LEAL, E. S.; http://lattes.cnpq.br/7463460368248904; LEAL, Erick dos Santos.
Résumé:
The water supply in sufficient quantity and quality is essential to reduce
the occurrence of waterborne diseases. The quality of water supplied in the
supply system is provided by the disinfection treatment step responsible for the
elimination of pathogenic microorganisms. The most commonly used
disinfecting agent in the treatment stations is chlorine, as it has a number of
advantages, including maintaining a residual water that protects against
contamination throughout the distribution system. The concentration limit of the
residual that must be satisfied at all points of the network, currently is regulated
by the ordinance MS 2914/11. This is a major challenge for the utilities that due
to the distance of the points and the ignorance of the behavior of chlorine in the
system, practice super chlorination, action that may pose a health risk to
consumers. Accordingly, many operators use of tools that simulate the behavior
of chlorine in the system using the kinetic parameters that represent chlorine
consumption in the distribution system. The objective of this study is the
determination and calibration of these parameters, which will be used in
modeling the water quality of treated water pipeline system of Campina Grande-
PB. The determination of the kinetic coefficients of the reaction mass (kb) was
made by the laboratory procedure called the test bottle and the reaction with the
wall (kw) estimated by trial and error. The calibration of the model used the
quality EPANET 2.0, which is a free simulator developed by the EPA. It was
observed the predominance of reaction coefficients in the volume of flow, and a
strong relationship of changes in operational behavior of the system with
consumption of chlorine. The results showed that absence of a defined
procedure for determining the kinetic coefficients gives rise to uncertainty in the
model, necessitating development of a more appropriate system changes.
