Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7066879 | Bioresource Technology | 2018 | 37 Pages |
Abstract
This work investigated the production of Scenedesmus sp. in semi-continuous mode in three pilot-scale outdoor raceways (7.2â¯m2) using flue gas for CO2 supply and centrate from the anaerobic digestion of urban wastewater as the sole nutrient source. Experiments were performed at different culture depths, 5, 10 and 15â¯cm, while evaluating two centrate concentrations (30% and 45%) at dilution rates of 0.2 and 0.3â¯dâ1. Under optimal conditions of 30% centrate, 0.3â¯dâ1 dilution rate and a 15â¯cm culture depth, a maximum biomass productivity of 22.9â¯gâ¯mâ2â¯dâ1 was obtained. The optical properties of the cultures were studied and the results showed a photosynthetic efficiency of up to 2.0% and a quantum yield of 0.3â¯gâ¯biomassâ¯Eâ1. Nitrogen and phosphorus removal rates of 3â¯gâ¯Nâ¯mâ2â¯dâ1 and 0.6â¯gâ¯Pâ¯mâ2â¯dâ1 were recorded, respectively. Lipid productivity of 2.3â¯gâ¯mâ2â¯dâ1 was determined possessing a suitable fatty acids profile for biofuel production.
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Authors
Ahlem Jebali, F. Gabriel Acién, Erika Rodriguez Barradas, Eugenia J. OlguÃn, Sami Sayadi, Emilio Molina Grima,