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Influence of starch pretreatment on yield of cyclodextrins and performance of ultrafiltration membranes

A.M., Mimi Sakinah and A.F., Ismail and Hassan, Osman and A.W., Zularisam and Md. Illias, Rosli (2009) Influence of starch pretreatment on yield of cyclodextrins and performance of ultrafiltration membranes. Desalination, 238 (1-3). 317 -333. ISSN 0011-9164

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Official URL: http://dx.doi.org/10.1016/j.desal.2007.12.036

Abstract

The effect of starch pretreatment temperature and exposure time of raw tapioca starch on cyclodextrins (CDs) production and membrane performance using Thermoanaerobacter cyclodextrin glycosyltransferase (CGTase) were investigated in this study. Response surface methodology (RSM) was used to identify the optimum amount of CDs produced. Results indicated that the optimal exposure time and pretreatment temperature for optimum CDs production were 1 h and 70oC, respectively. Employment of this critical condition (70oC) as the starch pretreatment temperature, promoted high CDs production and better preservation on the starch granule structure and increased as such as 93% and 94% of swelling power and leached amylose, respectively. In the case of starch pretreatment temperature that is above the critical value (70oC), such application would apparently increase the solution viscosity and hydraulic resistance that subsequently decrease the membrane flux, despite increasing the CDs yield, suggesting that temperature is a crucial factor in determining the efficiency of CDs production, in particularly in the continuous system.

Item Type:Article
Uncontrolled Keywords:cyclodextrins, enzymatic membrane reactor, starch pretreatment, tapioca starch, ultrafiltration
Subjects:Q Science > QD Chemistry
Divisions:Science
ID Code:12888
Deposited By: Liza Porijo
Deposited On:06 Jul 2011 01:42
Last Modified:06 Jul 2011 01:42

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