Tanzania Sisal Industry: Auditing and Characterization of Sisal Post ...

Int. J. Pure Appl. Sci. Technol., 14(2) (2013), 84-94 89
Tables and Figures:
Table1: Weights of different size categories of sisal boles and leaf stubs.
Size
Core-Sisal bole
(kg)
(Mean±SD, n=3)
Sisal leaf
stubs
(kg)
Small 4±2.0 15±2 19
Medium 16±1.5 38±1 54
Large 34 ±1.0 84±2 118
X-Large 44 ±2.0 85±3 129
Total weight
(kg)
Table 2: Chemical characteristics of SBW fractions (Mean±SD, n=3)
Parameter Fresh Dry fraction Biomass residue after Leachate
fraction
leachate extraction
Total solids (TS 30.91±0.95 80.88±7.18 36.05±0.75 9.72±0.01
%)
VS (% TS) 98.17±0.52 93.27±1.43 94.19±0.60 93.51±1.50
Total carbon 54.4±0.55 52.69±0.16 54.81±0.32 54.24±0.27
(%TS)
Total Nitrogen 1.13±0.13 1.46±0.02 0.22±0.02 1.24±0.13
(%TS)
C:N ratio 48:1 36:1 285:1 44:1
Total organic 97.99±1 94.83±0.28 98.66±0.58 97.63±0.49
matter (%TS)
Total sugars 15.32±3.91 13.27±0.91 8.45±0.50 30.24±2.26
Crude fibers 51.43±1.06 40.35±1.06 81.17±2.34 1.1±0.13
(%TS)
NDF (%) ND 22.7±0.36 ND ND
ADF (%) ND 20.18±0.07 ND ND
Hemicellulose 20.14±1.89 10.14±0.89 8.14±0.22 6.41±0.26
(%TS)
Ash content 1.83±0.52 6.73±1.43 5.80±0.60 6.48±1.50
(%TS)
Calcium (%TS) 4.13±0.13 5.32±0.16 4.96±0.28 8.14±0.10
Magnesium (%TS) 0.20±0.02 0.62±0.12 0.12±0.01 2.10±0.11
Potassium (%TS) 1.18±0.09 1.34±0.23 0.79±0.31 1.24±0.16
Phosphorus (%TS) 0.11±0.01 0.25±0.05 0.10±0.01 1.42±0.21
Sulphate (%TS) 0.03±0.01 0.04±0.01 0.01±0.001 3.52±0.98
pH ND ND ND 5.77±0.07
Conductivity ND ND ND 3,970±2
(µS/cm)
TDS (ppm) ND ND ND 1,983±3
COD (g/l) ND ND ND 20.07±0.13