TABLE 5.
Comparison of CA6 with other hydrogen-producing organisms
| Organism | Reactor typea | Temp (°C) | Substrate | Substrate concn (g/liter) | Hydrogen yield (mol H2/mol glucose, hexose equivalent) | Hydrogen production rate (liter H2/liter culture/day) | Reference or source |
|---|---|---|---|---|---|---|---|
| Azotobacter vinelandii CA6 | CSTR | 30 | Sucrose | 10 | 0.06 | 0.03 | This study |
| CA6 plus tungsten | CSTR | 30 | Sucrose | 10 | 0.24 | 0.15 | This study |
| Escherichia coli WDHL | Batch | 37 | Glucose | 15 | 0.30 | 0.45 | 47 |
| Clostridium butyricum CWBI1009 | Batch | 30 | Glucose | 5 | 1.70 | 3.02 | 48 |
| Clostridium tyrobutyricum JM1 | CSTR | 37 | Glucose | 5 | 1.81 | 7.21 | 49 |
| Thermotoga neapolitana DSM 4359 | Batch | 80 | Glucose | 7.5 | 1.84 | 6.05 | 50 |
| Ethanoligenens harbinense YUAN-3 | CSTR | 35 | Glucose | 10 | 1.93 | 19.6 | 51 |
| Clostridium butyricum W5 | Batch | 37 | Glucose | 3 | 2.09 | 0.41 | 52 |
| Enterobacter aerogenes W23 plus Candida maltosa HY-35 | Batch | 35 | Glucose | 5 | 2.19 | 6.27 | 53 |
| Enterobacter aerogenes IAM 1183 | Batch | 37 | Galactose | 10 | 2.82 | 6.96 | 54 |
| Thermotoga neapolitana DSM 4359 | CSABR | 75 | Xylose | 5 | 3.36 | 2.66 | 55 |
| Thermotoga neapolitana DSM 4359 | Batch | 85 | Glucose | 2.5 | 3.75 | 0.54 | 56 |
a
CSTR, continuous stirred tank reactor; CSABR, continuously stirred anaerobic bioreactor.