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Feasibility Study on Electro Coagulation Flocculation for Microalgae Harvesting

수처리용 미세조류의 수확을 위한 전기응집기술의 적용

Lee, Seok Min;Cho, Jae Hyung;Noh, Kyung Ho;Zhang, Shan;Hwang, Hyeon-Jeong;Nam, guisook;Hwang, Sun-Jin
이석민;조재형;노경호;장산;황현정;남귀숙;황선진

  • Received : 2015.10.15
  • Accepted : 2015.11.26
  • Published : 2015.12.15

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

Electro coagulation;Harvesting;Microalgae;Scenedesmus dimorphus

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Acknowledgement

Grant : 환경정보 NEXUS 산학연인력양성사업팀