Produção Nacional
Revisado por pares
Growing Chlorella vulgaris in Photobioreactor by Continuous Process Using Concentrated Desalination: Effect of Dilution Rate on Biochemical Composition
2014; Hindawi Publishing Corporation; Volume: 2014; Linguagem: Inglês
10.1155/2014/310285
ISSN1687-8078
AutoresÂngelo Paggi Matos, Regina Coeli de Oliveira Torres, Luiz Rodrigo Ito Morioka, Elisa Helena Siegel Moecke, Kepler Borges França, Ernani Sebastião Sant’Anna,
Tópico(s)Solar-Powered Water Purification Methods
ResumoDesalination wastewater, which contains large amount of salt waste, might lead to severely environmental pollution. This study evaluated the effect of dilution rate ( 0.1 ≤ D ≤ 0.3 day −1 ) on microalgal biomass productivity, lipid content, and fatty acid profile under steady-state condition of Chlorella vulgaris supplemented with concentrated desalination. Continuous culture was conducted for 55 days. Results show that the biomass productivity ( P x ) varied from 57 to 126 mg L −1 d −1 (dry mass) when the dilution rate ranged from 0.1 to 0.3 day −1 . At lowest dilution rate ( D = 0.1 day −1 ), the continuous culture regime ensured the highest values of maximum biomass concentration ( X m = 570 ± 20 mL −1 ) and protein content (52%). Biomass lipid content was an increasing function of D . The most abundant fatty acids were the palmitic ( 25.3 ± 0.6 % ) at D = 0.1 day −1 and the gamma-linolenic acid ( 23.5 ± 0.1 % ) at D = 0.3 day −1 ones. These fatty acids present 14 to 18 carbons in the carbon chain, being mainly saturated and polyunsaturated, respectively. Overall, the results show that continuous culture is a powerful tool to investigate the cell growth kinetics and physiological behaviors of the algae growing on desalination wastewater.
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