You have been deputed by your school principal to train local villagers in the use of biogas plant. With the help of a labelled sketch explain the various parts of the biogas plant.
1. The plant consists of well-like underground tank made of bricks. This tank is called digester.
2. The roof of the digester is dome-shaped made of cement and bricks. The dome of the digester tank acts as a gas holder (or storage tank for biogas). Thus, the gas holder in this type of gas-plant is fixed.
3. There is a gas outlet at the top of dome for the supply of biogas.
4. On the one side of digester tank, there is a slopping inlet tank and on the other side there is a rectangular outlet tank, or overflow tank. Both these tanks are made of cement and bricks.
5. Mixing tank is connected with slopping inlet chamber (or tank) while outflow tank is connected with rectangular outlet chamber (or tank).
6. The inlet-chamber is for introducing fresh dung slurry into the main digester tank whereas the outlet chamber is for taking out spent dung slurry after extraction of biogas.
