2017
DOI: 10.3390/fermentation3020023
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Continuous Ethanol Production from Synthesis Gas by Clostridium ragsdalei in a Trickle-Bed Reactor

Abstract: A trickle-bed reactor (TBR) when operated in a trickle flow regime reduces liquid resistance to mass transfer because a very thin liquid film is in contact with the gas phase and results in improved gas-liquid mass transfer compared to continuous stirred tank reactors (CSTRs). In the present study, continuous syngas fermentation was performed in a 1-L TBR for ethanol production by Clostridium ragsdalei. The effects of dilution and gas flow rates on product formation, productivity, gas uptakes and conversion ef… Show more

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Cited by 52 publications
(22 citation statements)
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“…Also, advanced strategies for distillation to keep the energy balance of the entire process positive are required. Continuous ethanol production from syngas by Clostridium ragsdalei in a trickle-bed reactor was studied by Devarapalli et al [77]. Their results showed that CO and H 2 conversion efficiencies reached over 90%.…”
Section: Bio-ethanol Productionmentioning
confidence: 99%
“…Also, advanced strategies for distillation to keep the energy balance of the entire process positive are required. Continuous ethanol production from syngas by Clostridium ragsdalei in a trickle-bed reactor was studied by Devarapalli et al [77]. Their results showed that CO and H 2 conversion efficiencies reached over 90%.…”
Section: Bio-ethanol Productionmentioning
confidence: 99%
“…The reactor types presented in Fig. have been investigated in various laboratory studies , , . A detailed overview of these studies describing reactor type, operational conditions and results is given in the Supporting Information (Tab.…”
Section: Bioreactor Concepts For Syngas Fermentationmentioning
confidence: 99%
“…Two-stage CSTR fermenters have been operated with the first CSTR configured to promote growth of the acetogenic culture with acid production and the second CSTR operated at low pH under nutrient limitation and low gas conversion to achieve high ethanol concentration [100]. Column fermenters that show promise include a bubble column with a ceramic monolith to support biofilm [84], a trickle bed with biofilm [87,101,102] and a biofilm supported on a hollow fiber membrane for gas dispersion [86,87]. Biofilms retain cells, but long-term mass transfer and fouling may limit application.…”
Section: Reactor Designmentioning
confidence: 99%