Stripping of ethanol with CO2 in bubble columns: Effects of operating conditions and modeling

Silva, C.R.; Esperança, Mateus N.; Cruz, Antonio José Gonçalves; Moura, Luiz Fernando de; Badino, Alberto Colli

doi:10.1016/j.cherd.2015.06.022

Cited by 22 publications

(13 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This technique has been mainly studied for bio‐fuels extraction, particularly in the acetone–butanol–ethanol (ABE) extractive fermentation, showing high potential in reducing product inhibition and increasing yields 13,77‐81 . Chen et al .…”

Section: In Situ Product Recoverymentioning

confidence: 99%

“…For instance, the use of oleyl alcohol (OA) coupled with nitrogen gas was explored as an extractive hybrid technique for butanol trapping during batch fermentation of Clostridium acetobutylicum , obtaining a near‐twofold increase for butanol production and glucose comsuption 84 . Some studies have addressed gas stripping using mathematical modeling, suggesting that this strategy could facilitate process design by more accurate behavior and yield prediction under certain parameters and assumptioms 76,77 This modeling strategy brings new opportunities for further optimization not only for this technique but also for the others previously mentioned here. By selecting critical factors and adequate physicochemical parameters, mathematical modeling and surface response could be useful tools for cutting time and costs in bioprocess design.…”

Section: In Situ Product Recoverymentioning

confidence: 99%

See 1 more Smart Citation

In situ product recovery as a strategy for bioprocess integration and depletion of inhibitory products

Salas-Villalobos

Gómez-Acata

Castillo-Reyna

et al. 2021

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

Microbial growth inhibition by end‐products is an undesirable behavior that causes low yields and reduces the overall productivity and feasibility of fermentative bioprocesses. Classic downstream processing techniques have been explored widely to attenuate this behavior by integrating them with the upstream operations. These in situ extraction techniques appear as an attractive alternative to increase titers and consequently total recovery and/or purification. This also reduces the number of downstream operations and thus the time and final cost of the bioprocess. In the present work, process integration at the earliest stage of a bioprocess – the bioreactor – is presented as an attractive strategy to facilitate primary recovery and in some cases to overcome end‐product microbial inhibition. A careful revision of selected strategies, from classical to hybrid techniques for in situ product recovery, is presented along with pros and cons, to give the reader a general overview of different experimental strategies and selection criteria that can be generally applied to different bioproducts/bioprocesses. © 2021 Society of Chemical Industry (SCI).

show abstract

Section: In Situ Product Recoverymentioning

confidence: 99%

Section: In Situ Product Recoverymentioning

confidence: 99%

In situ product recovery as a strategy for bioprocess integration and depletion of inhibitory products

Salas-Villalobos

Gómez-Acata

Castillo-Reyna

et al. 2021

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

show abstract

“…99.5%~99.8% N 2 was verified to be the preferable type of gas in gas stripping ethanol fermentation (GSEF) where the ethanol and glycerol productivity increased by about two times than that of the control. Besides the nature of the gas, other operating conditions have been reported to affect gas stripping performance, such as feed temperature, stripping gas temperature, specific stripping gas flow rate, and liquid height-to-column diameter ratio (h/D) [50]. Despite its advantages, gas stripping technology has not received significant interest and has only been reported in a limited number of studies summarized in Table 2.…”

Section: Gas Strippingmentioning

confidence: 99%

Overview of Alternative Ethanol Removal Techniques for Enhancing Bioethanol Recovery from Fermentation Broth

et al. 2019

View full text Add to dashboard Cite

This study aims at reviewing the alternative techniques for bioethanol recovery, highlighting its advantages and disadvantages, and to investigate the technical challenges facing these alternatives to be widely used. The findings showed that the integration of these techniques with the fermentation process did not meet a large acceptance in the industrial sector. The majority of conducted studies were mainly focusing on ethanol recovery from aqueous standard solution rather than the investigation of these techniques performance in fermentation-separation coupled system. In this context, pervaporation has received more attention as a promising alternative to distillation. However, some challenges are facing the integration of these techniques in the industrial scale as the fouling problem in pervaporation, the toxicity of solvent in liquid extraction, energy consumption in vacuum fermentation. It was also found that there is a lack of the technical economic analysis for these techniques which may limit the spread of its application in the large scale. Currently, hybrid systems integrating distillation with other alternative techniques are considered as an innovative solution to reduce the high cost of the distillation process and the low separation efficiency of the alternatives techniques.

show abstract

“…Accumulated ethanol during yeast fermentation is main toxic compound, slowing down yeast growth and ethanol production, resulting therefore in low final ethanol titers of about 8 to 9% (v/v). Semantic quantity of energy for ethanol recovery and large fermentation tanks are required, while also generating large amounts of vinasse (Silva et al, 2015;Sonego et al, 2016). Industrial fed-batch ethanol fermentation starts with 25-30% inoculum, resulting compared to conventional batch mode in a higher ethanol concentration due to reduction of sugar inhibitory effect on S. cerevisiae growth and ethanol production during first stages of fermentation process (Sonego et al, 2016).…”

Section: St Generation Biofuels (Biodiesel Bioethanol Pure Plantmentioning

confidence: 99%

“…Extractive fedbatch fermentation with 2.5 vvm CO2 stripping at 34.0°C has been reported to overcome inhibitory effect of ethanol, wherein ethanol is removed during the fermentation process, resulting in 33% higher ethanol concentration of 110.3 g/L and 9.2 g/(L*h) productivity from 240 g/L substrate (Sonego et al, 2016). Using a 5 liter bubble column fermenter, temperature and entrainment factor were positively affected by the starting temperature and specific flow rate of carbon dioxide, and negatively by the ratio between the height and the diameter (Silva et al, 2015). Taylor et al (1995) described a continuous fermenter/stripper process with heat recovery as a lower-cost alternative to conventional fermentation and distillation, reducing heating and cooling costs.…”

Section: St Generation Biofuels (Biodiesel Bioethanol Pure Plantmentioning

confidence: 99%

Historical Developments in Carbon Sources, Biomass, Fossils, Biofuels and Biotechnology Review Article

Anastassiadis

2016

World J. Biol. Biotechnol.

View full text Add to dashboard Cite

Since early human history and existence energy rich plants, wood and forest cellulosic material have been used for fire, light, heating, cooking and other daily activities. Fossil energy was the foundation of our modern society and industrialization since last two centuries, while exploration and exploitation of oil reserves and petrochemistry have largely shaped 20th century. Increasing concerns on environmental pollution, accelerated global warming, and global climate changes, continuing world's crude oil (fossil fuels) consumption and depletion, as well as energy security and energy crisis caused by daily burning large amounts of fossil fuels, led to the attraction, search and development of renewable, carbon-neutral, economically viable alternative energy sources, such as biofuels, slowly displacing petroleum fuels. In continuously growing human population reaching about 10 billion in 2050, various renewable energy sources are promoted and developed, to ensure rising energy demands in a world running out of fossil energy sources. Biofuels are produced from any kind of available biomass and categorized based on utilized carbon resources into first-, second- and third-generation. Nevertheless, biofuels’ future outlook is though beset by uncertainty. Hereby, various issues and concerns related to fossils and renewable biofuels are described and analyzed in present review article.

show abstract

Stripping of ethanol with CO2 in bubble columns: Effects of operating conditions and modeling

Cited by 22 publications

References 29 publications

In situ product recovery as a strategy for bioprocess integration and depletion of inhibitory products

In situ product recovery as a strategy for bioprocess integration and depletion of inhibitory products

Overview of Alternative Ethanol Removal Techniques for Enhancing Bioethanol Recovery from Fermentation Broth

Historical Developments in Carbon Sources, Biomass, Fossils, Biofuels and Biotechnology Review Article

Contact Info

Product

Resources

About