It appears that I am not the first building a fuel cell demonstration kit. An internet store offers a variety of fuel cells for educational and recreational purposes, like this cute desktop car (priced less than 100 US$). Their fuel cells are based on hydrogen and methane, not on wastewater as mine, but that is not for lack of technical capability but, I presume, because no one will put a wastewater fueled clever mechanism on his office desk. Not being the first is NOT the end of a startup. Maybe it is even an advantage, having seen the concept's feasibility demonstrated. But I have to spend more effort in rethinking the concept.
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