Bacteria could become a future source of electricity :
Meeting the increasingly important energy needs in a sustainable way is the challenge to researchers in our modern society. The latter explore for this purpose all the tracks imaginable. Among which, the use of bacteria to produce electricity.
Theof certain generates an . But until now, researchers were struggling to recover this current for outdoor use. Today, chemists from the (Sweden) propose a new method that seems more effective than those envisaged by their predecessors.
To extractfrom a , it is indeed necessary to rely on a capable of crossing its thick . And, to this end, Swedish researchers have created a new artificial molecule. A with redox properties containing quinone fractions – of which is a known example – mimicking natural bacterial charge carriers.
A communication mode to decrypt
“The electrons produced by the bacteria are captured and transferred to anin real time , “ says Lo Gordon, professor of . What to consider bacteria as a future . But also better understand how bacteria communicate with their environment. Probably through an extracellular electron transfer.
These results could be valuable in many contexts. Bacteria can, for example, also be used to producein the heart of . Bacteria capable of could, as long as they are attached to an electrode, produce electricity when exposed to .
Energy, directly from the bacteria to the battery
Producing electricity through bacteria is not new in itself. But Derek Lovley and his colleagues at the University of Massachusetts Amherst have achieved this experiment with a much higher return than what has been done so far and without any mediator.
And all thanks to Rhodoferax ferrireducens . This anaerobic
Some of these electrons serve to develop it, while the other part is sent back to rich supports . So the trick was for researchers to fix bacteria directly on electrodes, responsible for channeling the flow of excess electrons . This manipulation allowed them to obtain a return of 80% where current methods hardly exceed 50%.
However, since glucoseis a slow process, the process can not serve as a direct source of . However, there is nothing to prevent the charging of electric batteries , especially in the case of scientific equipment deployed at the bottom of the sea, where it is difficult to replace the batteries, or in the case of type medical devices that would be then able to extract energy from the blood glucose.