Ruminant type straw anaerobic fermentation system and fermentation method

Abstract

The invention provides a ruminant type straw anaerobic fermentation system comprising a mixing tank and a fermenting tank, wherein a bottom discharging port of the mixing tank is communicated with a feeding port of the fermenting tank through a feed pump, a discharging port of the fermenting tank is communicated with a return port of the fermenting tank through a circulation pump, and a pipe typepulverizer is disposed on the pipeline between the circulation pump and the return port. The invention also provides a ruminant type straw anaerobic fermentation method. Straw smashing and liquid material mixing are completed through the feed pump, the circulation pump and the pipe type pulverizer, and the biogas production cost is effectively reduced.

Description

technical field

[0001] The invention relates to the field of biogas engineering, in particular to a ruminant straw anaerobic fermentation system and a fermentation method. Background technique

[0002] In biogas engineering, in order to obtain a high gas production rate, there must be sufficient contact between the bacteria and the substrate, usually in a fermenter for comprehensive and thorough mixing. If the mixing in the fermenter is not thorough, the material in the fermenter will automatically stratify after a period of time. During this process, bacterial populations tend to aggregate in the lower layers due to their higher density, while decomposed substrates tend to aggregate in the upper layers. In this case, the contact surface is limited to the boundary of the two-layer interface, and little degradation occurs. Therefore, it is necessary to promote contact between the microorganisms and the substrate by agitating the contents of the fermenter. However, excessiv...

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