Method of obtaining characteristic parameters of aerobic composting microstructure

Abstract

The invention discloses a method of obtaining characteristic parameters of an aerobic composting microstructure. The method provided by the invention comprises the following steps: (1) respectively blending and sampling a composting body in an aerobic composting process at more than two time points; (2) vacuum freeze drying the obtained sample to obtain a granular sample to be measured with particle diameter smaller than 2mm; (3) detecting the median particle diameter D50 of the granular sample to be measured, and drawing a change trend chart; (4) detecting the shape factors of the granular sample to be measured, and drawing a change trend chart; (5) obtaining the average porosity of a composting micro-unit, and drawing a change trend chart; and (6) determining the thickness of an aerobic layer, and drawing a change trend chart. The method provided by the invention can be used for effectively solving the realistic problem of creation and characterization difficulty of the microstructure in the existing aerobic composting numerical simulation and mechanism research processes, and facilitating the energy saving and emission reduction in the composting process, improving the reaction mechanism research and enhancing scientific and practical engineering technology and equipment research and development.

Description

technical field [0001] The invention relates to a method for obtaining microstructure characterization parameters of aerobic compost. Background technique [0002] According to statistics, my country currently produces more than 4 billion tons of organic solid waste annually. If it is not handled properly, it will easily cause environmental pollution and bring safety hazards. As an effective way to recycle organic solid waste, high-temperature aerobic composting technology is widely used because of its simplicity, ease of implementation, and high efficiency. In my country, there are more than a thousand enterprises that intensively use organic solid waste materials such as livestock and poultry manure to produce organic fertilizers on a factory scale. [0003] However, due to the complexity of the fermentation environment of compost materials, there are still many problems such as uneven fermentation and the generation of malodorous gases. Mathematical simulation and mechan...

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Problems solved by technology

[0003] However, due to the complexity of the fermentation environment of compost materials, there are still many problems such as uneven fermentation and the generation of malodorous gases. Mathematical simulation and mechanism research based on microstructure construction and characterization are important ways to solve the above problems

Scholars at home and abroad put forward the concept of microstructure of aerobic composting of organic solid waste, which reasonably interprets the biochemical evolution mechanism of compost from micro to macro, but there is still no effective method to construct and characterize the microstructure of aerobic composting, which restricts Research on energy saving, emission reduction, synergistic reaction mechanism and applicable engineering technology and equipment research and development

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