# 1.0 m 3 /s of wastewater contains 20 mg/L of ammonium ion (as N; NH4 -N). It...

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## Question:

- 1.0 m
^{3}/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·m^{3}·mole^{-1}K^{-1}Density of air = 1.2 kg/m^{3}

**Related Book For**

## Probability and Statistical Inference

ISBN: 978-0321923271

9th edition

Authors: Robert V. Hogg, Elliot Tanis, Dale Zimmerman