Effect of increasing anode surface area on the performance of a single chamber microbial fuel cell

2010 ◽  
Vol 156 (1) ◽  
pp. 40-48 ◽  
Author(s):  
Mirella Di Lorenzo ◽  
Keith Scott ◽  
Tom P. Curtis ◽  
Ian M. Head
Keyword(s):  
Fuel Cell ◽  
Surface Area ◽  
Microbial Fuel Cell ◽  
Anode Surface ◽  
Single Chamber

A single chamber packed bed microbial fuel cell biosensor for measuring organic content of wastewater

2009 ◽  
Vol 60 (11) ◽  
pp. 2879-2887 ◽  
Author(s):  
Mirella Di Lorenzo ◽  
Tom P. Curtis ◽  
Ian M. Head ◽  
Sharon B. Velasquez-Orta ◽  
Keith Scott
Keyword(s):  
Fuel Cell ◽  
Surface Area ◽  
Microbial Fuel Cell ◽  
Packed Bed ◽  
Organic Content ◽  
Anode Surface ◽  
Carbon Cloth ◽  
Single Chamber ◽  
Steady State Current ◽  
Bed Thickness

This study reports an investigation of the effect of the anode surface area on the performance of a single chamber microbial fuel cell (SCMFC) based biosensor for measuring the organic content of wastewater. A packed bed of graphite granules was used as the anode. The surface area of the anode was changed by altering the granule bed thickness (0.3 cm and 1 cm). The anode surface area was found to play a role in the dynamic response of the system. For a granule bed thickness of 1 cm and with an external resistance of 500 Ω, the response time (defined as the time required to achieve 95% of the steady-state current) was reduced by approximately 65% in comparison to a SCMFC biosensor with a carbon cloth anode.

scholarly journals BIOKONVERSI PADA PENGOLAHAN AIR LIMBAH INDUSTRI PULP DAN KERTAS MENGGUNAKAN MEMBRANE-LESS MICROBIAL FUEL CELL (ML-MFC)

2015 ◽  
Vol 5 (01) ◽  
Author(s):  
Kristaufan Joko Pramono ◽  
Krisna Adhitya Wardana ◽  
Prima Besty Asthary ◽  
Saepulloh .
Keyword(s):  
Wastewater Treatment ◽  
Fuel Cell ◽  
Surface Area ◽  
Microbial Fuel Cell ◽  
Supply Voltage ◽  
Pulp And Paper ◽  
Electricity Production ◽  
Organic Load ◽  
Anode Surface ◽  
Renewable Energy Resources

Pulp and paper industry produces large amount of wastewater that has high pollution potentials. Nowadays, development of renewable energy resources is being researched. Membrane-less Microbial Fuel Cell (ML-MFC) can be an alternative for wastewater treatment and bioenergy producers of renewable electricity. This study was subjected to evaluate the performance of ML-MFC in pulp and paper wastewater treatment and to analyze the potentials production of electricity energy. ML-MFC reactors in laboratory scale used in this experiment were made of acrylic, provided with electrodes functioning as anode and cathode which have surface area of 1.4778 x 10-2 m2 and 4.926 x 10-3 m2, respectively. In this experiment, wastewater from pulp and paper mill was continuously fed into the reactor with retention time of 48 hours and organic load about 0.23 – 0.51 kg COD/m3.day. The results showed that there was potential of electricity production from pulp and paper mill’s wastewater treatment by ML-MFC. The maximum COD reduction and maximum power supply voltage that could be achieved were 38.50% and 118.8 mV, respectively. The maximum electric power obtained on the anode surface area of 1.4778 x 10-2 m2 was 8.46 mW/m2 when the electric current value was 101.50 mA/m2 and the resistance was 500 Ω.Keywords: wastewater, organic, bioconversion, electricity, membrane-less microbial fuel cell (ML-MFC) ABSTRAKIndustri pulp dan kertas menghasilkan air limbah dalam jumlah besar yang memiliki potensi pencemaran tinggi. Saat ini, upaya pengembangan sumber energi terbarukan terus dilakukan. Membraneless Microbial Fuel Cell (ML-MFC) adalah salah satu alternatif pengolahan air limbah dan penghasil bioenergi listrik yang dapat terbarukan. Penelitian ini dilakukan untuk mengevaluasi kinerja ML-MFC dalam pengolahan air limbah pulp dan kertas proses biologi dan menganalisa potensi produksi energi listrik. Reaktor ML-MFC skala laboratorium yang digunakan dalam percobaan terbuat dari akrilik dengan rangkaian elektroda yang berfungsi sebagai anoda dengan luas permukaan 1,4778 x 10-2 m2 dan katoda dengan luas permukaan 4,926 x 10-3 m2. Pada percobaan ini, air limbah industri pulp dan kertas dialirkan melalui reaktor secara kontinu dengan waktu tinggal 48 jam dan beban organik 0,23 – 0,51 kg COD/m3.hari. Hasil penelitian menunjukkan bahwa terdapat potensi produksi energi listrik dari proses pengolahan air limbah industri pulp dan kertas oleh ML-MFC. Reduksi maksimum nilai COD dan tegangan listrik maksimum yang dapat dicapai adalah 38,50% dan 118,8 mV. Daya listrik maksimum yang diperoleh pada luas permukaan anoda sebesar 1,4778 x 10-2 m2 adalah 8,46 mW/m2 pada saat nilai arus listrik 101,50 mA/m2 dan beban resistansi 500 Ω.Kata kunci: air limbah, organik, biokonversi, energi listrik, membrane-less microbial fuel cell (ML-MFC)

scholarly journals New fragmented electro-active biofilm (FAB) reactor to increase anode surface area and performance of microbial fuel cell

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Tesfalem Atnafu ◽  
Seyoum Leta
Keyword(s):  
Fuel Cell ◽  
Surface Area ◽  
Microbial Fuel Cell ◽  
Coulombic Efficiency ◽  
Synergetic Effect ◽  
Cod Removal ◽  
Anode Surface ◽  
Biofilm Growth ◽  
Bench Scale ◽  
Lower Voltage

Abstract Background Microbial fuel cell (MFC) technology is a promising sustainable future energy source with a renewable and abundant substrate. MFC critical drawbacks are anode surface area limitations and electrochemical loss. Recent studies recommend thick anode biofilm growth due to the synergetic effect between microbial communities. Engineering the anode surface area is the prospect of MFC. In this study, a microbial electrode jacket dish (MEJ-dish) was invented, first time to the authors’ knowledge, to support MFC anode biofilm growth. The MFC reactor with MEJ-dish was hypothesized to develop a variable biofilm thickens. This reactor is called a fragmented electro-active biofilm-microbial fuel cell (FAB-MFC). It was optimized for pH and MEJ-dish types and tested at a bench-scale. Results Fragmented (thick and thin) anode biofilms were observed in FAB-MFC but not in MFC. During the first five days and pH 7.5, maximum voltage (0.87 V) was recorded in MFC than FAB-MFC; however, when the age of the reactor increases, all the FAB-MFC gains momentum. It depends on the MEJ-dish type that determines the junction nature between the anode and MEJ-dish. At alkaline pH 8.5, the FAB-MFC generates a lower voltage relative to MFC. On the contrary, the COD removal was improved regardless of pH variation (6.5–8.5) and MEJ-dish type. The bench-scale studies support the optimization findings. Overall, the FAB improves the Coulombic efficiency by 7.4–9.6 % relative to MFC. It might be recommendable to use both FAB and non-FAB in a single MFC reactor to address the contradictory effect of increasing COD removal associated with the lower voltage at higher pH. Conclusions This study showed the overall voltage generated was significantly higher in FAB-MFC than MFC within limited pH (6.5–7.5); relatively, COD removal was enhanced within a broader pH range (6.5–8.5). It supports the conclusion that FAB anode biofilms were vital for COD removal, and there might be a mutualism even though not participated in voltage generation. FAB could provide a new flexible technique to manage the anode surface area and biofilm thickness by adjusting the MEJ-dish size. Future studies may need to consider the number, size, and conductor MEJ-dish per electrode.

scholarly journals Lack of Electricity Production by Pelobacter carbinolicus Indicates that the Capacity for Fe(III) Oxide Reduction Does Not Necessarily Confer Electron Transfer Ability to Fuel Cell Anodes

2007 ◽  
Vol 73 (16) ◽  
pp. 5347-5353 ◽  
Author(s):  
Hanno Richter ◽  
Martin Lanthier ◽  
Kelly P. Nevin ◽  
Derek R. Lovley
Keyword(s):  
Electron Transfer ◽  
Fuel Cells ◽  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Microbial Fuel Cells ◽  
Electron Donors ◽  
Rrna Genes ◽  
Anode Surface ◽  
Oxide Reduction ◽  
Fuel Cell Anodes

ABSTRACT The ability of Pelobacter carbinolicus to oxidize electron donors with electron transfer to the anodes of microbial fuel cells was evaluated because microorganisms closely related to Pelobacter species are generally abundant on the anodes of microbial fuel cells harvesting electricity from aquatic sediments. P. carbinolicus could not produce current in a microbial fuel cell with electron donors which support Fe(III) oxide reduction by this organism. Current was produced using a coculture of P. carbinolicus and Geobacter sulfurreducens with ethanol as the fuel. Ethanol consumption was associated with the transitory accumulation of acetate and hydrogen. G. sulfurreducens alone could not metabolize ethanol, suggesting that P. carbinolicus grew in the fuel cell by converting ethanol to hydrogen and acetate, which G. sulfurreducens oxidized with electron transfer to the anode. Up to 83% of the electrons available in ethanol were recovered as electricity and in the metabolic intermediate acetate. Hydrogen consumption by G. sulfurreducens was important for ethanol metabolism by P. carbinolicus. Confocal microscopy and analysis of 16S rRNA genes revealed that half of the cells growing on the anode surface were P. carbinolicus, but there was a nearly equal number of planktonic cells of P. carbinolicus. In contrast, G. sulfurreducens was primarily attached to the anode. P. carbinolicus represents the first Fe(III) oxide-reducing microorganism found to be unable to produce current in a microbial fuel cell, providing the first suggestion that the mechanisms for extracellular electron transfer to Fe(III) oxides and fuel cell anodes may be different.

A single-chamber membraneless microbial fuel cell exposed to air using Shewanella putrefaciens

2016 ◽  
Vol 783 ◽  
pp. 268-273 ◽  
Author(s):  
Fabrizio Vicari ◽  
Adriana D'Angelo ◽  
Alessandro Galia ◽  
Paola Quatrini ◽  
Onofrio Scialdone
Keyword(s):  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Shewanella Putrefaciens ◽  
Single Chamber

scholarly journals Synchronous recovery of iron and electricity using a single chamber air-cathode microbial fuel cell

RSC Advances ◽  
2017 ◽  
Vol 7 (21) ◽  
pp. 12503-12510 ◽  
Author(s):  
Xiufen Li ◽  
Yan Zheng ◽  
Pengfei Nie ◽  
Yueping Ren ◽  
Xinhua Wang ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Electron Donor ◽  
Electricity Generation ◽  
Metal Recovery ◽  
Organic Substrates ◽  
Air Cathode ◽  
Single Chamber ◽  
Attractive Option

In recent years, microbial fuel cell (MFC) technology has become an attractive option for metal recovery/removal at the cathode combined with electricity generation, using organic substrates as electron donor at the anode.

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