Method for rapidly preparing organic fertilizer

Abstract

The invention relates to a method for rapidly preparing organic fertilizer. By means of a near-critical water technology, no leavening agent or catalyst or anti-corrosion agent is used, the functionsof acid catalysis and base catalysis of livestock excrement and water are only utilized, the fertilizer is prepared from the livestock excrement and straw, the product is acidic and contains a large mount of nitrogen, phosphorus, potassium, organic nutritional ingredients and biomass carbon, centrifugal dehumidification is performed, a dry basis meets the requirements of NY525-2012 organic fertilizer and GB / T23349-2009 ecological indexes of arsenic, cadmium, lead, chromium and mercury in fertilizer, and the product serves as the organic fertilizer. In this way, the livestock excrement can become thoroughly decomposed rapidly, the livestock excrement can be rapidly converted, the volume of the water storage tank is reduced, a fermenting tank is canceled, the pig house building cost and occupied area are lowered, the economical efficiency is fully embodied, and the environment problem can be solved; meanwhile, both production and income are increased for crops, the huge economic benefitis brought, and meanwhile the method has the important ecological benefit and social benefit.

Description

Technical field [0001] The invention belongs to the technical field of fertilizer preparation, and specifically relates to a method for quickly preparing organic fertilizer. Background technique [0002] In recent years, with the development of large-scale and intensive breeding farms, the continuous advancement of agricultural modernization and the increase of grain output, the amount of organic wastes such as livestock and poultry excrement and crop straws has been increasing. The current annual discharge of livestock and poultry excrement in my country is 4 billion tons, but its harmless, resource-based, and commercialized disposal rate is only about 30%; the national annual output of crop straw is about 900 million tons, although the resource utilization rate has been More than 69%, but only 14.8% as fertilizer, both resource utilization and fertilizer utilization need to be improved. [0003] Poultry excrement pollution is the most prominent problem of environmental pollution ...

AI Technical Summary

Problems solved by technology

[0009] CN104628426A discloses a "method and device for preparing organic fertilizer by rapid fermentation of kitchen and agricultural waste", which not only needs to add lime and starter, but also requires more than 48 hours of decomposing time, long time, cumbersome process and complicated equipment

[0010] However, the above technologies are difficult to ensure that large-scale livestock and poultry farms can completely process the livestock and poultry excrement produced on the same day under the premise of meeting the national environmental protection requirements, without causing pollution to the environment.