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Carbohydrate Fiber from Orange Albedo
Author(s) -
BRADDOCK R. J.,
CRANDALL P. G.
Publication year - 1981
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1981.tb04936.x
Subject(s) - chemistry , cellulose , hemicellulose , orange (colour) , chromatography , pulp and paper industry , food science , organic chemistry , engineering
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.