Discover insights from thousands of peer-reviewed papers on microbial electrochemical systems
Sandipam Srikanth, Manoj Kumar, Dheer Singh et al.
Bioresource Technology · 2016
Refinery wastewater (RW) treatment in microbial fuel cell (MFC) was studied in batch mode operation followed by continuous mode operation with 8h and 16h hydraulic retention time (HRT). The MFC performance was evaluated in terms of power density, organics removal, specific contaminants (oil & grease, phenol and sulfide) removal and energy conversion efficiency with respect to operation mode. Higher power density of 225±1.4mW/m 2 was observed during continuous mode operation with 16h HRT along with a substrate degradation of 84.4±0.8% including the 95±0.6 of oil content. The columbic efficiency during this operation was about 2±0.8% and the projected power yield was 340±20kWh/kg COD R /day. Batch mode operation also showed good substrate degradation (81±1.8%) but took longer HRT which resulted in significantly low substrate degradation rate (0.036±0.002kgCOD R /m 3 -day) over continuous mode operation (1.05±0.01kgCOD R /m 3 -day). Overall, current study depicted the possibility of utilizing RW as substrate in MFC for power generation along with its treatment.
Achiraya Sangcharoen, Witchayut Niyom, Benjaporn Boonchayaanant Suwannasilp
Process Biochemistry · 2015
Diana Guaya, Gianella Cuenca, Eda Mendoza et al.
Industrial Crops and Products · 2023
Fariba Mirzaienia, Ali Asadipour, Ahmad Jonidi Jafari et al.
Applied Water Science · 2017
Pooja Sharma, Ashutosh Kumar Pandey, Aswathy Udayan et al.
Bioresource Technology · 2021
Rui Liu, Yuling Zhang, Weitao Liu et al.
Frontiers in Microbiology · 2025
A.Y. Goren, H.E. Okten
Chemosphere · 2021
Xiao Li, Guangli Liu, Zhen He
Bioresource Technology · 2020
Juan J. L. Guzman, Diana Z. Sousa, Largus T. Angenent
Frontiers in Microbiology · 2019
Syntrophic microbial partnerships are found in many environments and play critical roles in wastewater treatment, global nutrient cycles, and gut systems. An important type of syntrophy for the anaerobic conversion of carboxylic acids is H 2 syntrophy. In this type of microbial partnership, dissolved H 2 is produced by a bacterium and rapidly consumed by an archeon (methanogen), resulting in methane gas. This is referred to as interspecies H 2 transfer, and some conversions rely on this mechanism to become thermodynamically feasible. For this reason, syntrophic partners are often not possible to separate in the lab, which hampers the full understanding of their physiology. Bioelectrochemical systems (BESs) may show promise to ultimately separate and study the behavior of the syntrophic bacterium by employing an abiotic H 2 oxidation reaction at the anode, actively removing dissolved H 2 . Here, we performed a proof-of-concept study to ascertain whether an H 2 -removing anode can: (1) provide a growth advantage for the syntrophic bacterium; and (2) compete with the methanogenic partner. A mathematical model was developed to design a BES to perform competition experiments. Indeed, the operated BES demonstrated the ability to provide a growth advantage to the syntrophic bacterium Syntrophus aciditrophicus compared to its methanogenic partner Methanospirillum hungatei when grown in co-culture. Further, the BES provided the never-before isolated Syntrophomonas zehnderi with a growth advantage compared to Methanobacterium formicicum . Our results demonstrate a potential to use this BES to enrich H 2 -sensitive syntrophic bacteria, and gives prospects for the development of an effective method for the separation of obligate syntrophs.
Guangtuan Huang, Ling Qu, Yi Ding
Desalination and Water Treatment · 2019
Varsha Dhar, Rajesh Singh
Archives of Microbiology · 2023
In this study, heat-pretreated sulfate-reducing bacteria (SRBs) were evaluated for simultaneous sulfate and nitrate removal in a bioelectrochemical system (BES). The effect of the applied potential of 20 mV to SRBs was evaluated at a sulfate concentration of 3 g/L and/or nitrate concentration of 0.5 g/L supplemented before heat pretreatment for sulfate and nitrate removal. The highest H 2 production of 2.24 ± 0.04 mM/L in heat-pretreated culture was observed in the presence of sulfate at an applied potential of 20 mV (BHE-S). Simultaneous reduction of sulfate and nitrate was significant in BESs supplemented with either sulfate or nitrate during heat-shock pretreatment of the culture. The highest SO 4 2- removal of 88.91 ± 0.8% was found in culture heat pretreated with NO 3 - and applied with 20 mV potential (BHE-N). The kinetics of heat-pretreated culture showed higher R 2 and ultimate potential for H 2 on the continuous application of 20 mV potential.
Xavier Alexis Walter, Irene Merino-Jiménez, John Greenman et al.
Journal of Power Sources · 2018
A novel design of microbial fuel cells (MFC) fuelled with undiluted urine was demonstrated to be an efficient power source for decentralised areas, but had only been tested under controlled laboratory conditions. Hence, a field-trial was carried out to assess its feasibility for practical implementation: a bespoke stack of 12 MFC modules was implemented as a self-sufficient lit urinal system at UK's largest music festival. Laboratory investigation showed that with a hydraulic retention time (HRT) of 44 h, a cascade of 4 modules (19.2 L displacement volume) was continuously producing ≈150 mW. At the same HRT, the chemical oxygen demand (COD) was reduced from 5586 mg COD·L -1 to 625 mg COD·L -1 . Field results of the system under uncontrolled usage indicate an optimal retention time for power production between 2h30 and ≈9 h. When measured (HRT of ≈11h40), the COD decreased by 48% and the total nitrogen content by 13%. Compared to the previous PEE POWER ® field-trial (2015), the present system achieved a 37% higher COD removal with half the HRT. The 2016 set-up produced ≈30% more energy in a third of the total volumetric footprint (max 600 mW). This performance corresponds to ≈7-fold technological improvement.
Indrasis Das, Sovik Das, M.M. Ghangrekar
Chemical Physics Letters · 2020
Pratiksha Srivastava, Rouzbeh Abbassi, Vikram Garaniya et al.
Journal of Water Process Engineering · 2020
Shijia Wu, Hui Li, Xuechen Zhou et al.
Water Research · 2016
A novel stacked microbial fuel cell (MFC) which had a total volume of 72 L with granular activated carbon (GAC) packed bed electrodes was constructed and verified to present remarkable power generation and COD removal performance due to its advantageous design of stack and electrode configuration. During the fed-batch operation period, a power density of 50.9 ± 1.7 W/m(3) and a COD removal efficiency of 97% were achieved within 48 h. Because of the differences among MFC modules in the stack, reversal current occurred in parallel circuit connection with high external resistances (>100 Ω). This reversal current consequently reduced the electrochemical performance of some MFC modules and led to a lower power density in parallel circuit connection than that in independent circuit connection. While increasing the influent COD concentrations from 200 to 800 mg/L at hydraulic retention time of 1.25 h in continuous operation mode, the power density of stacked MFC increased from 25.6 ± 2.5 to 42.1 ± 1.2 W/m(3) and the COD removal rates increased from 1.3 to 5.2 kg COD/(m(3) d). This study demonstrated that this novel MFC stack configuration coupling with GAC packed bed electrode could be a feasible strategy to effectively scale up MFC systems.
Heinz Hiegemann, Daniel Herzer, Edith Nettmann et al.
Bioresource Technology · 2016
A 45-L pilot MFC system, consisting of four single-chamber membraneless MFCs, was integrated into a full-scale wastewater treatment plant (WWTP) and operated under practical conditions with the effluent of the primary clarifier for nine months to identify an optimal operational strategy for stable power output and maximum substrate based energy recovery (Normalized Energy Recovery, NER). Best results with the MFC were obtained at a hydraulic retention time of 22h with COD, TSS and nitrogen removal of 24%, 40% and 28%, respectively. Mean NER of 0.36kWhel/kgCOD,deg and coulombic efficiency of 24.8% were reached. Experimental results were used to set up the first described energy balance for a whole WWTP with an integrated MFC system. Energetic calculations of the model WWTP showed that energy savings due to reduced excess sludge production and energy gain of the MFC are significantly higher than the loss of energy due to reduced biogas production.
Fabian Fischer, Marc Sugnaux, Cyrille Savy et al.
Applied Energy · 2018
Tahseen Hameed Khlaif
Process Biochemistry · 2024
Agnese Lai, Roberta Verdini, Mario Simone et al.
New Biotechnology · 2016
A sequential reductive-oxidative treatment was developed in this study in a continuous-flow bioelectrochemical reactor to address bioremediation of groundwater contaminated by trichloroethene (TCE) and less-chlorinated but still harmful intermediates, such as vinyl chloride. In order to optimize the anodic compartment, whereby the oxygen-driven microbial oxidation of TCE-daughter products occurs, abiotic batch experiments were performed with various anode materials poised at +1.20 V vs. SHE (i.e., graphite rods and titanium mesh anode coated with mixed metal oxides (MMO)) and setups (i.e., electrodes embedded within a bed of silica beads or graphite granule). The MMO anode displayed higher efficiency (>90%) for oxygen generation compared to the graphite electrodes. Additionally, the graphite bed presence adversely affects oxygen generation, likely due to the oxygen scavenging. This effect was completely eliminated by replacing the graphite granules with silica beads. The anodic setups were thereafter verified in a mentioned reactor at an applied TCE loading rate of approximately 20 μM d -1 and a hydraulic retention time of 1.4 d in each compartment. The cathode consisted of a bed of graphite granules and was potentiostatically controlled at -0.65 V vs. SHE. The best reactor performance in terms of removal efficiency (i.e., >97%), removal rate (i.e., 121.8 ± 2.7 μeq L -1 d -1 ), and the residual concentration (i.e., 5.03 ± 0.63 μeq L -1 ) of chlorinated contaminants was achieved with the MMO anode placed in a silica bed. Ecotoxicity tests performed with algae confirmed these results by showing progressive toxicity reduction from inlet to cathodic and anodic effluent using this reactor configuration.
Deepak Pant, Sunil A. Patil
Joule · 2022
Maallah R, Moutcine A, Chtaini A
Journal of Biosensors & Bioelectronics · 2016
Edogiawerie Lydia O, Lekeka Biniam Bekele, Tyohule Philp Aondongu et al.
International Journal of Scientific Development and Research · 2025
Shiwu Qian, Chenyu Wang, Changxiang Fang et al.
Nature Communications · 2025
Understanding the extracellular electron transfer (EET) process of electroactive bacteria is of great significance. It is critical yet challenging to differentiate the partial currents from direct (DET) and mediated electron transfer (MET) pathways in the integrated EET current. Herein the EET current of model exoelectrogen is successfully disentangled by using spatiotemporally-resolved oblique-incidence reflection difference (OIRD) technique coupled with polyaniline (PANI)-based dual electrode. The PANI film serves as an electron acceptor to translate the charge information into OIRD signals, enabling mapping of EET current. Upon complete reduction of PANI, the local EET current is switched off, and the soluble mediators are forced to discharge on the nearby PANI electrode, enabling measuring of MET current. In such a way, the DET and MET currents are measured and the average currents from each bacterium are quantified. As-reported method enables successful disentangling the EET current and may offer valuable insights to related research.
Abdullah, Katarzyna Krukiewicz
Electrochimica Acta · 2023
Ingrid Maldonado, Franz Zirena Vilca
Environmental Technology Reviews · 2025
Zohreh Moghiseh, Abbas Rezaee
Environmental Science and Pollution Research · 2021
Yi Li, Weizhong Li, Yazhi Yang et al.
SSRN Electronic Journal · 2021
Marc Sugnaux, Cyrille Savy, Christian Pierre Cachelin et al.
Bioresource Technology · 2017
Thomas Krieg, Franziska Enzmann, Dieter Sell et al.
Applied Energy · 2017
Behzad Shojaei, Iman Khazaee
International Journal of Thermal Sciences · 2021
Neeraj Kumar Singh, Rajesh Singh
Energy · 2022
Mareike Engel, Hendrik Bayer, Dirk Holtmann et al.
Bioelectrochemistry · 2019
A flavin-based extracellular electron transfer mechanism (EET) has recently been described for the gram-positive Listeria monocytogenes. The gram-positive, solvent producing Clostridium acetobutylicum is a known flavin producer. Since flavin secretion in C. acetobutylicum can be triggered by a low-iron environment, the interaction of iron with an electrochemical system as well as the consequences for flavin production are investigated. It is shown that iron adsorbs onto the electrode's surface in the form of iron phosphorus compounds but that this iron is still bioavailable. Moreover, a shift in the flavin spectrum of the supernatant from high flavin mononucleotide percentages of 59% to high riboflavin (43-45%) and flavin adenine dinucleotide (FAD, 40-48%) content can be seen by limiting or omitting the iron source from the culture medium. When additionally an electric potential of -600 mV vs. Ag/AgCl (saturated KCl) is applied, the same overall trend is obtained but an increase in flavin concentration and especially in the FAD share between 6 and 27% is observed. This study is a first hint that a flavin-based EET might also take place in solventogenic Clostridia and highlights the importance of further investigation of flavin production and their involvement in EET mechanisms in different species.
Jian Li, Graig Rosenberger, Zhen He
Chemical Engineering Journal · 2016
Mohan Qin, Ying Liu, Shuai Luo et al.
Chemical Engineering Journal · 2017
Heyang Yuan, Yaobin Lu, Ibrahim M Abu-Reesh et al.
Biotechnology for Biofuels · 2015
Jing Ren, Haoxin Li, Na Li et al.
RSC Advances · 2020
PNP absorbed in and surrounded by GPEs has kinetic favorability in the degradation process by a three-dimensional electrode MFC-Fenton system.
Qing Feng, Zhengkai An, Rusong Zhao et al.
Journal of the Korean Society of Marine Engineering · 2019
Muhammad Arif, Guanyu Zhu, Keqiang Wang et al.
SSRN Electronic Journal · 2022
Qing Feng, Young-Chae Song, Kyuseon Yoo et al.
Chemosphere · 2018
Vanoushe Rahemi, Stanislav Trashin, Vera Meynen et al.
Talanta · 2016
An adhesive conducting electrode material containing of graphite, biocompatible ion exchange polymer nafion(®) and commercial mesoporous TiO2 impregnated with horseradish peroxidase (HRP) is prepared and characterized by amperometric, UV-vis and N2 sorption methods. The factors influencing the performance of the resulting biosensor are studied in detail. The optimal electrode material consists of 45% graphite, 50% impregnated HRP-TiO2 and 5% nafion(®). The optimum conditions for H2O2 reduction are an applied potential of -0.3 V and 0.1 mM hydroquinone. Sensitivity and limit of detection in the optimum conditions are 1 A M(-1) cm(-2) and 1 µM correspondingly. The N2 sorption results show that the pore volume of TiO2 decreases sharply upon adsorption of HRP. The preparation process of the proposed enzyme electrode is straightforward and potentially can be used for preparation of carbon paste electrodes for bioelectrochemical detections.