Lignocellulosic biomass to bioethanol, a comprehensive review with a focus on pretreatment

Mood, Sohrab Haghighi; Golfeshan, Amir Hossein; Tabatabaei, Meisam; Jouzani, Gholamreza Salehi; Najafi, G.; Gholami, Mahdi; Ardjmand, Mehdi

doi:10.1016/j.rser.2013.06.033

Cited by 1,062 publications

(391 citation statements)

References 180 publications

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“…The HMF and furfural yields shown in Table 3 are much less than that (HMF: 0.22-0.36 g/kg; furfural: 0.14-0.32 g/kg) of acid H2SO4 pre-soaking (2% w/w) treated Giant reed (Di Girolamo et al 2013). These findings are in accordance with the previous report that the HTP added acid catalyst will be easier to produce inhibitors than that without acid addition (Mood et al 2013).…”

Section: Sugars and Inhibitorssupporting

confidence: 90%

Enhanced Biogas Yield of Chinese Herbal Medicine Extraction Residue by Hydrothermal Pretreatment

Wang

Zhang²,

Yan

et al. 2017

BioResources

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aChinese herbal medicine extraction residue (CHER) is a special organic waste produced in China. Because of the high content of lignocelluloses, CHER have a weak bioconversion efficiency for bio-products production. This study investigates the effect of a hydrothermal pretreatment (HTP, 140 to 220 °C, 15 min) on the organic matter solubilisation, biochemical methane potential, and methanation kinetics of CHER during anaerobic digestion (AD). The AD test was conducted with 5 g/L total solid at 35 °C for 30 d. The results showed that the HTP clearly improved the solubilisation of CHER, and the obtained soluble COD (%) reached over 30% (only 4.5% in untreated). Acetic acid, xylose, and glucose were found to be the main products in the hydrolysate. The methane yield and methanation speed of the treated CHER were also enhanced. The highest methane yield of 306 mL/g volatile solid was achieved at a HTP temperature of 180 °C, while the untreated control was only 175 mL/g VS. Moreover, a carbonisation phenomenon was observed at HTP temperatures over 200 °C, which resulted in a loss of organic matter and methane yield.

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Section: Sugars and Inhibitorssupporting

confidence: 90%

Enhanced Biogas Yield of Chinese Herbal Medicine Extraction Residue by Hydrothermal Pretreatment

Wang

Zhang²,

Yan

et al. 2017

BioResources

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“…During a pretreatment procedure, hydrogen bonds in cellulose are disrupted, crosslinked matrix of hemicelluloses and lignin are broken down, and finally, the porosity and surface area of cellulose are increased for subsequent enzymatic hydrolysis (Taherzadeh and Karimi, 2008;Li et al, 2010;Haghighi Mood et al, 2013Rajendran and Taherzadeh, 2014). Previously, several pretreatment technologies, such as chemical pretreatment (alkali, acid, organosolv, ozonolysis and ionic liquids), physical pretreatment (grinding and milling, microwave and extrusion), physico-chemical pretreatment (steam explosion, liquid hot water, ammonia fiber explosion, wet oxidation and CO2 explosion) and biological pretreatment (using microorganisms) have been developed (Palmqvist et al, 2000;Isroi et al, 2011;Haghighi Mood et al, 2013Rajendran and Taherzadeh, 2014).…”

Section: New Pretreatment Technologiesmentioning

confidence: 99%

“…These new promising strategies include (1) increasing cellulose composition (Coleman et al, 2009), (2) reducing plant cell wall recalcitrance and cellulose crystallinity (Fry et al, 2008), (3) producing cellulases and other protein modules which are necessary for disruption of plant cell wall substrates (Vaaje-Kolstad et al, 2005;Biswas et al, 2006;Cosgrove et al, 2007;Mei et al, 2009;Park et al, 2011), and (4) reducing lignin content in plants by down-regulation of lignin biosynthesis (Ralph et al, 2006) or diverting lignin biosynthesis towards cellulose synthesis (Chen and Dixon, 2007;Haghighi Mood et al, 2013).…”

Section: New Pretreatment Technologiesmentioning

confidence: 99%

Advances in consolidated bioprocessing systems for bioethanol and butanol production from biomass: a comprehensive review

2015

Self Cite

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HIGHLIGHTS Various CBP strategies have been discussed. Recently, lignocellulosic biomass as the most abundant renewable resource has been widely considered for bioalcohols production. However, the complex structure of lignocelluloses requires a multi-step process which is costly and time consuming. Although, several bioprocessing approaches have been developed for pretreatment, saccharification and fermentation, bioalcohols production from lignocelluloses is still limited because of the economic infeasibility of these technologies. This cost constraint could be overcome by designing and constructing robust cellulolytic and bioalcohols producing microbes and by using them in a consolidated bioprocessing (CBP) system. This paper comprehensively reviews potentials, recent advances and challenges faced in CBP systems for efficient bioalcohols (ethanol and butanol) production from lignocellulosic and starchy biomass. The CBP strategies include using native single strains with cellulytic and alcohol production activities, microbial co-cultures containing both cellulytic and ethanologenic microorganisms, and genetic engineering of cellulytic microorganisms to be alcohol-producing or alcohol producing microorganisms to be cellulytic. Moreover, high-throughput techniques, such as metagenomics, metatranscriptomics, next generation sequencing and synthetic biology developed to explore novel microorganisms and powerful enzymes with high activity, thermostability and pH stability are also discussed. Currently, the CBP technology is in its infant stage, and ideal microorganisms and/or conditions at industrial scale are yet to be introduced. So, it is essential to bring into attention all barriers faced and take advantage of all the experiences gained to achieve a high-yield and low-cost CBP process.

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“…They are broadly classified as first generation materials (including starch and sugar) and second generation materials (lignocellulosic sugar). Currently the former are the most employed [42], but lignocellulosic materials, which are abundant and inexpensive, are gaining great interest [43].…”

Section: Bioethanol Productionmentioning

confidence: 99%

Combined Biogas and Bioethanol Production: Opportunities and Challenges for Industrial Application

Cesaro

Belgıorno

2015

Energies

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Abstract:In the last decades the increasing energy requirements along with the need to face the consequences of climate change have driven the search for renewable energy sources, in order to replace as much as possible the use of fossil fuels. In this context biomass has generated great interest as it can be converted into energy via several routes, including fermentation and anaerobic digestion. The former is the most common option to produce ethanol, which has been recognized as one of the leading candidates to substitute a large fraction of the liquid fuels produced from oil. As the economic competitiveness of bioethanol fermentation processes has to be enhanced in order to promote its wider implementation, the most recent trends are directed towards the use of fermentation by-products within anaerobic digestion. The integration of both fermentation and anaerobic digestion, in a biorefinery concept, would allow the production of ethanol along with that of biogas, which can be used to produce heat and electricity, thus improving the overall energy balance. This work aims at reviewing the main studies on the combination of both bioethanol and biogas production processes, in order to highlight the strength and weakness of the integrated treatment for industrial application.

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Lignocellulosic biomass to bioethanol, a comprehensive review with a focus on pretreatment

Cited by 1,062 publications

References 180 publications

Enhanced Biogas Yield of Chinese Herbal Medicine Extraction Residue by Hydrothermal Pretreatment

Enhanced Biogas Yield of Chinese Herbal Medicine Extraction Residue by Hydrothermal Pretreatment

Advances in consolidated bioprocessing systems for bioethanol and butanol production from biomass: a comprehensive review

Combined Biogas and Bioethanol Production: Opportunities and Challenges for Industrial Application

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