Situation: The town of Waterville has the following past population data projected beyond 1990. Year ...

Situation: The town of Waterville has the following past population data projected beyond 1990.

Year 1900 1910 1920 1930 1940 1950 1960 1970 1980 1990

Population 10,240 12,150 18,430 26210 22,480 32.410 45,050 57,200 64,030 77,320

The average water consumption (including every possible sector) is 160 gal/cap-day in 2005. The town has a wastewater treatment plant (WWTP) with a treatment capacity of 20 MGD. Due to the rapid growth of the population, the town is planning to build a new WWTP assuming that the old WWTP will not be used any more after the new WWTP is operating.

Requirements: You are hired by the town as an engineer to do the planning. You need to (1) estimate the future populations using any reasonable method; (2) estimate the future wastewater generation rate (e.g., in the units of gal/cap-day); (3) estimate the initial year and design year of the new WWTP; (4) the average, maximum, and minimum daily and hourly flow rates for the initial and design year under both dry and wet weather conditions; (5) assume that the wastewater generated by the town is of medium strength, estimate the BOD₅, COD, SS, VSS, TKN, Total P, and alkalinity (as CaCO₃) in the raw wastewater to be treated by the new treatment plan.

Expert Solution

Ally Wells answered 8 months ago

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