if the bio is clear fresh (hot) out of the reactor
and then it clouds up
whatever fats the cloudyness is made from must be floating around in the bio, and then group up and join together to form tiny fat lumps which we see at cloudyness
maybe it's easier (less energy) to form fats on the surface of the newspaper than it is for then to stick to each other ?
and/or it's easier to bump into and stick to the massive surface area of the newspaper than another tiny fat molecule ?
you could test a thin slither of newspaper and see what happens, does it totally clear the bio, and is there a residue left on it ?
could also try cardboard, a plastic bag, a bit of wood, broken glass, some kind of cloth/wool/denim etc... if you've got a dog, comb it then stick some of it's hair in there ?
(just trying to cover all biases with materials/surfaces)
if you can narrow down exactly what's going on, it would be much easier to adapt it into your process / make it more efficient
if it is the rough surface helping the fats form like I'm guessing, then newspaper probably will be one of the best things for it because it has a rough surface...
if that's right, then it would be pretty easy to roll up some newspapers into some drain pipe and pump the (cold) bio through... not sure how fast you could pump it... I can't decide if using lots of newspaper tightly packed in will mean you can pump it through pretty fast or not... still thinking on that one
