Composting method capable of carrying out damp and hot preprocessing to accelerate composting of livestock excrement

Abstract

The invention discloses a composting method capable of carrying out damp and hot preprocessing to accelerate the composting of livestock excrement. The composting method comprises the following specific steps: firstly, mixing the livestock excrement with conditioner to regulate a moisture content, a carbon nitrogen ratio and a pH (Potential of Hydrogen) value; then, heating, and maintaining damp and hot preprocessing for 1-4h after the temperature of materials is raised to 80-95 DEG C; after the materials are cooled to 50 DEG C, inoculating organic material decomposition agent to carry out secondary aerobic composting, and ensuring that the materials are completely composted until a fermentation temperature is lowered to environment temperature and does not change. Compared with conventional composting which does not carry out the damp and hot preprocessing, the composting method disclosed by the invention is characterized in that the damp and hot preprocessing is combined with organic material decomposition agent inoculation, so that composting temperature can be obviously improved, a composting period is shortened, meanwhile, nitrogen losses in a composting process can be reduced, a composting humification course is accelerated, the content of humus is improved, and the quality of the composting product is guaranteed.

Description

technical field [0001] The invention relates to a composting method for promoting the maturity of livestock and poultry manure through moist heat pretreatment, and belongs to the technical field of harmless solid waste, resource treatment and disposal. Background technique [0002] At present, domestic and foreign livestock and poultry manure treatment technologies mainly include: landfill method, incineration method, dehydration drying method, biological fermentation method (anaerobic fermentation to produce biogas and compost). Compared with other treatment methods, biological fermentation, especially the composting method, is considered to be an effective means to realize the resourceful, harmless and reduced volume of livestock and poultry manure. The odor, toxic substances and pathogenic bacteria in the final products of livestock and poultry manure are reduced by composting, which can be packaged as fertilizer and applied to the soil, so that organic matter can be recy...

AI Technical Summary

Problems solved by technology

Although the ability of thermophilic microorganisms to degrade organic matter is several times higher than that of mesophilic microorganisms, due to the insufficient total amount at the beginning of composting, there are defects of low degradation rate and slow temperature rise

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