Fractional and physico-chemical characterization of hemicelluloses from ultrasonic irradiated sugarcane bagasse

Sun, Jifeng; Sun, Run‐Cang; Sun, Xiaofang; Su, Youlu

doi:10.1016/j.carres.2003.10.027

Cited by 125 publications

(71 citation statements)

References 28 publications

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“…These results suggest that the pre-washing treatment allows the removal of the BSG residual starch both by ultrasound and autoclave treatments. A first treatment with water and ultrasound was also reported as a refining step for the removal of contaminated starch and proteins [15] and to lower the amount of associated lignin to the xylans [19] before the alkaline extraction of xylans.…”

Section: Ultrasound Pre-washing Treatment With Watermentioning

confidence: 99%

“…The ultrasound pressure waves and resulting cavitation phenomena are able to break cell walls, promoting the release of the contents of the cell into the extraction medium [11,12]. UAE has already been used to obtain xylans from corn cobs [13,14], corn bran [15], wheat straw [16,17], buckwheat hulls [18], sugarcane bagasse [19], wheat bran [20] [21]. The advantages reported are the substantial shortening of extraction time, solvent consumption, and extraction temperature, resulting in higher yields and purity of polysaccharides with no significant structural changes and no negative effects in their functional properties.…”

mentioning

confidence: 99%

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Improved efficiency of brewer’s spent grain arabinoxylans by ultrasound-assisted extraction

Reis¹,

Coelho

Coimbra

et al. 2015

Ultrasonics Sonochemistry

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Section: Ultrasound Pre-washing Treatment With Watermentioning

confidence: 99%

mentioning

confidence: 99%

Improved efficiency of brewer’s spent grain arabinoxylans by ultrasound-assisted extraction

Reis¹,

Coelho

Coimbra

et al. 2015

Ultrasonics Sonochemistry

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“…In continuation of the ultrasound-assisted extraction of hemicellulose from sugarcane bagasse [40], three different multistep procedures (A, B, C) were compared for isolation of the cellulose component [50]. In the first step of procedure (A), water was used at 55°C for 2 h without or with sonication for the first 40 min followed by prolonged extraction for 80 min.…”

Section: Cellulosementioning

confidence: 99%

“…The extractability of bagasse was investigated [40] using a two-step extraction procedure in which the de-waxed bagasse was treated in water by ultrasound for 40 min at 55°C, followed by stirring for 80 min at the same temperature. Water-soluble hemicelluloses (WS 1 ) were isolated from the extract.…”

mentioning

confidence: 99%

An overview on the application of ultrasound in extraction, separation and purification of plant polysaccharides

Ebringerová

Hromàdková

2010

Open Chemistry

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Abstract:In view of the recent emphasis on non-conventional chemistry, application of ultrasound in isolation of plant polysaccharides represents a viable alternative to traditional extraction processes. This review presents an extensive literature survey of ultrasound-assisted extraction of polysaccharides from different plant materials, particularly herbal plants and secondary agricultural plant sources. Targeted, multistep methods were applied with respect to differences in the types of polysaccharides and their location in plant cell walls. The effectiveness of the methods was evaluated according to yield and properties of the isolated polysaccharides in comparison to classical extraction methods. Substantial shortening of extraction time, reduction of reagent consumption and/or extraction temperature are the most important advantages of the ultrasonic treatment. In combination with sequential extraction steps using different solvents, sonication was shown to be effective in separation and/or purification of polysaccharides. The disadvantages of the sonication treatment, such as degradation and compositional changes of the polysaccharide preparations are discussed as well. © Versita Sp. z o.o.

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“…Some of the sources readily available in Kentucky which have been researched include corn stover, wheat, and miscanthus. Other sources which have been investigated are shown in Table I, along with the estimated amount available and corresponding ethanol yield (Sun, et al, 2004;Chang et al, 2005). Corn stover includes the leaves and stalks of corn, so its use does not affect the price of corn to the food industry.…”

Section: Introductionmentioning

confidence: 99%

Hydrolysis of concentrated dilute base pretreated biomass slurries.

Brockmann

Gregory²

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Enzymatic hydrolysis is an important, but time limiting step in the process of converting biomass into ethanol. High solids concentrations are desired in order to minimize reactor size and achieve a higher concentration of glucose in the end product stream. However, higher solids concentrations lead to higher viscosities and hence, mixing and mass transfer becomes more difficult.In this study, a mixer designed to overcome the mass transfer limitations was used to conduct enzymatic hydrolysis of dilute-base pretreated corn stover, wheat, and miscanthus at high solids concentrations. This was done to determine if overcoming the mass transfer limitations would improve glucose release rates and yields, as was the case in a previous study on dilute acid pretreated corn stover. Solids concentrations were tested at 20%, 25%, and 30% for each substrate.The glucose yields during mixer trials were higher for lower solids concentrations for all three substrates, contradicting the previous results which showed that glucose release rates and yields were maintained as solids content increased in the mixer. The 20% solids corn stover released 70% more glucose than the 30% solids did. Yields for 20% solids were in the 60% range, which is low but close to the expected range. For wheat, 400% more glucose was released for 20% solids than 30% solids. Yields for 20% wheat solids were in the mid 60% range, which is also close to the expected range. For miscanthus, the increase was 36%. Yield for 20% miscanthus solids was below 40%, which was on the order of untreated sawdust in a previous study and indicates an ineffective pretreatment method for this substrate. The contradictory results indicate there v may be some effect other than mass transfer limitations that affects glucose release rates and yields.The slurries tested had much larger particle sizes and lacked the free water which gives the consistency seen with other pretreatment methods. This is most likely due to poor pretreatment. Due to the consistency, it was difficult to measure viscosity and, hence, determine if mass transfer limitations were overcome in these slurries.

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Fractional and physico-chemical characterization of hemicelluloses from ultrasonic irradiated sugarcane bagasse

Cited by 125 publications

References 28 publications

Improved efficiency of brewer’s spent grain arabinoxylans by ultrasound-assisted extraction

Improved efficiency of brewer’s spent grain arabinoxylans by ultrasound-assisted extraction

An overview on the application of ultrasound in extraction, separation and purification of plant polysaccharides

Hydrolysis of concentrated dilute base pretreated biomass slurries.

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