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Preparation method of agar gel solution

A kind of technology of agar gel and gel solution, which is applied in the field of preparation of agar gel solution, and can solve the problems of enzyme inactivation, expensive enzyme, agar extraction process to be improved, etc.

Active Publication Date: 2020-08-11
JIMEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the extraction process of agar is mainly divided into alkaline extraction and enzymatic extraction. Alkaline extraction is usually treated with NaOH, KOH and other strong alkalis. Generally, 1 ton of agar needs to consume 0.7 tons of NaOH, and the waste liquid produced is neutralized by acid. After more than 100 tons, if a large amount of high-salt wastewater is directly discharged, it will cause great pollution to the surrounding environment, so companies need to spend a lot of money on sewage treatment
Although no alkali is used in the enzymatic extraction process, the enzymes used are expensive and are likely to cause enzyme inactivation, which is not conducive to production in the factory
[0004] Therefore, the extraction process of existing agar needs to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1 (small test, 2.5%, 100 ℃, 8h)

[0031] Get 25g of Gracilaria, remove impurities and clean it, and use a material-to-liquid ratio of 1:30 (W 江蓠菜 :V 水 ) add water, according to 1:100 (W 纤维素酶 :V 料液 ) ratio to add cellulase, adjust the pH to 6.5-6.7, and enzymatically treat at 50° C. for 2 hours. Then press 1:25(W 江蓠菜 :V 处理液 ), the Gracilaria after enzymolysis was added to the mixed acid treatment solution containing 0.06% sulfuric acid, 0.012% EDTA disodium, and 0.05% oxalic acid, and after acidification treatment for 40 minutes, rinse with tap water to neutral, then add water according to the ratio of material to liquid of 1:20, stir well, adjust the pH value to 7.8-8.0, boil the gelatin at 100°C until the Gracilaria is completely boiled, and form agar gel. Add Ca(OH) to the agar gel with a solid-to-liquid ratio of 1:40 2 , Stir well, and react at 100°C for 8h. Then, CO was introduced into the glue 2 , the glue appears turbid and generates CaCO 3 , ...

Embodiment 2

[0033] Embodiment 2 (small test, 5%, 100 ℃, 8h)

[0034] Get 25g of Gracilaria, remove impurities and clean it, and use a material-to-liquid ratio of 1:30 (W 江蓠菜 :V 水 ) add water, according to 1:100 (W 纤维素酶 :V 料液 ) ratio to add cellulase, adjust the pH to 6.5-6.7, and enzymatically treat at 50° C. for 2 hours. Then press 1:25(W 江蓠菜 :V 处理液 ), the Gracilaria after enzymolysis was added to the mixed acid treatment solution containing 0.06% sulfuric acid, 0.012% EDTA disodium, and 0.05% oxalic acid, and after acidification treatment for 40 minutes, rinse with tap water to neutral, then add water according to the ratio of material to liquid of 1:20, stir well, adjust the pH value to 7.8-8.0, boil the gelatin at 100°C until the Gracilaria is completely boiled, and form agar gel. Add Ca(OH) to the agar gel with a solid-to-liquid ratio of 1:20 2 , Stir well, and react at 100°C for 8h. Then, CO was introduced into the glue 2 , the glue appears turbid and generates CaCO 3 , wh...

Embodiment 3

[0036] Embodiment 3 (small test, 5%, 100 ℃, 10h)

[0037] Get 25g of Gracilaria, remove impurities and clean it, and use a material-to-liquid ratio of 1:30 (W 江蓠菜 :V 水 ) add water, according to 1:100 (W 纤维素酶 :V 料液 ) ratio to add cellulase, adjust the pH to 6.5-6.7, and enzymatically treat at 50° C. for 2 hours. Then press 1:25(W 江蓠菜 :V 处理液 ), the Gracilaria after enzymolysis was added to the mixed acid treatment solution containing 0.06% sulfuric acid, 0.012% EDTA disodium, and 0.05% oxalic acid, and after acidification treatment for 40 minutes, rinse with tap water to neutral, then add water according to the ratio of material to liquid of 1:20, stir well, adjust the pH value to 7.8-8.0, boil the gelatin at 100°C until the Gracilaria is completely boiled, and form agar gel. Add Ca(OH) to the agar gel with a solid-to-liquid ratio of 1:20 2 , Stir well, and react at 100°C for 10h. Then, CO was introduced into the glue 2 , the glue appears turbid and generates CaCO 3 , ...

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Abstract

The invention discloses a preparation method of an agar gel solution. The method is characterized by comprising the following steps: acidifying gracilaria; rinsing to be neutral; adding water into therinsed gracilaria, and heating to melt the gracilaria into glue; adding Ca (OH) 2 and / or CaO to enable the glue solution to be alkaline, and continuously heating; introducing CO2 to react with Ca (OH) 2 so as to generate CaCO3; and filtering to obtain an agar gel solution. The method is green and environment-friendly, can be used for preparing agar with high gel strength and high yield, and has relatively high application value.

Description

technical field [0001] The invention relates to the field of agar processing, in particular to a preparation method of agar glue. Background technique [0002] Agar is mainly distributed in the intercellular spaces of the medullary part of the cell wall of algal plants, and is a hydrophilic polysaccharide extracted from Rhodophyceae. Gracilaria has become the main raw material for extracting agar in my country in recent years. Agar is mainly composed of agarose molecules, including neutral agarose and acidic sulfur agar. The structure of sulfur agar is mainly sulfated polysaccharide, but it also contains substituent groups such as pyruvate and methyl. Alkali treatment can replace the sulfate group, thereby increasing its gel strength. Because agar has gelling properties, thickening properties, and stability, it is widely used in food, biotechnology, and medicine. [0003] At present, the extraction process of agar is mainly divided into alkaline extraction and enzymatic ...

Claims

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Application Information

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IPC IPC(8): C08B37/12
CPCC08B37/0039C08B37/0003
Inventor 肖安风
Owner JIMEI UNIV
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