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 3percent
after treatment of 0.5-2.0 mg/L ozone dosage in SOMT reactor while the UV254 value was
69percent 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 g/mol)fraction of NOM was
decomposed while building blocks (350~500g/mol) and neutral (less than 350g/mol)
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 10percent of spiked bromide concentration.