To raise the oxygen concentration level in wastewater, air is injected through spargers located near the bottom of a water-holding, aeration tank. Oxygen is transferred from the released air bubbles...

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Extracted text: To raise the oxygen concentration level in wastewater, air is injected through spargers located near the bottom of a water-holding, aeration tank. Oxygen is transferred from the released air bubbles into the surrounding aqueous phase. Oxygen has a Partial pressure of 0.21atm in the air, and a concentration of 8 × 10¬*kmoles/m³ in the wastewater. Density of water is 997kg/m³, and molecular weight is 18g/mol. Determine 1. Overall liquid mass-transfer coefficient KG; 2. Percent resistance encountered in the liquid phase at 293K; 3. Flux of A; 4. Concentration PA.i on the gas side of the interface and CA.i on the liquid side of the interface. Data: kL = 2.15 × 10-°kmoles/m² . s · (kmole/m³), kG = 9.28 x 10-8 kmoles/m² . •S : •s· Pa; H1 = 4.06 x 10°Pa/(moles of oxygen per total moles of solution).