Table 1.
Characteristics of raw, pre-treated (at pH 2.0 with 5.0 g activated carbon /100 ml raw vinasse) vinasse and spent medium after bioprocessing
| Parameter | Raw vinasse |
After pre-treatment |
After bioprocessing |
||
|---|---|---|---|---|---|
| 25% pre-treated | 50% pre-treated | 25% pre-treated | 50% pre-treated | ||
| pH |
3.5 ± 0.5 |
4.0 ± 0.5 |
4.0 ± 0.5 |
8.2 ± 0.5 |
8.1 ± 0.5 |
| BOD5 (mg/l) |
78170 ± 120 |
8467 ± 35 |
15275 ± 38 |
1800 ± 27 |
2250 ± 45 |
| COD (mg/l) |
90837 ± 45 |
13950 ± 84 |
23134 ± 62 |
2690 ± 17 |
3850 ± 27 |
| Salinity (mS/cm) |
28.5 ± 0.4 |
7.2 ± 0.2 |
13.5 ± 0.5 |
415 ± 11 |
445 ± 20 |
| Total organic carbon (mg/l) |
16540 ± 35 |
2764 ± 35 |
6860 ± 54 |
305 ± 29 |
359 ± 43 |
| Total carbohydrate (mg/l) |
112581 ± 125 |
22637 ± 87 |
32935 ± 71 |
409.5 ± 25.5 |
604.5 ± 55 |
| Total Kjeldahl nitrogen (mg/l) |
471 ± 15 |
97 ± 18 |
175.5 ± 22 |
14 ± 1.5 |
17 ± 2 |
| Phosphate (mg/l) |
2875 ± 10 |
468 ± 31 |
938 ± 91 |
154 ± 12 |
195 ± 9 |
| Total polyphenolic compounds (mg/l) | 667 ± 10 | 21 ± 0.5 | 48 ± 1.5 | 16 ± 2 | 39 ± 5 |
The mean values of three determinations in duplicate sets are reported.