Question

Explain how biogas is harnessed. State its advantages.

Answer 1

Answer:

Explanation:

Heat-only biogas energy

Biogas can simply be burned through the combustion process to produce heat only. When burned, one cubic meter of biogas produces around 2.0/2.5 kWh of thermal energy. A proportion of the heat generated in the plant can be used first hand to power the digester and the nearby buildings.

ADVANTAGES OF BIOGAS

Producing biogas gives many advantages for the environment, companies and people involved. The advantages are:

• Biogas is a green energy source in form of electricity and heat for the local grid.

• Considerable environmental advantages - less emission of the greenhouse gasses methane, CO2 and nitrous oxide.

• Environmentally friendly recirculation of organic waste from industry and households.

• Less odor inconveniences when spreading slurry on the fields - fermented slurry smells considerably less than normal slurry and the smell decreases faster.

• Plants absorb fermented slurry better, increasing the yield on the fields.

• Protection of subsoil water - improved nitrogen exploitation reduces leaching and thereby drinking water contamination.

• Reduced costs for artificial fertilizer.