Efficient anaerobic fermentation device and method for livestock and poultry manure

Abstract

The invention relates to the technical field of fermentation treatment of agricultural waste, and discloses an efficient anaerobic fermentation device and method for livestock and poultry manure. Thedevice comprises a pretreatment system, an anaerobic fermentation system and a collection system, wherein the pretreatment system comprises a grit chamber, an acidification hydrolysis tank and an adjustment metering tank; and a stirring rod of an anaerobic fermentation tank is provided with a semipermeable membrane which wraps anaerobic fermentation bacteria therein. According to the invention, the acidification hydrolysis tank with a controllable pH value and the adjustment metering tank are arranged, so excrement is efficiently pretreated before entering the fermentation tank; the stirring rod in the anaerobic fermentation tank is connected with the semipermeable membrane which is easy to replace and is internally provided with the anaerobic fermentation bacteria; and meanwhile, the controllability and the automation characteristic of the device are improved due to the arrangement of a PLC, so the anaerobic fermentation efficiency of the excrement is effectively improved, and the controllability of instrument operation is high.

Description

Technical field [0001] The invention relates to the technical field of agricultural waste fermentation treatment, in particular to an efficient anaerobic fermentation device and a fermentation method for livestock and poultry manure. Background technique [0002] In recent years, the development of animal husbandry in my country has faced serious pollution of livestock and poultry manure, destroying the balance of the ecosystem and polluting the environment. Therefore, the use of livestock and poultry manure fermentation to produce biogas has become a research hotspot, and anaerobic fermentation technology has been widely used. s concern. [0003] The Chinese invention patent with the patent number CN201810548314.3 discloses a livestock and poultry manure fermentation device and a fermentation method. The device includes a fermentation tank, a stirring shaft and a drive motor, which can effectively remove heavy metal elements in livestock and poultry manure. It can be removed, and ...

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Problems solved by technology

[0003] The Chinese invention patent with the patent number CN201810548314.3 discloses a livestock and poultry manure fermentation device and fermentation method. The fermenter can be removed, and the fermenter can be heated to different degrees to improve the fermentation efficiency, but the device directly acidifies the fermenter, which will affect the service life of the fermenter, and the combination of pretreatment and fermentation process will lead to low fermentation efficiency

[0004] The Chinese Utility Model Patent No. CN201721354354.1 discloses a livestock and poultry manure fermentation device. The device includes a box, a strain solution configuration box and a fan plate. The device is equipped with a manually stirred strain solution configuration The strainer solution can be mixed evenly, and the feed hopper with a crushing roller can avoid the accumulation of large pieces of manure and shorten the fermentation time. However, the strainer solution configuration box in the device needs to be manually stirred, and it is Fixed device, when the bacteria are consumed, the bacteria need to be added manually, which increases the labor cost and cannot effectively improve the biogas production rate

[0005] At present, most biogas projects in my country ignore the pretreatment process and focus on the anaerobic fermentation process. Because of the complex composition of livestock and poultry manure, the yield of biogas produced by fermentation is not high, and the pretreatment process is not good. Sufficiently cause the mixing device to be easily damaged, the life is short, and the investment cost is increased. Therefore, it is urgent to develop a high-efficiency anaerobic fermentation device for livestock and poultry manure

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