Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Effect of a co-culture of scenedesmus dimorphus and nitrifiers on advanced wastewater treatment capacity

Scenedesmus dimorphus와 질산화 박테리아의 공배양이 하수고도처리능에 미치는 영향

  • Choi, Kyoung-Jin (Department of Environmental Engineering, Center for Environmental Studies, Kyung Hee University) ;
  • Zhang, Shan (Department of Environmental Engineering, Center for Environmental Studies, Kyung Hee University) ;
  • Lee, SeokMin (Department of Environmental Engineering, Center for Environmental Studies, Kyung Hee University) ;
  • Joo, Sung-Jin (Department of Environmental Engineering, Center for Environmental Studies, Kyung Hee University) ;
  • Hwang, Sun-Jin (Department of Environmental Engineering, Center for Environmental Studies, Kyung Hee University)
  • 최경진 (경희대학교 환경공학과, 환경연구센터) ;
  • 장산 (경희대학교 환경공학과, 환경연구센터) ;
  • 이석민 (경희대학교 환경공학과, 환경연구센터) ;
  • 주성진 (경희대학교 환경공학과, 환경연구센터) ;
  • 황선진 (경희대학교 환경공학과, 환경연구센터)
  • Received : 2014.12.01
  • Accepted : 2014.12.12
  • Published : 2014.12.15
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Abstract

This study investigated the effect of a co-culture of Scenedesmus dimorphus and nitrifiers using artificial wastewater on the removal of ammonium, nitrate and phosphate in the advanced treatment. To test the synergistic effect of the co-culture, we compared the co-culture treatment with the cultures using S. dimorphus-only and nitrifiers-only treatment as controls. After 6 days of incubation, nitrate was removed only in the co-culture treatment and total amount of N removal was 1.3 times and 1.6 times higher in the co-culture treatment compared to those in the S. dimorphus- and nitrifiers-only treatments, respectively. In case of total amount of P, co-culture treatment removed 1.2 times and 12 times more P than the S. dimorphus -and nitrifiers-only conditions, respectively. This indicates that the co-culture improved removal rates for ammonium, nitrate, and phosphate. This further implies that there was no need for denitrification of nitrate and luxury uptake of P processes because nitrate and phosphate can be removed from the uptake by S. dimorphus. In addition, co-culture condition maintained high DO above 7 mg/L without artificial aeration, which is enough for nitrification, implying that co-culture has a potential to decrease or remove aeration cost in the wastewater treatment plants.

Keywords

References

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