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KMID : 1094720140190010143
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Biotechnology and Bioprocess Engineering
2014 Volume.19 No. 1 p.143 ~ p.149
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Harvesting of microalgae using flocculation combined with dissolved air flotation
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Kwon Hyuck-Jin
Lu Mingshou
Lee Eun-Yeol
Lee Jin-Won
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Abstract
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This study explored efficient methods of harvesting the Tetraselmis sp. KCTC12236BP using flocculation and dissolved air flotation. Concentration ranges of flocculation agents were optimized using jar tests (batch flocculation experiments) using inorganic (aluminum sulfate, ferric sulfate) and organic (chitosan) flocculants in a pH range of 4 ∼ 10. The optimal dosage and pH level were 1.2 g/L and pH 5 ∼ 6 for aluminum sulfate, 0.7 g/L and pH 4 ∼ 8 for ferric sulfate, and 5.0 mg/mL and pH 7 ∼ 8 for chitosan. The highest harvesting efficiency achieved with each of the four compounds was 85.6, 92.6, 93, and 91.3%, respectively.
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KEYWORD
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dissolved air floatation, flocculation, chitosan, aluminum sulfate, ferric sulfate
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