Question

What is sludge? Explain how it is treated.​

Answer 1

Answer:

Semi-solids such as faeces that settle down during wastewater treatment are called sludge.

This sludge is removed using a scraper and then transferred to a tank where it is decomposed by anaerobic bacteria to produce biogas. This biogas is used as a low-cost fuel for heating, cooking, etc.

Answer 2

Sludge is a semi-solid slurry that can be produced from a range of industrial processes, from water treatment, wastewater treatment or on-site sanitation systems.