Direct and highly productive conversion of cyanobacteria Arthrospira platensis to ethanol with CaCl2 addition

Table 1 Ethanol production from cyanobacteria or green algae by microbial fermentation

Species	Hydrolysis procedure	Fermentation type	Ethanol titer (g L⁻¹)	Ethanol yield (g-ethanol (g-DCW)⁻¹)	Ethanol productivity (g L⁻¹ h⁻¹)	References
Green algae
Chlamydomonas reinhardtii	Acid	SHF	15	0.29	0.61	[13]
Chlorella sp.	Acid	SHF	23	0.29	0.60	[14]
Chlorella vulgaris	Acid	SHF	12	0.23	1.2	[5]
Scenedesmus obliquus	Acid	SHF	12	0.02	1.1	[11]
Scenedesmus acutus	Acid	SHF	23	0.20	1.5	[15]
C. reinhardtii	Enzymatic	SHF	12	0.24	0.3	[10]
C. vulgaris	Enzymatic	SSF	4.3	0.21	0.16	[5]
Cyanobacteria
Synechococcus sp.	Enzymatic	SHF	30	0.27	0.83	[12]
A. platensis	Enzymatic	SSF	6.0	0.32	0.60	[8]
A. platensis	Enzymatic	CBP	6.5	0.35	0.14	[8]
A. platensis	Enzymatic	CBP	48	0.32	1.0	This study

SHF separate hydrolysis and fermentation, SSF simultaneous saccharification and fermentation, CBP consolidated bioprocess, DCW dry-cell weight

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