Treatment method of zero pollution of waste of pig farm

Abstract

The invention discloses a treatment method of zero pollution of waste of a pig farm, which aims at carrying out treatment of decontamination, reduction and recycling to waste and residues of the pigs and producing refined organic fertilizers with convenient application and market competitiveness by the processing of fermentation, stabilization, crushing and screening and the like. The treatment method comprises the following steps: collecting urine of pigs into a methane tank for anaerobic fermentation, flowing into a soaking tank, absorbing with stalk powder, transferring into an acidification tank for acidification, carrying out stirring, conditioning, dispensing, primary fermentation, secondary fermentation, stabilization, crushing and screening to the obtained mixture with waste of the pigs in the collecting tank, and processing the fine materials into refined organic fertilizers; coarse materials is returned to the soaking tank, mixed with the stalk powder to absorb the fine materials, processing the fine materials and producing refined organic fertilizers; the placenta for foaling of sows in the farm and pig carcasses with unexplained death are put into a methane incinerator for incineration on the day; the smoke enters a ventilating bin at the bottom part of a stabilizing bin and is exhausted after being filtered by organic fertilizers; and the residues are delivered into a fermentation tower and is processed into the refined organic fertilizers.

Description

Technical field: [0001] The invention relates to the field of organic waste composting, and more specifically relates to a zero-pollution treatment method for pig farm waste. Background technique: [0002] At present, the methods of manure treatment in pig farms are as follows: 1. It is directly discharged or applied to farmland, ponds, and urine is discharged into rivers. This method of direct discharge without any treatment is low in cost, but Big pollution; 2. Pig manure is anaerobically fermented to produce biogas, which is used for cooking, boiling water, cooking, heating, lighting, biogas residues are applied to farmland or ponds nearby, and biogas slurry and pig urine are discharged into rivers. In this treatment method, although the pig manure has been technically treated, the biogas slurry and pig urine are directly discharged, causing pollution, and the biogas residue has not been made into commercial fertilizer. It can only be applied to the nearby farmland or pon...

AI Technical Summary

Problems solved by technology

[0002] At present, the methods of manure treatment in pig farms are as follows: 1. It is directly discharged or applied to farmland, ponds, and urine is discharged into rivers. This method of direct discharge without any treatment is low in cost, but Big pollution; 2. Pig manure is anaerobically fermented to produce biogas, which is used for cooking, boiling water, cooking, heating, lighting, biogas residues are applied to farmland or ponds nearby, and biogas slurry and pig urine are discharged into rivers. In this treatment method, although the pig manure has been technically treated, the biogas slurry and pig urine are directly discharged, causing pollution, and the biogas residue has not been made into commercial fertilizer. It can only be applied to the nearby farmland or ponds, and the amount of use is limited. When the production of biogas is greater than the amount used, it is discharged into the atmosphere, resulting in secondary pollution. In addition, when the amount of pig manure is large, the investment is also large; 3. Biogas is produced by anaerobic fermentation of pig manure, and the biogas is used for power generation , biogas slurry and pig urine are discharged up to the standard after sewage treatment. With this treatment method, although the pig manure can basically meet the discharge requirements after technical treatment, and the biogas has also undergone energy conversion, the biogas residue can only be used on nearby farmland or ponds. The amount is limited, and the investment is also large, the treatment cost is high, and the treatment is not thorough; 4. It is the pig raising technology in the Luodong biological fermentation house. The pig manure has been harmlessly treated, and the manure after the harmless treatment has accumulated In the pig house, clear it out and apply it to the nearby farmland after three years. Although the pig manure has been harmlessly treated by this treatment method, it cannot be used as a commodity. If it is used in the nearby farmland or pond, the amount of use is limited and it will last a long time. The accumulation will form secondary pollution