Turning animal waste into fuel
The trike’s unusual power source depended on a process that happens out of sight. In an oxygen-free tank, microbes break down animal waste and release biogas, a mixture that includes methane. The gas can be collected and used as fuel; burning its methane in an engine releases energy that turns the wheels.
That chain requires more than putting waste in a tank. The material has to decompose in a controlled system, and the resulting gas has to be gathered and delivered to the engine. So the rider was not producing fuel during a trip: the trike ran on gas made beforehand by a separate processing setup.
A toilet seat as part of the design
The porcelain seat made the vehicle’s waste-to-fuel idea visible at a glance. It was a saddle in the literal sense, not the source of the fuel. That distinction is the point of the contraption: the seat supplied the visual joke, while the processing system supplied the energy.
The setup also illustrates a practical transport tradeoff. Biogas can put waste to use as fuel, but only where there is equipment to produce and handle it. The trike could carry its odd seat anywhere; its fuel depended on infrastructure beyond the vehicle.
