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All Journal Biota: Jurnal Ilmiah Ilmu-Ilmu Hayati Sultra Journal of Mechanical Engineering (SJME)
Indriyani, Yohanna Anisa
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Control & Systems Engineering Energy Materials Science & Nanotechnology Mechanical Engineering

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Isolation and Electrochemical Evaluation of Electrogenic Bacteria from the Sediment of Two Waterlogged-Ecosystems Indriyani, Yohanna Anisa; Rusmana, Iman; Anwar, Syaiful; Djajakirana, Gunawan; Santosa, Dwi Andreas
Biota : Jurnal Ilmiah Ilmu-Ilmu Hayati Vol 10, No 1 (2025): February 2025
Publisher : Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/biota.v10i1.9476

Abstract

Electrogenic microbes have been exploited in the microbial fuel cell (MFC) system for harvesting bioelectricity. Electrogens are widely distributed in various environments, but the exploration of this microbial group from ecosystems in Indonesia is still limited. This present study aimed to isolate the electrogenic bacteria from sediments of two waterlogged ecosystems (dam and paddy field) using serial dilution into extinction method prior to streak plate method on the solid thioglycollate media supplemented with Fe3+. Electrochemical evaluation was conducted in glucose-fed dual-chamber MFC by using Arduino UNO-based data logger for the accurate monitoring of electricity production in the term of open circuit voltage (OCV). A total of 54 electrogens were successfully isolated from these two ecosystems, ranging from weakness to strongest electrogens (OCV >800 mV) and ranging from microaerophilic, aerotolerant and facultative anaerobes, to obligate anaerobes. This result also suggested that sediment of waterlogged ecosystems rich in electron donor and solid acceptor electron compounds could potentially host electrogenic microbes. The exploration of electrogens from many other waterlogged ecosystems in Indonesia, both natural and anthropic ecosystems, could be conducted to collect genetic resources of novel electrogenic bacteria for the development of MFC technology in Indonesia.
Microbial fuel cells (MFC): Sebuah teknologi untuk biokonversi energi kimia pada limbah organik menjadi biolistrik Indriyani, Yohanna Anisa; Efendi, Rustam
Sultra Journal of Mechanical Engineering Vol 4 No 1 (2025): Sultra Journal of Mechanical Engineering
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Sulawesi Tenggara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54297/sjme.v4i1.1123

Abstract

Microbial fuel cells (MFC) adalah alat bioelektrokimia yang dapat mengubah energi kimia menjadi energi listrik melalui aktivitas katalitik mikrob electrogen. Indonesia merupakan negara dengan populasi penduduk terpadat ke-4 di dunia, yang menghadapi tantangan akan kebutuhan energi terbarukan dan pengolahan limbah. Tulisan ini akan fokus pada topik pengolahan limbah di mana MFC menjadi salah satu teknologi alternatif untuk biokonversi limbah organik menjadi energi (biolistrik), serta tantangan-tantangan dalam pengembangannya. Beragamnya limbah organik yang dapat dimanfaatkan sebagai substrat serta besarnya potensi mikrob indigenous dari negeri mega-biodiversitas ini untuk diekslporasi sebagai biokatalisator MFC menunjukkan potensi besar pengembangan teknologi ini di Indonesia. Sejumlah limbah organik lokal telah diteliti dan menunjukkan potensi pengurangan COD (COD removal) mencapai 13.33-77.22% dan potensi listrik yang dihasilkan sekitar 7.74-700 mW m-2. MFC menghadirkan teknologi yang berkelanjutan dan ramah lingkungan, serta menawarkan pemecahan masalah dalam menangani limbah dibandingkan teknologi pengolahan limbah secara fisik-kimia-biologis konvensional yang masih dihadapkan pada sejumlah tantangan, di antaranya boros energi dan biaya. Meski demikian, aplikasi skala besar teknologi MFC masih menghadapi kendala teknis dan ekonomis.
Co-Authors DWI ANDREAS SANTOSA Gunawan Djajakirana Iman Rusmana Rustam Efendi Syaiful Anwar