Settling Velocity
Critical Scour Velocity in Constant Velocity Horizontal Flow
Grit Chamber (VH)
Proportional Flow Weir
Where,
B = Width of the channel.
Vh = Horizontal flow velocity.
Cd = Coefficient of discharge.
x and y are coordinates on weir profile.
Parabolically or V-Shaped Grit Chamber Provided with a Parshall Flume
Vacuators
Vacuum Pressure = 0 to 25 cm of Hg
For 10 to 15 minutes.
Trickling Filter
Destruction and Removal Efficiency (DRE)
Where,
Win = The mass fill rate of one POHC (Principal organic Hazardous constituent) in the waste stream.
Wout = Mass emission rate of the same POHC present in the exhaust emission prior to release to the atmosphere.
Oxidation Ponds
For Inlet Pipe Design
Assume V = 0.9 m/s
Assume flow for 8 hrs.
For Outlet Pipe Design
Dia of outlet = 1.5 dia of the inlet pipe
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