Table 4 Crude glycerol anaerobic digestion
From: Conversion of residues and by-products from the biodiesel industry into value-added products
Co-substrate | Glycerol concentration (%) | pH/temperature/ °C | Retention time (days) | Methane yield | References |
|---|---|---|---|---|---|
Sewage sludge | 1 (v/v) | 5/35 | 33 | 2353 mL/day | (Fountoulakis et al. 2010) |
Sewage sludge | 3 | 7/37 | 12.3 | 0.8 L/g TVS | (Athanasoulia et al. 2014) |
Sewage sludge | 0.63 (v/v) | 7/35.0 | 20 | 1.3 m3/L crude glycerol | (Nghiem et al. 2014) |
Wastewaters | 47 | 6.88/35.0 | 30 | 2.17 g/L/day | (Watanabe et al. 2013) |
– | 80 | 7.6–8.9/37 | 1 | 0.9 L/mL | (Hutňan et al. 2013) |
Orange peel waste | 7.19/35 | 8.5–30.0 | 330 mL/g VS | (Martín et al. 2013) | |
Pig manure | 3 | 55 | 15 | 0.47 L/g−1 VS | (Astals et al. 2013) |
Pig manure and fish waste | 8 | 7.0–7.2/35 | 15.6 | 16.4 L/kg COD/day | (Álvarez et al. 2010) |