This study was performed to investigate the contamination characteristics of water in the scrubber with the aim of stably maintaining the scrubber, and to comprehend the removal characteristics of sulfur compounds, which are odorous substances, when microbubbles were supplied to the circulation water tank of a scrubber. The results of our analysis found that 63 kinds of gas compounds were detected from the scrubber, and thus it could be determined that Sulfur compounds, Ammonia (base compounds), Aldehyde compounds, and Pyrazine compounds were generated from the process for the production of sesame oil. About 93% of ammonia was removed in the scrubber; however, it was hard to remove Sulfur compounds, Aldehyde compounds and Pyrazine compounds using the scrubber. The efficiency of hydrogen sulfide, methylmercaptan and dimethydisulfide removal using only water in the scrubber was 79.8%, 79.7%, and 81.0%, respectively. However, when microbubbles were supplied to the scrubber, the removal efficiency for each was 83.7%, 91.1%, and 96.1%, respectively. Therefore, it was confirmed that the efficiency of sulfur compound removal was improved by supplying microbubbles to the circulation water tank of the scrubber. In addition, the amount of removal that could be achieved by using microbubbles was 1.05- 1.19 times higher than using only water. In terms of supplying microbubbles, it was confirmed that the saturation time required to absorb odorous gases was about 2.8 times longer than the time without microbubbles because the OH radicals generated when the microbubbles are shrinking partly oxidized organic matter. When there was no chemical in the circulation water tank, the conductivity and CODCr concentration were highly correlated. Therefore the system, which can replace circulation water by using real-time conductivity data, can be considered to be applicable.

Abstract
 1. 서 론
 2. 연구방법
 3. 결 과
  3.1 악취물질 특성
  3.2 마이크로버블에 의한 황화합물 제거
  3.3 마이크로버블에 의한 세정수 오염도 지연
 4. 결 론
 References

• 임지영(인천대학교 도시과학대학 건설환경공학부) | Ji-Young Lim (Dept. of Civil and Environmental Engineering, Incheon National University)
• 김현식(인천대학교 도시과학대학 건설환경공학부) | Hyun-Sik Kim (Dept. of Civil and Environmental Engineering, Incheon National University)
• 방석용(인천대학교 도시과학대학 건설환경공학부) | Seok-Yong Bang (Dept. of Civil and Environmental Engineering, Incheon National University)
• 범봉수(경인여자대학교 보건환경과) | Bong-Su Bum (Dept. of Human and Environmental, Kyung-In Women’s University)
• 김진한(인천대학교 도시과학대학 건설환경공학부) | Jin-Han Kim (Dept. of Civil and Environmental Engineering, Incheon National University) Corresponding author