Some comments:
That is a very interesting site. I respect and admire the simple and thorough solutions to the engineering problems you faced. The solutions and the application seems to use sound and ingeneous methods.
However, I take issue with some of the rah-rah propeganda about ethanol. It is not the environmental or economic panacea as you site suggests.
The farming industry in the US is heavily subsidized. The true costs of producing ethanol are somewhat hidden due to the subsidies involved. It actually takes more BTU's of energy to plant, harvest and distill the corn required to produce ethanol than the ethanol fuel contains.
Therefore, E85 does not save us from using petroleum fuel It is not environmentally friendly at all, since most agricultural equipment uses diesel equipment with little or no emission controls. (Also, gasoline powered agricultural equipment that can be converted to alcohol is rare these days. ) It is much more environmentally friendly to tip the pertoleum products into a modern emission-controlled car.
Right now, it is more efficient to use the petroleum products directly in your car than in the farm machinery used to produce the corn and subsequent alcohol. This sayves the duplicate infrastructure required to produce and distribute an incompatible fuel like E85.
Yes, of course waste vegetable matter can be used to produce alcohol, which would reduce this problem. Such vegetable matter can also be used to produce bio-diesel and other pertoleum-like products. In fact ANY waste organic material, including many animal and vegetable products can be reformed into bio-diesel and other fuels.
However, the bulk of ethanol right now comes from corn and not from waste vegetable matter, which is an inefficient use of petroleum fuels.
Also, safety: Alcohol burns with very little and often, no visible flame. If your car catches fire, you may not know until you recieve dangerous or possibly fatal burns.