Domestic sewerage treatment plant is operated by activated sludge method and its modified method by using microorganism. In most cases, a method of using microorganism is directly controlled by the operator based on individual judgment through factors of DO, pH and ORP. In addition, under aerobic condition in bioreactor, energy consumption including excessive air injection is learned to be somewhat plenty. In order to solve this problem, in most of the process, improvement of internal recycling and activated environmental factor of microorganism were researched extensively. However, as factors are changed depending on various conditions, it is not sufficient as an indicator of judgment. As such, a research on operation of bioreactor that measures metabolic change in short time by directly measuring activated condition of microorganism using NADH fluorometer is required in reality.It is considered that the method like this could supplement problem of energy consumption being occurred in the existing treatment method and operational optimization of bioreactor would be enabled by controlling optimal air volume. Therefore, in this study, in order to obtain optimal operational indicator of bioreactor, proper air volume control test was performed and through batch test and site evaluation, possibility of NADH sensor being utilized as operational control indicator of bioreactor is intended to be analyzed. In order to compare with measured value, DO, ORP that are operational control indicator of existing bioreactor were used. As MLSS concentration was increased through batch test, NADH value was increased and site evaluation also showed similar tendency to batch test. Resultantly, it could be confirmed that changing level of NADH fluorometer was a sensor that could measure bioreactor condition effectively and optimized scale of bioreactor is considered to be utilized.

1. 서 론
 2. 연구방법
  2.1. 회분실험 조건
  2.2. 현장실험 조건
  2.3. DO, pH, ORP, NADH 측정기기
  2.4. NADH 매커니즘
 3. 실험결과
  3.1. MLSS와 NADH의 관계
  3.2. 무산소, 혐기, 호기상태에 있어서 NADH, ORP 및DO의 거동(Run 2, Run 3)
  3.3. 현장측정
 4. 결 론
 감사의 글
 REFERENCES

• 정우진(경기대학교 일반대학원 환경에너지공학과, Department of Environmental Energy Engineering, Graduate School, Kyonggi University) | Woo-jin Chung
• 홍성민((주)아쿠아테크, Aqua Tech, Inc.) | Sung-min Hong
• 김한래((주)아쿠아테크, Aqua Tech, Inc.) | Han-lae Kim
• 장순웅(경기대학교 환경에너지공학과, Department of Environmental Energy Engineering, Kyonggi University) | Soon-woong Chang Corresponding author