Search results for "MFC"

Phosphomolybdic acid and mixed phosphotungstic/phosphomolybdic acid chitosan membranes as polymer electrolyte for H2/O2 fuel cells

2017

Abstract Flat, free-standing phosphomolybdic acid and mixed phosphotungstic/phosphomolybdic acid chitosan membranes were prepared by in-situ ionotropic gelation process at room temperature on porous alumina support firstly impregnated by heteropolyacid. Scanning electron microscopy revealed the formation of compact and homogenous polymeric membranes, whose thickness resulted to be dependent on reticulation time, and almost independent on the employed heteropolyacid nature and concentration. X-ray diffraction and Fourier transform infrared spectroscopy evidenced the formation of crystalline membranes without appreciable concentration of unprotonated NH 2 groups and heteropolyacid ions with p…

Abatement of AO7 in a divided microbial fuel cells by sequential cathodic and anodic treatment powered by different microorganisms

2017

Abstract Microbial fuel cells (MFCs) can allow the treatment of organic pollutants resistant to conventional biological processes by electro-Fenton (EF) process performed in the cathodic compartment. However, EF usually results in a partial mineralization of pollutants. Here, we have studied the possible treatment of such organics in a MFC by a sequential cathodic and anodic treatment. In particular, the treatment of an aqueous solution of Acid Orange (AO7), a largely used azoic dye resistant to conventional biological processes, was performed in the cathodic compartment of a divided MFC by EF. The process allowed the total removal of the color and the partial removal of the TOC, due mainly…

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

2016

Abstract Microbial Fuel Cells (MFCs) are bio-electrochemical devices which convert the chemical energy content of organic fuels into electricity, thanks to the ability of anode respiring bacteria to give electrons to the anode. This result is usually achieved under anaerobic conditions, obtained with a sealed anode chamber. Despite this, Shewanella oneidensis has been recognized by many authors to obtain the same results in presence of air. Furthermore, another member of the Pseudomonaceae family, Shewanella putrefaciens, has also shown the capability to catalyze the cathodic oxygen reduction. In this work the capability of S. putrefaciens to work under both anaerobic and micro-aerobic cond…

Chitosan-heteropolyacid complex as high performance membranes for low temperature H2-O2 fuel cell

2014

Electricity Production from Yeast Wastewater in Membrane-Less Microbial Fuel Cell with Cu-Ag Cathode

2023

Wastewater has high potential as an energy source. Therefore, it is important to recover even the smallest part of this energy, e.g., in microbial fuel cells (MFCs). The obtained electricity production depends on the process rate of the electrodes. In MFC, the microorganisms are the catalyst, and the cathode is usually made of carbon material (e.g., with the addition of Pt). To increase the MFC efficiency (and reduce costs by reducing use of the noble metals), it is necessary to search the new cathode materials. In this work, the electricity production from yeast wastewater in membrane-less microbial fuel cells with Cu-Ag cathode was analyzed. In the first place, the measurements of the sta…

Dažādu oglekļa bāzētu materiālu elektrodu pielietojamība mikroorganismu degvielas šūnās

2016

Darba mērķis bija novērtēt grafīta, grafēna un grafēna-PLA kompozīta elektrodu pielietojamību MFC. Darbā konstruētas 8 sendviču tipa šūnas ar agara tiltiņu un 8 šūnas ar Nafion212 membrānu. 8 šūnas darbojās ar ezera dūņām, 8 ar P. aeruginosa tīrkultūru. MFC mērītas polarizācijas līknes un iegūts maksimālais jaudas blīvuma parametrs. Maksimālo MFC jaudas blīvumu uzrādīja 3D printēta grafēna-PLA, Nafiona212 un P. aeruginosa kombinācija – attiecīgi 35,8 mW/m2. Grafēna-PLA elektrodu voltametrija uzrādīja sliktākas elektroķīmiskās īpašības, nekā grafītam. Tomēr MFC šūnās elektrodi strādāja tikpat labi un labāk kā grafīts, kas norāda uz labāku biosaderību. Darbs izstrādāts periodā no 2015. gada d…