Pretreatment of Lignocellulosic Materials

Rajendran, Karthik; Taherzadeh, Mohammad J.

doi:10.1002/9781118845394.ch3

Cited by 11 publications

(2 citation statements)

References 127 publications

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“…At present, 3% of the electricity produced in Hawaii comes from biomass [3]. Lignocelluloses are plentiful organics accessible today, accounting for up to 50 billion tons in dry weight [4].…”

Section: Introductionmentioning

confidence: 99%

Effect of Moisture Content on Lignocellulosic Power Generation: Energy, Economic and Environmental Impacts

Rajendran

2017

Processes

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Abstract:The moisture content of biomass affects its processing for applications such as electricity or steam. In this study, the effects of variation in moisture content of banagrass and energycane was evaluated using techno-economic analysis and life-cycle assessments. A 25% loss of moisture was assumed as a variation that was achieved by field drying the biomass. Techno-economic analysis revealed that high moisture in the biomass was not economically feasible. Comparing banagrass with energycane, the latter was more economically feasible; thanks to the low moisture and ash content in energycane. About 32 GWh/year of electricity was produced by field drying 60,000 dry MT/year energycane. The investment for different scenarios ranged between $17 million and $22 million. Field-dried energycane was the only economically viable option that recovered the investment after 11 years of operation. This scenario was also more environmentally friendly, releasing 16-gCO 2 equivalent/MJ of electricity produced.

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Section: Introductionmentioning

confidence: 99%

Effect of Moisture Content on Lignocellulosic Power Generation: Energy, Economic and Environmental Impacts

Rajendran

2017

Processes

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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%

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

2015

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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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Engineering Saccharomyces cerevisiae for C5 Fermentation: A Step Towards Second-Generation Biofuel Production

Yusuf

Gaur

2017

Metabolic Engineering for Bioactive Compounds

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Pretreatment of Lignocellulosic Materials

Cited by 11 publications

References 127 publications

Effect of Moisture Content on Lignocellulosic Power Generation: Energy, Economic and Environmental Impacts

Effect of Moisture Content on Lignocellulosic Power Generation: Energy, Economic and Environmental Impacts

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

Engineering Saccharomyces cerevisiae for C5 Fermentation: A Step Towards Second-Generation Biofuel Production

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