High-ammonia-nitrogen organic waste dry biogas fermentation device and fermentation method thereof

Abstract

The invention discloses a high-ammonia-nitrogen organic waste dry biogas fermentation device and a fermentation method thereof. The dry biogas fermentation device comprises a horizontal fermentation tank body. A feeding channel, a fermentation chamber and a discharging channel are arranged in the horizontal fermentation tank body. The bottom portions of the feeding channel and the discharging channel separately communicate with the fermentation chamber; a plurality of storage and placing mechanisms for placing additives are fixedly arranged at the top of the fermentation chamber in the lengthdirection of the fermentation chamber; and the top of the fermentation chamber communicates with a biogas pipe. After the high-ammonia-nitrogen organic waste dry biogas fermentation device and the fermentation method thereof are adopted, solid and semi-solid organic wastes are directly fermented by biogas without water dilution or pretreatment and sand removal. Tolerance to high concentration ammonia nitrogen and high gas production efficiency under high ammonia nitrogen are achieved. Less heat is needed for heating, and odor emission is low.

Description

technical field [0001] The invention relates to a dry-type biogas fermentation device for high ammonia nitrogen organic waste and a fermentation method thereof, which belongs to the field of solid waste treatment and biogas engineering of environmental engineering, and is mainly used for solid and semi-solid feces and kitchen waste in large-scale livestock and poultry farms etc. processing and utilization. Background technique [0002] For the treatment and utilization of high-ammonia nitrogen organic wastes such as solid and semi-solid animal manure and kitchen waste, there are mainly the following methods in the prior art: [0003] One is to make animal feed. Livestock and poultry manure, especially chicken manure, and kitchen waste contain a lot of protein, fat and a certain amount of carbohydrates, which can become better feed resources after processing. At present, chicken manure and kitchen waste are mainly processed and then fed to pigs, cattle and sheep. The proces...

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Problems solved by technology

The main problems of this technology: first, it needs to be diluted with water, which wastes water resources; second, the content of feed dry matter (TS) is low, the amount of feed liquid is large, and it is difficult to heat up, so the treatment efficiency is low; third, the volume of the fermentation device is large, and the construction High cost; Fourth, the amount of biogas slurry and residue is large, the nutrient content is low, the transportation cost is high, and it is difficult to fully utilize

However, in dry fermentation, the fluidity of materials is poor, and there is serious heterogeneity, and the communication between fermentation substrate and microorganisms is limited. What is more challenging is that the dry fermentation process of organic wastes with high ammonia nitrogen such as chicken manure and kitchen waste will produce Severe ammonia inhibition makes dry biogas fermentation impossible

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