Continuing the design of preliminary treatment facilities for the town of Pigeonroost’s...

Continuing the design of preliminary treatment facilities for the town of Pigeonroost’s WWTP ( Problem 13-1 ), design an aerated grit chamber. Use Albrecht’s equation and assume a slot velocity of ≤ 0.15 m/s is required to achieve removal of the design SES. Assume the sewers are separated and use a worst case situation for the design of the grit channel. To complete the design, specify the air supply rate and provide a sketch of the cross section with dimensions.

Problem 13-1

Using the pumps given in Table 13-1, design a screw pump system for the town of Pigeonroost using the following assumptions:

Complete the design by providing the following: pump specifications (diameter, number of flights), number of pumps, and a sketch of the plan view with dimensions (assume the width of each pump equals the diameter of the screw plus 0.6 m).

Table 13-1