Recycling Vegetable Oil Waste

I am working on a recycling projet using vege oil so, i need the best way to dispose of the shortning and glycerin left over after my proces. It consist of fine particule, fries, carbon résidu, sout and solid grease.

Until now, the best one is the practice describe on http://journeytoforever.org/biodiesel_glycerin.html#sawdust

It work well and it is usefull but , i am curius to find better.

My second choice goes to http://journeytoforever.org/biofuel_library/ethanol_motherearth/me4.html

but it dont look safe enough for my aplication .

Michel