Table 1 Results for chemical analysis of spent sulfite liquor samples (HPLC – high performance liquid chromatography; MgO – magnesium oxide; CaO – calcium oxide; SSL – spent sulphite liquor; HMF – hydroxyl-methyl-furfural; TPC – total polymeric compounds)

Furfural

g/l

0.29

0.01

0.23

0.01

HMF

mg/l

4.50

0.50

6.00

2.00

Formic Acid

g/l

0.81

0.08

2.21

0.04

Acetic Acid

g/l

4.26

0.35

9.02

0.15

Glucose

g/l

1.38

0.06

2.78

0.06

Xylose

g/l

18.25

1.16

27.68

0.45

Arabinose

g/l

0.86

0.07

1.18

0.01

Phenolics

mg/l

48.55

2.86

23.85

1.40

Solids

%

10.95

0.05

14.39%

0.10%

Ash

% of Solids

10.34

1.25

8.76%

0.00%

Elemental Composition

Carbon

%

5.78

0.25

8.41%

0.29

Hydrogen

%

10.32

0.36

9.46%

0.34

Nitrogen

%

0.59

0.16

0.23%

Maximum^a

Sulphur

%

1.45

0.13

2.64%

Maximum^a

Oxygen

%

81.86

Difference

81.18%

Difference

Calculated TPC

%

8.99%

13.70%