TABLE 4.
Physical–chemical characteristics of MTP and SSE effluents before and after treatment using Ca-alginate derivative containing A. fumigatus CAS21 tannase in the PBR.
| Parameters | Untreated MTP | Treated MTP | Untreated SSE | Treated SSE |
|---|---|---|---|---|
| Tannin (%) | 100 ± 5.5A | 21.9 ± 3.4B | 100 ± 3.0a | 25.72 ± 1.9b |
| Phenolic (mg of GAE/mL) | 0.6 ± 0.0A | 0.2 ± 0.0B | 0.6 ± 0.0a | 0.3 ± 0.0b |
| Color (A420nm) | 20.1 ± 0.2A | 10.3 ± 0.1B | 1.3 ± 0.1a | 0.5 ± 0.0b |
| Clarity (T660%) | 7.7 ± 0.4A | 50.9 ± 0.4B | 61.5 ± 0a | 80.2 ± 10.7b |
| pH | 7.2 | 7.8 | 3.8 | 4.0 |
Values with the same letter in line do not differ under Tukey’s test at 5% probability (p ≤ 0.05). MTP: manual tanning process; SSE: simplified synthetic effluent.