Hello Everyone, Could anybody provide support to calculate the backwash flow rate of Dual Media Filter. Filter Diameter = 2.2 m Sand height- 0.65 m Anthracite - 0.4 m much appreciated

You have to have the effective size (d10 screen size) and the uniformity coefficient (d60/d10) to calculate the flow rate required for fluidization. You also need to know how much freeboard you have above the top of your filter media. Assuming you want to expand the bed 30% (the generally accepted percent expansion that reflects adequate fluidization) then you need to know you have enough freeboard in the tank to allow for this expansion percentage without discharging filter media out the backwash outlet line.

Back wash flow rate of Dual Media FIlter

Published on October 14, 2019 11:30 by Asanka Wimalarathne, Director at Asia Green Solutions in Technology

Hello Everyone,

Could anybody provide support to calculate the backwash flow rate of Dual Media Filter.

Filter Diameter = 2.2 m
Sand height- 0.65 m
Anthracite - 0.4 m

much appreciated

Taxonomy

Filtration
Filters
Filtration
Backflow
Water Filtration