Discover insights from thousands of peer-reviewed papers on microbial electrochemical systems
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Fanghua Liu, Amelia‐Elena Rotaru, Pravin Malla Shrestha et al.
Energy & Environmental Science · 2012
Anaerobic digestion is a key technology for converting organic waste into methane, offering significant potential for renewable energy production and waste management. While the addition of conductive materials has been shown to improve direct interspecies electron transfer (DIET), their application faces challenges like biofouling, environmental risks, and increased operational costs. This study investigated the effects of co-culturing dual Methanosarcina ( Methanosarcina barkeri and Methanosarcina acetivorans ) and Geobacter metallireducens (DM-G) to enhance DIET and methane production without the addition of exogenous conductive materials. The performance of the DM-G co-culture system was comparable to that of the conductive material-amended single Methanosarcina and G. metallireducens (SM-G) co-culture systems, achieving a maximum methane concentration of 19.5 mM, following the consumption of 15.2 mM ethanol in the 1:1:1 biomass ratio system. This corresponds to a 3.8-fold increase over the SM-G co-culture system with M. barkeri and G. metallireducens , and a 3.0-fold increase over that with M. acetivorans and G. metallireducens . Transcriptomic analysis showed that in the DM-G co-culture system, M. barkeri up-regulated key genes related to methane metabolism and acetate utilization, while the core methanogenic pathway of M. acetivorans was down-regulated, but it could still effectively utilize the electron transfer pathway, indicating metabolic complementarity. These findings propose a novel strategy for enhancing DIET-driven methanogenesis through synergistic microbial consortia, advancing scalable, low-cost bioenergy solutions for organic waste valorization.
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Alessia Coccato, Luc Moëns, Peter Vandenabeele
Heritage Science · 2017
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Sagnik Mitra, Ganti S. Murthy
Systems Microbiology and Biomanufacturing · 2021
Gabriel Pérez‐Lucas, Simón Navarro
Journal of Xenobiotics · 2024
Ernest Mbamalu Ezeh, Peter Chinedu Agu, Epere Aworabhi
IntechOpen eBooks · 2024
Anjali Chandrol Solanki, Narendra Singh Gurjar, Satish Kumar Sharma et al.
Frontiers in Microbiology · 2024
Huajun Feng, Liyang Xu, Ruya Chen et al.
Frontiers in Microbiology · 2022
Lorena Peñacoba-Antoná, Carlos A. Ramírez-Vargas, Colin Wardman et al.
Frontiers in Microbiology · 2022
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Steven J. Forrester, Daniel S. Kikuchi, Marina S. Hernandes et al.
Circulation Research · 2018
Andi Mehmeti, Kledja Canaj
Resources · 2022
Muhamad Maulana Azimatun Nur, Shinta Justicia Dellarohita, Salsabila Fara Syakira
REAKTOR · 2025
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Microbial electrosynthesis (MES) allows the transformation of CO 2 into value-added products by coupling with renewable energy. The enhancement in the microbial activity and electron transfer rate via a new electrode modification method is essential for developing MES. Here, three groups of granular activated carbon decorated by Fe 3 O 4 (Fe 3 O 4 /GAC) with mass fractions of 23%, 38% and 50% were prepared and compared with bare GAC. The volumetric acetate production rate of MES with Fe 3 O 4 /GAC-38% was the highest (0.171 g L -1 d -1 ), which was 1.4 times higher that of the control (bare GAC), and the final acetate concentration reached 5.14 g L -1 within 30 days. Linear sweep voltammetry and microbial community analyses suggested that Fe 3 O 4 /GAC facilitates extracellular electron transfer and improves the enrichment of electrochemically active bacteria. Fe 3 O 4 /GAC is an effective three-dimensional electrode material that enhances biofilm activity on GAC and improves MES efficiency.
Sumira Malik, Shristi Kishore, Archna Dhasmana et al.
Water · 2023
Tessa Crosby, Lauren B. Stadler
ACS Environmental Au · 2025
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Urba Ziyauddin Siddiqui .
International Journal of Research in Engineering and Technology · 2013
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The aim of this study was to investigate the prevalence of oral and maxillofacial lesions among children from representative regions of Brazil. A retrospective descriptive study was conducted. Biopsy records comprising the period from 2000 to 2015 were obtained from the archives of three Brazilian oral pathology referral centers. A total of 32,506 biopsy specimens were analyzed, and specimens from 1,706 children aged 0-12 years were selected. Gender, age, anatomical location and histopathological diagnosis were evaluated. Descriptive statistics was carried out. Likelihood ratio tests were used to evaluate the association between the categorical variables. The level of significance was set at 0.05. The post-hoc test was used to identify the subgroups that significantly differed from one another, and the Bonferroni correction was applied. A total of 1,706 oral and maxillofacial lesions were diagnosed in pediatric patients, including 51.9% girls. Oral mucocele was the most prevalent reactive/inflammatory lesion (64%). The most commonly affected sites were the lips (34.5%) and mandible (19.9%). A significant association was observed between age and the group of lesions of the oral cavity (p < 0.001), and between age and anatomical location (p < 0.001). Pediatric oral and maxillofacial lesions were frequent and showed wide diversity, with the prevalence of mucocele. Knowledge of oral lesions is important for pediatric dentists worldwide, since it provides accurate data for the diagnosis and oral health of children.
Monserrat Castañeda-Juárez, Ivonne Linares‐Hernández, Verónica Martínez-Miranda et al.
Environmental Science and Pollution Research · 2022
Microbial electrolysis is a promising technology for converting aqueous wastes into hydrogen. However, substrate adaptability is an important feature, seldom documented in microbial electrolysis cells (MECs). In addition, the correlation between substrate composition and community structure has not been well established. This study used an MEC capable of producing over 10 L/L-day of hydrogen from a switchgrass-derived bio-oil aqueous phase and investigated four additional substrates, tested in sequence on a mature biofilm. The additional substrates included a red oak-derived bio-oil aqueous phase, a corn stover fermentation product, a mixture of phenol and acetate, and acetate alone.
Kishneth Palaniveloo, Muhammad Azri Amran, Nur Azeyanti Norhashim et al.
Processes · 2020
The integrated system of anaerobic digestion and microbial electrolysis cells (AD-MEC) was a novel approach to enhance the degradation of food waste anaerobic digestate and recover methane. Through long-term operation, the start-up method, organic loading, and methane production mechanism of the digestate have been investigated. At an organic loading rate of 4000 mg/L, AD-MEC increased methane production by 3-4 times and soluble chemical oxygen demand (SCOD) removal by 20.3% compared with anaerobic digestion (AD). The abundance of bacteria Fastidiosipila and Geobacter, which participated in the acid degradation and direct electron transfer in the AD-MEC, increased dramatically compared to that in the AD. The dominant methanogenic archaea in the AD-MEC and AD were Methanobacterium (44.4-56.3%) and Methanocalculus (70.05%), respectively. Geobacter and Methanobacterium were dominant in the AD-MEC by direct electron transfer of organic matter into synthetic methane intermediates. AD-MEC showed a perfect SCOD removal efficiency of the digestate, while methane as clean energy was obtained. Therefore, AD-MEC was a promising technology for deep energy transformation from digestate.
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Dorota Ochońska, Monika Brzychczy‐Włoch
Postępy Mikrobiologii - Advancements of Microbiology · 2024
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Ha T.T. Dinh, Hiromi Kambara, Yoshiki HARADA et al.
Microbes and Environments · 2021
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Swee Su Lim, Byung Hong Kim, Da Li et al.
Frontiers in Chemistry · 2018
Understanding the mechanism of electron transfer between the cathode and microorganisms in cathode biofilms in microbial electrolysis cells (MECs) for hydrogen production is important. In this study, biocathodes of MECs were successfully re-enriched and subjected to different operating parameters: applied potential, sulfate use and inorganic carbon consumption. It was hypothesized that biocathode catalytic activity would be affected by the applied potentials that initiate electron transfer. While inorganic carbon, in the form of bicarbonate, could be a main carbon source for biocathode growth, sulfate could be a terminal electron acceptor and thus reduced to elemental sulfurs. It was found that potentials more negative than -0.8 V (vs. standard hydrogen electrode) were required for hydrogen production by the biocathode. In additional, a maximum hydrogen production was observed at sulfate and bicarbonate concentrations of 288 and 610 mg/L respectively. Organic carbons were found in the cathode effluents, suggesting that microbial interactions probably happen between acetogens and sulfate reducing bacteria (SRB). The hydrogen-producing biocathode was sulfate-dependent and hydrogen production could be inhibited by excessive sulfate because more energy was directed to reduce sulfate ( E ° SO 4 2 - /H 2 S = -0.35 V) than proton ( E ° H + /H 2 = -0.41 V). This resulted in a restriction to the hydrogen production when sulfate concentration was high. Domestic wastewaters contain low amounts of organic compounds and sulfate would be a better medium to enrich and maintain a hydrogen-producing biocathode dominated by SRB. Besides the risks of limited mass transport and precipitation caused by low potential, methane contamination in the hydrogen-rich environment was inevitable in the biocathode after long term operation due to methanogenic activities.
Nhlanganiso Ivan Madondo, Sudesh Rathilal, Babatunde Femi Bakare et al.
International Journal of Molecular Sciences · 2023
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