Challenges in bioethanol production from food residues

Bender, Leticia Eduarda; Lopes, Samuel Teixeira; Gomes, Karolynne Sousa; Devos, Rafaela Julyana Barboza; Colla, Luciane Maria

doi:10.1016/j.biteb.2022.101171

Cited by 15 publications

(10 citation statements)

References 104 publications

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“…The use of biofuels as an alternative to conventional fossil fuels effectively reduces the emissions of carbon, nitrogen, and sulfur oxides [117]. One of the most promising strategies for emission reduction is switching to renewable energy sources (plant-based fuels in particular: biodiesel, biokerosene, bioethanol, and biogasoline) [118,119]. The micro-explosions of twoliquid droplets can make biofuel production more effective.…”

Section: Applications Involving Micro-explosive Breakupmentioning

confidence: 99%

Physical and Mathematical Models of Micro-Explosions: Achievements and Directions of Improvement

Antonov,

Fedorenko,

Yanovskiy

et al. 2023

Energies

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The environmental, economic, and energy problems of the modern world motivate the development of alternative fuel technologies. Multifuel technology can help reduce the carbon footprint and waste from the raw materials sector as well as slow down the depletion of energy resources. However, there are limitations to the active use of multifuel mixtures in real power plants and engines because they are difficult to spray in combustion chambers and require secondary atomization. Droplet micro-explosion seems the most promising secondary atomization technology in terms of its integral characteristics. This review paper outlines the most interesting approaches to modeling micro-explosions using in-house computer codes and commercial software packages. A physical model of a droplet micro-explosion based on experimental data was analyzed to highlight the schemes and mathematical expressions describing the critical conditions of parent droplet atomization. Approaches are presented that can predict the number, sizes, velocities, and trajectories of emerging child droplets. We also list the empirical data necessary for developing advanced fragmentation models. Finally, we outline the main growth areas for micro-explosion models catering for the needs of spray technology.

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Section: Applications Involving Micro-explosive Breakupmentioning

confidence: 99%

Physical and Mathematical Models of Micro-Explosions: Achievements and Directions of Improvement

Antonov,

Fedorenko,

Yanovskiy

et al. 2023

Energies

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“…Addressing these challenges is crucial to maximising microbial bioethanol production's efficiency, yield, and economic viability, ultimately advancing its potential as a renewable and ecofriendly alternative to fossil fuels. Although various substrates of sugar origin can be utilised as feedstock, because of the challenges associated with these substrates' availability, the use of cellulosic and other agro waste has become the only option (Bender, et al, 2022). Corncob is a significant feedstock for bioethanol production due to its various benefits.…”

Section: Introductionmentioning

confidence: 99%

Microbial bioethanol production from locally sourced corncobs through saccharification and fermentation using Aspergillus niger and Saccharomyces cerevisiae

Aysha Umar Farouq,

Salisu

2023

USci

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The utilization of agricultural residues, specifically corncobs, as a renewable feedstock for bioethanol production holds promise in sustainable energy generation. This study investigates the feasibility of microbial bioethanol production from locally sourced corncobs through co-digestion involving Aspergillus niger and Saccharomyces cerevisiae. The process involved washing the corncobs, grinding them, and then hydrolyzing the corncob flour with cultured Aspergillus niger. The resulting sugar syrup was then fermented with Saccharomyces cerevisiae to produce ethanol. The process was optimized to obtain the highest ethanol yield. The results indicated that the process developed achieved a maximum ethanol yield of 33.2, 36.7, and 45.5% from the triplicate digesters used with a percentage purity in the range of 62.06% to 87.69% and a mean volume of ethanol recovery of 145 mL per 400 mL of the fermented product. This yield was obtained when the temperature of the hydrolysis using inoculum and saccharification were maintained at 27 °C. Additionally, the optimal substrate concentration for maximum ethanol yield was found to be 50 % (w/v). The study demonstrates the potential of corncobs obtained from local mashing as a source of fermentable sugars for the microbial production of bioethanol. Additionally, the results provide a basis for the development of an efficient and economically feasible process for production of bioethanol from corncobs obtained from local mashing.

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“…Bioethanol (CH 3 CH 2 OH) is a clean, safe, and renewable biofuel [6], produced from lignocellulosic biomass due to its low cost and easy availability [7,8], in addition to its low consumption of water, chemical reagents, and yeast, which lowers the conversion cost [9,10]. Its addition to conventional gasoline (at a ratio of 5-25%) has been regularly employed in Europe and the United States [11,12].…”

Section: Introductionmentioning

confidence: 99%

Acquisition, Characterization, and Optimization of Distilled Bioethanol Generated from Fermented Carrot (Daucus carota) Residues

Palacios-Velásquez,

Quispe-Coquil,

Casimiro-Soriano

et al. 2023

Fermentation

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Bioethanol is a liquid biofuel produced from the digestion of biomass and usable waste of organic origin. The objective of this research was to obtain bioethanol from carrot (Daucus carota) residues of the Peruvian Chantenay variety, with a high content of lignocellulosic substances. The in-batch process method of enzymatic hydrolysis, with Aspergillus niger amyloglucosidase, and fermentation, with Saccharomyces cerevisiae yeast, was applied. The ferment was steam distilled and chemically characterized. The process was evaluated by controlling pH and enzyme/yeast mass ratio through the response surface optimization. The optimum conditions for the best values of TSS and % ethanol content for the distilled product were a time of 300 min, yeast/enzyme mass ratio of 24.0, and pH of 4.98. The results showed a significant decrease in sugars in the hydrolysis and fermentation stages, optimum alcohol content in the distilled product of 92.48% (v/v), lower organic compound content, and net calorific value of 23.82 MJ/kg, which is higher than those reported in the literature.

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Challenges in bioethanol production from food residues

Cited by 15 publications

References 104 publications

Physical and Mathematical Models of Micro-Explosions: Achievements and Directions of Improvement

Physical and Mathematical Models of Micro-Explosions: Achievements and Directions of Improvement

Microbial bioethanol production from locally sourced corncobs through saccharification and fermentation using Aspergillus niger and Saccharomyces cerevisiae

Acquisition, Characterization, and Optimization of Distilled Bioethanol Generated from Fermented Carrot (Daucus carota) Residues

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