Systematic procedure and framework for synthesis and evaluation of bioethanol production processes from lignocellulosic biomass

Silva, André Rodrigues Gurgel da; Errico, Massimiliano; Rong, Ben-Guang

doi:10.1016/j.biteb.2018.08.015

Cited by 19 publications

(4 citation statements)

References 42 publications

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“…Lignocellulosic biomass, the most abundant, inexpensive alternative to food crop resources, represents a possible feedstock for renewable chemicals and fuels [1]. However, inhibitors (furans, weak acids and phenols) are inevitably formed during pretreatment and hydrolysis of lignocellulosic substrates [2] and are harmful to Zymomonas mobilis growth and ethanol fermentation.…”

Section: Introductionmentioning

confidence: 99%

Genome shuffling enhances stress tolerance of Zymomonas mobilis to two inhibitors

Wang

Han

et al. 2019

Biotechnol Biofuels

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Background: Furfural and acetic acid are the two major inhibitors generated during lignocellulose pretreatment and hydrolysis, would severely inhibit the cell growth, metabolism, and ethanol fermentation efficiency of Zymomonas mobilis. Effective genome shuffling mediated by protoplast electrofusion was developed and then applied to Z. mobilis. Results: After two rounds of genome shuffling, 10 different mutants with improved cell growth and ethanol yield in the presence of 5.0 g/L acetic acid and 3.0 g/L furfural were obtained. The two most prominent genome-shuffled strains, 532 and 533, were further investigated along with parental strains in the presence of 7.0 g/L acetic acid and 3.0 g/L furfural. The results showed that mutants 532 and 533 were superior to the parental strain AQ8-1 in the presence of 7.0 g/L acetic acid, with a shorter fermentation time (30 h) and higher productivity than AQ8-1. Mutant 533 exhibited subtle differences from parental strain F34 in the presence of 3.0 g/L furfural. Mutations present in 10 genome-shuffled strains were identified via whole-genome resequencing, and the source of each mutation was identified as either de novo mutation or recombination of the parent genes. Conclusions: These results indicate that genome shuffling is an efficient method for enhancing stress tolerance in Z. mobilis. The engineered strains generated in this study could be potential cellulosic ethanol producers in the future.

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Section: Introductionmentioning

confidence: 99%

Genome shuffling enhances stress tolerance of Zymomonas mobilis to two inhibitors

Wang

Han

et al. 2019

Biotechnol Biofuels

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“…Scientific advancement in genetics, biotechnology, engineering and process chemistry have yielded 'biorefinery,' a novel manufacturing concept. It converts renewable agro-wastes / biomass into biofuels, nutrients and by-products while integrating different technologies [11]. It offers the possibility for sustainable production of biopower and biomaterials [12,13].…”

Section: Introductionmentioning

confidence: 99%

Energy and nutrient recovery from agro-wastes: Rethinking their potential possibilities

Vaish

Srivastava

Singh

et al. 2019

Environmental Engineering Research

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Agricultural sector has inescapably drawn attention towards itself due to growing concern over population explosion, changing climate and depletion of resources. Advancements in technology have caused rapid boost in farm productivity and hence huge production of agro-wastes. There have been massive deteriorating impacts of agro-wastes on existing environmental conditions, creating wide scale environmental pollution as well as biodiversity loss. Since, agro-wastes have huge potential in the form of energy and nutrient recovery (ENR), amalgamations of different technologies would promote sustainability. ENR not only adjoins an added profitable product but also facilitates to close environmental nutrient cycles. This provides a substitute to existing unsustainable approaches that are energy demanding and reliant on nonrenewable sources of energy. This review underpins why ENR from agro-waste must be key concern in production of array of higher value products.

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“…The environmental impact is calculated by subtracting environmental costs from environmental benefits, while MESP takes into account the annual capital cost investment, annual operating cost, and cost of lignocellulosic feedstock. Contrary to da Silva et al [60], they found that corn stover has a negative environmental benefit due to its low lignin content that allows a lower substitution of fossil energy sources. However, it should be noted that they resulted in much lower values, e.g., only 14.1% lignin and 29.6% cellulose content, compared to the other study (15.5% and 37.6%, respectively).…”

Section: Lignocellulosic Ethanol Studiesmentioning

confidence: 64%

“…According to the comparison of da Silva et al [60], spruce is the cheapest 2G raw material; however, due to its relatively low convertible sugar (cellulose and hemicellulose) content, Eucalyptus-based ethanol is the cheapest option. By using the theoretical ethanol yield, this would result in 0.1376 USD/L.…”

Section: Lignocellulosic Ethanol Studiesmentioning

confidence: 99%

Economic Aspects and Sustainability of Ethanol Production—A Systematic Literature Review

Mizik

2021

Energies

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Meeting the increasing global energy demand in a sustainable way is a major challenge for humanity. One of the solutions in the transportation sector is ethanol, which is currently the only economically viable direct fuel substitute. In addition to the first-generation technology, which provides the vast majority of production, better results can be continuously realized by using advanced technologies. This study aims to investigate the economic aspects and sustainability issues of ethanol production with a systematic literature review. During the selection process, 64 studies from a total of 16,141 identified articles were analyzed in-depth. There is a consensus that first-generation production methods cannot result in a long-term solution. However, advanced technologies are currently immature, and ethanol production is more expensive with them. The use of wastes/residues and coproducts can improve both the economic outlook and sustainability of the advanced technologies. Overall, the newer generations of technological advancements are constantly improving the environmental performance, whereas the economic performance is deteriorating. Considering low oil prices (0.36 USD/L), none of the ethanol production methods can be competitive on a purely cost basis. This increases the importance of coproducts (further processing and more valuable coproducts). Regarding sustainability, a complex analysis is essential, which must cover at least the environmental, social, and economic aspects. At the methodology level, a complex life cycle analysis seems to be the best tool, as it can take into account these relevant aspects (environmental, economic, and social).

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Systematic procedure and framework for synthesis and evaluation of bioethanol production processes from lignocellulosic biomass

Cited by 19 publications

References 42 publications

Genome shuffling enhances stress tolerance of Zymomonas mobilis to two inhibitors

Genome shuffling enhances stress tolerance of Zymomonas mobilis to two inhibitors

Energy and nutrient recovery from agro-wastes: Rethinking their potential possibilities

Economic Aspects and Sustainability of Ethanol Production—A Systematic Literature Review

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