Ws = Wsp + Wss What does Wsp stand for in the above equation?

What is the amount of solids released into wastewater by human beings?

In ______ reactor the bed is filled with a packing material that expands when wastewater moves upwards.

Heat treatment involves heating of the sludge. The supernatant from the heat treatment system is rich in _______

Sludge treatment helps is reducing treatment costs.

Out of the below given methods which of these requires a grit removal prior to it?

Which of these is not a type of grit chamber

Sludge from the primary clarifier is __