Effect of three sources of nutrients on biomass and pigment production of freshwater microalgae Hyaloraphidium contortum
2016
Caña, E. | Guevara, M. | Subero, J. | Colivet, J. | Brito, D.J.
Multifunctionality of microalgae is becomingincreasingly important, hence science develops newtechniques to maximize their potential by providingfood, sustainable and affordable fuels and innovativeenvironmental solutions. In this study, we analyzedthe effect of different nutrient sources (Nitrofoska®,Quimifol® and Guillard) and sowing time on the kinetics ofgrowth and pigment production of freshwater microalgaeHyaloraphidium contortum; besides of registering somephysical and chemical variables in different growthmediums. Bioassays were performed in batch culturesby quadruplicate, continously maintaining and controllingtemperature, ventilation and lighting. Growth wasdetermined by cell count and production of pigmentsby spectrophotometry. The largest population densitiesand productivities per volume of culture were obtainedin 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 5.7x108cel/L/day). The highest average chlorophyll a, chlorophyllb and total carotenoid concentration was achieved withfoliar fertilizer Nitrofoska®, on days 18 and 24 (8, 3.29and 2.2 μg mL-1, respectively), followed by the obtainedby Guillard and Quimifol®. We conclude that this microalgae can be grown with commercial agriculturalfertilizers as an alternative source of nutrients to producebiomass and pigments with applications in biotechnologyand aquaculture industries.
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