Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
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Potential Use of Microalgae Scenedesmus acuminatus for Tertiary Treatment of Animal Wastewater

축산폐수 고도처리를 위한 미세조류 Scenedesmus acuminatus의 이용 가능성

  • 박기영 (건국대학교 사회환경시스템공학과) ;
  • 임병란 (서울과학기술대학교 환경공학과) ;
  • 이기세 (명지대학교 환경생명공학과) ;
  • 이수구 (서울과학기술대학교 환경공학과)
  • Received : 2010.12.16
  • Accepted : 2011.01.20
  • Published : 2011.01.31
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Abstract

The green algae Scenedesmus acuminatus was cultured in different media: animal wastewater and an artificial culture medium in order to evaluate potential use for tertiary treatment. The experiments were conducted with air flowrate 1~2 L/min at $28{\sim}30^{\circ}C$. The nitrogen and phosphorus showed very similar removal efficiencies (68~77 % and 69~80 % for nitrogen and phosphorus respectively). The optimal fed period was estimated as three days in the semi-continuous experiment. The effects of $CO_2$ (4.5 %) injection on nutrient uptake from animal wastewater (biological treatment effluent) were compared to an air injection under the same conditions of light and photoperiod. The uptake rates of nutrient with air injection were observed 0.009 gN/gChl-a/day, 0.028 gN/gChl-a/day and T-P 0.003 gP/gChl-a/day for nitrate, total nitrogen and phosphorus respectively. The rates were enhanced by addition of $CO_2$ to 0.026 gN/gChl-a/day, 0.076 gN/gChl-a/day and T-P 0.018 gP/gChl-a/day. This study establishes that $CO_2$ addition during nutrient deprivation of microalgal cells may accelerate tertiary wastewater treatment.

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