Ultrasound-assisted production of bioethanol by simultaneous saccharification and fermentation of corn meal

Nikolic, Slobodan; Mojović, Ljiljana; Rakin, Marica; Pejin, Dušanka J.; Pejin, Jelena

doi:10.1016/j.foodchem.2010.02.063

Cited by 115 publications

(69 citation statements)

References 25 publications

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“…Microwaves affected granule degradation of corn meal after liquefaction even more than ultrasound. However, both pretreatments were very effective in enhancing the enzymatic hydrolysis in comparison with conventional heating [77,87]. The volume weighted mean particle size is inversely proportional to the applied sono-energy densities [86].…”

Section: Particle Sizementioning

confidence: 99%

“…Structural changes of starch granules pretreated after the liquefaction is started were more than that before liquefaction. However, ultrasound is more effective in decomposing starch in comparison with conventional heating [77,87]. Ultrasound during just 20 s pretreatment could partially rupture the starch granules.…”

Section: Morphologymentioning

confidence: 99%

“…Ultrasonic pretreatment can alter the structure of starches [11,77,87]. The destruction of starch structures might result in release of more individual starch granules to the aqueous phase, which enhances the enzymatic hydrolysis [78].…”

Section: Morphologymentioning

confidence: 99%

“…Both sonication time and power level need to be optimized in order to obtain the maximum glucose release. The effect of sonication temperature on hydrolysis of starches is significantly dependent on type, origin and chemical composition, as well as other process parameters employed [87]. For instance, the optimum sonication temperature was found to be in the range of 30-40 1C for hydrolysis of corn meal [62], while a temperature of 60 1C was considered as the optimum sonication temperature in pretreatment of Triticale [10a,87].…”

Section: Effect Of Ultrasound On Hydrolysismentioning

confidence: 99%

“…Therefore, applying ultrasound technology in starch pretreatment has the potential to significantly improve the ethanol yield and improve profitability. It seems that more investigation is needed to scale up system designs to large batch or continuous processes in order to fully realize the potential benefits of ultrasound pretreatment [87]. For instance, the power dissipation in the glass sonication chamber was 50-75% higher than that of the plastic centrifuge tube for starch treatment.…”

Section: Effect Of Ultrasound On Hydrolysismentioning

confidence: 99%

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Ultrasound irradiation in the production of ethanol from biomass

Karimi

Jenkins

Stroeve

2014

Renewable and Sustainable Energy Reviews

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a b s t r a c tEthanol produced from renewable biomass, such as lignocellulosic feedstock, is one of the alternative energy resources that can be environmentally friendly. However, physical and chemical barriers caused by the close association of the main components of lignocellulosic biomass, as well as starch, hinder the hydrolysis of cellulose and hemicellulose in lignocellulose as well as amylase and amylopectin in starch to fermentable sugars. One of the main goals of pretreatment for enzymatic hydrolysis is to increase the enzyme accessibility for improving digestibility of cellulose and starch. Ultrasound irradiation applied to cellulosic materials and starch-based feedstock was found to enhance the efficiency of hydrolysis and subsequently increase the sugar yield. Prior research conducted on applying ultrasonic technology for cellulose and starch pretreatment has considered a variety of effects on physical and chemical characteristics, hydrolysis efficiency and ethanol yield. This paper reviews the application of ultrasound irradiation to cellulose and starch prior to and during hydrolysis in terms of sugar and ethanol yields. It also addresses characteristics such as accessibility, crystallinity, degree of polymerization, morphological structure, swelling power, particle size and viscosity as influenced by ultrasonic treatment.

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Section: Particle Sizementioning

confidence: 99%

Section: Morphologymentioning

confidence: 99%