OUTPUT Ex7.6.a
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At the peak demand, fraction of the oxygen supplied = 0.592 


 OUTPUT Ex7.6.b
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The total power required for the agitator before the air is turned on: 316 kW
The total power required for the agitator after the air is turned on: 203 kW


 OUTPUT Ex7.6.c
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The calculated value of kLa (mass transfer coefficient) of solution:0.22 (sec-1)
The calculated value of average dissolved O2 concentration: 2.87 (mg/L)


 OUTPUT Ex7.6.d
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The new calculated value of average dissolved O2 concentration  1.68 (mg/L)
The reactor is operated above critical O2 concentration