A kind of fast composting method and application of biogas residue

Abstract

The invention discloses a biogas residue rapid composting method, and belongs to the field of solid organic waste resource utilization. The method comprises the following steps: firstly, synthesizingnano iron-based hydroxidase by using a wet sedimentation method; aging the synthesized nano iron-based hydroxidase under a high-temperature condition to obtain nano-iron-based oxide enzyme; adding thenano-enzyme into biogas residue, adjusting the water content at the same time, and performing high-temperature aerobic fermentation to obtain decomposed biogas residue, and the decomposed biogas residue can be used for producing agricultural organic fertilizers. The method is simple in process and low in device requirement, the fermented decomposed biogas residues serve as the organic fertilizerto increase the vegetable yield and have a very good growth promoting effect, meanwhile, the bio-availability of heavy metals in the biogas residues can be reduced due to the huge specific surface area of the nano-enzyme, and the effect of safely utilizing the biogas residues is achieved. Finally, the method has important significance in biogas residue resource utilization, ecological environmentprotection, human body health and agricultural product additional value improvement.

Description

Technical field[0001]The invention belongs to the field of resource utilization of solid organic waste, and specifically relates to a method and application for rapid composting of biogas residue.Background technique[0002]Anaerobic digestion is the main way of resource utilization of livestock manure. According to statistics, across the country, the anaerobic digestion process produces biogas energy and produces more than 100 million tons of fermentation residual organic matter-biogas residue; these biogas residues usually contain a considerable amount of antibiotics and pathogenic bacteria, which limits it to a certain extent. Resource utilization of biogas residue. Under normal circumstances, the biogas residue needs to be composted at high temperature to remove antibiotics and pathogenic bacteria in it to achieve the purpose of harmlessness, and then it can be further used as a resource. However, the feature of less usable organic matter in the biogas residue after anaerobic dige...

AI Technical Summary

Problems solved by technology

However, the measures of adding additional auxiliary materials are not only not conducive to the sustainable utilization of biogas residues, but also increase the cost of biogas residues treatment

[0003] The difficulty in heating up during the biogas residue composting process is mainly due to the fact that the organic matter in the biogas residue is mainly lignin, cellulose and other refractory substances, and it is difficult for microorganisms to efficiently produce a large amount of lignin and cellulose degrading enzymes, so the biogas residue is difficult to be quickly utilized by microorganisms. Difficulty heating up during composting

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