The following data was obtained using surface aerators in tap water and wastewater at 15 C. The saturated dissolved oxyg

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The following data was obtained using surface aerators in tap
water and wastewater at 15 C. The saturated dissolved oxygen
concentration is 10 mg/L. Use the data to obtain KLa in
min-1 for the tap water and the
wastewater.
Time, sec
tap water conc, mg/L
wastewater conc, mg/L
0
0
0
1200
3.1
2.1
2400
5.4
3.7
3600
6.8
5.0
4800
7.9
6.1
6000
8.6
6.9
The KLa for the tap water is __________
The KLa for the wastewater is _______