Characterization of the ash samples before and after thermal processing aiming phosphorus extraction and residues valorization
Articles > Article · 2025
Authors: Georgeta Predeanu, Bruno Valentim, Luminita Georgeta Popescu, Alexandru Traian Abagiu, Lucica Anghelescu, Mihaela Niculina Balanescu, Barbara Bialecka, Elza Bontempi, Magdalena Cempa, Marius Florin Dragoescu, Alexandra Guedes, Özben KUTLU, Mattia Massa, Elsayed Mousa, Adrian Ionut Nicoara, Hayati Olgun, Valerica Slavescu, Bogdan Stefan Vasile, Guozhu Ye
International Journal of Coal Geology, Journal Indexed in SCI, International, WoS, 2025, vol 307, pp 104808-104808
DOI: 10.1016/j.coal.2025.104808
Summary
This paper presents the prospect of phosphorus (P) - rich poultry litter manure ash (PLA) used to recover P through microwave heating methods, aiming for residual slag recycling in constructions. The results show the complex composition of the ashes characterized by X-ray fluorescence (XRF), reflected light optical microscopy, X-ray microanalysis (SEM/EDS) and X-ray diffraction (XRD), which explains the differences between the ash types and the operation temperature in the combustion chamber. At the same time, the results present a novel approach of using microwave heating by reducing energy consumption to extract/enrich P from PLA and forming a by-product/residual slag used as a supplementary cementing material. Samples of fly ash (FA) and bottom ash (BA) were collected from two fluidized bed incinerators (G & uuml;res and Beypi in T & uuml;rkiye) operating at 750 degrees C and 850 degrees C within the PHIGO project funded by the 3rd ERA-MIN Program of the European Union Commission.