The following ultimate CBOD data were measured in a stream. Find the deoxygenation 3. rate constant,...
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?
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...
Determine the rate constant and ultimate BOD from the following data: (3 oints Time (day) (mg/L) BOD 65 109 138 158 178 190 200 205 210 212 4 10
t College of Engineering I0 Ouestion 2 reaction rate constant at 20 "C was determined to be 0.27 (a) Determine the BOD exerted in the water after 5 days at 20-C (10%) (b) The temperature of the paper mill emuert is 23°C, 0 057 m's of wastewater which has an ultimate B0D of 720 mg/l. The What is the actual BODs being discharged to the stream ( 10%)? (c) If the paper mill effluent is discharged into a stream having...
The following data were measured in a 40 liter bioreactor by a dissolved oxygen electrode during a cycle in which the air supplied was shut-off and then restarted. (The system automatically restarted the air supply when the DO reached a minimal acceptable value.) The cell concentration at the time the data were collected was 0.96 g/L Time (s Conc. O, (mg/L 6.33 6.33 6.33 5.78 5.22 4.66 4.10 3.55 2.99 2.43 2.54 3.12 3.59 3.95 4.24 4.45 4.59 4.74 4.87...
Given the following data, calculate the mass flow rate of air exiting a pipe. Pipe diameter = 2.47 in. Atmospheric Pressure = 12.38 psia Air Temperature = 61 °F The following total pressure to static pressures differences have been measured. Assume that all measurements were made along a line that passes through the center of the pipe. | Radius (inches) 1.25 1.00 0.75 0.5 0.25 Pressure Difference (psid) 0.012 0.019 0.0204 0.028 0.035 0.039 0.037 0.030 0.021 0.017 0.007 0.25...
3. (10 marks) Suppose you measured the speed of a shuttlecock falling, and got the following data points time (s) velocity (m/s) 0.25 3.3 0.5 0.75 4.8 5.5 5.9 1.25 1.5 1.75 (a) Use a Riemann sum to approximate the total distance travelled by the shuttlecock (b) Use the trapezoidal rule to approximate the total distance travelled by the shuttlecock. (c) Use the central difference formula to approximate the acceleration of the shuttlecock when t =0.75 s. (d) A model...
The following experimental data were obtained for the reaction 27 0255 6 Points Determine the reaction law and the value of the rate constant with correct unit. A] Rate AC (mol L ) (mol L 1) (mol L s1) 0 15 0033 0 127 0 132 0 127 0 30 0 066 0 15 0 255 The following experimental data were obtained for the reaction 27 0255 6 Points Determine the reaction law and the value of the rate constant...
The flow, F, in a river was measured as a function of time, t, and the following data were obtained. F (m/day) t (days) 10 x 106 4 x 106 2 x 106 1 x 106 0.5 x 106 0.2x 10 0 10 15 20 25 (a) Use numerical integration to estimate the total amount of water that flows down the river during these 25 days. (b) You expect that F will be given by Fo F(t) 1+ for some...
P: The following wind velocity data were recorded for the selected site:1, 2, 1, 2, 3, 3, 4, 3, 4, 5, 3, 4, 5, 6,7, 5, 4, 3, 2, 2. m/s Bin Nv Frequency Frequency F(v) 1-F(V) L (1. ..... F(v)) 0 0 0 2 0.1 0.1 0.9 0.7 0.45 0.25 0.1 0.2 0.15 0.05 0.05 0.95 0.05 5 2- Find the parameters k and c (shape parameter k and scale parameter c) b-Weibull distribution C-Draw the Weibull distribution d-Analyze...