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A method and application of slow-release fertilizer coating prepared from lignocellulosic ethanol fermentation residue

A technology for ethanol fermentation and slow-release fertilizers, applied in application, fertilizer mixtures, layered/coated fertilizers, etc., can solve problems such as high cost, secondary pollution of soil, complex process, etc., achieve low cost, improve soil properties, The effect of simple preparation method

Active Publication Date: 2020-11-17
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although considerable achievements have been made in the research process of slow-release fertilizers at home and abroad, many products of slow-release fertilizers still have certain defects, the process is complicated, and the cost is high. Good slow-release effect, but easy to cause secondary pollution to the soil

Method used

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  • A method and application of slow-release fertilizer coating prepared from lignocellulosic ethanol fermentation residue
  • A method and application of slow-release fertilizer coating prepared from lignocellulosic ethanol fermentation residue
  • A method and application of slow-release fertilizer coating prepared from lignocellulosic ethanol fermentation residue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The lignocellulosic ethanol fermentation residue is dried and pulverized, and passed through a 100-mesh sieve for later use. Take 20g of dried and pulverized lignocellulosic ethanol fermentation residue and put it into a 500mL three-neck flask, add 80mL of pure water for mixing, use NaOH solution to adjust the pH to 8.0, and place it in an ultrasonic cleaner for 6 hours.

[0037] Add 5 g of acetic anhydride to a three-neck flask containing the solution of lignocellulosic ethanol fermentation residue, and mechanically stir for 6 hours in a constant temperature water bath at 90°C.

[0038] Slowly add 10 g of polyvinyl alcohol (AH-26, alcoholysis degree: 98%) into 90 mL of pure water, stir rapidly while adding, and gradually raise the temperature from room temperature to 40°C.

[0039] The polyvinyl alcohol solution is slowly added dropwise to the lignocellulosic ethanol fermentation residue and the acetic anhydride solution, in a water bath at 90° C., and mechanically sti...

Embodiment 2

[0041] The lignocellulosic ethanol fermentation residue is dried and pulverized, and passed through a 100-mesh sieve for later use. Take 20g of dried and pulverized lignocellulosic ethanol fermentation residue and put it into a 500mL three-neck flask, add 80mL of pure water for mixing, use NaOH solution to adjust the pH to 8.0, and place it in an ultrasonic cleaner for 6 hours.

[0042] In the three-necked flask containing the residue solution of lignocellulosic ethanol fermentation, 5 g of formaldehyde solution was slowly added dropwise, and mechanically stirred for 6 hours in a constant temperature water bath at 90°C.

[0043] Slowly add 10 g of polyvinyl alcohol (AH-26, alcoholysis degree: 98%) into 90 mL of pure water, stir rapidly while adding, and gradually raise the temperature from room temperature to 40°C.

[0044] The polyvinyl alcohol solution is slowly added dropwise to the residue of lignocellulosic ethanol fermentation and formaldehyde solution, in a 90° C. water...

Embodiment 3

[0046]The lignocellulosic ethanol fermentation residue is dried and pulverized, and passed through a 100-mesh sieve for later use. Take 20g of dried and pulverized lignocellulosic ethanol fermentation residue and put it into a 500mL three-neck flask, add 80mL of pure water for mixing, use NaOH solution to adjust the pH to 8.0, and place it in an ultrasonic cleaner for 6 hours.

[0047] Add 5 g of citric anhydride to a three-necked flask containing a solution of lignocellulosic ethanol fermentation residue, and mechanically stir for 6 hours in a constant temperature water bath at 90°C.

[0048] Slowly add 10 g of polyvinyl alcohol (AH-26, alcoholysis degree: 98%) into 90 mL of pure water, stir rapidly while adding, and gradually raise the temperature from room temperature to 40°C.

[0049] The polyvinyl alcohol solution is slowly added dropwise to the lignocellulosic ethanol fermentation residue and citric anhydride solution, in a 90° C. water bath, and mechanically stirred for...

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Abstract

The invention discloses a method for preparing a slow-release fertilizer coating from fermentation residues of wood fibers for ethanol production and an application. The fermentation residues of the wood fibers for ethanol production are used as a raw material for the first time for preparing the slow-release fertilizer coating which is environment-friendly, low in cost and simple and easy to produce on industrial scale, and slow-release fertilizer prepared from the slow-release fertilizer coating in combination with a fertilizer core has the advantages that the slow-release effect is optimum, the soil performance is improved, and the slow-release period is long.

Description

technical field [0001] The invention belongs to the field of preparation of slow-release fertilizer coatings, in particular to a method and application for preparing slow-release fertilizer coatings from lignocellulosic ethanol fermentation residues. Background technique [0002] More than 60% of the lignocellulosic ethanol fermentation residue is lignin, and about 10% is undegraded fiber, which is rich in protein, yeast, N, P, S and other nutrients left by E. coli. For every ton of ethanol produced in the process of lignocellulosic ethanol conversion, about 1.5-2 tons of residues are produced, and the effective utilization of residues has become a bottleneck restricting the development of lignocellulosic ethanol technology. [0003] Crop growth requires mineral nutrients, and sufficient nutrients must be provided in order to obtain high yields. Therefore, the application of chemical fertilizers has become an important means of increasing crop production. The low utilizatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/40C05G5/30C05G3/00
CPCC05G5/30
Inventor 张林陈介南王挥詹鹏闫豪刘进陈石兰
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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