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Content (mg mL-1) of individual phenolic acids identified in olive mill wastewaters (OMW) before the bio-oxidation process, and in the obtained OMWF amendment.
| Identified phenolic compound | OMW | OMWF |
|---|---|---|
| Gallic acid | 23.62 ± 2.35 | <LOD |
| Hydroxytyrosol acid | 373.22 ± 3.98 | <LOD |
| Hydroxybenzoic acid | 30.65 ± 3.24 | <LOD |
| Syringic acid | 22.60 ± 2.11 | <LOD |
| Ferulic acid | 2.73 ± 0.45 | 0.07 ± 0.01 |
| Verbascoside | 17.86 ± 1.10 | 1.48 ± 0.18 |
LOD, limit of detection.
