Carbohydrate Fiber from Orange Albedo
1981; Wiley; Volume: 46; Issue: 2 Linguagem: Inglês
10.1111/j.1365-2621.1981.tb04936.x
ISSN1750-3841
AutoresR. J. Braddock, Philip G. Crandall,
Tópico(s)Polysaccharides Composition and Applications
ResumoABSTRACT A process was developed for manufacturing dried orange albedo from fresh peel. Fresh albedo (nonpigmented portion) was recovered by shaving the flavedo (pigmented portion) from quartered peel after a commercial reamer juice extraction process. The albedo was then ground to reduce particle size, leached with water, treated with lime, pressed, and dried. Yield of dried (0% H 2 O) albedo was 3.3 kg/100 kg ‘Valencia’ oranges. Wastewater analyses of liquids discharged from the leaching process indicated average values of 14,400 mg COD and 9,850 mg BOD based on producing 1 kg of dry albedo. Several albedo carbohydrate fiber components were estimated by determining the monomers soluble in boiling water, 5% H 2 SO 4 and 72% H 2 SO 4 . These were as follows (g component/ l00g dry albedo): water‐soluble fraction‐hexose (11.2) and uronic acid (1.5), hemicellulose fraction‐pentose (11.9), pectin fraction‐uronic acid (12.9), and cellulose fraction‐hexose (10.8) and uronic acid (3.6), respectively. Lignin (6.7) was estimated by ashing the residue remaining after the 72% H 2 SO 4 extraction.
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