“Don’t pick it up off the ground. It’s got germs in it.” These are the words that have come out of the mouths of countless moms and dads. However, microbial activity may begin to be used in exactly the opposite way.—purified waterResearchers at the University of Bath in the UK have explored the possibility of using microbial activity in the field to generate electricity to power water purification systems. Called soil microbial fuel cells (SMFCs), these easily manufactured devices generate renewable energy in a highly unconventional way.
The starting point is electricity generated by microorganisms in the soil. Organisms that produce this electrical current are known as electrogenic because they release electrons through their cell membranes as they carry out metabolic processes. A British scientific team has developed a system based on his two carbon electrodes, four centimeters apart. One of them he serves as the anode, the cathode is exposed to the atmosphere but buried. In this way electrons move from the anode to the cathode and are connected in an electrical circuit to generate electricity. It may be a weak current of only 0.4mW. Still, if several rows of electrodes are attached, the energy can be doubled to provide an output that can be used for various purposes. Finally, connect the electrode array to a battery to store this clean, renewable energy. Electrodes cost less than €4 per unit, but can be even cheaper in large-scale production.
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Pure water in the cutoff area
The northeastern part of Brazil is semi-arid and undeveloped. Access to drinking water and electricity is difficult, if not impossible, in many villages. So, in collaboration with geographers from Coela Federal University and a group of chemists from the Federal University of Rio Grande do Norte, the researchers realized that residents of Icapui, a fishing village in the region, could benefit from this breakthrough. rice field. Until now, residents have relied on chlorinated rainwater.Fortunately, this innovative technology project The situation can be improved by using an electrochemical reactor to perform the operation.
In an experiment with the help of local elementary school students, we were able to produce up to 3 liters of drinking water per day. The goal is to cover the daily needs of the whole family with a single, easy-to-install device. Electrochemical reactors have proven their efficiency under laboratory conditions, but this project shows that they can become an effective technology in everyday life. In fact, the first prototype he has been running continuously for 140 days.
Moreover drinking water production, one of the priorities of this initiative was to educate students at Ikapui schools on the values of sustainability and respect for the environment. Thanks to this work, the students learned about the scientific principles, installation and maintenance of the device.
sauce: science daily
