9 research outputs found
Effect of three sources of nutrients on biomass and pigment production of freshwater microalgae Hyaloraphidium contortum
Multifunctionality of microalgae is becoming
increasingly important, hence science develops new
techniques to maximize their potential by providing
food, sustainable and affordable fuels and innovative
environmental solutions. In this study, we analyzed
the effect of different nutrient sources (Nitrofoska®,
Quimifol® and Guillard) and sowing time on the kinetics of
growth and pigment production of freshwater microalgae
Hyaloraphidium contortum; besides of registering some
physical and chemical variables in different growth
mediums. Bioassays were performed in batch cultures
by quadruplicate, continously maintaining and controlling
temperature, ventilation and lighting. Growth was
determined by cell count and production of pigments
by spectrophotometry. The largest population densities
and productivities per volume of culture were obtained
in F/2 Guillard (9.7±0.2x107 cel mL-1 and 7.6x108 cel/L/
day) and Nitrofoska® (8.7±0.5x107 cel mL-1 and 5.7x108
cel/L/day). The highest average chlorophyll a, chlorophyll
b and total carotenoid concentration was achieved with
foliar fertilizer Nitrofoska®, on days 18 and 24 (8, 3.29
and 2.2 μg mL-1, respectively), followed by the obtained
by Guillard and Quimifol®. We conclude that this microalgae can be grown with commercial agricultural
fertilizers as an alternative source of nutrients to produce
biomass and pigments with applications in biotechnology
and aquaculture industries