Process for cyclically treating livestock-poultry excrement, livestock and poultry died of illness, and slaughterhouse leftover by subcritical water

Abstract

The invention discloses a process for cyclically treating livestock-poultry excrement, livestock and poultry died of illness, and slaughterhouse leftover by subcritical water; the process comprises the steps of 1) mixing straws with the treated livestock-poultry excrement and/or livestock and poultry died of illness and/or slaughterhouse leftover to obtain a mixture; 2) conveying the mixture into a reactor; 3) introducing high-pressure steam into the reactor, and stirring the mixture that accounts for about 80% of the volume of the reactor; 4) turning off a gas-liquid separator 20-25 minutes after the high-pressure steam is introduced, holding the pressure, and decreasing the pressure when the pressure drops to 0.02 MPa and below; 5) opening a discharge valve to obtain organic fertilizer subjected to pressure-holding treatment, and conveying the organic fertilizer to a stocking yard; 6) stirring the organic fertilizer to lower the temperature, windrowing, measuring the inner temperature of each windrow in intervals of several hours, stirring again until the inner temperature of each windrow drops to 60 DEG C and below, and naturally cooling to finally form the finished organic fertilizer. The process of the invention has the advantages of high treating capacity, good simplicity, high fertilizer efficiency and the like.

Description

technical field [0001] The invention relates to the technical field of using dead livestock and poultry and slaughterhouse leftovers to prepare organic fertilizers, in particular to a subcritical water resource circulation process for treating livestock manure, sick dead livestock and poultry and slaughterhouse leftovers. Background technique [0002] With the rapid development of my country's animal husbandry, it has become a major trend in the development of my country's livestock and poultry industry to slaughter livestock and poultry through slaughterhouses for consumption by residents. However, during the development of animal husbandry, sick and dead livestock and poultry will inevitably be produced, and in the process of slaughtering livestock and poultry in slaughterhouses, more leftovers will be produced. major problems in the development process. [0003] Livestock and poultry manure, sick and dead livestock and poultry, and leftovers from slaughterhouses are an a...

AI Technical Summary

Problems solved by technology

[0004] At this stage, the main methods used to deal with livestock and poultry manure, dead livestock and poultry, and slaughterhouse leftovers are: deep burial, incineration, composting, corpse pit treatment, chemical production, and biodegradation. Harmful consequences such as environmental pollution to varying degrees may occur if livestock and poultry manure, sick and dead livestock and poultry and leftovers from slaughterhouses are disposed of in different ways:

[0005] 1. Pollution of soil or groundwater due to deep burial

[0006] 2. A large number of pollutants such as smoke and other pollutio...