kg/t TS 90 80 70 60 50 40 30 20 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
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 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
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 15-55 50 2. Sludge sidestream (sludge liquor) 1-10 20-100 mg/l Dissolved 40-50 45 3. Dewatered/digested sidestream sludge 0.15 ~ 10,000 mg/kg ADS Biologically/ chemically bound ~ 90 45 4. Sludge ashes 0.03 ~ 64,000-100,000 mg/kg ADS Chemically bound ~ 90 ~ 90 RHP 2011-10 of 23 7 Hermann et al., (2009)
Selected P-recovery Techniques: Ostara Pearl (US-7622047 patent 2009) RHP 2011-14 of 23
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-7604740 patent 2009) RHP 2011-16 of 23
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 174.5 kg/d 447 kg/d (Schauer et al., 2010) RHP 2011-17 of 23
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 2011-18 of 23
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 2011-21 of 23 10 Scheidig (2011)