You are to design a wastewater treatment plant for a small city, with the following historical flow
data. The dry season occurs is from June 1 to October 31 and the wet season is from Nov.1 to May
31. Assume that the build-out population for the community is 16,000 persons, and that the
residential wastewater flowrate will be 300 L/capita*d. The commercial flowrate in 2020 (1000
m3
/d) is 80 percent of what it will be at build-out. Due to high infiltration and inflow (I/I) rates, a
sewer repair program will be implemented. The I/I contribution will be 200 L/cap*d. Estimate:
a- the mean historical ADWF, AWWF, and the average annual flow
b- the design ADWF, AWWF, and the average annual flow that will be received at the community
treatment plant at build out.
c- The peaking factor for residential flow at built-out and the peak design flow including the
commercial and I/I.
Community population and average monthly influent flowrate data for the period from 2017 through
2020.
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