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A kind of liquid compound fertilizer and its preparation method and application

A compound fertilizer, liquid technology, applied in liquid fertilizer, application, phosphate fertilizer and other directions, can solve the problems of nitrogen and organic nutrient loss, and achieve the effect of reducing volatilization loss, cost, and volatilization loss.

Active Publication Date: 2021-10-26
SHANGHAI ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing methods of using aquaculture wastewater to produce liquid fertilizers are mainly based on biogas slurry, and before being mixed and configured into liquid fertilizers, acidification, oxidation, and flocculation substances need to be put into pretreatment to achieve deodorization and reduce the amount of aquaculture wastewater. The effect of ammonia nitrogen content, such as a multifunctional liquid compound fertilizer produced from biogas slurry and its preparation method (CN.108863503A), a method of producing liquid fertilizer from biogas slurry (CN.108314536A) and a method of producing liquid fertilizer from biogas slurry The method of compound fertilizer (CN.103524176A), etc., when adding new substances, will also cause the loss of nitrogen and organic matter nutrients in the aquaculture wastewater itself

Method used

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  • A kind of liquid compound fertilizer and its preparation method and application
  • A kind of liquid compound fertilizer and its preparation method and application
  • A kind of liquid compound fertilizer and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The fresh biogas slurry is directly taken from the biogas slurry fermentation tank, and the biogas slurry is subjected to solid-liquid separation to remove solid impurity particles larger than 0.25mm in size. The nutrient content was measured, and the results were: pH 8.7, COD 19212g / kg, total nitrogen 1222mg / L, total phosphorus 96.2mg / L, and total potassium 1088mg / L.

[0025] Table 1 Effect of pretreatment adding different concentrations of potassium persulfate on nutrient properties of biogas slurry

[0026]

[0027] Table 1 shows the changes in nutrient properties of biogas slurry after pretreatment with different concentrations of potassium persulfate. The 4 concentrations were aerated intermittently for 2 hours, then left for 2 hours, and then continued to aerate. After a total reaction time of 12 hours, the color of the solution became lighter and the odor disappeared. The results showed that the pH of the biogas slurry became neutral or acidic after adding fo...

Embodiment 2

[0031] The biogas slurry is obtained from the biogas slurry storage tank, and the biogas slurry is subjected to solid-liquid separation to remove solid impurity particles larger than 0.25mm in size. The nutrient content was measured, and the results were: pH8.8, COD8651g / kg, total nitrogen 287mg / L, total phosphorus 32.5mg / L, and total potassium 839mg / L.

[0032] Table 2 Effect of adding different concentrations of potassium hydrogen persulfate in pretreatment on nutrient properties of biogas slurry

[0033]

[0034] Table 2 shows the changes in nutrient properties of biogas slurry after pretreatment with different concentrations of potassium persulfate. The 4 concentrations were intermittently aerated for 2 hours, then left for 2 hours, and then continued to aerate. After a total reaction time of 6 hours, the color of the solution became lighter and transparent, and the odor disappeared. The results showed that after 0.3wt%, 0.5wt%, and 0.8wt% potassium persulfate treatmen...

Embodiment 3

[0038] The vesicle manure solution is obtained from the vesicle manure storage tank, and it is subjected to solid-liquid separation to remove solid impurity particles larger than 0.25 mm in size. The nutrient content was measured, and the results were: pH 7.6, COD 2654g / kg, total nitrogen 194mg / L, total phosphorus 29.3mg / L, and total potassium 641mg / L.

[0039] Table 3 Effect of adding different concentrations of potassium hydrogen persulfate pretreatment on nutrient properties of blistered manure solution

[0040]

[0041]Table 3 shows the changes in the nutrient properties of the vesicular manure solution after pretreatment with different concentrations of potassium persulfate. The 4 concentrations were aerated for 2 hours and then placed for 2 hours. After a total reaction time of 4 hours, the color of the solutions became lighter and more transparent, and the odor disappeared. The results showed that after treatment with four concentrations of potassium hydrogen persul...

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Abstract

The invention discloses a liquid compound fertilizer and a preparation method and application thereof. The liquid compound fertilizer comprises the following components and parts by weight: 10-50 parts of urea, 10-40 parts of potassium dihydrogen phosphate, potassium chloride or potassium sulfate 10 to 40 parts, 1 to 10 parts of polyglutamic acid, 1 to 5 parts of boric acid, and 100 parts of aquaculture wastewater. The liquid compound fertilizer disclosed in the present invention has low cost and simple preparation method, and can significantly improve the yield of grain crops and green leafy vegetables.

Description

technical field [0001] The invention belongs to the field of fertilizers, in particular to a liquid compound fertilizer utilizing breeding wastewater. Background technique [0002] With the rapid development of animal husbandry and aquaculture in my country, a large amount of aquaculture wastewater is produced, which poses a serious threat to the atmospheric environment of water bodies. But from a biological point of view, aquaculture wastewater is a nutrient solution rich in nitrogen and phosphorus, rich in nitrogen, phosphorus, and potassium, and the biogas slurry even contains various amino acids, vitamins, proteins, and vitamin B12. Reasonable utilization of resources is of great significance. Studies have shown that the reasonable return of biogas slurry and blister manure to the field can improve soil fertility and buffering capacity, and promote the balanced growth of soil microorganisms; biogas slurry can also inhibit and kill pathogenic bacteria and insect pests. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G1/00
CPCC05B7/00C05G5/20
Inventor 张翰林吕卫光郑宪清白娜玲李双喜张娟琴张海韵
Owner SHANGHAI ACAD OF AGRI SCI
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