Question

Design flocculation tanks to treat 32800 m3/d adhering to the following initial recommendations and satisfying the conventional design parameters.

Paddle flocculators:

Two parallel tanks (each receiving one half of the total flow)

The tank has a length of 18 m, width of 6.0 m and depth of 3.5 m

Each tank has three stages, each stage occupying a square space with a paddle wheel mounted on horizontal shaft

Each paddle wheel has 4 arms with 2 blades per arm

The three stages shall provide for tapered flocculation.

Answer 1