Next, through the same hose, fill the biodigester with water, until it reaches the level of the buckets, and the gas can no longer escape. This is a critical step, because if it is not carried out correctly, the bell where the biogas will be stored will not form. Photo of a biogas plant, filled with exhaust and water. Diagram of a biogas plant, full of exhaust and water. When water reachs the level of buckets, both ends are opened.
Water level keep gases inside the bag, forming a bell.
At this point, open both ends of the plastic bag. The bell should be formed and biogas will not escape. This is approximately a mixture of 1 bucket of excrement with five buckets of water. This mixture is needed to replace the water lost during the process and keep a flowing material inside the biodigester. This is not appropiate for biogas production.