fulltext.study @t Gmail

Enhancement of starch-pulp separation in centrifugal-filtration process: Effects of particle size and variety of cassava root on free starch granule separation

Paper ID Volume ID Publish Year Pages File Format Full-Text
19019 43041 2015 10 PDF Available
Title
Enhancement of starch-pulp separation in centrifugal-filtration process: Effects of particle size and variety of cassava root on free starch granule separation
Abstract

•Bound starch granule remains in cassava pulp and is difficult to separate.•Free starch granule is not bound inside the pulp complex structure.•Centrifugation and filtration are main mechanisms for starch-pulp separation.•Semi-bound starch granule is released by centrifugal force acting on cassava pulp.•Pressure drop drives free starch granule from pulp during filtration process.

Cassava root and starch are used for human food consumption, animal feed and raw material for various industries, including the renewable energy industry. The composition and structure of cassava root depend on variety, age, environmental conditions and planting season. Starch granules following rasping step are divided into free and bound starch; the latter remains in the pulp and is difficult to separate, while the former is not bound inside the pulp complex structure. In a starch extractor, cassava starch granules are separated from pulp through the mechanisms of centrifugation and filtration. This research aimed to study the effects of particle size and variety of cassava root, centrifugation and filtration mechanisms on free starch granule separation efficiency. Three cassava root varieties, Rayong 9, Rayong 11 and Kasetsart 50, were classified by particle size after grinding and sieving. Experiments were conducted at various relative centrifugal forces (RCF: 0–487 × G) and pressure drops (2.5–12.0 kPa). The free starch separation efficiency increased with decreasing particle size of all cassava root varieties. The grinding of cassava root into small pieces caused cell wall breakage, facilitating free starch separation from the pulp. As the RCF increased, some bound starch granules were released due to the force acting on the cassava pulp. The pressure drop in filtration process drove the free starch granules to pass through the screen although this force was insufficient to separate the bound starch granules from the fiber.

Keywords
Bound starch granule; Centrifugation; Filtration; Free starch granule; Manihot esculenta; Semi bound starch
First Page Preview
Enhancement of starch-pulp separation in centrifugal-filtration process: Effects of particle size and variety of cassava root on free starch granule separation
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Food and Bioproducts Processing - Volume 95, July 2015, Pages 208–217
Authors
, , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us