| Summary: | 碩士 === 國立成功大學 === 環境工程研究所 === 83 === In this research, the effluents from both the sand filter and
GAC column of the pilot plant were collected. Both waters were
ozonated in the laboratory by small ozone-contacting column.
The effect of the amount of ozone transferred, bromide
concentration, and pH value, on the formation of halogenated
organic compounds and bromate were studied. The results
indicate that : GAC adsorption were more effective than the
sand filtration for dissolved organic removal. The NPDOC
removal for the former was over 80%. The THM, THMFP, HAA and
HAAFP of the effluent from GAC column were generally lower than
those from the latter. However, under the similar experimental
conditions, the bromate formation from the GAC column effluent
was higher than that from the sand filter effluent. And High
bromide, residual ozone, and the pH value will facilitate the
production of bromate. When sand filter effluent was subjected
to ozonation and subsequent chlorination, the trihalomethane
(THM) and its formation potentials reduced with increasing
amount of ozone transferred, while haloacetic acids (HAA) and
its formation potentials increased with increasing ozone
transferred. As far as the effect of bromide concentration was
concerned, HAA and HAAFP decreased with the amount of bromide
spiked, while the variations of THM and THMFP were minor. And
the portions of the THM, THMFP, HAA and HAAFP contributed by
brominated specices were increased with increasing bromide
concentration. And THM, THMFP, HAA and HAAFP concentrations
were found to be increased with increasing pH value.
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