Modelling inhibition of microbes responsible for acceleration of chloramine decay in water supply system

Abstract

Nitrification, a microbial process, is the most serious problem effecting chloramine residual management in water supply system. Through understanding of fundamental mechanisms of disinfectant decay and nitrification, the study for the first time demonstrated the effects of pH, temperature and copper concentrations on nitrification and chloramine decay. Investigation by dosing copper by varying dosing point, concentration, pattern, and frequency in a simulated distribution system has demonstrated that precise dosing point and timing were crucial.