Table 1 Effect of operational parameters on reactor performance
From: Tequila vinasses acidogenesis in a UASB reactor with Clostridium predominance
HRT (h) | VGPRa (Lgas L −1reactor d−1) | PHa | COD removal (%)a | Aciditya (mg CaCO3 L−1) | Alkalinitya (mg CaCO3 L−1) |
|---|---|---|---|---|---|
6 | 1.09 ± 0.16 (25) | 6.48 ± 0.06 (25) | 36.04 ± 4.00 (12) | 3,994.81 ± 183.29 (25) | 282.54 ± 17.73 (25) |
12 | 1.16 ± 0.12 (40) | 6.57 ± 0.04 (40) | 44.66 ± 2.72 (24) | 4,120.14 ± 133.82 (40) | 323.58 ± 12.94 (40) |
24 | 1.62 ± 0.22 (16) | 6.61 ± 0.07 (16) | 54.26 ± 5.08 (10) | 4,331.12 ± 242.05 (16) | 337.73 ± 23.41 (16) |
36 | 1.49 ± 0.23 (10) | 6.72 ± 0.08 (9) | 63.47 ± 5.64 (10) | 3,615.65 ± 265.74 (9) | 351.31 ± 25.71 (9) |
OLR (g COD L−1d−1) | |||||
5 | 0.91 ± 0.09 (55) | 6.81 ± 0.03 (56) | 55.05 ± 2.21 (30) | 3,141.45 ± 103.10 (55) | 293.92 ± 9.98 (55) |
10 | 1.02 ± 0.28 (6) | 6.85 ± 0.10 (5) | 61.15 ± 6.19 (4) | 3,135.29 ± 335.92 (5) | 312.21 ± 32.49 (5) |
15 | 0.90 ± 0.28 (9) | 6.31 ± 0.09 (8) | 31.86 ± 6.32 (6) | 4,770.97 ± 311.63 (9) | 331.12 ± 30.15 (9) |
20 | 1.69 ± 0.18 (15) | 6.71 ± 0.06 (15) | 60.55 ± 4.47 (8) | 3,592.49 ± 207.14 (15) | 331.50 ± 20.04 (15) |
30 | 2.18 ± 0.28 (6) | 6.29 ± 0.10 (6) | 39.43 ± 6.95 (3) | 5,436.95 ± 311.53 (6) | 350.21 ± 30.14 (6) |