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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)