Water Science & Technology: Water Supply Vol 1 No 2 pp 175–181 © IWA Publishing 2001
Trihalomethane (THM) reduction in Istanbul water treatment plants
AM Saatçı* and V Eroğlu**
*
Environmental Engineering Department, Marmara University, Goztepe,
Kadiköy, Istanbul, Turkey
**
Environmental Engineering Department, Istanbul Technical University,
Maslak, Istanbul, Turkey
ABSTRACT
This paper describes trihalomethane reduction in an Istanbul drinking water
plant. The total THM levels (TTHM) could be controlled by decreasing the
post-chlorination doses. After the commencement of the pre-ozonation
process, pre-chlorination was terminated and a sudden drop of THM values
in the effluent of the plant was observed. A predictive model that gives
a good fit to the observed TTHM levels during the 7 months operation of
the plant with and without the pre-ozonation process was presented.
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