Biomass granular carbon-based fertilizer and preparation method thereof

Abstract

The invention discloses a biomass granular carbon-based fertilizer and a preparation method thereof. The fertilizer is prepared from the following components in parts by weight: 20-30 parts of fecal residues, 35-40 parts of a straw mixture, 12-16 parts of castor bean meal, 15-23 parts of furfural residues, 7-9 parts of sulfonated lignin-vinyl acetate, 6-8 parts of arbuscular mycorrhiza, 21-25 parts of medium elements and 4-5 parts of trace elements. The preparation method comprises the following steps: carbonizing and thermally decomposing straw under the protection of nitrogen, controlling the strict anaerobic condition, performing liquefying, fermenting the fecal residues and the furfural residues with methane, performing pre-leaching with alkali liquor, expanding the castor bean meal with steam, and finally, homogenizing, granulating and drying all the materials to obtain the biomass granular carbon-based fertilizer. Methane, hydrogen, carbon monoxide, ethanol, butanol and other fuel are separated by carbonization thermal decomposition and methane fermentation, the added value of biomass raw materials is improved, and the produced carbon-based fertilizer has balanced and comprehensive nutrient elements, can release fertility continuously for a long time, and is easy to be absorbed and utilized by crops.

Description

technical field [0001] The invention relates to the technical field of biomass solid waste treatment, in particular to a biomass granular carbon-based fertilizer and a preparation method thereof. Background technique [0002] Biochar is formed by pyrolysis of wood, grass, corn stalks or other biomass raw materials at high temperature under anaerobic or low oxygen conditions. During the pyrolysis process, wood tar, wood vinegar, combustible gas, etc. are also produced. . The main component of biochar is simple carbon, which is not easy to deteriorate and oxidize. It can improve soil and maintain soil fertility for a long time. However, its microporous structure can gather pathogenic microorganisms and harmful substances and change the physical and chemical properties of soil. Biochar produced by existing technologies Basic fertilizers mainly supplement nitrogen, phosphorus, potassium and other macroelements, while ignoring the medium and microelements required for plant grow...

AI Technical Summary

Problems solved by technology

The main component of biochar is simple carbon, which is not easy to deteriorate and oxidize. It can improve soil and maintain soil fertility for a long time. However, its microporous structure can gather pathogenic microorganisms and harmful substances and change the physical and chemical properties of soil. Biochar produced by existing technologies Basic fertilizers mainly supplement nitrogen, phosphorus, potassium and other large elements, while ignoring the medium and trace elements needed for plant growth, resulting in the disorder of plant physiological functions and growth retardation

[0003] The patent application number is CN201310618380.0, which discloses a special biomass carbon-based compound fertilizer for corn and its preparation method. The carbon-based compound fertilizer is prepared by mixing rapeseed stalk carbon powder and inorganic fertilizers such as powdered urea and urea phosphate. Strong water-retaining and fertilizer-retaining properties, which can release fertility slowly for a long time, but lack of trace elements can easily lead to defective lesions in corn plants, and cannot inhibit the enrichment of pathogenic microorganisms and harmful substances by charcoal powder

The patent application number is CN201710594251.0, which discloses a salix straw biochar-based fertilizer and its preparation method. Release, improve fertilizer utilization rate, but also did not solve the problem of biochar micropores adsorbing pathogenic microorganisms and causing regional disease of plants

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