Struvite as alternative nutrient source for cultivation of microalgae Chlorella vulgaris

• Struvite was used for cultivation of microalgae (Chlorella vulgaris).
• C. vulgaris cells could grow well with most of the tested recipes.
• The lipids (C15–C18) contents for cultivated microalgae ranged 1.01–3.98 g/L.
• Struvite is an affordable nutrient source for the growth of C. vulgaris.

Cultivating microalgae for derived biofuels acquires high nutrient costs. The use of struvite as an alternative nutrient for cultivation of microalgae (Chlorella vulgaris) was tested. Recipes were designed and adopted to supplement the struvite, using Bold's Basal Media (BBM) as a reference nutrient source and enriched CO2 gas (10% v/v) or air as gas source. The C. vulgaris cells could grow well with most of the tested recipes. The lipids (C15–C18) contents for cultivated microalgae ranged 1.01–3.98 g/L. Struvite, a cheaper nutrient source than BBM, has been experimentally confirmed a feasible nutrient source for the growth of C. vulgaris.

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