Quick and high-efficiency treatment method of pig manure

Abstract

The invention discloses a treatment method of pig manure. The treatment method comprises the following steps of 1, uniformly mixing fresh pig manure and water according to a solid-liquid ratio of 1:(1to 2), so as to obtain a manure and water mixture; putting the obtained manure and water mixture into a sealed reaction kettle, performing hydrothermal carbonizing reaction under the oxygen-free condition, stirring at the rotation speed of 80 to 120r / min, and reacting for 30 to 60min at constant temperature of 150 to 300 DEG C; after reaction is finished, stopping heating and stirring, and cooling to room temperature, so as to obtain a reaction product; finally, filtering the reaction product, or freely settling to separate solid and liquid, wherein the filter liquid is the crude liquid of liquid fertilizer, and the filter residue is charcoal. The treatment method has the advantages that the fermenting treatment on the pig manure is not required, the collected fresh pig manure is directlyused for processing and production, and the production cycle is short; the adding of other additives is not required, so that the dewatering treatment is not required before treatment, and the cost is lower; the amount-reduction and harmless effects of the pig manure can be realized, and most of fertilizer nutrients in the pig manure can be reserved.

Description

technical field [0001] The invention relates to the technical field of farm manure treatment methods, in particular to a pig manure treatment method. Background technique [0002] With the development of large-scale and intensive pig farming in China, pig farms have produced a large amount of pig manure. The traditional method of returning pig manure to the field is difficult to consume the pig manure produced by the pig farm, resulting in a large amount of pig manure piled up far away from the pig farm and farmland, emitting an unpleasant smell, pathogenic bacteria, bacteria, and insect eggs are washed away with water, causing pollution Water sources, atmosphere, and soil environment threaten people's health. In order to improve the yield and quality of pork, farmers add a large amount of trace elements (such as copper, zinc, arsenic, iron, etc.) Medium and long-term application to crops can easily lead to the accumulation of heavy metals in soil, water, and food, endange...

AI Technical Summary

Problems solved by technology

According to relevant research reports, pig manure is prone to high ammonium toxicity to crops, resulting in dead seedlings and reduced yields; crops require less phosphorus, and excess phosphorus accumulates in the soil after a large amount of pig manure is applied, and is leached by rainwater. Into surface water and groundwater leading to non-point source pollution and eutrophication

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