Comparison of different pretreatment methods based on residual lignin effect on the enzymatic hydrolysis of switchgrass

Nlewem, Kingsley C.; Thrash, Marvin E.

doi:10.1016/j.biortech.2010.02.031

Cited by 87 publications

(43 citation statements)

References 24 publications

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“…The structural changes of pretreated corn stover could be contributed to the significant decrease of hemicellulose and lignin contents during this period. Some physical and chemical pretreatments gave the same results (Behera et al, 1996;Kim et al, 2003;Nlewem and Thrash Jr, 2010). The structure of pretreated samples showed great changes: the surface of corn stover became rugged; the fibers were separated with many small pores.…”

Section: Scanning Electron Micrographs Of Corn Stoversupporting

confidence: 50%

Effect of biological pretreatment with Trametes hirsuta yj9 on enzymatic hydrolysis of corn stover

Sun

Jiang

Yuan

et al. 2011

International Biodeterioration & Biodegradation

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Section: Scanning Electron Micrographs Of Corn Stoversupporting

confidence: 50%

Effect of biological pretreatment with Trametes hirsuta yj9 on enzymatic hydrolysis of corn stover

Sun

Jiang

Yuan

et al. 2011

International Biodeterioration & Biodegradation

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“…NaOH, Ca(OH) 2 ) can improve lignin removal efficiency. 16 Nlewem et al 17 reported that alkali pretreatment decreased lignin content considerably. Xu et al 18 reported maximum lignin reduction of 85.8% by pretreating switchgrass with NaOH at 121…”

Section: Introductionmentioning

confidence: 99%

Enhanced saccharification of corn straw pretreated by alkali combining crude ligninolytic enzymes

Jiang

Sun

et al. 2012

J of Chemical Tech & Biotech

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“…Lignin is a complex polymer of phenylpropane units (sinapyl, p-coumaryl, and coniferyl alcohol) that acts as a cementing and waterproofing agent in plant cell wall. It is generally considered to be a physical barrier in achieving efficient saccharification of biomass (Gunjkar et al, 2001;Berlin et al, 2005;Nlewem and Thrash, 2010). Despite high cellulose content in SD, its high lignin content appears to make it less suitable feedstock.…”

Section: Biomass Compositionmentioning

confidence: 99%

Evaluation and Selection of Potential Biomass Sources of North-East India towards Sustainable Bioethanol Production

et al. 2017

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Vegetation biomass production in North-East India within Indo-Burma biodiversity hotspot is luxuriant and available from April to October to consider their potential for bioethanol production. Potential of six lignocellulosic biomass (LCB) sources; namely, sugarcane bagasse (BG), cassava aerial parts (CS), ficus fruits (Ficus cunia) (FF), "phumdi" (floating biomass), rice straw (RS), and sawdust were investigated for bioethanol production using standard techniques. Morphological and chemical changes were evaluated by Scanning electron microscopy and Fourier transform infrared spectroscopy and quantity of sugars and inhibitors in LCB were determined by High performance liquid chromatography. Hydrothermally treated BG, CS, and FF released 954.54, 1,354.33, and 1,347.94 mg/L glucose and 779.31, 612.27, and 1,570.11 mg/L of xylose, respectively. Inhibitors produced due to effect of hydrothermal pretreatment ranged from 42.8 to 145.78 mg/L acetic acid, below detection level (BDL) to 17.7 µg/L 5-hydroxymethylfurfural, and BDL to 56.78 µg/L furfural. The saccharification efficiency of hydrothermally treated LCB (1.35-28.64%) was significantly higher compared with their native counterparts (0.81-17.97%). Consolidated bioprocessing of the LCB using MTCC 1755 (Fusarium oxysporum) resulted in maximum ethanol concentration of 0.85 g/L and corresponded to 42 mg ethanol per gram of hydrothermally treated BG in 120 h followed by 0.83 g/L corresponding to 41.5 mg/g of untreated CS in 144 h. These ethanol concentrations corresponded to 23.43 and 21.54% of theoretical ethanol yield, respectively. LCB of CS and FF emerged as a suitable material to be subjected to test for enhanced ethanol production in future experiments through efficient fermentative microbial strains, appropriate enzyme loadings, and standardization of other fermentation parameters.

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Comparison of different pretreatment methods based on residual lignin effect on the enzymatic hydrolysis of switchgrass

Cited by 87 publications

References 24 publications

Effect of biological pretreatment with Trametes hirsuta yj9 on enzymatic hydrolysis of corn stover

Effect of biological pretreatment with Trametes hirsuta yj9 on enzymatic hydrolysis of corn stover

Enhanced saccharification of corn straw pretreated by alkali combining crude ligninolytic enzymes

Evaluation and Selection of Potential Biomass Sources of North-East India towards Sustainable Bioethanol Production

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