Method for preparing organic fertilizer from food waste anaerobic fermentation biogas residue

Abstract

The invention discloses a method for preparing an organic fertilizer from kitchen garbage anaerobic fermentation biogas residues. The method comprises the following steps: I, mixing straw or wood bitswith a fermented biogas residue composting fertilizer and new kitchen garbage anaerobic fermentation biogas residues, performing uniform stirring, and performing primary aerobic fermentation; and II,performing secondary aerobic fermentation on a biogas residue mixed composting material after primary fermentation, controlling the temperature of aerobic fermentation to 30-50 DEG C, ensuring sufficient ventilation quantity, and stirring the biogas residue mixed composting material once every other 3-5 hours till aerobic fermentation is completed, wherein stirring and primary aerobic fermentation are implemented by using an aerobic composting stirring system of city kitchen garbage anaerobic fermentation biogas residues in the first step, and secondary aerobic fermentation is implemented byusing an aerobic composting ventilation system of the city kitchen garbage anaerobic fermentation biogas residues in the second step. The quality of the organic fertilizer can be improved, and industrial production can be achieved.

Description

technical field [0001] The invention relates to the technical field of organic fertilizer production, in particular to an industrial method for producing aerobic compost by utilizing urban kitchen waste anaerobic fermentation biogas residue. Background technique [0002] The use of anaerobic fermentation technology can transform kitchen waste and other wastes into energy substances, achieve the purpose of reducing pollution and protecting the environment, and at the same time have environmental, social and economic benefits. However, anaerobic fermentation technology will produce a large amount of biogas residue. If it is not obtained Without proper treatment, it may cause high concentrations of organic matter, pathogenic microorganisms and other pollutants to enter the environment, resulting in waste of resources and secondary pollution. Therefore, it is of great application value to explore the resource utilization of biogas residues. It is a means to effectively realize t...

AI Technical Summary

Problems solved by technology

[0002] The use of anaerobic fermentation technology can transform kitchen waste and other wastes into energy substances, achieve the purpose of reducing pollution and protecting the environment, and at the same time have environmental, social and economic benefits. However, anaerobic fermentation technology will produce a large amount of biogas residue. If it is not obtained Without proper treatment, it may cause high concentrations of organic matter, pathogenic microorganisms and other pollutants to enter the environment, resulting in waste of resources and secondary pollution. Therefore, it is of great application value to explore the resource utilization of biogas residues. It is a means to effectively realize the recycling, harmlessness and reduction of biogas residues. It can stabilize organic matter and kill pathogenic microorganisms in the high-temperature fermentation stage. Composting, the final product of composting, can also increase soil fertility and enrich soil microorganisms. Different from other solid waste composts, biogas residues have high organic matter content, low C / N, and high moisture content. Biogas residues composting is a resource utilization of anaerobic residues, which can further realize resource utilization. Recycling, reducing the harm to the environment, in order to obtain good biogas residue composting products, it is necessary to properly control the temperature, moisture content, ventilation rate, pH value and C / N and other factors during the composting process, among which the ventilation rate and composting During the process, microbial activity, organic matter decomposition rate and temperature change are related, and are one of the important parameters affecting the composting process and the quality of compost products. If the ventilation rate is too low, an anaerobic environment will appear in the composting system and affect the composting process. If the ventilation rate is too high High temperature will lead to excessive heat loss, which will affect the maintenance time of the high temperature stage in the composting process. Therefore, choosing a suitable ventilation rate is the prerequisite for efficient aerobic composting. It is necessary to control the ventilation rate during the composting process.

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