Harvesting of microalgae using flocculation combined with dissolved air flotation

초록

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 similar to 10. The optimal dosage and pH level were 1.2 g/L and pH 5 similar to 6 for aluminum sulfate, 0.7 g/L and pH 4 similar to 8 for ferric sulfate, and 5.0 mg/mL and pH 7 similar to 8 for chitosan. The highest harvesting efficiency achieved with each of the four compounds was 85.6, 92.6, 93, and 91.3%, respectively.

키워드