Lynne Wong's PhD thesis

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Table 3.6. Masses of cane samples aged 44 weeks prior to and after fibre extraction. Mass of cane components prior to extraction/g Dry mass of cane components after extraction/g Cane source Additional material Sample Dry Green Top Stalk with rind Nodes Cane Rind Stalk Dry Top Dry Green Top Rind Stalk fibre Stalk pith leaf leaf only only leaf leaf leaf R 579 1 neg. (39) 1060 300 4040 1520 5560 920 3120 (33) 440 210 136.2 201.5 56.5 161.3 59.2 93.4 2 neg. (36) 760 220 3480 1280 4760 1020 2460 (67) 660 200 285.4 158.8 46.6 145.9 37.6 58.1 3 neg. (39) 820 250 6100 1830 7930 1260 4840 (61) 650 170 274.4 166.4 51.0 196.1 79.9 129.8 R 570 1 neg. (36) 860 300 5490 1350 6840 1400 4090 (37) 540 270 216.3 190.5 77.8 311.2 86.7 106.0 2 neg. (35) 790 280 3410 920 4330 930 2480 (29) 360 280 150.4 160.7 71.2 198.2 54.6 63.9 3 neg. (43) 1040 350 4560 1340 5900 1200 3360 (52) 700 230 243.9 224.8 70.1 282.7 74.2 88.7 M 1557/70 1 neg. (36) 780 260 4350 1220 5570 1370 2980 (33) 630 160 183.9 160.7 56.1 267.4 51.2 86.2 2 neg. (44) 900 250 3490 840 4330 920 2570 (40) 550 240 161.2 210.7 57.2 213.2 56.5 90.8 3 neg. (38) 880 200 3850 890 4740 1020 2830 (37) 480 190 187.8 167.0 47.2 188.5 46.7 69.8 M 1400/86 1 neg. (37) 890 350 4330 1430 5760 1260 3070 (43) 580 210 201.1 217.6 77.2 212.7 54.8 92.4 2 neg. (36) 720 320 4700 1430 6130 1190 3510 (52) 640 220 276.2 167.6 74.1 234.8 62.7 122.6 3 neg. (38) 790 300 4160 1080 5240 1030 3130 (29) 420 180 167.9 188.8 70.2 208.9 58.6 100.3 Note: Numbers in parentheses indicate the number of leaves. 91
Table 3.7. Masses of cane samples aged 36 weeks prior to and after fibre extraction. Mass of cane components prior to extraction/g Dry mass of cane components after extraction/g Cane source Additional material Sample Dry Green Top Stalk with rind Nodes Cane Rind Stalk Dry Top Dry Green Top Rind Stalk fibre Stalk pith leaf leaf only only leaf leaf leaf R 579 1 neg. (33) 480 140 2920 790 3710 1365 1555 (57) 380 200 218.5 111.7 32.9 111.7 41.4 52.9 2 neg. (33) 520 120 2920 860 3780 1250 1670 (27) 220 180 135.2 118.1 35.4 95.2 31.5 47.6 3 neg. (34) 750 150 2640 880 3520 700 1940 (23) 160 110 89.5 157.1 33.7 139.7 31.1 46.9 R 570 1 neg. (40) 960 210 2660 960 3620 850 1810 (28) 270 170 181.5 244.9 53.1 162.1 36.8 63.4 2 neg. (46) 1200 250 4800 1580 6380 525 4275 (44) 410 180 278.9 305.1 53.1 343.3 56.4 99.9 3 neg. (36) 870 250 4600 1300 5900 590 4010 (27) 290 180 185.5 206.8 55.8 308.8 44.2 85.8 M 1557/70 1 neg. (40) 770 280 2690 190 2880 804 1886 (26) 240 140 139.9 164.0 47.5 144.7 26.6 47.9 2 neg. (44) 880 200 3070 1080 4150 930 2140 (23) 200 170 115.7 187.4 40.5 207.7 28.5 63.8 3 neg. (39) 620 160 2480 840 3320 723 1757 (18) 140 160 87.8 148.0 40.5 143.2 20.6 43.8 M 1400/86 1 neg. (38) 790 200 3350 1340 4690 970 2380 (30) 300 180 209.2 219.1 57.0 158.5 30.0 62.4 2 neg. (41) 770 230 3860 1520 5380 1260 2600 (26) 220 190 135.6 172.7 58.8 231.5 36.1 88.3 3 neg. (40) 770 210 2810 1140 3950 635 2175 (46) 350 150 232.8 193.7 47.9 122.1 35.6 55.9 Note: Numbers in parentheses indicate the number of leaves. 92
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THE BRIX-FREE WATER CAPACITY AND SO
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dissolved and hydrated waters, and
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ACKNOWLEDGEMENTS I am particularly
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Page 1.5 THE DELETERIOUS EFFECTS OF
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Page 2.2 THE PHENOMENON OF BRIX-FRE
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Page 3.4.3.3 Cane tops 83 3.4.4 Cha
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4.3.3 Temperature at which Brix-fre
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4.6.1 Materials 143 4.6.1.1 Samples
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CHAPTER 6. PROPERTIES OF THE SORBED
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APPENDIX 3. CALCULATIONS LEADING TO
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LIST OF FIGURES Page Figure 1.1. Fi
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Figure 3.1. Glucose and fructose an
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Figure 5.11. Residual plots for the
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total adsorbed water (m) and the pr
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Table 2.18. Moisture content in sug
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Page Table 4.4. Results of the dete
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Page Table 4.24. Analysis of varian
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Page Table 5.13. Table 5.14. Equili
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Table 6.3. Heat of sorption of the
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GLOSSARY OF TERMS Absorption is the
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Filterability of a raw sugar is mea
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Sorption is the generic term used w
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LIST OF MAIN SYMBOLS Symbol Descrip
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s c s Slope of Caurie I isotherm pl
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number of 255, and cane land covere
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Nouvelle Mon In Trésor ustrie and
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Figure 1.3. Cane sampling by core s
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In Mauritius, most of the sugar fac
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are: cane tops, dry and green leave
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1.4 TRENDS IN CANE QUALITY RECEIVED
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campaign was launched to encourage
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The level of extraneous matter in c
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In Australia (Cargill, 1976), cane
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The effect of soil on factory perfo
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leaves increased the level of impur
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• From 1976 to 1980, when the pro
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Clerget purity of molasses 40 Clerg
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CHAPTER 2. IMPACT OF EXTRANEOUS MAT
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Since the extrapolated purity of mo
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Figure 2.1. Jeffco cutter grinder.
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2.1.4 Results The analytical result
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Table 2.3. Analytical results of re
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Table 2.5. Composition of dry trash
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Table 2.7. Predicted factory perfor
Page 89 and 90: Boiling house recovery 91.0 89.8 89
Page 91 and 92: 0 5 10 15 20 % EM in cane y = 0.572
Page 93 and 94: % EM in cane 0 5 10 15 20 0 -2 -4 -
Page 95 and 96: 1 y = 0.020 (% D) R 2 = 1.00 = 0.03
Page 97 and 98: % EM in cane 0 5 10 15 20 0 -2 y =
Page 99 and 100: esulting in 0.015 unit sucrose loss
Page 101 and 102: 2.2.1 Experimental procedure Cane m
Page 103 and 104: filter paper, rejecting the first f
Page 105 and 106: Table 2.9. Effect of increased addi
Page 107 and 108: Table 2.11. Effect of increased add
Page 109 and 110: Table 2.13. Effect of increased add
Page 111 and 112: various components such as stalk fi
Page 113 and 114: in the presence of dry leaves, if c
Page 115 and 116: Table 2.17. Moisture content in sug
Page 117 and 118: CHAPTER 3. SEPARATION OF THE SUGAR
Page 119 and 120: Table 3.1. It can be seen that the
Page 121 and 122: Table 3.2. Fibrous physical composi
Page 123 and 124: R 579 R 570 M 1557/70 M 1400/86 74
Page 125 and 126: loosen the fibre. The woody core is
Page 127 and 128: agitate the mixture in the pot, and
Page 129 and 130: Figure 3.7. Custom-built fibre-pith
Page 131 and 132: The extraction of fibres starting f
Page 133 and 134: pre-treatment in a Jeffco cutter-gr
Page 135 and 136: Figure 3.19. Stalk cake washed free
Page 137 and 138: not have many dry leaves attached t
Page 139: Table 3.5. Masses of cane samples a
Page 143 and 144: Table 3.9. Masses of cane component
Page 145 and 146: 3 57.6 126.3 23.7 97.2 31.1 53.8 11
Page 147 and 148: Table 3.12. Material loss (%) from
Page 149 and 150: 3.5.3 Fibre/pith ratios in cane com
Page 151 and 152: Table 3.15. Effect of extraneous ma
Page 153 and 154: Snow (1974) investigated the season
Page 155 and 156: from Figure 2.9 that the change in
Page 157 and 158: Table 3.18. Fibre % cane results by
Page 159 and 160: 110
Page 161 and 162: (a). Dry leaf (b). Green leaf (c).
Page 163 and 164: dry fibre, or a factor, is used in
Page 165 and 166: Steuerwald (1912) applied sucrose s
Page 167 and 168: solution/fibre ratio was lowered fr
Page 169 and 170: leave some residual moisture on the
Page 171 and 172: instead of 150 g of 10° Brix sucro
Page 173 and 174: Table 4.2. Determination of Brix-fr
Page 175 and 176: Table 4.3. Comparison of Brix-free
Page 177 and 178: Table 4.4. Results of the determina
Page 179 and 180: In order to test for homogeneity of
Page 181 and 182: Table 4.7. Results of the repeat de
Page 183 and 184: The experiment was repeated with th
Page 185 and 186: e any residual moisture in the samp
Page 187 and 188: By means of the same technique, Won
Page 189 and 190: was still hot. Since the filter was
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value determined could be corrected
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Qin and White’s finding was confi
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A sample size of 3.5 g with 75 g co
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Figure 4.4. Fibre samples drying in
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- One large fibre sample (rind) of
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Table 4.18. Brix-free water values/
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Table 4.20. Brix-free water values/
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4.7.3 Statistical analysis It is es
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Table 4.23. Analysis of variance (B
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pointing out that at 52 weeks old,
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The crop of R 570 sampled in 2001 w
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4.7.4. Estimated Brix-free water co
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The main difference in the two sets
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Table 4.27. Predicted Brix-free wat
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4.8 SUMMARY AND CONCLUSIONS An anal
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component parts, and verify the Bri
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3) Thermodynamic, water in equilibr
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Langmuir (1916, 1917, 1918) propose
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to determine the moisture sorption
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Table 5.1. Some commonly used isoth
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Lomauro et al. (1985) found that wi
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and on agricultural products such a
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Bruijn (1963) studied the mass incr
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After measuring the EMC of dry corn
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approached, that is, either by adso
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Table 5.4. Water activity (a w ) of
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5.6.3 Procedure to determine equili
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5.6.4 Results and discussion An exa
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Table 5.8. Equilibrium moisture con
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Table 5.10. Equilibrium moisture co
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Table 5.12. Equilibrium moisture co
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30 o C 45 o C 55 o C 60 o C Water w
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m/m of 96% activity, a w (g/100g dr
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vaporisation generally decreases fr
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30 o C isotherm 45 o C isotherm 55
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4 0 Stalk fibre 5 0 Stalk pith 5 0
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5.6.4.4 Fitting of sorption models
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Table 5.19. Parameters of the sorpt
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Page 271 and 272:
Page 273 and 274:
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Modified GAB Kuhn Iglesias - Chirif
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Table 5.28. Classification of resid
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Stalk fibre Stalk pith Rind fibre 4
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5.6.4.5 Calculated EMC values of re
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Table 5.30. Calculated equilibrium
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m/m of 96% Table 5.32. Calculated e
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Table 5.33. Parameters of the Hailw
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CHAPTER 6. PROPERTIES OF THE SORBED
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where m is the equilibrium moisture
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6.2 THE NUMBER OF ADSORBED MONOLAYE
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6.3 TOTAL SOLID SURFACE AREA AVAILA
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Thus, for each cane component of ea
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abscissa. For each moisture level (
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A similar procedure was followed to
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10 0 Stalk fibre Stalk pith Rind fi
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Moreover, if T β > T hm the proces
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Table 6.5. Characteristic parameter
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Binding energy/kJ (kg mol) -1 2 0 0
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6.8 CALCULATION OF BOUND WATER AND
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The values of K 1 , K 2 and W were
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Table 6.7. Separation of the total
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Table 6.7. (Contd.) Sample 30 o C 4
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3 0 S talk fibre 4 0 Stalk pith 3 0
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3 0 Reconstituted cane at 30 o C 3
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when water is added to dry wood, wh
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It is evident that in some cases ma
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The number of adsorbed monolayers,
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Data in Tables 2.9 and 2.11 show th
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particular fibre is systematically
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Anon. (1985b). Laboratory manual fo
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Blanchi R.H. and A.G. Keller (1952)
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Day D.L. and G.L. Nelson (1965). De
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Heyrovsky J. (1970). Determination
Page 347 and 348:
Kuhn I.J. (1964). A new theoretical
Page 349 and 350:
Madamba P.S., R.H. Driscoll and K.A
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Prinsen Geerligs, H.C. (1897). Stud
Page 353 and 354:
Sing K.S.W., D.H. Everett, R.A.W. H
Page 355 and 356:
Van der Pol C., C.M. Young and K. D
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Lynne Wong's PhD thesis

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