Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Effects of Aerobic/non-aerobic Starvation Periods on the Physical Characteristics of Activated Sludge and Organic Removal Efficiency in SBR

폭기/비폭기 상태의 기근기간이 활성슬러지의 물리적 특성 및 유기물 제거에 미치는 영향

  • Oh, Hye-Ran (Department of Environmental Engineering, Changwon National University) ;
  • Kim, Sang-Soo (Environmental Cap System Research Department, National Institute of Environmental Research) ;
  • Moon, Byung-Hyun (Department of Environmental Engineering, Changwon National University) ;
  • Yoon, Cho-Hee (Department of Environmental Engineering, Kyungnam University)
  • 오혜란 (창원대학교 환경공학과) ;
  • 김상수 (국립환경과학원 수질총량연구과) ;
  • 문병현 (창원대학교 환경공학과) ;
  • 윤조희 (경남대학교 환경공학과)
  • Received : 2010.01.16
  • Accepted : 2010.02.05
  • Published : 2010.03.30
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Abstract

The objective of this study was to investigate the effects of starvation periods with aerobic or non-aerobic conditions on the organic removal efficiencies and physical characteristics of activated sludge for treating saline and non-saline wastewater. During the experiment, MLSS, MLVSS, sludge volume index (SVI), floc size and fractal dimension, $COD_{Mn}$ removal efficiencies were monitored. The reductions of MLSS, MLVSS and SVI with maintaining the sludge under a non-aerobic condition during starvation periods were smaller than those under a aerobic condition. Floc size, fractal dimension and $COD_{Mn}$ removal efficiencies were less decreased under non-aerobic condition than under aerobic condition. And SVI were strongly correlated with floc size and fractal dimension. Consequently, the result showed that maintaining the activated sludge under non-aerobic starvation conditions was better strategy than that under aerobic starvation conditions as it adapted and resisted to starvation.

Keywords

References

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