Microbes in Sewage Treatment

The video explains the process of sewage treatment, which involves removing contaminants from wastewater through primary and secondary treatments. Primary treatment mechanically removes solid waste, while secondary treatment uses biological processes to reduce organic content and BOD. The final steps include anaerobic digestion to produce biogas and chemical disinfection before releasing the treated water back into natural bodies.

Explain the significance of BOD in sewage treatment.

What is activated sludge and why is it important?

How is the effluent treated before being released into natural water bodies?