Biological fertilizer and preparation method thereof

Abstract

The invention relates to a preparation method of a novel biological organic fertilizer. The method which can effectively solve the loss of available nutrients in the biological organic fertilizer caused by high temperature in a drying link and has the characteristics of practicality and maneuverability through adding a novel high-quality protein raw material allows the effects of changing harms into goods and wastes into valuables to be reached. The preparation method is simple and effective, costs low and is convenient for popularization. The purpose of the invention is realized with the following technical scheme that the preparation method of the novel biological organic fertilizer comprises the following steps: pretreating livestock and poultry manure, a biogas slurry and biogas slag in a biogas digester, animal fur leftover or other foods containing protein components, and medicine leftover which are treated as raw materials; carrying out multiple fermentation, dehydration, and composting decomposition; crushing, screening, granulating, and drying through metering according to a required proportion after products are qualified by harmless index detection, wherein the drying process is self-designed inverse secondary drying, and the products are rapidly cooled to normal temperature by a shock fluidized bed device; and carrying out screening, low temperature coating and bacterium adding, examining, packaging and metering, and finished product warehousing.

Description

technical field [0001] The invention relates to a bio-organic fertilizer and a preparation method thereof, in particular to a bio-organic fertilizer which uses livestock and poultry manure, biogas slurry and residue in biogas tanks, animal fur leftovers or other protein-containing food and medicine leftovers as raw materials. A bio-organic fertilizer and a preparation method thereof. Background technique [0002] At present, the environmental pollution caused by the use of chemical fertilizers has attracted more and more attention. According to relevant data, in the eutrophication of major lakes in my country, the impact of non-point source pollution from agriculture even exceeds that of industrial pollution. After chemical fertilizers are applied to the soil, in addition to the part absorbed and utilized by crops, a considerable part is lost through leakage, volatilization, nitrification and denitrification, which will inevitably lead to pollution of the atmosphere, water ...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects and deficiencies in the existing preparation methods of bio-organic fertilizers, the present invention provides a novel preparation method of bio-organic fertilizers, which effectively solves the loss of effective nutrients of bio-organic fertilizers caused by high temperature in the drying process, and at the same time It is practical and safe by adding functional beneficial active bacteria