Performance Optimization of Microbial Fuel Cell (MFC) Using Lactobacillus bulgaricus

Abstract

Electrical energy needs in Indonesia are expected to continue to rise. The use of petroleum as a source of energy still dominates, although oil reserves in Indonesia are increasingly being depleted. Therefore, there is a need to develop alternative sources of sustainable energy, such as microbial fuel cell (MFC). In this study, Lactobacillus bulgaricus was used as an electricity producer in a dual-chamber MFC reactor. We investigated the maximum electrical energy by varying the bacterial optical density (OD), the operational time of MFC, the reactor volume, the electrolyte solution, and the configuration of MFC reactor. In this study, the maximum electrical energy (201.8 mW/m 2 ) was generated at an OD of 0.5 in an MFC reactor series using potassium permanganate as the electrolyte solution. AbstrakOptimasi Kinerja Microbial Fuel Cell (MFC) dengan Bakteri Lactobacillus bulgaricus. Kebutuhan energi listrik di Indonesia diperkirakan akan terus meningkat. Namun penggunaan minyak bumi sebagai sumber penghasil energi masih mendominasi, padahal cadangan minyak bumi di Indonesia kian menipis. Oleh karena itu, perlu dikembangkan alternatif penghasil sumber energi yang berkelanjutan, salah satunya adalah microbial fuel cell (MFC). Pada penelitian ini, digunakan bakteri Lactobacillus bulgaricus sebagai penghasil listrik pada reaktor MFC dual-chamber. Untuk memperoleh energi listrik yang maksimum, dilakukan variasi optical density (OD), waktu operasi, volume reaktor, larutan elektrolit, dan konfigurasi reaktor MFC. Dari penelitian ini, dihasilkan energi listrik maksimum berupa power density sebesar 201,9 mW/m 2 pada reaktor MFC seri dengan OD 0,5 dan kalium permanganat sebagai larutan elektrolit.

Development of a Bioanode for Microbial Fuel Cells Based on the Combination of a MWCNT‐Au‐Pt Hybrid Nanomaterial, an Osmium Redox Polymer and Gluconobacter oxydans DSM 2343 Cells

“…A diverse range of microorganisms, such as G. oxydans, ,, Rhodoferax ferrireducens, Saccharomyces cerevisiae, Geobacter sulfurreducens and Escherichia coli have been used in the design of MFCs. Work in this report shows that G. oxydans can be used as efficiently as any other commonly used microorganism and can be improved by the combination of bioanode components.…”

Bioelectricity of Various Carbon Sources on Series Circuit from Microbial Fuel Cell System using Lactobacillus plantarum

“…Analisis populasi bakteri dari mikroorganisme yang ada di MFC sejauh ini telah diteliti dengan jenis bakteri yang bervariasi [3]. Fernandez dan Vega telah menggunakan Lactobacillus plantarum, Streptococcus lactis, and Erwinia dissolvens dalam sistem MFC menggunakan substrat glukosa [8] dan Lactobacillus bulgaricus juga telah digunakan dalam sistem MFC oleh Arbianti [9]. Penelitian tersebut telah menunjukkan bahwa jenis bakteri asam laktat (BAL) memiliki potensi sebagai biokatalisator untuk aplikasi MFC.…”

Waste Degradation and Utilization by Lactic Acid Bacteria: Use of Lactic Acid Bacteria in Production of Food Additives, Bioenergy and Biogas

“…Lactobacillus bulgaricus was tested as producer of electricity. The maximum power (201.8 mW/m 2 ) was generated at optical density 0.5 by connecting in series MFC reactors with potassium permanganate as the electrolyte solution [158]. Further on, electricity output reached power density 393.23 mW/m 2 with LAB application [159].…”