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Continuous Phosphorus Recovery by Heterogeneous Nucleation: Challenges in Solid-Liquid Separation

Förster, Eva; Illies, Sarah; Anlauf, Harald; Nirschl, Hermann


Phosphorous (P) is an essential natural resource of limited availability. Furthermore, many countries, including Germany, have no access to P sources and are entirely dependent on P imports to cover their demand. Therefore the recovery of P is a topic of distinct importance. In the past decades a manifold of processes for P recovery from wastewater have been developed. The P-RoC-process (Phosphorus Recovery by Crystallization) is a technique developed by Competence Center for Material Moisture (CMM), KIT, based on crystallization of P on a Calcium-Silicate-Hydrate (CSH) substrate [1]. The feasibility of the approach has been shown on the lab scale and also as a semi-batch process on the pilot scale in a side stream of a municipal sewage plant. For full implementation of the process, a transition from semi-batch to a continuous process is desirable. However a crucial question still to be solved is the removal of the P-loaded substrate from the process. Challenges for the CSH separation are the particle size distribution that will result in a distribution in reaction kinetics and thus a difference in P coverage with particle size. Additionally comminution of the highly porous particles might also be an issue. ... mehr

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DOI: 10.5445/IR/1000063415
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Mechanische Verfahrenstechnik und Mechanik (MVM)
Publikationstyp Proceedingsbeitrag
Publikationsjahr 2016
Sprache Englisch
Identifikator urn:nbn:de:swb:90-634152
KITopen-ID: 1000063415
Erschienen in Filtech 2016, 11. - 13. Oktober 2016, Köln [L11 / F1- Short Oral + Poster Presentations - Slurry Pretreatment - Fractionation and Sorting]
Schlagwörter Classification, Hydrocyclone, Phosphate, Scale-up, Solid-Liquid-Separation, Wastewater
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