The dissolved oxygen concentration of the mixture is 1.5*2+7*6/1.5+7
= 5.3 mg/l
? ? Mine water flowing at 1.5 m3/s with 2 mg/l dissolved oxygen, joins river water...
6 MGD of wastewater with a dissolved oxygen concentration of 0.9 mg/L is discharged to a river flowing at 40 ft'/sec. The river initially is saturated with oxygen. The saturation DO is 11.30 mg/L. The oxygen content of the river (mg/L) immediately after mixing is most nearly: (conversion factor: 7.48 gal= 1 ft') 1.30 9. 34 9.00 8.85 7.24 other, write your answer 6 MGD of wastewater with a dissolved oxygen concentration of 0.9 mg/L is discharged to a river...
Calculate the concentration in units of mg/L for oxygen dissolved in 1050.0 mL of water at 25 °C, if the partial pressure of O2 in gas phase in equilibrium with the water is 238.1 mm Hg. Assume the density of water =1 g/mL
A factory is discharging wastewater containing 200 mg/L BOD into a river. The river has a discharge of 10 m3/s and the wastewater discharge is 2 m3/s. If the upstream of this river has a BOD of 10 mg/L. Please compute BOD after wastewater is completely mixed with river (any BOD degradation is not considered)
A river is sampled at point A. The following results are measured: ultimate BOD=25 mg/L, dissolved oxygen= 6.5 mg/L, dissolved oxygen at saturation = 10.5 mg/L, deoxygenation rate=0.15 d-1, reaeration rate=0.35 d-1, stream velocity= 0.5 m/s. In how many days is the critical point downstream of Point A?
River Pascal with a volume flow rate of 5.0 x105 L/s joins with River Archimedes, whichcarries 10.0 x 105 L/s, toform the Bernoulli River. The Bernoulli River is 150m wide and 10 m deep. Whatis the speed of the water in the Bernoulli River?
A river is flowing at a flow rate of 12 cubic meters per second with a background BOD of 2 milligrams per liter of Dissolved Oxygen. A large waste spill with a five day BOD of 230 mg/L is discharged into the river at a flow rate of 2 cubic meters per second. Assuming instantaneous mixing immediately at the point of discharge, find the ultimate BOD of the river water after mixing with the waste.
An industrial unit releases 70 000 gpm water having 500 mg/L solids to a creek. The flow rate of creek is 50 m3/s and its solid concentration is 400 ppm. The creek meets a river with a flow rate of 350 m3/s ar i a solid concentration of 80 ppm. Calculate the flow rate and concentration of solid in the river downstream of the confluence in m'/s and mg/L, respectively. 70 000 gpm 500 mg/L Industrial 50 m3/s 400 ppm...
Calculate the mass of oxygen (in mg) dissolved in a 5.00 L bucket of water exposed to a pressure of 1.13 atm of air. Assume the mole fraction of oxygen in air to be 0.41 and the Henry's law constant for oxygen in water at this temperature to be 1.3 × 10-3 M/atm. 96.3 mg 49.4 mg 63.2 mg 48.2 mg
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...
ml of river water with BODs of 1000 ppm is diluted to 1 L, aerated and seeded. The If 2 disolved oxygen content was 7.8 mg/L initially. After 20 days, the dissolved oxygen ssolv content had dropped to 5.3 mg/L. What is the ultimate BOD, and remaining BOD? Which of the two BODs give better prediction of BODL, and why? ml of river water with BODs of 1000 ppm is diluted to 1 L, aerated and seeded. The If 2...