Assignment:
We have a wastewater source whose flow is 2000 m3 per day; the stated BOD or bio-chemical oxygen demand in that wastewater is given as 5000 mg/l.
We are to use urea (NH2)2CO to provide nitrogen to the wastewater in a specific ratio of 100 parts (BOD) to 5 parts(Nitrogen) --- no more or no less.
The mass fraction of N in urea is given as 46.6% by weight; the solubility of urea in water is given as 51.6 grams/100 grams; and the density of the urea is provided as 760 kg/m3.
Given all of the above. How to calculate how much elemental Nitrogen is needed for this wastewater given the 100(BOD) to 5(N) ratio?
Provide complete and step by step solution for the question and show calculations and use formulas.