System and method for advanced oxidation of treated sewage effluent
A system and method for advanced oxidation ( 10 ) of treated sewage effluent provide additional treatment to treated sewage effluent (TSE) for reuse thereof. The method includes exposing TSE to ozone and hydrogen peroxide to oxidize contaminants; coagulating remaining waste in the TSE; flocculating the coagulated TSE; holding the flocculated treated sewage effluent in a settling tank for sedimentation; removing coarse suspended particles from the flocculated TSE by filtration after sedimentation; and removing fine suspended particles by ultrafiltration of the TSE after removing the coarse suspended particles. The system includes a chemical mixing tank ( 16 ); a homogenizing tank ( 22 ); an advanced oxidation process system ( 24 ); a rapid mixer; a flocculation tank ( 28 ); a sedimentation tank ( 32 ); a sand filter ( 34 ); and at least one ultrafiltration system ( 38 ), ( 36 ).
1. A method for post-treatment of treated sewage effluent, consisting of the steps of:
exposing treated sewage effluent to ozone and hydrogen peroxide to oxidize contaminants therein to provide a first decontaminated treated sewage effluent;
removing suspended particles from the first decontaminated treated sewage effluent, wherein the removal of particles consists of the steps of:
coagulating remaining waste in the treated sewage effluent,
flocculating the coagulated treated sewage effluent,
holding the flocculated treated sewage effluent in a settling tank for sedimentation to occur, wherein the sedimentation occurs for at least 30 minutes,
removing coarse suspended particles from the flocculated treated sewage effluent by a first filtration after sedimentation to provide a first filtered sewage effluent; and
removing fine suspended particles from the first filtered treated sewage effluent by a ceramic or polymer ultrafiltration to provide a second filtered treated sewage effluent.
2. A system for post-treatment of treated sewage effluent, the system consists of:
(a) a preparation tank for receiving treated sewage effluent;
(b) an ozone injection system for adding ozone to an ozone contactor;
(c) a hydrogen peroxide dosing pump for adding hydrogen peroxide to the ozone contactor;
(d) a rapid mixer for coagulating the ozone-hydrogen peroxide treated sewage effluent;
(e) a flocculation tank for flocculating coagulated treated sewage effluent;
(f) a sedimentation tank for settling suspended particles from the flocculated treated sewage effluent;
(g) a sand filter for filtering the settled suspended particles;
(h) a ceramic or polymer ultrafiltration system for ultrafiltration of the filtered treated sewage effluent;
(i) an advanced oxidation process system for administration of a second treatment of ozone and hydrogen peroxide;
a system of conduits connecting (a) through (i).