title: Spirulina platensis growth in open raceway ponds using fresh water supplemented with carbon, nitrogen and metal ions.
abstract: To investigate the feasibility of using fresh water from Mangueira Lagoon (Rio Grande do Sul, Brazil) for biomass production in open raceway ponds (0.7 m long, 0.18 m wide, 0.075 m deep) we studied the influence of nutrient addition (carbon as sodium bicarbonate, nitrogen as urea, phosphate, sulfate, ferric iron, magnesium and potassium) on the growth rate of the cyanobacteria Spirulina platensis using a 22 factorial design. In unsupplemented lagoon water production of S platensis was 0.78 +/- 0.01 g/l (dry weight basis) while the addition of 2.88 g/l of sodium bicarbonate (without added urea, phosphate, sulfate or metal ions) resulted in 0.82 +/- 0.01 g/l after 400 hours of culture. The further addition of phosphate and metal ions resulted in growth for up to 750 h and a final S. platensis biomass of 1.23 +/- 0.04 to 1.34 +/- 0.03 g/l.
authors.affiliation: Laboratório de Engenharia Bioquímica, Departamento de Química, Fundação Universidade Federal do Rio Grande, Caixa Postal 474, CEP 96201-900, Rio Grande, RS, Brasil. dqmjorge@furg.br
authors.forename: Jorge Alberto Vieira
authors.initials: JA
authors.lastname: Costa
authors.forename: Luciane Maria
authors.initials: LM
authors.lastname: Colla
authors.forename: Paulo
authors.initials: P
authors.lastname: Duarte Filho
mesh_terms: D001938:Brazil; D002244:Carbon; D003470:Culture Media; D000458:Cyanobacteria / Q000187:drug effects / Q000254:growth & development*; D005618:Fresh Water; D007477:Ions; D007700:Kinetics; D008670:Metals; D009584:Nitrogen; D017693:Sodium Bicarbonate / Q000494:pharmacology
chemical_list: D003470:Culture Media; D007477:Ions; D008670:Metals; D002244:Carbon; D017693:Sodium Bicarbonate; D009584:Nitrogen