This presentation describes how the Aquacritox process can be used to generate renewable energy from wastewater sludge and enable phosphorus recovery. The Aquacritox supercritical water oxidation proces leads to complete sludge destruction. The presentation was presented at the European Biosolids Conference

3. Estimates of Timeline for Peak in Phosphorus Production

6. Value of Phosphorous in sludge

10. sludge is reduced to inert solid residue

11. Aqua Critox ® SEPARATOR BOILER WATER FEED PUMP STEAM SLUDGE FEED COOLER PRESSURE REDUCTION REACTOR HIGH PRESSURE PUMP HEATER ECONOMISER OXYGEN CO 2 ,N 2 ,0 2 Treated sludge STEAM GENERATOR GRINDER PUMP THICKENER CLEAN WATER RECYCLING PROCESS INERT RESIDUE Coagulant Phosphate

13. Scenario A: P Mass Balance – Bio-P with AD (500K PE ) 1,125 kg/d DAFT Bio P Removal Secondary Clarifiers Filters Primary Clarifiers UV Digesters Centrifuge 112 kg/d Treated Wastewater 1,013 kg/d 750 kg/d 638 kg/d Waste Sludge 375 kg/d – Return P Load

14. Scenario B: Mass balance – Bio P with Aqua Critox® (500K PE) 530kg/d Recovered P from the recovery step. DAFT Bio P Removal Secondary Clarifiers Filters Primary Clarifiers UV Aquacritox Ash 805 kg/d 115 kg/d Treated Wastewater 690 kg/d 750 kg/d 585 kg/d 55 kg/d – Return P Load Supernatant 105 kg/d