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Biological methanation of CO2 in a novel biofilm plug-flow reactor: A high rate and low parasitic energy process.

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Title: Biological methanation of CO2 in a novel biofilm plug-flow reactor: A high rate and low parasitic energy process.
Authors: Savvas, Savvas1, Donnelly, Joanne1, Patterson, Tim1, Esteves, Sandra R.1, Chong, Zyh S.2
Source: Applied Energy. Sep2017, Vol. 202, p238-247. 10p.
Subjects: Methanation, Biofilms testing, Tubular reactors, Renewable energy sources, Anaerobic reactors
Abstract: The performance of a novel biofilm plug flow reactor containing a mixed anaerobic microbial culture was investigated for the conversion of CO 2 /H 2 to CH 4 . Unlike conventional gas-liquid contactors that depend on agitation, gas diffusion was decoupled from power consumption for mixing by increasing the gas phase inside the reaction space whilst increasing the gas residence time. The mixed mesophilic culture exhibited good biofilm formation and metabolic activity. Within 82 days of operation, 99% and 90% CH 4 conversion efficiencies were achieved at total gas throughputs of 100 and 150 v/v/d, respectively. At a gas input rate of 230 v/v/d, methane evolution rates reached 40 v/v/d, which are the highest to date achieved by fixed film biomethanation systems. Significant gas transfer related parasitic energy savings can be achieved when using the novel plug flow design as compared to a CSTR. The results and modelling parameters of the study can aid the development of high rate, low parasitic energy biological methanation technologies for biogas upgrading and renewable power conversion and storage systems. The study has also established a reactor system which has the potential of accelerating biotechnology developments and deployment of other novel C1 gas routes to low carbon products. [ABSTRACT FROM AUTHOR]
Copyright of Applied Energy is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 124249179
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: <searchLink fieldCode="JN" term="%22Applied+Energy%22">Applied Energy</searchLink>. Sep2017, Vol. 202, p238-247. 10p.
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  Data: <searchLink fieldCode="DE" term="%22Methanation%22">Methanation</searchLink><br /><searchLink fieldCode="DE" term="%22Biofilms+testing%22">Biofilms testing</searchLink><br /><searchLink fieldCode="DE" term="%22Tubular+reactors%22">Tubular reactors</searchLink><br /><searchLink fieldCode="DE" term="%22Renewable+energy+sources%22">Renewable energy sources</searchLink><br /><searchLink fieldCode="DE" term="%22Anaerobic+reactors%22">Anaerobic reactors</searchLink>
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  Label: Abstract
  Group: Ab
  Data: The performance of a novel biofilm plug flow reactor containing a mixed anaerobic microbial culture was investigated for the conversion of CO 2 /H 2 to CH 4 . Unlike conventional gas-liquid contactors that depend on agitation, gas diffusion was decoupled from power consumption for mixing by increasing the gas phase inside the reaction space whilst increasing the gas residence time. The mixed mesophilic culture exhibited good biofilm formation and metabolic activity. Within 82 days of operation, 99% and 90% CH 4 conversion efficiencies were achieved at total gas throughputs of 100 and 150 v/v/d, respectively. At a gas input rate of 230 v/v/d, methane evolution rates reached 40 v/v/d, which are the highest to date achieved by fixed film biomethanation systems. Significant gas transfer related parasitic energy savings can be achieved when using the novel plug flow design as compared to a CSTR. The results and modelling parameters of the study can aid the development of high rate, low parasitic energy biological methanation technologies for biogas upgrading and renewable power conversion and storage systems. The study has also established a reactor system which has the potential of accelerating biotechnology developments and deployment of other novel C1 gas routes to low carbon products. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Applied Energy is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.apenergy.2017.05.134
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      – Code: eng
        Text: English
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        PageCount: 10
        StartPage: 238
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        Type: general
      – SubjectFull: Biofilms testing
        Type: general
      – SubjectFull: Tubular reactors
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      – SubjectFull: Renewable energy sources
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      – SubjectFull: Anaerobic reactors
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              Text: Sep2017
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