In this study we investigated the removal characteristics of NOM and bromate formation
characteristics in SOMT reactor. The system was recently developed as a novel ozone
reactor and installed in SJ pilot plant. DOC values were decreased within 3percentage
after treatment of 0.5~2.0 mg/L ozone dosage in SOMT reactor while the UV254 value was
69percentage decreased at 2.0 mg/L ozone dosage. The composition of NOM was analysed by
LC-OCD(Organic Cabon Detector) after ozone treatment in SOMT reactor to elucidate the
variation of NOM character. Polysaccharide (more than 20,000 Da) fraction of NOM was
decomposed while building blocks (350~500 Da) and neutral (less than 350 Da) fraction
increased. Spiked bromide reacted with 0.5~2.0 mg/L ozone dosage in the SOMT reactor.
The bromate formation was proportional to the ozone dosage (R2 =0.978) but not
proportional to reaction time. The maximum concentration of formated bromate was not
exceeded to 10percentage of spiked bromide concentration.