Power of the mud
Robotic artist Paul Granjon and bio-engineer Michka Melo are exploring the usability of microbial fuel cells for powering small robotic, sensing, interactive systems. Microbial fuel cells work by harnessing the electron-releasing capability of certain types of bacteria widely found in soil and mud. Paul and Michka have started working together on Microbial Fuel Cells, commonly known as Mud Batteries, in 2016.
Their batteries contain sediment mud from Barry Island, Wales. The mud is rich in bacteria of the Shewanella (below) or Geobacter type, that deliver bioelectrogenesis (generation of electricity by living organisms).
In September 2017 we showed our first working prototype in the Victoria and Albert Museum’s Digital Design Weekend in London, here is the link to fully detailed report on our experiments on microbial fuel cells before the event.
We had a great time, lots of questions and interest with amazed, amused, puzzled looks. Our bacteria worked hard and slow, 12 mud batteries powering 2 small robots for 10 seconds every 10 minutes. The robots run from a BBC Microbit each, with a small motor and an LED.
Thanks to Irini Papadimitriou for inviting us!
photo: Martine Goldschmidt-Clermont
With support from FabCre8 @ Cardiff School of Art and Design