What occurs to the chlorine demand of water after nitrification happens?

Chlorine demand significantly increases after nitrification occurs due to the presence of ammonia and organic nitrogen compounds being converted into nitrate. During this biological process, nitrifying bacteria consume oxygen for their metabolism, and in turn, they also lead to the production of additional chlorinated by-products when chlorine is added to the treated water. The presence of these additional substances can lead to a higher demand for chlorine in the water treatment process, as more chlorine is required to achieve effective disinfection and to satisfy the demand created by the reaction with organic nitrogen compounds. This increased chlorine demand must be accounted for in water treatment operations to ensure proper disinfection levels and to prevent any potential issues with water quality.