%, and coal is reduced by 23%, and soda acid waste water generated is reduced by 52% less; and the method can increase yield by 9-11% compared with a conventional chemical production technology.

Description

technical field [0001] The invention relates to the field of seaweed chemical industry, in particular to a method for producing sodium alginate by an enzymatic hydrolysis-chemical combination method. Background technique [0002] my country's seaweed chemical industry started in the late 1960s. After decades of development, my country's current annual output of sodium alginate has reached more than 30,000 tons, becoming the world's largest producer of seaweed chemical products, of which more than 80% of the output is concentrated in Shandong Province, seaweed chemical industry has absorbed more than 70% of the kelp aquaculture output in Shandong Province, and its development is related to the sustainable development of the entire kelp industry in Shandong Province. [0003] As one of the leading products in the seaweed chemical industry, sodium alginate has a wide range of applications. In the pharmaceutical industry, sodium alginate is used in intestinal soft capsules, bari...

Claims

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Application Information

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IPC IPC(8): C08B37/04
Inventor 林鹤峰申健王斌李优林
Owner SHANDONG JIEJING GROUP CORP
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