Table 1. Proximate and ultimate analyses of the harvested biomass during mass cultivation.

	APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV
	O1	O3	O1	O3	O1	O3	O1	O3	O1	O3	O1	O3	O1	O3	O1	O3
Proximate analysis (wt %)
Moisture	7.4 ± 0.4	6.3 ± 0.0	8.3 ± 0.2	6.9 ± 0.4	6.3 ± 0.2	7.0 ± 0.1	5.9 ± 0.1	4.2 ± 0.3	5.0 ± 0.0	6.9 ± 0.0	5.2 ± 0.2	6.8 ± 0.2	8.3 ± 0.2	6.2 ± 0.2	7.1 ± 0.1	4.5 ± 0.1
Volatile matter	75.6 ± 0.6	73.6 ± 0.4	76.1 ± 0.2	71.5 ± 0.1	80.3 ± 0.3	76.8 ± 0.6	77.8 ± 0.3	78.5 ± 0.4	84.0 ± 0.1	80.3 ± 0.1	83.2 ± 0.1	81.2 ± 0.4	81.2 ± 0.0	80.8 ± 0.1	79.7 ± 0.1	76.7 ± 0.1
Ash	17.0 ± 0.2	20.1 ± 0.4	15.6 ± 0.4	21.7 ± 0.5	13.4 ± 0.6	16.3 ± 0.5	16.2 ± 0.2	17.3 ± 0.2	11.0 ± 0.1	12.8 ± 0.1	11.7 ± 0.3	12.0 ± 0.2	10.5 ± 0.2	12.9 ± 0.1	13.2 ± 0.3	18.8 ± 0.1
Ultimate analysis (wt %)
Carbon (C)	39.9 ± 0.4	38.6 ± 0.4	41.7 ± 0.0	39.1 ± 0.7	43.6 ± 0.2	40.8 ± 0.2	42.5 ± 0.1	41.8 ± 0.8	45.8 ± 0.6	45.7 ± 0.2	42.7 ± 0.2	43.0 ± 0.2	46.1 ± 0.0	45.1 ± 0.2	43.5 ± 0.2	37.9 ± 0.5
Hydrogen (H)	5.4 ± 0.1	5.4 ± 0.1	6.0 ± 0.0	5.3 ± 0.1	6.3 ± 0.1	5.7 ± 0.0	6.2 ± 0.0	5.9 ± 0.1	6.6 ± 0.1	6.4 ± 0.0	6.5 ± 0.0	6.5 ± 0.1	6.5 ± 0.1	6.4 ± 0.1	6.4 ± 0.1	5.3 ± 0.1
Nitrogen (N)	5.4 ± 0.1	5.8 ± 0.2	6.2 ± 0.1	5.5 ± 0.2	7.0 ± 0.0	5.4 ± 0.2	5.7 ± 0.1	5.8 ± 0.1	5.3 ± 0.1	6.9 ± 0.0	6.0 ± 0.0	6.0 ± 0.0	7.2 ± 0.1	5.6 ± 0.1	7.1 ± 0.0	4.0 ± 0.1
Sulfur (S)	0.4 ± 0.0	0.5 ± 0.0	0.4 ± 0.0	0.4 ± 0.0	0.5 ± 0.0	0.4 ± 0.0	0.4 ± 0.0	0.4 ± 0.0	0.5 ± 0.0	0.5 ± 0.0	0.4 ± 0.0	0.4 ± 0.0	0.6 ± 0.0	0.4 ± 0.0	0.5 ± 0.0	0.3 ± 0.0
Oxygen (O) (by difference)	31.8 ± 0.4	29.5 ± 0.2	30.2 ± 0.3	28.0 ± 1.5	29.3 ± 0.4	31.6 ± 0.1	28.9 ± 0.2	28.8 ± 1.1	30.9 ± 0.9	27.7 ± 0.0	32.8 ± 0.2	32.2 ± 0.2	29.2 ± 0.3	20.5 ± 0.2	29.4 ± 0.0	15.9 ± 0.4
HHV (MJ/kg)	17.0 ± 0.3	17.0 ± 0.2	18.6 ± 0.1	17.2 ± 0.6	19.8 ± 0.1	17.7 ± 0.1	19.5 ± 0.0	18.8 ± 0.6	20.8 ± 0.5	20.9 ± 0.1	19.4 ± 0.0	19.5 ± 0.3	21.0 ± 0.1	20.5 ± 0.2	20.0 ± 0.2	15.9 ± 0.4

Notes.

O1

Open pond raceway #1

O3

Open pond raceway #3