Design a coarse screen and calculate the head loss through therack, using the following information:
Peak design wet weather flow 1.98 /s
Velocity approaching rack at peak wet weather flow 0.80 m/s
? = 50°, with a mechanical cleaning device.
The bars are 12mm thick and opening are 35 mm wide.
Upstream depth of wastewater 1.52 m(Not depth of screen)
Use rectangular bars with semicircular upstream face
Calculate:
a) Screen dimensions: height andwidth.
b) The number of bars.
c) Velocity through screenbars.
d) Width of the channel.
e) Head losses through thescreen.
