Water Research, Год журнала: 2024, Номер 255, С. 121524 - 121524
Опубликована: Март 27, 2024
In the context of circular economy and global shortage phosphorus (P) fertilizer production, it is crucial to effectively recover P during treatment disposal sewage sludge (SS). Although thermal SS has been widely applied, a targeted reclamation route not yet well established. This study comprehensively investigated compared physicochemical properties solid residues (hydrochar (HC), biochar (BC), ash (SSA), hydrochar (HCA), (BCA)) after application three typical techniques (i.e., hydrothermal carbonization (180‒240 °C), pyrolysis (400‒600 °C) combustion (850 ℃). speciation transformation processes were extensively explored followed by rational proposal effective routes. Specifically, processing decomposed organic converted non-apatite apatite P. Orthophosphate-P was found be main species in all samples. Physicochemical resulting thermal-derived products significantly affected thereby determining their feasibility for different purposes. particular, recommended agricultural use due higher harmful metals content, while acid leaching can an alternative solution synthesize non-Fe-containing because lower co-dissolved Fe content leachate. HC BC offer option synthesis containing products. Eventually, demonstrate great potential agriculture application, however, comprehensive risk assessment should conducted before real-world applications.
Язык: Английский