In burning oily-waste sludge in a solid-waste/sludge incinerator, what statement is true?

Correct Answer: Option B — Heating of the sludge is required to obtain the correct viscosity, and auxiliary fuel is required if the water content of the sludge is too high to support combustion on sludge alone.

Sludge must be heated to lower its viscosity for proper atomization at the burner nozzle. If the sludge contains excessive water, it will not sustain combustion; therefore, auxiliary fuel is injected to maintain the required flame temperature and ensure complete destruction of the waste in compliance with environmental regulations.