Strategic, Economic, and Environmental Issues for Transportation Fuels

Putsche, V.; Sandor, Debra

doi:10.1201/9780203752456-2

Cited by 2 publications

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“…Interest in its use has increased to the extent that governments seek to reduce and even eliminate dependence on fossil fuels, to ensure future, greater energy security, while benefiting the environment. Considering that oil accounts for 97% of the energy used for transport and industry [2], governments around the world have actively promoted the identification, development and commercialization of technologies for the production of alternative fuels in the last 20 years [3], including the production of ethanol [4].…”

Section: Introductionmentioning

confidence: 99%

Isolation and characterization of Saccharomyces species for bioethanol production from sugarcane molasses: Studies of scale up in bioreactor

et al. 2016

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a b s t r a c tDecreases in oil reserves and gas fields around all over the world justify the deepening of studies to render viable the larger-scale use of new energy sources. Therefore, the use of microorganisms to convert sugars into ethanol is a feasible process to be performed in a short period of time and at low costs. In this context, this study aimed to select ethanol-producing yeasts, after isolating samples in molasses obtained from companies in the Province of Tucum an (Argentina) and grapes obtained from farms located in Cafayate (Salta, Argentina). Among the twenty-nine samples studied A2, A10 and A11 isolates showed higher ethanol productions of 12.87; 13.64 and 13.46% respectively. A2 showed a homogeneous growth meanwhile the growth of strains A10 and A11 was flocculent. Molecular taxonomic characterization of these isolates showed a percentage of similarity of 100% with the strain Saccharomyces cerevisiae. The behavior of the non-flocculent A2 strain at laboratory scale was faster using a sugarcane molasses based medium, reaching 11.36% ethanol without adding nutrients and other growth factors, probably because its disperse form facilitates the transfer of nutrients and products. These values were improved to 12.02% when the process was scaled up to a 10L bioreactor. All these studies allowed concluding that S. cerevisiae A2 strain is a promising microorganism for the production of bioethanol with potential environmental, energy and economic benefits to be projected into industrial scale.

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Section: Introductionmentioning

confidence: 99%

Isolation and characterization of Saccharomyces species for bioethanol production from sugarcane molasses: Studies of scale up in bioreactor

et al. 2016

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“…Its oxygen content helps gasoline bum more efficiently, cutting tailpipe pollutants including carbon monoxide and benzene. Even the addition o f 10% ethanol to conventional gasoline can cut carbon monoxide emissions by 20%, benzene emissions by 25% and overall gasoline toxicity by 30% (Putsche and Sandor, 1996). Bioethanol is not only a possible altemative to a looming energy crisis, it holds the key to a likely solution as well (Szengyel, 2000).…”

Section: Chapter 1 -Introductionmentioning

confidence: 99%

Enzymatic Hydrolysis of Wheat Straw in a Stirred-Tank Reactor

Khan¹

2021

Preprint

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In an attempt to elucidate the effect of some operating conditions on the rate and extent of enzymatic hydrolysis of lignocellulosic materials in a stirred tank reactor, wheat straw was hydrolyzed by mixing with two pitched-blade impellers mounted on a shaft under various atmospheric conditions: static air in headspace, N₂ gas flowing over the surface of the medium, and minimal static air by a lid touching the surface of the medium. The presence of N₂ gas over the reaction medium produced by the highest 6.9 % (w/w) conversion in 36 hours. The initial conversion when N₂ gas flowed in the headspace (2.9 % w/w), and when a lid was used (2.9 % w/w) as compared to conversion in air presence (2.3 % w/w), seems to indicate that the enzyme activity was affected due to oxidation in the presence of air. The observed low conversion yield was probably the result of the non sterile conditions imposed by industrial requirements for the production of biofuel ethanol from agricultural lignocellulosics.

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Strategic, Economic, and Environmental Issues for Transportation Fuels

Cited by 2 publications

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Isolation and characterization of Saccharomyces species for bioethanol production from sugarcane molasses: Studies of scale up in bioreactor

Isolation and characterization of Saccharomyces species for bioethanol production from sugarcane molasses: Studies of scale up in bioreactor

Enzymatic Hydrolysis of Wheat Straw in a Stirred-Tank Reactor

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