Water formation at the cathode and sodium recovery using Microbial Fuel Cells (MFCs)

Gajda, Iwona; Greenman, John; Melhuish, Chris; Santoro, Carlo; Li, Baikun; Cristiani, Pierangela; Ieropoulos, Ioannis

doi:10.1016/j.seta.2014.05.001

Cited by 55 publications

(47 citation statements)

References 32 publications

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“…During this time the amount of anolyte lost was proportional to the accumulated catholyte. This is in agreement with the previously published work that reported on catholyte generation [12].…”

Section: Power Performancesupporting

confidence: 94%

“…This has resulted in many recent studies moving away from electricity generation and instead focussing on electricity consumption via Microbial Electrolysis Cells, where microbially assisted electrosynthesis can effectively be used for the production of oxidants or disinfectants [11] or even water dissociation via electrodialysis for separating the ionic species. However, it has recently been reported that the same process of microbially driven electrosynthesis can be achieved with both energy production and simultaneous elemental recovery in a simple MFC design [12]. This process generated a highly saline catholyte that additionally acted as a dragging mechanism, similar to the osmotic MFC.…”

Section: Introductionmentioning

confidence: 99%

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Simultaneous electricity generation and microbially-assisted electrosynthesis in ceramic MFCs

Gajda

Greenman

Melhuish

et al. 2015

Bioelectrochemistry

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105

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To date, the development of microbially assisted synthesis in Bioelectrochemical Systems (BESs) has focused on mechanisms that consume energy in order to drive the electrosynthesis process. This work reports--for the first time--on novel ceramic MFC systems that generate electricity whilst simultaneously driving the electrosynthesis of useful chemical products. A novel, inexpensive and low maintenance MFC demonstrated electrical power production and implementation into a practical application. Terracotta based tubular MFCs were able to produce sufficient power to operate an LED continuously over a 7 day period with a concomitant 92% COD reduction. Whilst the MFCs were generating energy, an alkaline solution was produced on the cathode that was directly related to the amount of power generated. The alkaline catholyte was able to fix CO2 into carbonate/bicarbonate salts. This approach implies carbon capture and storage (CCS), effectively capturing CO2 through wet caustic 'scrubbing' on the cathode, which ultimately locks carbon dioxide.

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Section: Power Performancesupporting

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Simultaneous electricity generation and microbially-assisted electrosynthesis in ceramic MFCs

Gajda

Greenman

Melhuish

et al. 2015

Bioelectrochemistry

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105

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“…For example, incorporating photosynthetic organisms can provide active electron acceptors for the cathode, as well as dissolved oxygen for the ORR [7,14e16]. It has been previously shown that the cathodic half-cell can be part of a carbon capture system via an open to air configuration [17] where carbon capture can be achieved by (i) the mineralisation of CO 2 into trona and (ii) the growth of phototrophic organisms in doublechamber MFCs [18,19]. The use of phototrophs as biocatalysts in the cathode half-cell aims to: (i) meet the oxygen level requirements for the ORR [14] and (ii) produce biomass that can be subsequently used directly as the fuel for the MFC anode.…”

Section: Introductionmentioning

confidence: 99%

Self-sustainable electricity production from algae grown in a microbial fuel cell system

Gajda

Greenman

Melhuish

et al. 2015

Biomass and Bioenergy

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173

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a b s t r a c tThis paper describes the potential for algal biomass production in conjunction with wastewater treatment and power generation within a fully biotic Microbial Fuel Cell (MFC). The anaerobic biofilm in the anodic half-cell is generating current, whereas the phototrophic biofilm on the cathode is providing the oxygen for the Oxygen Reduction Reaction (ORR) and forming biomass. The MFC is producing electricity with simultaneous biomass regeneration in the cathodic half-cell, which is dependent on the nutrient value of the anodic feedstock. Growth of algal biomass in the cathode was monitored, assessed and compared against the MFC power production (charge transfer), during this process. MFC generation of electricity activated the cation crossover for the formation of biomass, which has been harvested and reused as energy source in a closed loop system. It can be concluded that the nutrient reclamation and assimilation into new biomass increases the energy efficiency. This work is presenting a simple and selfsustainable MFC operation with minimal dependency on chemicals and an energy generation system utilising waste products and maximising energy turnover through an additional biomass recovery.

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“…The anode chamber was full of a medium containing a synthetic wastewater [5] with the components and concentrations. Therefore, it could also be a promising approach to treat wastewater containing high COD [6].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Different Wavelength of Light for Microbial Fuel Cell with an Anode of Rhodopseudomonas faecalis (PSB-B)

Rong¹,

Hu²

2017

OALib

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A microbial fuel cell (MFC) with an algae-assisted cathode is a low-cost and sustainable way to provide the oxygen for the oxygen reduction reaction. The anode was with anaerobic microorganism, a kind of photosynthetic bacteria (PSB-B). An algae bioreactor was connected to cathode microbial fuel cells to increase power generation by supplying more oxygen to cathode electrode. In this study, we used red, blue and white LED light as the light source, and the anode and cathode were under irradiation respectively. The result showed that white LED light was an effective factor for the anode, the cell voltage was built up from 34 mv to 60 mv, power density increased up to 2.5 mW/m 2 , the red and blue light had positive impact on the voltage. At cathode, the voltage was almost on steady stage conditions, and it was fluctuated around 35 mv by oxygen bubbles that were produced by algae. This relatively simple method increased the oxygen reduction rate at a low cost and could be applied to improve the performance of MFC. Subject AreasMicrobiology

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Water formation at the cathode and sodium recovery using Microbial Fuel Cells (MFCs)

Cited by 55 publications

References 32 publications

Simultaneous electricity generation and microbially-assisted electrosynthesis in ceramic MFCs

Simultaneous electricity generation and microbially-assisted electrosynthesis in ceramic MFCs

Self-sustainable electricity production from algae grown in a microbial fuel cell system

The Effect of Different Wavelength of Light for Microbial Fuel Cell with an Anode of Rhodopseudomonas faecalis (PSB-B)

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