Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
권호 표지

Effects of Pressure and Dissolved Oxygen Concentration on the Activated Sludge

압력 및 용존산소 농도가 활성슬러지에 미치는 영향

  • Yang, Byeong-Su (Department of Environmental Science and Engineering, National Fisheris University of Pusan) ;
  • Sin, Hyeon-Mu (Department of Environmental Science and Engineering, National Fisheris University of Pusan) ;
  • Jeong, Hyeong-Suk (Department of Environmental Science and Engineering, National Fisheris University of Pusan) ;
  • Ryu, Dong-Chun (Department of Environmental Science and Engineering, National Fisheris University of Pusan) ;
  • Yun, Jong-Ho (School of Civil Eng., Purdure Univ.) ;
  • Jeong, Byeong-Gon (Dept. of Marine Environment. Kunsan National University)
  • 양병수 (부산수산대학교 환경공학과) ;
  • 신현무 (부산수산대학교 환경공학과, School of Civil Eng., Pursue Univ. 군산대학교 해양환경학과) ;
  • 정형숙 (부산수산대학교 환경공학과) ;
  • 류동춘 (부산수산대학교 환경공학과) ;
  • 윤종호 ;
  • 정병곤 (군산대학교 해양환경학과)
  • Published : 1995.08.01

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Abstract

This study was conducted to evaluate the effects of pressure and dissolved oxygen concentration on the activated slut비e and to determine the optimum depth of deep shaft process. Some results from this study were summarized as follows. 1. It is considered that low sludge product in the activated sludge system maintaining high dissolved oxygen concentration is attributed to the increase of endogeneous respiration rate caused by the increase of aerobic zone in the sludge floe. 2. The increase of dissolved oxygen concentration does not affect to the increase of organic removal efficiency greatly and therefore the limiting factor is the substrate transfer into the inner part of floe. 3. The yield coefficient, Y is decreased in proportion to the increase of oxygen concentration. In this study, Y values arre ranged from 0.70 to 0.41 according to the variation of dissolved oxygen concentration from 18.0mg/$\ell$ to 258 mg/$\ell$. 4. The optimum depth of deep shaft process should be determined within the limits of non-toxicity to the microorganism and it is about loom in this study.

Keywords