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Method for preparing slow-release fertilizer by hydrothermal treatment of pepper branches

A hydrothermal treatment and slow-release fertilizer technology, applied in the field of agricultural engineering, can solve problems such as troublesome branch handling and air pollution, and achieve good environmental benefits and long-lasting fertilizer effects.

Active Publication Date: 2020-06-23
CHONGQING BEYOND OCEAN CARBON MFR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the branches of Zanthoxylum bungeanum have short thorns, it is very troublesome to deal with a large number of branches pruned every year, and burning them on the spot will also cause serious air pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Grind the collected pruned branches of fresh Zanthoxylum bungeanum to a particle size range of 0.2-1 mm; mix the crushed Zanthoxylum bungeanum branches with 25% concentration of ammonium sulfite solution at a liquid-solid ratio of 10:1, and react in a high-pressure reactor at 150°C for 40 minutes; the reaction product is separated from the solid and liquid, and the solid product is washed, dried, and carbonized successively after the solid-liquid separation. The mixture is granulated and dried to obtain slow-release fertilizer granules. The nutrient release rate of the prepared slow-release fertilizer was 7.8% after soaking in static water for 24 hours at 25°C, and the cumulative nutrient release rate in 28 days was 58.4%.

Embodiment 2

[0016] Grind the collected pruned branches of fresh Zanthoxylum bungeanum to a particle size range of 1-3 mm; mix the crushed Zanthoxylum bungeanum branches with 20% concentration of ammonium sulfite solution at a liquid-solid ratio of 7:1, and react in an autoclave at 120°C for 90 Minutes; the solid-liquid separation of the reaction product, after the solid-liquid separation, the solid product is washed, dried, and carbonized successively, and the carbonization temperature is 350 ° C; the carbonized material is mixed with the filtrate, and attapulgite clay with 25% of the carbonized material quality is added as a clay The mixture is granulated and dried to obtain slow-release fertilizer granules. The nutrient release rate of the prepared slow-release fertilizer was 9.2% after soaking in static water for 24 hours at 25°C, and the cumulative nutrient release rate in 28 days was 68.5%.

Embodiment 3

[0018] Grind the pruned branches of the collected fresh pepper to a particle size range of 3-5 mm; mix the crushed pepper branches with a 30% concentration of ammonium sulfite solution at a liquid-solid ratio of 7:1, and react in an autoclave at 120°C for 90 Minutes; the solid-liquid separation of the reaction product, after the solid-liquid separation, the solid product is washed, dried, and carbonized successively, and the carbonization temperature is 350 ° C; the carbonized material is mixed with the filtrate, and attapulgite clay with 25% of the carbonized material quality is added as a clay The mixture is granulated and dried to obtain slow-release fertilizer granules. The nutrient release rate of the prepared slow-release fertilizer was 9.2% after soaking in static water for 24 hours at 25°C, and the cumulative nutrient release rate in 28 days was 68.5%.

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Abstract

The invention discloses a method for preparing a slow-release fertilizer from pepper branches, and solves the problems of branch treatment and disposal of pepper pruning and the like. The preparationmethod comprises the following steps: mixing crushed pepper branches with an ammonium sulfite solution, reacting in a high-pressure reaction kettle at 120-240 DEG C for 20-120 minutes, carrying out solid-liquid separation on the reaction product, drying and carbonizing the separated solid, mixing with a filtrate, adding an adhesive, and granulating to obtain the slow-release fertilizer. Accordingto the method, resource utilization of the pepper trimming waste is achieved, no solid waste is generated or discharged, the fertilizer efficiency of the prepared product is lasting, the soil structure can be improved, and good environmental benefits and economic value are achieved.

Description

technical field [0001] The invention belongs to the technical field of agricultural engineering, and relates to the technical field of agricultural waste treatment and high-value utilization, in particular to a method for preparing slow-release fertilizer by hydrothermal treatment of prickly ash branches. Background technique [0002] Zanthoxylum bungeanum is a small deciduous tree belonging to Rutaceae and Zanthoxylum genus. The skin of Zanthoxylum bungeanum is red in sauce after drying and has a strong aroma of numbness. Zanthoxylum bungeanum needs regular pruning during the growth process to maintain fruit production. Because the branches of Zanthoxylum bungeanum have short thorns, it is very troublesome to deal with a large number of branches pruned every year, and burning them on the spot will also cause serious air pollution. Contents of the invention [0003] The object of the present invention is to provide a kind of method that utilizes Zanthoxylum bungeanum bran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/40C05G5/12
CPCC05D9/00C05G3/00Y02P60/21
Inventor 刘必衍曾惜齐高相
Owner CHONGQING BEYOND OCEAN CARBON MFR
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