Determine the carbonaceous 5-day BOD and Crate tor an unchlorinated effluent after treatment by activated- sludge aeration, Draw the BOD time curve and grah for determination of the Crate. Nine identical test bottles were prepared, with 60 ml of wastewater added to each bottle followed by 240 ml of dilution water. Three bottles were titrated after setup to determine the initial DO of 8.1 mg/l. The remaining 6 bottles were incubated and tested for time-residual DO data with the following results: 1.3 days, DO = 7.2 mg/l; 3.3 days, 6.4 mg/l; 4.3 days, 6.2 mg/l; 5.3 days, 5.8 mg/l; 8.3 days, 4.5 mg/l; and 11.3 days, 3.5 mg/l.
We need at least 10 more requests to produce the solution.
0 / 10 have requested this problem solution
The more requests, the faster the answer.