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The Production of Charcoal from Bagasse ROBERT F. McCAULEY Visiting Professor NATHAN C. BURBANK, JR., Professor REGINALD H. F. YOUNG, Assistant Professor School of Public Health University of Hawaii Honolulu, Hawaii PHYSICAL AND CHEMICAL CHARACTERISTICS OF BAGASSE Bagasse is a solid waste which results from the extraction of sugar from sugar cane. Sugar is present within the cane stalk as cane juice and extracted by passing the cane through heavy rollers and shredders to press the liquid fraction from the solid residue. As the fiber passes through each roller to the next, it is sprinkled with hot water to dilute the remaining juice and permit its extraction. Fibrous material discharged from sugar mills after sugar extraction is called bagasse. The bagasse is usually low in sugar, indicating high extraction efficiency. The composition of bagasse is not constant and is dependent upon both the cane and the method of extraction. Wet bagasse is usually 40 to 50 per cent water and 50 to 60 per cent solids. A typical analysis (1) of wet bagasse discharged from the mill shredders and rollers is shown in Table 1. TABLE I Wet Bagasse Discharged from Mill Rollers (2) Water 48.5 Per cent Fiber 46.5 Sugar 4.0 Ash 1.0 ANALYSIS OF BAGASSE Dry Fiber Cellulose.. 50-60 Per cent Pentosans 20-25 Lignin 10-18 Ash 15-30 Ultimate Analysis Dry Bagasse (3) Carbon . . . 43-47 Per cent Hydrogen 5.4-6.6 Oxygen 45-49 Ash 1.5-3.0 The moisture content of Hawaiian bagasse is somewhat less than 48 per cent because of good mill efficiency, averaging about 44 per cent. Bagasse is physically constituted of two fractions, pith and fiber. Pith often contains more than 25 per cent pentosans on a dry weight basis. The fibrous fraction is higher in cellulose and with fibers approximately the same length as hardwood. Bagasse fibers are higher in ash, hemicellulose and pentosans than wood. They have a lower lignin and alphacellulose content (2). In general, the chemical characteristics of bagasse are more similar to hard than to soft wood. Several potential commercial uses for bagasse require separation of the fiber and pith. The Rietz Disintegrator has been successfully used for wet depithing (2). When separated from pith, fiber has been used for the manufacture of paper, corru- -551.
Object Description
Purdue Identification Number | ETRIWC197057 |
Title | Production of charcoal from bagasse |
Author |
McCauley, Robert F. Burbank, N. C. (Nathan C.) Young, Reginald H. F. |
Date of Original | 1970 |
Conference Title | Proceedings of the 25th Industrial Waste Conference |
Conference Front Matter (copy and paste) | http://earchives.lib.purdue.edu/u?/engext,18196 |
Extent of Original | p. 551-558 |
Series | Engineering extension series no. 137 |
Collection Title | Engineering Technical Reports Collection, Purdue University |
Repository | Purdue University Libraries |
Rights Statement | Digital object copyright Purdue University. All rights reserved. |
Language | eng |
Type (DCMI) | text |
Format | JP2 |
Date Digitized | 2009-06-09 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Resolution | 300 ppi |
Color Depth | 8 bit |
Description
Title | page551 |
Collection Title | Engineering Technical Reports Collection, Purdue University |
Repository | Purdue University Libraries |
Rights Statement | Digital object copyright Purdue University. All rights reserved. |
Language | eng |
Type (DCMI) | text |
Format | JP2 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Transcript | The Production of Charcoal from Bagasse ROBERT F. McCAULEY Visiting Professor NATHAN C. BURBANK, JR., Professor REGINALD H. F. YOUNG, Assistant Professor School of Public Health University of Hawaii Honolulu, Hawaii PHYSICAL AND CHEMICAL CHARACTERISTICS OF BAGASSE Bagasse is a solid waste which results from the extraction of sugar from sugar cane. Sugar is present within the cane stalk as cane juice and extracted by passing the cane through heavy rollers and shredders to press the liquid fraction from the solid residue. As the fiber passes through each roller to the next, it is sprinkled with hot water to dilute the remaining juice and permit its extraction. Fibrous material discharged from sugar mills after sugar extraction is called bagasse. The bagasse is usually low in sugar, indicating high extraction efficiency. The composition of bagasse is not constant and is dependent upon both the cane and the method of extraction. Wet bagasse is usually 40 to 50 per cent water and 50 to 60 per cent solids. A typical analysis (1) of wet bagasse discharged from the mill shredders and rollers is shown in Table 1. TABLE I Wet Bagasse Discharged from Mill Rollers (2) Water 48.5 Per cent Fiber 46.5 Sugar 4.0 Ash 1.0 ANALYSIS OF BAGASSE Dry Fiber Cellulose.. 50-60 Per cent Pentosans 20-25 Lignin 10-18 Ash 15-30 Ultimate Analysis Dry Bagasse (3) Carbon . . . 43-47 Per cent Hydrogen 5.4-6.6 Oxygen 45-49 Ash 1.5-3.0 The moisture content of Hawaiian bagasse is somewhat less than 48 per cent because of good mill efficiency, averaging about 44 per cent. Bagasse is physically constituted of two fractions, pith and fiber. Pith often contains more than 25 per cent pentosans on a dry weight basis. The fibrous fraction is higher in cellulose and with fibers approximately the same length as hardwood. Bagasse fibers are higher in ash, hemicellulose and pentosans than wood. They have a lower lignin and alphacellulose content (2). In general, the chemical characteristics of bagasse are more similar to hard than to soft wood. Several potential commercial uses for bagasse require separation of the fiber and pith. The Rietz Disintegrator has been successfully used for wet depithing (2). When separated from pith, fiber has been used for the manufacture of paper, corru- -551. |
Resolution | 300 ppi |
Color Depth | 8 bit |
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