Question

What is the primary role of the spent slurry outlet located at the side of a biogas plant digester?

Options

• Introducing atmospheric air to enhance aerobic digestion

• Supplying combustible biogas directly to lighting systems

• Mixing fresh cattle dung with water before entering the digester

• Removing nutrient-rich fertiliser in the form of digested organic matter

Answer 1

The spent slurry outlet removes the digested organic matter from the side of the digester, which is utilized as a nutrient-rich fertiliser.