Aeration System - Blowers

a). One blower for one basin peak requirement:

Air/each tank = 2,556,610 CFD = 1775.4 CFM = 1,800 cm < 3,000 CFM

Four blowers for system peak requirement: Air = 4 � 1,800 = 7,200 CFM > 7,100 CFM

Two blowers for system average requirement: Air = 7,200/2.0 = 7,200/2 = 3,600 CFM

One more blower spared for maintenance

Total blower number = 5

Required pressure = Depth + diffuser + aerator + piping = 6.5 + 0.3 + 0.1 + 0.24 = 7.14 Psi

Consider cold winter:

b). Select rotary positive displace blower � Type 8PDR (Denver Compressor)

8 PDR: 8 Psi, 1,800 CFM