In which sludge treatment process, the organic solids are converted into more stable form?
(a) Dewatering
(b) Thickening
(c) Digestion
(d) Conditioning
This question was posed to me by my school teacher while I was bunking the class.
My question is taken from Mechanical Aeration System, Treatment of Sludge topic in division Sewage Filtration and Activated Sludge Process of Environmental Engineering