Article
Environmental Sciences
Yanli Guo, Zhuang Chen, Shaohui Zhang
Summary: This study investigated a new startup strategy and operation performance for methane-fueled microbial fuel cells (MFCs), successfully starting up the MFC in a short time by pre-cultivating an adapted culture and optimizing conditions with increased concentrations of molybdenum and tungsten. The methane-fueled MFC achieved a maximum power density of 166 mW/m(3), demonstrating the effectiveness of the new startup strategy and operational conditions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Review
Environmental Sciences
Mochamad Arief Budihardjo, Syafrudin, Agus Jatnika Effendi, Syarif Hidayat, Candra Purnawan, Ayudya Izzati Dyah Lantasi, Fadel Iqbal Muhammad, Bimastyaji Surya Ramadan
Summary: This review article discusses the potential of solid-phase microbial fuel cells as a source of electrical energy from solid waste processing. It highlights the advantages and challenges of using SMFCs for treating solid waste, and notes that optimizing key factors can increase electricity generation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Chemistry, Physical
Chengzhi Wang, Yi Xing, Xiaolin Zhu, Xing Yuan, Jiao Qu, Huizi Zheng, Dexin Jin
Summary: An aerobic single-chamber microbial fuel cell (MFC) system with a photocatalytic-bioelectrochemical anode has been constructed for the efficient degradation of o-chlorophenol. The utilization of dissolved oxygen (DO) enhances the removal of o-chlorophenol through photocatalytic and biological processes. The degradation efficiency of o-chlorophenol is significantly improved, and the abundance of specific bacteria involved in degradation and electricity production is increased.
JOURNAL OF POWER SOURCES
(2022)
Article
Environmental Sciences
Lei Jiang, Yi-Xuan Chu, Xuan Zhang, Jing Wang, Xiaosong He, Chen-Yang Liu, Ting Chen, Ruo He
Summary: This study investigated the anaerobic oxidation of methane (AOM) activity and communities of methane-oxidizing bacteria in three informal landfills. The AOM rate was highest in the landfill with aeration, and the NO2--N content was positively correlated with the AOM rate. Gamma-Proteobacteria methanotrophs, especially Methylobacter, were abundant in the landfilled waste. The relative abundance of various methanotrophs was positively correlated with the contents of NO2--N in the landfilled waste samples.
ENVIRONMENTAL RESEARCH
(2022)
Article
Agricultural Engineering
Federico Moretta, Eleonora Rizzo, Flavio Manenti, Giulia Bozzano
Summary: An upgraded digital twin of the Anaerobic Digestion Model 1 has been proposed to enhance its industrial applicability and range of use. The model can predict biogas fractions more precisely without any parametric adjustment, and has been validated through comparison with literature models and experimental data. An optimization of methane content through oxygen rate adjustment is suggested. The mathematical model was built using PythonTM, making it easily spreadable and usable.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Supriya Gupta, Ashmita Patro, Yamini Mittal, Saurabh Dwivedi, Palak Saket, Rupobrata Panja, Tanveer Saeed, Fernando Martinez, Asheesh Kumar Yadav
Summary: Microbial fuel cell (MFC) is a promising technology that converts chemical energy into electricity. This review examines the development of MFC technology from the lab to the field, including different variants such as sediment-microbial fuel cell (S-MFC), plant-microbial fuel cell (P-MFC), and integrated constructed wetlands-microbial fuel cell (CW-MFC). The review also evaluates the commercialization potential and challenges of these technologies.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Bing Guo, Najiaowa Yu, David G. Weissbrodt, Yang Liu
Summary: This study explored the impact of different micro-aeration dosages on anaerobic digestion of blackwater. Results showed that low oxygen dosages led to higher methane production efficiency, while high oxygen dosages resulted in more volatile fatty acids accumulation. Microbial communities and antimicrobial resistance genes were also affected by the oxygen dosages, indicating the potential for controlling ARG profiles through micro-aeration in AD processes.
Review
Environmental Sciences
Fei Guo, Huiqin Luo, Zongyang Shi, Yan Wu, Hong Liu
Summary: Substrate salinity plays a critical role in the performance of microbial fuel cells (MFCs), with moderate increases improving performance but excessive salinity causing negative effects. Different MFCs have optimal salinity ranges, and strategies for improving salt tolerance in electroactive bacteria can enhance performance. In addition to ohmic resistance and bacterial activity, substrate salinity also affects membrane resistance and catalyst performance, all of which contribute to the overall MFC performance.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Agricultural Engineering
Sudheera Yaparatne, Zachary E. Doherty, Andre L. Magdaleno, Emily E. Matula, Jean D. MacRae, Sergi Garcia-Segura, Onur G. Apul
Summary: Nanobubble aeration showed potential in enhancing aerobic activated sludge treatment by increasing dissolved oxygen levels and improving chemical oxygen demand removal. It also resulted in reduced filamentous bacteria and specific bacterial populations in the sludge.
BIORESOURCE TECHNOLOGY
(2022)
Article
Green & Sustainable Science & Technology
Thomas K. Wood, Ilke Gurgan, Ethan T. Howley, Ingmar H. Riedel-Kruse
Summary: The anaerobic oxidation of methane (AOM) in microbial fuel cells (MFCs) shows great promise in converting methane into electricity and value-added chemicals. By integrating different technologies, the performance of AOM MFCs can be significantly improved, leading to sustainable energy production.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Engineering, Environmental
V. A. Haaksman, M. Schouteren, M. C. M. van Loosdrecht, M. Pronk
Summary: This study compared two different anaerobic contact modes, bottom-feeding and completely mixed pulse-feeding, and found that bottom-feeding can distribute sewage more evenly across different granule sizes, while completely mixed pulse-feeding allows for a more equal distribution of sewage across all granules. The anaerobic contact mode directly affects the distribution of sewage on the granules.
Article
Polymer Science
Ahmet Erensoy, Nurettin cek
Summary: This study investigated the relationship between biofilm formation on the titanium-based anode electrode surface and the chemical composition of the substrate in microbial fuel cells (MFCs). MFCs made with poplar wood shavings as substrate showed that the MFC containing 20% wood shavings provided the highest open circuit voltage and power density. Optical microscopy examinations revealed the presence of Bacillus and Coccus species of bacteria in the soil structure and around the fiber of poplar wood shavings in MFCs.
Article
Environmental Sciences
Jordan R. Day, Elizabeth S. Heidrich, Toby S. Wood
Summary: Mathematical modelling is increasingly used in microbial electrochemical technologies to reduce design costs and time. A scalable model is presented for simulating fluid flow and bioelectrochemical processes in microbial fuel cells, benchmarked against an experimental bioreactor. The model describes substrate transport and biofilm growth, and reveals significant spatial variations in both substrate concentration and current density.
Article
Green & Sustainable Science & Technology
Walter Rojas-Villacorta, Segundo Rojas-Flores, Santiago M. Benites, Renny Nazario-Naveda, Cecilia V. Romero, Moises Gallozzo-Cardenas, Daniel Delfin-Narciso, Felix Diaz, Emzon Murga-Torres
Summary: Agricultural waste has negative impacts on the environment and creates economic difficulties for agro-industrial companies and farmers. Therefore, this study aimed to explore the use of lettuce waste as a sustainable substrate for generating bioelectricity in single-chamber microbial fuel cells. The results showed that the peak voltage and current were 0.959 ± 0.026 V and 5.697 ± 0.065 mA on the fourteenth day, with an optimal pH of 7.867 ± 0.147 and electrical conductivity of 118.964 ± 8.888 mS/cm. The maximum power density was calculated to be 378.145 ± 5.417 mW/cm², and the internal resistance was 87.594 ± 6.226 Ω according to Ohm's Law. Furthermore, the presence of Stenotrophomonas maltophilia bacterium (99.59%) in the anodic biofilm was identified on a molecular scale. Finally, three microbial fuel cells connected in series were able to power an LED bulb with a voltage of 2.18 V.
Article
Environmental Sciences
Aryama Raychaudhuri, Rudra Narayan Sahoo, Manaswini Behera
Summary: This study investigated the treatment of rice mill wastewater in a dual-chamber microbial fuel cell (MFC) with a biological cathode (MFCB). The results showed that the MFCB had a higher chemical oxygen demand (COD) removal efficiency, but lower power density and electrochemical activity compared to an identical MFC with an abiotic cathode (MFCA).
ENVIRONMENTAL TECHNOLOGY
(2023)