Frustrated by the amount of dog waste appearing on the sidewalks of his neighborhood, inventor Brian Harper developed a way to power UK street lights using dog feces as a fuel source.
Harper's system relies on 10 bags of dog feces to power a street light for two whole hours at a time. Dog walkers simply dispose of their pets' waste into a nearby container and turn the handle, thus transforming the waste into methane through a process of anaerobic digestion.
“The gas light captured people’s imagination and shows them dog poop has a value,” says Harper. “As a result, we get it [poo] off the ground, into a receptacle, and producing something useful.”
Harper isn’t the first person to see the value in dog waste. The Park Spark project in Massachusetts (U.S.) also relies on disposed dog waste to power park lamps.
To see how the Park Spark project works, watch the accompanying video.