I was going top comment earlier on the mix ratio's, but..well...didn't. A 20% ratio is very high IMO. A "safer" ratio is recognised at only 5%. So there is a big jump with 20%.
Pat, are you finding problems with the high mix ratio fuels or the 5% that the engines come with?? I didn't understand that clearly. The 5% as a "safe" ratio is because of the issue with Caustic problems.
I have been looking into buy some gear
and trying to make it in my backyard. So I have done a small amount of research
into the stuff and how to make it. But several issues arose that have stopped me from doing it. One is supply of cooking oil
. It's already being brought up in quantities, I can only guess from people trying to produce BioD. So the supply is not as easy as everyone thinks. There are no great reserves of the stuff that food
shops are trying to get rid of.
The second was the by product. Glycerol is produced in huge quantities. That's basicaly the "large molicules" being seperated out leaving a more "pure" fuel oil
. It can't just be dumped and there is enormouse quantites already being advertised to get rid of. It is probably not of a quality able to be used in the food
industry, so I guess little can be done with it.
And lastly, the equipment
and chemicals are not that cheap
and IMO you don't save enough per ltr to warrant the time and mess to make the stuff. I am refering to backyard manufacture of course. I imagine, or would hope that commercial
production have many of those issues sorted. Otherwise there must be a lot of not very nice by product being dumped somewhere.
Now an interested turn has taken place here in NZ. A local company set up a small test plant down at our local effluent treatment ponds. They are growing an Algae and have then successfully produced biodeisel from it. So far it is still in trial stages, but they have made it work and it looks promising.