Low-emission static oxygen-control biologically-enhanced humification composting method

Abstract

The invention relates to a low-emission static oxygen-control biologically-enhanced humification composting method. The method comprises the following steps: respectively crushing organic wastes intoparticles with the particle size of less than 5 cm; uniformly mixing and stirring according to a weight ratio; adding a biologically-enhanced composite microbial agent accounting for 0.1-0.5% of the total amount of the mixture and allowing the water content of the organic waste stock to be 60-65%, the carbon-nitrogen ratio to be 23-30, and the volume weight to be 700-950 kg/m<3> to obtain a composting raw material. Air with a supply amount of 0.40-0.45 m<3>/h/m<3>, air with a supply amount of 0.28-0.38 m<3>/h/m<3> and air with a supply amount of 0.13-0.26 m<3>/h/m<3> are respectively providedthrough high-pressure aeration pipes in the three stages of compost temperature rise, high temperature and temperature reduction to fully decompose organic matters; and after fermentation is completed, the water content of a finished product fertilizer is 33-42%, the volume weight is reduced to 400-650 kg/m<3>, the volume of a pile body is reduced by 30-50%, and meanwhile, emission of methane, nitrous oxide, ammonia gas and hydrogen sulfide is reduced.

Description

technical field [0001] The invention relates to a composting method, in particular to a method for low-emission static oxygen-controlling bio-intensified humification composting. Background technique [0002] Studies have shown that the current basic resources of organic fertilizers in my country are about 5.7 billion tons per year, including about 3.8 billion tons of livestock and poultry manure (fresh), about 800 million tons of human manure (fresh), and about 1 billion tons of straw (air-dried). Green manure is about 100 million tons (fresh), and cake fertilizer is about 20 million tons (air-dried). Composting is a method of aerobic fermentation to treat livestock and poultry manure. It is mainly a process of transforming organic matter into fertilizer through the fermentation of microorganisms under certain water, C / N ratio and ventilation conditions under artificial control. In this composting process, organic matter is transformed from an unstable state into a stable h...

AI Technical Summary

Problems solved by technology

When the ventilation and oxygen supply are insufficient, a large number of anaerobic areas will appear inside the pile, increasing CH 4 The production and discharge of malodorous gases affect the composting process; while excessive ventilation and oxygen supply will promote water evaporation and heat loss, resulting in a drop in temperature and limited microbial activity, thereby affecting the quality of composting

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