The following data are from the Ohio River in the vicinity of Cincinnati (mile 470) during low flow, September 1967. A. If the mean velocity of the river is 0.3 m s 1, calibrate the Streeter-Phelps model using the field data, and solve for the rate constant ka and kd. The saturation concentration for dissolved oxygen at the time of the survey was 8.3 mg/I, and the main wastewater discharge was at mile point 472. Distance(miles 460 465 470 472 475 480 490 500 510 520 540 560 580
BOD, mall 4 4 4 12 11 9.3 7.5 6 5.3 4.5 4 3 2.5
D. O., ma/l 7.5 7.8 6.7 5.3 3.8 3.2 2.8 2.8 3.1 4.1 5.3 9.3 7.5 6 5.3 4.5 4 2.5
B. waste load allocation. If the flow of the river was 5000 cfs, estimate the wastewater discharge in kg BOD d-1. How much waste is allowed (in kg BOD d-1)if the D. O. Concentration must be greater than 5.0 mg/1?