Estimate the total chlorine demand given the following water

Estimate the total chlorine demand given the following water chemistry information and estimate the breakpoint dose of chlorine and the recommended chorine dose for (cross) breakpoint disinfection. Use the empirical Cl2:NH3 ratio of 10 for your calculation. Table for question #3 (concentrations are in mg/L) fe2+ Mn2+ H2S NO2NH3 Org-N(organic nitrogen TOC 0.2 0.1 0.1 0.05 0.1 0.2 0.8

Solution

Total chlorine demand =•8mg/lit

Break point chlorination=•05mg/lit(because according to graph when the dose of chlorine is initially increase then graph goes on upward and suddenly break at a point & those point are called breakpoint chlorination)