Journal of Marine Bioscience and Biotechnology (한국해양바이오학회지)

The Korean Society for Marine Biotechnology (한국해양바이오학회)
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Verification of a Relationship between Ultraviolet Radiation and Initial Microalgal Cell Density Using a Floating Marine Photobioreactor

부유형 해양 광생물반응기를 이용한 자외선과 초기 미세조류 접종 농도와의 상관관계 규명

  • Kim, Z-Hun (National Marine Bioenergy Research Center & Department of Biological Engineering, Inha University) ;
  • Park, Hanwool (National Marine Bioenergy Research Center & Department of Biological Engineering, Inha University) ;
  • Jung, Seong-Gyun (National Marine Bioenergy Research Center & Department of Biological Engineering, Inha University) ;
  • Kim, Su-Kwon (National Marine Bioenergy Research Center & Department of Biological Engineering, Inha University) ;
  • Kim, Hee-Yun (National Marine Bioenergy Research Center & Department of Biological Engineering, Inha University) ;
  • Park, Yong Sung (National Marine Bioenergy Research Center & Department of Biological Engineering, Inha University) ;
  • Hong, Han Ma Roo (National Marine Bioenergy Research Center & Department of Biological Engineering, Inha University) ;
  • Lee, Choul-Gyun (National Marine Bioenergy Research Center & Department of Biological Engineering, Inha University)
  • 김지훈 (해양바이오에너지 생산기술개발연구센터 & 인하대학교 생물공학과) ;
  • 박한울 (해양바이오에너지 생산기술개발연구센터 & 인하대학교 생물공학과) ;
  • 정성균 (해양바이오에너지 생산기술개발연구센터 & 인하대학교 생물공학과) ;
  • 김수권 (해양바이오에너지 생산기술개발연구센터 & 인하대학교 생물공학과) ;
  • 김희윤 (해양바이오에너지 생산기술개발연구센터 & 인하대학교 생물공학과) ;
  • 박용성 (해양바이오에너지 생산기술개발연구센터 & 인하대학교 생물공학과) ;
  • 홍한마루 (해양바이오에너지 생산기술개발연구센터 & 인하대학교 생물공학과) ;
  • 이철균 (해양바이오에너지 생산기술개발연구센터 & 인하대학교 생물공학과)
  • Received : 2015.12.30
  • Accepted : 2016.01.07
  • Published : 2015.12.31
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Abstract

The purpose of this study was to investigate a relationship between ultraviolet radiation and initial cell density (ICD) of microalgae using a floating marine photobioreactor (PBR). To examine the effect of ultraviolet (UV) radiation in sunlight on biomass productivity as a function of ICD, 0.5-L floating PBRs covered with or without UV cut-off film were placed in an outdoor rectangular tank containing 200 L of water. At the lower ICDs, 0.01 and 0.05 g/L, biomass productivities in the PBRs without UV cut-off film decreased by $278{\pm}21%$ and $222{\pm}3%$ compared with those with the film, respectively. In contrast, the presence of UV cut-off film did not have a significant effect on biomass productivities at the higher ICDs, 0.25 and 1.25 g/L. When the differences in biomass productivity made by the UV cut-off film were plotted against the sum of cell projection area per light receiving area of the PBR, the results revealed that the inhibitory effect of UV on biomass productivity can be negligible when the sum of cell projection area is equal to the light receiving area of the PBR. These results show that photoinhibition caused by UV radiation could be eliminated via operating the PBR with a proper ICD.

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References

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