A novel saccharification method of starch using microwave irradiation with addition of activated carbon

Matsumoto, Akikazu; Tsubaki, Shuntaro; Sakamoto, Masahiro; Azuma, Jun-ichi

doi:10.1016/j.biortech.2010.12.013

Cited by 30 publications

(6 citation statements)

References 12 publications

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“…21–23. The process of microwave‐assisted starch hydrolysis has also been investigated 24, 25. Up to now there is no information on employing microwaves in starch oxidation processes.…”

Section: Introductionmentioning

confidence: 99%

Environmental friendly polysaccharide modification – microwave‐assisted oxidation of starch

Łukasiewicz¹,

Bednarz²,

Ptaszek³

2011

Starch Stärke

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A “green” method for oxidized starch preparation was presented. Hydrogen peroxide (H2O2) was used as the starch oxidant. Two main types of experiments were investigated: catalytic (by means of sodium tungstate – Na2WO4, the hydrogen peroxide activator) and non‐catalytic processes. The research covers low microwave level synthesis. Ninety and one hundred and ninety watts of microwave power were applied for the samples. All the microwave‐assisted reactions were compared to conventional ones carried out at 80 and 90°C, respectively. Reaction was monitored using manganometric determination of H2O2 consumption during the reaction progress. Obtained reaction products were tested by means of carbonyl and carboxyl group content. Additionally, molecular mass changes were investigated and a preliminary rheological study was done. The observed significant differences in the degree of oxidation (monitored by means of carboxyl and carbonyl group content) as well as the changes in molecular mass of polysaccharide comparing to those found at conventional conditions were showed and discussed.

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“…21–23. The process of microwave‐assisted starch hydrolysis has also been investigated 24, 25. Up to now there is no information on employing microwaves in starch oxidation processes.…”

Section: Introductionmentioning

confidence: 99%

Environmental friendly polysaccharide modification – microwave‐assisted oxidation of starch

Łukasiewicz¹,

Bednarz²,

Ptaszek³

2011

Starch Stärke

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“…Previously, Matsumoto et al (2011) and Khan et al (1979) reported that microwave treatment can be an alternative method for starch hydrolysis in water; Warrand and Janssen (2007) and Yu et al (1996) stated that starch in acid hydrolysis can produce oligosaccharide. Some researchers also reported the microwave-assisted hydrolysis can be applied to the mixture of starch and fiber from industrial waste such as cassava pulp (Hermiati et al 2011) and waste from the corn starch industry (Yoshida et al 2010).…”

Section: Effect Of Microwave-assisted Hydrolysis In Dilute Acidmentioning

confidence: 99%

Acid Modification of Sago Hampas for Industrial Purposes

2018

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Sago pith and sago hampas mainly consist of starch and fiber. In this research, acid modification of starch and fiber was conducted by high-temperature (autoclaving) and microwave-assisted treatments and slow or mild acid hydrolysis. Autoclaving and microwave-assisted treatments influenced the gelatinization and solubilization of starch granules to produce depolymerized starch and changed the fiber structure to become more amorphous forms. Heating in dilute acid produced high soluble total sugars with high dextrose equivalent, but the process also released hydroxymethylfurfural as undesired by-products. Slow or mild acid hydrolysis attacked the amorphous regions of starch and fiber. It did not change the starch and fiber crystallinity pattern but increased the degree of crystallinity. Acid modification techniques for sago starch and its fiber can be used for producing certain products such as starch sugar, fermentable sugars, and filler for biofoam production.

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“…Therefore, it was considered as energy efficient approach for biomass pretreatment under low pressure and temperature [14,15], and the microwave heating even improved the glucose selectivity [16]. Previously, it was reported that microwave treatment for saccharification in water and acid hydrolysis can produce oligosaccharides [17,18].…”

Section: Introductionmentioning

confidence: 99%

Two-steps microwave-assisted treatment on acid hydrolysis of sago pith for bioethanol production

Sunarti

Yanti

Ruriani

2017

IOP Conf. Ser.: Earth Environ. Sci.

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Abstract. Sago is a genus of palm that can be utilized to produce fermentable sugars as substrate for bioethanol. Sago pith is a heterogeneous substrate consists of starch and fiber. Acid hydrolysis by microwave heating radiation can break down starch and fibers together in a very short time, so it is considered to be very efficient process. The use of microwave energy (as power level) and variation of heating time can produce fermentable sugar with certain characteristics. This study included the preparation and analysis of sago pith flour; process of acid hydrolysis (0.3 M and 0.5 M H 2 SO 4 ) using two steps microwave heating, first with power level 30% (1, 2 and 3 min) and second with power level 70% (3 min); and ethanol production. The conventional treatment (autoclaving at 121C for 15 min) was carried for the comparison. The highest fermentable sugar (105.7 g/l) was resulted from microwave heating with power level 30% for 2 min followed by the power level 70% for 3 min. This hydrolyzate then used as substrate for bioethanol fermentation and partially neutralized (pH 3, 4, 5) by using yeast Issatchenkia orientalis, and the highest ethanol (2.8 g/l) was produced in pH 5.

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A novel saccharification method of starch using microwave irradiation with addition of activated carbon

Cited by 30 publications

References 12 publications

Environmental friendly polysaccharide modification – microwave‐assisted oxidation of starch

Environmental friendly polysaccharide modification – microwave‐assisted oxidation of starch

Acid Modification of Sago Hampas for Industrial Purposes

Two-steps microwave-assisted treatment on acid hydrolysis of sago pith for bioethanol production

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