Method for producing liquid fertilizer from corn steep liquor

A technology of corn steep liquor and liquid, applied in the direction of liquid fertilizer, application, nitrogen fertilizer, etc., can solve the problem of not removing the anti-nutritional effect of phytic acid, achieve the effect of optimizing the adding sequence, improving utilization rate, and reducing pollution

Inactive Publication Date: 2020-09-01
CHAMBROAD CHEM IND RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some patents, corn steep liquor is used to produce organic fertilizer or liquid fertilizer, such as patent CN109305831A, which uses corn steep liquor and lysine fermentation waste liquid to make bio-organic fertilizer, and patent CN107353063A, which uses corn steep liquor to prepare biological compound liquid fertilizer, but does not remove the anti-nutrient of phytic acid function, and did not combine it with thiourea production residues to achieve comprehensive utilization of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of method utilizing corn steep liquor to produce liquid fertilizer:

[0031] (1) Mixing: add thiourea residue to corn steep liquor, the addition amount is to add 1 kilogram of thiourea production residue dry weight to every 5 kilograms of corn steep liquor; heat the mixture to 100 ° C and stir for 3 hours, and the pH of the mixture is completed is 4.5;

[0032] (2) Settling: Settling for 3 hours after stirring, absorb the supernatant, and use the sediment as a raw material for producing organic fertilizer after neutralization;

[0033] (3) Enzymolysis: at a suitable temperature, at 40°C, first use protease for 2 hours, and at 50°C, then use phytase for 2 hours, the amount of protease is 0.5‰ (w / w), phytic acid The enzyme dosage is 1‰ (w / w), and the treatment solution is obtained after hydrolysis;

[0034] (4) Addition of medium and trace elements: 50g of anhydrous magnesium sulfate, 15g of sodium octaborate tetrahydrate, 10g of manganese sulfate, 20g of iron su...

Embodiment 2

[0038] A kind of method utilizing corn steep liquor to produce liquid fertilizer:

[0039] (1) Mixing: add thiourea residue in corn steep liquor, the addition amount is to add 1 kilogram of thiourea production residue dry weight in every 3 kilograms of corn steep liquor. Heat the mixture to 70°C and stir thoroughly for 3 hours; the pH of the mixture is 6 after mixing;

[0040](2) Settling: Settling for 2 hours after stirring, absorb the supernatant, and use the sediment as a raw material for producing organic fertilizer after neutralization;

[0041] (3) Enzymolysis: at a suitable temperature, at 50°C, first use protease for 1 hour, and at 60°C, then use phytase for 1 hour, the amount of protease is 1.5‰ (w / w), phytic acid The enzyme dosage is 2‰ (w / w), the enzymolysis temperature is 50°C and 60°C respectively, and the treatment solution is obtained after hydrolysis;

[0042] (4) Addition of medium and trace elements: 100g of anhydrous magnesium sulfate, 8g of sodium octabor...

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PUM

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Abstract

The invention belongs to the technical field of fertilizer production. The invention particularly relates to a method for producing a liquid fertilizer by utilizing corn steep liquor. The method comprises the following steps: by taking corn steep liquor as a main raw material, adding thiourea production residues, mixing, settling to obtain a supernatant, sequentially carrying out enzymolysis on macromolecular protein and phytase in the corn steep liquor by using acid protease and phytase, and finally sequentially chelating medium trace elements to obtain the medium trace element liquid fertilizer with comprehensive nutrition. The liquid fertilizer disclosed by the invention is simple and convenient in production process, stable in product quality, safe and efficient, the problem of resource utilization of corn steep liquor and thiourea production residues is solved, the liquid fertilizer suitable for commercial crops is also produced, and the liquid fertilizer has good social benefits,environmental benefits and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of fertilizer production, and in particular relates to a method for producing liquid fertilizer by using corn steep liquor. Background technique [0002] Corn steep liquor is a by-product of the production of corn starch by wet process. When producing corn starch, the purified corn needs to be soaked in water and then dehydrated, and then soaked in 0.20% to 0.25% sulfurous acid solution for 60 to 70 hours. ), the dilute corn steep liquor is concentrated into corn steep liquor with a dry matter content exceeding 40% through an evaporation process. After soaking, the corn is crushed, degermed, defibrated and dried to form cornstarch. During the corn soaking process, due to the action of the sulfurous acid solution, the corn skin forms a "semi-permeable membrane", and the soluble nutrients in the corn, such as soluble protein, free fatty acids, soluble sugars and vitamins, can pass through the "semi-permeable...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G5/20
CPCC05C9/00C05G3/00C05G5/20C05C11/00C05D3/00C05D3/02C05D5/00C05D9/02C05F11/00
Inventor 陈振发刘海玉和富明何雄杨传伦车树刚李浩刘结磊
Owner CHAMBROAD CHEM IND RES INST CO LTD
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