Physiological characteristics of the extreme thermophile Caldicellulosiruptor saccharolyticus: an efficient hydrogen cell factory

Table 1 Effect of growth temperature on H2 yield.

Organism	Opt T °C	Cultivation	Substrate	Maximum yield	Reference
Mesophiles
Escherichia coli SR15	37	Fed-batch	Glucose	1.82	[85]
Enterobacter aerogenes	40	Batch	Glucose	1.0	[99]
Enterobacter cloacae	37	Packed bed	Starch	1.4	[100]
Clostridium butyricum	30	continuous	Glucose	2	[101]
Clostridium acetobutilicum	34	Fed-batch	Glucose	2	[102]
Thermophiles
Clostridium thermocellum	60	Continuous		3.5	[103]
Extreme thermophiles
Thermotoga neopolitana	77	Batch	Glucose	3.9	[104]
Thermotoga elfii	65	Batch	Glucose	3.3	[15]
Caldicellulosiruptor saccharolyticus	70	Continuous	Glucose	3.6	[14]
Caldicellulosiruptor owensensis	70	Batch	Glucose	4	[66]
Thermoanaerobacter tengcongensis	75	Batch	Glucose	4	[45]
Thermoanaerobacter pseudoethanolicus	70	Continuous	Xylose	1.2	[105]
Hyper thermophiles
Thermotoga maritima	80	Batch	Glucose	4	[60]
Pyrococcus furiosus	100	Batch	Glucose	3.5	[57]
Thermococcales kodakaraensis	88	Continuous	Starch	3.3	[106]

A selection of mesophilic, thermophilic and extreme thermophilic H₂-producing strains, showing their optimal growth temperature and H₂ yields.

ISSN: 1475-2859