Extremophiles in biofuel synthesis

Barnard, Desiré; Casanueva, Ana; Tuffin, Marla; Cowan, Don A.

doi:10.1080/09593331003710236

Cited by 129 publications

(82 citation statements)

References 200 publications

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“…118 The UK-based company Green Biologics (www.greenbiologics.com) uses a mixture of thermophiles and thermostable enzymes for the production of butanol from waste biomass which is commercially sold as Butafuel™. 204 Recently, the citramalate synthase (CimA) from the extremophile Methanococcus jannaschii was found to increase the activity over a temperature range of 30 °C to 70 °C and overexpressed in E.…”

Section: Extremophiles In Biofuel Synthesismentioning

confidence: 99%

“…204 Knowing the fact that most microorganisms are unable to grow at butanol concentrations above 2%; there are certain species of Bacillus and Pseudomonas that are able to tolerate butanol concentrations as high as 2.5-7%. [205][206][207] Pseudomonas achieves high solvent tolerance by removal of solvent using efflux pumps and physico-chemical changes in their membrane lipids.…”

Section: Extremophiles In Biofuel Synthesismentioning

confidence: 99%

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Biobutanol: the outlook of an academic and industrialist

et al. 2013

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The gradual shift of transportation fuels from oil based fuels to the alternative fuel resources and worldwide demand for energy has been the impetus for research to produce alcohol biofuels from renewable resources. Current bioethanol and biodiesel can, however, not cover an increasing demand for biofuels. Hence, there is an extensive need for advanced biofuels with superior fuel properties. The present review is focused on the developments of biobutanol, which is regarded to be superior to bioethanol in terms of energy density and hygroscopicity. Although acetone-butanolethanol (ABE) fermentation is one of the oldest large-scale fermentation processes, butanol yield by anaerobic fermentation remains sub-optimal. For sustainable industrial scale butanol production, a number of obstacles need to be addressed including choice of feedstock, low product yield, product toxicity to production strain, multiple end-products and downstream processing of alcohol mixtures.Metabolic engineering provides a means for fermentation improvements. Different strategies are employed in the metabolic engineering of Clostridia that aim to enhance the solvent production, improve selectivity for butanol production, and increase the tolerance of Clostridia to solvents. The introduction and expression of a non-clostridial butanol producing pathway in E. coli is most promising strategy for butanol biosynthesis. Several rigorous kinetic and physiological models for fermentation have been formulated, which form useful tool for optimization of the process. Due to the lower butanol titers in the fermentation broth, simultaneous fermentation and product removal techniques have been developed to improve production economics. With the use of new strains, inexpensive substrates, and superior reactor designs, economic ABE fermentation may further attract an attention of researchers all over the world. The present review is attempting to provide an overall outlook on discoveries and strategies that are being developed for commercial n-butanol production.

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Section: Extremophiles In Biofuel Synthesismentioning

confidence: 99%

Section: Extremophiles In Biofuel Synthesismentioning

confidence: 99%

Biobutanol: the outlook of an academic and industrialist

et al. 2013

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“…Another group of organisms with great CBP potential is from the genus Geobacillus. These are thermophilic bacilli with certain species being able to ferment sugars like glucose, xylose and arabinose at temperatures of between 55 and 70⁰C, producing a mixture of lactate, formate, acetate and ethanol (Barnard et al, 2010). Certain species like Geobacillus R7 also have the ability to produce lignocellulose-degrading enzymes including cellulases, xylanases and lignases.…”

Section: Prokaryotic Cellulolytic Organisms For Cbpmentioning

confidence: 99%

Developing Organisms for Consolidated Bioprocessing of Biomass to Ethanol

Zyl¹,

Haan²,

Grange³

2011

Biofuel Production-Recent Developments and Prospects

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“…The established methods utilize monomeric sugars or their polysaccharide reserves which are also required for human foods. Considerable efforts are being done worldwide to develop cost-competitive processes for biofuel production [8]. For the secondgeneration biofuels, lignocellulosic materials especially those representing agro-industrial wastes are being advocated on one hand, while it is also claimed that compared to mesophilic conditions, thermophiles display higher potential for ethanologenic fermentation [9] and higher hydrogen production due to thermodynamic advantages with decreased processes' costs by reducing input energy [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Thermophilic fermentations of lignocellulosic substrates and economics of biofuels: prospects in Pakistan

Ahmad

Qazi

2014

Int J Energy Environ Eng

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Climatic vicissitudes have laid further stress on already dwindling fossil fuels. In response to the emerging energy needs, biofuels can be considered as the safest and sustainable energy resources. At present, ethanol fermentations have been successful in fueling motor vehicles in some countries. However, with the existing population dynamic, obtaining ethanol from food competing resources/commodities might not be a desirable option. Therefore, non-food competing second-generation biofuels are the right choice to accommodate the increasing energy demand.

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Extremophiles in biofuel synthesis

Cited by 129 publications

References 200 publications

Biobutanol: the outlook of an academic and industrialist

Biobutanol: the outlook of an academic and industrialist

Developing Organisms for Consolidated Bioprocessing of Biomass to Ethanol

Thermophilic fermentations of lignocellulosic substrates and economics of biofuels: prospects in Pakistan

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