Microalgal TAG production strategies: why batch beats repeated-batch

Table 1 Comparison with literature

Species	TAG yield (g mol ⁻¹_ph )	Light intensity (μmol m⁻² s⁻¹)	Reference
Batch (nitrogen starvation phase)
C. zofingiensis	0.19	500	[16]
C. vulgaris	0.05	270	[21]
N. oculata	0.17	250	[22]
Nannochloropsis sp.	0.14	636^a	Benvenuti et al. (personal communication)
Nannochloropsis sp.	0.34	636	This study
N. oleoabundans	0.17	218	[23]
N. oleoabundans	0.03	270	[24]
S. obliquus	0.22	500	[25]
Starchless S. obliquus	0.37	500	[25]
Repeated-batch (constant cycle repetitions)
C. pyrenoidosa	0.12	175	[26]
Nannochloropsis sp.	0.07	636^a	Benvenuti et al. (personal communication)
Nannochloropsis sp.	0.13	636	This study (70N)
Nannochloropsis sp.	0.12	636	This study (140N)

Comparison of TAG yield on light obtained with various species for both lab-scale batch and repeated-batch cultivations in flat panel PBRs. The nitrogen starvation phase and the constant cycle repetitions are considered for batch and repeated-batch, respectively. 70N: 70 mg_N L⁻¹-rich medium repeated-batch cultivation; 140N: 140 mg_N L⁻¹-rich medium repeated-batch cultivation
^aAverage daily light intensity supplied as a day/night cycle

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