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Application of magnetic microsorbents for separation, concentration and recovery of phosphate from wastewater streams

: Drenkova-Tuhtan, Asya; Meyer, Carsten; Schneider, Michael; Mandel, Karl; Gellermann, Carsten; Franzreb, Matthias; Steinmetz, Heidrun

Volltext ()

ResearchGate. Online resource (2016), 4 S.
Leading Edge Conference on Water and Wastewater Technologies <13, 2016, Jerez de la Frontera/Spain>
Konferenzbeitrag, Elektronische Publikation
Fraunhofer ISC ()
Adsorbenzien; Trennung; Aufkonzentrierung; Rückgewinnung; Phosphate; Abwasser; Abwasserreinigung

Advanced nanocomposite magnetic particles are developed and tested for the adsorptive elimination and recovery of phosphate directly from wastewater streams (PO4-P≈10mg/L). The phosphate loaded adsorbers can be extracted from the liquid phase via inexpensive low gradient magnetic separation, regenerated in a suitable solution where simultaneously phosphate desorption and concentration take place, and then reused again in multiple cycles. Laboratory experiments demonstrate the reusability of the particles in 60 consecutive adsorption/desorption cycles where under optimal reaction conditions >90% total efficiency and P-recovery can be achieved. The desorption solution can be enriched with phosphate ions through repetitive application of the same solution and used as a potential P-rich resource or alternatively serve as a source for further precipitation of a solid P-product (e.g. struvite). In addition, pilot-scale tests were performed to verify the feasibility to upscale the technology.