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Low-heavy-metal biogas residue composite organic silicon fertilizer with slow release function and preparation method of low-heavy-metal biogas residue composite organic silicon fertilizer

A technology with low heavy metals and organic silicon, applied in organic fertilizers, inorganic fertilizers, magnesium fertilizers, etc., can solve the problems of single nutrient, can not provide N, P and organic matter, etc., achieve high adsorption capacity, rich surface charge, low production cost Effect

Inactive Publication Date: 2021-07-23
INNER MONGOLIA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, silicon fertilizer is used alone as a fertilizer, which has a single nutrient and cannot provide N, P and organic matter required by crops.

Method used

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  • Low-heavy-metal biogas residue composite organic silicon fertilizer with slow release function and preparation method of low-heavy-metal biogas residue composite organic silicon fertilizer
  • Low-heavy-metal biogas residue composite organic silicon fertilizer with slow release function and preparation method of low-heavy-metal biogas residue composite organic silicon fertilizer
  • Low-heavy-metal biogas residue composite organic silicon fertilizer with slow release function and preparation method of low-heavy-metal biogas residue composite organic silicon fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1: the preparation method of the low-heavy metal biogas residue compound organic silicon fertilizer with slow-release function, it comprises the steps:

[0040] (1) Separation of the upper liquid and the remaining substrate after the pretreatment of the biogas residue: take 500 kg of calcium-magnesium-silicon functional material with hierarchical pore distribution and mix it with 4 tons of biogas residue, stir for 50 minutes and let it stand for 30 minutes, then separate the upper liquid , the remaining substrate is a mixture of the remaining calcium-magnesium-silicon functional materials and biogas residue; wherein, the biogas residue is obtained by co-digesting multiple substrates such as livestock and poultry manure and straw.

[0041] (2) The remaining substrate is dehydrated, dried and ground to prepare the substrate powder; in the present embodiment, after the remaining substrate is put into a screw extruder to remove excess moisture, it is dried in a dr...

Embodiment 2

[0053] Embodiment 2: the preparation method of the low-heavy metal biogas residue composite organic silicon fertilizer with slow-release function, it comprises the steps:

[0054] (1) Separation of the upper liquid and the remaining substrate after the pretreatment of the biogas residue: take 100 kg of calcium-magnesium-silicon functional material with hierarchical pore distribution and mix it with 1 ton of biogas residue, stir for 15 minutes and let it stand for 15 minutes, then separate the upper liquid , the remaining substrate is a mixture of the remaining calcium-magnesium-silicon functional materials and biogas residue; wherein, the biogas residue is obtained by co-digesting multiple substrates such as livestock and poultry manure and straw.

[0055] (2) The remaining substrate is dehydrated, dried and ground to prepare the substrate powder; in the present embodiment, after the remaining substrate is put into a screw extruder to remove excess moisture, it is dried in a dr...

Embodiment 3

[0066] Embodiment 3: the preparation method of the low-heavy metal biogas residue composite organic silicon fertilizer with slow-release function, it comprises the steps:

[0067] (1) Separation of the upper liquid and the remaining substrate after the pretreatment of the biogas residue: take 800 kg of calcium-magnesium-silicon functional material with hierarchical pore distribution and mix it with 8 tons of biogas residue, stir for 100 minutes and let stand for 50 minutes, then separate the upper liquid , the remaining substrate is a mixture of the remaining calcium-magnesium-silicon functional materials and biogas residue; wherein, the biogas residue is obtained by co-digesting various substrates such as livestock manure and straw.

[0068] (2) The remaining substrate is dehydrated, dried and ground to prepare the substrate powder; in the present embodiment, after the remaining substrate is put into a screw extruder to remove excess moisture, it is dried in a drier for 12 hou...

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Abstract

The invention discloses a low-heavy-metal biogas residue composite organic silicon fertilizer with a slow release function and a preparation method thereof. The method comprises the following steps: (1) pre-treating biogas residues, and conducting separating to obtain a supernatant liquid and a residual substrate; (2) dehydrating, drying and grinding the residual substrate to obtain substrate powder; and (3) granulating the substrate powder to prepare the low-heavy-metal biogas residue composite silicon fertilizer finished product. The invention also discloses the low-heavy-metal biogas residue composite organic silicon fertilizer with the slow release function prepared by the method. The fertilizer has the advantages of simple preparation method, low raw material cost, comprehensive nutrients, high effective silicon content and low transferable heavy metal content.

Description

Technical field: [0001] The invention relates to a composite silicon fertilizer and a preparation method thereof, in particular to a low-heavy metal biogas residue composite organic silicon fertilizer with a slow-release function and a preparation method thereof. Background technique: [0002] With the improvement of the scale of the livestock and poultry breeding industry, the huge amount of farming waste discharged has increased pressure on the surrounding environment such as water bodies, soil, and the atmosphere, bringing great adverse effects and environmental hazards. Biogas engineering is currently one of the most widely used solutions in the resource utilization of livestock and poultry farming waste in various countries. However, in addition to biogas production, biogas projects will also produce a huge amount of biogas residues with high water content, which are rich in nutrients such as nitrogen, phosphorus, potassium, and humic acid. After effective treatment, or...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/40C05G3/80C05G5/12
CPCC05D3/02C05G3/00C05G3/40C05G3/80C05G5/12C05D5/00C05D9/00C05F9/04C05F11/00
Inventor 王晓燕王红包亚莉张永锋张印民梁浩东
Owner INNER MONGOLIA UNIV OF TECH
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