About Biogas plant

The arrangement to produce the bio gas from the animals dung ,human excreta,industrial &domestic wastes is called the Bio gas plant.
The Bio gas plant is as shown in figure below.The bio gas plant consist of the underground tank T known as the digester.At the top of the the tank T a cylinder dome shaped roof is present which is used as the gas holder . The dome shaped roof of tank is also connected with the gas outlet S with a gas valve.On the left of the digester tank the inlet is present and on the right side of the digester a cylindrical outlet is present.The inlet is used to take in the slurry of the dung and the outlet is used to remove the slurry of the dung.

Bio gas plant

The outlet tank is also connected with the overflow tank.
Process
At first we mixed the dung and the water in the same proportion and then the obtained is called as the slurry.This slurry is then sent to the dome shaped tank i.e.Digester tank through the slopping tank .The digester tank is filled up to the cylindrical roof .Them it is left for about 50-60 days. In the tank the slurry is start to degrade in presence of the water but in absence of the air (the digester tank is air sealed) with the evolution of the bio gas. The bio gas  is start to collect in the dome shaped roof of the tank.As more and more the gas is collected the spent slurry is start to come from the outlet tank and to the overflow tank.Then gas is obtained in the dome and the gas is gets come out from the gas outlet.
In this process the gas is also obtained without any more cost and the compost is obtained with the full of Nitrogen and phosphorus which is very important to the agriculture.
Advantages:

• The gas is obtained without any more cost.
• The obtained compost is full of Nitrogen and Phosphorus which is very benificiel for the agriculture.
• This bio gas is free of the smoke which is benificial for the Enviroment.