Process consolidation approaches for cellulosic ethanol production

Joshi, Abhishek; Kanthaliya, Bhanupriya; Meena, Supriya; Khan, Farhana; Arora, Jaya

doi:10.1016/b978-0-12-820297-5.00013-x

Cited by 11 publications

(8 citation statements)

References 84 publications

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“…[28] It is not necessary for the pretreatment method to fall into one of these categories, as several can be combined to improve performance (referred to as combination pretreatment in this review). [29][30][31] In a review, Pachapur et al divided different pretreatment procedures for wood wastes into mild (120 C), normal (>120 C), and extreme (>200 C) categories depending on the operating temperature. [32] The authors looked at studies on pretreatment techniques that used wood as a source in a Canadian context.…”

Section: Pre-treatment Processesmentioning

confidence: 99%

A review of Canadian wood conversion technologies for the production of fuels and chemicals

et al. 2023

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Canada has 347 million ha of forest cover, contributing to the potential large availability of wood‐based resources. Although Canada's forest sector contributed $23.7 billion to the national nominal gross domestic product (GDP) in 2019, the GDP contribution of the wood product manufacturing subsector shrank by 6%. To reposition the Canadian forest industry, new forest management practices and wood‐based conversion technologies should be applied. In this context, the use of woody biomass in biorefineries to produce clean energy, fuels, and chemicals is becoming increasingly significant. There is a need to understand the current status and challenges of the wood‐based biomass conversion technologies that have been and are being developed in Canada. This information will help decision‐makers in formulating and implementing forest sector‐related policies for a sustainable bioeconomy in Canada. This study is focused on a review of Canadian woody biomass conversion technologies. Our critical review identified considerable potential biomass conversion technologies specialized for woody feedstock, all in the Canadian setting. We focused on the prospects of revitalizing Canada's pulp and paper industry through the integration of pre‐treatment processes and biochemical technologies. The thermochemical conversion pathway was identified as the dominant route for woody feedstock valorization. The review also identified pathways with the potential to diversify the existing product mix that generate products from wood streams, such as chemicals and biomaterials. Most of the biochemical and thermochemical research done in institutional and multi‐institutional research collaborations from laboratory scale to industrial scale will boost the chances of the commercialization of a wood‐based biorefinery in Canada.

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Section: Pre-treatment Processesmentioning

confidence: 99%

A review of Canadian wood conversion technologies for the production of fuels and chemicals

et al. 2023

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“…Research in the field of obtaining green ethanol both from pulp and paper mill waste and, in principle, from wood and plant biomass is being carried out quite widely [13,14,15]. At the same time, the need to conserve resources and ensure efficiency requires a deeper study of some issues.…”

Section: Literature Reviewmentioning

confidence: 99%

Bioethanol production from secondary bioresources of the pulp and paper industry

Bolotnikova,

Kvasha,

Malevskaia-Malevich

2023

E3S Web of Conf.

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The prospects for obtaining bioethanol based on secondary bioresources of the pulp and paper industry are discussed in order to close economic cycles. The transformation of sugars of acidic hydrolyzate of deciduous wood into bioethanol by batch culture of a selected strain of the yeast Saccharomyces cerevisiae with a combination of various xylose-assimilating yeasts was studied. The ethanol yield from hexose`s part was 46% from fermented sugars, its concentration reached to 9,0±0,6 g l-1. The use of pentose sugars under microaerobic conditions (concentration of dissolved oxygen 0.5-3.0%) gave the efficiency of ethanol production up to 26.7 - 35.5% from fermented sugars. The ethanol concentration in terms of the pentose`s fraction was 3.9-4.5 g l-1 (the yeast Pachysolen tannophilus); 5.2 g l-1 (the yeast Candida tropicalis); 5.6 g l-1 (the yeast Candida shehatae). The total amount of ethanol obtained from both hexose and pentose parts after distillation was 4.2-4.6 g (5.2-5.7 ml) with alcohol by volume 96%.

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“…To overcome this problem, researchers have previously focused on disrupting structural and compositional complexity through distinct strategies, such as pre-treatments and consolidating bioprocessing [ 30 , 31 ]. However, such methods effectively solubilize the lignocellulose polymers into fermentable sugars but employed several intricacies, that is, destruction of valuable sugars fraction, generation of inhibitor compounds, and irreversible salts, which can make downstream processes complex and expensive [ 16 , 32 ]. Recent advances in metabolic engineering have enabled the altered synthesis of the various wall polymers to increase polysaccharide accessibility and reduction of polymer-derived processing inhibitor, along with high hexose/pentose ratio in the biomass [ 33 ].…”

Section: Recent Metabolic Advances In the Lignocellulosic Feedstockmentioning

confidence: 99%

“…The microbial-assisted bioconversion processes greatly affect the cost-competitive biofuel production [ 15 ]. It seems that the capital and operational cost associated with the microbial bioconversion process are the highest contributors to the overall cost production of biofuels [ 16 ]. Several native and non-indigenous microorganisms can catalyze lignocellulose substrates (LCS) into a broad array of biofuels.…”

Section: Introductionmentioning

confidence: 99%

Recent advances in metabolic engineering of microorganisms for advancing lignocellulose-derived biofuels

et al. 2022

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Combating climate change and ensuring energy supply to a rapidly growing global population has highlighted the need to replace petroleum fuels with clean, and sustainable renewable fuels. Biofuels offer a solution to safeguard energy security with reduced ecological footprint and process economics. Over the past years, lignocellulosic biomass has become the most preferred raw material for the production of biofuels, such as fuel, alcohol, biodiesel, and biohydrogen. However, the cost-effective conversion of lignocellulose into biofuels remains an unsolved challenge at the industrial scale. Recently, intensive efforts have been made in lignocellulose feedstock and microbial engineering to address this problem. By improving the biological pathways leading to the polysaccharide, lignin, and lipid biosynthesis, limited success has been achieved, and still needs to improve sustainable biofuel production. Impressive success is being achieved by the retouring metabolic pathways of different microbial hosts. Several robust phenotypes, mostly from bacteria and yeast domains, have been successfully constructed with improved substrate spectrum, product yield and sturdiness against hydrolysate toxins. Cyanobacteria is also being explored for metabolic advancement in recent years, however, it also remained underdeveloped to generate commercialized biofuels. The bacterium Escherichia coli and yeast Saccharomyces cerevisiae strains are also being engineered to have cell surfaces displaying hydrolytic enzymes, which holds much promise for near-term scale-up and biorefinery use. Looking forward, future advances to achieve economically feasible production of lignocellulosic-based biofuels with special focus on designing more efficient metabolic pathways coupled with screening, and engineering of novel enzymes.

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Process consolidation approaches for cellulosic ethanol production

Cited by 11 publications

References 84 publications

A review of Canadian wood conversion technologies for the production of fuels and chemicals

A review of Canadian wood conversion technologies for the production of fuels and chemicals

Bioethanol production from secondary bioresources of the pulp and paper industry

Recent advances in metabolic engineering of microorganisms for advancing lignocellulose-derived biofuels

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