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Preparing method for slow-release fertilizer based on nutshell biomass carbon

A slow-release fertilizer and biochar technology, applied in fertilizer mixtures, fertilization devices, applications, etc., can solve the problems of residual pollution, expensive polymer coating materials, etc., and achieve the effect of resource utilization

Inactive Publication Date: 2015-11-11
JIANGSU JINYU ENVIRONMENTAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention: Aiming at the deficiency of the slow-release effect of traditional fertilizers and the disadvantages of expensive polymer coating materials and residual pollution, a preparation method of nut shell biochar-based slow-release fertilizer is provided. Eucommia ulmoides leaf residue is used as raw material to form an organic fertilizer rich in humic acid through fermentation, and then the walnut shell is crushed and carbonized into biochar, and rock sugar starch is mixed with a cross-linking agent to make a viscous coating liquid, which is mixed evenly by a granulator A Nutshell Biochar-Based Slow-release Fertilizer After Granulation and Drying

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0021] Weigh 10 kg of Eucommia leaves, dry them in the sun for 3 days, put them into a jet mill, pass through a 60-mesh steel sieve to obtain Eucommia leaf residue, put the Eucommia leaf residue into a fermenter, inoculate white rot fungus strains, and add quality Glucose solution with a concentration of 50% is used as nutrient solution, sealed and fermented at 28°C for 30 days, after the fermentation is completed, transfer the fermented product into an autoclave, raise the pressure in the pot to 100kPa, autoclave for 10min, and then transfer it to an oven at 105°C The ulmoides ulmoides leaf residue fertilizer rich in humic acid is obtained by drying under high pressure; take 1kg of walnut shells and put them into an ultrasonic cleaner for ultrasonic vibration cleaning for 10 minutes, the ultrasonic power is 100W, and the ultrasonic frequency is 25kHz, and the cleaned walnut shells are dried with a vacuum dryer , into a carbonization furnace at 300°C to carbonize walnut shell b...

example 2

[0024] Weigh 15kg of eucommia leaves, dry them in the sun for 4 days, put them into a jet mill, pass through a 65-mesh steel sieve to obtain eucommia leaf residues, put the eucommia leaf residues into a fermenter, inoculate white rot fungus strains, and add quality Glucose solution with a concentration of 50% is used as the nutrient solution, sealed and fermented at 33°C for 35 days, after the fermentation is completed, the fermented product is transferred to an autoclave, and the pressure inside the pot is increased to 103kPa, after autoclaving for 13 minutes, it is transferred to an oven at 108°C The ulmoides ulmoides leaf residue fertilizer rich in humic acid is obtained by drying under high pressure; take 1 kg of walnut shells and put them into an ultrasonic cleaner for ultrasonic vibration cleaning for 15 minutes, the ultrasonic power is 150W, and the ultrasonic frequency is 30kHz, and the cleaned walnut shells are dried with a vacuum dryer , placed in a carbonization furn...

example 3

[0027]Weigh 20kg of Eucommia leaves, dry them in the sun for 5 days, put them into a jet mill and pass them through a 70-mesh steel sieve to obtain Eucommia leaf residue, put the Eucommia leaf residue into a fermenter, inoculate white rot fungus strains, and add quality Glucose solution with a concentration of 50% is used as nutrient solution, sealed and fermented at 38°C for 40 days, after the fermentation is completed, transfer the fermented product into an autoclave, raise the pressure in the pot to 105kPa, autoclave for 15 minutes, and then transfer it to an oven at 110°C Dry the eucommia ulmoides leaves rich in humic acid fertilizer; take 2kg of walnut shells and put them into an ultrasonic cleaner for ultrasonic vibration cleaning for 20 minutes, the ultrasonic power is 200W, and the ultrasonic frequency is 35kHz, and the cleaned walnut shells are dried with a vacuum dryer , into a carbonization furnace at 700°C to carbonize walnut shell biochar, then crush the biochar in...

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Abstract

The invention relates to a preparing method for slow-release fertilizer based on nutshell biomass carbon and belongs to the field of slow-release fertilizer preparation. According to the method, folium cortex eucommiae leaf residues are used as raw materials to form organic fertilizer rich in humic acid through fermentation, then walnut shells are smashed and carbonized into the biomass carbon, rock candy starch is used for being mixed with a cross-linking agent to prepare the biomass carbon into sticky coating liquid, and the sticky coating liquid is dried to obtain the slow-release fertilizer based on the nutshell biomass carbon after being mixed uniformly and pelleted through a pelletizer. As straw is manufactured into the fertilizer, resources are effectively utilized, and the method is environmentally friendly; fertilizer coatings can decomposed in soil automatically, and nutrient release controlling performance of the fertilizer is not influenced after decomposition; the slow-release fertilizer can be released in the soil automatically, and the validity period can reach 15-20 days.

Description

technical field [0001] The invention relates to a preparation method of a nutshell biochar-based slow-release fertilizer, belonging to the field of slow-release fertilizer preparation. Background technique [0002] Biochar is a kind of highly aromatized refractory solid material formed by pyrolysis and carbonization of plant biomass at a low temperature of 300°C to 700°C. Biochar can increase soil carbon storage, improve soil, improve soil fertility, promote crop production and maintain the balance of soil ecosystem. Not only that, high stability, economy, carbon sequestration and emission reduction, and the specific adsorption and retention characteristics of N, P and other nutrients make it an ideal slow-release fertilizer coating material. [0003] Coated slow-release fertilizer can significantly improve the utilization rate of fertilizer. However, most of the slow-release fertilizers currently on the market are coated with chemically synthesized non-degradable polymers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
CPCY02P20/133
Inventor 李锦宇林大伟
Owner JIANGSU JINYU ENVIRONMENTAL ENG
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