Shuai Luo, Boya Fu, Fubin Liu et al.

Water Research • 2020

Liming Yang, Genping Yi, Yanan Hou et al.

Biosensors and Bioelectronics • 2019

Fanying Kong, Hong‐Yu Ren, Dong Liu et al.

Bioresource Technology • 2022

Leire Caizán‐Juanarena, Tom Sleutels, Casper Borsje et al.

Renewable Energy • 2020

In the last decades, the research in Microbial Fuel Cells (MFCs) has expanded from electricity production and wastewater treatment to remediation technologies, chemicals production and low power applications. More recently, capacitors have been implemented to boost the power output of these systems when applied as wastewater treatment technology. Specifically, the use of granular capacitive materials (e.g. activated carbon granules) as bioanodes has opened up new opportunities for reactor designs and upscaling of the technology. One of the main features of these systems is that charge and discharge processes can be separated, which offers multiple advantages over more conventional reactor types. In this manuscript, we discuss several aspects to consider for the application of capacitive granules as bioanodes in MFCs and other bioelectrochemical systems, as well as the recent advances that have been made in applying these granules in various reactor systems. Similarly, we discuss the granule properties that are key to determine system operation and performance, and show that biofilm growth is highly dependent on the efficiency of discharge.

Ahmed AlSayed, Moomen Soliman, Ahmed Eldyasti

Renewable and Sustainable Energy Reviews • 2020

Heunggu Kang, Eojin Kim, Sokhee P. Jung

International Journal of Hydrogen Energy • 2017

Yingke Fang, Hong‐Cheng Wang, Jinglong Han et al.

Journal of Cleaner Production • 2022

Hui Yun, Bin Liang, Deyong Kong et al.

Chemosphere • 2017

Shadi Rahimi, Oskar Modin, Fariba Roshanzamir et al.

Chemical Engineering Journal • 2020

Bio-augmentation could be a promising strategy to improve processes for treatment and resource recovery from wastewater. In this study, the Gram-positive bacterium Bacillus subtilis was co-cultured with the microbial communities present in wastewater samples with high concentrations of nitrate or ammonium. Glucose supplementation (1%) was used to boost biomass growth in all wastewater samples. In anaerobic conditions, the indigenous microbial community bio-augmented with B. subtilis was able to rapidly remove nitrate from wastewater. In these conditions, B. subtilis overexpressed nitrogen assimilatory and respiratory genes including nasD, nasE, narG, narH, and narI, which arguably accounted for the observed boost in denitrification. Next, we attempted to use the ammonium- and nitrate-enriched wastewater samples bio-augmented with B. subtilis in the cathodic compartment of bioelectrochemical systems (BES) operated in anaerobic condition. B. subtilis only had low relative abundance in the microbial community, but bio-augmentation promoted the growth of Clostridium butyricum and C. beijerinckii, which became the dominant species. Both bio-augmentation with B. subtilis and electrical current from the cathode in the BES promoted butyrate production during fermentation of glucose. A concentration of 3.4 g/L butyrate was reached with a combination of cathodic current and bio-augmentation in ammonium-enriched wastewater. With nitrate-enriched wastewater, the BES effectively removed nitrate reaching 3.2 mg/L after 48 h. In addition, 3.9 g/L butyrate was produced. We propose that bio-augmentation of wastewater with B. subtilis in combination with bioelectrochemical processes could both boost denitrification in nitrate-containing wastewater and enable commercial production of butyrate from carbohydrate- containing wastewater, e.g. dairy industry discharges. These results suggest that B. subtilis bio-augmentation in our BES promotes simultaneous wastewater treatment and butyrate production.

Masapogu Yellappa, J. Shanthi Sravan, Omprakash Sarkar et al.

Bioresource Technology • 2019

Young‐Chae Song, Anna Joicy, Seong‐Ho Jang

International Journal of Hydrogen Energy • 2018

Gunda Mohanakrishna, Ibrahim M. Abu-Reesh, Sanath Kondaveeti et al.

Bioresource Technology • 2018

Anna Joicy, Young‐Chae Song, Chae-Young Lee

Journal of Environmental Management • 2018

Brigitte Delord, Wilfrid Néri, Karen Bertaux et al.

Bioresource Technology • 2017

Matteo Grattieri, Milomir Suvira, Kamrul Hasan et al.

Journal of Power Sources • 2016

Erick M. Bosire, Lars M. Blank, Miriam A. Rosenbaum

Applied and Environmental Microbiology • 2016

Microbial fuel cells and other microbial bioelectrochemical systems hold great promise for environmental technologies such as wastewater treatment and bioremediation. While there is much emphasis on the development of materials and devices to realize such systems, the investigation and a deeper understanding of the underlying microbiology and ecology are lagging behind. Physiological investigations focus on microorganisms exhibiting direct electron transfer in pure culture systems. Meanwhile, mediated electron transfer with natural redox compounds produced by, for example, Pseudomonas aeruginosa might enable an entire microbial community to access a solid electrode as an alternative electron acceptor. To better understand the ecological relationships between mediator producers and mediator utilizers, we here present a comparison of the phenazine-dependent electroactivities of three Pseudomonas strains. This work forms the foundation for more complex coculture investigations of mediated electron transfer in microbial fuel cells.

Song Wang, Xueting Wang, Mathias Fessler et al.

Water Research • 2022

Bioelectrochemical anaerobic digestion (BEAD) is a promising next-generation technology for simultaneous wastewater treatment and bioenergy recovery. While knowledge on the inhibitory effect of emerging pollutants, such as microplastics, on the conventional wastewater anaerobic digestion processes is increasing, the impact of microplastics on the BEAD process remains unknown. This study shows that methane production decreased by 30.71% when adding 10 mg/L polyethylene microplastics (PE-MP) to the BEAD systems. The morphology of anaerobic granular sludge, which was the biocatalysts in the BEAD, changed with microbes shedding and granule crack when PE-MP existed. Additionally, the presence of PE-MP shifted the microbial communities, leading to a lower diversity but higher richness and tight clustering. Moreover, fewer fermentative bacteria, acetogens, and hydrogenotrophic methanogens (BEAD enhanced) grew under PE-MP stress, suggesting that PE-MP had an inhibitory effect on the methanogenic pathways. Furthermore, the abundance of genes relevant to extracellular electron transfer (omcB and mtrC) and methanogens (hupL and mcrA) decreased. The electron transfer efficiency reduced with extracellular cytochrome c down and a lower electron transfer system activity. Finally, phylogenetic investigation of communities by reconstruction of unobserved states analysis predicted the decrease of key methanogenic enzymes, including EC 1.1.1.1 (Alcohol dehydrogenase), EC 1.2.99.5 (Formylmethanofuran dehydrogenase), and EC 2.8.4.1 (Coenzyme-B sulfoethylthiotransferase). Altogether, these results provide insight into the inhibition mechanism of microplastics in wastewater methane recovery and further optimisation of the BEAD process.

Arianna Callegari, Daniele Cecconet, Daniele Molognoni et al.

Journal of Cleaner Production • 2018

Lingen Zhang, Zhenming Xu, Zhen He

Journal of Hazardous Materials • 2019

Yang Li, Yaobin Zhang, Yiwen Liu et al.

Bioresource Technology • 2016

Surajbhan Sevda, Vijay Kumar Garlapati, Swati Sharma et al.

Bioresource Technology Reports • 2019

Galina Pankratova, Lo Gorton

Current Opinion in Electrochemistry • 2017

Min-Hua Cui, Dan Cui, Lei Gao et al.

Electrochimica Acta • 2016

Qing Feng, Young‐Chae Song, Kyuseon Yoo et al.

International Journal of Hydrogen Energy • 2017

Zhi Hu, Jin Li, Yulong Zhang et al.

Water Research • 2022

Aijie Wang, Hong‐Cheng Wang, Hao-Yi Cheng et al.

Environmental Science and Ecotechnology • 2020

Bioelectrochemical systems (BESs) have been studied extensively during the past decades owing primarily to their versatility and potential in addressing the water-energy-resource nexus. In stark contrast to the significant advancements that have been made in developing innovative processes for pollution control and bioresource/bioenergy recovery, minimal progress has been achieved in demonstrating the feasibility of BESs in scaled-up applications. This lack of scaled-up demonstration could be ascribed to the absence of suitable electrode modules (EMs) engineered for large-scale application. In this study, we report a scalable composite-engineered EM (total volume of 1 m 3 ), fabricated using graphite-coated stainless steel and carbon felt, that allows integrating BESs into mainstream wastewater treatment technologies. The cost-effectiveness and easy scalability of this EM provides a viable and clear path to facilitate the transition between the success of the lab studies and applications of BESs to solve multiple pressing environmental issues at full-scale.

Sanjay Kumar Gupta, Rachna, Bhaskar Singh et al.

Sustainable Energy Technologies and Assessments • 2021

Shengnan Li, Tao Hua, Fengxiang Li et al.

Journal of Chemical Technology & Biotechnology • 2020

Abstract Bio‐electro‐Fenton processes use biological electrons produced from bioelectrochemical systems to treat wastewater. The most significant advantages of bio‐electro‐Fenton systems are high effectiveness, low toxicity, gentle operation conditions, environmentally friendly treatment without sludge accumulation and energy conservation. Though promising, bio‐electro‐Fenton systems still face several challenges, such as high power density, H 2 O 2 concentration, cathode materials, Fe 2+ concentration and pH. This review comprehensively discusses the mechanisms of bio‐electro‐Fenton systems. Then, structural configurations are critically reviewed, including microbial fuel cells coupled with electro‐Fenton systems, microbial electrolysis cells coupled with electro‐Fenton systems and other bioelectrochemical systems coupled with electro‐Fenton systems. Furthermore, recent advances in bio‐electro‐Fenton systems for wastewater treatment are introduced, including dye solution, pharmaceuticals and personal care products, oily wastewater, landfill leachate and other pollutants. In addition, the current challenges and specific future prospects of bio‐electro‐Fenton, such as possible mechanisms for improving the power output, electrode materials that are potentially useful, self‐designed electrodes and methods of maintaining circumneutral pH values, are also explored. Heretofore, great progress in bio‐electro‐Fenton has been made, but further improvements are still needed in order to make this system more economical and practical. © 2020 Society of Chemical Industry

Smita S. Kumar, Vivek Kumar, Veera Gnaneswar Gude et al.

Bioresource Technology • 2020

Min-Hua Cui, Dan Cui, Lei Gao et al.

Water Research • 2016

Tom Sleutels, Sam D. Molenaar, Annemiek ter Heijne et al.

Microorganisms • 2016

A crucial aspect for the application of bioelectrochemical systems (BESs) as a wastewater treatment technology is the efficient oxidation of complex substrates by the bioanode, which is reflected in high Coulombic efficiency (CE). To achieve high CE, it is essential to give a competitive advantage to electrogens over methanogens. Factors that affect CE in bioanodes are, amongst others, the type of wastewater, anode potential, substrate concentration and pH. In this paper, we focus on acetate as a substrate and analyze the competition between methanogens and electrogens from a thermodynamic and kinetic point of view. We reviewed experimental data from earlier studies and propose that low substrate loading in combination with a sufficiently high anode overpotential plays a key-role in achieving high CE. Low substrate loading is a proven strategy against methanogenic activity in large-scale reactors for sulfate reduction. The combination of low substrate loading with sufficiently high overpotential is essential because it results in favorable growth kinetics of electrogens compared to methanogens. To achieve high current density in combination with low substrate concentrations, it is essential to have a high specific anode surface area. New reactor designs with these features are essential for BESs to be successful in wastewater treatment in the future.

Xi Chen, Han Zhou, Kuichang Zuo et al.

Chemical Engineering Journal • 2017

Waheed Miran, Mohsin Nawaz, Jiseon Jang et al.

Water Research • 2017

Lijuan Deng, Huu Hao Ngo, Wenshan Guo et al.

Chemical Engineering Journal • 2018

Lixia Jia, Ruigang Wang, Haiming Wu

Chemical Engineering Journal • 2025

Hui Wang, Qixing Zhou

Journal of Cleaner Production • 2024

Thomas J. Arana, Veera Gnaneswar Gude

International Biodeterioration & Biodegradation • 2018

Jafar Ali, Lei Wang, Hassan Waseem et al.

Journal of Cleaner Production • 2019

Wenjie He, Quanfa Zhong, Junyang Liu et al.

Chemical Engineering Journal • 2023

Yuanyao Ye, Huu Hao Ngo, Wenshan Guo et al.

Chemical Engineering Journal • 2018