Michele Grequede Morais, Jorge Alberto Vieira Costa and Cleber Klasener da Silva
Posters-Accepted Abstracts: J Material Sci Eng
The capacity of development, utilization and waste treatment by microalgae has stimulated the interest of researchers a few years.
Spirulina(Arthrospira) is a photosynthetic cyanobacterium that has high protein content is a source of vitamins and minerals.
The waste extract of polyhydroxybuturate (PHB) is not indicated to discard in environment because a diversity of compounds for
example chlorine and organic material. But these compounds are a good reserve of nutrients for cultivation of microorganisms. The
objective of this study was the utilization of the waste of poly-hydroxybutyrate extraction (PHB) in the cultivation of Spirulina sp.
LEB18. Cultivations were carried out in duplicate and 0, 2, 4, 6, 8, 10% (w/w) of residue was used. The residue was used above three
conditions: Heating at 121°C for 15 min and 0.111 MPa, chemical neutralization with sodium thiosulfate (Na2S2O3) and without
prior treatment. The cultures exhibit maximum cell concentrations untreated, heat treated and neutralized waste 0.96 (8% residue)
1.2 (6% residue) and 1.3 (2% residue) g L-1 respectively. The productivity values obtained for untreated, heat treatment and chemical
neutralization were 0.04, 0.08 and 0.09 g L-1 d-1. These results demonstrate the potential to use this residue to cultivation of Spirulina
sp. LEB 18 can reduce the cost of cultivation and minimize waste disposal into the environment.
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