Method for circularly using agricultural wastes and producing organic fertilizers

Abstract

The invention belongs to the technical field of cyclic utilization of agricultural wastes, and provides a method for circularly using agricultural wastes and producing organic fertilizers. The method comprises the following steps: with the adoption of a dry type anaerobic fermentation technology, generating biogas by livestock wastes and crop straws through anaerobic fermentation; deodorizing and decomposing materials by means of natural microorganisms and inoculated microorganisms, wherein fermentation is fast in speed, short in period and easy to operate mechanically; meanwhile, recovering the biogas slurry for next anaerobic fermentation inoculum; generating electricity by biogas to provide energy sources to heat an anaerobic fermentation tank in low temperature seasons and meanwhile, providing an electric energy to production of organic fertilizers; adjusting nutrients and moisture of biogas residue and adding a leavening agent and converting the biogas residue into the organic fertilizers through a secondary static composting process. In the whole production process, substances and energies are recycled without secondary pollution, so that wastes are recycled, harmless and ecological, and substances and energies are recycled. Huge social, ecological and economical benefits can be generated, so that the method has stronger popularization and application values.

Description

technical field [0001] The invention belongs to the technical field of agricultural waste recycling, in particular to a method for recycling agricultural waste and producing organic fertilizer. Background technique [0002] In recent years, my country's aquaculture industry has developed rapidly, and is developing in the direction of specialization, scale, and intensification. At the same time, more and more wastes are discharged from the aquaculture industry, and livestock manure contains a large amount of organic pollutants. . [0003] Large-scale livestock and poultry breeding has become the main source of environmental pollution in my country's rural areas, causing enormous pressure on the ecological environment, and has also become one of the main obstacles restricting the sustainable development of the breeding industry. At the same time, due to the widespread use of gas in developed areas to replace traditional crop stalks as fuel. [0004] Therefore, the comprehensi...

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Problems solved by technology

[0005] The invention provides a method for recycling agricultural waste and producing organic fertilizer, aiming to solve the problem that large-scale livestock and poultry breeding has become the main source of environmental pollution in rural areas of our country, causing huge pressure on the ecological environment and restricting the sustainable development of the breeding industry At the same time, the traditional anaerobic fermentation of livestock and poultry manure to produce biogas is greatly affected by seasons, the utilization technology of biogas slurry is not mature enough, the production of organic fertilizer is greatly affected by climate, the control of odor is poor, and the composting time is long, which is harmful to pathogenic bacteria and insects in waste. Incomplete killing of eggs, etc., which affects the quality of organic fertilizer products

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