Continuous wet-dry two-stage dynamic anaerobic fermentation equipment

Abstract

The invention discloses a continuous wet-dry two-stage dynamic anaerobic fermentation device. The device comprises a mixing and regulating tank, a wet-type anaerobic fermentation device, a dry-type anaerobic fermentation device and a fermentation residue dehydrating and discharging device which are sequentially connected in series through a pipeline, wherein a V-shaped filtrate tank with porous filter plates as a wall face is arranged at the bottom of the dry-type anaerobic fermentation device, the upper portion of the dry-type anaerobic fermentation device is a dry-type anaerobic fermentation zone, the lower portion of the dry-type anaerobic fermentation device is a filtrate bin, methane liquid separated from the filtrate bin returns to the mixing and regulating tank through a pipe, and tank bottom residues of the V-shaped filtrate tank are discharged through the fermentation residue dehydrating and discharging device. The device improves the reactor treatment capability and the volume gas generating rate, the feeding and discharging problems of a high-solid or dry-type reactor are solved, methane liquid zero release is achieved, methane liquid backflow and sprinkling operation is not needed, the water content of fermentation residues can be reduced to 65%-75% through fermentation residue dehydration, follow-up link utilization is promoted, and engineering operating operation links are greatly simplified.

Description

technical field [0001] The invention relates to the technical field of organic waste treatment and renewable energy development, in particular to a continuous wet-dry two-stage dynamic anaerobic fermentation equipment. Background technique [0002] Anaerobic fermentation technology can be divided into wet fermentation, high concentration or dry fermentation according to the dry matter concentration of the fermentation material. The traditional wet fermentation technology refers to mixing straw with human and animal manure, industrial wastewater and other organic matter, and generating biogas under the action of anaerobic bacteria. Since straw is prone to serious problems such as floating crusting and delamination in wet fermentation, it is mostly avoided to add straw and other substrates with light specific gravity and difficult to degrade. High-concentration fermentation technology uses solid organic waste as raw material (total solid content is more than 10%) for anaerobi...

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Problems solved by technology

[0008] However, the above-mentioned publications only involve the transfer of fermentation materials from wet fermentation to dry fermentation, but do not involve the reuse of dry fermentation biogas slurry to the wet fermentation feed system, and do not involve the issue of how to feed and discharge the dry fermentation reactor. It only stays at the stage of conceptual design or laboratory research, and there are no related reports that clarify the equipment required for each link and how to realize it from the perspective of fermentation process science

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