Straw wet anaerobic fermentation and aerobic fermentation combined treatment device and method

Abstract

The invention discloses a straw wet anaerobic fermentation and aerobic fermentation combined treatment device and method, and belongs to the technical field of biogas production through straw anaerobic fermentation. The biogas slurry transported from the outside enters a biogas slurry storage tank for temporary storage and is fed into a hydrolysis tank through a pump; straw enters the straw pulverizer through the loading tool. The crushed straws enter a hydrolysis tank through a belt conveyor; the straws and the biogas slurry tank are fully hydrolyzed and acidified, hydrolase is also added, after hydrolytic acidification, an aerobic fermentation product is separated by using an I-type solid-liquid separator; the separated solid enters a pipeline pulping machine, all the pulp enters a typeII solid-liquid separator, after solid-liquid separation, the solid part, namely cellulose and hemicellulose, enters an aerobic fermentation organic fertilizer production workshop, the liquid part enters a temporary storage tank, the liquid part enters an anaerobic fermentation tank through a pump, the produced biogas is externally applied, and the produced biogas slurry flows back. A large amountof biogas slurry can be consumed, no biogas slurry is discharged, and the hydraulic retention time of straw anaerobic fermentation is shortened to about 22 days from 48 days.

Description

technical field [0001] The invention relates to the technical field of using straw anaerobic fermentation to produce biogas, which is used to consume biogas slurry (or livestock and poultry manure) without producing biogas slurry, and at the same time avoid the difficult-to-decompose cellulose from entering the anaerobic fermentation process. Cellulose is used in aerobic composting. Specifically, it is a straw wet anaerobic fermentation + aerobic fermentation combined treatment device and method. Background technique [0002] In my country, regardless of rice straw and energy crops in the south, or corn straw and wheat straw in the north, there is a large output, which belongs to agricultural waste, which has already had a great adverse impact on the environment, and resource utilization is very difficult, requiring It is a good development direction to develop and fill the technical gap of straw resource utilization, using straw as raw material to produce biogas by anaerobi...

AI Technical Summary

Problems solved by technology

[0002] In my country, regardless of rice straw and energy crops in the south, or corn straw and wheat straw in the north, there is a large output, which belongs to agricultural waste, which has already had a great adverse impact on the environment, and resource utilization is very difficult, requiring It is a good development direction to develop and fill the technical gap of straw resource utilization, using straw as raw material and using anaerobic fermentation technology to produce biogas, but the bottleneck restricting the development of technology is that the cellulose in straw is difficult to decompose and takes a long time

At the same time, the wet anaerobic fermentation technology has a high gas production rate, but the bottleneck restricting the development of the technology is that it will produce a large amount of biogas slurry (liquid with high ammonium nitrogen content and high COD content) that cannot be processed

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