Abstract: An oxidation process for regeneration and closed loop recycling of cleaning solutions contaminated with used surfactants, fats, oils, greases, and inorganic and organic contaminants converts the contaminated cleaning solution into a reusable cleaning solution containing useful polar water soluble surfactants, detergents, wetting agents and emulsifiers. The contaminated cleaning solution is mixed with a stoichiometrically limited amount of an ozone containing gas. The reaction with ozone containing gas is carried out in a mixed vapor state (a gas/liquid mist). Fats, oils, greases and organic contaminants are converted into useful polar water soluble surfactants, detergents, wetting agents and emulsifiers. The regenerated cleaning solution has a cleaning strength at least as great as the strength of the original cleaning solution prior to contamination. The regenerated cleaning solution is reused as the cleaning solution in the original cleaning process from which the contaminated cleaner was obtained.

Abstract: An advanced oxidation process and apparatus for closed loop treating and recycling of cleaning solutions contaminated with used surfactants, fats, oils, greases, and inorganic and organic contaminates converts the contaminated cleaning solution into a reusable cleaning solution containing useful polar water soluble surfactants, detergents, wetting agents and emulsifiers. The contaminated cleaning solution is subjected to an ozone containing gas and alternating direct current. The reaction with ozone containing gas is carried out in a mixed vapor (gas/liquid mist) state. Fats, oils, greases and organic contaminates are converted into useful polar water soluble surfactants, detergents, wetting agents and emulsifiers and the excess organic surfactants, detergents, wetting agents, and emulsifiers are simultaneously converted into carbon dioxide, nitrogen, and water. The treated cleaning solution is reused as the cleaning solution in the original cleaning process from which the contaminated cleaner was obtained.