Keith,
You wrote:-
> Some studies have found that, others not. Some users have found that
> too, others not. It also depends on the oil being used, some
> polymerize much more easily than others. (Biodiesel made from those
> oils will also polymerise, but not as quickly.) It's something of an
> SVO myth that SVO can be produced from decentralized small oil
> expellers - ie straight from the plant. SVO must be refined first,
> including degumming. See "Straighter-than-straight vegetable oils as
> diesel fuels":
> http://journeytoforever.org/biodiesel_SVO-Allen.html
>
I have recently read a paper
PURIFICATION OF COLD PRESSED RAPESEED OIL TO USE AS A FUEL
FOR ADAPTED DIESEL ENGINES
E. Remmele 1 , B. Widmann 2
12th European Conference on Biomass for Energy, Industry and Climate
Protection, 17-21 June 2002, Amsterdam, The Netherlands
That details the processes used by the 180 or so small scale German oil
mills for production of rapeseed oil fuel. The paper suggests that they
cold press and then either use a filter or a sedimentation process
followed by a safety filter and then the fuel is ready, complying with
the Weihenstephan standard.
I guess that the level of production and usage of fuel from these mills
would point to degumming being unnecessary with rapeseed oil?
Darren
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