Resumo (PT):
Abstract (EN):
This work analyses the influence of macro and micronutrients on the growth, biomass and lipid
productivities of Dunaliella tertiolecta (D. tertiolecta), showing that with the exception of Nitrogen (N) and
Iron (Fe), the other nutrients added to the culture medium - Magnesium (Mg), Potassium (K), Manganese
(Mn) and Zinc (Zn) - did not influence the studied parameters. The best maximum and average dry
biomass productivities were respectively 141.8 mg/L/d and 63.1 mg/L/d, obtained in the 5th day of the test,
by increasing the N concentration 10 times in comparison to the standard culture medium “artificial
seawater medium with vitamins”. In these conditions, the lipid content and maximum lipid productivity were
respectively 33.5 % and 47.4 mg/L/d, corresponding to more than three times the value in the standard
conditions (13.3 mg/L/d). Also, by increasing the Fe concentration 10 times in the culture medium, the
maximum lipid productivity increased to almost the double, i.e. from 14.6 mg/L/d to 28.0 mg/L/d, obtained
in the 28th day of the test. Therefore, N and Fe addition to the culture medium resulted in a significant
increase in lipid productivity, suggesting that residual wastewaters rich in N or Fe could be used to
cultivate D. tertiolecta for lipid production.
Idioma:
Inglês
Tipo (Avaliação Docente):
Científica
Nº de páginas:
6