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Table 3 Characterization of influent and effluent in systems 1 and 2

From: Pretreatment of vinasse from the sugar refinery industry under non-sterile conditions by Trametes versicolor in a fluidized bed bioreactor and its effect when coupled to an UASB reactor

  System 1 System 2
Parameter Vinasse (diluted 7% v/v) UASB effluent Vinasse (diluted 10% v/v) Fluidized bed bioreactor effluent UASB effluent
COD 7,704 ± 800 4,000 ± 570a 11,000 ± 1,000 7,000 ± 93 3,940 ± 42a
Phenolic compounds 758 ± 100 840 ± 42a 1,083 ± 150 460 ± 40 519 ± 10b
Color* 0.10 ± .001 0.11 ± 0.003a 0.13 ± 0.012 0.13 ± 0.003 0.14 ± 0.005b
SO4 2- 371 ± 90 200 ± 56a 530 ± 141 540 ± 50 70 ± 40b
TN 120 ± 15 723 ± 52a 172 ± 21 688 ± 79 408 ± 91b
N-NH3 5 ± 0.6 57 ± 1a 7 ± 1 5 ± 0.7 31 ± 4b
PO4 3- 29 ± 5 49 ± 6a 41 ± 7 22 ± 2 46 ± 7a
Biogas production** - 2,370 ± 149a - - 1,102 ± 83b
Methane content*** - 65 ± 5a - - 74 ± 6b
  1. All values are expressed in mg/L, * Color is the absorbance at 475 nm, ** Biogas production at mL, *** Methane content at percentage. Each value is a mean ± SD. Different case letters indicate significant difference between means of UASB effluent in System 1 and System 2 for each parameter (One-way ANOVA, multiple range test, P < 0.05)