Types of Bio-gas Plants- Floating gas-holder type
- Fixed dome type
- Bag type
A dig-ester tank or a well is made out of concrete and it called the dig-ester tank T, which has two parts: the inlet and the outlet. The inlet is from where slurry is transported to the tank, which has a cylindrical dome H made of stainless steel. This dome floats on the slurry and collects the gas generated. That is why such a biogas plant is known as floating gas holder type. Fermentation of the slurry takes for about 50 days. The pressure inside H increases when more gas is formed by bacterial fermentation. The gas is then transported out through outlet pipe V. The decomposed matter moves into the next chamber in tank T. By using the outlet pipe this is then removed to the overflow tank, which is used as manure for cultivation purposes.
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