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Sustainable energy from Deep Ocean Cold Seeps. Energy and Environmental Science. These devices use sea floor microbes to generate electricity and could one day be used to power oceanographic instruments. In this Web interview, Mark describes his research, particularly experiments he carried out at deep ocean seeps in Monterey Canyon, California.
Mark also described this work in a November article in Energy and Environmental Science. What are benthic microbial fuel cells and what are some of their potential uses? A benthic microbial fuel cell converts chemical energy into electrical current.
Microorganisms play two key roles in the system: The objective is to generate a steady supply of power that could be used to operate remote oceanographic instruments — things like water quality sensors or acoustic receivers that track the movements of tagged animals. These devices are usually powered by batteries.
My academic advisor, Clare Reimersand others developed early prototypes of benthic microbial fuel cells. My project has focused on improving the technology and scaling it up to provide useful amounts of power. Can you explain the fundamentals of how benthic microbial fuel cells work?
When particulate organic matter settles to the bottom of the ocean, it provides a carbon source for microbes living in sea floor sediments.
As they consume the organic matter, the microbes use up oxygen and create anoxic conditions in the sea floor sediment. Microbes mediate the transfer of electrons from the environment to the electrical circuit in two ways. Some microbes can metabolize organic carbon and transfer the electrons directly to a solid surface the electrode in this case.
Other microbes produce reduced metabolites, such as sulfide, that can react with the electrode to deliver electrons to the circuit. Schematic diagram of a benthic microbial fuel cell. In your paper in Energy and Environmental Science, you describe experiments you carried out at cold seeps — places where chemical-rich fluids emerge from sea floor sediments.
Why did you choose this setting? In earlier studies, we had found that we could increase the amount of power generated by our fuel cells if we constantly flushed water past the anode. We could create this flushing by pumping, but that sort of defeated the purpose of the fuel cell because then we had to expend power to run the pump.
So we decided to experiment with settings in the ocean where natural forces produced flow or advection, and cold seeps are one of those settings.Type: Dissertation. Abstract: Microbial fuel cell (MFCs) is an emerging renewable alternative technology with potential to be self-sustaining that could alleviate the energy crisis and reduce environmental pollution.
The use of the MFC as a dual system for electricity generation and wastewater treatment is been well reported in literature.
This is a microbial reverse electrodialysis fuel cell (MRC). When a high salt and low salt solutions are placed into alternating membrane pairs the reverse electrodialysis (RED) .
What are Microbial Fuel Cells What are Microbial Fuel Cells? A microbial fuel cell (MFC) is a bio-electrochemical device that harnesses the power of respiring microbes to convert organic substrates directly into electrical energy.
At its core, the MFC is a fuel cell, which transforms chemical energy into electricity using oxidation reduction reactions. microbial fuel cell in the laboratory and investigate the factors like dissolved oxygen, pH, temp and presence of plants affecting sediment microbial fuel cell performance.
Organic substances are converted into electricity through the action of bacteria as. Microbial Fuel Cell (MFC) is a bio-electrochemical system that produces electric current by using bacteria. MFC is essentially a device that converts chemical energy into electrical energy by using bacteria or microorganisms.
A. R. Zielke, “Application of Microbial Fuel Cell technology for a WaWater Treatment Alternative,” Jan Full transcript More presentations by Sara Azzam.