Discover insights from thousands of peer-reviewed papers on microbial electrochemical systems
Jiaohui Xia, Dan Chen, Cheng Hou et al.
Bioresource Technology · 2021
Nitrogen removal based on short-cut nitrification (SCN) have attract more attentions, in which stable nitrite accumulation is prerequisite. In this study, different reductive potential was applied to inhibit nitrite oxidizing bacteria for achievement of SCN in aerobic cathode chamber of bioelectrochemical systems with dissolved oxygen concentration of 3.5 mg/L. The results demonstrated that the applied potential facilitated nitrite accumulation with high ammonia oxidation rates. The maximum nitrate accumulation rate of 87.61% was obtained at -800 mV. The abundance of Nitrosomonas and Thauera increased while Nitrospira abundance declined with more negative reductive potentials. The activity of nitric oxide reductase was also evidently inhibited. The above-mentioned three genera were the keystone taxa in co-occurrence network with high degree and closeness centrality. Interestingly, total nitrogen (TN) removal was enhanced simultaneously in the absence of external organic carbon. Reductive potential would be a promising approach for achieving SCN and simultaneously TN removal.
V. S. Bueschler, G. V. Sayoga, H. Beisch et al.
Chemie Ingenieur Technik · 2022
Lili Tian, Chengmei Liao, Xuejun Yan et al.
Journal of Hazardous Materials · 2023
G. V. Sayoga, V. S. Bueschler, H. Beisch et al.
Chemie Ingenieur Technik · 2022
Tatiana Kuleshova, Elizaveta Ezerina, Vitaly Vertebny et al.
International Journal of Hydrogen Energy · 2024
Hesamoddin Rabiee, Lei Ge, Shihu Hu et al.
Chemical Engineering Journal · 2022
Bo Cao, Ting Zhao, Yanhong Ge et al.
Chemical Engineering Journal · 2025
Yolina Hubenova, Galin Borisov, Evelina Slavcheva et al.
Bioelectrochemistry · 2022
A novel strain of Gram-positive bacteria Paenibacillus profundus YoMME was recognized by sequencing of 16S rRNA gene and after that tested for exoelectrogenicity for the first time. It was found that at an applied potential of -0.195 V (vs. SHE) the bacteria are capable of generating electricity and forming electroactive biofilms for 3-4 days. A tendency for the decrease in double-layer capacitance and the increase in the charge transfer resistance during the maturation of the biofilm was established. The formed bioanodes were used as a part of a membrane-electrode assembly (MEA) together with a selected cathode (E-Tek) and a separator (Zirfon). The applicability of MEA with the bioanode was tested by operating a newly designed bioelectrochemical system in a microbial fuel cell (MFC) or microbial electrolysis cell (MEC) mode. A current density of 200 mA m -2 was generated by the MFC after the improvement of the cathodic reaction through facilitated air access. The Coulombic efficiency in different MFC runs ranged from 5.2 to 7.4%. It was also determined that 0.65 V applied cell voltage is appropriate for the operation of the cell in the electrolysis mode, during which a current density of 2-3 Am -2 was reached. This, along with the evolved gas on the cathode, shows that as an anodic biocatalyst P. profundus YoMME assists the electrolysis processes at a significantly lower voltage than the theoretical one (1.23 V) for water decomposition. The hydrogen production rate varied between 0.5 and 0.7 m 3 /m 3 d and the cathodic hydrogen recovery ranged from 49.5 to 61.5 %. The estimated energy efficiency based on the electricity input exceeds 100 %, which indicates that additional energy is being gained from the biotic oxidation of the available organics.
Jiawei Xie, Xinyi Zou, Yaofeng Chang et al.
Bioresource Technology · 2021
Fei Guo, Jerome T. Babauta, Haluk Beyenal
Bioresource Technology · 2021
Gaurav Kalia, Shashwat Mishra, Paramjeet Singh et al.
Materials Today: Proceedings · 2022
Zhen Fang, Jiani Hu, Meng-Yuan Xu et al.
Bioelectrochemistry · 2024
Bidirectional electron transfer is about that exoelectrogens produce bioelectricity via extracellular electron transfer at anode and drive cytoplasmic biochemical reactions via extracellular electron uptake at cathode. The key factor to determine above bioelectrochemical performances is the electron transfer efficiency under biocompatible abiotic/biotic interface. Here, a graphene/polyaniline (GO/PANI) nanocomposite electrode specially interfacing exoelectrogens (Shewanella loihica) and augmenting bidirectional electron transfer was conducted by in-situ electrochemical modification on carbon paper (CP). Impressively, the GO/PANI@CP electrode tremendously improved the performance of exoelectrogens at anode for wastewater treatment and bioelectricity generation (about 54 folds increase of power density compared to blank CP electrode). The bacteria on electrode surface not only showed fast electron release but also exhibited high electricity density of extracellular electron uptake through the proposed direct electron transfer pathway. Thus, the cathode applications of microbial electrosynthesis and bio-denitrification were developed via GO/PANI@CP electrode, which assisted the close contact between microbial outer-membrane cytochromes and nanocomposite electrode for efficient nitrate removal (0.333 mM/h). Overall, nanocomposite modified electrode with biocompatible interfaces has great potential to enhance bioelectrochemical reactions with exoelectrogens.
, Se Min Kim, Rajkumar Patel et al.
Membrane Journal · 2021
Harsha Nagar, Vineet Aniya, Ch. Saranya
Journal of Environmental Chemical Engineering · 2021
Sudipta Mondal, Farhan Papiya, Saumendra Nath Ash et al.
Journal of Environmental Chemical Engineering · 2021
Mahdi Shahparasti, Amirhossein Rajaei, Andres Tarrassó et al.
Energy · 2022
Wenbin Liu, Leiming Lin, Yukang Qie et al.
Resources, Conservation and Recycling · 2022
Yaping Zhang, Yangao Xu, Xi Chen et al.
Chemosphere · 2021
Toxic metal ions were previously found to be effective removed by anodic biofilms under the coexistence of organics in bioelectrochemical system (BES). However, the effect of toxic metal ions on the organics fermentation pathways remains unclear. To investigate the pathway systematically, the glucose fermentation pathways were discussed under different Cu 2+ concentrations. After introducing Cu 2+ , more acetate and less propionate were observed, implying that the metabolic reaction of glucose fermentation altered from mixed acid type to acetogenesis type. This pattern produced more "food" (acetate or hydrogen) for methanogens, thus, the methane content increased by 19.67%, 39.51%, and 27.71% in the presence of 0.1, 1, and 7 mg L -1 Cu 2+ compared to the blank, respectively. Increased Cu 2+ concentrations resulted in the decrease of current production, which was associated with the decrease of electricigen (Geobacter). Consistent with the change of fermentation type, the fermenters (Klebsiella and norank_f__norank_o__Bacteroidales) that related to the production of acetate increased, while the dominant methanogens (Methaospirillum) didn't decrease until the Cu 2+ concentration reached 7 mg L -1 .
Wei Wang, Jo-Shu Chang, Duu-Jong Lee
Bioresource Technology · 2022
Strategies for enhancing performance of anaerobic digestion (AD) process has been widely studied. The bioelectrochemical system (BES), including microbial fuel cell, microbial electrolysis cell (MEC), microbial desalination cell, and microbial electrosynthesis, had been proposed to integrate with AD for performance enhancement. This mini-review summarizes the current researches that integrated AD with BES to enhance the performance of the former. The working principles of BES were introduced. The integrated configurations of AD-BES as well as the associated applications were summarized. The statistics analysis for AD-MEC performances reported in literature were then performed to confirm the effects of reactor size and applied voltage on the methane productivity and enhancement. The challenges and prospects of the integrated AD-BES were delineated, and the potential scenarios of applying integrated AD-BES in field were discussed.
Yi-Xuan Wang, Xiao-Li Liu, Wen-Qiang Li et al.
Water Research · 2024
Muhammet Güler, Adem Zengin, Murat Alay
Analytical Biochemistry · 2023
Zhen Fang, Qichao Fan, Jiani Hu et al.
Journal of Environmental Chemical Engineering · 2025
Tingli Ren, Yuanfeng Liu, Congju Li
Chinese Chemical Letters · 2025
Boris Tartakovsky, Frédérique Lebrun, Serge R. Guiot et al.
Sustainable Energy Technologies and Assessments · 2021
Mihai-Cristian Fera, Rita R. Manuel, Inês A.C. Pereira et al.
Carbon · 2023
Ramineh Rad, Tito Gehring, Kevinjeorjios Pellumbi et al.
Cell Reports Physical Science · 2023
René Cardeña, László Koók, Jan Žitka et al.
Bioresource Technology · 2021
This work characterizes and comparatively assess two cation exchange membranes (PSEBS SU22 and CF22 R14) and one bipolar membrane (FBM) in microbial electrolysis cells (MEC), fed either by acetate or the mixture of volatile fatty acids as substrates. The PSEBS SU22 is a new, patent-pending material, while the CF22 R14 and FBM are developmental and commercialized products. Based on the various MEC performance measures, membranes were ranked by the EXPROM-2 method to reveal which of the polymeric membranes could be more beneficial from a complex, H 2 production efficiency viewpoint. It turned out that the substrate-type influenced the application potential of the membranes. Still, in total, the PSEBS SU22 was found competitive with the other alternative materials. The evaluation of MEC was also supported by analyzing anodic biofilms following electroactive bacteria's development over time.
Kaliaperumal Keruthiga, Samsudeen Naina Mohamed, Nagarajan Nagendra Gandhi et al.
International Journal of Hydrogen Energy · 2021
K. Keruthiga, N. Samsudeen, N. Nagendra Gandhi et al.
Journal of The Institution of Engineers (India): Series E · 2023
Uriel Roberto Pedroza-Medina, Luis Felipe Cházaro-Ruiz, Ricardo Femat et al.
Chemical Engineering and Processing - Process Intensification · 2024
Shinojus Lovelin Golda Anitus, Anchana Devi Chenniappan, Alison Christina Fernandez et al.
Asian Journal of Biological and Life Sciences · 2025
Mohamad Afiq Mohd Asrul, Mohd Farid Atan, Hafizah Abdul Halim Yun et al.
International Journal of Hydrogen Energy · 2021
Amit Kumar Chaurasia, Ravi Shankar, Prasenjit Mondal
Journal of Environmental Management · 2021
Jayachitra Murugaiyan, Anantharaman Narayanan, Samsudeen Naina Mohamed
International Journal of Energy Research · 2022
Abhispa Bora, K. Mohanrasu, T. Angelin Swetha et al.
Fuel · 2022
Gabriel Khew Mun Hong, Mohd Azlan Hussain, Ahmad Khairi Abdul Wahab
Chinese Journal of Chemical Engineering · 2021
Divyanshu Sikarwar, Indrasis Das, Anusha Ganta et al.
Sustainable Chemistry for the Environment · 2025
Hyung-Sool Lee, Wang Xin, Ranaprathap Katakojwala et al.
Bioresource Technology · 2022
To assess biohydrogen for future green energy, this review revisited dark fermentation and microbial electrolysis cells (MECs). Hydrogen evolution rate in mesophilic dark fermentation is as high as 192 m 3 H 2 /m 3 -d, however hydrogen yield is limited. MECs are ideal for improving hydrogen yield from carboxylate accumulated from dark fermentation, whereas hydrogen production rate is too slow in MECs. Hence, improving anode kinetic is very important for realizing MEC biohydrogen. Intracellular electron transfer (IET) and extracellular electron transfer (EET) can limit current density in MECs, which is proportional to hydrogen evolution rate. EET does not limit current density once electrically conductive biofilms are formed on anodes, potentially producing 300 A/m 2 . Hence, IET kinetics mainly govern current density in MECs. Among parameters associated with IET kinetic, population of anode-respiring bacteria in anode biofilms, biofilm density of active microorganisms, biofilm thickness, and alkalinity are critical for current density.
A. Saravanan, S. Karishma, P. Senthil Kumar et al.
Biomass Conversion and Biorefinery · 2023
Tamilmani Jayabalan, Manickam Matheswaran, T.K. Radhakrishnan et al.
Bioresource Technology · 2021
Biohydrogen production in Microbial Electrolysis Cell (MEC) had inspired the researchers to overcome the challenges associated towards sustainability. Despite microbial community and various substrates, economical cathode catalyst development is most significant factor for enhancing hydrogen production in the MEC. Hence, in this study, the performance of MEC was investigated with a sugar industry effluent (COD 4200 ± 20 mg/L) with graphite anode and modified Nickel foam (NF) cathode. Nickel molybdate (NiMoO 4 ) coated NF achieved a higher hydrogen production rate 0.12 ± 0.01 L.L -1 D -1 as compared to control under favorable conditions. Electrochemical characterizations demonstrated that the improved catalytic activity of novel nanocatalyst with lower impedance favoring faster hydrogen evolution kinetics. The MEC with the novel catalyst performed with 58.2% coloumbic efficiency, 20.36% cathodic hydrogen recovery, 11.96% overall hydrogen recovery and 54.38% COD removal efficiency for a 250 mL substrate during 5 days' batch cycle. Hence, the potentiality of modified cathode was established with the real time industrial effluent highlighting the waste to wealth bio-electrochemical technology.