Method for producing biogas and curve tunnel type biogas digester

Abstract

The invention provides a method for only fermenting and decomposing feces of livestock and poultry, and a method for simultaneously fermenting and decomposing feces of livestock and poultry and other organic waste to producing biogas continuously through an ecological type energy environmental-protection recycling system. The invention further provides a curve tunnel type biogas digester, a device capable for realizing automatic operation without energy consumption, and a device capable of achieving that the operation of the device is controlled remotely through a computer. The building of an oversized biogas digester with the monomer digester capacity of 1000 cubic meters is not limited by the span of a digester cover, and raw materials can be fermented, decomposed and sterilized at room temperature for at least 93 days and then are directly discharged into nature water. The ecological type energy environmental-protection recycling system can be used as a converter of biomass energy and can produce a large amount of biogas in modes of environmental protection, stable yield, low cost and large scale. The difficulties of environmental pollution and energy shortage can be solved, and the economic benefit can also be obtained.

Description

technical field [0001] The invention relates to a biogas production method and an anaerobic fermentation reactor using an eco-energy, environmental protection, recycling and regeneration system. technical background [0002] People have realized in practice that fermenting human and livestock manure with biogas bacteria (ie microorganisms) can kill insects and sterilize bacteria, and obtain high-quality energy and fertilizers. According to measurements, schistosomiasis eggs were killed in 7-22 days under normal temperature biogas fermentation conditions; hookworm eggs had a mortality rate of 75% after 50 days, and all died after 93 days; roundworm eggs had a mortality rate of 75% after 90 days; Salmonella typhi survived The time is only 30 days; Shigella flexneri was isolated after 30 hours and was negative, but it can survive for 17 days in general feces. [0003] There are many types of biogas fermentation devices (anaerobic reactors), all of which can produce gas under s...

AI Technical Summary

Problems solved by technology

Existing technologies such as upflow anaerobic sludge bed reactor (UASB), internal circulation anaerobic reactor (IC), upflow solid reactor (USR), anaerobic contact digester and other mainstream biogas digesters are limited by cost and Due to technical limitations, the capacity of a single biogas digester is mostly only 1000m 3 About, the hydraulic retention time is less than 20 days, and there is a short-circuit phenomenon of raw materials, and it is discharged after 93 days of insecticide, sterilization, fermentation and decomposition. The adaptability to fermentation raw materials is poor, the cost is high, and the operating cost is high.

Once the price of feed rises, the number of stocks decreases or the field is withdrawn, the built biogas ponds are "hard for a clever woman to cook without rice", and many biogas ponds are abandoned as a result.