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  1. Article: Fluid-like cathode enhances valuable biomass production from brewery wastewater in purple phototrophic bacteria.

    Manchon, Carlos / Asensio, Yeray / Muniesa-Merino, Fernando / Llorente, María / Pun, Álvaro / Esteve-Núñez, Abraham

    Frontiers in microbiology

    2023  Volume 14, Page(s) 1115956

    Abstract: The climate crisis requires rethinking wastewater treatment to recover resources, such as nutrients and energy. In this scenario, purple phototrophic bacteria (PPB), the most versatile microorganisms on earth, are a promising alternative to transform the ...

    Abstract The climate crisis requires rethinking wastewater treatment to recover resources, such as nutrients and energy. In this scenario, purple phototrophic bacteria (PPB), the most versatile microorganisms on earth, are a promising alternative to transform the wastewater treatment plant concept into a biorefinery model by producing valuable protein-enriched biomass. PPB are capable of interacting with electrodes, exchanging electrons with electrically conductive materials. In this work, we have explored for mobile-bed (either stirred or fluidized) cathodes to maximize biomass production. For this purpose, stirred-electrode reactors were operated with low-reduced (3.5 e
    Language English
    Publishing date 2023-03-13
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2587354-4
    ISSN 1664-302X
    ISSN 1664-302X
    DOI 10.3389/fmicb.2023.1115956
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Microbial Electrochemical Fluidized Bed Reactor: A Promising Solution for Removing Pollutants From Pharmaceutical Industrial Wastewater.

    Asensio, Yeray / Llorente, María / Sánchez-Gómez, Alejandro / Manchon, Carlos / Boltes, Karina / Esteve-Núñez, Abraham

    Frontiers in microbiology

    2021  Volume 12, Page(s) 737112

    Abstract: The capacity of electroactive bacteria to exchange electrons with electroconductive materials has been explored during the last two decades as part of a new field called electromicrobiology. Such microbial metabolism has been validated to enhance the ... ...

    Abstract The capacity of electroactive bacteria to exchange electrons with electroconductive materials has been explored during the last two decades as part of a new field called electromicrobiology. Such microbial metabolism has been validated to enhance the bioremediation of wastewater pollutants. In contrast with standard materials like rods, plates, or felts made of graphite, we have explored the use of an alternative strategy using a fluid-like electrode as part of a microbial electrochemical fluidized bed reactor (ME-FBR). After verifying the low adsorption capacity of the pharmaceutical pollutants on the fluid-bed electrode [7.92 ± 0.05% carbamazepine (CBZ) and 9.42 ± 0.09% sulfamethoxazole (SMX)], our system showed a remarkable capacity to outperform classical solutions for removing pollutants (more than 80%) from the pharmaceutical industry like CBZ and SMX. Moreover, the ME-FBR performance revealed the impact of selecting an anode potential by efficiently removing both pollutants at + 200 mV. The high TOC removal efficiency also demonstrated that electrostimulation of electroactive bacteria in ME-FBR could overcome the expected microbial inhibition due to the presence of CBZ and SMX. Cyclic voltammograms revealed the successful electron transfer between microbial biofilm and the fluid-like electrode bed throughout the polarization tests. Finally,
    Language English
    Publishing date 2021-11-26
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2587354-4
    ISSN 1664-302X
    ISSN 1664-302X
    DOI 10.3389/fmicb.2021.737112
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Algal biomass as fuel for stacked‐MFCs for profitable, sustainable and carbon neutral bioenergy generation

    Asensio, Yeray / Carmen Fernandez‐Marchante / Jose Villaseñor / Justo Lobato / Pablo Cañizares / Manuel A Rodrigo

    Journal of chemical technology and biotechnology. 2018 Jan., v. 93, no. 1

    2018  

    Abstract: BACKGROUND: This work compares the performance of three stacked microbial fuel cells constructed with different number of single‐MFC (MFC₁ with two stacked‐MFCs, MFC₂ with ten stacked‐MFCs and MFC₃ with twenty stacked‐MFCs), and operated ... ...

    Abstract BACKGROUND: This work compares the performance of three stacked microbial fuel cells constructed with different number of single‐MFC (MFC₁ with two stacked‐MFCs, MFC₂ with ten stacked‐MFCs and MFC₃ with twenty stacked‐MFCs), and operated under the same conditions for one month. RESULTS: According to results, algae suspensions can be used as fuel for MFC‐stacks, although current efficiencies obtained are low. In comparing the effect of number of cells stacked on the performance of the stacks, it was found that the higher the number of cells stacked, the higher the energy harvested from algae. However, because of the very efficient consumption of COD in the first MFC of the stacks (not only by electrogenic but also by non‐electrogenic microorganisms) and the sequential circulation of the fuel through the different cells of the stack, in all cases the systems ran out of fuel and this was reflected in lower production of electricity, compared with that expected taking into account the number of cells stacked. Results obtained from the polarization curves and the cathodic oxygen consumption also support this explanation. CONCLUSIONS: Results demonstrate that algal biomass is a suitable fuel for energy generation using MFC technology and provides microorganisms not only of a carbon source but also with the required nutrients. However, the low coulombic efficiencies obtained in the three stacks indicate that feeding algae to MFC also promotes the formation of an important amount of non‐electrogenic microorganisms that compete successfully with bioelectrogenic microorganisms for the substrate provided. © 2017 Society of Chemical Industry
    Keywords algae ; bioenergy ; biomass ; carbon ; chemical oxygen demand ; electricity ; energy ; fuels ; microbial fuel cells ; microorganisms ; nutrients ; oxygen consumption
    Language English
    Dates of publication 2018-01
    Size p. 287-293.
    Publishing place John Wiley & Sons, Ltd
    Document type Article
    Note JOURNAL ARTICLE
    ZDB-ID 1479465-2
    ISSN 1097-4660 ; 0268-2575
    ISSN (online) 1097-4660
    ISSN 0268-2575
    DOI 10.1002/jctb.5354
    Database NAL-Catalogue (AGRICOLA)

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