Bacterial growth and respiration in laminar flow microbial fuel cells

2014 ◽  
Vol 6 (2) ◽  
pp. 023125 ◽  
Author(s):  
Arwa Fraiwan ◽  
Douglas F. Call ◽  
Seokheun Choi
Keyword(s):  
Fuel Cells ◽  
Laminar Flow ◽  
Bacterial Growth ◽  
Microbial Fuel Cells

scholarly journals Dynamic Flow Characteristics and Design Principles of Laminar Flow Microbial Fuel Cells

Micromachines ◽  
2018 ◽  
Vol 9 (10) ◽  
pp. 479 ◽  
Author(s):  
Way Cheng ◽  
Celal Erbay ◽  
Reza Sadr ◽  
Arum Han
Keyword(s):  
Fuel Cells ◽  
Laminar Flow ◽  
Microbial Fuel Cells ◽  
Rectangular Cross Section ◽  
Fluid Velocity ◽  
Flow Characteristics ◽  
Surface Characteristics ◽  
Substantial Effect ◽  
Design Guidelines ◽  
Bacterial Attachment

Laminar flow microbial fuel cells (MFCs) are used to understand the role of microorganisms, and their interactions with electrodes in microbial bioelectrochemical systems. In this study, we reported the flow characteristics of laminar flow in a typical MFC configuration in a non-dimensional form, which can serve as a guideline in the design of such microfluidic systems. Computational fluid dynamics simulations were performed to examine the effects of channel geometries, surface characteristics, and fluid velocity on the mixing dynamics in microchannels with a rectangular cross-section. The results showed that decreasing the fluid velocity enhances mixing but changing the angle between the inlet channels, only had strong effects when the angle was larger than 135°. Furthermore, different mixing behaviors were observed depending on the angle of the channels, when the microchannel aspect ratio was reduced. Asymmetric growth of microbial biofilm on the anode side skewed the mixing zone and wall roughness due to the bacterial attachment, which accelerated the mixing process and reduced the efficiency of the laminar flow MFC. Finally, the magnitude of mass diffusivity had a substantial effect on mixing behavior. The results shown here provided both design guidelines, as well as better understandings of the MFCs due to microbial growth.

scholarly journals Enhanced Power Extraction with Sediment Microbial Fuel Cells by Anode Alternation

Fuels ◽  
2021 ◽  
Vol 2 (2) ◽  
pp. 168-178
Author(s):  
Marzia Quaglio ◽  
Daniyal Ahmed ◽  
Giulia Massaglia ◽  
Adriano Sacco ◽  
Valentina Margaria ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Energy Harvesting ◽  
Power Density ◽  
Microbial Fuel Cells ◽  
Average Power ◽  
Power Extraction ◽  
Harvesting Technique ◽  
Harvesting Method ◽  
Energy Harvesting Devices ◽  
Efficient Power

Sediment microbial fuel cells (SMFCs) are energy harvesting devices where the anode is buried inside marine sediment, while the cathode stays in an aerobic environment on the surface of the water. To apply this SCMFC as a power source, it is crucial to have an efficient power management system, leading to development of an effective energy harvesting technique suitable for such biological devices. In this work, we demonstrate an effective method to improve power extraction with SMFCs based on anodes alternation. We have altered the setup of a traditional SMFC to include two anodes working with the same cathode. This setup is compared with a traditional setup (control) and a setup that undergoes intermittent energy harvesting, establishing the improvement of energy collection using the anodes alternation technique. Control SMFC produced an average power density of 6.3 mW/m2 and SMFC operating intermittently produced 8.1 mW/m2. On the other hand, SMFC operating using the anodes alternation technique produced an average power density of 23.5 mW/m2. These results indicate the utility of the proposed anodes alternation method over both the control and intermittent energy harvesting techniques. The Anode Alternation can also be viewed as an advancement of the intermittent energy harvesting method.

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
Sign in / Sign up

Export Citation Format

Share Document