Fig. 5
From: Effects of light intensity on growth and lipid production in microalgae grown in wastewater
Nitrogen (a) and phosphorus (b) left in the municipal wastewater used as the growth medium after growth of the four microalgal strains for indicated times under indicated light intensities. Starting values for N is 34.5 mg L−1 and for P 2.8 mg L−1. Dotted lines represent maximum concentrations for release of the wastewater according to the European Directive for Urban Wastewater Treatment. Presented data are means ± standard deviations (n = 3 from two separate experiments)