Science Watch: Tiny power generator runs on spit

Science Watch: Tiny power generator runs on spit

Science Watch: Tiny power generator runs on spit is a science watch post about how a generator can run on body fluids like spit.

According to an article in the Penn State News, scientists have now found a way to power all kinds of microbial fuel cells with our own saliva. Microbial fuel cells create energy when bacteria break down organic material producing a charge that is transferred to the anode.

“By producing nearly 1 microwatt in power, this saliva-powered, micro-sized MFC (Microbial Fuel Cells) already generates enough power to be directly used as an energy harvester in microelectronic applications.”

The idea came from thinking about sensors for such things as glucose monitoring for diabetics. The scientists wondered if a mini microbial fuel cell could be used. From that one thought, this saliva powered generator was born.

While the researchers tested this mini microbial fuel cell using acetate and human saliva, it can use any liquid with sufficient organic material.

It is an interesting article which shows that we will soon be able to power all kinds of sensors with just a lick of spit. Looks like spit will be more useful than making spitballs in science class now.