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Table 2 Characterization of CBW reported in the literature

From: Energetic and biochemical valorization of cork boiling wastewater by anaerobic digestion

Parameter Acero et al.[15] Benítez et al.[22] Bernardo et al.[6] Benítez et al.[7] Dias-Machado et al.[20] Vilar et al.[17] Mendonça et al.[21] Santos et al.[28]
pH 4.8 5.4 4.7 to 5.1 4.7 4.7 to 5.7 7.5 4.8 to 5.1 4.6 to 6.2
COD (kg m-3) 1.6 1.9 2.29 to 2.60 4.29 2.3 to 4.6 4.7 7.4 2.26 to 11.50
BOD5 (kg m-3) 0.75 1.15 0.875 to 0.90 1.75 0.49 to 0.74 0.75 1.3 0.5 to 3.5
TOC (kg m-3) - - 0.671 to 1.57 - 1.2 to 2.0 - - 1.2 to 2.0
TS (kg m-3) - - - - - - - 1.1 to 1.5
VS (kg m-3) - -   - - - - 0.85 to 1.0
TSS (kg m-3) 0.12 - - 0.28 - 0.124 - -
VSS (kg m-3) - - - - - 0.102 - -
Conductivity (mS cm-1) - - 0.934 to 0.935 - - 2.9 - 1.40 to 1.64
Total phenols (kg m-3) 0.305b 0.29b 0.36 to 0.41c - 0.66 to 0.78e 0.74f 1.3g (a)
Tannins (kg m-3) - - 0.25 to 0.27d 0.761 - - - -
Total nitrogen (kg m-3) - - - - - 0.31 - 0.06 to 0.2
Toxicity (UT) - - - - - - 3.4 to 12.3 -
  1. aPhenolic content as C6H5OH (0.2 to 0.6 kg m-3), phenolic content as caffeic acid (0.48 to 0.58 kg m-3), polyphenolic content as gallic acid (1.0 to 3.5 kg m-3) and tannins as tannic acid (0.85 to 1.70 kg m-3); btotal phenols as caffeic acid; ctotal phenols as tannic acid; dtannins as tannic acid; epolyphenol content; fpolyphenols as caffeic acid; glignin and tannin. BOD5, biological oxygen demand of 5 days; CBW, cork boiling wastewater; COD, chemical oxygen demand; TOC, total organic carbon; TS, total solids; TSS, total suspended solids; VS, volatile solids VSS, volatile suspended solids.