Multistage instant back-mixing aerobic composting reaction device and working method thereof

Abstract

The invention relates to a multistage instant back-mixing aerobic composting reaction device and a working method thereof, belonging to the field of solid waste treatment. The multistage instant back-mixing aerobic composting reaction device comprises a cylindrical body, wherein an inclination angle of 3-5 degrees is kept between the cylindrical body and a horizontal plane, and the cylindrical body is divided into a feeding area, a rotating barrel and a discharging area; an interception shaft is arranged at the middle axis of the rotating barrel, the two ends of the interception shaft are fixed to the feeding area and the discharging area respectively and do not rotate along with the rotating barrel, and a plurality of sets of interception pieces are evenly fixed to the interception shaft located in the area of the rotating barrel; and the discharging area is provided with an aeration device, the interception shaft is provided with an aeration hose, and the parts, located at the interception pieces, of the aeration hose are provided with a plurality of ventilation interfaces. The device disclosed by the invention not only retains the advantages of a short composting period, reduced ammonia gas generation, high treatment efficiency and high compost product quality of a back-mixing composting device, but also overcomes the defect that the back-mixing composting device generates a large amount of nitrous oxide, and avoids secondary pollution caused by generation of nitrous oxide in back-mixing compost.

Description

technical field [0001] The invention relates to a multi-stage instant back-mixing aerobic composting reaction device and a working method thereof, belonging to the technical field of solid waste treatment. Background technique [0002] In recent years, due to population growth and accelerated urbanization, the output of organic solid waste such as kitchen waste and livestock and poultry manure has also increased, which has brought serious pressure to the living environment. At present, my country mainly disposes of these solid wastes through incineration, landfill and aerobic composting. During the incineration process, a large amount of flue gas will be produced, which will cause secondary pollution to the environment; landfill disposal will occupy a large amount of land, generate greenhouse gases, and the maintenance cost and cost are high; and the aerobic composting method can not only effectively treat organic matter High content of solid waste, and its compost products...

AI Technical Summary

Problems solved by technology

During the incineration process, a large amount of flue gas will be produced, which will cause secondary pollution to the environment; landfill disposal will occupy a large amount of land, generate greenhouse gases, and the maintenance cost and cost are high; and the aerobic composting method can not only effectively treat organic matter High content of solid waste, and its compost products can be used in agriculture to improve the soil environment

[0003] However, the traditional aerobic composting method has a long treatment period and low treatment efficiency; the composting reactor greatly shortens the composting time and improves the composting efficiency through methods such as stirring, temperature control, and aeration, but it is still time-consuming compared to other treatment methods. Longer, and because the nitrification reaction starts too slowly after the organic nitrogen is decomposed, the connection between the ammonia oxidation (nitration) and the organic nitrogen decomposition and the connection between the nitrite oxidation and the ammonia oxidation process cannot be guaranteed, resulting in the accumulation of ammonia nitrogen and nitrite, A large amount of ammonia and nitrous oxide are produced to affect the environment; the back-mixing composting method is further improved on the basis of composting reactors, such as image 3 As shown, the back-mixing composting method can directly inoculate part of the decomposed products into the compost raw materials, promote the diversity of microorganisms in the compost raw materials, further accelerate the composting process, reduce ammonia emissions, and improve the quality of compost products

[0004] Although back-mixing composting can reduce the production of ammonia during the composting process, the back-mixing composting method cannot solve the problem of linking the two biochemical reactions of ammonia oxidation and nitrite oxidation, and cannot avoid the accumulation of nitrite and the production of nitrous oxide.

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