Commercial feasibility of lignocellulose biodegradation: possibilities and challenges

Taha, Mohamed; Foda, Mohamed F.; Shahsavari, Esmaeil; Aburto‐Medina, Arturo; Adetutu, Eric M.; Ball, Andrew S.

doi:10.1016/j.copbio.2016.02.012

Cited by 182 publications

(87 citation statements)

References 41 publications

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“…Waste biomass is the low‐cost byproduct of agriculture and forestry, including wheat straw, rice straw, sugarcane bagasse, and corn stover. The global yield of waste biomass was estimated between 10 and 50 billion tons per year . It is an ideal feedstock for ethanol production because it is generated as crop byproducts that must be discarded.…”

Section: Cellulosic Ethanol Industry Is An Emerging Source Of Ligninmentioning

confidence: 99%

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The current and emerging sources of technical lignins and their applications

Rao

2018

Biofuels Bioprod Bioref

158

142

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Technical lignins are bulk feedstocks. They are generated as byproducts from pulping or cellulosic ethanol production. Since lignin undergoes significant structural changes in the chemical and physical treatments, all technical lignins are unique in terms of chemical structure, molecular weight, polydispersity, and impurity profile. Kraft lignin is potentially the largest source of technical lignin as new isolation technologies have been implemented on industrial scale in recent years. Lignosulfonate has been an integral product in sulfite pulping biorefinery. It has a well-established market in construction industry. Organosolv-like lignin production is increasing as cellulosic ethanol has been promoted as the substitute of fossil fuel. It may have unique applications because it has low molecule weight and is free from sulfur. Technical lignin application is expected to expand as the characteristics are improved with fractionation or chemical modification. The application of technical lignin has been focusing on developing products equivalent to those made by petroleum chemicals. The recent development in technical lignin supply should increase its market share as additives in polyurethanes and as the substitute of phenol-formaldehyde adhesives. Quality improvement of technical lignin may also encourage the study of lignin as an alternative feedstock for carbon fiber. In addition, technical lignin depolymerization has been extensively explored to provide renewable aromatic chemicals. Starting from controlled pyrolysis and thermal liquefaction as the baseline technologies, many different chemical depolymerization have been invented with a wide range of underlying chemical principles.

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Section: Cellulosic Ethanol Industry Is An Emerging Source Of Ligninmentioning

confidence: 99%

“…The global yield of waste biomass was estimated between 10 and 50 billion tons per year. 100 It is an ideal feedstock for ethanol production because it is generated as crop byproducts that must be discarded.…”

Section: Membrane Technology In Biorefinery Based On Sulfite Processmentioning

confidence: 99%

The current and emerging sources of technical lignins and their applications

Rao

2018

Biofuels Bioprod Bioref

158

142

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“…The shortage of the World's fossil fuel supply and the growing environmental deterioration from the use of petroleum has increased the necessity to exploit alternative and renewable energy resources . Lignocellulosic wastes represent the most abundant renewable biomass on Earth and have been considered as potential suitable candidates for the production of biofuels without introducing conflict between fuel and food supply . Rice straw (RS) is one of the most plentiful and attractive lignocellulosic wastes worldwide, and about 731–900 million tons of RS is estimated to be produced globally per year .…”

Section: Introductionmentioning

confidence: 99%

Improved enzymatic hydrolysis and ethanol production by combined alkaline peroxide and ionic liquid‐water mixtures pretreatment of rice straw

Hong

Wang²,

Zhu³

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND Rice straw (RS), one of the most plentiful lignocellulosic wastes worldwide, has been considered a potential candidate to produce bioethanol. The object of this work was to develop an efficient and feasible pretreatment process for RS with alkaline peroxide combined with ionic liquid (IL)–water mixtures, reveal the mechanism, and achieve biomass valorization. RESULTS Alkaline peroxide pretreatment under mild conditions combined with IL–water mixtures pretreatment at a water content of 30 wt% was established, leading to a maximum lignin removal of 63.8% with an enzymolysis efficiency of 92.1% and a simultaneous saccharification and co‐fermentation efficiency of 91.0%. Furthermore, the recycled IL also showed good performance with the established pretreatment process, resulting in 251.6 g L−1 of reducing sugar and 91.9 g L−1 ethanol at high solid loading. The alkaline peroxide pretreatment enhanced lignin extraction and disrupted the RS structure to facilitate the dissolution of amorphous components by the IL–water mixtures. CONCLUSION A simple and efficient pretreatment was successfully established. The IL was successfully recycled for further pretreatments, and high concentrations of reducing sugars and ethanol were achieved using the pretreated RS. The effectiveness of the pretreatment process suggested potential application in future biorefineries. © 2018 Society of Chemical Industry

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“…Moreover, production of bioethanol from edible foods contain sugars and starch is much easier than its production from LCBs. The cost of these sources, the environmental concerns and the debate on using of edible food (first biofuel generation), are the reasons have made the production of bioethanol from edible sources less attractive [44]. Therefore, much interests have been grown recently by researchers and others in producing it from LCBs.…”

Section: Production Of Bioethanolmentioning

confidence: 99%