Method for production of organic fertilizer by utilizing pig manure

Abstract

The invention discloses a method for production of an organic fertilizer by utilizing pig manure. The method comprises the following steps: A, pretreatment of raw material: the pig manure is used as raw material, the carbon-nitrogen ratio is adjusted to 28, the moisture content of the raw material is reduced to 60 percent, and EM strains are added; B, compost fermentation: compost fermentation is performed by adopting an aerobiotic windrow type composting technology; C, postprocessing of compost products: the moisture is reduced to be below 30 percent, particles can pass through a sieve with 60 mesh, and microelements or functional microorganisms are add for adjustment; D, packaging and storing of finished products. The organic fertilizer produced with the method is excellent in product quality, and is in strict conformance with the national standards and industrial standards of the commercial organic fertilizer: the organic content is not less than 45 percent, the total nutrient content is not less than 5 percent, the moisture content is not greater than 30 percent, and the pH value is 5.5-8.5; the death rate of ova of roundworms is not less than 98 percent, and the number of manure coli-group is not greater than 50 unit / g; in the produced organic fertilizer, in per kilogram of dry matters, the heavy metal content standards of the product are as follows: As is not greater than 30, Hg is not greater than 5, Pb is not greater than 100, Cd is not greater than 3 and Cr is not greater than 300.

Description

Technical field: [0001] The invention relates to a method for producing organic fertilizer, in particular to a method for producing organic fertilizer by using pig manure, and belongs to the technical field of deep processing of organic fertilizer. Background technique: [0002] With the development of animal husbandry and the rapid increase of large-scale pig farms and pig breeding areas, the subsequent large amount of pig manure disposal has become a major problem in animal husbandry. In the past, it was mainly ecological utilization, and the pig manure was directly returned to the field. With the development of biological fermentation technology, the use of pig manure to produce bio-organic fertilizer has become a new measure. The use of pig manure to produce organic fertilizer not only solves the environmental pollution caused by a large amount of pig manure accumulation, but also provides the necessary organic fertilizer for the development of green organic agriculture....

AI Technical Summary

Problems solved by technology

However, the natural composting of pig manure to produce organic fertilizer not only takes a long time, but also causes a large amount of nutrients to be volatilized and lost during the composting process due to the unreasonable carbon-nitrogen ratio, and also causes air pollution.