In order to determine the location of average concentration and distribution status of dissolved oxygen in the rectangular aeration tank of the sewage treatment plant was analyzed and the difference of dissolved oxygen concentration was remarkable at each location. Compared with the computational fluid dynamics analysis, it was found that the results were consistent with the measurement results by showing the difference of dissolved oxygen concentration between the locations. Based on the measured data, the representative location of dissolved oxygen in aeration tank was selected by using statistical analysis method and the representative location was expressed in three-dimensional coordinates(LWH : 25%, 50%, 33%) from flow direction and left wall. Also the difference between the dissolved oxygen concentration at the actual measurement location and the average concentration value of the entire aeration tank was founded, and the equations for calibrating the automatic measurement data considering the actual measurement location were calculated.

ABSTRACT
1. 서 론
2. 연구방법
3. 결 과
    3.1 용존산소 분포 특성
    3.2 CFD 분석
    3.3 대표지점선정
4. 결 론
References

• 방석용(인천대학교 도시과학대학 건설환경공학부) | Seok-Yong Bang (Department of Civil and Environmetnal Engieering, Incheon National University)
• 범봉수(경인여자대학교 보건환경과) | Bong-Su Bum (Department of Human and Enviromental, Kung-In Womens’s University)
• 김진한(인천대학교 도시과학대학 건설환경공학부) | Jin-Han Kim (Department of Civil and Environmetnal Engieering, Incheon National University) Corresponding author