Fig. 3From: Cultivation of lipid-producing microalgae in struvite-precipitated liquid digestate for biodiesel productionScanning electron microscopy with energy dispersive analysis (a) and X-ray diffraction patterns (b) of struvite from liquid digestate (NH4+:Mg2+:PO43− molar ratios at 1:1.2:1.2, the stirring was stopped as soon as the pH reached to 8.5)Back to article page