Life Cycle Analysis on Fossil Energy Ratio of Algal Biodiesel: Effects of Nitrogen Deficiency and Oil Extraction Technology

Table 3

Net calorific values of algae and N fertilizer inputs.

Species of algae	Heat values and nitrogen contents	Normal N	Low N
Phaeodactylum tricornutum	Heat value (MJ/kg)	18.3	18.19
	N content (kg/kg)	0.052	0.040
Chlorella vulgaris	Heat value (MJ/kg)	18.33	23.27
	N content (kg/kg)	0.050	0.010