- City Qin Bodin Sewer Pipe Wastewater Treatment Qout Bodout Plant River For Sewer Pipe Diameter 24 In Manning Roughn 1 (104.99 KiB) Viewed 17 times
- City Qin Bodin Sewer Pipe Wastewater Treatment Qout Bodout Plant River For Sewer Pipe Diameter 24 In Manning Roughn 2 (65.07 KiB) Viewed 17 times
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City Qin, BODin Sewer pipe Wastewater Treatment Qout, BODout Plant River For Sewer pipe: diameter = 24 in Manning roughness coef. = 0.013 *check appendix for additional information Assuming that full flow conditions in sewer pipe correspond to peak hourly flow, if full flow velocity is equal to 5.07 ft/s find a) The slope of energy gradient. (5pts) b) The velocity for average daily flow conditions(5pts) c) Explain if and why self-cleansing velocity criteria is satisfied(5pts) If at the end of the sewer pipe, wastewater enters into a lift station's wet well before it is pumped into an equalization tank (part of the WW treatment plant) at a higher elevation. Determine the following: d) Pumping capacity in million gallons per day. (5pts) e) If the available pump can provide 1/3 of the required head at the desired pumping capacity, describe the pump setup that you would use to match the requirements. (5pts) f) Determine the water surface elevation difference between the wet well and the equalization tank, if the Total Dynamic Head (TDH) curve is the following (5pts)
70 65 60 55 50 45 40 TDH 35 30 25 20 15 10 5 0 0 Aver. Daily Flow Max flow Flow If the input BOD (BODin) in the wastewater treatment plant is 200 mg/l and the TMDL for BOD is 5724 lb/day for the river where the effluent (BODout) is discharged, calculate g) The minimum BOD removal efficiency of the wastewater treatment plant so that river water quality (in terms of BOD) will be maintained according to the standards. Base your calculation on average daily flow conditions. (10pts)