Statistical study of growth kinetics and lipid content of microalgae grown in brackish waters for bioenergetic purposes

Guimarães, Bruna da Silveira; França, Kepler Borges

doi:10.4136/ambi-agua.2649

Cited by 1 publication

(1 citation statement)

References 17 publications

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“…Similarly, Rai et al 47 obtained a maximum lipid production of 26.84% in Chlorella sp. at 500 mM NaCl, compared with 14% in the control culture, and Guimarães & França 48 reported a maximization of lipid accumulation in two microalgae, Nannochloropsis sp. and Pediastrum tetras , following an increase in salinity.…”

Section: Discussionmentioning

confidence: 96%

Influence of salinity, nitrogen and phosphorus concentrations on the physiological and biochemical characteristics of two Chlorophyceae isolated from Fez freshwater, Morocco

Assobhi,

Ennasry,

Latique

et al. 2024

Sci Rep

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Microalgae are widely exploited for numerous biotechnology applications, including biofuels. In this context, Chlamydomonas debaryana and Chlorococcum sp. were isolated from Fez freshwater (Morocco), and their growth and lipid and carbohydrate production were assessed at different concentrations of NaCl, NaNO3, and K2HPO4. The results indicate a small positive variation in growth parameters linked to nutrient enrichment, with no considerable variation in carbohydrate and lipid levels in both algae. Moreover, a negative variation was recorded at increased salinity and nutrient limitation, accompanied by lipid and carbohydrate accumulation. Chlorococcum sp. showed better adaptation to salt stress below 200 mM NaCl. Furthermore, its growth and biomass productivity were strongly reduced by nitrogen depletion, and its lipid production reached 47.64% DW at 3.52 mM NaNO3. As for Chlamydomonas debaryana, a substantial reduction in growth was induced by nutrient depletion, a maximal carbohydrate level was produced at less than 8.82 mM NaNO3 (40.59% DW). The effect of phosphorus was less significant. However, a concentration of 0.115 mM K2HPO4 increased lipid and carbohydrate content without compromising biomass productivity. The results suggest that growing the two Chlorophyceae under these conditions seems interesting for biofuel production, but the loss of biomass requires a more efficient strategy to maximize lipid and carbohydrate accumulation without loss of productivity.

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Section: Discussionmentioning

confidence: 96%