Pretreatment of lignocellulosic biomass using ultrasound aiming at obtaining fermentable sugar

Luzzi, Siane Camila; Artifon, Wagner; Piovesan, Bruna; Tozetto, Edenir; Mulinari, Jéssica; Kuhn, Graciele de Oliveira; Mazutti, Márcio A.; Priamo, Wagner Luiz; Mossi, Altemir José; Silva, Marceli Fernandes; Golunski, Simone Maria; Treichel, Helen; Bender, João Paulo

doi:10.1080/10242422.2017.1310206

Cited by 17 publications

(7 citation statements)

References 19 publications

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“…Another study on the ultrasound pretreatment on sugar beet shreds followed by enzymatic hydrolysis resulted in a yield of 780 mg/g cellulose, which was 3.7 times higher than that of achieved with untreated samples (Ivetić et al, 2017). Luzzi et al (2017) represented an interesting work on pretreatment of LCB where they performed the ultrasonication treatment and enzymatic hydrolysis in a single step. The activity of cellulase enzyme was examined in terms of temperature, Ph, and ultrasound power and found the maximum yield of 15.5 UPFml −1 at 40 • C, pH 4.6 and applied power of 44 W. The optimum conditions further showed effective sugar production on enzymatic hydrolysis of filter paper and bagasse malt.…”

Section: Ultrasonicationmentioning

confidence: 99%

Recent Trends in the Pretreatment of Lignocellulosic Biomass for Value-Added Products

et al. 2018

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Lignocellulosic biomass (LCB) is the most abundantly available bioresource amounting to about a global yield of up to 1. 3 billion tons per year. The hydrolysis of LCB results in the release of various reducing sugars which are highly valued in the production of biofuels such as bioethanol and biogas, various organic acids, phenols, and aldehydes. The majority of LCB is composed of biological polymers such as cellulose, hemicellulose, and lignin, which are strongly associated with each other by covalent and hydrogen bonds thus forming a highly recalcitrant structure. The presence of lignin renders the bio-polymeric structure highly resistant to solubilization thereby inhibiting the hydrolysis of cellulose and hemicellulose which presents a significant challenge for the isolation of the respective bio-polymeric components. This has led to extensive research in the development of various pretreatment techniques utilizing various physical, chemical, physicochemical, and biological approaches which are specifically tailored toward the source biomaterial and its application. The objective of this review is to discuss the various pretreatment strategies currently in use and provide an overview of their utilization for the isolation of high-value bio-polymeric components. The article further discusses the advantages and disadvantages of the various pretreatment methodologies as well as addresses the role of various key factors that are likely to have a significant impact on the pretreatment and digestibility of LCB.

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Section: Ultrasonicationmentioning

confidence: 99%

Recent Trends in the Pretreatment of Lignocellulosic Biomass for Value-Added Products

et al. 2018

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“…One possible reason for this could be due to all runs were performed with the same range of ultrasound power, since according to Luzzi et al. (2017) this parameter could promote a change in enzymes activities.…”

Section: Resultsmentioning

confidence: 99%

“…In a 100‐mL beaker, the amount of malt bagasse (solid fraction) and enzyme (liquid fraction), defined from experimental design, was weighted and then the sodium acetate buffer was added until 10 g as liquid fraction was obtained. After well‐sealed, the samples were thermally treated: one assay in the ultrasonic bath with 30% as ultrasonic power and another assay in the thermostatic bath (Luzzi et al., 2017). Temperature, pH, and exposure time were defined according to previous studies (Leaes et al., 2013; Wang et al., 2012), considering 50°C in pH 4.8 during 480 min (8 h).…”

Section: Methodsmentioning

confidence: 99%

Enzymatic hydrolysis behavior on malt bagasse for fermentative sugar disposal in thermostatic and ultrasonic bath

Artifon

Dalastra

Kubeneck

et al. 2020

Environmental Quality Mgmt

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This study evaluated the effect of enzymatic hydrolysis on malt bagasse for fermentative sugar extraction in thermostatic and ultrasonic bath. The enzymatic reaction was performed using cellulase, α-amylase, and amyloglucosidase (in separate and combined) on malt bagasse to analyze the hydrolysis effect. For this, a central composite rotational design was applied to evaluate the effect of solid:liquid (malt bagasse w/v) versus enzymatic concentration, considering cellulase, α-amylase, and amyloglucosidase enzymes in mix solution, on fermentable sugars liberation. Then the kinetic fermentative sugars liberation was evaluated in a hydrolysis reaction using cellulase, α-amylase, and amyloglucosidase (in separate and combined) after exposure in thermostatic and ultrasonic bath. From enzymatic mix, the maximum total reducing sugar (TRS) yield was 408.8 and 219.9 mg⋅g −1 in thermostatic and in ultrasound bath, respectively. Kinetic studies showed a TRS variation of 6 to 7 g⋅L −1 for all enzymes. Amyloglucosidase was more promising in assimilation of malt bagasse, responsible for 43% of sugar releasing. Briefly, a low-cost procedure using thermostatic bath improved the hydrolysis reaction. The results from the experiments present a new application where malt bagasse can be employed showing the potential of this brewing industry residue in fomenting processes, as bioethanol production.

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“…The different pretreatments include conventional methods, such as acid and alkaline hydrolysis under mechanical agitation (AG), steam explosion or oxidative treatments, and emerging techniques, such as microwaves, ozone, irradiation by gamma rays, supercritical CO2 or ultrasound application [10][11][12]. In this sense, the use of high-intensity ultrasound (US), characterized by operating at acoustic intensity higher than 1 W•cm -2 in the frequency range of 10-100 kHz, has shown itself to be an efficient tool for intensifying the treatment of biomass in combination with conventional processes [13][14][15][16]. Moreover, the application of US in an alternative primary pretreatment could enhance the sugar release using milder conditions in terms of temperature, type of acid or acid concentration [17].…”

Section: Introductionmentioning

confidence: 99%

Influence of high-intensity ultrasound application on the kinetics of sugar release from acid suspensions of artichoke (Cynara scolymus) biomass

Polachini

Mulet

Telis‐Romero

et al. 2019

Chemical Engineering and Processing - Process Intensification

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The study of sugar release kinetics is an essential step prior to developing new technologies for applying in the bioethanol industry. To this end, the kinetics of reducing and total sugar release (extraction/hydrolysis) from artichoke waste were obtained in different conditions to evaluate the solubility of free sugars from raw matter and the hydrolysis of larger chain molecules separately. Thus, experiments of extraction with water (WE), hydrolysis (HY) in acid solutions and a conventional industrial hydrolysis (IHY), which combines dissolution and hydrolysis effects, were carried out. All of the treatments were studied with ultrasound application (US) or with conventional agitation (AG). Compared to AG experiments, US application accelerated the sugar dissolution reducing 50% the time to reach the equilibrium. The decrease in the biomass concentration in the suspensions increased the US effects in HY experiments. In IHY experiments, US was also able to enhance the final yield of sugars achieving relative reducing sugar and total sugar amounts 213% and 175%, significantly higher than AG experiments. The rheological changes in the suspensions during treatments can explain the different magnitude of ultrasound effects. The acoustic field characterization and the measurement of viscosity in the acid suspensions agreed with these results.

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Pretreatment of lignocellulosic biomass using ultrasound aiming at obtaining fermentable sugar

Cited by 17 publications

References 19 publications

Recent Trends in the Pretreatment of Lignocellulosic Biomass for Value-Added Products

Recent Trends in the Pretreatment of Lignocellulosic Biomass for Value-Added Products

Enzymatic hydrolysis behavior on malt bagasse for fermentative sugar disposal in thermostatic and ultrasonic bath

Influence of high-intensity ultrasound application on the kinetics of sugar release from acid suspensions of artichoke (Cynara scolymus) biomass

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