- 26 The Bod In A Stream Is 3 Mg L And The Dissolved Oxygen Do Is 9 0 Mg L Streamflow Is 15 Med A Treated Sewage Emu 1 (21.18 KiB) Viewed 43 times
26. The BOD in a stream is 3 mg/l, and the dissolved oxygen (DO) is 9.0 mg/l. Streamflow is 15 med. A treated sewage eMuent with BOD - 45 mg/l. is discharged into the stream at a rate of 5 mod. The DO of the sewage effluent is 2 ppm. Assuming that the deoxygenation rate constant is 02 per day, and the rexeration rate constant is 0.5d, and the saturation DO level is 11 ppm, determine the minimum DO level in the stream. (b) For a stream velocity of 0.5 us, how far (in km) downstream does the minimum DO occur? Max. 15 Points] a) SHOW IN THIS BOX SOLUTION FOR MINDO: