Review
Energy & Fuels
Anusha Ganta, Yasser Bashir, Sovik Das
Summary: This article explores the feasibility of using microbial electrochemical technologies as an alternative to traditional methods for treating dairy wastewater, aiming to reduce energy consumption and purification costs. The article also discusses several obstacles in the real-world application and techno-economic assessment of these innovative technologies.
Article
Polymer Science
Pedro Perez-Rodriguez, Carlos A. Covarrubias-Gordillo, Jose A. Rodriguez-De la Garza, Cynthia L. Barrera-Martinez, Silvia Y. Martinez-Amador
Summary: In this study, composites of polyurethane and graphite and polyurethane and carbon nanofibers were synthesized and used as anodes in dual-compartment microbial fuel cells for wastewater treatment, achieving electrical energy generation and organic matter removal.
Article
Electrochemistry
Morgane Hoareau, Luc Etcheverry, Benjamin Erable, Alain Bergel
Summary: The microbial electrochemical snorkel (MES) is a cost-effective technology that reduces wastewater treatment costs by minimizing the need for aeration. Proper aeration can enhance MES potential and improve COD removal efficiency. Adjusting aeration zone and frequency is crucial for running MES in optimal conditions to increase efficiency and stability.
ELECTROCHIMICA ACTA
(2021)
Article
Biochemistry & Molecular Biology
Abdelrhman Mohamed, Hannah M. Zmuda, Phuc T. Ha, Erik R. Coats, Haluk Beyenal
Summary: The combinatio of polarized electrodes with microbial fuel cells has led to the development of a switchable dual-mode bioelectrochemical wastewater treatment system, showing improved COD removal efficiency in both laboratory and pilot scale systems.
BIOELECTROCHEMISTRY
(2021)
Article
Green & Sustainable Science & Technology
Mohammadreza Kamali, Yutong Guo, Tejraj M. Aminabhavi, Rouzbeh Abbassi, Raf Dewil, Lise Appels
Summary: Microbial fuel cells (MFCs) have the potential to simultaneously remove contaminants from wastewater and generate bioelectricity as a green and renewable source of energy. However, large-scale applications of these technologies face technical and economic issues related to the fabrication and performance of MFC components. Innovative approaches such as using waste-driven carbonaceous structures and novel fabrication techniques like 3-D printing are discussed to enhance the efficiency and reduce costs of MFCs. Integrations with other technologies and novel applications are reviewed for practical implementation of MFCs in sustainable wastewater treatment.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Review
Agricultural Engineering
Swati Das, Sovik Das, M. M. Ghangrekar
Summary: The review explores the application of quorum sensing (QS) mechanism in Microbial electrochemical technologies (METs) to enhance their performance and yield, providing guidance for researchers to integrate innovative QS mechanisms into METs for scalability.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
N'dah Joel Koffi, Satoshi Okabe
Summary: This study found that maintaining the air-cathode potential at +0.7 V vs. SHE in single-chamber air-cathode microbial fuel cells can enhance current generation, oxygen permeation, and NH4+-N and TN removal rates.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Ali Nawaz, Ikram ul Haq, Kinza Qaisar, Burcu Gunes, Saleha Ibadat Raja, Khola Mohyuddin, Haseeb Amin
Summary: This article introduces the role of microbial fuel cells in sustainable and viable electrical energy production, as well as its potential in wastewater treatment and bioelectricity production. The article also discusses the limitations of the technology and proposes possible ways to address its drawbacks.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Environmental Sciences
Xia Zhou, Gongxing Yan, Hasan Sh. Majdi, Binh Nguyen Le, Mohamed Amine Khadimallah, H. Elhosiny Ali, Hamid Assilzadeh
Summary: Microbial electrodeionization cells (MECs) have been researched for their potential applications in eliminating persistent pollutants, chemical synthesis, resource recovery, and biosensor development. However, MEC technology is still developing and faces significant obstacles for practical large-scale implementations. This review aims to investigate the use of MECs in sustainable wastewater treatment, discussing MEC technology concepts, electrodeionization component setup, MEC membranes, working mechanisms, and various microorganisms used. It also discusses the difficulties and prospective outcomes, aiming to provide scientists and engineers with the latest developments in MEC technologies and applications.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Jaecheul Yu, Younghyun Park, Evy Widyaningsih, Sunah Kim, Younggy Kim, Taeho Lee
Summary: Recent studies on microbial fuel cells (MFCs) using real wastewater have shown that they are primarily small in size, box-shaped, single-chambered, and operated under continuous flow mode with non-domestic wastewater. Despite low power production and energy recovery, these MFCs have demonstrated high COD removal efficiency.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Green & Sustainable Science & Technology
AbubakarMuh'd Sani, Nishit Savla, Soumya Pandit, Abhilasha Singh Mathuriya, Piyush K. Gupta, Namita Khanna, Rishi Pramod Babu, Sachin Kumar
Summary: The emergence of renewable energy technologies provides a significant advantage in converting organic wastes to bioenergy. Lignocellulosic biomass is considered to be a rich source of energy that can be utilized by microbial consortia to generate electricity in a microbial fuel cell.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Review
Energy & Fuels
Sufiyan Siddiqui, Pranshul Bhatnagar, Sahej Dhingra, Utkarsh Upadhyay, I. Sreedhar
Summary: In recent years, there has been an increasing demand for efficient and sustainable energy generation methods from waste products, as well as wastewater treatment, due to the exponential increase in effluent-laden wastewater from industries, the agricultural sector, and the food sector. Microbial fuel cells offer a potential solution to these issues by performing bioelectrochemical processes to generate power from organic biodegradable compounds. However, they still face economic and scientific challenges.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Article
Engineering, Chemical
Kai-Bo Pu, Teng-Teng Li, Jia-Yao Gao, Qing-Yun Chen, Kun Guo, Min Zhou, Chin-Tsan Wang, Yun-Hai Wang
Summary: This study successfully achieved the goal of generating electricity by constructing a floating flexible microbial fuel cell that floats on wastewater, with higher power performance than other similar floating microbial fuel cells. After 21 days of operation, it was found that this cell can efficiently degrade the chemical oxygen demand in wastewater, with lower cost.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Green & Sustainable Science & Technology
Ruina Liu, Youwei Lin, Gongdi Xu, Yongfeng Li, R. Premalatha, Karthik Chandran
Summary: In the current era of urbanization and industrialization, water pollution and energy generation are major concerns in the context of climate change. Microbial Fuel Cells offer sustainable solutions for renewable power systems, but face challenges in generating usable energy for wastewater treatment.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Article
Engineering, Environmental
Monika Sharma, El-Sayed Salama, Peng Zhang, Lihong Zhang, Xiaohong Xing, Jianwei Yue, Zhongzhong Song, Lan Nan, Su Yujun, Xiangkai Li
Summary: This review provides an overview of the latest research progress in microalgal-assisted microbial fuel cell technology, discussing the application strategies of microalgae in MFCs, addressing major concerns, and emphasizing the importance of genetic modification strategies for enhancing the performance of microalgal-assisted MFCs.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Microbiology
Maliheh Abdollahi, Sara Al Sbei, Miriam A. A. Rosenbaum, Falk Harnisch
Summary: Microbial electrosynthesis utilizes electrons from cathodes to drive the metabolism of microorganisms, converting CO2 into chemicals and fuels. However, the presence of oxygen from the anode reaction can be toxic and reduce efficiency, leading to a need for new reactor designs or alternative oxidation reactions.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Energy & Fuels
Francesco Scarabotti, Anne Kuchenbuch, Rene Kallies, Katja Buehler, Falk Harnisch
Summary: This study demonstrates that physiological cellular parameters of electroactive microorganisms can be non-invasively and in real-time obtained during early-stage biofilm formation at electrodes using a microfluidic electrochemical flow-cell. Parameters for mixed culture biofilm anodes formed at +150 mV vs. Ag/AgCl sat. KCl include lagt, CPR, t(d), RGR, and Y-Ne.
FRONTIERS IN ENERGY RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Niklas Teetz, Dirk Holtmann, Falk Harnisch, Markus Stoeckl
Summary: The chemical industry is shifting towards more sustainable and biobased processes, and coupling energy fluxes and feedstock utilization is crucial for optimizing process efficiencies. In this study, researchers successfully coupled Kolbe electrolysis with microbial conversion of the co-product hydrogen, resulting in superior process performances and overall efficiencies. This innovative approach provides a new direction for the sustainable development of the chemical industry.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Biotechnology & Applied Microbiology
Shixiang Dai, Falk Harnisch, Mohammad Sufian Bin-Hudari, Nina Sophie Keller, Carsten Vogt, Benjamin Korth
Summary: Microbial electrochemical technology (MET) has shown promise in treating wastewater contaminated with high sulfate concentrations. In this study, flow mode bioelectrochemical sulfate reduction was investigated and achieved comparable removal efficiencies to batch experiments, with significantly increased sulfate removal rates and Coulombic efficiencies. The advantage of flow operation is likely due to higher biomass, stable pH, and a better ratio between sulfate-reducing prokaryotes and homoacetogens.
MICROBIAL BIOTECHNOLOGY
(2023)
Article
Microbiology
Daniel Dzofou Ngoumelah, Falk Harnisch, Snorre Sulheim, Tonje Marita Bjerkan Heggeset, Ingvild Haugnes Aune, Alexander Wentzel, Joerg Kretzschmar
Summary: By optimizing the culture medium, this study successfully achieved growth and activity in Methanosarcina barkeri, Methanobacterium formicicum, and Methanothrix soehngenii. This finding provides a foundation for follow-up co-culture studies and demonstrates that the optimized culture medium can effectively support the growth of these methanogens.
FRONTIERS IN MICROBIOLOGY
(2023)
Review
Biotechnology & Applied Microbiology
Markus Stoeckl, Thomas Lange, Paniz Izadi, Sera Bolat, Niklas Teetz, Falk Harnisch, Dirk Holtmann
Summary: The transition of today's fossil fuel based chemical industry towards sustainable production requires improvements in current processes and the development of new bio-based synthesis routes. Gas diffusion electrodes (GDE) show promise for the electrochemical conversion of gaseous reactants such as CO2, and this article highlights their architecture, function, and application in CO2 conversion for subsequent biosynthesis. The review also discusses the use of GDE in microbial fuel cells and the generation of H2O2 for enzymatic reactions, as well as engineering aspects like scale-up and modeling of GDE-based processes.
BIOTECHNOLOGY AND BIOENGINEERING
(2023)
Article
Electrochemistry
Paniz Izadi, Aykut Kas, Philip Haus, Falk Harnisch
Summary: In a circular economy, carbon dioxide can be utilized by electrochemical CO2 reduction reaction (eCO2RR) to produce feed for microbial syntheses. However, the stability of eCO2RR at biocompatible conditions is currently limited to short-term operation. This study evaluates the parameters affecting the stability of eCO2RR performance over a long-term operation and discusses how to overcome these obstacles.
ELECTROCHIMICA ACTA
(2023)
Article
Engineering, Environmental
Benjamin Korth, Joao Pereira, Tom Sleutels, Falk Harnisch, Annemiek Ter Heijne
Summary: This study investigates the energy conversion and biomass yields of electroactive microorganisms (EAM). The results support the hypothesis of restricted energy harvest of EAM and call for an adjusted growth model to improve the understanding and modeling of their energy metabolism. The reported biomass yields are important parameters for designing strategies to influence the interactions between EAM and other microorganisms and assessing the feasibility of microbial electrochemical technologies.
Article
Electrochemistry
Aykut Kas, Paniz Izadi, Falk Harnisch
Summary: This study demonstrates the potential of using tin as an electrocatalyst in halophilic media for achieving maximum formate production rates in microbial synthesis. The findings lay the foundation for further research in this field.
Article
Chemistry, Multidisciplinary
Micjel Chavez Morejon, Nils Kurig, Yannick S. Tschauder, Falk Harnisch, Regina Palkovits
Summary: This study elucidates key parameters allowing the electrochemical valorization of cellobiose, by creating value-added products by both, anodic oxidation, and cathodic reduction. The first electrochemical reduction of cellobiose to cellobitol was achieved in a divided cell using Pb as cathode, with a conversion rate of up to 49% but with long reaction times (over 26 h) and low coulombic efficiency (4%). The successful synthesis of cellobionic acid was demonstrated by mediated oxidation in an undivided electrochemical cell, with cellobiose oxidation highly selective, achieving up to 92% conversion at 48% coulombic efficiency when using a charge of 2 FE.
Article
Chemistry, Multidisciplinary
Micjel Chavez Morejon, Alexander Franz, Rohan Karande, Falk Harnisch
Summary: We demonstrate a method for synthesizing adipic acid (AA), a key component of polyamides like Nylon-6,6, from lignin-derived feedstock using a combination of electrochemical hydrogenation and biotransformation. The electrochemical hydrogenation process achieves a 68% yield of cyclohexanol from phenol at a 69% coulombic efficiency, and the electrochemical hydrogenation of an aromatic mixture obtained from lignin depolymerization yields up to 83%. By further biotransformation with recombinant Pseudomonas taiwanensis VLB120, AA is produced at a rate of 0.02 g L-1 h(-1) with a yield of up to 61% in 5 hours.
Article
Chemistry, Multidisciplinary
Santiago T. T. Boto, Bettina Bardl, Falk Harnisch, Miriam A. A. Rosenbaum
Summary: Microbial electrosynthesis (MES) has great potential for recycling carbon dioxide into organic compounds, but the lack of process control and understanding of microbial extracellular electron transfer (EET) hinders further development. This study found that cathodic hydrogen is the dominant electron source for C. ljungdahlii in electroautotrophic MES, leading to superior growth and biosynthesis compared to previous studies. It was also discovered that MES using C. ljungdahlii can produce other products besides acetate, such as glycine and ethanolamine. Understanding the electrophysiology of C. ljungdahlii is key to improving bioprocess strategies in MES research.
Review
Microbiology
Washington Logrono, Sabine Kleinsteuber, Joerg Kretzschmar, Falk Harnisch, Jo De Vrieze, Marcell Nikolausz
FEMS MICROBIOLOGY REVIEWS
(2023)
Article
Engineering, Environmental
Yuting Guo, Luis F. M. Rosa, Yongping Shan, Falk Harnisch, Susann Mueller
Summary: The composition and functions of an anodic microbiome are crucial for both wastewater treatment and current production. The type of substrate and cultivation mode can affect the microorganisms' contribution to these functions. In a laminar flow bioelectrochemical system, the complexity of carbon sources influences the distribution of biomass and the efficiency of current production and carbon removal. Reactors fed with undefined wastewater showed similarities with those fed with acetate, while reactors fed with defined wastewater showed significant differences. The division of labor between current production and substrate degradation is independent of the provided substrates, but the efficiency and types of subcommunities involved depend on the substrates.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Energy & Fuels
Luis F. M. Rosa, Katharina Roehring, Falk Harnisch
Summary: In aviation, carbon-based liquid fuels with high mass and volume specific energy density are needed. This study demonstrates the scale-up production of aviation drop-in fuel-like mixtures from biomass through electrolysing medium chain carboxylic acids, achieving unprecedented electrolysis performance.