Rice straw fermentation treatment technology

Abstract

The invention belongs to the field of biological fermentation, and relates to a rice straw pretreatment and dry fermentation technology for producing methane. The technology adopts the technical scheme that phycomycetes is provided, with the preservation number being CGMCC No.16486. The technology comprises the following steps: preparing an inoculant from the phycomycetes; mixing dry rice straws,the inoculant and urea with the weight ratio being 200:2:1, and adjusting the water of the straws to be 60 to 75 percent, so as to obtain a fermentation substrate, and loading the fermentation substrate into a two-phase fermentation reactor to perform fermentation; ensuring that filtrate obtained during water adjustment is fermentation liquor; spraying the fermentation substrate at least once a day with the fermentation liquor during fermentation, ensuring that the amount of the fermentation liquor for single spraying is 1 / 3 the volume of the fermentation substrate; and performing fermentationfor 40 to 50 days to accomplish the treatment, so as obtain fermentation products according to the requirements. The novel phycomycetes bacterial strain can be applied to rice straw treatment and fermentation through a physical method, so as to realize green and environment-friendly resource efficient reuse.

Description

technical field [0001] The invention belongs to the field of biological fermentation, and in particular relates to a process for fermentation treatment of rice straw. Background technique [0002] In recent years, due to the extensive use of fossil fuels, CO 2 and other greenhouse gas emissions have caused a strong greenhouse effect and climate change. With the deepening of the country's attention to environmental protection and resource utilization, the exploration and development of renewable energy has become more and more important and urgent. Biogas is a more stable and clean renewable energy source than fossil fuels. The use of crop straw fermentation to produce biogas not only effectively treats straw, but also produces clean and easy-to-use energy - methane. At the same time, the by-product biogas residue and biogas slurry are rich in nitrogen and phosphorus and other plant nutrients. High-quality organic fertilizers, used in agricultural production, can effective...

AI Technical Summary

Problems solved by technology

Wet fermentation has the advantages of controlled fermentation conditions, high and stable gas concentration, and continuous feeding, but it also has disadvantages such as large-scale equipment, easy crusting of straw, high energy consumption for stirring, and large biogas slurry volume is difficult to handle.

Although dry fermentation has the advantages of small footprint, large processing capacity, no pollution discharge, and low water consumption, due to the high dry matter concentration of fermentation raw materials, it is easy to cause difficulties in feeding and discharging materials, uneven heat and mass transfer, and easy acidosis. question

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