Semi-quantitative determination of ash element content for freeze-dried, defatted, sulfated and pyrolysed biomass of Scenedesmus sp.

Table 5 Oxide content in the biomass ashes of Scenedesmus sp.

Elements (% by mass)	Freeze-dried		Defatted		Pyrolyzed		Sulfated
Elements (% by mass)	Mean	SD	Mean	SD	Mean	SD	Mean	SD
MgO	10.21^a	0.57	14.03^b	0.58	11.77^a	0.42	14.03^b	2.91
P₂O₅	47.76^a	0.73	44.14^b	0.99	47.52^a	1.01	19.65^c	3.26
SO₃	ni		ni		ni		28.75	4.40
K₂O	9.16^a	0.22	8.55^b	0.22	9.10^a	0.23	3.29^c	0.75
CaO	12.10^a	0.35	10.82^b	0.24	11.07^b	0.39	4.37^c	0.80
Fe₂O₃	14.16^a	0.91	14.56^a,b	0.33	13.51^a,b	0.86	19.96^c	4.40
CoO	2.14^a	0.39	2.46^a	0.58	1.95^a	0.38	3.19^a	2.00
Br	2.14^a	0.09	3.21^a	0.55	2.33^a	0.47	4.69^a	3.95

ISSN: 2731-3654