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Downstream Processing of the Hydrolysate from Cassava Fibrous Waste in the Production of Confectioner's Syrup
Author(s) -
Srikanta S.,
Jaleel S. A.,
Kunhi A. A. M.,
Rehana Fasiha,
Ghildyal N. P.,
Lonsane B. K.,
Karanth N. G.
Publication year - 1989
Publication title -
starch ‐ stärke
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.62
H-Index - 82
eISSN - 1521-379X
pISSN - 0038-9056
DOI - 10.1002/star.19890410510
Subject(s) - hydrolysate , starch , chemistry , downstream processing , hydrolysis , bentonite , activated carbon , pulp and paper industry , food science , chromatography , chemical engineering , organic chemistry , adsorption , engineering
The acid hydrolysis of starch present in cassava fibrous waste results in a formation of brownish yellow hydrolysate due to the use of higher acid concentration than that needed in case of pure starch. Thus, it dictates application of stronger downstream processing unit operations such as deproteinization, clarification and decolouration. Among the various deproteinizing agents evaluated, bentonite and kaolin were found to be the best and their use resulted in the removal of 20% protein and 60–70% red as well as yellow colours. Kaolin was selected based on economic considerations. The data indicated that 5% (w/v) kaolin, 10 min contact time at 25°C and a pH of 1.0–1.5 of the hydrolysate were suitable. For complete decolouration, 0.5% (w/v) activated carbon at 25°C with a contact time of 30 min was needed. Treatment with activated carbon also results in protein removal and is maximum at 40°C. These stronger down‐stream processing unit operations lead to an acceptable product conforming to the standard.