Phosphorus Release Dynamics from Ashes during a Soil Incubation Study: Effect of Feedstock Characteristics and Combustion Conditions

Autor: Berta Singla Just, Pablo Martín Binder, Nagore Guerra-Gorostegi, Laura Díaz-Guerra, Rosa Vilaplana, Nicola Frison, Erik Meers, Laia Llenas, Ana Robles Aguilar
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Agronomy, Vol 14, Iss 5, p 935 (2024)
Druh dokumentu: article
ISSN: 14050935
2073-4395
DOI: 10.3390/agronomy14050935
Popis: Recovering phosphorus (P) through combustion from waste streams, like wastewater sludge and animal manure, offers a promising solution. This research explores the P release patterns in different ashes derived from secondary raw materials, using a long-term soil incubation lasting 160 days. The study evaluated the P release dynamics in five types of ashes from enhanced biological phosphorus removal (EBPR) systems and pig slurry burned at different temperatures. According to the results, a primary effect was observed on P bioavailability during the initial incubation period. All tested ashes release more than 50% of the total P applied between days 5 and 10. Ashes from EBPR exhibited higher P release than those from pig manure, indicating ash origin as a key factor in P release. Additionally, combustion temperature was crucial, with higher temperatures resulting in increased P release rates. Furthermore, the Pearson correlation revealed a strong relationship between the characteristics of the ashes and the amount of P release. Overall, these findings suggest that ashes could be a valuable P-source for agriculture avoiding the process of wet chemical P extraction, thus reducing both economic and environmental costs.
Databáze: Directory of Open Access Journals
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje