Increased release of fermentable sugars from elephant grass by enzymatic hydrolysis in the presence of surfactants

Menegol, Daiane; Scholl, A.; Fontana, Roselei Claudete; Dillon, Aldo José Pinheiro; Camassola, Marli

doi:10.1016/j.enconman.2014.02.071

Cited by 67 publications

(30 citation statements)

References 35 publications

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“…According to Archana & Satyanarayana (1997), hydrolysed wheat bran contains significant amounts of soluble sugars that are required for the growth of the microorganisms, including 42.5% glucose, 15.4% xylose, 3.1% arabinose and 2.7% galactose. Untreated elephant grass composition in sugars is 35.97% glucose, 15.15% xylose and 5.36% arabinose (Menegol et al, 2014).…”

Section: Resultsmentioning

confidence: 99%

“…Comparing the data from the production of the enzymes (Figures 1 and 2) with the concentrations of cellulose, hemicellulose and lignin (Menegol et al, 2014) leads to the conclusion that the results cannot be directly related to the production of the studied enzymes. Samples with higher concentrations of cellulose (pre-treated with NaOH) and lower lignin concentrations did not have the highest FPA (data not shown).…”

Section: Xylanasesmentioning

confidence: 99%

“…Pre-treatments were then carried out according to Menegol et al (2014). Physical pre-treatment occurred in an autoclave at 120 ºC for 15 min at a 1:4 solid/liquid ratio.…”

Section: Substrate and Pre-treatmentsmentioning

confidence: 99%

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Use of elephant grass (Pennisetum purpureum) as substrate for cellulase and xylanase production in solid-state cultivation by Penicillium echinulatum

Menegol

Scholl

Dillon

et al. 2017

Braz. J. Chem. Eng.

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-The high cost of the enzymes used for the hydrolysis of lignocellulosic biomass is one of the bottlenecks in the production of second-generation ethanol and the use of local biomass, such elephant grass, can help to reduce this cost. In this investigation elephant grass biomass was evaluated as a carbon and inducer source of production of cellulases and xylanases by the fungus Penicillium echinulatum strain 9A02S1 in solid-state cultivation. The highest filter paper activity (13.26 U.g -1 dry matter) and β-glucosidase activity (138.34 U.g -1 dry matter) were obtained on the fifth day of cultivation, in medium containing biomass pre-treated with sulfuric acid and untreated, respectively. The highest endoglucanase activity was 158.44 U.g -1 dry matter in the presence of elephant grass pre-treated with sulfuric acid. The xylanase activity was highest with medium that was formulated with 75% untreated elephant grass and 25% wheat bran (372.62 U.g -1 dry matter). In conclusion, the results showed that it is possible to obtain large amounts of cellulases and xylanases using a cosmopolitan and very low cost substrate such as elephant grass.

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Section: Resultsmentioning

confidence: 99%

Section: Xylanasesmentioning

confidence: 99%

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Use of elephant grass (Pennisetum purpureum) as substrate for cellulase and xylanase production in solid-state cultivation by Penicillium echinulatum

Menegol

Scholl

Dillon

et al. 2017

Braz. J. Chem. Eng.

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“…The samples were then dried at 60°C for three days and stored at ambient temperature for further use (Menegol et al, 2014b).…”

Section: Biomass Pretreatmentmentioning

confidence: 99%

Ethanol production from sugars obtained during enzymatic hydrolysis of elephant grass (Pennisetum purpureum, Schum.) pretreated by steam explosion

Scholl

Menegol

Pitarelo

et al. 2015

Bioresource Technology

Self Cite

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In this work, steam explosion was used a pretreatment method to improve the conversion of elephant grass (Pennisetum purpureum) to cellulosic ethanol. This way, enzymatic hydrolysis of vaccum-drained and water-washed steam-treated substrates was carried out with Penicillium echinulatum enzymes while Saccharomyces cerevisiae CAT-1 was used for fermentation. After 48 h of hydrolysis, the highest yield of reducing sugars was obtained from vaccum-drained steam-treated substrates that were produced after 10 min at 200 °C (863.42 ± 62.52 mg/g). However, the highest glucose yield was derived from water-washed steam-treated substrates that were produced after 10 min at 190 °C (248.34 ± 6.27 mg/g) and 200 °C (246.00 ± 9.60 mg/g). Nevertheless, the highest ethanol production was obtained from water-washed steam-treated substrates that were produced after 6 min at 200 °C. These data revealed that water washing is a critical step for ethanol production from steam-treated elephant grass and that pretreatment generates a great deal of water soluble inhibitory compounds for hydrolysis and fermentation, which were partly characterized as part of this study.

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“…Napier grass or elephant grass (Pennisetum purpureum) is considered as a new alternative energy crop suitable for biofuel production [10,11]. Its annual biomass production is approximately 87 ton/ha [12].…”

Section: Introductionmentioning

confidence: 99%

Co-Digestion of Napier Grass and Its Silage with Cow Dung for Methane Production

2017

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Methane production from co-digestion of grass with cow dung and silage with cow dung was conducted by a bioaugmentation technique. For self-fermentation, maximum methane yield (MY) of 176.66 and 184.94 mL CH4/g-VSadded were achieved at a ratio of grass to cow dung and silage to cow dung of 1:1, respectively. A higher maximum MY of 179.59 and 208.11 mL CH4/g-VSadded was obtained from co-digestion of grass with cow dung and silage with cow dung bioaugmented with anaerobic sludge at a ratio of 3:1. The solid residue left over after co-digestion at a ratio of 3:1 was pretreated by alkaline plus enzyme before used to produce methane and a maximum MY of 333.63 and 301.38 mL CH4/g-VSadded, respectively, was achieved. Overall power generated from codigestion of grass with cow dung plus pretreated solid residues and co-digestion of silage with cow dung plus pretreated solid residues were 0.0397 and 0.007 watt, respectively.

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Increased release of fermentable sugars from elephant grass by enzymatic hydrolysis in the presence of surfactants

Cited by 67 publications

References 35 publications

Use of elephant grass (Pennisetum purpureum) as substrate for cellulase and xylanase production in solid-state cultivation by Penicillium echinulatum

Use of elephant grass (Pennisetum purpureum) as substrate for cellulase and xylanase production in solid-state cultivation by Penicillium echinulatum

Ethanol production from sugars obtained during enzymatic hydrolysis of elephant grass (Pennisetum purpureum, Schum.) pretreated by steam explosion

Co-Digestion of Napier Grass and Its Silage with Cow Dung for Methane Production

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