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Method for obtaining free amino acid by the hydrolyzation of water bloom blue algae

A technology of free amino acids and bloom cyanobacteria, which is applied in the fields of amino acid fertilizers and amino acid feed additives obtained from hydrolysis of bloom cyanobacteria, can solve problems such as secondary pollution, waste of resources, lack of effective utilization methods for bloom cyanobacteria protein resources, and achieve production Low cost, no requirements for preparation conditions, and the effect of eliminating algae toxins

Inactive Publication Date: 2008-03-05
JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to address the lack of effective utilization methods for the current water bloom cyanobacteria protein resources, serious waste of resources, and serious secondary pollution if the cyanobacteria salvaged from polluted water cannot be disposed of in time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Fish bloom cyanobacteria with a water content of 90%, and obtain 100L of dehydrated cyanobacteria after dehydration, put them in a reaction kettle, add 20L of industrial sulfuric acid with a concentration of 98%, heat to 110°C, and react for 8 hours, then add 1Kg of zinc sulfate +1Kg copper sulfate, continue to heat and react for 2 hours, the temperature in the reactor is controlled at 110-120°C, after cooling to normal temperature, neutralize with 10mol / L potassium hydroxide (KOH) to pH 6, vacuum filter, A brown transparent amino acid-rich aqueous solution is obtained. See Table 1 for the types and contents of rich amino acids.

[0019] Table 1 Detection results of free amino acids in cyanobacteria hydrolyzate

[0020] Amino acid type

code name

Relative content (%)

Aspartic acid

Asp

11.61

threonine

Thr

5.86

serine

Ser

6.00

glutamic acid

Glu

17.55

Glycine

Gly

...

Embodiment 2

[0028] Fish out cyanobacteria with a water content of 80%, and obtain 50L of dehydrated cyanobacteria after dehydration, put it in a reaction kettle, add 12.5L of industrial hydrochloric acid, heat to 120°C, react for 6 hours, add 5Kg of zinc sulfate, and continue heating React for 4 hours, control the temperature in the reactor at 100-120°C, cool to room temperature, neutralize with 10mol / L sodium hydroxide (NaOH) to pH 6.5, and vacuum filter to obtain brown transparent amino acid-rich water agent. See Table 2 for the types and contents of rich amino acids

[0029] Table 2 Detection results of free amino acids in cyanobacteria hydrolyzate

[0030] Amino acid type

[0031] Using the same microcystin detection method as in Example 1, the algal toxins MC-RR and MC-LR were also not detected.

Embodiment 3

[0033] The amino acid-rich water formulation obtained according to the method of Example 1 is conventionally spray-dried so that the water content is lower than 5%, and the amino acid-rich powder can be obtained.

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Abstract

The present invention relates to a method capable of hydrolyzing algae bloom cyanophyte to obtain free amino acid. Said method includes the following steps: placing dehydrated algae bloom cyanophyte whose water content is 75-97% into a reaction still, adding concentrated sulfuric acid or concentrated hydrochloric acid whose added quantity is 15-30% of dehydrated cyanophyte volume, making reaction for 5-8hr, then adding catalyst which can be zinc salt and / or copper salt, continuously making reaction for 2-5hr so as to obtain acid cyanophyte solution, controlling temperature of reaction still at 100-120 deg.C, cooling, acid cyanophyte solution to normal temperature, then regulating its pH value to 6-7 by using alkaline neutralizing agent, evacuating and filtering so as to obtain water preparation containing rich amino acid, making said water preparation containing rich amino acid undergo the process of spray-drying or freeze-drying or vacuum drying treatment so as to obtain powder preparation containing rich amino acid.

Description

technical field [0001] The invention relates to a method for hydrolyzing cyanobacteria to obtain free amino acids, in particular to a method for hydrolyzing cyanobacteria to obtain amino acid fertilizers and amino acid feed additive products, which belongs to the category of deep development and utilization of cyanobacteria resources. Background technique [0002] Affected by industrial wastewater and domestic sewage discharge and agricultural non-point source pollution, the eutrophication of water bodies is increasing day by day. The serious pollution and unsafeness of drinking water have caused the water body to lose its original ecological, entertainment, sightseeing and other functions, which in turn has caused ecological disasters. The attention of the department and the general concern of the people. [0003] At present, the research and utilization of algae at home and abroad are mainly concentrated on spirulina, chlorella and Dunaliella, etc.; there are many treatme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23K1/16A23K1/14C05F11/00A23K10/30A23K20/142A23K40/00
Inventor 常志州黄红英叶小梅钱玉婷
Owner JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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