TITLE:
Integration of physical and chemical treatment on the extraction of starch from Canna edulis Ker. rhizome
AUTHORS:
Judy R. B. Witono, Herry Santoso, Y. I. P. Arry Miryanti, Daniel Tan
KEYWORDS:
Canna edulis Ker.; Central Composite Design of Experiment; Hydraulic Press; Screw Press; Starch Extraction
JOURNAL NAME:
Agricultural Sciences,
Vol.4 No.9B,
November
6,
2013
ABSTRACT: The extraction ofCannaedulisKer. starch from its rhizome was performed using 2 different
types of press (hydraulic press and screw press) and with the addition of
Na-metabisulphite and NaOH (in the range of concentration 100 - 5000ppm each). The optimum condition for thisprocess was determined by Central Composite Design of experiment and the
statistical calculation was solved by Design-Expert7.0.0.
The targets of the observed responses were high starch yield, low ash, low
fiber, and high carbohydrate content. The results showed that the starch yield
and the reduction of fiber were only influenced by the physical treatment
whereas ash content in the product was influenced byboth the NaOH concentration and physical treatment. The
carbohydrate content in the extraction product was affected by NaOH, by the interaction
between the concentrations of NaOH and Na2S2O5 and also by the physical treatment. The hydraulic press gives much better
responses compared to the screw press.But in the selected
range of additives concentrations,the screw press gives a higher starch yield(30%-52%).