Continuous phosphorus recovery by heterogeneous nucleation: Challenges in solid-liquid separation

E. Förster*, S. Illies, H. Anlauf, H. Nirschl, Karlsruhe Institute of Technology (KIT), Germany

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 CMM, KIT, based on crystallization of P on a Calcium-Silicate-Hydrate (CSH) substrate...

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. The task at hand thus requires a separation unit that allows for classification as well as for separation of the particles...

Session: L11 / F1- Short Oral + Poster Presentations
Day: 12 October 2016
Time: 14:45 - 16:45 h

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