scholarly journals Comparative Metagenomic Analysis of Electrogenic Microbial Communities in Differentially Inoculated Swine Wastewater-Fed Microbial Fuel Cells

Scientifica ◽  
2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Irina V. Khilyas ◽  
Anatoly A. Sorokin ◽  
Larisa Kiseleva ◽  
David J. W. Simpson ◽  
V. Fedorovich ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Microbial Fuel Cells ◽  
New Technologies ◽  
Microbial Community Composition ◽  
Methanosarcina Barkeri ◽  
Electricity Production ◽  
Swine Wastewater ◽  
Methanothermobacter Thermautotrophicus ◽  
Inoculum Type

Bioelectrochemical systems such as microbial fuel cells (MFCs) are promising new technologies for efficient removal of organic compounds from industrial wastewaters, including that generated from swine farming. We inoculated two pairs of laboratory-scale MFCs with sludge granules from a beer wastewater-treating anaerobic digester (IGBS) or from sludge taken from the bottom of a tank receiving swine wastewater (SS). The SS-inoculated MFC outperformed the IGBS-inoculated MFC with regard to COD and VFA removal and electricity production. Using a metagenomic approach, we describe the microbial diversity of the MFC planktonic and anodic communities derived from the different inocula. Proteobacteria (mostly Deltaproteobacteria) became the predominant phylum in both MFC anodic communities with amplification of the electrogenic genusGeobacterbeing the most pronounced. Eight dominant and three minor species ofGeobacterwere found in both MFC anodic communities. The anodic communities of the SS-inoculated MFCs had a higher proportion ofClostridiumandBacteroidesrelative to those of the IGBS-inoculated MFCs, which were enriched withPelobacter. The archaeal populations of the SS- and IGBS-inoculated MFCs were dominated byMethanosarcina barkeriandMethanothermobacter thermautotrophicus, respectively. Our results show a long-term influence of inoculum type on the performance and microbial community composition of swine wastewater-treating MFCs.

scholarly journals Preparation and Analysis of Ni–Co Catalyst Use for Electricity Production and COD Reduction in Microbial Fuel Cells

Catalysts ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1042 ◽  
Author(s):  
Paweł P. Włodarczyk ◽  
Barbara Włodarczyk
Keyword(s):  
Fuel Cells ◽  
Microbial Fuel Cells ◽  
New Technologies ◽  
Renewable Energy Sources ◽  
Oxygen Demand ◽  
Electricity Production ◽  
Waste Products ◽  
Cod Reduction ◽  
Reduction Time ◽  
Pre Treatment

Microbial fuel cells (MFCs) are devices than can contribute to the development of new technologies using renewable energy sources or waste products for energy production. Moreover, MFCs can realize wastewater pre-treatment, e.g., reduction of the chemical oxygen demand (COD). This research covered preparation and analysis of a catalyst and measurements of changes in the concentration of COD in the MFC with a Ni–Co cathode. Analysis of the catalyst included measurements of the electroless potential of Ni–Co electrodes oxidized for 1–10 h, and the influence of anodic charge on the catalytic activity of the Ni–Co alloy (for four alloys: 15, 25, 50, and 75% concentration of Co). For the Ni–Co alloy containing 15% of Co oxidized for 8 h, after the third anodic charge the best catalytic parameters was obtained. During the MFC operation, it was noted that the COD reduction time (to 90% efficiency) was similar to the reduction time during wastewater aeration. However, the characteristic of the aeration curve was preferred to the curve obtained during the MFC operation. The electricity measurements during the MFC operation showed that power equal to 7.19 mW was obtained (at a current density of 0.47 mA·cm−2).

Microbial fuel cells: Devices for real wastewater treatment, rather than electricity production

2021 ◽  
Vol 775 ◽  
pp. 145904
Author(s):  
Jaecheul Yu ◽  
Younghyun Park ◽  
Evy Widyaningsih ◽  
Sunah Kim ◽  
Younggy Kim ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Fuel Cells ◽  
Microbial Fuel Cells ◽  
Electricity Production ◽  
Real Wastewater

Biochar as a sustainable electrode material for electricity production in microbial fuel cells

2014 ◽  
Vol 157 ◽  
pp. 114-119 ◽  
Author(s):  
Tyler Huggins ◽  
Heming Wang ◽  
Joshua Kearns ◽  
Peter Jenkins ◽  
Zhiyong Jason Ren
Keyword(s):  
Fuel Cells ◽  
Electrode Material ◽  
Microbial Fuel Cells ◽  
Electricity Production

scholarly journals Packed anode derived from cocklebur fruit for improving long-term performance of microbial fuel cells

2018 ◽  
Vol 62 (5) ◽  
pp. 645-652 ◽  
Author(s):  
Cuicui Yang ◽  
Mengjie Chen ◽  
Yijun Qian ◽  
Lu Zhang ◽  
Min Lu ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Microbial Fuel Cells ◽  
Long Term Performance ◽  
Term Performance

Long term testing of Microbial Fuel Cells: Comparison of different anode materials

2016 ◽  
Vol 219 ◽  
pp. 37-44 ◽  
Author(s):  
D. Hidalgo ◽  
T. Tommasi ◽  
K. Velayutham ◽  
B. Ruggeri
Keyword(s):  
Fuel Cells ◽  
Microbial Fuel Cells ◽  
Anode Materials

scholarly journals Electricity production and sludge reduction by integrating microbial fuel cells in anoxic-oxic process

2017 ◽  
Vol 69 ◽  
pp. 346-352 ◽  
Author(s):  
Benyi Xiao ◽  
Meng Luo ◽  
Xiao Wang ◽  
Zuoxing Li ◽  
Hong Chen ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Microbial Fuel Cells ◽  
Electricity Production ◽  
Sludge Reduction

The effect of clogging on the long-term stability of different carbon fiber brushes in microbial fuel cells for brewery wastewater treatment

2020 ◽  
Vol 11 ◽  
pp. 100420 ◽  
Author(s):  
Sarah Brunschweiger ◽  
Emile Tabu Ojong ◽  
Jana Weisser ◽  
Christian Schwaferts ◽  
Martin Elsner ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Fuel Cells ◽  
Carbon Fiber ◽  
Microbial Fuel Cells ◽  
Brewery Wastewater ◽  
Term Stability ◽  
Long Term Stability

scholarly journals Scaling up Microbial Fuel Cells for Treating Swine Wastewater

Water ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1803 ◽  
Author(s):  
Yuko Goto ◽  
Naoko Yoshida
Keyword(s):  
Organic Matter ◽  
Fuel Cells ◽  
Microbial Fuel Cells ◽  
Removal Rate ◽  
Oxygen Demand ◽  
Cod Removal ◽  
Swine Wastewater ◽  
Flow Mode ◽  
Carbon Cloth ◽  
Simultaneous Generation

Conventional aerobic treatment of swine wastewater, which generally contains 4500–8200 mg L−1 of organic matter, is energy-consuming. The aim of this study was to assess the application of scaled-up microbial fuel cells (MFCs) with different capacities (i.e., 1.5 L, 12 L, and 100 L) for removing organic matter from swine wastewater. The MFCs were single-chambered, consisting of an anode of microbially reduced graphene oxide (rGO) and an air-cathode of platinum-coated carbon cloth. The MFCs were polarized via an external resistance of 3–10 Ω for 40 days for the 1.5 L-MFC and 120 days for the 12L- and 100 L-MFC. The MFCs were operated in continuous flow mode (hydraulic retention time: 3–5 days). The 100 L-MFC achieved an average chemical oxygen demand (COD) removal efficiency of 52%, which corresponded to a COD removal rate of 530 mg L−1 d−1. Moreover, the 100 L-MFC showed an average and maximum electricity generation of 0.6 and 2.2 Wh m−3, respectively. Our findings suggest that MFCs can effectively be used for swine wastewater treatment coupled with the simultaneous generation of electricity.

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