This study is focused on effects of factors that affect the formation of THMs during chlorination in drinking water treatment. During the chlorination, chlorine consumption is increased by increasing the initial chlorine dose, the pH and the total dissolved solid (TDS) concentration. Also THMs formation is increased up to 58.82 μg/L and 55.54 μg/L by increasing initial chlorine concentration and increasing pH. However, concentration of chloroform is decreased by increasing TDS concentration. This is caused the cation(Na+) of the total dissolved solids preferentially reacts with the functional groups of the organic material which influence the trihalomethane formation. But total trihalomethane formation is increased up to 127.46 μg/L by Br- contained in the total dissolved solids. DOC reduction was not influenced by any of the factors.

ABSTRACT
 1. 서 론
 2. 연구방법
  2.1 실험재료
  2.2 실험방법
 3. 결과 및 고찰
  3.1 염소 주입량 및 pH에 따른 염소 소모 및 THMs생성 평가
  3.2 TDS 주입에 따른 염소 소모 및 THMs 생성 평가
 4. 결 론
 References

• 이슬기(숭실대학교 화학공학과) | Seulki Lee (Department of Chemical Engineering, Soongsil University)
• 곽연우(숭실대학교 화학공학과) | Yeonwoo Kwak (Department of Chemical Engineering, Soongsil University)
• 홍성호(숭실대학교 화학공학과) | Seongho Hong (Department of Chemical Engineering, Soongsil University) Corresponding author