Which of the following is not suitable for dewatering of raw sludge?
(a) Centrifugation
(b) Drying lagoon
(c) Drying bed
(d) Vacuum filter
The question was posed to me in an internship interview.
My question is from Sludge Thickening, Sludge Dewatering topic in division Sewage Filtration and Activated Sludge Process of Environmental Engineering