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Method for strengthening carbon-nitrogen conversion in composting process based on magnet particles

A composting and microparticle technology, which is applied in the preparation of organic fertilizers, fertilization devices, organic fertilizers, etc., can solve the problems of poor direct inter-species electron transfer, shorten the time of decomposing, improve the composting process, and shorten the heating and fermentation time Effect

Active Publication Date: 2022-04-12
INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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Problems solved by technology

The traditional view is that magnetite particles contribute to the conversion process of anaerobic digestion, but in aerobic composting due to the presence of oxygen, direct interspecific electron transfer is not effective
Therefore, the application of magnetic particles in the field of aerobic composting has not been reported yet.

Method used

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  • Method for strengthening carbon-nitrogen conversion in composting process based on magnet particles
  • Method for strengthening carbon-nitrogen conversion in composting process based on magnet particles
  • Method for strengthening carbon-nitrogen conversion in composting process based on magnet particles

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Embodiment

[0041] 1. Experiments and methods

[0042] The materials used for composting are pig manure and wheat straw. The pig manure is selected from local large-scale farms in Yangling, and the wheat straw is purchased from farmers around Yangling. The selected magnet particles are prepared in the laboratory. The specific preparation method is: purchase magnetite from Beijing Yufeng Agriculture and Forestry Technology Co., Ltd., dry it at a constant temperature of 105°C for 6 hours in the laboratory, and use an ultrafine pulverizer to crush it to below 10 microns grade and sieved for later use. Wheat straw is manually chopped to a diameter of <1 cm, mixed with fresh pig manure, and the initial moisture content of the compost is adjusted to 65%, and the initial C / N ratio of the material is adjusted to 25 to ensure the smooth progress of composting.

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Abstract

The invention discloses a method for strengthening carbon-nitrogen conversion in a composting process based on magnet particles, and belongs to the technical field of aerobic fermentation composting, and the method comprises the step of adding magnet particles into a fermentation raw material in the initial stage of aerobic fermentation composting. The method has the advantages of short heating fermentation time, no equipment investment, no energy consumption, low cost of one-time investment of the magnet particles, and full utilization of the characteristics of small particle size, large specific surface area and strong reducibility of the magnet particles, thereby prolonging the high-temperature time of the compost, shortening the time of the compost to be decomposed, improving the composting efficiency, and increasing the emission of greenhouse gases.

Description

technical field [0001] The invention relates to the technical field of aerobic fermentation and composting, in particular to a method for strengthening carbon and nitrogen conversion in a composting process based on magnet particles. Background technique [0002] With the rapid development of the breeding industry, a large amount of pig manure is produced every year. Pig manure contains a large amount of organic matter, nutrients and trace elements, but also contains various pathogenic microorganisms. Returning pig manure directly to the field will lead to a series of environmental problems such as soil pollution and water eutrophication. Nowadays, there are landfill, anaerobic digestion and aerobic composting to deal with pig manure, among which aerobic composting is considered to be one of the effective ways to deal with waste. Aerobic composting converts complex organic matter into stable organic matter, and can kill pathogenic microorganisms and weed seeds. At the same ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05F17/10C05F17/50C05F15/00
CPCY02W30/40C05F17/10
Inventor 潘君廷刘宏斌魏丹李荣华张增强杨亚东罗涛习斌闫成邱凌
Owner INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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