Prepare enough raw materials for fermentation of 8 cubic meters of biogas digester. The loading rate is 85%. The concentration of feed solution is calculated as 6%. It requires 2 to 24 cubic meters of fresh pig manure or fresh cow dung. First, prepare raw materials, use their own pigs, cattle, sheep manure; the second is to pull the pig farm or cattle livestock manure, before pulling must be aware of whether recently disinfected (just disinfected feces can not be used).
Stack the plastic sheeting on the stack of raw materials, mix the raw materials and inoculum and layered and sprinkle water, add water to wet the livestock feces, and do not flow water at the bottom (to prevent carbonization of fermentation raw materials due to high temperature during stacking) . At present, the general stacking time is 5 to 6 days.
Adding sufficient inoculants The amount of methanogens in the fermentation raw material varies greatly due to the different sources and types of fermentation raw materials. Therefore, add enough inoculum. The amount of inoculum added to the new pool charge is 10% to 20% of the total amount of the feed liquid. Can add 400 to 800 kg of biogas slurry, or 2 to 4 kg of biogas fermentation bacteria.
Add enough water to add 8 cubic meters of digester to 3 to 3.6 square meters of water. The water added to the digester is preferably warm water that is sun-heated. It is not convenient to draw well water directly to join the digester (because of the lower temperature of the well, Biogas digesters start slowly. If well water is to be used, the well water should be pumped out and then warmed into the pool after being heated by the sun.
Adjust the pH of the feed solution to adjust the pH of the feed solution to neutrality. For example, the feed solution may be acidic to add appropriate amount of lime water. If the feed solution is alkaline, an appropriate amount of human waste or animal urine can be added.