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Method for preparing bio-composite liquid fertilizer from corn steep liquor

A compound liquid and corn steep liquor technology, applied in urea compound fertilizer, organic fertilizer, inorganic fertilizer, etc., can solve the problems of reduced fertilizer supply capacity, resource waste environment, and decreased fertilization benefit, so as to achieve good absorption and utilization, and improve nutritional structure , the effect of important social significance

Inactive Publication Date: 2017-11-17
SHANDONG FOOD & FERMENT IND RES & DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to make up for the deficiencies of the prior art, solve the problems of waste of resources and environmental pollution caused by the direct discharge of corn steep liquor in the prior art, as well as the problems of soil acidification and hardening caused by excessive use of chemical fertilizers, reduced fertilizer supply capacity, and declining fertilization benefits year by year, the present invention provides A method for preparing biological compound liquid fertilizer by using corn steep liquor

Method used

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  • Method for preparing bio-composite liquid fertilizer from corn steep liquor
  • Method for preparing bio-composite liquid fertilizer from corn steep liquor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] At a stirring speed of 200r / min, add saturated lime water to the corn steep liquor until the pH value of the corn steep liquor reaches 9, filter to remove calcium sulfate and excess calcium hydroxide.

[0035] Take the filtered corn steep liquor, add alkaline protease at 45000U / g (calculated according to the protein content in corn steep liquor) at 65°C, and perform constant temperature enzymatic hydrolysis for 3 hours. Then use 5mol / L hydrochloric acid to adjust the pH of the enzymolysis solution to 7. When the temperature of the enzymolysis solution is 60°C, add papain at 15000U / g (calculated according to the protein content in corn steep liquor), and perform constant temperature enzymolysis for 4 hours. Under these conditions, the proteolysis rate of corn steep liquor was about 42.67%.

[0036] Add 3% superphosphate, 1.5% potassium chloride, 1.5% dipotassium hydrogen phosphate, 0.05% ammonium molybdate, 0.015% boric acid, and 5% urea to the enzymatic solution of corn...

Embodiment 2

[0039] At a stirring speed of 100r / min, add saturated lime water to the corn steep liquor until the pH value of the corn steep liquor reaches 9, filter to remove calcium sulfate and excess calcium hydroxide.

[0040] Take the filtered corn steep liquor, add alkaline protease at 40000U / g under the condition of 62°C, and perform constant temperature enzymatic hydrolysis for 3h. Then use hydrochloric acid to adjust the pH of the enzymolysis solution to 7, when the temperature of the enzymolysis solution is 60°C, add papain at 12000U / g, and perform constant temperature enzymolysis for 3 hours. Under these conditions, the proteolysis rate of corn steep liquor was about 40.24%.

[0041] Add 2% superphosphate, 2% potassium chloride, 1% dipotassium hydrogen phosphate, 0.1% ammonium molybdate, 0.01% boric acid, and 5% urea to the enzymatic solution of corn steep liquor, and mix well.

[0042] Under the conditions of 70°C and 20MPa pressure, the enzymolysis solution is subjected to hig...

Embodiment 3

[0044] At a stirring speed of 300r / min, add saturated lime water to the corn steep liquor until the pH value of the corn steep liquor reaches 9, filter to remove calcium sulfate and excess calcium hydroxide.

[0045] Take the filtered corn steep liquor, add alkaline protease at a rate of 48000U / g at 63°C, and perform constant temperature enzymatic hydrolysis for 2 hours. Then use hydrochloric acid to adjust the pH of the enzymolysis solution to 7. When the temperature of the enzymolysis solution is 58°C, add papain at 10,000 U / g and perform constant temperature enzymolysis for 4 hours. Under these conditions, the proteolysis rate of corn steep liquor was about 40.40%.

[0046] Add 4% superphosphate, 1.5% potassium chloride, 1.5% dipotassium hydrogen phosphate, 0.1% ammonium molybdate, 0.015% boric acid, and 4% urea to the enzymatic solution of corn steep liquor, and mix well.

[0047] Under the conditions of 70°C and 20MPa pressure, the enzymolysis solution is subjected to high...

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Abstract

The invention discloses a method for preparing bio-composite liquid fertilizer from corn steep liquor and belongs to the field of the bio-composite liquid fertilizer. The method comprises the following steps: 1) removing excessive sulfite, adding saturated lime water to the corn steep liquor and regulating pH of the liquor to 9-10; 2) filtering the corn steep liquor treated in the step 1) to remove calcium sulfate and calcium hydroxide and obtain a corn steep liquor filtrate; 3) adding alkaline protease to the corn steep liquor filtrate obtained in the step 2) for enzymolysis, regulating pH to 7 after enzymolysis with the alkaline protease, and adding papain for enzymolysis; 4) adding calcium superphosphate, potassium chloride, dipotassium phosphate, ammonium molybdate, boric acid and urea to an enzymatic hydrolysate obtained in the step 3) for compounding. The method has the advantages as follows: effective ingredients in the corn steep liquor can be used effectively, and plants can obtain more sufficient nutrition; meanwhile, with use of the bio-composite liquid fertilizer, phenomena such as land acidification, hardening and the like in a chemical fertilizer use process can be avoided.

Description

technical field [0001] The invention relates to the field of biological compound liquid fertilizer, in particular to a method for preparing biological compound liquid fertilizer by using corn steep liquor. Background technique [0002] my country is recognized as a major corn producer in the world, and its production capacity is second only to the United States. From 2008 to 2015, my country's corn production continued to grow. In 2015, the corn production reached 224.58 million tons, an increase of 3.4% compared with 2014. The ratio of inventory consumption at the end of the year was 172.35%. The compound growth rate of corn production from 2011 to 2016 was 6.3%. The serious overcapacity of the industry has caused many problems, such as huge corn stocks and inversion of domestic and foreign prices. Promoting the development of corn intensive processing industry is an important guiding ideology to solve this problem. [0003] Corn deep processing has been developing in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00
CPCC05B1/02C05B7/00C05C3/00C05C9/00C05C11/00C05D1/02C05D9/02C05F11/00
Inventor 徐慧刘建军李文婧田延军刘丽萍高淑娟
Owner SHANDONG FOOD & FERMENT IND RES & DESIGN INST
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