The design value of food to microorganism ratio in the tapered aeration sludge process is ___________
(a) 0.1
(b) 0.2
(c) 0.4
(d) 0.8
The question was posed to me in unit test.
My question is from Design of Activated Sludge Plant topic in division Sewage Filtration and Activated Sludge Process of Environmental Engineering