Full-automatic device of producing and purifying biogas and application thereof

Abstract

The invention discloses a full-automatic device for producing and purifying biogas and its application. The full-automatic device for producing and purifying biogas comprises a night soil filter, an aerobic digestion barrel, a biogas tank, and a microecology reactor. The working process of the device in the invention comprises the steps of: using night soil and straws as main raw materials to generate biogas slurry and biogas, then using the biogas slurry and biogas to culture a lot of biological composting and beneficial microbes which are necessary for biogas fermentation, simultaneously reducing the content of BOD in the biogas slurry and the contents of carbon dioxide and other harmful gases in the biogas to purify the biogas, and treating the generated microbes as the raw material for biogas fermentation and carrying out biological composting. The device provided by the invention has advantages of simple structure, low cost and simple manufacture, and is suitable for circular agriculture and low-carbon economy usage.

Description

technical field [0001] The invention relates to a high-efficiency organic waste treatment method based on a micro-ecological cycle device. It particularly relates to a fully automatic biogas production and purification device and its application in biogas purification and biological composting. The device in the invention can complete the purification of biogas, and at the same time produce a large number of beneficial microorganisms to speed up the biogas fermentation process and organic composting process. The method is suitable for organic waste, organic waste water treatment and organic fertilizer production process. Background technique [0002] my country is the largest agricultural producer in the world. It produces 600-700 million tons of various crop straws every year, and its utilization rate is about 30%, of which only 2.6% are used after technical treatment. Because it cannot be used, it occupies a large amount of land. For this reason, straw is burned in rural ...

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Problems solved by technology

However, since the cellulase mentioned in the above method needs to be purchased from outside, and the cost is relatively high, although this method has a better effect, it is not suitable for large-scale popularization.

[0005] 2. The production of biogas is unstable

Therefore, although the simple method of recycling biogas residues to increase the number of biogas fermentation microorganisms can increase biogas production to a certain extent, it still has limitations and has little effect on shortening the initial biogas production time.

[0007] 3. There is secondary pollution in biogas slurry

The limitation of this method is that there are still a certain number of harmful bacteria in the biogas slurry, which will affect the quality of the produced medium

At the same time, this method cannot handle a large amount of biogas slurry, so it is not suitable for projects aiming at environmental protection and waste treatment

[0009] 4. Biogas production and biocomposting cannot be carried out at the same time

But the reaction speed is slow and the pollutant treatment capacity is low

At present, there is no report that the combination of the two will be used to establish a natural method of organically integrating biocomposting and biogas fermentation.

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