This is probably one of those really basic things that's only just dawned on me but which is common knowledge to everyone else to the extent they they don't bother commenting on it ... but here goes.
From time to time I'll get bio that, once washed, takes ages to clear. Having acid and pump washed, most of the time it comes out of the processor virtually clear, but I've never understood why, on occasions, it remains cloudy despite heating to 90°C ish and distilling through PD.
I was in a rush on the last batch and only did a single stage and accepted a conversion rate of circa 90% (not an issue as the fuel was destined for the Disco). This batch is now taking ages to clear despite bubbling from 70°C down to ambient over night in the settling tank (and no, the ambient humidity wasn't high at the time of bubbling).
Cloud it be that the oil has a far greater propensity to hold on to moisture that the bio hence the cloudiness? My guess would be that it has. Anyone else noticed this with poor conversions?
