Water purifying robot to run forever!

…but what if it tips over boss?

Row-bot is a essentially a fuel cell powered by electricity that is generated solely by bacteria living inside the device. The beauty of this particular bacteria-powered fuel cell, however, is the means by which the tiny organisms living in its gut generate that electricity.

The Row-bot has four tiny buoyant stabilizers for feet and two paddles that extend from the middle of its body. While the feet keep Row-bot afloat, the paddles send it skimming across the surface of a body of water. The device takes water into a cavity in its housing as it moves, where electrogenic bacteria digest pollutants found within the water. The byproducts of that digestion are carbon dioxide and electricity, which in turn fuels the Row-bot and keeps it moving.

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