Question

Study the given differences between primary sludge and activated sludge and select the incorrect ones

• A. (i) and (ii)
• B. (ii) and (iv)
• C. (i), (iii) and (iv)
• D. (ii) and (iii)

Answer 1

Answer: (B)

(ii) and (iv)

Answer 2

Activated sludge possesses floes of decomposer microbes, whereas, primary sludge does not possess floes. Unlike primary sludge, a lot of decomposition occurs during formation of activated sludge