Enhancement of biohydrogen production rate in Rhodospirillum rubrum by a dynamic CO-feeding strategy using dark fermentation

Table 5 Comparative hydrogen production rate (\(R_{{{\text{H}}_{2} }}\)) in PNSB under photosynthetic or dark fermentation conditions

Strain	Operation	Metabolic pathway	Carbon sources	\(R_{{{\text{H}}_{2} }}\) mmol l⁻¹ h⁻¹	References
Rhodopseudomonas palustris	Batch	Photofermentation	Malate + glutamate	0.3	[43]
Rhodopseudomonas palustris	Batch	Photofermentation	Lactate	2.2	[44]
Rhodobacter sphaeroides	Batch	Photofermentation	Acetate	0.9	[36]
	Batch	Photofermentation	Acetate + butyrate + glutamate	2.1	[45]
	Batch	Photofermentation	Acetate + butyrate + glutamate	6.1	[46]
Rhodobacter capsulatus	Batch	Photofermentation	Glucose	32	[47]
	Batch	Photofermentation	Acetate	0.3	[48]
	Batch	Photofermentation	Acetate + butyrate	0.2	[49]
	Batch	Photofermentation	Acetate + glutamate	1	[50]
Rhodospirillum rubrum	Batch (light)	Syngas fermentation	Acetate + syngas	0.2	[13]
	Continuous (light)	Syngas fermentation	Acetate + syngas	32	[22]
	Fed-batch (dark)	Syngas fermentation	Acetate + syngas	11	[15]
	Fed-batch (dark)	Syngas fermentation	Acetate + syngas	27	This work
	Continuous	Photofermentation	Lactate + glutamate	1	[51]

ISSN: 2731-3654