Harvesting of microalgae cell using oxidized dye wastewater

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In this study, oxidized dye wastewaters were tested for their potential to be used as a cheap coagulant for microalgae harvesting. Two dyes (methylene blue (MB) and methyl orange (MO)) were selected as model dyes, and the Fenton-like reaction under high temperature (90 degrees C, 1 min) employed as an oxidative treatment option. A maximum harvesting efficiency over 90% was obtained with both MB and MO at a dilution ratio of 5: 1 (dye wastewater: cell culture), when the optimal oxidation condition was 20 mg/L of dye, 1 mM of FeCl3, and 0.5% of H2O2 concentration. This phenomenon could be explained by the possibility that amine groups are formed and exposed in oxidized dyes, which act as a kind of amine-based coagulant just like chitosan. This study clearly showed that dye wastewater, when properly oxidized, could serve as a potent coagulant for microalgae harvesting, potentially rendering the harvesting cost reduced to a substantial degree.
Publisher
ELSEVIER SCI LTD
Issue Date
2015-09
Language
English
Article Type
Article
Keywords

OLEAGINOUS CHLORELLA SP; METHYLENE-BLUE; AZO-DYE; FENTON; DEGRADATION; ORANGE

Citation

BIORESOURCE TECHNOLOGY, v.192, pp.802 - 806

ISSN
0960-8524
DOI
10.1016/j.biortech.2015.05.074
URI
http://hdl.handle.net/10203/200611
Appears in Collection
CE-Journal Papers(저널논문)
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