Korean Society for Biotechnology and Bioengineering Journal 2012; 27(2): 103-108
Published online April 30, 2012
Copyright © Korean Society for Biotechnology and Bioengineering.
권혁진(서강대학교 화공생명공학과), 정창규(서강대학교 화공생명공학과), 김남훈(세화고등학교), 이진원(서강대학교 화공생명공학과)
The harvesting of microalgae is a critical step that precedes biodiesel conversion. The most widely used harvesting technology is flocculation and floatation. In this study, the efficiency of the flocculants aluminum sulfate and poly aluminum chloride were evaluated for harvesting the alga Dunaliella tertiolecta in conjunction with dissolved air floatation. Using the jar test the optimum concentration range for aluminum sulfate was 1.0~1.5 g/L and for poly aluminium chloride, 1.5~2.0 g/L. The degree of coagulation was visualized by microscopy. Further analysis in combination with dissolved air floatation showed that the optimal concentration for aluminum sulfate was 1.1 g/L and for poly aluminum chloride, 1.6 g/L.
Keywords: Microalgae, Harvest, Dunaliella, Flocculation, Floatation, Dissolved air Floatation
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