Enhancing methane oxidation in a bioelectrochemical membrane reactor using a soluble electron mediator
Abstract Background Bioelectrochemical methane oxidation catalysed by anaerobic methanotrophic archaea (ANME) is constrained by limited methane bioavailability as well as by slow kinetics of extracellular electron transfer (EET) of ANME. In this study, we tested a combination of two strategies to im...
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| Format: | Article |
| Language: | English |
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BMC
2020-10-01
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| Series: | Biotechnology for Biofuels |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1186/s13068-020-01808-7 |
| _version_ | 1828839774384816128 |
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| author | Xueqin Zhang Hesamoddin Rabiee Joshua Frank Chen Cai Terra Stark Bernardino Virdis Zhiguo Yuan Shihu Hu |
| author_facet | Xueqin Zhang Hesamoddin Rabiee Joshua Frank Chen Cai Terra Stark Bernardino Virdis Zhiguo Yuan Shihu Hu |
| author_sort | Xueqin Zhang |
| collection | DOAJ |
| description | Abstract Background Bioelectrochemical methane oxidation catalysed by anaerobic methanotrophic archaea (ANME) is constrained by limited methane bioavailability as well as by slow kinetics of extracellular electron transfer (EET) of ANME. In this study, we tested a combination of two strategies to improve the performance of methane-driven bioelectrochemical systems that includes (1) the use of hollow fibre membranes (HFMs) for efficient methane delivery to the ANME organisms and (2) the amendment of ferricyanide, an effective soluble redox mediator, to the liquid medium to enable electrochemical bridging between the ANME organisms and the anode, as well as to promote EET kinetics of ANME. Results The combined use of HFMs and the soluble mediator increased the performance of ANME-based bioelectrochemical methane oxidation, enabling the delivery of up to 196 mA m−2, thereby outperforming the control system by 244 times when HFMs were pressurized at 1.6 bar. Conclusions Improving methane delivery and EET are critical to enhance the performance of bioelectrochemical methane oxidation. This work demonstrates that by process engineering optimization, energy recovery from methane through its direct oxidation at relevant rates is feasible. |
| first_indexed | 2024-12-12T19:29:17Z |
| format | Article |
| id | doaj.art-6fe42f3a08034ef584a64ca9d05fdb17 |
| institution | Directory Open Access Journal |
| issn | 1754-6834 |
| language | English |
| last_indexed | 2024-12-12T19:29:17Z |
| publishDate | 2020-10-01 |
| publisher | BMC |
| record_format | Article |
| series | Biotechnology for Biofuels |
| spelling | doaj.art-6fe42f3a08034ef584a64ca9d05fdb172022-12-22T00:14:27ZengBMCBiotechnology for Biofuels1754-68342020-10-0113111210.1186/s13068-020-01808-7Enhancing methane oxidation in a bioelectrochemical membrane reactor using a soluble electron mediatorXueqin Zhang0Hesamoddin Rabiee1Joshua Frank2Chen Cai3Terra Stark4Bernardino Virdis5Zhiguo Yuan6Shihu Hu7Advanced Water Management Centre, Faculty of Engineering, Architecture and Information Technology, The University of QueenslandAdvanced Water Management Centre, Faculty of Engineering, Architecture and Information Technology, The University of QueenslandAdvanced Water Management Centre, Faculty of Engineering, Architecture and Information Technology, The University of QueenslandAdvanced Water Management Centre, Faculty of Engineering, Architecture and Information Technology, The University of QueenslandAustralian Institute for Bioengineering and Nanotechnology, The University of QueenslandAdvanced Water Management Centre, Faculty of Engineering, Architecture and Information Technology, The University of QueenslandAdvanced Water Management Centre, Faculty of Engineering, Architecture and Information Technology, The University of QueenslandAdvanced Water Management Centre, Faculty of Engineering, Architecture and Information Technology, The University of QueenslandAbstract Background Bioelectrochemical methane oxidation catalysed by anaerobic methanotrophic archaea (ANME) is constrained by limited methane bioavailability as well as by slow kinetics of extracellular electron transfer (EET) of ANME. In this study, we tested a combination of two strategies to improve the performance of methane-driven bioelectrochemical systems that includes (1) the use of hollow fibre membranes (HFMs) for efficient methane delivery to the ANME organisms and (2) the amendment of ferricyanide, an effective soluble redox mediator, to the liquid medium to enable electrochemical bridging between the ANME organisms and the anode, as well as to promote EET kinetics of ANME. Results The combined use of HFMs and the soluble mediator increased the performance of ANME-based bioelectrochemical methane oxidation, enabling the delivery of up to 196 mA m−2, thereby outperforming the control system by 244 times when HFMs were pressurized at 1.6 bar. Conclusions Improving methane delivery and EET are critical to enhance the performance of bioelectrochemical methane oxidation. This work demonstrates that by process engineering optimization, energy recovery from methane through its direct oxidation at relevant rates is feasible.http://link.springer.com/article/10.1186/s13068-020-01808-7Bioelectrochemical membrane reactorRedox mediatorBioelectrochemical methane oxidationANMEFerricyanide |
| spellingShingle | Xueqin Zhang Hesamoddin Rabiee Joshua Frank Chen Cai Terra Stark Bernardino Virdis Zhiguo Yuan Shihu Hu Enhancing methane oxidation in a bioelectrochemical membrane reactor using a soluble electron mediator Biotechnology for Biofuels Bioelectrochemical membrane reactor Redox mediator Bioelectrochemical methane oxidation ANME Ferricyanide |
| title | Enhancing methane oxidation in a bioelectrochemical membrane reactor using a soluble electron mediator |
| title_full | Enhancing methane oxidation in a bioelectrochemical membrane reactor using a soluble electron mediator |
| title_fullStr | Enhancing methane oxidation in a bioelectrochemical membrane reactor using a soluble electron mediator |
| title_full_unstemmed | Enhancing methane oxidation in a bioelectrochemical membrane reactor using a soluble electron mediator |
| title_short | Enhancing methane oxidation in a bioelectrochemical membrane reactor using a soluble electron mediator |
| title_sort | enhancing methane oxidation in a bioelectrochemical membrane reactor using a soluble electron mediator |
| topic | Bioelectrochemical membrane reactor Redox mediator Bioelectrochemical methane oxidation ANME Ferricyanide |
| url | http://link.springer.com/article/10.1186/s13068-020-01808-7 |
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