If this titrated very high after the glyc wash then the presence of the FFA would cause the formation of soap and water.
Each 1g of NaOH would give about 0.5g of water, so if it was an 80L batch titrating at 8 you would get 320g of water.
Each 1g of NaOH would also produce about 8g of soap, so it 80L batch at 8 would give you about 5 Kg of soap !!!
This is why the glyc wash and in the case where there is insufficient glyc to neutralise all the FFA, Dave's enhanced glyc wash (with added caustic) is so beneficial as it neutralises the FFA, and absorbs the water and soap into the glyc. You are then just reacting the good oil with the base amount of caustic and not worrying about the excess soap/water created causing severe problems.
The glyc you have will probably be hold a significant amount of bio, you could try a few experiments to see if anything can free that bio.
I suggest:
1) 1L glyc and add say 250ml water
2) 1L glyc and add say 100l glyc
2) 1L glyc and add say 50ml methanol
3) 1L glyc and add say 50ml good clean veg oil
See if any of those cause any bio (or bio/oil) to be released, I've suggested quanties to add to the glyc, but these are pure guesses, you might want to try doubling or even quadrupling the quantities so see if anything works.
Heating the glyc up to distill off all the methanol and water might also work to release some bio but is obviously somewhat more hazardous and it might not work!
Dave or someone else might have some other suggestions.
PS
I've assumed your none too keen on messing with sulpuric acid.
