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Updated: Feb 2, 2026

Analysis and Specification of Starch Granule Size Distributions
Published on: March 4, 2021
Production of reducing sugar from cassava starch waste (CSW) using solution plasma process (SPP)
Isarawut Prasertsung1, Korkiet Aroonraj2, Khanita Kamwilaisak3
1Chemical Engineering Program, Faculty of Engineering, Naresuan University, Phitsanulok 65000, Thailand; Research Center for Academic Excellence in Applied Physics, Faculty of Science, Naresuan University, Phitsanulok 65000, Thailand; Plasma Technology and Nuclear Fusion Research Unit, Chulalongkorn University, Bangkok 10330, Thailand.
Abstract:
The cassava starch processing plays an important role in food industries. During starch processing stage, a large amount of cassava starch waste (CSW) which mainly contains lost starch product and solid residue such as cassava bagasse are produced. Starch and cassava bagasse can be hydrolyzed into fermentable sugar such as glucose. In the present study, the solution plasma process (SPP) is used to treat CSW to prepare reducing sugar. The investigated parameters are treatment time, solvent concentration, applied pulsed frequency, and CSW concentration. The %yield of total reducing sugar (TRS) and glucose were calculated by DNS method and glucose assay kit, respectively. The chemical structure, morphology, and crystal structure of plasma-treated CSW were investigated. The results showed that the %yield of TRS was greatly enhanced by SPP treatment compared to that of acid hydrolysis. The CSW powder completely broke down into pieces after SPP treatment was applied. The amorphous and crystalline regions of CSW were destroyed during SPP treatment. SPP treatment of CSW with light sulfuric acid concentration of 0.08 M, applied pulsed frequency of 30 kHz, and CSW concentration of 0.5%w/v provided 99.0% TRS and 47.9% glucose.
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