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Organic fertilizer and preparation method thereof

A technology of organic fertilizer and biogas slurry, which is applied in the direction of fertilization equipment, fertilizer mixture, waste fuel, etc., can solve the problems that the effect needs to be studied, cannot fully meet the needs of agriculture, and the fermentation temperature is low, so as to improve the quality and realize the reduction treatment and resource utilization, the effect of prolonging the high temperature period

Inactive Publication Date: 2019-06-04
ACADEMY OF PLANNING & DESIGNING OF THE MINIST OF AGRI
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  • Abstract
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  • Claims
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Problems solved by technology

The invention patent "CN107517609A" uses an agricultural machine tool to spray biogas slurry and turn over and bury the straw and return it to the field to complete the water and nitrogen supplement of the straw. This method increases the processing capacity of the straw, but the biogas slurry consumption is limited.
Invention patent "CN108017452A" uses crop straw, distiller's grains, and feces to add to the treated biogas slurry, and adds microbial agents to ferment. This method prepares biogas slurry biofertilizer, but the fermentation temperature is lower than 35°C, which is better than organic fertilizer. There is a certain gap in the requirements of oxygen fermentation for 4-5 days above 50°C, which cannot fully meet the needs of agriculture.
The invention patent "CN108358672A" utilizes phosphoric acid, sulfuric acid, nitric acid to react with biogas residue, and mixes fermentation with biogas slurry straw to prepare organic fertilizer. The total nutrient content, moisture and pH of organic fertilizer meet the requirements of organic fertilizer. This method is not treated with biogas slurry Therefore, the effect of biogas slurry straw fermentation to prepare organic fertilizers needs to be studied

Method used

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  • Organic fertilizer and preparation method thereof
  • Organic fertilizer and preparation method thereof

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Embodiment 1

[0050] 1) Crush 5kg of corn stalks to a length of about 3cm, fill them in a cylindrical filter, introduce the biogas slurry into the filter at a speed of 5L / h, and recycle the filtered biogas slurry until the concentration of the filtered biogas slurry is equal to When the concentration ratio of the original biogas slurry is close to 0.9, recover the straw saturated with the absorbed biogas slurry;

[0051]2) Mix the adsorbed and saturated straw, biochar, conditioner, and biogas slurry according to the mass ratio of 1:0.2:4.5:0.2875; adjust the moisture content of the mixed material to about 65%, and the C / N to be 25-30; add biochar (Raw materials are crop straw and / or corncobs, wood chips, etc.), the pyrolysis temperature is 550°C, the mixture is placed in a static aerobic fermenter developed by the qualification, and the air is supplied by a small blower, and the air is aerated every 45 minutes. The time is 5min, the ventilation volume is 0.25(L·kg -1 min -1 ), every 3 day...

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Abstract

The invention discloses an organic fertilizer and a preparation method thereof. The preparation method of the organic fertilizer comprises the following steps: mixing straw, which is saturated by adsorbing biogas slurry, with biological carbon and a conditioner to obtain a mixed material pile body, carrying out aerobic fermentation, and spraying the biogas slurry in the fermentation process to obtain the organic fertilizer, and wherein the conditioner is livestock and poultry manure. According to the invention, the biogas slurry and the straw can be recycled, and the straw saturated by adsorbing the biogas slurry, the biological carbon, the conditioner and the biogas slurry are subjected to combined aerobic fermentation, the biomass heat reduced by biomass heat in the composting process, recycling and utilizing of nutrients are realized, and the organic fertilizer can be produced.

Description

technical field [0001] The invention relates to an organic fertilizer and a preparation method thereof, in particular to an organic fertilizer prepared from biogas slurry and a preparation method thereof, and belongs to the technical field of rural energy and environmental protection. Background technique [0002] Biogas slurry reduction and fertilization are hot spots in the research of biogas slurry resource utilization, among which adsorption and recovery of nutrients in biogas slurry and utilization is an effective way, which can not only reduce the treatment of biogas slurry, but also recycle biogas The nutrient resources in the liquid can obtain high value-added economic benefits, avoid secondary pollution to the environment, and promote the healthy development of the bio-natural gas industry. [0003] Crop straw is a by-product of agricultural production, but the utilization rate of straw resources is not only low at present. At present, there have been some studies ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00
CPCY02E50/30
Inventor 丁京涛孟海波沈玉君马艳茹
Owner ACADEMY OF PLANNING & DESIGNING OF THE MINIST OF AGRI
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