Lynne Wong's PhD thesis

Table 2.7. Predicted factory performance with increased extraneous matter
(EM) in cane.
Press Boiling house Overall CCS calculated from
EM added
extraction/% recovery/% recovery/% mixed juice
0% 96.5 91.0 87.8 14.89
Dry trash 5%
10%
20%
Green leaves 5%
10%
20%
Cane tops 5%
10%
20%
95.3
94.3
90.3
96.2
96.1
95.0
96.4
97.0
96.4
89.8
88.8
85.7
89.5
89.0
86.7
90.3
88.9
87.1
85.6
83.7
77.3
86.1
85.6
82.4
87.1
86.3
84.0
14.26
13.37
11.62
14.16
13.53
12.20
14.19
13.47
12.07
As the mixed juice was diluted 1.33 times by the imbibition water sprayed on the cake,
CCS values were calculated from the mixed juice data and then multiplied by a factor of
1.33 (Table 2.7).
The manner in which the parameters listed in Tables 2.2 – 2.7 were calculated are detailed
in Appendix 3.
2.1.5 Validity of the assumption made in the experimentation
This experiment provides an insight into the relative effect of measured quantities of dry
leaves, green leaves and tops added to clean cane of the same quality on cane processing
which is impossible to obtain under factory conditions. The mixed juiced-based TP, the
Mauritian TP and the ‘mixed juice’ quality leads to the quality and quantity of molasses,
which enables the prediction of values to the whole host of factory performance
parameters, which has never been done before.
The only one laboratory experiment carried out with known quantities of 2.5, 5.0 and 7.5%
each of dry leaves and green leaves added to clean cane was done by Hemaida et al.
(1977), who reported on the quality and quantity of the mixed juice and bagasse obtained,
and calculated the sugar yield and sugar losses in molasses by a formula simplified by
Herbert (1973).
Until there is a simple method of quantifying extraneous matter in cane and representative
sub-samples of all the cane supplied to factories are analysed, no industrial average of EM
in cane will be available. Tulip and Moore (2007) recently showed that using a technique
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