Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Temperature Effect on the Nutrient Removal in the Combined Biological Nutrient Removal System (CBNR) with Anaerobic-Intermittent Aerobic-Modified Oxic Reactors

혐기조-간헐포기조-개량조로 구성된 영양소 제거 공정에서 온도의 영향

  • Kang, Young-Hee (Clean Environmental Research Institute, Dep. of Biosciences and Technology The Catholic University of Korea) ;
  • Han, Gee-Bong (Clean Environmental Research Institute, Dep. of Biosciences and Technology The Catholic University of Korea)
  • 강영희 (가톨릭대학교 생명공학부 청정환경연구실) ;
  • 한기봉 (가톨릭대학교 생명공학부 청정환경연구실)
  • Received : 2006.03.02
  • Accepted : 2006.06.23
  • Published : 2006.07.30
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Abstract

The temperature effect at $20^{\circ}$ and $10^{\circ}$ on the nutrient removal efficiency was evaluated in the combined biological nutrient removal system (CBNR) with anaerobic-intermittent aerobic-oxic reactors. The test was conducted under the conditions of various ratios of intermittent aeration time and distribution of influent raw water to CBNR. The removal efficiencies of organics, nitrogen and phosphorus were a little bit better at $20^{\circ}$ than at $10^{\circ}$. However the large difference of temperature effect on the nutrient removal efficiency between $20^{\circ}$ and $10^{\circ}$ was not appeared because of highly sustained MLSS concentrations in the reactors and controlled intermittent aeration time. In the removal of phosphorus, Mode III (50/70 min in aeration on/off time, 3 times of intermittent aeration) showed more effective compared with short aeration time of Mode IV. In case of N, P removal, the denitrification rate was lower in Mode A with splitted inflow into anaerobic and intermittent aeration basins than in Mode B with sole inflow into anaerobic basin.

Keywords

References

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