SOME ASPECTS REGARING CHLORINE DECAY IN WATER DISTRIBUTION NETWORKS
LIANA IOANA VUŢĂ , GABRIELA ELENA DUMITRAN
ABSTRACT. – A major objective of drinking water treatment is to provide
microbiologically safe drinking water. The combination of conventional drinking
water treatment and disinfection has proved to be one of the major public health
advances in modern times. The quality of drinking water delivered to the
customer’s tap is influenced by a number of processes; namely water treatment,
disinfection and changes during transport of treated water via the distribution
system. All natural waters and even treated drinking water exerts disinfectant
demand due to the reactions with NOM and other constituents in water. Therefore,
the applied disinfectant dose must be sufficient to meet the inherent demand in
the treated water, to provide sufficient protection against microbial infection.
Thus, controlling free residual chlorine properly is definitely important to
ensure meeting regulatory requirements and satisfying customer needs.
This paper presents the main aspects regarding chlorine decay in drinking-water
distribution networks and, also a free chlorine decay simulation with EPANET2 on
Ramnicu Valcea water distribution system.
Keywords: drinking water quality, chlorine decay, distribution system, Epanet.