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DO Sag Curve: A wWTP discharges wastewater to a nearby river and a city 2.88 km...
A city discharges 16,000 m3/d of treated wastewater into a nearby river. The treated wastewater has...
A city discharges 16,000 m3/d of treated wastewater into a nearby river. The treated wastewater has a BOD5 of 12 mg/L and k of 0.12 d-1 at 20oC. The river has a flow rate of 0.43 m3/s and an ultimate BOD of 5.0 mg/L. The DO of the river is 6.5 mg/L and the DO of the wastewater is 0 mg/L. Compute the DO and initial ultimate BOD after mixing.
The East Hartford WWTP discharges 150 MGD of treated wastewater into the CT river. The treated was tested in the lab and found to have aBOD5 of 17.5 mg/L and an ultimate BOD (Lo) of 92 mg/L at 20oC....
The East Hartford WWTP discharges 150 MGD of treated wastewater into the CT river. The treated was tested in the lab and found to have aBOD5 of 17.5 mg/L and an ultimate BOD (Lo) of 92 mg/L at 20oC. Find the reaction rate K, for the treated wastewater. The CT river has a flow of 250 m2/s and an ultimate BOD (Lo) of 6 mg/L. the DO of the river is 4.5 mg/L and the DO of the wastewater is0.2...
O The town of Gangnam in Seoul, Korea discharges 17360 m3/day of treated wastewater in the Han River. The treated w...
O The town of Gangnam in Seoul, Korea discharges 17360 m3/day of treated wastewater in the Han River. The treated wastewater has a BOD5 of 12 mg/L and a BOD decay constant, k, of 0.12 day at 20 °C. The river has a flow rate of 0.43 m/s and an ultimate BOD, Lo, of 5 mg/L. The DO of the river is 6.5 mg/L and the D0 of the wastewater is 1.0 mg/L (a) Calculate the ultimate BOD of the...
Determine the minimum dissolved oxygen (DO) concentration in a river downstream from a wastewater treatment plant (W...
Determine the minimum dissolved oxygen (DO) concentration in a river downstream from a wastewater treatment plant (WWTP) discharging at a flow rate of 5.00 million gallons per day (MGD). The WWTP achieves secondary treatment standards (BOD5 = 30 mg/L). The wastewater temperature is 25.0 °C and contains 4.0 mg/L of DO. The characteristics of the river upstream from the point of discharge are Q=20.0 cubic feet per second (cfs), T = 20.0°C, BODu = 3.0 mg/L. and DO = 7.0...
A tannery discharges wastewater into a river under the following conditions: Parameter Wastewater River 1.148 Flow...
A tannery discharges wastewater into a river under the following conditions: Parameter Wastewater River 1.148 Flow (m/s) BOD, at 15°C (mg/L) DO (mg/L) Temperature, Speed (m/s) Depth (m) 1.00 15.0 7.222 7.66 6.00 15.0 0.300 2.92 The BOD rate constant, k, in the river/wastewater mixture is measured as 0.379 d at 20°C. Deter- mine the ultimate BOD (in kg/d) that the tannery may discharge and still keep the DO in the minimum DO in the river above 5 mg/L.
A wastewater discharge has a flow equal to upstream flow of the river it is being...
A wastewater discharge has a flow equal to upstream flow of the river it is being discharged into. The river upstream has a DO of 7 mg/L, and negligible BOD. The wastewater discharge has an ultimate BOD of 50 mg/L, and negligible DO. It is determined that it would cost an equal amount of money to reduce the BOD to 25 mg/L or to increase the DO to 8 mg/L. Which alternative, considering DO sag, would you judge to be...
Q4) A town of discharges 15,000 m'd of treated wastewater into a Creck. The treated wastewater ha...
Q4) A town of discharges 15,000 m'd of treated wastewater into a Creck. The treated wastewater has The treated wastewater has a BOD, of 10 mg/L and a ko of 0.12 d'. The creek has a flow rate of 0.6 m's and an ultimate BOD of 6 mg/L. The DO of the creek is 7 mg/L and the DO of the waste water is 1 mg/L. The creek has the temperature of 7 °C while the wastewater has a temperature...
The Big Bear town council has asked that you determine whether the discharge of the town's wastewater into the Salmon River will reduce the DO below the state standard of 3.00 mg/L. The DO at sat...
The Big Bear town council has asked that you determine whether the discharge of the town's wastewater into the Salmon River will reduce the DO below the state standard of 3.00 mg/L. The DO at saturation at 28 C is 7.81 mg/L. The other pertinent data follow. (16 pts) 2. Salmon River Big Bear Wastewater Parameter0,580 Flow, m/sec BODs, mg/L Ultimate BOD, mg/L DO, mg/L ka, d k d Speed, m/sec Temp, C 0.580 9 mg/L 7.00 6.70 0.322 0.852...
O The town of Gangnam in Seoul, Korea discharges 17360 m3/day of treated wastewater in the Han River. The treated wastewater has a BOD5 of 12 mg/L and a BOD decay constant, k, of 0.12 day at 20 °C. The river has a flow rate of 0.43 m/s and an ultimate BOD, Lo, of 5 mg/L. The DO of the river is 6.5 mg/L and the D0 of the wastewater is 1.0 mg/L (a) Calculate the ultimate BOD of the...
Determine the minimum dissolved oxygen (DO) concentration in a river downstream from a wastewater treatment plant (WWTP) discharging at a flow rate of 5.00 million gallons per day (MGD). The WWTP achieves secondary treatment standards (BOD5 = 30 mg/L). The wastewater temperature is 25.0 °C and contains 4.0 mg/L of DO. The characteristics of the river upstream from the point of discharge are Q=20.0 cubic feet per second (cfs), T = 20.0°C, BODu = 3.0 mg/L. and DO = 7.0...
A tannery discharges wastewater into a river under the following conditions: Parameter Wastewater River 1.148 Flow (m/s) BOD, at 15°C (mg/L) DO (mg/L) Temperature, Speed (m/s) Depth (m) 1.00 15.0 7.222 7.66 6.00 15.0 0.300 2.92 The BOD rate constant, k, in the river/wastewater mixture is measured as 0.379 d at 20°C. Deter- mine the ultimate BOD (in kg/d) that the tannery may discharge and still keep the DO in the minimum DO in the river above 5 mg/L.
A wastewater discharge has a flow equal to upstream flow of the river it is being discharged into. The river upstream has a DO of 7 mg/L, and negligible BOD. The wastewater discharge has an ultimate BOD of 50 mg/L, and negligible DO. It is determined that it would cost an equal amount of money to reduce the BOD to 25 mg/L or to increase the DO to 8 mg/L. Which alternative, considering DO sag, would you judge to be...
Q4) A town of discharges 15,000 m'd of treated wastewater into a Creck. The treated wastewater has The treated wastewater has a BOD, of 10 mg/L and a ko of 0.12 d'. The creek has a flow rate of 0.6 m's and an ultimate BOD of 6 mg/L. The DO of the creek is 7 mg/L and the DO of the waste water is 1 mg/L. The creek has the temperature of 7 °C while the wastewater has a temperature...
The Big Bear town council has asked that you determine whether the discharge of the town's wastewater into the Salmon River will reduce the DO below the state standard of 3.00 mg/L. The DO at saturation at 28 C is 7.81 mg/L. The other pertinent data follow. (16 pts) 2. Salmon River Big Bear Wastewater Parameter0,580 Flow, m/sec BODs, mg/L Ultimate BOD, mg/L DO, mg/L ka, d k d Speed, m/sec Temp, C 0.580 9 mg/L 7.00 6.70 0.322 0.852...
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