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All Journal Jurnal Biogenerasi
Elsa Yuniarti
State University of Padang
Education Languange, Linguistic, Communication & Media Other

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POTENSI Bacillus licheniformis strain Nam 2-2 DALAM PRODUKSI BIOLISTRIK PADA VARIASI pH Silvi Tamara Silvi; Irdawati; Linda Advinda; Elsa Yuniarti
Jurnal Biogenerasi Vol. 11 No. 2 (2026): April - Juni 2026
Publisher : Universitas Cokroaminoto Palopo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30605/55fxme08

Abstract

The increasing global energy demand has encouraged the development of sustainable alternative energy sources such as Microbial Fuel Cells (MFCs). This study aimed to determine the optimum pH for bioelectricity production using Bacillus licheniformis strain Nam 2-2 in a dual-chamber MFC system. The experiment employed a completely randomized design with pH variations of 7, 7.5, and 8. Voltage output was measured every 2 hours over a 24-hour incubation period. The results showed that bioelectricity production increased over time, reached a peak at 16–20 hours, and then declined. The highest voltage was observed at pH 7.5, reaching 0.782 mV, followed by pH 8 (0.758 mV) and pH 7 (0.748 mV). These findings indicate that slightly alkaline conditions are more favorable for microbial activity and electron transfer efficiency. Therefore, pH optimization is essential to improve MFC performance and supports its potential as a renewable energy source.
POLA PRODUKSI BIOLISTRIK Aneurinibacillus thermoaerophilus STRAIN N25  PADA VARIASI SUBSTRAT LIMBAH PERTANIAN Dinda Aulia Nabila; Irdawati; Dezi Handayani; Elsa Yuniarti
Jurnal Biogenerasi Vol. 11 No. 2 (2026): April - Juni 2026
Publisher : Universitas Cokroaminoto Palopo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30605/2mcsjx62

Abstract

The increasing energy demand encourages the development of renewable energy technologies such as Microbial Fuel Cell (MFC), which converts organic substrates into electricity using microorganisms. This study aimed to analyze bioelectricity production by Aneurinibacillus thermoaerophilus strain N25 using different substrates (glucose, corn cob, rice straw, and rice husk). The experiment was conducted using a dual-chamber MFC system with voltage measurements over 24 hours. The results showed that voltage increased over time, peaked at the 20th hour, and then decreased. The highest voltage was produced by glucose (0.802 mV), followed by corn cob (0.724 mV), rice straw (0.581 mV), and rice husk (0.491 mV). These results indicate that substrate type affects bioelectricity production, with corn cob as the best agricultural waste substrate.
Co-Authors Dezi Handayani Dinda Aulia Nabila Irdawati Linda Advinda Silvi Tamara Silvi