Device and method for two-phase anaerobic fermentation methanogenesis from yellow corn silage straw

Abstract

The invention relates to the technical field of fermentation methanogenesis and in particular to a device for two-phase anaerobic fermentation methanogenesis from yellow corn silage straw. The devicecomprises an acid generation tank, a pre-mixing cabin and a methanogenesis tank, wherein the lower end of the acid generation tank is connected with the upper end of the pre-mixing cabin; the lower end of the pre-mixing cabin is connected with the upper end of the methanogenesis tank; water bath jackets are arranged on the outer layers of both the acid generation tank and the methanogenesis tank;the pre-mixing cabin is a spherical cabin; and an alkali liquid addition valve, an acid liquid addition valve, a water addition valve, an inoculum addition hole, a pH value meter and a discharge holeare arranged on the pre-mixing cabin. By adopting the device, dynamic research on acetic acid generation process and methanogenesis process can be carried out, temperatures of the acid generation tankand the methanogenesis tank can be controlled, the fermentation efficiency can be affected by microorganism colonies under dynamic temperature variations, not only is fermentation process studied with fixed parameters, but also amounts of different reagents added can be dynamically controlled, and fermentation can be affected by dynamic parameter variations.

Description

technical field [0001] The invention relates to the technical field of methane production by fermentation, in particular to a device and method for two-phase anaerobic fermentation of yellow storage straw to produce methane. Background technique [0002] Yellow storage is a straw feed fermentation method relative to silage. It uses dry straw as raw material and ferments by adding appropriate amount of water and biological bacteria. Anaerobic fermentation includes: hydrolysis and acidification stage, hydrogen production and acetic acid production stage and methane production There is no obvious boundary between the three stages. In the process of using yellow storage straw as the fermentation raw material, on the basis of comprehensive analysis of the anaerobic fermentation mechanism, the two-stage method is carried out according to the ideas of phase separation, improvement of fermentation system, and operation process optimization. Analysis of the dynamic change law of microb...

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Problems solved by technology

[0002] Yellow storage is a straw feed fermentation method relative to silage. It uses dry straw as raw material and ferments by adding appropriate amount of water and biological bacteria. Anaerobic fermentation includes: hydrolysis and acidification stage, hydrogen production and acetic acid production stage and methane production There is no obvious boundary between the three stages. In the process of using yellow storage straw as the fermentation raw material, on the basis of comprehensive analysis of the anaerobic fermentation mechanism, the two-stage method is carried out according to the ideas of phase separation, improvement of fermentation system, and operation process optimization. Analysis of the dynamic change law of microbial community in the process of dry anaerobic digestion, study the change law of microorganisms in the hydrolytic acidification phase and the methanogenic phase, and study the c / n, pH value and temperature in the dry anaerobic digestion process based on the change law , solid content and other parameters, so as to optimize the dry anaerobic digestion technology, and provide reference for the application of straw dry large-scale biogas projects in northern my country. In the research process, there are no experiments on two anaerobic fermentation methane production devices for yellow storage straw. device, unable to dynamically control and sample and analyze the variables in the experimental process

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