Production technology for producing solid organic fertilizer from anaerobic biogas residues

Abstract

The invention discloses a production technology for producing a solid organic fertilizer from anaerobic biogas residues. The technology comprises the following steps: blending of raw materials, distribution and aerobic fermentation of the obtained mixture, secondary aging of a material obtained after the aerobic fermentation, preparation of a powdery fertilizer, and preparation of the granular fertilizer. The production technology provided by the invention is perfect and economical, rationally utilizes biogas residues and straws, and also has the advantages of short production cycle, energy saving and environmental protection. The organic fertilizer produced by the technology has a high production efficiency and a good fertility.

Description

technical field [0001] The invention relates to the technical field of organic fertilizers, in particular to a production process for producing solid organic fertilizers using anaerobic biogas residues. Background technique [0002] After years of research and practice, it has been proved that the organic waste generated in people's lives and the environment, such as: organic matter sorted from domestic waste, crop straw, forest leaves, green vegetation clippings, kitchen waste, poultry manure etc. The most realistic and effective treatment method is dry anaerobic fermentation, which will produce biogas, biogas slurry and biogas residue after fermentation. Among them: biogas can be used for gas-fired power generation; biogas slurry can be used for production after sewage treatment reaches the standard; and how to effectively use biogas residue rich in nutrients to turn waste into treasure and maximize economic and environmental benefits And social benefit is a big problem a...

AI Technical Summary

Problems solved by technology

[0004] my country is a large agricultural country, and is gradually accelerating the process of urbanization. The current problems are: first, the output of various agricultural crop straws is very high, and at least 70% of them are not effectively used, and they are still mainly burned in the fields, causing a large number of straws. Waste of resources and environmental pollution; second, the level of urban and rural greening has been continuously improved, and green vegetation, grass cuttings and tree leaves have increased year by year; third, the breeding industry has continued to develop, and poultry manure has gradually increased

This method takes as long as 5-6 months to pretreat biogas residues, and adopts air-drying and solidification, which has low solidification efficiency and cannot make full use of straw, etc.

Chinese patent document CN101229982A (200810014630.9) discloses a method of using biogas residue to produce organic compound fertilizer. Straw is added to biogas residue to prepare organic fertilizer. However, the straw is not decomposed, so that the organic fertilizer cannot be fully utilized, and it will increase pests and diseases.

[0008] At present, the use of biogas residues to produce solid organic fertilizers at home and abroad is very different, and it is difficult to meet the requirements of the "People's Republic of China Agricultural Industry Standard "Organic Fertilizer Standard" (NY525-2012) standard", resulting in no sales or little market demand , the main reasons are: its process technology is not highly targeted, imperfect, mismatched, low level of automation control, and unstable product quality

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