The main objectives of this research are to investigate characteristics of ozone solubility due to low solubility of conventional bubbles-ozone generators, evaluate the treatment characteristics of reclaiming textile wastewater for industrial water by means of micro/nano bubbles-dissolved ozone flotation(MNB-DOF) process. The textile wastewater used in this research was obtained from final effluent of the textile wastewater in B city. There is a 400L reactor which consists of a micro-nano bubble system and a ozone generator for experiments. As a result of generating micro-nano bubbles (below 0.5 ㎛) by using of MNB-DOF process, it improved ozone solubility due to higher ozone transfer rates. Consequently, the shorter ozonation time clearly indicates the lower power costs. The reported results clearly indicated that MNB-DOF process can be effectively and inexpensively. Results of the experiments through MNB-DOF process in this study satisfy all reclaiming standards as industrial water: pH 6.5～8.5, SS 10 mg/L or below, BOD_5 6 mg/L or below, turbidity 10 NTU or below, Coliforms 1,000/100 mL or below. Therefore there is a possibility of the reclaiming of the textile wastewater as industrial water.

Abstract
 1. 서 론
 2. 재료 및 방법
  2.1. 실험재료
  2.2. 실험장치 및 방법
 3. 결과 및 고찰
  3.1. 오존용해효율
  3.2. 염색폐수 처리특성
 4. 결 론
 참 고 문 헌

• 정병길(동의대학교 환경공학과) | Byung-Gil Jung (Department of Environmental Engineering, Dong-Eui University)
• 정진희(동아대학교 환경공학과,) | Jin-Hee Jung (Department of Environmental Engineering, Dong-A University)
• 성낙창(동아대학교 환경공학과,) | Nak-Chang Sung (Department of Environmental Engineering, Dong-A University) Corresponding Author
• 이기형(부산광역시 수영구청) | Ki-Hyung Lee (Suyeong Busan Metropolitan)
• 장성호(부산대학교 지역환경시스템전공) | Seong-Ho Jang (Department of Regional Environmental System Engineering, Pusan National University)
• 조도현((주)네가트론) | Do-Hyun Cho (Negatron Co., Ltd)