Phd Thesis Microbial Fuel Cell

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Interactive effects existed among the chosen independent factors with external resistance having a significant impact on MFC performance, with maximum power output of 24 m Wm-2 obtained at optimised conditions - external resistance (69.80 kΩ) , redox mediator (29.30μM, Riboflavin) and salinity (1.3 % w/v Na Cl). doi:10.1016/j.jhazmat.20 Adelaja, O., Keshavarz, T.

The treatment of a mixture of phenanthrene and benzene using two different tubular MFCs designed for both in situ and ex situ applications in aqueous systems was investigated over long operational periods (up to 155 days).

Therefore, the overarching objective of this study was to develop an MFC system for the effective and efficient treatment of petroleum hydrocarbons in both liquid and particulate systems.

Biodegradation of target hydrocarbons, phenanthrene and benzene, was investigated in dual-chambered microbial fuel cells (MFCs) using different inoculum types - Shewanella oneidensis MR1 14063, Pseudomonas aeruginosa NCTC 10662, mixed cultures and their combinations thereof.

MFC technology could potentially be utilised as an independent system in lieu of other bioremediation technologies (e.g.

pump and treat, electrobioremediation or permeable reactive barriers) or integrated with existing infrastructure such as monitoring wells or piezometers. The outcomes of this work has demonstrated the simultaneous removal of phenanthrene (86%) and bromate (95%) coupled with concomitant bioelectricity generation (about 4.69 m Wm-2) using MFC systems within a radius of influence (ROI) up to 8 cm. The overall outcomes of this study suggest the possible application of MFC technology in the effective treatment of petroleum hydrocarbons contaminated groundwater or industrial effluents and soil systems (mostly in subsurface environments), with concomitant energy recovery. Treatment of phenanthrene and benzene using microbial fuel cells operated continuously for possible in situ and ex situ applications. Moreover, the use of ferricyanide as catholyte required regular replacement.It is important to control the anodic potential for accurate detection of current changes and the prevention of “false alarms”.Environmental pollution by petroleum hydrocarbons has serious environmental consequences on critical natural resources upon which all living things (including mankind) largely depend. Microbial fuel cells (MFCs) could be employed in the treatment of these environmental pollutants with concomitant bioelectricity generation. Effect of hydraulic retention time on the performance of a novel tubular MFC fed with petroleum hydrocarbons. All the MFC (or MEC)-biosensors in this study were conducted using a two-chamber MFC equipped with a cation exchange membrane, inoculated with microorganisms from marine sediment. Acetate or yeast extracts was used as electron donor in the anode.In general, results showed that MFC-biosensor established could detect the presence of AOC under marine conditions by producing electrochemical signals such as current peaks, coulombs output and the change of anodic potentials.To overcome the problems described above, a potentiostat-controlled marine MFC-biosensor (namely MEC-biosensor) was operated at a negative anodic potential (-300 m V (vs Ag/Ag Cl)) and produced useful signals within 14 days after inoculation.Results showed the electrochemical signals produced from the MEC-biosensor had sufficient reproducibility (standard deviations of 3 – 5 %) and could be of high precision (i.e.

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