Research Article
Simultaneous Coproduction of Hydrogen and Ethanol in Anaerobic Packed-Bed Reactors
Table 1
Comparison of studies in packed-bed reactors for hydrogen production.
| Reference | Substrate/ concentration (g L−1)/ ORL (kgDQO·m−3·d−1) | Inoculum/pretreatment method | Support material | (cm s−1) | Temperature (°C) | pH | HRT (h) | HY (mol H2·mol−1 substrate) | HPR (L L−1 h−1) |
| Chang et al. [1] | Sucrose 17.8/85–854 | Municipal sewage sludge Acid | Expanded clay | — | 35.0 | 6.7 | 0.5–5.0 | 0.1–1.3* | 0.2–0.4 |
| Chang et al. [1] | Sucrose 17.8/213–854 | Municipal sewage sludge Acid | Activated carbon | — | 35.0 | 6.7 | 0.5–2.0 | 0.5–1.4* | 0.6–1.3 |
| Lee et al. [2] | Sucrose 17.8/106–854 | Municipal sewage sludge Acid | Activated carbon | — | 35.0 | 6.7 | 0.5–4.0 | 2.9–4.0* | 1.2–7.4 |
| Zhang et al. [3]a | Glucose 10.5/194 | Clostridium acetobutylicum | Glass beads | 0.005* | 30.0 | 4.9 | 1.3** | 0.9 | 0.2 |
| Wu et al. [4] | Sucrose 17.8/107 | Municipal sewage sludge Acid | Polyethylene-octane elastomer (POE) | — | 35.0 | 6.0 | 4.0 | 0.4 | 0.3* |
| Wu et al. [4] | Glucose 18.9/113 | Municipal sewage sludge Acid | Polyethylene-octane elastomer (POE) | — | 35.0 | 6.0 | 4.0 | 0.7 | 0.4* |
| Wu et al. [4] | Fructose 18.9/113 | Municipal sewage sludge Acid | Polyethylene-octane elastomer (POE) | — | 35.0 | 6.0 | 4.0 | 0.6 | 0.2* |
| Leite et al. [5] | Glucose 2/96 | Mixed culture Natural fermentation | Expanded clay | 0.024 | 30.0 | 3.9–7.3 | 0.5 | 1.8–2.5 | — |
| This study | Glucose 3.5/10–84 | Swine slaughterhouse sludge Heat-shock | Expanded clay | 0.3 | 25.0 | 4-5 | 1.0–8.0 | 1.2–2.2 | 0.2–0.9 |
| This study | Glucose 3.5/10–84 | Swine slaughterhouse sludge Heat-shock | Expanded clay | 0.6 | 25.0 | 4-5 | 1.0–8.0 | 1.2–2.4 | 0.1–0.9 |
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*Based on article data, aunsaturated flow reactor, and **HRT = reactor volume/influent flow rate.
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