Table 1.
Comparison of hydrogen production found in different studies by using wastes as the substrate.
| S. no | Microbes | Wastes | Yield | References |
|---|---|---|---|---|
| 1 | Thermoanaerobacterium, Caloribacterium, and Caldanaerobius Species (thermophilic consortium) | Human waste stimulants, Wastewater, and Activated sludge | 4 mmol H2/g (from human waste), 5.7 mmol H2/g (from waste water), and 2.2 mmol H2/g (from activated sludge) | 42 |
| 2 | Rhodobacter capsulatus JP91 | Glucose | 7.8 mol H2/mol glucose | 45 |
| 3 | Mixed culture | Sugar beet | 198 mL H2 g−1 TOC | 47 |
| 4 | Klebsiella peneumoniae (Inoculum produced by isolating microorganism from aviary litter). | Brewery waste water | 0.80–1.67 mol H2/mol glucose | 48 |
| 5 | Thermotoga maritima DSM 3109 | Fruit and vegetable wastes | 3.46 mol H2/mol | 49 |
| 6 | R. capsulatus DSM 1710, R. capsulatus YO3, R. sphaeroides O.U.001 and Rp. palustris DSM 127 | Sugar beet molasses | 12.7 ± 0.7 mol H2/mol sucrose 10.6 ± 0.4 mol H2/mol sucrose 9.4 ± 0.5 mol H2/mol sucrose and 19.0 ± 0.5 mol H2/mol sucrose respectively | 50 |
| 7 | Seed sludge | Dairy cow solid waste | 500 mL H2/g total sugar | 40 |
| 8 | Enterobacter aerogenes | Rice straw | 19.7 mL H2/g dry rice straw | 51 |
| 9 | Granule sludge | Vinasse | 14.8 mL H2/g VS substrate | 52 |
| 10 | Bacillus licheniformis AP1 | Kitchen waste | 17.6 mmol H2/g COD | 53 |
| 11 | Lactobacillus acidophilus | Cheese waste | 1 mol of H2 produced/mol of the hexose | This study |