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Method for preparing liquid organic fertilizer by enzymolysis and fermentation of pigskin

A technology of liquid organic fertilizer and pigskin enzyme, applied in liquid fertilizer, fertilization device, fertilizer mixture, etc., can solve the problems of weakening the meaning and effect of green utilization of leather waste, improve the processing and utilization capacity, increase crop yield, and high fertilizer efficiency Effect

Inactive Publication Date: 2020-05-22
SHANDONG YANTAI AGRI SCI & TECH INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the finally obtained solid organic fertilizer, organic materials such as silkworm excrement and mushroom slag account for more than 80% of the finished fertilizer, and pigskin extract only accounts for 15-20%, which weakens the significance of green utilization of leather waste and effects

Method used

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  • Method for preparing liquid organic fertilizer by enzymolysis and fermentation of pigskin
  • Method for preparing liquid organic fertilizer by enzymolysis and fermentation of pigskin
  • Method for preparing liquid organic fertilizer by enzymolysis and fermentation of pigskin

Examples

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Effect test

Embodiment 1

[0019] A method for preparing liquid organic fertilizer by enzymolysis and fermentation of pigskin, comprising the following steps:

[0020] (1) Rinse the raw pigskin with clean water until the pH of the washing water used is 6.5, and then physically cut the washed pigskin to make pigskin pieces with a width of no more than 2 cm and a length of no more than 15 cm;

[0021] (2) Add pigskin fragments into the stirring tank, the volume of the added pigskin fragments is 1 / 4 of the volume of the stirring tank, add 1 / 4 tank volume of water, add protease with a specification of 50000u / g, and the amount added is 0.2% of the mass of pigskin fragments, heated to 55°C and stirred for enzymolysis, after the pigskin fragments are completely dissolved, add pigskin fragments of the same quality to continue the enzymolysis, adding four times in total to obtain a polypeptide enzymatic hydrolysis solution;

[0022] (3) Heat the polypeptide enzymatic hydrolysis solution to 70°C to inactivate the...

Embodiment 2

[0026] A method for preparing liquid organic fertilizer by enzymolysis and fermentation of pigskin, comprising the following steps:

[0027] (1) Rinse the raw pigskin with clean water until the pH of the washing water used is 7.2, and then physically cut the washed pigskin to make pigskin fragments with a width of 1 cm and a length of 10 cm;

[0028] (2) Add pigskin fragments into the stirring tank, the volume of the added pigskin fragments is 1 / 4 of the volume of the stirring tank, add 1 / 4 tank volume of water, add protease with a specification of 50000u / g, and the amount added is 2% of the mass of pigskin fragments, heated to 40°C and stirred for enzymolysis, after the pigskin fragments are completely dissolved, add pigskin fragments of the same quality to continue enzymolysis, adding four times in total to obtain polypeptide enzymatic hydrolysis solution;

[0029] (3) Heat the polypeptide enzymatic solution to 80°C to inactivate the protease, then lower the temperature to 4...

Embodiment 3

[0033] A method for preparing liquid organic fertilizer by enzymolysis and fermentation of pigskin, comprising the following steps:

[0034] (1) Rinse the raw pigskin with clean water until the pH of the washing water used is 6.5, and then physically cut the washed pigskin to make pigskin fragments with a width of no more than 1 cm and a length of no more than 15 cm;

[0035] (2) Add pigskin fragments into the stirring tank, the volume of the added pigskin fragments is 1 / 4 of the volume of the stirring tank, add 1 / 4 tank volume of water, add protease with a specification of 50000u / g, and the amount added is 5% of the mass of pigskin fragments, heated to 35°C and stirred for enzymolysis, after the pigskin fragments are completely dissolved, add pigskin fragments of the same quality to continue enzymolysis, adding four times in total to obtain a polypeptide enzymatic hydrolysis solution;

[0036] (3) Heat the polypeptide enzymatic solution to 85°C to inactivate the protease, the...

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Abstract

The invention provides a method for preparing a liquid organic fertilizer by enzymolysis and fermentation of pigskin, which comprises the following steps: (1) rinsing raw pigskin with clear water until the pH value of the used cleaning water is 6.5-8.0, and cutting the cleaned raw pigskin into pigskin fragments; (2) adding the pigskin fragments into a stirring tank, adding water with the same volume as the pigskin fragments, adding protease, heating to 35-60 DEG C, stirring for enzymolysis, and supplementing the pigskin fragments with the same mass for continuous enzymolysis after complete dissolution, with supplementation being performed for four times in total to obtain polypeptide enzymatic hydrolysate; (3) heating the polypeptide enzymatic hydrolysate to 70-90 DEG C to inactivate the protease, then cooling to 30-50 DEG C, adding aminopeptidase, and stirring for enzymolysis to obtain a primary amino acid liquid fertilizer; (4) adding a microbial agent into the primary amino acid liquid fertilizer obtained in the step (3) for fermentation and deodorization to obtain fermentation liquor; and (5) adding boric acid and zinc sulfate into the obtained fermentation liquor, dissolving,sub-packaging, sealing and storing. The prepared liquid organic fertilizer is high in amino acid content, free of concentration treatment and good in fertilizer efficiency.

Description

technical field [0001] The invention relates to a process for preparing organic liquid fertilizer, in particular to a method for preparing amino acid-containing liquid organic fertilizer by using pigskin, and belongs to the technical field of amino acid-containing liquid fertilizer production technology. Background technique [0002] At present, pigskin is an important product of the farming industry and an important raw material for the leather industry. Pigskin processing usually produces about 10% of leftovers, which are currently discarded, resulting in waste and environmental pollution. Pigskin contains more organic matter such as collagen peptides and amino acids, and is the raw material for producing amino acid-containing fertilizers. Amino acid liquid fertilizer can be prepared by enzymatic hydrolysis of pigskin, but because of its low degree of hydrolysis, the content of amino acids in the enzymatic solution is small, the fertilizer efficiency is poor, and it is ea...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/80C05G5/20
CPCC05D9/00C05G3/00
Inventor 姜学玲杨剑超孙晓张占田张广和徐维华
Owner SHANDONG YANTAI AGRI SCI & TECH INST
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