A method and biological cleaning system are provided for cleaning substrate surfaces
of oils and/or greases using a biological cleaning system which utilizes a pre-treatment
bath and/or post-treatment bath as part of the cleaning system. The pre-treatment
and/or post-treatment baths are compatible with the biological cleaning bath and
during operation of the system, the used pre-treatment and/or post-treatment baths
are recycled to the biological cleaning solution for biodegradation. A system is
provided in which none of the pre-treatment, post-treatment or biological cleaning
baths need expensive waste disposal. Replenishment pre-treatment and/or post-treatment
baths as well as biological cleaning baths are added as needed to the biological
cleaning system. Other treatment baths may be added directly to the biological
cleaning bath with or without pre- or post-treatment for specific purposes such
as a detergent phosphating bath used in the biological cleaning tank to provide
a cleaned phosphated part.
