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All Journal Communications in Science and Technology International Journal of Renewable Energy Development
Abu Bakar, Mimi Hani
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Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering

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Evaluating hydrogen production from glucose using graphite felt beads as a solid matrix in immobilized mixed cell reactor at thermophilic fermentation Ssatar, Ibdal; Salehmin, Mohd Nur Ikhmal; Abu Bakar, Mimi Hani; Wan Daud, Wan Ramli; Kumalasari, Ika Dyah; Aziz, Muhammad; Somalu, Mahendara Rao; Kim, Byung Hong
Communications in Science and Technology Vol 8 No 2 (2023)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.8.2.2023.1238

Abstract

This study has successfully evaluated graphite felt (GF) beads as a solid matrix to immobilize or trap the mixed cultures in an immobilized mixed-cell reactor (IMcR). The anaerobic sludge of palm oil mill effluent was used as an inoculum source in the IMcR with mixed culture. Here, glucose, sucrose, and starch were used as the model substrates to evaluate the performance of IMcR with GF beads for producing bio-hydrogen (BioH2). BioH2, effluent, and surface morphology of GF beads were analyzed by using gas chromatography equipped with a thermal conductivity detector, high-performance liquid chromatography, and scanning electron microscopy, respectively. The highest H2 yield (YH2) and production rates were obtained at 304.0 ± 13.2 mL g?1COD (corresponding to 2.26 mol mol?1glucose) and 1403 ± 61 mL L?1 day?1, respectively. IMcR with GF beads is a new approach for generating high YH2, which can be used for more than two months in an experimental run.
Evaluating the performance of stainless steel in microbial electrolysis cells: Hydrogen production and corrosion behaviour Shamsuddin, Raba’atun Adawiyah; Abu Bakar, Mimi Hani; Wan Daud, Wan Ramli; Kim, Byung Hong; Md. Jahim, Jamaliah; Wan Mohd Noor, Wan Syaidatul Aqma; Yunus, Rozan Mohamad; Satar, Ibdal; Ndayisenga, Fabrice
International Journal of Renewable Energy Development Vol 15, No 2 (2026): March 2026
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2026.61531

Abstract

Microbial Electrolysis Cells (MECs) provide a sustainable route to hydrogen production via microbial electron transfer, while the biocathode enhances affordability and functionality. Stainless steel (SS) is an ideal material for bioelectrochemical systems (BES) due to its high recyclability and corrosion resistance. The chromium content forms a protective, corrosion-resistant layer that promotes beneficial microbial interactions and enhances durability. However, the MEC requires an oxygen-free cathode, which is incompatible with the layer. This study evaluated the corrosion resistance of SS to microbial interactions, also known as microbial-influenced corrosion (MIC).  The results from SS are compared with those from carbon steel (CS) and graphite felt (GF), which are standard laboratory electrode materials used as controls. The performance of these biocathodes was assessed in both open-circuit (Co-MEC) and closed-circuit (Cc-MEC) conditions over a 120-day operational period, with a focus on hydrogen production and corrosion resistance against MIC. SS biocathodes exhibited the highest hydrogen production rate (2.33 ± 0.34 LH₂/m². day), outperforming CS by 54% and GF by 1.3%. Additionally, the SS system demonstrated superior chemical oxygen demand (COD) removal efficiency, achieving 45% COD removal, comparable to the GF (44%), whereas CS achieved 38%. The corrosion analysis revealed that the corrosion rate (RM) of CS (0.08 ± 0.08 mm/year) was 86% higher than that of SS and GF (0.03 ± 0.03 mm/year) under Cc-MEC mode. Microbial community analysis revealed a higher abundance of Desulfovibrio, a genus within the sulphate-reducing bacteria (SRB) group, in Co-MEC systems, which contributes to increased corrosion. In contrast, the Cc-MEC system showed an increase in electrochemically active bacteria (EAB), including Pseudomonas, which are known to promote hydrogen evolution and inhibit SRB. This study highlights the need for further research into corrosion-resistant materials and the optimisation of microbial communities.
Co-Authors Ika Dyah Kumalasari Jamaliah Md. Jahim Kim, Byung Hong Muhammad Aziz Ndayisenga, Fabrice Salehmin, Mohd Nur Ikhmal Satar, Ibdal Shamsuddin, Raba’atun Adawiyah Somalu, Mahendara Rao Ssatar, Ibdal Wan Daud, Wan Ramli Wan Mohd Noor, Wan Syaidatul Aqma Yunus, Rozan Mohamad