The Effect of Electrode Type on Energy Efficiency in Microbial Fuel Cells Using vgb+ Recombinant Enterobacter aerogenes

Year 2019, Volume: 9 Issue: 1, 113 - 133, 28.06.2019

Ayşe Şebnem Erenler

Abstract

In this study, microbial fuel cells were designed using E. aerogenes, an important proton producing bacterium, to determine energy efficiency. In the design of these fuel cells, nafion membrane is preferred as a proton permeable membrane. Potassium ferricyanide was used in the cathode section when the anode partition mediator was prefered as methylene blue. Within the scope of the study, the efficiency of the electrode route on the optimization and energy efficiency of fuel pellets prepared using E. aerogenes was determined. A comparative study was carried out using graphite, composite and copper electrodes as the electrode type. In the experiment with copper electrode, the highest voltage value was read as 0.23 V, 0.38 V on the composite electrode and 0.52 V on the carbon electrode. It is determined that the electrode giving the highest voltage is the carbon electrode. Furthermore, optimization of designed microbial fuel cell’s nutrient, pH and microorganism incubation time has been realized.

Keywords

Fuel cell, Microbial fuel cell, Enterobacter aerogenes, vitreoscilla hemoglobin

vgb+ Rekombinant Enterobacter aerogenes Kullanılan Mikrobiyal Yakıt Pillerinde Enerji Verimliliği Üzerine Elektrot Türünün Etkisi

Abstract

Bu çalışma kapsamında önemli bir proton üreten bakteri türü olan E. aerogenes kullanılarak mikrobiyal yakıt hücreleri tasarımı gerçekleştirilerek enerji verimlilikleri belirlenmiştir. Bu yakıt hücrelerinin tasarımında proton geçirgen membrane olarak nafyon membran tercih edilmiştir. Anot bölmesi medyatörü metilen mavisi olarak tercih edilirken katot bölmesinde Potasyum ferrisiyanid kullanılmıştır. Çalışma kapsamında E. aerogenes kullanılarak hazırlanan yakıt pillerinin optimizasyonu ve enerji verimliliği üzerine elektrot türünün etkinliği belirlenmiştir. Elektrot türü olarak grafit, alaşım ve bakır elektrotlar kullanılarak kıyaslamalı bir çalışma gerçekleştirilmiştir. bakır elektrotla yapılan denemede en yüksek voltaj değeri 0.23 V, kompozit elektrotda 0.38 V, karbon elektrotta ise 0.52 V olarak okunmuştur. En yüksek voltaj miktarını veren elektrotun karbon elektrot olduğu saptanıştır. Ayrıca hazırlanan mikrobiyal yakıt pilinin, besiyeri, pH ve mikroorganizma inkübasyon süre optimizasyonları gerçekleştirilmiştir.

Keywords

Yakıt pili, Mikrobiyal yakıt pili, Enterobacter aerogenes, vitreoscilla hemoglobin

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