Break point chlorination

BREAK POINT CHLORINATION

Break point chlorination refers to the amount of chlorine added to water beyond which any further addition of chlorine appears as free residual chlorine.

• When chlorine is added to water, it reacts with ammonia present in water to form chloramines.
• Chloramines along with chlorine oxidize organic matter and bacteria
  
• If a graph is plotted with residual chlorine on the Y-axis and the amount of chlorine applied on the X-axis, it can be seen that the curve rises steadily and falls suddenly indicating oxidation of organic matter
• The point beyond which any further addition of chlorine appears as free chlorine is called break point and addition of chlorine beyond break point is called break point chlorination.