sulfuric acid in bio-diesel?

[SteveR]

When did people start mixing sulfuric acid into bio-diesel?

http://www.nj.com/news/index.ssf/2010/07/sulfuric_acid_explodes_in_newa.html

[greenformula92]

i think they have been....you just don't hear about it till this happens

[bandit88]

is this plant making bio diesel for the only bio diesel station in NJ?