When making Bio Diesel how do you dispose of or use the water used during the wash?

Question

When making Bio Diesel how do you dispose of or use the water used during the wash?

Answer 1

make a simple solar distiller and reuse it.

Answer 2

depends on the method of extraction, dewatering oil is usually done by evaporating the water off.  If you have contaminated water though it is important to dispose of it safely.  It would be best to phone your local centre of governance for details on your nearest dirty water disposal facility.