Apparatus for treating and purifying sewage, particularly sewage contaminated with detergents

Claim 1

Apparatus for treating sewage contaminated with detergents and purifying it for re-use as water comprising: A. a separator container for receiving sewage to be treated from a sewage producing installation and having means for separating from said sewage oil, grease, fat and solvents; B. a reaction container connected by conduit means with said separator container for receiving therefrom sewage being purified; C. means for adding to the sewage in said reaction container a flocculating agent for causing sedimentation oF the dirt and colloids in said sewage; D. means for removing from the reaction container sedimented dirt and colloidal matter; E. filter means for retaining particulate material connected by conduit means with said reaction container for receiving therefrom sewage being purified; F. an ozonizing container connected by conduit means with said filter means for receiving therefrom filtered sewage being purified; G. means connecting a source of ozone under pressure with said ozonizing container adjacent the lower portion thereof for introducing ozone into the sewage contained therein and decomposing said detergents; H. means for recirculating the sewage in said ozonizing container from the lower portion to the upper portion thereof for completing the decomposition of said detergents and thereby purifying the sewage and converting it to reusable water devoid of detergents, the upper end portion of said ozonizing container being under substantially atmospheric pressure and being provided with passage means for the escape therethrough to atmosphere of oxygen, ozone and gasses in the ozonizing container; and I. storage means connected by fluid conducting means with said ozonizing container for receiving therefrom purified water for re-use.