Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Feasibility Study on Electro Coagulation Flocculation for Microalgae Harvesting

수처리용 미세조류의 수확을 위한 전기응집기술의 적용

  • Lee, Seok Min (Department of Environmental Engineering, Center for Environmental Studies, Kyung Hee University) ;
  • Cho, Jae Hyung (Department of Environmental Engineering, Center for Environmental Studies, Kyung Hee University) ;
  • Noh, Kyung Ho (Department of Environmental Engineering, Center for Environmental Studies, Kyung Hee University) ;
  • Zhang, Shan (Department of Environmental Engineering, Center for Environmental Studies, Kyung Hee University) ;
  • Hwang, Hyeon-Jeong (Department of Environmental Engineering, Center for Environmental Studies, Kyung Hee University) ;
  • Nam, guisook (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)
  • 이석민 (경희대학교 공과대학 환경공학과.환경연구센터) ;
  • 조재형 (경희대학교 공과대학 환경공학과.환경연구센터) ;
  • 노경호 (경희대학교 공과대학 환경공학과.환경연구센터) ;
  • 장산 (경희대학교 공과대학 환경공학과.환경연구센터) ;
  • 황현정 (경희대학교 공과대학 환경공학과.환경연구센터) ;
  • 남귀숙 (경희대학교 공과대학 환경공학과.환경연구센터) ;
  • 황선진 (경희대학교 공과대학 환경공학과.환경연구센터)
  • Received : 2015.10.15
  • Accepted : 2015.11.26
  • Published : 2015.12.15
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Abstract

Although microalgae are considered as a promising feedstock for biofuels, cost-efficient harvesting of microalgae needs to be significantly improved. In this study, the use of electro coagulation as a more rapid flocculation method for harvesting a freshwater (Scenedesmus dimorphus) microalgae species was evaluated. The results showed that, electro coagulation was shown to be more efficient using an aluminum anode than using an iron anode. And optimum conditions of electro coagulation for harvesting Scenedesmus dimorphus were found. The optimum stirring speed was 100 rpm and optimum pH was 5. Furthermore, the current density which the fastest and highest recovery efficiency is achieved at $30A/m^2$, while the highest energy efficiency was achieved at $10A/m^2$. A the rapid and high recovery efficiency indicate that electro coagulation is a particularly attractive technology for harvesting microalgae.

Keywords

References

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