vegetable oil for running diesel engines

["A.D. Karve" <adkarve@pn2.vsnl.net.in>]

Dear Peter,
Everybody is talking about substituting diesel with vegetable oils but the
quantities available would not suffice to satisfy the demand. I confirm your
statement about the availability of tree oils in the tropics, but the ones
listed by you, e.g. coconut and oil palm, are grown on plantations, and
therefore costly.  There are atleast 50 oilseed bearing trees in India, that
grow wild. Their seed is available free of cost to anybody, who has the time
and patience to collect them in the forest. They produce non-edible oil,
which costs only half as much as the edible one, because the tree seeds are
available free of cost. The non-edible oils are used mainly for soap making.
For increasing the supply of these oils, these trees would have to be grown
on a plantation scale, and then they too would become as costly as the
edible oils because of the agronomic inputs that the farmer has to use. I
feel that producer gas or biogas would be better options than vegetable oil
for running diesel engines. Both of these fuels can be produced from
agricultural waste, which is readily available at a negligible cost.
Dr.A.D.Karve
President,
Appropriate Rural Technology Institute
Pune, India




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