Pretreatment and hydrolysis of lignocellulosic wastes for butanol production: Challenges and perspectives

Amiri, Hamid; Karimi, Keikhosro

doi:10.1016/j.biortech.2018.08.117

Cited by 129 publications

(53 citation statements)

References 116 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Butanol-producing Clostridium sp. can uptake a wide range of hexoses, pentoses, and oligomers obtained from the hydrolysis of cellulose and hemicellulose [130]. Corn fiber hydrolysate was used for C. beijerinckii fermentation resulting in the production of 9.3 g/L ABE [131].…”

Section: Conversion Route Process End Productsmentioning

confidence: 99%

Clostridium sp. as Bio-Catalyst for Fuels and Chemicals Production in a Biorefinery Context

et al. 2019

View full text Add to dashboard Cite

Clostridium sp. is a genus of anaerobic bacteria capable of metabolizing several substrates (monoglycerides, diglycerides, glycerol, carbon monoxide, cellulose, and more), into valuable products. Biofuels, such as ethanol and butanol, and several chemicals, such as acetone, 1,3-propanediol, and butyric acid, can be produced by these organisms through fermentation processes. Among the most well-known species, Clostridium carboxidivorans, C. ragsdalei, and C. ljungdahlii can be highlighted for their ability to use gaseous feedstocks (as syngas), obtained from the gasification or pyrolysis of waste material, to produce ethanol and butanol. C. beijerinckii is an important species for the production of isopropanol and butanol, with the advantage of using hydrolysate lignocellulosic material, which is produced in large amounts by first-generation ethanol industries. High yields of 1,3 propanediol by C. butyricum are reported with the use of another by-product from fuel industries, glycerol. In this context, several Clostridium wild species are good candidates to be used as biocatalysts in biochemical or hybrid processes. In this review, literature data showing the technical viability of these processes are presented, evidencing the opportunity to investigate them in a biorefinery context.

show abstract

Section: Conversion Route Process End Productsmentioning

confidence: 99%

Clostridium sp. as Bio-Catalyst for Fuels and Chemicals Production in a Biorefinery Context

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Therefore, ABE fermentation from lignocellulosic materials needs to be improved through metabolic engineering of clostridia (overexpressing the heterologous minicellulosomes [113,114]) and/or pretreatment techniques. As for cellulosic ABE fermentation, it could be summarized as involving: (1) material pretreatment (reviewed elsewhere in detail [115]); (2) enzymatic hydrolysis of cellulose to monosaccharides (hexose and pentose); (3) sugar fermentation to butanol, and (4) product recovery by distillation [116]. However, the efficiency of the concurrent uptake and metabolism of hexose and pentose is significantly impeded by glucose-mediated carbon catabolite repression [29,117].…”

Section: Improvement Of Carbohydrate Utilizationmentioning

confidence: 99%

Pathway dissection, regulation, engineering and application: lessons learned from biobutanol production by solventogenic clostridia

Huang

et al. 2020

Biotechnol Biofuels

View full text Add to dashboard Cite

The global energy crisis and limited supply of petroleum fuels have rekindled the interest in utilizing a sustainable biomass to produce biofuel. Butanol, an advanced biofuel, is a superior renewable resource as it has a high energy content and is less hygroscopic than other candidates. At present, the biobutanol route, employing acetone-butanolethanol (ABE) fermentation in Clostridium species, is not economically competitive due to the high cost of feedstocks, low butanol titer, and product inhibition. Based on an analysis of the physiological characteristics of solventogenic clostridia, current advances that enhance ABE fermentation from strain improvement to product separation were systematically reviewed, focusing on: (1) elucidating the metabolic pathway and regulation mechanism of butanol synthesis; (2) enhancing cellular performance and robustness through metabolic engineering, and (3) optimizing the process of ABE fermentation. Finally, perspectives on engineering and exploiting clostridia as cell factories to efficiently produce various chemicals and materials are also discussed.

show abstract

“…Although a number of pretreatment techniques operated at severe conditions (e.g., steam explosion and hot water pretreatment, 160-240 • C, 5-45 min, pretreatment severity factor (log R 0 ) of 2.8-4.8) were effective at enhancing enzymatic hydrolysis of the pretreated samples, they had high energy consumption and produced enzyme-inhibiting by-products as compared to those observed at mild conditions (e.g., acid pretreatment, 120 • C, 5-45 min, log R 0 of 1.3-2.2) [4,20,21]. Some other processes with less by-product formation and energy requirement (e.g., biological pretreatment at room temperature) can also improve bioconversion, but these processes are typically time-consuming and/or consume sugars of raw stalks during the pretreatment [2,11]. Up to now, there is no one strategy that could well meet all requirements for the ideal pretreatment.…”

Section: Introductionmentioning

confidence: 96%

“…Energy, environmental pollution, public health and food safety are the most important issues for global sustainable development, and production of renewable energy from different organic wastes is attracting increasing attention [1][2][3][4][5][6][7][8]. Lignocellulosic biomass (e.g., corn stalk, wheat straw, and rice straw), which is a sustainable and renewable energy source with reduced net CO 2 emission, has been widely investigated as substrates for ethanol and biogas fermentation [8,9].…”

Section: Introductionmentioning

confidence: 99%

“…One of the major drawbacks when lignocellulosic biomass is being converted is its recalcitrant structure. Various methods, including steam explosion, hot water, organic solvent, acid, and alkaline pretreatments, have been investigated for improving bioconversion efficiency of lignocellulosic biomass [2,8,[14][15][16][17][18][19]. An ideal pretreatment process aims 1) to improve enzymatic hydrolysis by dissolving lignocellulosic components and changing microstructure, 2) to minimize the loss of sugars and the formation of by-products for an efficient sugar recovery in the pretreatment step, and 3) to reduce the energy demands and the cost [14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Two-Step Ferric Chloride and Dilute Alkaline Pretreatment for Enhancing Enzymatic Hydrolysis and Fermentable Sugar Recovery from Miscanthus sinensis

Chen

et al. 2020

Molecules

View full text Add to dashboard Cite

A two-step process was proposed to enhance enzymatic hydrolysis of Miscanthus sinensis based on a comparative study of acid/alkaline pretreatments. Ferric chloride pretreatment (FP) effectively removed hemicellulose and recovered soluble sugars, but the enzymatic hydrolysis was not efficient. Dilute alkaline pretreatment (ALP) resulted in much better delignification and stronger morphological changes of the sample, making it more accessible to enzymes. While ALP obtained the highest sugar yield during enzymatic hydrolysis, the soluble sugar recovery from the pretreatment stage was still limited. Furthermore, a two-step ferric chloride and dilute alkaline pretreatment (F-ALP) has been successfully developed by effectively recovering soluble sugars in the first FP step and further removing lignin of the FP sample in the second ALP step to improve its enzymatic hydrolysis. As a result, the two-step process yielded the highest total sugar recovery (418.8 mg/g raw stalk) through the whole process.

show abstract

Pretreatment and hydrolysis of lignocellulosic wastes for butanol production: Challenges and perspectives

Cited by 129 publications

References 116 publications

Clostridium sp. as Bio-Catalyst for Fuels and Chemicals Production in a Biorefinery Context

Clostridium sp. as Bio-Catalyst for Fuels and Chemicals Production in a Biorefinery Context

Pathway dissection, regulation, engineering and application: lessons learned from biobutanol production by solventogenic clostridia

A Two-Step Ferric Chloride and Dilute Alkaline Pretreatment for Enhancing Enzymatic Hydrolysis and Fermentable Sugar Recovery from Miscanthus sinensis

Contact Info

Product

Resources

About