Method for stepwise promoting biogas fermentation

Abstract

The invention belongs to the technical field of a gas fermentation device and relates to a method for stepwise promoting biogas fermentation. The method comprises the following steps of 1, collecting crop straws, cutting the crop straws to obtain small sections with length of 30-50cm, and adding water into the small sections, wherein the amount of the water is 35-45% that of the small sections, 2, bundling the straw sections mixed with water to obtain small bunches with unit weight of 8-12kg, stacking the small bunches in a biogas tank around the tank wall of the biogas tank to the height of 1.5-3m according to the shape of the biogas tank, and 3, carrying out anaerobic fermentation for 5-8 days, wherein in the anaerobic fermentation, water with a temperature of 35-40 DEG C is regularly sprayed to the straw bunches. After respective inoculation with biogas inoculums, the inoculums and a fermentation raw material are mixed, the fermentation device is heated to a temperature of 25-35 DEG C and an anaerobic fermentation process is carried out for 2-8 days. The method effectively provides a temperature in the fermentation tank, promotes a fermentation rate of the culture in the fermentation tank, prevents straw burning-caused environmental pollution and improves economic benefits.

Description

Technical field [0001] The invention belongs to the technical field of gas fermentation devices, and specifically relates to a method for stepwise promotion of biogas fermentation. Background technique [0002] With the rapid development of our country’s economy, people’s living standards have continued to rise, but the resulting various wastes have also continued to increase, such as industrial wastewater, construction waste, pig farm wastewater, crop straw, human, animal, and poultry manure, etc. Garbage waste not only brings great pressure to the environment, but also increases the cost of disposal. But on the other hand, some wastes such as kitchen waste, crop straws, human, livestock and poultry manure, pig farm waste water, etc. have high organic content, which can be treated with biological methods to achieve the same collection of resources and waste. For the purpose of Baobao, anaerobic digestion technology is a commonly used biological treatment method. [0003] The tem...

AI Technical Summary

Problems solved by technology

The existing heating method is to heat all the raw materials of wastewater or its anaerobic digestion device. This heating method needs to consume a lot of heat to raise the temperature, and the heating effect is not very ideal.