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Method for producing functional fertilizers by comprehensive utilization of shrimp and crab shells

A shrimp and crab shell and functional technology, which is applied in the field of comprehensive utilization of shrimp and crab shells to produce functional fertilizers, can solve the problems of difficult treatment, environmental pollution, high energy and resource consumption, etc., to suppress crop diseases and improve plant immunity , the effect of exerting one's own vitality

Active Publication Date: 2013-10-02
YANTAI GOODLY BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Advantages and disadvantages: the operation is simple and convenient, but it will consume a lot of energy and resources, and a large amount of waste liquid will be generated in the process of processing. Direct discharge will cause serious environmental pollution, and high cost will be required for treatment
[0013] (2) The concentration of inorganic salts and organic matter in sewage is high, which is difficult to deal with and seriously pollutes the environment
On the other hand, the waste water in the production process cannot be discharged, so it is of great practical significance to seek an effective method to solve environmental protection problems.

Method used

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  • Method for producing functional fertilizers by comprehensive utilization of shrimp and crab shells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Remove the meat and dirt from the fresh shrimp and crab shells, wash them and soak them in 10% dilute nitric acid. When the shrimp and crab shells are completely softened and there are no more bubbles, the pickling process is complete. Stir every 1 hour during the day for about 5 minutes. Minutes, then the shrimp and crab shells are taken out, washed with water, drained, and the soaked acid solution 1 is set aside;

[0079] Add the soaked shrimp and crab shells into 10% potassium hydroxide solution, boil for 2 hours while stirring, then filter, and the filtrate 2 is set aside;

[0080] The processed shrimp and crab shells are then put into a 40% KOH solution, heated to 100° C., stirred continuously, taken out and filtered after 3 hours, and the filtrate 3 is retained for use.

[0081] After filtering, the filtrate is stirred and dissolved with acid solution 1, filtered, and the insoluble matter is filtered out and then left to repeat the above steps together with fresh ...

Embodiment 2

[0086] Example 2: Experiment on cucumbers

[0087] Adopt the common chitosan production method and the product prepared in this embodiment 1 to carry out comparative test simultaneously, from the cucumber seedling stage, interval 15 days, spray continuously 3 times, the results are shown in Table 1, the product prepared in embodiment 1 has great effect on increasing cucumber The yield has a significant effect, while prolonging the harvest period and improving the taste.

[0088] Table 1 Experimental results

[0089]

[0090] Conclusion: The application of the product of the present invention can increase the yield of cucumber by nearly 30%. After adopting the patented environmental protection process, in addition to chitosan, the content of calcium and small molecule polypeptide is increased, and the fertilizer efficiency is further improved.

Embodiment 3

[0092] Remove the meat and dirt from the fresh shrimp and crab shells, wash them and soak them in 8% dilute nitric acid. When the shrimp and crab shells are completely softened and there are no more bubbles, the pickling process is complete. Stir every 1 hour during the day for about 5 minutes. Minutes, then fish out the shrimp and crab shells and wash with water until neutral, drain, and soak the acid solution 1 for later use;

[0093] Add the soaked shrimp and crab shells into 8% potassium hydroxide solution, boil while stirring for 2 hours, then filter, and the filtrate 2 is set aside;

[0094] The processed shrimp and crab shells are then placed in a 45% KOH solution and heated to 110 0 C, keep stirring, take out and filter after 2 hours, and keep the filtrate 3 and the filtrate for use.

[0095] Stir and dissolve the filtered filtrate with acid solution 1, filter, and leave the insoluble matter filtered out and repeat the above steps together with fresh shrimp and crab s...

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Abstract

The invention relates to a method for producing functional fertilizers by comprehensive utilization of shrimp and crab shells. The functional fertilizers are produced by utilizing waste of the shrimp and crab shells and have very good disease-resistant and yield-increasing effects to plants. The method is characterized in that calcium carbonate contained in the shrimp and crab shells is changed into water-soluble calcium, the contained protein is degraded into polypeptide or amino acid, important nutritional components needed by the plants and chitosan form a liquid fertilizer rich in nutrition, and the liquid fertilizer can be used for being sprayed on leaves or being flushed on roots. The method has the advantages that no waste water is discharged, the environment-friendly effect is achieved and simultaneously the fertilizer efficiency of the obtained fertilizer is obviously improved.

Description

technical field [0001] The invention relates to a method for comprehensively utilizing shrimp and crab shells to produce functional fertilizers, which belongs to the field of fertilizers. Background technique [0002] The technology of producing chitosan from shrimp and crab shells is relatively mature, and chitosan has been widely used in agriculture. However, in the production process, two acid and two alkali processes are usually required, and more than two times of alkali boiling is required for deacetylation. During the whole process, a large amount of acid and alkali waste liquid is generated, and finally the discharge standard cannot be met. [0003] The main components of shrimp and crab shells are rich in calcium, protein, chitin, and astaxanthin. The essence of the traditional process of preparing chitosan from shrimp and crab shells (acid-base method) is the "three removal" process of calcium decarbonation, deproteinization and deacetylation. [0004] 1. Process...

Claims

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Application Information

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IPC IPC(8): C05F11/00C05F1/00
CPCY02A40/20
Inventor 常大勇
Owner YANTAI GOODLY BIOTECH
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