MICROBIAL ENRICHMENT PROCESS IN THE ANODE OF MICROBIAL FUEL CELL SYSTEM USING TOFU WASTEWATER (TWW) ANAEROBIC SLUDGE

Microbial fuel cell consisting two main components which are anode and cathode materials. In the microbial fuel cell, both anode and cathode compartments are separated with a separator. Anode generates the protons and electrons while cathode converts protons into water with the presence electrons and oxygen. During the Microbial fuel cell operation, the performance of anode is very crucial due to it provides the protons and electrons. Hence, the high efficiency microbial fuel cell is very related with the high anode performance. This work addressed to the enrichment process of electroactive bacteria (EAB) in anode of microbial fuel cell. In this work, some parameters such as current generations, , and pH changes were used to assess the enrichment process of EAB was reached. In addition, the presence of EAB on the anode surface was identified based on the morphology of anode surface. The removal of COD and the pH value were determined by using the American public health analysis method and pH tester, respectively. The morphology of anode surface was analysed by using a scanning electron microscope. Whereas, current generation was tested by using a mustimeter. The removal of COD and final pH were obtained 71.4 % and 5.7, respectively. The optimum current generation was observed 0.19 mA. The surface morphology of anode before enriched with microbes was clear surface, while after enriched with microbes was attached by microbes. The removal of COD, pH changes, current generation and morphology of anode surface could be used to assess the EAB in the anode compartment. Keywords: Microbial fuel cell; anode; cathode; electroactive bacteria; pH changes.

Download Full-text

Pre-treatment of anodic inoculum with nitroethane to improve performance of a microbial fuel cell

Water Science & Technology ◽

10.2166/wst.2018.206 ◽

2018 ◽

Vol 77 (10) ◽

pp. 2491-2496 ◽

Cited By ~ 13

Author(s):

P. P. Rajesh ◽

Md. T. Noori ◽

M. M. Ghangrekar

Keyword(s):

Fuel Cell ◽

Microbial Fuel Cell ◽

Coulombic Efficiency ◽

Production Capacity ◽

Linear Sweep Voltammetry ◽

Anode Surface ◽

Anaerobic Sludge ◽

Operating Voltage ◽

Methanogenic Activity ◽

Pre Treatment

Abstract Methanogenic substrate loss is reported to be a major bottleneck in microbial fuel cell (MFC), which significantly reduces the power production capacity and coulombic efficiency (CE) of this system. Nitroethane is found to be a potent inhibitor of hydrogenotrophic methanogens in rumen fermentation process. Influence of nitroethane pre-treated sewage sludge inoculum on suppressing the methanogenic activity and enhancing the electrogenesis in MFC was evaluated. MFC inoculated with nitroethane pre-treated anodic inoculum demonstrated a maximum operating voltage of 541 mV, with CE and maximum volumetric power density of 39.85% and 20.5 W/m3, respectively. Linear sweep voltammetry indicated a higher electron discharge on the anode surface due to enhancement of electrogenic activity while suppressing methanogenic activity. A 63% reduction in specific methanogenic activity was observed in anaerobic sludge pre-treated with nitroethane, emphasizing the significance of this pre-treatment for suppressing methanogenesis and its utility for enhancing electricity generation in MFC.

Download Full-text

Hexavalent chromium reduction and energy recovery by using dual-chambered microbial fuel cell

Water Science & Technology ◽

10.2166/wst.2014.524 ◽

2014 ◽

Vol 71 (3) ◽

pp. 353-358 ◽

Cited By ~ 36

Author(s):

Praveena Gangadharan ◽

Indumathi M. Nambi

Keyword(s):

Fuel Cell ◽

Microbial Fuel Cell ◽

Hexavalent Chromium ◽

Ph Value ◽

Anaerobic Sludge ◽

Anode Chamber ◽

Ambient Conditions ◽

Carbon Reduction ◽

Organic Electron ◽

Initial Ph

Microbial fuel cell (MFC) technology is utilized to treat hexavalent chromium (Cr(VI)) from wastewater and to generate electricity simultaneously. The Cr(VI) is bioelectrochemically reduced to non-toxic Cr(III) form in the presence of an organic electron donor in a dual-chambered MFC. The Cr(VI) as catholyte and artificial wastewater inoculated with anaerobic sludge as anolyte, Cr(VI) at 100 mg/L was completely removed within 48 h (initial pH value 2.0). The total amount of Cr recovered was 99.87% by the precipitation of Cr(III) on the surface of the cathode. In addition to that 78.4% of total organic carbon reduction was achieved at the anode chamber within 13 days of operation. Furthermore, the maximum power density of 767.01 mW/m2 (2.08 mA/m2) was achieved by MFCs at ambient conditions. The present work has successfully demonstrated the feasibility of using MFCs for simultaneous energy production from wastewater and reduction of toxic Cr(VI) to non-toxic Cr(III).

Download Full-text

DYNAMICS ANALYSIS OF A MICROBIAL FUEL CELL SYSTEM AND PID CONTROL OF ITS POWER AND CURRENT BASED ON THE CRITICAL PROPORTION DEGREE METHOD

Environmental Engineering and Management Journal ◽

10.30638/eemj.2015.194 ◽

2015 ◽

Vol 14 (8) ◽

pp. 1821-1828 ◽

Cited By ~ 3

Author(s):

Aimin An ◽

Jing Wang ◽

Haochen Zhang ◽

Guoqiang Yang

Keyword(s):

Fuel Cell ◽

Microbial Fuel Cell ◽

Pid Control ◽

Cell System ◽

Dynamics Analysis ◽

Fuel Cell System

Download Full-text

Electricity Production from Dual Chambers Microbial Fuel Cell Fed with Chicken Manure-Wastewater

Wasit Journal of Engineering Sciences ◽

10.31185/ejuow.vol3.iss1.31 ◽

2015 ◽

Vol 3 (1) ◽

pp. 9-18

Author(s):

Ali J. Jaeel

Keyword(s):

Fuel Cell ◽

Microbial Fuel Cell ◽

Chicken Manure ◽

Electricity Production ◽

Anaerobic Sludge ◽

Livestock Wastewater ◽

Graphite Electrodes ◽

Reliable Source ◽

Current Densities ◽

Resistance Value

Chicken manure wastewaters are increasingly being considered a valuable resource of organic compounds. Screened chicken manure was evaluated as a representative solid organic waste. In this study, electricity generation from livestock wastewater (chicken manure) was investigated in a continuous mediator-less horizontal flow microbial fuel cell with graphite electrodes and a selective type of membrane separating the anodic and cathodic compartments of MFC from each other. The performance of MFC was evaluated to livestock wastewater using aged anaerobic sludge. Results revealed that COD and BOD removal efficiencies were up to 88% and 82%, respectively. At an external resistance value of 150 Ω, a maximum power and current densities of 278 m.W/m2 and 683 mA/m2, respectively were obtained, hence MFC utilizing livestock wastewater would be a sustainable and reliable source of bio-energy generation .

Download Full-text

Biological modification in air-cathode microbial fuel cell: Effect on oxygen diffusion, current generation and wastewater degradation

Chemosphere ◽

10.1016/j.chemosphere.2021.131243 ◽

2021 ◽

pp. 131243

Author(s):

Ambika Arkatkar ◽

Arvind Kumar Mungray ◽

Preeti Sharma

Keyword(s):

Fuel Cell ◽

Microbial Fuel Cell ◽

Oxygen Diffusion ◽

Diffusion Current ◽

Air Cathode ◽

Current Generation ◽

Biological Modification

Download Full-text

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

Applied and Environmental Microbiology ◽

10.1128/aem.00804-07 ◽

2007 ◽

Vol 73 (16) ◽

pp. 5347-5353 ◽

Cited By ~ 93

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.

Download Full-text