Preparation method of rice straw biogas residue-based composite microbial fertilizer

Abstract

The invention discloses a preparation method of a rice straw biogas residue-based composite microbial fertilizer. The method comprises the following steps: carrying out yellow rice storage pretreatment on rice straw, removing a waxy layer on the surface of the rice straw, and destroying a lignin structure to depolymerize link bonds between lignin and carbohydrate; treating the straw raw materials subjected to yellow storage through a dry anaerobic fermentation technology, achieving the effective degradation of cellulose and hemicellulose of the rice straw biogas residues, and producing the rice straw biogas residues; and finally, taking the rice straw biogas residues as raw materials, adding bean cakes and a urea nitrogen source according to a certain proportion, adjusting C / N, then carrying out windrow type high-temperature aerobic composting, and adding beneficial bacteria such as bacillus subtilis and the like according to a certain proportion after the rice straw biogas residues are thoroughly decomposed, so as to prepare the high-added-value compound microbial fertilizer. According to the method, the rice straw biogas residues are used as main raw materials for producing the composite microbial fertilizer, the rice straw biogas residues are used for preparing the composite microbial fertilizer, and off-field disposal of rice straw in a water source reservoir area and development and utilization of high-added-value fertilizer products are achieved.

Description

technical field [0001] The invention belongs to the technical field of agricultural waste treatment and organic fertilizer production, and in particular relates to a preparation method of rice straw biogas residue-based compound microbial fertilizer. Background technique [0002] my country is rich in crop straw resources, accounting for 52.8% of the total biomass resources, with an annual output of about 700 million tons, of which rice straw accounts for about 1 / 3. Affected by factors such as high long-distance transportation costs and imperfect market mechanisms, most of the straw cannot be effectively disposed of, which not only causes waste of resources, but also pollutes the air and water environment. At present, the main treatment method of rice straw in my country is direct return to the field, but a series of secondary planting obstacles and environmental risks caused by this are gradually becoming prominent, such as easy lodging of the following crops, aggravation o...

AI Technical Summary

Problems solved by technology

However, there is a "waxy layer" on the surface of rice straw, which distributes a large number of particles and filaments, and there is a crystal structure in which lignin and hemicellulose are covalently bound to wrap cellulose and hemicellulose. Whether it is direct anaerobic fermentation or Direct aerobic composting is limited, and domestic related engineering cases are rarely reported

In the dry anaerobic fermentation process using rice straw as the main raw material in the water source reservoir area, because there are only a small number of individual livestock and poultry breeding in the area, and the availability of organic nitrogen sources such as livestock and poultry manure is poor, the operation of the anaerobic fermentation project usually needs to be maintained at In a high C / N environment, the produced rice straw biogas residue has a series of problems such as low nutrient content, low number of beneficial bacteria, and low utilization value, resulting in low economic output of the entire treatment system

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