An engineer is assigned to design a filter complex that treats 30 mgd of water. You may want set up a spreadsheet for the calculation so you can easily change values where needed. also be helpful for your design project. (14 pts) a. What is the total number of filters that should be used? b. If a loading rate of 4 gpm/sf is selected, what is the filter surface area of each filter (in the unit of ft²)? c. If the filter width is 15-ft, what is the length of each filter? Please make length integer in the unit of ft.

Structural Analysis
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Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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Can you please help me solve this homework question it is not a quiz question or exam question it’s a homework question I need full explanation with work provided. I need understanding.
An engineer is assigned to design a filter complex that treats 30 mgd of water. You may want
set up a spreadsheet for the calculation so you can easily change values where needed. It
also be helpful for your design project (14 pts)
a. What is the total number of filters that should be used?
b. If a loading rate of 4 gpm/sf is selected, what is the filter surface area of each filter (in the
unit of ft²)?
c. If the filter width is 15-ft, what is the length of each filter? Please make length integer in the
unit of ft.
d. Suppose at a given time, one filter is out of service for maintenance, and one filter is in
backwash, what is the loading rate (in the unit of gpm/ft²) to the remaining filters in operation
under this circumstance? Do you think this value is acceptable or not?
e. Suppose each filter is backwashed for 15 min every other day. The backwash flowrate is 6
gpm/sf for 5 min followed by 20 gpm/sf for 10 min. What is the volume (in the unit of
gallon) of water used to backwash one filter?
f. What is the total volume of water (in the unit of million gallon) used to backwash all the
filters every other day? Assume same numbers of backwash events happen everyday, what is
the actual flow rate that can be delivered to the distribution system in the unit of mgd? (Hint:
this number should be less than 30 mgd) Assuming the total amount of water that needs to be
reserved in the plant is 120% of backwash needs.
Transcribed Image Text:An engineer is assigned to design a filter complex that treats 30 mgd of water. You may want set up a spreadsheet for the calculation so you can easily change values where needed. It also be helpful for your design project (14 pts) a. What is the total number of filters that should be used? b. If a loading rate of 4 gpm/sf is selected, what is the filter surface area of each filter (in the unit of ft²)? c. If the filter width is 15-ft, what is the length of each filter? Please make length integer in the unit of ft. d. Suppose at a given time, one filter is out of service for maintenance, and one filter is in backwash, what is the loading rate (in the unit of gpm/ft²) to the remaining filters in operation under this circumstance? Do you think this value is acceptable or not? e. Suppose each filter is backwashed for 15 min every other day. The backwash flowrate is 6 gpm/sf for 5 min followed by 20 gpm/sf for 10 min. What is the volume (in the unit of gallon) of water used to backwash one filter? f. What is the total volume of water (in the unit of million gallon) used to backwash all the filters every other day? Assume same numbers of backwash events happen everyday, what is the actual flow rate that can be delivered to the distribution system in the unit of mgd? (Hint: this number should be less than 30 mgd) Assuming the total amount of water that needs to be reserved in the plant is 120% of backwash needs.
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