Nährsubstanz-Vergleich Wirtschaftsdünger / Bioabfallkompost / Klärschlamm

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5 kg/t TS Rindergülle Schweinegülle Bioabfallkompost Klärschlamm, nass Klärschlamm entwässert Klärschlamm entwässert, kalkstabilisiert 10 0 Ntotal P2O5 K2O Nährsubstanz-Vergleich Wirtschaftsdünger / Bioabfallkompost / Klärschlamm University of Stuttgart Institute for Sanitary Engineering, Water Quality and Solid Waste Management Dep. Hazardous Waste / Contaminated Sites Prof. Dr.-Ing. Erwin. Thomanetz

6 Rapf, Raupenstrauch, Thomanetz, Edlinger Phosphorrückgewinnung aus Klärschlamm 7 Orientierende Angaben zum Schwermetallrückhaltevermögen von Klärschlamm

7 Kon ze ntrati o n i n µg / L Zulauf Ablauf Konzentrationen organischer Spurenstoffe im Zulauf und Ablauf der Abwasserreinigungsanlage Köln (2005) University of Stuttgart Institute for Sanitary Engineering, Water Quality and Solid Waste Management Dep. Hazardous Waste / Contaminated Sites Prof. Dr.-Ing. Erwin. Thomanetz

14 P-Removal and Recovery Techniques: P-Recovery routes Phosphorus recovery techniques can be applied at 4 different stages in a WWTP 7 : Applying Stage Volume/Mass Flow L/ (C d) Concentration (as P) Phosphorus Status/form P of initial influent load (in %) Max. possible recovery (in % of the inlet fraction) 1. WWTP outflow 200 < 5 mg/l Dissolved Sludge sidestream (sludge liquor) mg/l Dissolved Dewatered/digested sidestream sludge 0.15 ~ 10,000 mg/kg ADS Biologically/ chemically bound ~ Sludge ashes 0.03 ~ 64, ,000 mg/kg ADS Chemically bound ~ 90 ~ 90 RHP of 23 7 Hermann et al., (2009)

20 Selected P-recovery Techniques: Ostara Pearl (US patent 2009) RHP of 23

21 Selected P-recovery Techniques: Ostara Pearl Clean Water Service s (CWS) Durham Advanced WWTP in Portland, Oregon: first full-scale nutrient recovery plant in the US in May, 2009 (patented) (US patent 2009) RHP of 23

22 Selected P-recovery Techniques: Ostara Pearl Study of an engineering consulting company (Black & Veatch, USA) at CWS WWTP Phosphorus mass balance: 635 kg/d Influent Return liquid Effluent 13.5 kg/d 28% P-rec. 91 kg/d Struvite Sludge kg/d 447 kg/d (Schauer et al., 2010) RHP of 23

25 Selected P-recovery Techniques: Ingitec Mephrec Developed by the German engineering company Ingitec at the Technische Universität Freiberg, in Saxony, Germany Special metallurgical technique: hence Metallurgical phosphorus recycling (Mephrec) Removes HMs from dewatered sludge, with potential energy and P-rich slag recovery in one process step Full-scale industrial plant with Mephrec technology, does not yet exist (Ingitec 2010) RHP of 23

26 Selected P-recovery Techniques: Ingitec Mephrec Feasibility and economical study made by Ingitec for Nuremberg s WWTP Potential treatment of ca. 60,000 to 70,000 t sludge/y (27% DM) 10 Syn-gas for electric power production Waste heat for sludge drying (85 %DM) (Sheidig et al., 2009) RHP of Scheidig (2011)

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Rapf, Raupenstrauch, Thomanetz, Edlinger Phosphorrückgewinnung aus Klärschlamm 7 Orientierende Angaben zum Schwermetallrückhaltevermögen von Klärschlamm Kon ze ntrati o n i n µg / L Zulauf Ablauf Konzentrationen