title: Retracted: Potential carbon dioxide fixation by industrially important microalgae.
abstract: The present study aimed at investigating the carbon metabolism in terms of carbon dioxide fixation and its destination in microalgae cultivations. To this purpose, analysis of growth parameters, media of cultivation, biomass composition and productivity and nutrients balance were performed. Four microalgae suitable for mass cultivation were evaluated: Dunaliella tertiolecta SAD-13.86, Chlorella vulgaris LEB-104, Spirulina platensis LEB-52 and Botryococcus braunii SAG-30.81. Global rates of carbon dioxide and oxygen were determinated by a system developed in our laboratory. B. braunii presented the highest CO(2) fixation rate, followed by S. platensis,D. tertiolecta and C. vulgaris (496.98, 318.61, 272.4 and 251.64 mg L(-1)day(-1), respectively). Carbon dioxide fixated was mainly used for microalgal biomass production. Nitrogen, phosphorus (calcium for D. tertiolecta), potassium and magnesium consumption rates (mg gX(-1)) were evaluated for the four microalgae. Biomass composition presented a predominance of proteins but also a high amount of lipids, especially in D. tertiolecta and B. braunii.
authors.affiliation: Bioprocess Engineering and Biotechnoloy Department, Federal University of Parana, Centro Politécnico, Usina Piloto B, CEP 81531-990 Curitiba, Paraná, Brazil.
authors.forename: Eduardo Bittencourt
authors.initials: EB
authors.lastname: Sydney
authors.forename: Wilerson
authors.initials: W
authors.lastname: Sturm
authors.forename: Julio Cesar
authors.initials: JC
authors.lastname: de Carvalho
authors.forename: Vanete
authors.initials: V
authors.lastname: Thomaz-Soccol
authors.forename: Christian
authors.initials: C
authors.lastname: Larroche
authors.forename: Ashok
authors.initials: A
authors.lastname: Pandey
authors.forename: Carlos Ricardo
authors.initials: CR
authors.lastname: Soccol
mesh_terms: D001673:Biodegradation, Environmental; D002245:Carbon Dioxide / Q000378:metabolism*; D056890:Eukaryota / Q000145:classification* / Q000378:metabolism*; D005240:Feasibility Studies; D013045:Species Specificity
chemical_list: D002245:Carbon Dioxide