Abstract: This sewage and waste water treatment introduces a different approach to the usual biological digestion of organic solids and sterilization thereof in the effluent. It proceeds from the concept that all sediments and suspended solids to 20 microns or less are removed immediately and continuously from the in-flow, and the almost suspended solid-free flow therefrom is treated in a unique manner with ozone so as to react chemically with the dissolved and remaining suspended solids by oxidation to produce precipitations, gasifications and sterilization which in turn are removed immediately and continuously to 5 microns or less, thus greatly reducing the ozone requirements for the oxidation reactions. The liquid effluent discharged from this process is a clear and sterilized liquid having no contaminants harmful to biological life.