Biogas slurry fertilizer and preparation method thereof

Abstract

The invention discloses a biogas slurry fertilizer and a preparation method thereof, and belongs to the technical field of agriculture, the preparation method comprises the following steps: (1) mixing biogas slurry and agricultural enzyme, and fermenting to obtain a mixture; and (2) adding water into the mixture obtained in the step (1) to prepare the biogas slurry fertilizer. The agricultural enzyme is added to treat the biogas slurry, so that the phytotoxicity of the biogas slurry is reduced, the fertilizer effect is improved, the storage time of the biogas slurry is shortened, the emission of irritant gas in the storage process is reduced, the environmental pollution is reduced, and the health of an operator is protected.

Description

technical field [0001] The invention belongs to the technical field of agriculture, and in particular relates to a biogas slurry fertilizer and a preparation method thereof. Background technique [0002] Biogas slurry is rich in easily absorbed nitrogen, phosphorus, potassium and a large amount of humus, which has great utilization potential. At present, the commonly used biogas slurry treatment technologies include: field returning method, constructed wetland method, membrane treatment method, etc. In the method of returning to the field, the biogas slurry is placed in an open-air biogas slurry storage tank, mixed with water, and then applied to the farmland. The artificial wetland method purifies the biogas slurry by simulating the natural ecology of the wetland, but it is easily affected by the season and the environment, and the problem of silting is difficult to solve. Membrane treatment mainly separates biogas slurry from solid and liquid by means of ultrafiltration,...

AI Technical Summary

Problems solved by technology

[0004] However, the current human excrement treatment process still applies the treatment process of livestock and poultry manure, and there is no effective means to inhibit pathogenic bacteria. The temperature of anaerobic fermentation is generally 35°C, which has a low removal rate of pathogenic bacteria in human excrement and urine, and biogas slurry It is rich in ammonia-producing microorganisms, prone to the accumulation of substances such as ammonia and organic acids, which pose a threat to plant growth

The use of open aging ponds in the subsequent treatment of biogas slurry will not only lead to a large loss of nutrients such as nitrogen and phosphorus in the biogas slurry, and reduce the fertilizer effect of the biogas slurry, but also cause pathogenic bacteria in human excrement to spread through the air, causing environmental pollution. Contamination, a threat to the operator's health

In addition, the insufficient decomposition of biogas slurry will also lead to ammonium ions and reducing substances in the biogas slurry.

The above problems lead to phytotoxicity of biogas slurry when it is used as fertilizer, resulting in crop yield reduction, and there are environmental risks that damage the health of operators

Images