Question

what is sludge explain how it is treated

Answer 1

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

IF IT IS A HELPFUL ANSWER PLEASE MARK ME AS BRAINLIEST

Answer 2

Explanation:

Sewage sludge is the residual, semi-solid material that is produced as a by-product during sewage treatment of industrial or municipal wastewater. The term "septage" also refers to sludge from simple wastewater treatment but is connected to simple on-site sanitation systems, such as septic tanks.