Large scale stalk anaerobic fermentation technique and apparatus

Abstract

The invention relates to a large-scale anaerobic fermentation technique of straws and a device thereof. The fermentation technique includes biological pretreatment, anaerobic fermentation and anaerobic bacteria separation of the straws for separating an anaerobic bacteria liquid used for another circulation. The anaerobic fermentation device for implementing the method is composed of a feed device, an anaerobic generator and an anaerobic bacteria separator. The technique and the device do not need nitrogen source during the fermentation process of the straws and realize continuous feed and discharge during the anaerobic process of the straws; the molecular structure of the straws is changed through the mode of biochemistry; a large amount of straw lignin hard to be anaerobically digested is converted into a carbon source which is easily biodegraded; and a waxiness component for protecting the straws is decomposed, thus being capable of leading the anaerobic bacteria to successfully enter the inside of the straws, improving the speed of the degraded straws and being capable of realizing the production with low cost and large scale.

Description

Technical field [0001] The invention relates to a process and device for large-scale anaerobic fermentation of straw, in particular to a process and device for high-load anaerobic fermentation of straw in a flowing state. Background technique [0002] There is very little research on anaerobic digestion reactors for the characteristics of straw materials at home and abroad. In the current research, it is unanimously believed that the straw has a small density, large volume, and no fluidity. Therefore, a general "continuous flow" reactor cannot be used. However, the current "batch-type" reactors need to be completely shut down to load and unload materials, have a long operating cycle, and cannot produce continuous and stable gas generation. Therefore, in order to achieve large-scale anaerobic straw stalk, it is necessary to solve the problem of straw fluidization and the problem of maintaining a large number of anaerobic bacteria in the fluidized state. Therefore, we developed a s...

AI Technical Summary

Problems solved by technology

In the current research, it is agreed that straw has low density, large volume, and no fluidity. Therefore, it is impossible to use a general "continuous flow" reactor.

However, the current "batch" reactor needs to be completely shut down to load and unload materials, the operation period is long, and it cannot produce gas continuously and stably

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