Pilot-scale removal and recovery of dissolved phosphate from secondary wastewater effluents with reusable ZnFeZr adsorbent @ Fe3O4/SiO2 particles with magnetic harvesting

Drenkova-Tuhtan A, Schneider M, Franzreb M, Meyer C, Gellermann C, Sextl G, Mandel K, Steinmetz H (2017)

Publication Type: Journal article

Publication year: 2017

Journal

Water Research Elsevier / IWA Publishing

Book Volume: 109

Pages Range: 77-87

DOI: 10.1016/j.watres.2016.11.039

Abstract

Advanced nanocomposite magnetic particles functionalized with ZnFeZr-adsorbent are developed, characterized and tested for the removal and recovery of phosphate directly from spiked secondary wastewater effluent (∼10 mg/L PO4–P). The phosphate loaded particles can be extracted from the liquid phase via magnetic separation, regenerated in a NaOH solution where phosphate desorption takes place, and reused in numerous cycles. Laboratory experiments demonstrate their reusability and stability in 60 consecutive adsorption/desorption runs where under optimal conditions > 90% total P-recovery efficiency is reached. In addition, pilot tests are performed to verify the proof-of-concept by upscaling the technology and maintain high efficiency of phosphate removal and recovery after treating 1.5 m3 wastewater in 20 cycles. Effluent concentrations <0.05 mg/L PO4–P can be achieved in the treated wastewater. The reclaimed desorption solution is concentrated with phosphate ions through its repetitive application, attaining up to 38-times enrichment (∼380 mg/L PO4–P) compared to the initial concentration in wastewater. The P-rich eluate is used as a source for subsequent precipitation of a solid fertilizer product such as struvite.

Authors with CRIS profile

Karl Mandel

Involved external institutions

Fraunhofer Institut für Silicatforschung (ISC) DE Germany (DE) Technische Universität Kaiserslautern DE Germany (DE) Universität Stuttgart DE Germany (DE) Karlsruhe Institute of Technology (KIT) DE Germany (DE)

How to cite

APA:

Drenkova-Tuhtan, A., Schneider, M., Franzreb, M., Meyer, C., Gellermann, C., Sextl, G.,... Steinmetz, H. (2017). Pilot-scale removal and recovery of dissolved phosphate from secondary wastewater effluents with reusable ZnFeZr adsorbent @ Fe3O4/SiO2 particles with magnetic harvesting. Water Research, 109, 77-87. https://doi.org/10.1016/j.watres.2016.11.039

MLA:

Drenkova-Tuhtan, Asya, et al. "Pilot-scale removal and recovery of dissolved phosphate from secondary wastewater effluents with reusable ZnFeZr adsorbent @ Fe3O4/SiO2 particles with magnetic harvesting." Water Research 109 (2017): 77-87.

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