S/N

Unit operation/Design criteria

Manual design values

C-Programming output values

1

Expected population

38430

38430.95

2

The water demand

3.85 MLD

3.843095 MLD

3

Aeration tank

Diameter of 5 m and total height of cascade 2.5 m

-

4

Plain Sedimentation tank

64.8 × 4.64 × 4.5 m³

64.800003 × 4.633360 × 4.5 m³

5

Sedimentation aided with coagulants

i) Chemical feeding (size of solution tank)

0.5 × 0.5 × 0.5 m³

0.468621 × 0.468621 × 0.5 m³

ii) Approach channel

0.175 × 0.225 m²

0.166734 × 0.216734 m²

iii) Mixing tank

1 × 1 × 1 m³

0.816826 × 0.816826 × 1 m³

iv) Flocculating tank

10 × 1.4 × 1.6 m³

10 × 1.45100 7× 1.6 m³

v) Settling tank (rectangular)

6 × 3.3 × 3 m³

6 × 3.336020 × 3 m³

6

Rapid gravity filter

6.5 × 6.5 m²

6.394058 × 6.394058 m²

7

Chlorination plant

Liquid chlorinator having capacity of 0.1 to 5 kg/m

-

8

Underground clear water reservoir

27.75 × 27.75 × 5 m³

27.7239 × 27.7239 × 5 m³

9

Horse power of centrifugal pump

41 HP

41.0889 HP