Device for comprehensive treatment and utilization of livestock and poultry manure

Abstract

The invention discloses a device for comprehensive treatment and utilization of livestock and poultry manure, wherein the device includes: (a) an energy recovery system: livestock and poultry feces are mixed, blended with water and then subjected to anaerobic fermentation to obtain marsh gas, energy is recovered, and at the same time, biogas residues and biogas slurry are produced; (b) a materialrecovery system: the biogas residues and the biogas slurry are subjected to oxidation modification to obtain a harmless and resource material; (c) a product refining system: the material (oxidized product) is subjected to solid-liquid separation, and a liquid part is concentrated to produce a water-soluble fertilizer containing humic acid, a foliar fertilizer containing humic acid, a compound microbial fertilizer and a macroelement or microelement water-soluble fertilizer, a solid is subjected to spray explosion and refining, and an organic fertilizer containing humic acid, a biological organic fertilizer and a compound fertilizer containing humic acid are obtained. The device provided by the invention can effectively recover energy and materials, and achieves optimal harmlessness and resource utilization; and at the same time, the discharge amount of three wastes is far lower than industrial requirement standards, and the purposes of energy saving and emission reduction are achieved.In addition to being applied in the livestock and poultry feces, the device can also be applied to similar organic waste treatment, wherein organic waste includes but not limited to domestic waste, agricultural straw, sludge and the like.

Description

technical field [0001] The invention relates to an energy-saving and environment-friendly technology and device, in particular to a device for comprehensive treatment and utilization of livestock and poultry manure. Background technique [0002] With the continuous development of society, people pay more and more attention to the protection of the environment, prompting the organic solid waste treatment industry to pay more and more attention to the research and development of resource technology and the improvement of traditional technology. The urgent problem facing waste treatment enterprises, resource treatment has become the need of modern work and life. my country is a big country in the livestock and poultry industry. Livestock and poultry manure is a by-product of the breeding industry and a major environmental pollutant. At present, the domestic annual output of livestock and poultry manure is about 3.8 billion tons. If so much livestock and poultry manure is not...

AI Technical Summary

Problems solved by technology

Therefore, the amount of biogas residue produced is often 1 / 2 to 2 / 3 of the feed amount, and most of the solid easily degradable organic matter has not been degraded

However, the anaerobic fermentation method basically cannot reduce the amount of the feed liquid. At the same time, the anaerobic sludge produced during the anaerobic fermentation process also causes sludge disposal problems like other sewage plants. The easily degradable organic matter is not fully decomposed, so it is disgusting Biogas slurry after oxygen fermentation cannot be directly used as fertilizer

The success rate of large-scale anaerobic fermentation treatment process is extremely low. According to the national statistics of relevant units of the Ministry of Environmental Protection, the success rate of this process is less than 20%. One of the main reasons is that this method produces difficult-to-handle biogas residues and biogas liquids.

However, this method has the following problems: after the biogas slurry is separated, the biogas slurry is not harmlessly disposed of and recycled; the organic solvent soaked in the biogas residue is flammable, explosive, toxic and harmful, and there are safety hazards in storage and use. Hidden dangers: biogas residue adopts the method of aerobic composting, so there are problems such as large area, low composting temperature, long composting time, and difficult to effectively remove easily degradable organic matter in biogas residue

The Chinese invention patent with the application number 201510848543.3 discloses "new biogas slurry organic fertilizer and its preparation method". The new type of biogas slurry organic fertilizer is prepared by mixing biogas slurry with three-acid mixture, compound bacterial agent, and physical light conversion materials. This method has the following problems: only the finely filtered biogas slurry is used, that is, the filtered biogas residue is not treated in a harmless and resourceful manner; the sterilizers used are ultraviolet rays and ozone, and ultraviolet rays have no continuous sterilization ability and sterilization effect Affected by the turbidity of biogas slurry and the disadvantages of easy fouling of UV lamp sleeves, ozone is a toxic and harmful substance, and large-scale use has the disadvantages of high manufacturing costs and high use requirements

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