Your wastewater treatment plant ought to compensate you nicely for taking charge of the grease trap waste. No doubt they would be happy to pawn their grease skimmings off on you as well.
FFAs.......Theoretical limit or physical limit? I don't believe Aleks lays a claim to any exact high point of FFAs which can be converted when following the procedure outlined in his ambient pressure method. At ambient pressure the primary limiting factors are reaction time and diluted catalyst. To establish a physical limit a series of tests would have to be conducted. Even then, the results would be dependant upon time limit. Some would have no problem with letting the reaction extend for a lengthy period. Others would be more inclined towards the McDonalds' drive thru method. Todd Swearingen ----- Original Message ----- From: movember <[EMAIL PROTECTED]> To: <biofuels-biz@yahoogroups.com> Sent: Tuesday, August 20, 2002 10:14 PM Subject: [biofuels-biz] Re: hi ffa feed stocks > The high-ffa feedstock is from industrial food waste and grease > traps. It doesn't smell very nice either! > > Out of interest, what is the upper limit of FFA that would be suited > to standard pressure, ~60 degrees C, Aleks-style two-stage processing? > > > > --- In [EMAIL PROTECTED], "Appal Energy" <[EMAIL PROTECTED]> wrote: > > Yes. HTP is required to obtain high esterification conversion on > > such material. I would suggest that you seek out your nearest > > college's chemistry department head and/or chemical engineering > > department to determine exactly what ballpark you will be in > > relative to pressure and temp. They may also be willing to > > assist you with the sampling > > > > 85% FFA feedstock is not derived from your run of the mill fish > > and chips outlet. It sounds more as if it's soap stock that has > > been removed during oil processing. > > > > Todd Swearingen > > > > ----- Original Message ----- > > From: movember <[EMAIL PROTECTED]> > > To: <[EMAIL PROTECTED]> > > Sent: Monday, August 19, 2002 9:03 PM > > Subject: [biofuels-biz] Re: hi ffa feed stocks > > > > > > > I am able to source large quantities of the high ffa feedstock > > (FFA > > > 85%), however initial miniature tests (1 litre batches using > > Aleks' > > > two stage Acid/Base method) have proved unsuccessful. > > > > > > Would the same process, under high Temperature/Pressure, be > > > sufficient to convert feedstocks of this type? If this may be > > the > > > case, then what mini-batch experiments could be done to test > > the > > > feedstock? > > > > > > Much apreciated. > > > > > > > > > --- In [EMAIL PROTECTED], "Appal Energy" <[EMAIL PROTECTED]> wrote: > > > > It's a bit difficult to say that acid/base catalysis "falls > > > > down," whether it be the ambient procedure as presented by > > Aleks > > > > Kac or a HTP industrial procedure. > > > > > > > > Most of what industry achieves under high pressure and > > > > temperature can be achieved at STP by conducting the reaction > > > > over prolonged periods, at moderate temperature and in > > several > > > > stages when necessary. > > > > > > > > To date we have experienced repeated success with STP > > > > esterification, simply by prolonging the esterification > > period to > > > > 36-48 hours, generating a complete transesterification > > reaction > > > > on 3.5% FFA feedstock with but 1.5 grams of KOH per liter of > > oil > > > > over a 36 hour period. > > > > > > > > Whether a repeat cycle is used on the esterification side or > > not, > > > > it is necessary to separate the feedstock from any layers > > that > > > > formed during the esterification prior to conducting the > > repeat > > > > cycle or the base stage. > > > > > > > > Todd Swearingen > > > > > > > > ----- Original Message ----- > > > > From: goat industries <[EMAIL PROTECTED]> > > > > To: <[EMAIL PROTECTED]> > > > > Sent: Monday, August 19, 2002 4:19 PM > > > > Subject: [biofuels-biz] hi ffa feed stocks > > > > > > > > > > > > > Check out work done by Canakci and Van Gerpen. I'm trying > > out > > > > their ideas, > > > > > but finding it difficult to get good results. Also, an acid > > > > value of 1mg > > > > > KOH/g = 0.5 % FFA. They identiified water formation in the > > acid > > > > stage as the > > > > > inhibiting part of the reaction, which is where Alek's > > > > 'foolproof' method > > > > > falls down (apparently). > > > > > > > > > > > > > > > ------------------------ Yahoo! Groups > > > > Sponsor ---------------------~--> > > > > > 4 DVDs Free +s&p Join Now > > > > > http://us.click.yahoo.com/pt6YBB/NXiEAA/Ey.GAA/9bTolB/TM > > > > > > > --------------------------------------------------------------- > > > > ------~-> > > > > > > > > > > Biofuels at Journey to Forever > > > > > http://journeytoforever.org/biofuel.html > > > > > Biofuel at WebConX > > > > > http://www.webconx.dns2go.com/2000/biofuel/biofuel.htm > > > > > List messages are archived at the Info-Archive at NNYTech: > > > > > http://archive.nnytech.net/ > > > > > To unsubscribe from this group, send an email to: > > > > > [EMAIL PROTECTED] > > > > > > > > > > > > > > > > > > > > Your use of Yahoo! Groups is subject to > > > > http://docs.yahoo.com/info/terms/ > > > > > > > > > > > > > > > > > > > > > > > > ------------------------ Yahoo! Groups > > Sponsor ---------------------~--> > > > 4 DVDs Free +s&p Join Now > > > http://us.click.yahoo.com/pt6YBB/NXiEAA/Ey.GAA/9bTolB/TM > > > --------------------------------------------------------------- > > ------~-> > > > > > > Biofuels at Journey to Forever > > > http://journeytoforever.org/biofuel.html > > > Biofuel at WebConX > > > http://www.webconx.dns2go.com/2000/biofuel/biofuel.htm > > > List messages are archived at the Info-Archive at NNYTech: > > > http://archive.nnytech.net/ > > > To unsubscribe from this group, send an email to: > > > [EMAIL PROTECTED] > > > > > > > > > > > > Your use of Yahoo! Groups is subject to > > http://docs.yahoo.com/info/terms/ > > > > > > > > > > > > ------------------------ Yahoo! Groups Sponsor ---------------------~--> > 4 DVDs Free +s&p Join Now > http://us.click.yahoo.com/pt6YBB/NXiEAA/Ey.GAA/9bTolB/TM > --------------------------------------------------------------- ------~-> > > Biofuels at Journey to Forever > http://journeytoforever.org/biofuel.html > Biofuel at WebConX > http://www.webconx.dns2go.com/2000/biofuel/biofuel.htm > List messages are archived at the Info-Archive at NNYTech: > http://archive.nnytech.net/ > To unsubscribe from this group, send an email to: > [EMAIL PROTECTED] > > > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ > > > ------------------------ Yahoo! Groups Sponsor ---------------------~--> 4 DVDs Free +s&p Join Now http://us.click.yahoo.com/pt6YBB/NXiEAA/Ey.GAA/9bTolB/TM ---------------------------------------------------------------------~-> Biofuels at Journey to Forever http://journeytoforever.org/biofuel.html Biofuel at WebConX http://www.webconx.dns2go.com/2000/biofuel/biofuel.htm List messages are archived at the Info-Archive at NNYTech: http://archive.nnytech.net/ To unsubscribe from this group, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
