• 1.0 m³/s of wastewater contains 20 mg/L of ammonium ion (as N; NH4 -N). It is necessary to nitrify the ammonium to nitrate (NO3 - )
• a. How many kilograms per day (kg/d) of the ammonium (as N) must be nitrified? 
• b. How many kg/d of oxygen is needed assuming all is used for nitrification? 
• c. How many kg/d of oxygen needs to be supplied to the treatment system if only 10% of the oxygen in air can be transferred (as DO) to the process? 
• d. Using the kg/d determined in part c., what m3/min air rate is needed at 20°C and 1.0 atm if the air contains 23% oxygen by mass?
•  pV = nRT Gas constant: R = 8.21 x 10^-5 atm·m³ ·mole^-1 K^-1 Density of air = 1.2 kg/m³

Answer rating: 100% (QA)

To solve the given problem well break it down into four parts Given Wastewater flow rate 10 m3s Ammo... View the full answer