Récupération de microalgues en eaux usées : étude comparative de divers agents floculants
- 1 June 1984
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Civil Engineering
- Vol. 11 (2) , 266-272
- https://doi.org/10.1139/l84-039
Abstract
Flocculation appears to be the best technique for harvesting microalgae produced during a biological tertiary treatment of domestic wastewaters. Inorganic salts (Al2(SO4)3, KAl(SO4)2, Ca(OH)2) and chitosan have been compared in this respect. Chitosan appears to be the most satisfactory with reference to effectiveness and economy since recovery of 95% of the algae is possible with a dose of 30 mg L−1 at a pH of 7.0. The physiological condition of the algae influences their ability to flocculate, which is optimum from the end of the exponential growth phase to the plateau phase. Key words: flocculation, chitosan, alum, microalgae, wastewaters, tertiary treatment.Keywords
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