Rural solid waste mixed aerobic composting method

Abstract

The invention relates to a rural solid waste mixed aerobic composting method, which comprises the following main steps: A) cutting straws to make the straws have the length of 5 to 10cm, spraying compound bacteria on a straw stack, simultaneously adjusting the moisture content of the straws to between 50 and 55 percent with percolate generated in a step B of the previous composting process, and naturally ventilating and fermenting for 10 to 15 days, wherein the spraying amount of the compound bacteria meets the condition that the ratio of the bacteria volume to the dry weight of the straws is 4 to 5mL / kg; B) mixing degradable organic matters sorted from domestic garbage and the pre-fermented straws in the step A, respectively adjusting the initial moisture content and C / N to between 50 and 65 percent and between 22 and 35 after the mixing, performing the first composting for 3 to 5 days, and introducing tail gas generated in the step into the stack of a step C; C) mixing the compost in the step B and livestock manures, adjusting the initial moisture content to between 50 and 60 percent after mixing, and performing the secondary composting for 3 to 5 days; and D) performing the composting on the compost of the step C for the third time for 5 to 7 days, and adjusting the moisture content of the stack with percolate generated in the step C to maintain the moisture content of the compost between 45 and 50 percent.

Description

technical field [0001] The present invention relates to the field of rural solid waste treatment and disposal, especially aerobic composting, bioaugmentation technology and multi-stage inoculation technology, which can realize harmless and resourceful treatment and disposal of rural solid waste, and provide technical support for the construction of a new socialist countryside . Background technique [0002] For a long time, solid waste in rural areas of our country has basically been allowed to flow freely, lacking an effective recycling system, and many rural areas have "garbage dumped, firewood stomped, and manure piled up", resulting in a dirty and messy rural ecological environment, and at the same time losing a lot of N , P, K, causing soil fertility decline and air pollution, resulting in a huge waste of resources. A large amount of rural garbage is piled up disorderly, which not only seriously endangers rural soil, groundwater, surface water and air, but also serious...

AI Technical Summary

Problems solved by technology

[0003] The complexity of straw, domestic waste and livestock and poultry manure in rural garbage is not uniform. The common treatment and disposal method is aerobic composting after one-time mixing. The material structure in livestock and poultry manure is relatively simple and can be rapidly grown by microorganisms. Utilization, to achieve the purpose of degradation, but the composition of cellulose and lignin in the straw is relatively complex, and it takes a long time to achieve microbial degradation, which will affect the entire composting process

At the same time, if the moisture content of the material is too high, it will affect the ventilation and oxygen supply and reduce the activity of microorganisms. Due to the high moisture content of livestock and poultry manure, ventilation and oxygen supply are difficult during the composting process, and the heating rate is slow; organic matter and other nutrients in domestic waste Low content, it is difficult for compost products to meet the standards of organic fertilizers

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