THM GENERATION DURINGWATER TREATMENT PROCESS AND INSIDE THEWATER DISTRIBUTION SYSTEM
Abstract:
The water chlorination procedure, successfully
used for the control of water borne infections diseases for
more than a century determines the formation of
chlorination byproducts, such as halogenated
trihalomethane formed from the reaction of natural
organic matter present in all types of water, with chlorine
used as a disinfectant in water treatment. The total
concentration of trihalomethane and the formation of
individual THM species in chlorinated water strongly
depend on the composition of the raw water, especially on
the presence of the natural organic matter in water, on
operational parameters, such as ultrafiltration and
chlorine dose, reaction time, temperature/season, pH and
in the distribution system by the pipe environment created
from the occurrence of residual chlorine, the material
specific from the pipe wall (PVC), the bio film and the
bioactivity of bacterial growth in bio film.
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