Question

Write information about the functioning of biogas plant. Describe which electrical instruments are run on that plant​

Answer 1

Answer:

Usually the biogas plants are directly connected with a CHP which produces electric power by burning the bio methane. The electrical power is then fed into the public power grid.

Answer 2

Bio- gass:

Cow dung, various plant materials like the residue after harvesting the crops, vegetable waste and sewage are decomposed in the absence of oxygen to give biogas. Since, the starting material is mainly cow dung, it is popularly known as gobar gas.

Working:

The plant has a dome like structure built with bricks. A slurry of cow dung and water is made in the mixing tank from where it is fed into the digester. The digester is a sealed chamber in which there is no oxygen. Anaerobic microorganisms that do not require oxygen decompose or break down complex compounds of the cow dung slurry. It takes a few days for the decomposition process to be complete and generate gases like methane, carbon dioxide, hydrogen and hydrogen sulphide. The biogas is stored in the gas tank above the digester from which they are drawn through pipes for use.

Advantages:

• Bio gas is an excellent fuel which contains up to 75% of methane.
• It burns without smoke and leaves no residue like Ash and wood or charcoal and coal burning.
• It's heating capacity is high.
• It is a used for lighting.
• The slurry left behind is a used as excellent manure which is rich in nitrogen and phosphorus.
• The large-scale utilisation of bio waste and sewage material provides a safe and efficient method of waste disposal besides supplying energy.

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