a) Determine the total GMF surface area required to filter a volumetric flow rate of 10.0 MGD at a filtration rate of 4.0 gpm/ft2 . Divide the total surface area into an appropriate number of filter cells and determine the planar dimensions if square cells are used. Determine the percentage of the filtered water that will be used for backwashing under the following conditions, Each filter cell is backwashed once every 24 hours • Backwashing rate of 20.0 gpm/ft2 • Each cell is backwashed for a duration of 10 minutes Also determine the filtration rate through the remaining filter cells when one cell is removed from service for backwashing.
a) Determine the total GMF surface area required to filter a volumetric flow rate of 10.0 MGD at a filtration rate of 4.0 gpm/ft2 . Divide the total surface area into an appropriate number of filter cells and determine the planar dimensions if square cells are used. Determine the percentage of the filtered water that will be used for backwashing under the following conditions, Each filter cell is backwashed once every 24 hours • Backwashing rate of 20.0 gpm/ft2 • Each cell is backwashed for a duration of 10 minutes Also determine the filtration rate through the remaining filter cells when one cell is removed from service for backwashing.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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a) Determine the total GMF surface area required to filter a volumetric flow rate of 10.0 MGD at a filtration rate of 4.0 gpm/ft2 .
Divide the total surface area into an appropriate number of filter cells and determine the planar dimensions if square cells are used.
Determine the percentage of the filtered water that will be used for backwashing under the following conditions,
Each filter cell is backwashed once every 24 hours • Backwashing rate of 20.0 gpm/ft2 • Each cell is backwashed for a duration of 10 minutes
Also determine the filtration rate through the remaining filter cells when one cell is removed from service for backwashing.
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