Korean Society for Biotechnology and Bioengineering Journal Korean Society for Biotechnology and Bioengineering Journal

pISSN 1225-7117 eISSN 2288-8268

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Korean Society for Biotechnology and Bioengineering Journal 2012; 27(2): 103-108

Published online April 30, 2012

Copyright © Korean Society for Biotechnology and Bioengineering.

Flocculation과 Dissolved Air Floatation을 이용한 미세조류 수확 최적화

Optimization of Microalgae Harvesting Using Flocculation and Dissolved Air Floatation

권혁진(서강대학교 화공생명공학과), 정창규(서강대학교 화공생명공학과), 김남훈(세화고등학교), 이진원(서강대학교 화공생명공학과)

Abstract

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