Method for producing agricultural chitosan and active calcium fertilizer by utilizing crawfish

A technology of active calcium fertilizer and chitin, applied in the application, agriculture, organic fertilizer and other directions, can solve the problems of restricting the healthy development of the chitin industry, polluting the environment, loss of nutrients, etc., to solve the problem of secondary pollution, and the production process is simple. Effect

Active Publication Date: 2011-05-11
SHANGHAI GUANFA MARINE BIOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the production process of processing chitin basically adopts traditional inorganic acid-base treatment. Although the processing cost is low, due to the discharge of a large amount of organic wastewater, it causes the loss of

Method used

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  • Method for producing agricultural chitosan and active calcium fertilizer by utilizing crawfish
  • Method for producing agricultural chitosan and active calcium fertilizer by utilizing crawfish
  • Method for producing agricultural chitosan and active calcium fertilizer by utilizing crawfish

Examples

Experimental program
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Effect test

Embodiment 1

[0016] Get crayfish to remove 1kg of the residue after the meat, as in the glass reaction container, add mixed acid solution I 10kg, mixed acid solution I is nitric acid, citric acid, acetic acid, formic acid and water according to mass ratio 12:2:6:2: Mixed at 400°C, 40°C cycle reaction for 10 hours, solid-liquid separation, washing the solid part with water for 3 times and drying in the sun, it is agricultural chitin, chitin in agricultural chitin≥70%, calcium≤5%, moisture≤ 10%, miscellaneous protein ≤ 15%, heavy metal qualified, 180 grams of agricultural chitin can be obtained, and the yield rate is 18%; the liquid part is concentrated and spray-dried to obtain 700 grams of active calcium fertilizer, which contains calcium nitrate, calcium formate, Soluble organic calcium such as calcium acetate, calcium amino acid, calcium gluconate, calcium citrate, calcium butyrate, calcium sorbate, calcium malate, etc., also contains protein, trace elements and other nutrients.

Embodiment 2

[0018] Take 500g of the crayfish residue after removing the meat, and add 3kg of mixed acid solution II to the glass reaction vessel. Mixed acid solution I is made by mixing nitric acid, lactic acid and water according to the mass ratio of 10:2:88, and the reaction is carried out at 30°C. After 5 hours, carry out solid-liquid separation, wash the solid part with water for 3 times and dry it in the sun, which is agricultural chitin, in which chitin≥70%, calcium≤5%, moisture≤10%, miscellaneous protein≤15%, The heavy metal is qualified, and 98 grams of chitin for agricultural use can be obtained, with a yield of 19.6%. The liquid part is concentrated and spray-dried to obtain 360 grams of active calcium fertilizer. The active calcium fertilizer contains calcium nitrate, calcium formate, calcium acetate, amino acid calcium, and calcium gluconate. , Calcium citrate, calcium butyrate, calcium sorbate, calcium malate and other soluble organic calcium, also contains protein, trace elem...

Embodiment 3

[0020] Take 5kg of crayfish residue after removing the meat, and add 20kg of mixed acid solution III to the glass reaction vessel, mixed acid solution I is nitric acid, lactic acid, cystine, gluconic acid and water according to the mass ratio of 10:2:6:2 : 78 mixed, reacted at 50°C for 3 hours, separated from solid and liquid, washed with water for 3 times and dried in the sun, then it is agricultural chitin. Chitin in agricultural chitin ≥ 70%, calcium ≤ 5%, moisture ≤10%, miscellaneous protein ≤15%, heavy metal qualified; 1000 grams of agricultural chitin can be obtained, and the yield is 20%; the liquid part is concentrated and spray-dried to obtain 3.6kg of active calcium fertilizer, which contains calcium nitrate and formic acid Calcium, calcium acetate, calcium amino acid, calcium gluconate, calcium citrate, calcium butyrate, calcium sorbate, calcium malate and other soluble organic calcium, also contains protein, trace elements and other nutrients.

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Abstract

The invention discloses a method for producing agricultural chitosan and an active calcium fertilizer by utilizing crawfish, which comprises the following steps of: mixing residual bodies of the crawfish from which flesh is removed with mixed acid solution, performing leaching at 30 to 60 DEG C, performing solid-liquid separation after the leaching is finished, and washing and drying a solid part to obtain the agricultural chitosan; and mixing a liquid part with washing liquid, and concentrating the mixed solution to obtain the active calcium fertilizer. The method for producing the agricultural chitosan and the active calcium fertilizer by utilizing the crawfish ensures a simple production process, avoids pollutions to the environment, solves the problems of secondary pollutions of crawfish deep-processing and high cost of the agricultural chitosan, and can realize the deferred production of the novel active calcium fertilizer.

Description

technical field [0001] The invention relates to a method for producing agricultural chitin and active calcium fertilizer by using crayfish. Background technique [0002] Crayfish are native to Louisiana in the southern United States, and their scientific name is Procambarus clarkii. They are scavengers and entered my country in the early 20th century. Since the natural enemy has not yet formed in our country, after decades of diffusion, it has formed the most common freshwater economic shrimp in the country, and is widely distributed in various provinces and cities in the middle and lower reaches of the Yangtze River. The protein content in crayfish is relatively high, accounting for about 16%-20% of the total, and the fat content is less than 0.2%. The content of trace elements such as zinc, iodine, and selenium in shrimp meat is higher than that of other foods. When being processed and eaten, 70% to 80% of the parts (mainly shrimp heads and shrimp shells) are always disca...

Claims

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Application Information

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IPC IPC(8): C08B37/08C05F1/00
CPCY02A40/20
Inventor 王士奎刘卫萍王金环张志民胡雪芳
Owner SHANGHAI GUANFA MARINE BIOTECH CO LTD
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