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Method for preparing efficient organic fertilizer

A production method and technology for organic fertilizers, which are applied in the preparation of organic fertilizers, organic fertilizers, and bio-organic part treatment, etc., can solve problems such as unfavorable soil remediation, inability to decompose, and secondary environmental pollution, and reduce environmental pollution problems and costs. Low, high utilization effect

Inactive Publication Date: 2017-08-04
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, although the biogas slurry and biogas residue produced in the anaerobic fermentation process are rich in nutrients, there is a problem of secondary environmental pollution when used directly
As a porous substance, biochar can effectively adsorb a variety of substances. However, the direct use of biochar cannot be decomposed in the soil or absorbed by plants, which is not conducive to soil restoration.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1) The biogas residue after anaerobic digestion of corn stalks and pig manure is dried in the sun, crushed, passed through a 20-mesh sieve (take the sieve rate), and dried at 105°C for later use;

[0017] 2) Biogas residue was calcined at high temperature to produce biochar. The calcination conditions were: high-temperature tube furnace, heating under nitrogen atmosphere, pyrolysis heating rate of 25°C / min, and pyrolysis temperature of 600°C for 3 hours. Cool, dry, grind, sieve through an 80-mesh sieve, and dry and store for later use;

[0018] 3) Preparation of phosphorus-rich carrier: Soak the chicken in biogas solution with a solid-to-liquid ratio of 1:2, mix well, seal, and compost at 70-80°C for 7 days at high temperature;

[0019] 4) Cow manure and chicken manure, dried in the sun, crushed, passed through a 20-mesh sieve (taking the sieve rate), and stored for later use;

[0020] 5) Mix biochar, livestock and poultry manure, and phosphorus-rich carriers in propor...

Embodiment 2

[0022] 1) Dry the biogas residue after anaerobic digestion of corn stalks, wheat stalks and chicken manure, crush them, pass through a 20-mesh sieve (take the sieve rate), and dry them at 105°C for later use;

[0023] 2) Biogas residue was calcined at high temperature to produce biochar. The calcination conditions were: high-temperature tube furnace, heating under nitrogen atmosphere, pyrolysis heating rate of 25°C / min, and pyrolysis temperature of 600°C for 3 hours. Cool, dry, grind, sieve through an 80-mesh sieve, and dry and store for later use;

[0024] 3) Preparation of phosphorus-rich carrier: soak pork in biogas solution, with a solid-to-liquid ratio of 1:10, mix well, seal, and compost at 70-80°C for 15 days at high temperature;

[0025] 4) Pig manure and chicken manure, dried in the sun, crushed, passed through a 20-mesh sieve (taking the sieve rate), and stored for later use;

[0026] 5) Mix biochar, livestock and poultry manure, and phosphorus-rich carriers in prop...

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Abstract

The invention discloses a method for preparing an efficient organic fertilizer from biogas slurry, biogas residues, livestock excrement, food animal meat and the like. The efficient organic fertilizer is characterized by being prepared from biogas slurry, biogas residues, livestock excrement, food animal meat and the like as raw materials, wherein the organic fertilizer comprises the following components in percentage by mass: 15-205 of biogas residues, 60-70% of livestock excrement, 5% of food animal meat and 5% of humic acid; every ton of the organic fertilizer is added with 1-5% of a straw hydrolytic acidification liquid. The efficient organic fertilizer disclosed by the invention is prepared by using methods of high temperature composting and high temperature hydrolytic acidification. The efficient organic fertilizer can be directly returned to fields, needs no top dressing and has the characteristics of being low in cost, high in efficiency, green and environmental-friendly, the problem of point source pollution caused by the biogas slurry, the biogas residues, the livestock excrement, the food animal meat and the like is solved, the problem of secondary pollution caused by direct field returning is reduced, and the preparation time and preparation cost of the organic fertilizer can be greatly shortened.

Description

technical field [0001] The invention relates to the technical field of biological fertilizers, in particular to a preparation method of high-efficiency organic fertilizers. Background technique [0002] The use of chemical fertilizers in my country's agriculture is large, soil organic matter is seriously degraded, and soil arable land is hardened. At the same time, although the biogas slurry and biogas residue produced in the anaerobic fermentation process are rich in nutrients, there is a problem of secondary environmental pollution when used directly. As a porous substance, biochar can effectively adsorb a variety of substances. However, the direct use of biochar cannot be decomposed in the soil or absorbed by plants, which is not conducive to soil restoration. [0003] In order to solve the above-mentioned problems in agricultural production and give full play to the advantages of biochar, the present invention uses biogas residues as raw materials to prepare biochar, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/04C05F17/00C05G3/80
CPCC05D9/00C05F17/00C05G3/80C05F1/00C05F3/00C05F9/04Y02E50/30Y02W30/40
Inventor 杨茜鞠美庭李维尊陈昱侯其东黄访
Owner NANKAI UNIV
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