Question

13. The steps of wastewater treatment plant
are given below randomly.
(1) Wastewateris passed into sedimentation
tank
(ii) Sludge is decomposed by anaerobic
bacteria
(iii) Wastewater is passed through bar
screens
(iv) Wastewater is passed to grit and sand
removal tank
(v) Solids settle at the bottom and floatable
materials are removed by skimmer.
(vi) Aeration of water takes place.
(vii) Disinfection of water by adding chlorine.
Which of the following represents correct
sequence of steps?
(A) (ii) → (iv) → (1) → (v) → (ii) → (vi) → (vii)
(B) (iv) → (iii) — (i) → (V) → (ii) → (vi) → (vii)
(C) (ii) → (iv) → (V) → (0) → (ii) → (vi) → (vii)
(D) (ii) → (iv) → (1) → (ii) → (V) → (vi) → (vii)




please give the answer​

Answer 1

Answer:

D is the correct option for this question correctly

Answer 2

Answer:

The correct answer is (B) (iv) → (iii)→ (i) → (V) → (ii) → (vi) → (vii)